WO2014056226A1

WO2014056226A1 - Balanced-force wrench

Info

Publication number: WO2014056226A1
Application number: PCT/CN2012/082921
Authority: WO
Inventors: 袁德俊
Original assignee: Yuan Dejun
Priority date: 2012-10-14
Filing date: 2012-10-14
Publication date: 2014-04-17

Abstract

A balanced-force wrench comprises a handle (1), a clutch jacket (14) connected to the handle, a driving rod (12) connected to the clutch jacket by using a force adjustment seat (5) and a connecting piece (11), and a working head (8) mounted at a lower end of the riving rod (12). An inner cavity of the clutch jacket (14) is connected to a balanced-force apparatus formed by a saw-toothed clutch upper body (8), a saw-toothed clutch lower body (9), and the force adjustment seat (5). When the balanced-force wrench loosens a bolt and a nut, the moment of force can be infinite, and when the balanced-force wrench tightens the bolt and the nut, the moment of force is unified and uniform. When the wrench is used to clamp a bolt and a nut disposed between a sleeper and a steel rail, the fracture of the steel rail due to an uneven internal stress can be avoided.

Description

Weight wrench

Technical field

The invention relates to the field of rail transportation, in particular to a force wrench for maintenance work of a rail transportation equipment.

Background technique

Railway transportation has always been the largest artery of Chinese goods and manpower transportation. With the continuous development of China's urbanization construction, transportation tools such as subway light rail have been popularized in various large and medium-sized cities in China. Among the most basic structures transported by these rails are rails and cement pillows laid under the rails, and the joints and fixings of the cement pillows and rails are done by bolts and nuts.

In the past, T-wrench or adjustable wrenches were commonly used in railway track maintenance. Light rails and subways use electric wrenches during the installation process. The problem with them is that the T-wrench does not have a balancing mechanism. The process of the T-branch varies with the strength of the operator's physical strength, and the torque force of the tightening bolts and nuts is different, and the clamping is relative to the rail. The force changes are different, which leads to uneven internal stress generated by the rail being clamped, and the potential hazard of the steel rail is generated when the train is subjected to high-speed operation and excitation and gravity are generated.

The electric wrench can be applied in a large-scale installation process, but since it is dependent on electric energy during use, it is necessary to drag the wires and cables during use, so that the wires and cables are dragged during the maintenance of the gap during normal transportation of the train. Failure to do so will result in an unpredictable loss of safe driving of the train.

technical problem

The object of the present invention is to provide a force wrench which can not only drag and drop wires, cables, but also has a force device to make the rails have a uniform clamping force and is easy to carry.

Technical solution

The invention is composed of a handle 1, a transmission rod 12, a working head 8, and a clutch outer sleeve 14 which constitute the main body of the balance wrench.

The invention comprises a force adjustment handle 2, a sawtooth clutch upper body 3, a strain gauge 4, a force adjustment seat 5, a wire 6, a digital display piece 7, a sawtooth clutch lower body 9, a sensor 10, a coupling member 11, and a force adjustment rod 13 Force agency.

The balance mechanism is mounted in the inner cavity of the main body clutch sleeve 14 and the transmission rod 12 of the balance wrench, and the handle 11, the clutch sleeve 14 and the transmission rod 12 are coupled by the coupling member 11, the force adjustment rod 13 and the force adjustment seat 5. Integral, a working head 8 is mounted at the lower end of the transmission rod 12.

The outer circumference of the upper body 3 of the sawtooth clutch is integrally formed with the clutch housing 14, and the inner circumference thereof is fitted to the upper end of the force adjusting seat 5, and the zigzag teeth at the lower end thereof are engaged with the lower body 9 of the sawtooth clutch. The amount of force that it engages is adjusted by the force adjustment handle 2 through the force adjustment lever 13.

When the operator pushes the handle 1 to rotate in the counterclockwise direction, the saw tooth clutch upper body 3 and the sawtooth clutch lower body 9 mesh, and the torque force of the transmission is infinite.

When the operator pushes the handle 1 to rotate in the clockwise direction, the inclined surfaces of the serrated teeth between the sawtooth clutch upper body 3 and the sawtooth clutch lower body 9 are in mesh with each other, so that the torque force transmitted by the sawtooth clutch is received. The force adjustment handle 2 adjusts the control of the force between the force adjustment lever 13 and the force adjustment seat 5. The torque transmitted therebetween passes directly through the sensor 10, and the strain gauges 4 are transmitted through the wires 6 to the digital display sheet 7 for display.

Beneficial effect

Therefore, the torque of the power wrench is infinite when the nut is removed, and the torque is determined according to the construction needs when the nut is tightened. When the rated torque is reached when the nut is tightened, the saw tooth clutch upper body 3 and the sawtooth clutch lower body 9 are slipped, thereby ensuring the uniformity of the torque force of the balance wrench during construction work.

DRAWINGS

Figure 1 is a schematic view of the structure of the present invention.

Embodiments of the invention

As shown in Fig. 1, in the construction work, firstly, the working force of the force wrench 8 which has adjusted the torque force according to the construction requirements, the outer hexagon of the nut which is set on the bolt of the cement rail and which is clamped on the bolt on the bottom edge of the rail The outer circumference, after which the two hands push the two handles 1 in the counterclockwise direction, the handle 1 will drive the clutch casing 14 welded thereto, and rotate synchronously in the counterclockwise direction, and the serrated clutch upper body 3 which is integrated with the inner cavity of the clutch outer casing 3 , the zigzag clutch lower body 9 engaged with the meshing coupling is synchronously rotated in the counterclockwise direction, and the force adjusting seat 5 which is synchronously coupled with the inner circumference of the sawtooth clutch lower body 9 is also driven, and rotates counterclockwise along with the clutch lower body 9, at the same time, The coupling member 11 is coupled to the transmission rod 12 at the lower end of the force-regulating seat 5, and the working head 8 coupled to the lower end of the transmission rod 12 is also rotated in the counterclockwise direction. And applying a torsion force to the nut on the bolt located in the inner cavity of the working head 8, causing the nut to be twisted counterclockwise with respect to the fixed bolt, and rising along the thread on the bolt, thereby generating the function of removing the nut on the bolt. .

Conversely, in the process of tightening the nut, the handle 1 is pushed to rotate clockwise, and the nut at the upper end of the bolt is twisted to the root of the bolt along the external thread of the bolt, and the twisting of the handle 1 is continued. The sawtooth clutch 3, which is located in its cavity and coupled with it, rotates clockwise and then continues to apply force, which exceeds the force display handle 2 set above the digital display panel 7, after the displayed torque Sliding between the upper body 3 of the sawtooth clutch and the lower body 9 of the sawtooth clutch, the force exerted by the handle 1 will only rotate in a clockwise direction, and the transmission rod 12 and the working head 8 will not be twisted any more. The torque force of the bolts and nuts is unified to the torque force set by the balance wrench according to the construction technical requirements. It ensures the uniform stress of the rail during the clamping process, and prevents and prevents the fracture of the rail from being uneven.

Claims

The utility model relates to a balance wrench, characterized in that: the handle (1) of the balance wrench is coupled to the clutch casing (14), the inner cavity is coupled with the saw-tooth clutch upper body (3), the lower end thereof and the sawtooth clutch lower body (9) Coupling, and through the force adjustment seat (5), the coupling member (11) is coupled to the transmission rod (12), and the working head (8) coupled to the lower end of the force transmission rod (12) is twisted to work.
The utility model as claimed in claim 1 , wherein the inner cavity of the clutch casing (14) is coupled with a sawtooth clutch upper body (3) and a sawtooth clutch lower body (9), and the force regulating seat (5) constitutes a balance. Force device To ensure uniform and uniform torque of the force wrench.