WO2010111955A1

WO2010111955A1 - Seat type tricycle with low-seat and main frame thereof

Info

Publication number: WO2010111955A1
Application number: PCT/CN2010/071475
Authority: WO
Inventors: 张向阳
Original assignee: Zhang Xiangyang
Priority date: 2009-04-02
Filing date: 2010-03-31
Publication date: 2010-10-07
Also published as: CN101850814A

Abstract

A seat type tricycle with a low-seat and a main frame thereof are provided. The main frame includes a front tube (2), a front bracket (3), a lower bracket (4), a rear bracket (5) and a fitting position (8) for a seat. Parallel double tubes in the middle of the rear bracket (5) are straight tubes horizontally arranged. A plane formed by the center lines of the double tubes and the center line of the front tube (2) make an angle of 40-66 degree. The plane is located under the center of the top section circle of the front tube (2), and a vertical distance between the plane and the center of the top section circle of the front tube (2) is 0-300 mm. An inner gap between the parallel double tubes in the middle of rear bracket (5) is 50-310 mm. The seat is directly mounted on the fitting position (8) for a seat. The seat type tricycle of the present invention is characterized by the low-seat and the low running gravity center, so the vehicle is not easy to overturn during riding and the safety performance is better.

Description

Low seat seated tricycle and its main frame

Technical field

The present invention relates to a tricycle and a frame thereof, and more particularly to a miniature, lightweight, low-seat three-wheeled vehicle and its main frame. Background technique

Ordinary tricycles and three-wheeled electric vehicles have better stability than bicycles and two-wheeled electric vehicles at low speeds. However, ordinary tricycles adopt the riding mode. The seats are high and the center of gravity is high. When the speed is fast, it is easy to turn over.

The Chinese patent application ZL 20051 0036649. X of the applicant of the present application discloses a seated tricycle which adopts a seated driving mode, which greatly reduces the center of gravity and improves the stability of the vehicle, but the patented main frame The vertical pipe sleeve and the steering transmission member are added, and the handlebar must be driven by the steering transmission member to realize the steering, so the structure is complicated.

The Chinese patent ZL 20051 0036706. 4 of the applicant of the present application discloses a center axle front-mounted three-wheeled vehicle, which does not employ the steering transmission as described above, but passes through the center shaft and reduces the front tube. The angle of inclination enables seated driving. In the patent, the front tube rear inclination angle refers to the angle between the front tube axis and the ground plane in the case of the whole vehicle landing, and does not define the angle and positional relationship between the front tube and the main frame components; meanwhile, the patent There are many connection accessories for the main frame, the frame is poorly assembled, and the seat cannot be adjusted back and forth, so it still needs to be improved. Summary of the invention

In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide a low seat, three-wheeled tricycle that has a low seat, a low center of gravity, and a vehicle that is not easily turned over during driving; another object of the present invention is to provide A low-seat tricycle main frame that is resistant to lateral impact.

In one aspect, in order to achieve the above object of the present invention, the present invention provides a low seated three-wheeled vehicle including a frame and a seat, wherein the frame includes a main frame and is mounted at the rear of the main frame a rear axle connecting device, and the rear axle connecting device further comprises a guiding member, a connecting bracket assembly, a supporting member and a rear axle; wherein

The main frame includes a front tube, a front frame, a lower frame, a rear frame, a guide connecting portion, and a support The bracket and the seat assembly position; the upper end of the front frame is connected with the front tube, the lower end of the front frame is connected with the lower frame; the rear end of the lower frame is connected with the rear frame;

The rear frame includes two tubes which are juxtaposed in the left and right and which are connected by a cross tube of the rear frame, and the rear portions of the double tubes extend rearward and are connected to each other to form a shelf;

The lower frame includes two tubes which are juxtaposed in the left and right and which are connected by the cross tube of the lower frame; the front end of the lower frame is connected with the front frame, or the front frame is connected with the front frame; the rear end of the lower frame is rearward Extending or bending extending rearwardly and upwardly to the rear of the rear frame, or through the rear frame connecting member to the rear of the rear frame;

The guide connecting portion is located at the middle or the rear of the lower frame;

The support bracket is located at the middle or the rear of the rear frame or at the rear upper end of the lower frame; the seat assembly position is located at the middle or the front of the rear frame;

The parallel double tubes in the middle of the rear frame are horizontally arranged straight tubes, and the plane formed by the center line of the double tubes is at an angle of 4-6-6 to the center line of the front tube. Between the center of the top section of the front tube, the vertical distance from the center of the top section of the front tube is between 0 and 00 mm; the internal gap between the two tubes in the middle of the rear frame is between 5 0__ 3 1 0 mm Between

The seat is mounted directly on the seat assembly. Wherein, the seat assembly position refers to a middle portion or a front portion of the rear frame, which may include a flat, a sliding slot, a mounting hole, and the like. Preferably, the parallel double tube in the middle of the lower frame is a straight tube, and the plane formed by the center line of the double tube is located below the center of the top section of the front tube, and the vertical distance from the center of the top section of the front tube is between 200 and 4 0 { Between mm; the plane formed by the centerline of the double pipe in the middle of the lower frame and the plane formed by the centerline of the double pipe in the middle of the rear frame are between 0 and 15. The inner gap between the parallel tubes in the middle of the lower frame is between 40 and 300 mm. Thus, in the tricycle of the present invention, the angle and distance parameters are clearly positioned for the main part of the main frame including the angle and the positional relationship between the front tube, the lower frame and the rear frame, and the positioning is coordinated with the selection 1 2 - 22 inches of small wheel front and rear wheels, making the seat installation position of the tricycle low and the center of gravity of the whole vehicle low, so the vehicle is not easy to turn over during driving, and the safety performance is good; at the same time, the seat is directly installed in the seat The seat assembly position, instead of the seat frame is connected to the main frame, can further reduce the center of gravity; and the rear frame and the lower frame are composed of double tubes arranged side by side and right, forming an ideal assembly platform, greatly improving the main The assembly performance of the frame, the internal clearance between the double tubes can be adapted to different installation requirements. Moreover, in the tricycle of the present invention, the parallel double tubes of the rear frame can be connected through the cross tubes of the rear frame to improve the structural strength of the main frame; The parallel arrangement of the frame and the rear frame to form a diamond-shaped three-dimensional structure can further improve the structural strength of the main frame and its ability to resist lateral impact. Further, in order to achieve the object of the low seat, the front and rear wheels of the present invention preferably select a small wheel of 10 to 22 inches. In the present invention, the front frame has two options: one of the solutions is a single pipe, the upper end of the single pipe is connected with the front pipe, and the lower end of the single pipe is bent backward to meet the front part of the lower frame, or The lower frame connecting the front part of the lower frame; the other side of the front frame is a double pipe, the double pipe is symmetrically arranged left and right, the double pipe is connected by the horizontal pipe of the front frame, and the upper end of the double pipe It is connected with the front pipe, or is connected to the front pipe through the front pipe connecting member, and the lower end of the double pipe is bent backward to respectively connect with the double pipe at the front end of the lower frame. In the low seated tricycle of the present invention, the front end of the rear frame may be in contact with the middle or front portion of the lower frame, or the front end of the rear frame may be in contact with the front frame. In the low seated tricycle of the present invention, the guide connecting portion may include two guide connecting pipes which are symmetrically arranged left and right and have concentric through holes, and the guiding connecting pipe is fixed to the frame in the middle of the lower frame. Or; the guide connecting portion comprises two guide connecting plates which are symmetrically arranged left and right and have concentric through holes, and the guiding connecting plate is fixed on the upper side or the lower side of the middle of the lower frame. In the low seated tricycle of the present invention, the support bracket may include a bracket fixing tube provided with a thread at both ends and a bracket side plate fixed to both sides thereof, the bracket fixing tube extending out of the side of the bracket side panel, the bracket side panel It is fixed on the upper side or the lower side of the double tube at the rear of the rear frame. In the low seated tricycle of the present invention, the seat assembly position may include a flat plate provided with a longitudinal chute fixed to the middle of the rear frame; or, the seat assembly position includes more than two mounting holes The flat plate and the U-shaped code are sleeved on the parallel double tubes in the middle of the rear frame by U-shaped chips. In the low seated tricycle of the present invention, the main frame may further include a middle axle bushing at a lower end of the front frame or a front end of the lower frame, the middle axle bushing including a carriage fixed at a bottom thereof, the carriage being provided Several chutes, for example, 2-4 chutes. In this way, the positioning screw connection with the main frame can be realized by the connecting screw passing through the chute, and the chute can adjust the specific position of the middle shaft bushing on the main frame, thereby adjusting the tightness of the chain. In the low seated tricycle of the present invention, the connecting frame assembly may include two left and right symmetrically arranged connecting brackets and a plurality of (for example, three) fixed ends on the left and right sides. a connecting pipe on the connecting frame; a front end of the guiding member is connected with the connecting portion of the guiding member, and a rear end thereof is connected with the connecting frame assembly; an upper end of the supporting member is connected with the supporting member bracket, and a lower end thereof is connected with the connecting frame assembly or the guiding member The rear part is connected; the rear axle is arranged in the middle of the connecting frame assembly. In the low seated tricycle of the present invention, the guiding member may include a guiding plate, a sleeve fixed to the front end of the guiding plate and a slot plate with an opening downward; the guiding plate is a flat plate, and the trough plate is fixed on the trough plate The lower side of the rear half; the grooved two side walls are respectively provided with a plurality of (for example, three) open downward fitting grooves, wherein one of the fitting grooves is engaged with the rear axle, and the remaining fitting grooves are fixed with the connecting pipe The sleeve is hinged to the connecting portion of the guide member disposed on the lower frame; the support member may be a left and right shock absorber, and the upper ends of the left and right shock absorbers are respectively hinged to the sides of the support bracket, and the lower ends are respectively left and left , the right connecting frame is hinged. On the other hand, in order to achieve the object of the present invention, the present invention also provides a main frame for a low seated tricycle, the main frame including a front tube, a front frame, a lower frame, a rear frame, and a guide member a connecting portion, a support bracket and a seat assembly position; the upper end of the front frame is connected to the front tube, the lower end of the front frame is connected to the lower frame; and the rear end of the lower frame is connected with the rear frame;

The parallel double tubes in the middle of the rear frame are horizontally arranged straight tubes, and the plane formed by the center line of the double tubes is at an angle of 4-6-6 to the center line of the front tube. Between the center of the top section of the front tube, the vertical distance from the center of the top section of the front tube is between 0 and 00 mm; the internal gap between the two tubes in the middle of the rear frame is between 5 0__ 3 1 0 mm between. The advantages of the low seated tricycle of the present invention are:

1. The seat is low and the center of gravity is low. The vehicle is not easy to turn over during driving, and the safety performance is good; 2. The seat is easy to install and can be adjusted back and forth, which increases the comfort and safety of the ride. The seat of the invention can be adjusted back and forth, and is suitable for people of different body types and ages;

3. The mutual positional relationship of the main components of the main frame is clearly positioned, and the structural strength is high and the lateral impact resistance is strong. DRAWINGS

Figure 1 is a perspective view of the main frame of the embodiment 1 of the present invention;

Figure 2 is a perspective view of the main frame of the embodiment 2 of the present invention;

3 is a schematic view of the mutual positional relationship between the parts of the main frame of the present invention; FIG. 4 is a schematic view of the mutual positional relationship between the parts of the main frame of the present invention; FIG. 5 is a schematic view of the positional relationship between the parts of the main frame of the present invention. Figure 6 is a schematic view of the mutual positional relationship between the parts of the main frame of the present invention; Figure 7 is a schematic view of the mutual positional relationship of the main frame of the present invention; Figure 8 is a plan 6 of the mutual position of the main frame of the present invention Figure 9 is a perspective view of another technical solution of the seat assembly position, the guide connecting portion and the support bracket of the present invention;

Figure 10 is a perspective view of the guide plate of the present invention;

Figure 11 is a perspective view of the guide plate type rear axle connecting device of the present invention;

Figure 12 is a perspective view of the guide bar of the present invention;

Figure 13 is a perspective view showing the structure and assembly of the guide tube and the grooved plate of the present invention;

Figure 14 is a perspective view of the guide shaft type rear axle connecting device of the present invention;

Figure 15 is a perspective view of the guide frame of the present invention;

Figure 16 is a perspective view of the guide frame type rear axle connecting device of the present invention;

Figure 17 is a perspective view showing the assembly of the main frame and the guide plate rear axle connecting device of the present invention; Figure 18 is a schematic view of the low seat seated tricycle according to the first embodiment of the present invention; Figure 19 is the main frame with the central axle bushing. Schematic;

Figure 20 is a schematic view of the assembly of the central shaft bushing of Figure 19.

In the figure: Front tube 2 Front frame 3 Lower frame 4 Rear frame 5 Guide member connection 6 Support bracket 7 Seat assembly position 8 Rear axle connection device 9 Shaft sleeve 10 Front tube connector 21 Front frame connector 31 Front Cross tube 32 lower frame connecting piece 41 lower cross tube

42 Rear frame connecting piece 51 Rear frame cross tube 52 Guide connecting tube 61 Guide connecting plate 62 Bracket fixing tube 71 Bracket side plate 72 Plate 81 Mounting hole 84 U-shaped code 86 Guide 91 Connecting frame assembly 92 Supporting piece 93 Rear axle 94 Brake device 95 Hub motor 96 Guide plate 910 Bushing 911 Mounting groove 912 Guide rod 913 Guide tube 914 Grooved plate 915 Straight pipe 916 Horizontal Tube 917 connecting frame 921 connecting tube 922 shock absorber 931 support rod 932 carriage 101

Example 1

1, FIG. 17, and FIG. 18 are a low seated three-wheeled vehicle according to the present invention, which includes a frame, a front and a rear wheel, and a seat. The frame includes a main frame and a rear axle connecting device 9, The frame includes a front tube 2, a front frame 3, a lower frame 4, a rear frame 5, a guide connecting portion 6, a support bracket 7 and a seat assembly position 8; the front tube 2 has a length of 140 mm, and the front frame 3 of the embodiment In the case of a single pipe, the upper portion of the front frame 3 is a straight pipe, the upper end of which is connected to the front pipe 2, and the lower end is horizontally bent rearward and is connected to the front portion of the lower frame 4 through the lower frame connecting member 41.

The lower frame 4 of the present embodiment is formed by bending double tubes which are juxtaposed in the left and right and which are connected by the lower cross tube 42 in the middle. The inner gap between the left and right parallel tubes is 100 mm, and the above gap can be guaranteed. There is enough space between the double tubes to install the rear axle connecting device 9 and the battery box, controller and other components; the parallel double tubes in the front and middle of the lower frame 4 are horizontally arranged straight tubes, the double tube center line The plane formed is at an angle of 54 to the center line of the front tube 2. . The lower part of the lower frame is designed to facilitate the processing, to facilitate the installation of the rear axle connection device 9 and the battery box, and to make the appearance smooth and beautiful. The front portion of the lower frame 4 is again connected to the front frame 3 through the front frame connecting member 31 (since the front frame 3 of the present embodiment is a single tube, in order to ensure accurate positioning of the front tube 2, the lower portion and the lower frame 4 of the front frame 3 Two connections are used, the front end of which is tilted forwardly for laterally installing the middle axle bushing 10, and the middle of the middle axle bushing 10 is in contact with the front frame 3 (in other embodiments, the middle axle bushing 10 and the front frame) 3 may also be disconnected), the rear portion of the lower frame 4 extends rearward and upward and is in contact with the middle portion of the rear frame 5 through the rear frame connecting member 51.

The rear frame 5 of the present embodiment is formed by bending the left and right sides, and the two tubes connected in the middle through the rear frame cross tube 52 or the rear frame connecting member 51; the parallel double tubes in the middle of the rear frame 5 are horizontally arranged straight The tube, the double tube at the rear of the rear frame 5 extends rearwardly, and then each extends inwardly and is closed to form a shelf, the front portion of which extends forward and downward and the double tube of the lower frame 4 respectively (in other embodiments, Rack ( 5 ) The front double pipe can also be directly extended forward to the front frame ( 3 ) to facilitate the installation of the child seat in the extension), the rear of the lower frame 4 And the double pipe bends at the front part of the rear frame 5 are connected to each other to form a diamond-shaped three-dimensional structure in the rear part of the main frame; the center frame of the left and right sides of the rear frame 5 is parallel to the center line of the front tube 2 and the center line of the front tube 2 The angle is 54 °, and the plane is located below the center of the top section of the front tube 2 (the center of the top section of the front tube 2 is the center of the nozzle on the front tube 2), and the vertical distance from the center of the top section of the front tube 2 is 2 00mm. The inner gap between the two parallel tubes in the middle of the rear frame 5 is 1 1 2mm. The purpose of the straight tube is to facilitate the installation of the flat seat assembly position 8, and the seat mounted thereon can be fully adjusted front and rear. The purpose of leaving sufficient internal clearance between the double pipes is to facilitate the secure installation of the seat assembly position 8, so that the seat does not cause left and right yaw when the vehicle is traveling on uneven roads.

The front frame 3, the lower frame 4 and the rear frame 5 of the embodiment are all made of round tubes. In other embodiments, the front frame 3, the lower frame 4 and the rear frame 5 may be tubular, and both round tubes and also tubes may be used. An elliptical tube or a square tube can be used. During the processing, the double tubes of the left and right sides of the lower frame 4 can be bent once by a single tube, and then fixed together by the lower cross tube 42. The rear frame 5 can be used once. The two tubes are bent separately, and the rear ends thereof are respectively extended inwardly and closedly connected, and the left and right parallel tubes are fixed by the rear frame cross tubes 52.

The guide connecting portion 6 of the present embodiment is two left and right symmetrically disposed guide connecting tubes 6 1 and 6 1 with concentric through holes, and the guiding connecting tubes 6 1 and 6 1 are fixed in the middle of the lower frame 4 On the frame body, there is sufficient internal clearance between the guide connecting pipes 6 1 and 6 1 for mounting the rear axle connecting device 9.

The support bracket 7 of the embodiment includes a bracket fixing tube 7 1 which is threaded at both ends, and bracket side plates 72, 72 which are fixed on both sides thereof, and the bracket fixing tube 7 1 protrudes outside the bracket side plates 72, 72. The bracket side plates 72, 72 are fixed to the upper side of the rear side of the rear frame 5.

The seat assembly position 8 of the embodiment is fixed in parallel on the upper side of the middle frame of the rear frame 5, the seat assembly position 8 is a flat plate 8 1 , and the longitudinal direction of the flat plate 8 1 is provided with a sliding slot 82, which is installed in the seat. The seat on the seat assembly position 8 is adjusted by the combination of the quick release screw and the chute 82 to adjust the front and rear, so that it can be used by people of different body types and different ages; since the seat assembly position 8 and the middle portion of the rear frame 5 are arranged in parallel, The angle between the centerline of the front tube 2 and the plane of the seat assembly 8 is also 54. . The reason why the seat assembly position 8 is to be set is because the vertical distance between the seat and the middle shaft sleeve is greatly reduced as the seat height is lowered, which determines that the rider must extend the legs forward and downward. Take a seated driving, in this case, because the rider leans back and the center of gravity moves back, in order to ensure The seat has sufficient tolerance and the frame must have a seat assembly position 8.

As shown in Figs. 10 and 11, the rear axle connecting device 9 of the present embodiment includes a guide member 91, a link frame assembly 92, left and right shock absorbers 931, 931, and a rear axle 94. The connecting frame assembly 92 includes two left and right connecting brackets 921, 921 and three connecting pipes 922 which are fixed on the left and right connecting frames 921 and 921 at both ends, and three connecting pipes are at the inner end faces of the connecting frames 921 and 921. The upper part is roughly triangular, and the two connecting pipes are respectively disposed on the front and rear sides of the left and right connecting frames 921 and 921, and are the front connecting pipe 922 and the rear connecting pipe 922, and the other is disposed on the left and right connecting frames. The lower side of the middle portion of 921 is the lower connecting pipe 922; sufficient clearance is reserved between the front and rear connecting pipes for installing the flywheel (the flywheel is not shown); the rear axle 94 is mounted on the left and right by bearings The middle of the brackets 921, 921. The guiding member 91 includes a guiding plate 910, a sleeve 911 disposed at the front end of the guiding plate 910, and a grooved plate 915 (Fig. 10). The guiding plate 910 is a flat plate, and is heat-treated with a 1.5 mm thick steel plate to improve the resistance. The strength of the twisting deformation; the grooved plate 915 is fixed on the lower side of the rear half thereof, and the two side walls of the grooved plate 915 are respectively provided with three opening fitting grooves 912, wherein the intermediate fitting groove 912 and the rear axle 94 clearance fit, the front and rear mounting grooves 912, 912 are fixedly engaged with the front and rear connecting pipes 922, 922, and the rear half of the guiding plate 910 and the trough plate 915 are respectively provided with more than 8 mating and front The rear connecting pipes 922 and 922 are fixedly engaged with the mounting holes, and the guiding plates 910 and the trough plates 915 are fixed by the U-shaped code 86 and the middle portions of the front and rear transverse connecting pipes 922 and 922. When the rear axle connecting device 9 is assembled with the main frame, the sleeve 911 is hinged to the guide connecting pipes 61, 61 provided on the lower frame 4 through the guide shaft; and the upper ends of the left and right shock absorbers 931, 931 are fixed to the bracket The tube 71 is hinged on both sides, and the lower ends thereof are hinged to the left and right connecting frames 921 and 921, respectively. Since the guide plate 910 of the embodiment has the function of longitudinal deflection of the heat-treated steel sheet, and the connecting frame assembly 92 is connected to the main frame through the dampers 931 and 931, the main frame can greatly reduce the uneven road surface. Lateral impact.

The above is the frame structure of the low seated tricycle of the present invention. If the 18" front fork is installed in the front tube 2 of the above frame, the front wheel and handlebar of the 18" are attached to the front fork, and the center shaft and the ankle member are attached to the middle shaft sleeve 10, on the left Brackets 95, 95 are attached to the outer sides of the right connecting frames 921, 921, and the seat with the backrest is mounted on the seat mounting plate 81, and two 18" rear wheels are mounted on both sides of the rear axle 94, one of which The side rear wheel is alive with the rear axle 94, and the other rear wheel is fixed to the rear axle 94 to form a differential transmission, and a human tricycle is assembled. If the above-mentioned human tricycle is to be converted into an electric tricycle, the rear axle 94 can be fixed to the connecting frame assembly 92, and the hub motor 96 (Fig. 17) can be mounted on one side rear wheel, and the rear wheel and rear axle 94 on the other side. Connect, then install the battery, controller and electric control components on the frame. If the rear axle 94 is further improved, the above electric tricycle can also be converted into a human-powered electric tricycle.

As shown in Fig. 18, according to the above design parameters and the specifications of the front, rear and front forks, when the invention is assembled into a tricycle, the height of the center of the top end of the front tube 2 is about 600 mm after actual measurement. 18), the height of the centerline of the double-tube centerline of the rear frame 5 is about 400mm, and the height of the seat surface on which the seat is mounted is only about 450mm, which is about 250-350mm lower than the height of the saddle of the general tricycle. The center of gravity of the tricycle is mainly determined by the rider's center of gravity. Lowering the seat height reduces the center of gravity. Even if the seat height is matched with the 500-650mm rear wheel track, the assembled tricycle is not easy to drive. Turn over the side. Example 2

Fig. 2 shows another low seated tricycle of the present invention. Except for the front frame 3, the frame and the whole structure of the present embodiment are identical to those of the first embodiment. The front frame 3 of the present embodiment is a double pipe symmetrically disposed on the left and right sides, and the double pipes are connected through the front frame horizontal pipe 32, and the upper ends of the double pipes and the front pipe 2 are connected to the front pipe 2 through the front pipe connecting member 21. (In other embodiments, the upper ends of the double tubes may also be bent inwardly and directly connected to the front tube 2), and the lower ends of the double tubes are bent backward to respectively connect with the double tubes at the front end of the lower frame 4. In fact, the front frame 3 and the lower frame 4 of the present embodiment can also be regarded as a U-shaped frame which is juxtaposed to the left and right, and which is connected through the front frame horizontal pipe 32 and the lower frame horizontal pipe 42 in the middle, and the middle portion of the U-shaped frame The parallel double pipe is a straight pipe, and the front end of the double pipe extends forward and upward and is connected to the front pipe 2 through the front pipe connecting member 21, or the front ends of the double pipes are respectively bent inwardly to directly connect with the front pipe 2, and the double pipe The rear end of the tube extends rearwardly and upwardly to the double tube at the rear of the rear frame 5, or is connected to the rear portion of the rear frame 5 through the rear frame connecting member 51. In other embodiments, the front frame (5) front end double tube may also extend directly forwardly to the double tube of the front frame (3) to facilitate mounting the child seat in the extension. Compared with the second embodiment, the front frame 3 of the first embodiment adopts a single tube, and the main frame is smooth and beautiful in shape, light in shape and material-saving, but the front frame 3 has a slightly lower structural strength and can be used as a tricycle for transportation; The front frame 3 of the second embodiment adopts a double pipe, and the U-shaped frame has a solid three-dimensional structure and is simple in processing, and can be formed by one-time bending of a single pipe, but is slightly heavier and can be applied to a tricycle for cargo. In addition to the specific embodiments described above, the low seated tricycle of the present invention has His technical solutions are available for selection.

First, the rear frame 5 in the middle of the left and right side of the double pipe center line formed by the plane and the front tube 2 center line angle. In the embodiment, the angle is selected to be 54 °, and in other embodiments, the angle may be between 40 and 66. Choose between. If the angle is greater than 6 6 °, the frame is assembled so that the front tube rear inclination angle of the frame will be very close to the front tube rear inclination angle of the existing tricycle. The purpose of reducing the seat height of the tricycle is naturally impossible; If the angle is less than 40°, the seat setting may be too low, causing the lower frame to touch the ground and the assembly is poor, or the riding posture may become “full-lying” and not easy to ride; Too much to increase the length of the vehicle. The angle at which the front tube of the tricycle is tilted backwards is to find a suitable range among the above correlations, which can range from 4 0 to 66. The choice between them is shown in Figure 3 - Figure 4.

Second, the lower frame 4 the middle of the parallel double-tube center line and the plane of the rear frame 5 and the center of the double-tube center line. In the above embodiment, the two planes are parallel to each other. In other embodiments, the angle may be between 0 and 15. Choose between.

The lower frame 4 is both the main frame of the frame and an important assembly base. The main components on the frame, including the guide connection 6, the central axle casing 10, the battery compartment of the electric vehicle, and the controller are all mounted directly on the lower frame 4 or mounted on the lower frame 4 by simple connectors. In order to facilitate the processing and installation of the above components, the front and middle portions of the lower frame 4 may be the same straight pipe. When the vehicle is landing, the straight pipe is preferably parallel to the horizontal plane or adopts a front low and high rear inclined form so as to make the frame appearance Smooth and sporty. This angle of inclination is preferably between 0 and 15. The choice between, because if the angle is too large, the frame will lose its aesthetic sense and make the above components difficult to install or add unnecessary connectors, as shown in Figure 5-6.

3. Rear frame 5, lower frame 4 The vertical distance between the plane formed by the center line of the left and right sides of the middle tube and the center of the top section of the front tube 2. In the above embodiment, the plane formed by the center line of the parallel tube in the middle of the rear frame 5 is located below the center of the top end of the front tube 2, and the vertical distance from the center of the top end of the front tube 2 is 200 mm. In other embodiments, This distance can be selected between 0--300mm.

In the above embodiment, the height of the center of the top end of the front tube 2 is about 600 mm. If the plane formed by the center line of the double tube in the middle of the rear frame 5 is parallel to the center of the top end of the front tube 2, the seat height will exceed 6 5 0mm. Even if the 1 4" front and rear wheels and the 14" suspension fork are used, the seat height will exceed 55 mm. Therefore, in order to achieve the goal of low seat and low center of gravity, the middle frame of the rear frame 5 is arranged in parallel with the center line of the double pipe. The resulting plane should be located below the center of the top section of the front tube 2. However, the seat assembly position 8 cannot be set too low, because this affects the rider's riding posture, so the vertical distance between the plane formed by the centerline of the double tube in the middle of the rear frame 5 and the center of the top section of the front tube 2 is 0--300mm choice is appropriate. In addition, in order to ensure sufficient space between the lower frame 4 and the rear frame 5 for mounting the battery box, the controller and other components, the plane formed by the center line of the double tube in the middle of the lower frame 4 and the center of the top end of the front tube 2 are The vertical distance should be greater than 0-300mm, and this distance can be selected between 200__400mm, as shown in Figure 7-8.

Fourth, the guide connection. The guide connecting portion 6 cooperates with the support bracket 7 for positioning and connecting the rear axle connecting device 9, wherein the guide connecting portion 6 is for mounting the guide member 91. In addition to the above embodiments, the guide connecting portion 6 may further include two guide connecting plates 62, 62 (shown in Fig. 9) which are symmetrically disposed left and right and have concentric through holes. The guide connecting plates 62, 62 are directly fixed on the upper side or the lower side of the middle portion of the lower frame 4, and the left and right guiding member connecting plates 62, 62 can also be reinforced by one or two horizontal plates, and the guiding member connecting plate 62 The distance between the through hole of the 62 and the plane of the center line of the double pipe in the middle of the lower frame 4 may be selected between 0 and 100 mm; the connecting portion of the guide member 6 may be disposed in the middle of the lower frame 4 or At the back of the lower frame 4, see Figure 5 - Figure 6.

5. Support bracket. The support bracket 7 is used to mount the support member 93. The bracket side plates 72, 72 of the first embodiment are fixed to the upper side of the rear side of the rear frame 5, and in other embodiments, the side plates can also be fixed to the lower side of the rear side of the rear frame 5. Or fixed on the upper side or the lower side of the middle of the rear frame 5, and the distance between the center of the bracket fixing tube 71 and the rear or middle portion of the rear frame 5 may be selected between 0 and 100 mm. 5 to FIG. 6; in addition to the embodiment, the support bracket 7 can also directly adopt the bracket fixing pipe 71 provided with threads at both ends, and fix it laterally in the rear or middle of the rear frame 5. The upper or lower side of the double pipe, or the rear upper end of the lower frame 4, is shown in FIG.

Sixth, the seat assembly position. The seat assembly position 8 is for mounting the seat, and the main body is a flat plate 81. In addition to the flat plate solution with the chute 82 described in the above embodiment, the flat plate 81 can also be provided with more than two mounting holes for fixing the seat. 84, the seat is fixed to the seat assembly position 8 through the mounting hole 84, and the flat plate 81 is sleeved on the parallel double tube in the middle of the rear frame 5 by the U-shaped code 86, and is adjusted front and rear by the elastic U-shaped code 86, U-shaped The code fixing method is simple and reliable. If the plate 81 is further provided with a chute 82, the seat passes the U-shaped code. 86 plus the adjustment of the chute 82, the seat front and rear adjustment range is larger, as shown in Figure 9. Seven, rear axle connection device

The rear axle connecting device 9 is used for mounting the rear axle 94 and then the two rear wheels. Due to the technical solution of the rear axle connecting device, the main frame and the rear axle connecting device can be easily disassembled and assembled, so that the tricycle owner of the present invention can The frame size of the frame and the entire vehicle can be greatly reduced, which can greatly reduce the packaging and transportation costs.

In the above embodiment, the rear axle connecting device 9 adopts a guide plate type, and the guide member 91 is a guide plate 910; in addition, the rear axle connecting device 9 can also adopt a guide shaft type and a guide frame type.

As shown in Figs. 12 to 14, the link frame assembly 92 and the support member 93 in the guide shaft type rear axle connecting device are the same as the guide plate type rear axle connecting device except for the guide member 91. The guiding member 91 of the guide shaft type rear axle connecting device comprises a sleeve 911, a guiding rod 913, a guiding tube 914 and a slot plate 915 having an opening downward; the two side walls of the grooved plate 915 are respectively provided with three opening directions The lower mounting groove 912, wherein the middle mounting groove 912 is engaged with the rear shaft 94, the front and rear mounting grooves 912 are fixedly engaged with the front and rear connecting pipes 922, 922, and the panel of the grooved plate 915 is provided with 8 The above mounting holes are fixedly engaged with the front and rear connecting pipes 922 and 922, and are fixed by the U-shaped code 86 or other connecting members to the middle portions of the front and rear connecting pipes 922 and 922; the casing 911 is laterally fixed to the guiding The front end of the rod 913, the guide tube 914 is longitudinally fixed on the upper surface of the trough plate 915, the rear portion of the guide rod 913 is hinged with the guide tube 914, and the sleeve 911 passes through the guide shaft and the guide member provided on the lower frame 4. The connecting pipes 61 and 61 are fitted and hinged; the supporting members 93 are left and right shock absorbers 931 and 931, and the mounting and connecting methods of the shock absorbers 931 and 931 are the same as those of the embodiment. Since the guide bar 913 of the present embodiment is hinged to the guide pipe 914, and the link frame assembly 92 is coupled to the main frame via the dampers 931, 931, the main frame can also greatly reduce the lateral impact force from the uneven road surface.

As shown in Figures 15-16, the bracket assembly 92 in the guide frame rear axle attachment is identical to the guide plate rear axle attachment, except for its guide 91. The guide member 91 of the guide frame type rear axle connecting device is a guide frame structure, and the guide frame includes a sleeve 911, two straight tubes 916, 916 and openings which are symmetrically arranged left and right and are connected by one or more horizontal tubes 917 in the middle. The downward grooved plate 915; the structure of the grooved plate 915 and its connection method are the same as the grooved plate 915 in the guide shaft type rear axle connecting device. The sleeve 911 is laterally fixed to the front end of the straight tubes 916 and 916, and the rear portions of the straight tubes 916 and 916 are fixed to the grooved plate 915 or fixed by the U-shaped code 86 and the grooved plate 915; The support members 93 in the shaft connecting device are left and right support rods 9 32, 9 32 , the upper ends of the support rods 9 32 and 932 are fixed to the support bracket 7 , and the lower ends are fixed to the left and right joint frames 921 and 921 . Since the guide frame and the connecting frame assembly 92 of the embodiment are fixedly fixed, and the two ends of the supporting rods 932 and 932 are respectively fixed to the connecting frame assembly 92 and the main frame, the main frame is directly affected by the uneven road surface. Lateral impact force.

The rear axle 94 and the connecting frame assembly 92 have three connection methods: 1. abutting; 2. fixing; 3. the rear axle 94 is two half shafts, one is connected with the connecting bracket assembly 92, and the other is connected. The frame assembly 92 is fixed. When the human tricycle is assembled by using the main frame of the present invention, the rear axle 94 is a living shaft, and the fitting groove 912 intermediate the grooved plate 915 is a clearance fit. When the electric tricycle is assembled by using the main frame of the present invention, the rear axle 94 is a fixed shaft, and the mounting groove 912 between the rear shaft 94 and the grooved plate 915 is fixedly engaged and fixed to the connecting frame assembly 92; when the power-assisted electric tricycle is assembled by using the main frame of the present invention, The shaft 94 has two half shafts, one abutting the connecting frame assembly 92 and the other being fixed to the connecting frame assembly 92, wherein the movable shaft is used to mount a human-powered flywheel, and the fixed shaft is used to mount the hub motor 96.

Eight, the shaft casing

In addition to the center shaft sleeve of the above embodiment, the center shaft bushing of the present invention can also be as shown in Figs. 19-20. The center shaft bushing 1 0 includes a carriage 1 01 fixed to the bottom thereof, and the carriage is provided with a plurality of chutes, for example, 2-4 chutes. The chute adjusts the position of the mid-axis bushing on the main frame so that the tightness of the chain can be adjusted.

Claims

Rights request

A low seated three-wheeled vehicle comprising a frame and a seat, the frame comprising a main frame and a rear axle connecting device (9) mounted at a rear of the main frame, the rear axle The connecting device (9) includes a guiding member (91), a connecting frame assembly (92), a supporting member (93) and a rear axle (94); wherein

The main frame comprises a front tube (2), a front frame (3), a lower frame (4), a rear frame (5), a guide connecting portion (6), a support bracket (7) and a seat assembly position. (8); the upper end of the front frame (3) is connected to the front tube (2), the lower end of the front frame (3) is connected to the lower frame (4); the rear end of the lower frame (4) and the rear frame (5) Docking; among them,

The rear frame (5) comprises two tubes which are juxtaposed to the left and right and which are connected by a cross tube (52) of the rear frame. The rear portions of the double tubes extend rearward and are connected to each other to form a shelf; the rear frame (5) The front end is connected to the middle of the lower frame (4) or to the front frame (3); the lower frame (4) includes left and right juxtaposed, and the middle cross frame (42) The double pipe connected; the front end of the lower frame (4) is connected to the front frame (3), or is connected to the front frame (3) through the front frame connecting member (31); the rear end of the lower frame (4) extends rearward Or the rearward extension of the bend is connected to the rear of the rear frame (5), or the rear frame (51) is connected to the rear of the rear frame (5);

The guide connecting portion (6) is located at the middle or the rear of the lower frame (4); the support bracket (7) is located at the middle or the rear of the rear frame (5), or is located at the lower frame (4) Rear upper end;

The seat assembly position (8) is located at a middle portion or a front portion of the rear frame (5); the parallel double tubes in the middle of the rear frame (5) are horizontally disposed straight tubes, and the plane formed by the center line of the double tubes The angle between the center line of the front tube ( 2 ) is 40-66. Between, and the plane is located below the center of the top section of the front tube ( 2 ), and the vertical distance from the center of the top section of the front tube ( 2 ) is between 0 and 300 mm; the rear frame ( 5 ) is juxtaposed with the double tube The internal gap between 50-31 Omm;

The seat is mounted directly on the seat assembly position (8).

2. The low seated tricycle according to claim 1, wherein the parallel double pipe in the middle of the lower frame (4) is a straight pipe, and the plane and the front pipe (2) of the double pipe center line The vertical distance of the center of the top section is between 200 and 400 mm; the lower frame (4) is the plane of the centerline of the double pipe and the plane of the rear frame (5). The angle is between 0 and 15. Between the lower frame (4), the inner gap between the two parallel tubes is between 40 and 300 mm.

3. The low seated tricycle according to claim 1, wherein the guide connecting portion (6) comprises two guide connecting pipes (61, 61) symmetrically arranged left and right and having concentric through holes. ) or a guide web member (62, 62), said guide member connecting tube (61, 61) or the web guide element ^(62, 62) fixed on the (4) in the middle of the shelf frame body.

4. The low seated tricycle according to claim 1, wherein the support bracket (7) comprises a bracket fixing tube (71) provided with a thread at both ends, and the bracket fixing tube (71) is laterally fixed. On the rear upper end of the lower frame (4); or, the support bracket (7) includes a bracket fixing tube (71) provided with threads at both ends, and a bracket side plate (72) for fixing the two sides thereof, the bracket The fixing tube (71) protrudes outside the bracket side plates (n, 72), and the bracket side plates (72, 72) are fixed to the upper side or the lower side of the rear side of the rear frame (5).

5, the seat sitting low as claimed in claim 1 according to the tricycle plate (claim ^8, wherein said bit mounting seat (8) comprises a longitudinal chute is provided ⁽⁸²⁾ a plate (81), 1) fixed in the middle of the rear frame (5); or, the seat assembly position (8) includes a flat plate ( ⁸ 1 ) and a U-shaped code ( ⁸⁶ ) having more than two mounting holes ( ⁸⁴ ), The flat plate (81) is sleeved on the parallel double tubes in the middle of the rear frame (5) by a U-shaped code (86).

6. The low-seat tricycle according to claim 1, wherein the main frame further comprises a middle axle sleeve at a front end of the lower frame or the lower frame (4) of the front frame (3)

(10), the center shaft bushing (10) includes a carriage (101) fixed to the bottom thereof, and the carriage (101) is provided with a plurality of chutes.

7. The low seated tricycle according to claim 1, wherein the connecting frame assembly (92) comprises two left and right symmetrically arranged connecting brackets (921, 921) and a plurality of fixed ends a connecting pipe (922) on the left and right connecting brackets (921, 921); a front end of the guiding member (91) is in contact with the connecting member connecting portion (6), and a rear end thereof and a connecting frame assembly (92) The upper end of the support member (93) is in contact with the support bracket (7), and the lower end thereof is in contact with the rear end of the connecting frame assembly (92) or the guiding member (91); 94) Located in the middle of the bracket assembly ( 92 ).

The low seated tricycle according to claim 7, wherein the guide member (91) includes a guide plate (910), a sleeve (911) that is laterally fixed to the front end of the guide plate (910), and a grooved plate with an opening downward ( ⁹ 15 ); the guide plate ( ⁹ 10 ) For a flat plate, a grooved plate (915) is fixed on a lower side of the rear half thereof; the groove-shaped two side walls of the grooved plate (915) are respectively provided with a plurality of downwardly downward fitting grooves (912), The mounting groove (912) cooperates with the rear axle (94), and the remaining mounting slots (912, 912) are fixedly engaged with the connecting tubes (922, 922); the sleeve (911) is disposed on the lower frame (4) The guide connecting portion (6) is hinged; the supporting member (93) is a left and right shock absorber (931, 931), and the upper ends of the left and right shock absorbers (931, 931) are respectively supported with the support bracket ( 7) hinged on both sides, and the lower end is hinged to the left and right connecting frames (921, 921).

9. A main frame for a low seated tricycle, the main frame comprising a front tube (2), a front frame (3), a lower frame (4), a rear frame (5), a guide member a connecting portion (6), a support bracket (7) and a seat assembly position (8); an upper end of the front frame (3) is connected to the front tube (2), and a lower end and a lower frame (4) of the front frame (3) The rear end of the lower frame (4) is connected to the rear frame (5);

The rear frame (5) comprises two tubes which are juxtaposed to the left and right and which are connected by a cross tube (52) of the rear frame. The rear portions of the double tubes extend rearward and are connected to each other to form a shelf, and the rear frame (5) The front end is connected to the middle of the lower frame (4) or to the front frame (3); the lower frame (4) includes left and right juxtaposed, and the middle cross frame (42) The double pipe connected; the front end of the lower frame (4) is connected to the front frame (3), or is connected to the front frame (3) through the front frame connecting member (31); the rear end of the lower frame (4) extends rearward Or the rearward extension of the bend is connected to the rear of the rear frame (5), or the rear frame (51) is connected to the rear of the rear frame (5);

The seat assembly position (8) is located at a middle portion or a front portion of the rear frame (5); the parallel double tubes in the middle of the rear frame (5) are horizontally disposed straight tubes, and the plane formed by the center line of the double tubes The angle between the center line of the front tube ( 2 ) is 40-66. Between, and the plane is located below the center of the top section of the front tube ( 2 ), and the vertical distance from the center of the top section of the front tube ( 2 ) is between 0 and 300 mm; the rear frame ( 5 ) is juxtaposed with the double tube The internal gap between them is between 50 and 31 Omm.

The low seated tricycle according to claim 9, wherein the parallel double pipe in the middle of the lower frame (4) is a straight pipe, and the plane and the front pipe formed by the center line of the double pipe (2) The vertical distance of the center of the top section is selected between ^{200 and} ⁴⁰⁰ mm; the lower frame (4) is arranged in the middle and the plane of the double tube center line and the rear frame (5) The plane formed by the parallel centerline of the double pipe is at an angle of 0-15. Between the lower frame (4) and the middle gap between the double tubes is between 40 and 300 mm.