|Publication number||US2286245 A|
|Publication date||Jun 16, 1942|
|Filing date||May 10, 1939|
|Priority date||May 10, 1939|
|Publication number||US 2286245 A, US 2286245A, US-A-2286245, US2286245 A, US2286245A|
|Inventors||Joseph Antos, Wilson Fred D|
|Original Assignee||Western Austin Company|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (16), Classifications (5)|
|External Links: USPTO, USPTO Assignment, Espacenet|
'7 Sheets-Shee't l F. D. WILSON ETAL STREET SWEEPING MACHINE Filed May 10, 1939 June 16,v 1.942.
June 16, 1942. F. D. wlLsoN E-rAL STREET SWEEPING MACHINE 7 Sheets-Sheet 2 Filed May 1o. 1959 lfvenor-s -sn .'D, MASON zfoSEPH Euros BY. 7 j Fittornex `lume 16, 1942.
F. D. WILSON El"l\|` STREET SWEEPING MACHINE Filed May 10, 1939 '7 Sheets-Sheet 5 ai'/ Ens/SPH -H/yms F H: orney June1e,1942. e. D. WILSON mL 2,286,245
STREET SWEEPING MACHINE Filed May 10, 1959 7 Sheets-Sheet 4 l Ill l Il IIIIII IIII By, Mft/LP nlztorney June 16,'1942. F. 1;). wlLsoN ETAL STREET SWEEPING MACHINE Filed May 10, 1939 7 Sheets-Sheet 5 June 16, 1942- `F. D. wlLsoN E1'- AL *27,286,245
STREET SWEEPING MACHINE '7 Sheets-Sheet 6 Filed May l0, 1959 QttorneY (l F. D. WILSON E'I'AL Ju'ne 16, 1942.
STREET SWEEPING MACHINE Filed May l0, 1959 '7 Sheets-Sheet '7 www@ mVen'Qr-S Faso D. MLso/v JOSEPH ZN-ms HttorneY Patented June 16, 1912 UETE TS TE STREET SWEEPING RMCHINE Application May 10, 1939, Serial No. 272,858
4- Claims. (Cl. 15S- 83) Heretofore most of the self-propelled street ripheral speed to give the dirt `or trash the resweeping machines were designed to deposit maquired momentum.
terial at the foot of an elevator and elevate the Another object of this invention is to provide material into a carrying receptacle, which remeans which willautomatieally notify the 010er aquires a multiplicity of complicated parts to re- 5 tor when the material carrying receptacle iS full, pair and keep in working condition. Furtherand also manually operated means to move into more, separate frames were used upon which and Vout of contact with the material in the ma- -were mount-ed the broom, the dirt reeeptade, the torial carrying' receptacle and thus determine elevators and power plants supported by steering When the material Carrying reCeltaCle S ready and propelling wheels and this of necessity made 10 Vt0 be dumped `a long street sweeper which was dinicult to ma- Another object of 'this invention is to provide neuver in restricted areas. means whereby the operator can adjust the gut- One of the objects of this invention is 'to vprotet' bOOIl t0 the angle Of the gutter Without vide deneoting means which vcontacts the sweep- Stopping the sweeper, thus eliminating the necesmg broom and is adjustable es to the deoeoting l5 sity of Cleaning the gutter by hond labor. angle, or its normar relation to the vbrown, also Another object of this invention is to vso mount adjustable means to maintain constant relation the groom that independent VeltCal movement between the -defieeting means and the Ysweeping of the broom when in operating position can be broom as the broom Wea-rsaffected without disturbing lthe relation of any Ano-ther object of this invention is to provide 20 other'partathus allowingthe broom to drop into a self-propelling street sweeper which can be built depressions or move over humps during the in small sizes as well as large sizes andeliminates Sweeping Operation.
the use of elevators and conveyors to deposit the Another Object 0f this m'etttsn is t0 mount a material ingo the material Carrying receptacle, deflector on the front steering wheel which -will thus permitting the Sweeper to be made much 25 move the turning of the steering -wheel and thus shorter and increases its maneuverability in :re-` prevent: at all times the material being swept by strict-,ed regg the gutter broom from being thrown ahead of Another object of this invention is to provide a and in the path 0f the steering Wheelseli-propelled sweeper in which theengineframe Further Objects 0f this nventsn at@ t0 PTO' and the material carrying receptacle form the H, vide a construction of maximum simplicity, effimain frame of the machine, to which are mount- Cists esGnOmY and ease 0f assembly andopst'a ed the Supporting, driving and Steering Wheels tion, and such further objects, advantages and and the rotary brooms, thus eliminating the use Capabilities as Wm later'mors fully appeal' sind of a Special franm are inherently possessed thereby.
Another object of this invention is to provide .zo The invention further resides in the Combina" a self-propelled sweeper having a front steering tien constmctn and arrangement 0f parts wheel, one rear driving wheel and one rear sun- 'illustrated in the accompanying drawings and porting wheel, thus eliminating tueuse ,of a, df while we have shown therein a preferred embodiferentiaL ment, it is to be understood that the same is sus- Another object of this invention is to provide ill Cepttble of modcaton and Change Without de power means for raising and lowering the sweeppartmg from the stamt of the nvento ing broom, the defleetor andthe draw wings and It? the dmv/mss: also automatically move the movable bottom and Figure l isa Side elevation ofthe sweeper ShGW' curved plate of the material carryingre'ceptacle mg the brom m the normal Working position upward and forward and downward and backif and .a Sectwnal View of. the Cover adjustments Ward, 'thus permitting the dirt or trash to be andthe gutter broom dmve' dumped at stated intervals and the broom to Figure 2 1s a plan View of the`-entre Sweeper' Clear the dumped pue of dirt 01. trash Figure 3 is a side elevation and a partial cross Another Object Of this invention is to provide section showing the sectional views of the gas means .for driving the broom at a Constant rate i9 tank, water tank or reservoir and the material of speed, irrespective of the speed of the sweeper, Carrying tessptttslsf broom and other Coordiand thus vassure the operator that the dirt or matins parts in the normal working position. trash is being picked up and deposited in front of Figure Il is a side Cross sectional View of the the material carrying receptacle, as it is known rear portion of the sweeper including the entire that the broom must be driven at a certain pe- .35 material carrying reeeptacle and the water tank or reservoir, showing the broom, drag wings and dirt deflector in an elevated position for transportion.
Figure 5 is a cross sectional view of the sweeper at 5-5 in Figure 1.
Figure 6 is a side elevation with the rear portion cross sectioned to show the broom in the elevated position and the bottom of the material carrying receptacle elevated for dumping the material collected.
Figures 7 and 8 are side and cross sectional views of another form of means to adjust the deector to the groom.
Figure 9 is a plan and sectional view showing the frame of the sweeper and also the manually operated means to determine when the material carrying receptacle is full.
Figure 10 is a rear view of Figure 9 with the broom and other parts removed to show the frame construction and also the manually operated means to determine when the material carrying receptacle is full.
Figure 11 is a cross section of the side elevation shown in Figure 9 at II-II showing a portion of the frame and the steering axle in section, with the broom and the manually operated means to determine when the material carrying receptacle is full shown in dotted lines.
Figure 12 is a diagrammatic plan view of the sweeper showing the propelling and control mechanism and the sprinkling system.
Figure 13 is a cross section of the hydraulic cylinder shown in Figure 12 at I3-I3.
Figure 14 is a side elevation of the transmission gears for speed and directional control shown in Figure 12 at I4-I4.
Figure 15 is a view showing the method of adjusting the gutter broom from the operators seat or station while the sweeper is in motion.
Figure 16 is a partial cross section taken at I6-I6 in Figure l.
Figure 1'1 is a portion of the side elevation shown in Figure 6 to more clearly show some of the details.
Figure 18 is a cross section of Figure 17 at I8-I8.
Figure 19 is a cross section of Figure l2 at IS-IQ to show the relation of the transmission shaft and the gutter broom drive shaft to the means for keeping the drive chain in contact with the sprocket.
Figure 20 is an enlarged View and cross section-of the lower portion of the deilector showing means for adjusting the angular relation of the deflector to the broom.
Referring to the drawings:
The frame of the sweeper (see Figures 3, 4, 5, 6, 9, 10 and 11) is composed of two main parts, the engine main frame I and the material carrying receptacle 2, which are fastened together by bolts 3, forming a single unit upon which the sweeper parts are mounted.
The side plates 6 and 1 and the top plate II of the material carrying receptacle 2 are braced and stiffened on the inside by two diagonal braces I2 and I3, which are welded or otherwise secured to a reinforcing top member I4. To the lower end of the diagonal braces I2 and I3 are welded, or otherwise secured, reinforcing plates I5 and I5. Thus it is seen that the top reinfo-rcing member I4 and the diagonal braces I2 and I3, with the reinforcing plates I5 and I6, form one unit and prevent any side racking or twisting of the material carrying receptacle 2.
Wheel axle brackets 8 and 9, with wheel axles 8a and 9a mounted therein, are attached to the side plates 6 and 1 of the material carrying receptacle 2 and to reinforcing plates I5 and I 6 by bolts or rivets IG, thus making a rigid axle support and also stiifening the side plates 6 and 1.
The rear propelling wheel 4 and supporting Wheel 5 are mounted for rotation on the wheel axles 8a and 9a by ball or roller bearings I1 of the conventional type. The rear propelling Wheel 4 and supporting wheel 5 have the conventional type of hydraulic brake equipment I8. On the rear propelling wheel 4 is also mounted drive sprocket I9.
The front steering wheel 26 is mounted in a steering fork 2l on axle 22 by the conventional type of ball or roller bearings 23. The steering fork 2| is attached to the front end of engine main frame I by shaft 24, which revolves on the ball or roller bearings 25 mounted in the engine main frame I. On the shaft 24 is keyed or otherwise fastened a worm gear 26. The steering of the front steering wheel 20 is accomplished by the usual form of worm 21 attached to the steering shaft 28, which engages the worm gear 26 and is controlled by the operator by the use of hand wheel 29. The propelling power or engine 30 is mounted on the engine main frame I, which frame forms a housing for the usual type of transmission 3|, clutch 32 and gear shift lever 33, as shown in Figures 1, 12 and 14.
At the rear (see Figures 3, 4, 5, 6, '1 and 1l) and near the top of the material carrying receptacle 2 is shaft 34, mounted in bearings 35 which are bolted or otherwise secured to the side plates 6 and 1. Keyed or otherwise fastened to the shaft 34 on the outside of side plates 6 and 1 are levers 36 anad 31, and keyed or otherwise fastened to the shaft 34 on the inside of the side plates 6 and 1 are levers 3S. Rotatably mounted on shaft 34 are links 4i), to which are bolted arms 4I. Rotatably mounted on shaft 34 outside of levers 36 and 31 are links 45 and bolted or otherwise fastened thereto are bars 46, having adjustable screws 48 in the projection 49 to adjust the broom axle bearing brackets 5l), which have slotted holes 5I and are bolted to bars 46 by bolts 52.
The .'broom axle bearing brackets 50 have mounted therein roller or ball bearings 53 in which broom axle 54 rotates. On broom axle 54 is mounted and keyed the broom 55, and one end of the broom axle 54 sprocket 56 is keyed or otherwise fastened. Rotatably mounted on shaft 34 outside of link 46 is a double sprocket 51. Sprocket 56 is driven from double sprocket 51 by sprocket chain 58. The broom axle 54 and broom 55 are reversible and spacer 59 is used on one end of broom axle 54 to permit `the reversibility of broom axle 54.
Mounted on bars 46 (see Figures l, 4 and 6) and rigidly attached thereto is the broom cover 60, so designed that it rotates with the bars 46 and broom 55 concentric with the center of shaft 34 during the raising and lowering of the broom 55.
To prevent refuse, dirt or other material from being thrown thru the space above the broom 55 under the broom cover 66 and thence back to the ground, we have added a plate I4I which is swivelably connected to the broom cover 60 at |42. The lower end of plate I4I has adjustable bars |43 attached at |44. These adjustable bars |43 extend thru the broom cover 60 and have several holes |45 punched therein. As the broom 55 wears, the adjustable bars I43 can be moved upwardly and thereby the plate lill is kept in` contact with the broom 55. This adjustment is made by inserting a pin |56 thru bracket ll'l,
mounted on the outside of broom cover 5.6, and
into one of the holes |45.
Another means of adjustingA this plate |51. is shown in Figure 7 and consists of threaded bars Msc, which are movable up or down bymeans of threaded cranks mit, which are rotated in the direction desired in order to maintain a constant relation between the plate |1| and the broom 55.
Tol throw the material picked up by the broom 55 (see Figure 3) into the material carrying receptacle 2, a deector bares of the same width as the broom 55 is attached by welding or any other means to the lower ends of arms 4|.
An adjustable deflector bar may be desired, as some materials are heavier than others and consequently the angular relation of deflector bar 44 to the broom 55 would have to be slightiy modied to suit the material to be deposited in the material carrying receptacle 2 by the broom 55. An adjustable deector bar Ma is shown in Figure 26 and is similar to the delector bar l5 except that it has levers Mb and round' pins or bolts 55o welded to each end. Round pins or bolts de are inserted into circular holes idd of the arms rlI. To adjust the angular relation of the adjustable deector bar 44a to the broom 55, there is provided bolts 4de, which are inserted in the slots 54j of the arms 4|. By moving the levers Mib, the desired angularity can be secured, and tightening the bolts 44e at the desired position will maintain the A,
selected. angular relation of the adjustable deflector bar 44a to the broom 55.
To maintain a constant relation between the room 55 and the deiiector bar dll or Ma, we provide adjusting rods |33, the lower ends of which are swivelably attached to the links Il@ by pins |34. The upper ends of adjusting rods |33 are threaded to receive the adjusting cranks |55 which are also tapped for the threads of adjusting rods |33. The adjusting cranks |35 are mounted on the broom cover 66 by brackets |35.
Figures 7 and 8 show a single crank |37.l which is attached to shaft |53, and mounted thereon are beveled pinions |55. Instead of using adjusting cranks |35, we have substituted beveled gears |46 which are threaded to receive adjusting rods |33. Thus it is readily seen that both adjusting rods |53 can be adjusted by the rotation of the single crank |31.
To prevent the material from owing around the sides of the broom 55, there are mounted on either side of the broom 55, drag wingsl H8 (see Figures 1, 3, fl and 6) which are swingably connected to the side plates S and l by four links |21] and |2|. Links |25 are fastened to the lower part of drag wings ||S by pins |55 and to the lower part of side plates 6 and 'l b-y pins |24. Links |2| are fastened to the upper part of drag wings I8 by pins |3| and to the side plates 6 and by pins |32. On links ll are extensions |25, to the upper ends of which are attached springs |26 and adjustable rods |21 andnuts |28. Adjustable rods |27 are inserted thru holes in brackets |29, which are welded to side plates 6 and l.
Links d2 are swingably mounted to each side of the broom cover 66 and springs Il?,l are attached thereto. The top links of the chains 39 are attached to the hook-shaped ends of springs 43. The opposite ends of the springs 63 have U-boltsl attached to the drag wings 8 and inserted into the lower links of chains 3|);` Thus the drag wings H8' are lifted from the pavementl when the broom 55 is raised. This design permits adjustment of drag wings H3 as the broom 55 wears.
Swingably mounted on drag wings l 8 by bolts or pins |5| are guards |59 which prevent the broom 55 from throwing small stones or other material ahead of the material carrying receptacle 2 and outside of the rear propelling wheel 4 and supporting wheel 5.
On the outer ends oi levers 36 and 31 and connected thereto by pins 6| are connection yokes 62, which are attached to spring sleeves 64 by bolts 56. The lower ends of spring sleeves 64 have plates 69 weldedk thereto, with holes 61 in the center thereof thru which the spring rods 68 pass to make connection with the suspension spring anchors '16. which are attached to each side of the broom cover 66 by rivets, bolts or welding, as may be most convenient. The spring rods 68 have check nuts 72 and adjusting nut 13, as shown in Figures 1, 2, 4 and 6. The adjusting nut 13 is used to apply the proper tension on the springs 14 by I means of the spring rods 68. The upper ends of spring rods 68 have circular discs l5 welded thereto which are larger than the outside diameter of springs '14 and form a spring seat for the upper ends of springs 14. The springs 'lll and a portion of the spring rods 68 are enclosed in the spring sleeves 65 and the tension of the springs 'i4 is adjustable.
The above arrangement permits the broom 55 to raise or lower a slight amount without disturbing the levers 36 and 37, when passing over bumps or depressions during the sweeping operation.
The upper end 'll of lever 31 has two holes and the piston rod 16 of the hydraulic cylinder is connected to the upper hole by means of pin 18. The opposite end of hydraulic cylinder 'Il is attached to side plate by means of fulcrum 5B and pin 79, which permits the hydraulic cylinder to oscillate when raising and lowering the broom 55 and broom cover 66. The piston rod 'F6 has the usual piston 8|, packing cup 82, follower 33 and nuts St, and is used to apply power in one direction only. A description of its operation will be given later.
In Figures 2, 3, 4, 6 and ll, connected to the lower ends of levers 38 by pins B5 are links 86, which are in turn connected by pins 88 to segments 85. Segments 86 revolve on shaft 92 and are joined together by curved plate 6|, which also acts as a movable back for the material carrying receptacle 2. At the lower edge or segments 55 is shaft 53, about which the movable bottom 55 `of the material carrying receptacle 2 revolves during the raising and lowering movement.
The front ends of adjustable angle guides 65 are mounted on the outside of the side plates 6 and by bolts H5 and the rear ends have slotted holes Sil for vertical adjustment and are supported on pins |23 which are attached to the side plates 6 and 'l'. The rear ends of adjustable angle guides 96 are adjustable vertically and are provided with set screws |22 which contact pins |23 to determine the location. vertically of the adjustable angle guides 99.
The movable bottom 65 is made up of two plates 55 and 56, which are reinforced and held apart by spacers 67 which also stiffen the movable bottom 94. The top plate is bent downward at the rear end and joined to the bottom plate 96 by Welding to form a beveled edge. The forward end of plates 95 and 96 are formed to make a circular hinge about shaft 93. On each side of the movable bottom 94 are welded side plates 98 which contact the side plates 6 and 1 and move with the movable bottom 94 during the raising and lowering movement.
On each side of the rear end of movable bottom 94 (see Figures l, 3 and 4) are inserted pins |50 on which is mounted movable bottom guide 81, which slides back and forth on the adjustable angle guides 99 with the movable bottom 94.
The adjustment of adjustable angle guides 99 is to permit the raising and lowering of the rear end of the movable bottom 94, as sometimes light material will pass under the delector 44 when it is swept up b-y the broom 55, which would necessitate the lowering of the rear end of the movable bottom 94. Most material, however, can be deposited in the material carrying receptacle 2 and on the movable bottom 94 without making this adjustment.
In addition to front plate 2a of the material carrying receptacle 2, there is another front plate |00, which is formed in a semi-circle and welded to the side plates 6 and 1 and to front plate 2a and top plate I, and is also reinforced by stiffeners and |02.
On the upper edge of curved plate 9| is an adjustable scraper |63 connected thereto by bolts |04. In the upward movement of the movable bottom 94 and the curved plate 9|, the adjustable scraper |03 contacts the semi-circular front plate |09 and thereby removes all trash or dirt tending to stick to the semi-circle front plate |00.
From the foregoing description it is readilyT seen that the movements of the movable bottom 94 and the curved plate 9| are synchronized with the movements of the broom 55, the deflector 44 and the drag wings I8` The broom 55, the deeotor 44 and the drag wings I8 can be raised for transportation while the movable bottom 94 and the curved plate 9| remain in the carrying position (see Figure 4) and by admitting more oil to the hydraulic cylinder 11, thus continuing the upward movement of the broom 55, the deector 44 and the drag wings |I8, the movable bottom 94 and the curved plate 9| will move forward and upward and dump the refuse from the material carrying receptacle 2 and permit the broom 55 to pass over and clear the pile of refuse (see Figure 6).
To notify the operator when the material carrying receptacle 2 is ready to dump there is mounted above the movable bottom 94 and curved plate 9| shaft 65, which is revolvably mounted in side plate 1 within tube or shaft 65a and extends outside of side plate 6 and rear propelling wheel 4. On shaft 65 outside of rear propelling wheel 4 a lever is mounted. At the end of lever |05 is swingable block I 01 thru which is inserted a rod |08, which is connected to an eccentric |09 mounted on rear propelling wheel 4. Rigidly mounted on tube or shaft 65a outside of side plate 6 is a contact finger ||0 which contacts contact point |06 on shaft 65 when the dirt or trash in the material carrying receptacle 2 has raised feelers III, which are rigidly mounted on tube or shaft 65a, to the position shown by solid lines in cross section view, Figures 3 and 4. Contact linger |I0 has a wire connection H3 to bell ||2 and a wire connection` ||5 from bell ||2 to battery |I4, which is grounded to the frame by wire I|6. Thus, when the feelers are raised by the accumulation of dirt or trash in the material carrying receptacle 2 to the position shown by the solid lines (see Figures 3 and 4), contact is intermittently made between contact point |06 and contact finger I I0, which causes the bell I I2 to-ring and notify the operator on the operators seat or station |I1 that the material carrying receptacle 2 is full and ready to dump. Bell ||2 can be operated intermittently or continuously, depending on the desires of the operator.
We have shown in Figures 9, 10 and 11 a manually operated means for determining when the material carrying receptacle 2 is filled and this is under the control of the operator. On the outside of side plate 1 of the material carrying receptacle 2 is mounted Vertical shaft 2 I I on two brackets 2 I2. At the lower end and rigidly connected to shaft 2|| is lever 2|3. At the upper end of shaft 2I| is mounted the control handle 2|4. On the inside of the material carrying receptacle 2 is feeler 2|5, preferably made as shown in the drawings. One end of feeler 2|5 is rotatably mounted on side plate 6 and the opposite end is rigidly connected by a pin 2|1, or other means, to crank 2I6, which projects inwardly thru side plate 1. On the outside of side plate 1 is a connecting rod 2|8, one end of which is attached to the lever 2|3 and the other end is attached to crank 2I6. To maintain the feeler 2|5 in the position shown by the full lines in Figure 11, a spring 2I9 is provided, one end of which is attached to the side plate 1 and the other end to lever 2 I 3.
To determine when the material carrying receptacle 2 is lled, the operator moves control handle 2 I4 clockwise, as indicated by dotted lines in Figure 9, and thereby lowers the feeler 2I5 to the dotted position shown in Figure 11, or to whatever position the dirt or trash in the material carrying receptacle 2 causes the feeler 2|5 to be in. The operator can determine by the location of the control handle 2|4 what amount of dirt or trash is in the material carrying receptacle 2. When the feeler 2|5 is raised to the position shown by solid lines in Figure 11, the operator knows that it is time to dump the material carryinig receptacle 2.
Above the material carrying receptacle 2 is mounted the water tank or reservoir |52 which is recessed as shown in Figure 3 for the operators seat or station 1. Additional capacity is secured by having a connection between the water tank or reservoir |52 and a space |53 above the semi-circle front plate |00, front plate 2a and the side plates 6 and 1 of the material carrying receptacle 2. An overow |54 i's provided to permit the excess water to flow downward into the material carrying receptacle 2 and onto the movable bottom 94, which assists in keeping it clean.
Directly above the water tank or reservoir |52 is an additional space |51 in which the fuel tank |55 is mounted. A door |56 which acts as a cover is provided to permit the lling of the water tank or reservoir |52 and the fuel tank |55. There is also room in the space |51 to keep tools and hose connections.
On the left hand side of the sweeper a drag or deflector board |58 is suspended from the engine main frame by means of adjustable chains |59 and |60.
Attached by a U-bolt |6| to the front steering fork 2| is a plate |62 which forms a support for the front wheel deector |63. Said front wheel deflector |63 is to reduce the amount of material thrown by the gutter broom |64 and is made of iexible material such as leather or rubber, and turns With the steeringwheel 20.
Referring to Figure 12, diagonally across underlneath the engine main frame I and in front of the gutter broom |64 are suspended two sprinkler pipes |65 which are connected to the water 'pump |61. This water pump |61 is of the usual type, having relief valve |68 and connections to the water tank or reservoir |52. The amount of water desired in the sprinkler pipes |65 is controlled by the valves |66. If necessary, the valves |66 can be closed when transporting the sweeper from place to place.
The propelling power or engine 36 is mounted `on the engine main frame at the front end of the sweeper. The main drive shaft 1| of propelling power or engine 36 extends rearwardly from the clutch 32 and has bevel pinion |16 keyed or otherwise mounted thereon. The transmission 3| is mounted at right angles to the main drive shaft |1| instead of parallel, as transmissions usuauly are assembled, and has three speeds forward and one reverse. The transmission 3| has three shafts, the main transmission shaft |69, the auxiliary shaft |19 and the intermediate shaft |16, as indicated in Figure 12, which are mounted for rotation on bearings 232, which may be of any standard design. The intermediate shaft |16 has mounted thereon gears |15 and |11 and is used for reversing the direction of travel of -the sweeper.
To -propel the main transmission shaft |69, the
bevel gear |12 is mounted thereon by keys or other means and contacts bevel `pinion |19. On vthe right hand side of the main transmission shaft |69 are mounted shifting gear |13 and dual shift- -ing gear |14. By the use of gear shift lever 33, the desired speeds and direction of travelof the sweeper can be obtained.
The relative positions and mountings of the shafts |69, |19 and |16 are shown in Figure 14.
-On the auxiliary shaft |19 intermediate of the bearings 232 is mounted triple gear |13 and on the right hand end sprocket |89, On sprocket |86 is sprocket chain |3|, which contacts and drives the drive sprocket I9 mounted on propelling wheel 4. Swingably mounted-on the side plate 6 is adjustable idler 233, which contacts sprocket chain |8| to adjust and take up the wear of sprocket chain |8|.
Thus it is seen that the desired speeds and direction of travel of the vsweeper are easily-controlled by the operator by the use of gear shift lever 33.
On the left hand end of the main transmission shaft |69 is rotatably mounted a combined gear |82 and sprocket |8217, having projectionsy on the right side thereof forming a jaw clutch |82a to Vengage gear |83 which is slidably mounted on the water pump shaft |39. Gear `|68 can be thrown out of engagement by shifting the gear |83 towards the water pump |61, by means of shifting lever 229. Jaw clutch |93 is slidably mounted on the main transmission shaft |69 and has shifting lever |94 attached thereto.
Under the main transmission shaft |69 (see Fig. 19) on bearings, 232 is mounted the gutter broom drive shaft |65, which has keyed thereto at the left hand end drive sprocket |36. On the opposite, or right hand end of gutter broom drive shaft |85 (see Figure 12) is keyed bevel gear |81, which contacts and drives bevel gear |88 mounted on the auxiliary gutter broom drive shaft |89, which is mounted at right angles to gutter broom drive shaft |85, At the forward end of the auxiliary gutter broom drive shaft |89 is keyed bevel gear |69, which contacts bevel gear |9| mounted .sprocket and keyed to the upper end of gutter broom vertical shaft |92. Gutter broom |64 is mounted and keyed on .the lower end of gutter broom vertical shaft |92.
To rotate the gutter broom |64 and broom 55, the shifting lever |94 is shifted toward the center of the sweeper. |The clutch |93 will then engage the jaw clutch |8201 of the combinedgear |82 and |826, rotating sprocket |8219 and sprocket chain |95, which engages and contacts rive sprocket |86 and double sprocket 51. Thus it is seen that the speed of thegutter broom |64 and the broom 55 is independent of the speed of the sweeper or propelling wheel 4. This is desirable and important, as it is necessary to maintain a certain constant peripheral speed of the broom55 to deposit the dirt or refuse in lthe forward portion of the dirt receptacle.
To the right'of the jaw clutch |93 is rotatably mounted on main transmission shaft |69, sprocket |96 which drives sprocket v|98 of the lhydraulic pump `|99 by 'means of sprocket chain |91. The hydraulicpump '|99 is only required to supply power to the cylinder 11 to raise and lower the broom 55 and at such times it is not necessary to rotate the broom 55 or the gutter broom |64. Therefore, jaw clutch l|93 engages either the jaw clutch |82a or the sprocket |96, as desired.
In Figures l and 15, .to control the raising and lowering of the gutter broom |64, the lower end of hand lever 228 is mounted kon the outside `of the forward extended side'plate 6a at 22| and is within easy reach of the operator. The shaft housing 296 has guides 222 which determine the vertical position of the auxiliary gutter broom drive shaft |69 and shaft housing 266, as it is guided in its up and down movement by plate 56a and guide bar-223. Bell crank 224 is mounted for rotation on the upper end of guide Vbar 223 at 1225. Adjustable connecting rod 226 is attached to the hand lever 229 and bell crank 224, and shaft housing 206 is attached to the lower end of bell crank 224 by link 221 and pin 228.
Pulling the hand lever 229 toward the operator moves the bell crank 224 in a counterclockwise direction and thereby raises the gutter 'broom |64. When the gutter broom |64 and the shaft housing 266 are raised, the tension of thespring 236 pulling on the pin 228 and the bell crank 224 will hold thergutter broom |64 and the shaft housing 296 in a-raised-position until the hand lever 228 is pushed in the opposite direction, or away from the operator,
The general construction of the'gutter broom and the shafts and the raising and lowering devices lare similar to that shown anddescribed by the Wilson Patent No. 1,750,839.
It is sometimes desirable to controlftheangularity of the gutter broom |64 in relation` to the pavement to be swept and, to do so during the forward motion of the machine, we have'shown on Figure 15- a device wherebythis can bedone without the operator leaving the'operators seat or station ||1. Mounted lon lthe forward'ex.- tended side plate-Sa is a plate -266having a hole 26| .on the lower portionthereof forfthe' reception of the pin 262, to which isvmounted-ratchetglever 253 to engage ratchet'teeth 269e. The-,lower portion of ratchet lever 293 has a flat plate 264 which engages a lever 265, which-is attached-to and forms a part of the shaft housing2'96ofthe auxiliary gutter broom drive shaft |89.
4At theupperend ofthelever 295 is connected -an Veye-bolt 2|0, which projects inwardly thru ztheforward-extendedplate 6a and has a-spring to the angle of the gutter and thereby sweep it clean while the sweeper is in motion.
The operator, when seated at the operators seat or station ||1, has full control of all the movements of the sweeper and also the speed of the sweeper and it will be noted that a constant speed relation between the engine 39 and the broom 55 and gutter broom |94 is maintained irrespective of the speed of the sweeeper. This is an important factor in sweeping streets or pavements, as it is necessary t maintain a definite peripheral broom speed to deposit the material into the material carrying receptacle 2.
It is also to be noted that after the operator has been notified, by the ringing of the bell i2 (see Figures l and 12) or by adjusting the manually operated feeler 2|5 (see Figures 12 and 13), that the material carrying receptacle 2 is full, he then disengages clutch 32 and moves gear shift lever 33 to neutral position and thus stops the sweeper. I
Then he moves shifting lever |94 to dsengage jaw clutch |93 from jaw clutch |82a and engage sprocket |96, which drives the hydraulic pump |99 and closes Valve 235. Releasing clutch 32,
the engine 39 will rotate main transmission shaft |69 and start the hydraulic pump |99 and force oil thru check valve 234 and pipe or tube 23| to the front of the piston 8| of the hydraulic cylinder 11 and move said piston 8| to its farthest position, thus rotating shaft 34 and levers 36 and 31 and raising the broom 55, broom cover 69, plate |4I, deflector 44 and drag wings IIS, and at the same time rotating shaft 92 and moving the curved plate 9| and movable bottom 94 to the dumped position; thus diunping the load of refuse from the material carrying receptacle 2.
The upper cylinder head 24| has a relief valve 236 which prevents the fluid from flowing back into the oil tank 242, which is set at a desired pressure, which in most cases is approximately 1' 600 pounds. In the lower cylinder head 240 there is a by-pass 243 from the lower part of the hydraulic cylinder 11 to the pipe lines 231 and 238 to permit the fluid which may have been stored in the lower part of the hydraulic cylinder 11 to flow back into the oil tank 242. Any excess pressure, over the pressure at which the relief valve 233 operates, will cause the fluid to flow thru pipe lines 231 and 238 into the oil tank 242. The relief valve 236 is also for the purpose of permitting the hydraulic pump |99 to continue operating and the excess pressure to flow thru relief valve 236 as above described.
Check Valve 234 prevents the fluid from owing backward into the hydraulic pump |99 should the hydraulic pump |99 be stopped, and thus the pressure is maintained in the hydraulic cylinder 11 during transportation of the sweeper or until it is desired to lower the broom to contact with the pavement.
After depositing the refuse on the pavement, the operator will then disengage clutch 32 and move gear shift lever 33 to first speed position and thus move the sweeper forward over the pile of refuse which has just been deposited. He then moves shifting lever |94 to engage jaw clutch |93 with jaw clutch |82a and disengage sprocket |96. When it is desired to return the broom 55, broom cover 60, plate |4I, deector 44` and drag wings I|8 to the normal operating position, he opens valve 235, which will permit the fluid to now thru pipe 23|, thru valve 235, into pipe lines 231 and 238 and back to the oil tank 242.
From the forgoing description it can be readily seen that our invention is intended to include other forms of street sweepers which might be attached to and become a part of or be drawn by tractors or other power propelled vehicles where the power from said vehicles can be utilized for rotating the brooms, raising and lowering the rear broom, deflector, movable bottom and end and dumping the load.
Having now described and illustrated one form of our invention, it is readily seen that other combinations may be made without departing from the spirit of the invention.
1. In a street sweeper, in combination, a frame supported for movement, a material receptacle having a movable bottom and end rotatably mounted on the sides thereof mounted on said frame, a rotatable shaft projecting thru and mounted on the sides of said material receptacle, arms having their forward ends rigidly mounted on said shaft and the rear ends provided with bearings, a rotatable broom mounted in said bearings, a broom cover attached to said arms, a second pair of arms having one end rotatably mounted on said shaft and a material deflector mounted on the opposite end, means connecting said broom cover and said second pair of arms to maintain a constant relation between said material deflector and said broom, means mounted on said frame and material receptacle to raise and lower said broom, broom cover and deflector and move said movable bottom and end as one unit, an operators station on said frame, control means at said operators station to control the raising and lowering of the said broom, broom cover and deflector and the moving of said movable bottom and end.
2. In a 'street sweeper, in combination, a frame supported for movement, a material receptacle having a movable bottom and end mounted on said frame, a rotatable broom and a material defiector in constant relation with and adjustable to said broom swingably mounted on said frame, means to rotate said broom to deliver material into said material receptacle, power means mounted on said frame and material receptacle, control means t0 control said power means to synchronize the raising of the said broom and said deflector and the moving of said movable bottom and end to permit the material to be dumped from the said receptacle and the said broom to clear the dumped material during the movement of the sweeper.
3. In a street sweeper, in combination, a frame supported for movement, a material receptacle having a movable bottom and end mounted on said frame, a rotatable broom and a material deflector in constant relation with and adjustable to said broom swingably mounted on said frame, means to rotate said broom to deliver material into said material receptacle, hydraulic means mounted on said frame and material receptacle, control means to control said hydraulic means to synchronize the raising of the said broom and said deflector and the moving of said movable bottom and end to permit the material to be dumped from the said receptacle and the' said broom to clear the dumped material during the movement of the sweeperiy 4. In a street sweeper, in combination, a frame supported for movement, a material receptacle having a movable bottom and end mounted on said frame, a rotatable shaft projecting thru and mounted on the sides of the said material receptacle, arms having their forward ends rigidly mounted on said shaft and the rear ends provided with bearings, a rotatable broom mounted in said bearings, a broom cover attached to said arms, a second pair of arms having one end rotatably mounted on said shaft and a material deector mounted on the opposite end, means connecting said second pair of arms to said broom cover to maintain constant relation between said deector and the said broom, levers rigidly mounted on said shaft having connection to said movable bottom and end, a second set of levers rigidly connected to said shaft having power means connected thereto to rotate said shaft and raise said broom and material deflector and move said movable bottom and end to dump the material collected in said material receptacle.
FRED D. WILSON.
|Citing Patent||Filing date||Publication date||Applicant||Title|
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|US2631314 *||Aug 25, 1945||Mar 17, 1953||Fitzpatrick Michael F||Street sweeper|
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|US2917761 *||Mar 8, 1956||Dec 22, 1959||Henry Burgdorff||Street sweeper hopper and lift mechanism|
|US2972159 *||Jun 18, 1956||Feb 21, 1961||Tennant Co G H||Power sweeper|
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|US3837029 *||Oct 24, 1972||Sep 24, 1974||Tennant Co||Scrubbing machine|
|US4346494 *||Feb 17, 1981||Aug 31, 1982||Tennant Company||Brush structure|
|International Classification||E01H1/00, E01H1/04|