US1572876A - Dump truck - Google Patents

Description

1,572,876 P. E. BARKER DUMP TRUCK Feb. 16 1926.

Filed Sept 14, 1921 s Sheets-Sheet 1 1N VEN TOR @WL 11, V 9

dTTFZS' Feb. 16 1926.

P. E. BARKER DUMP TRUCK Filed Sept. 14, 1921 3 Sheets-Sheet 2 Feb. 16 1926.

- P. E. BARKER DUMP TRUCK 3 Sheets-Sheet 5 3E Filed Sept. 14, 1921 Patented Feh. it 192-6.

UNIT-ED STATES PATENT OFFICE."

PERCY E. BARKER, 0F CLEVELAND, OHIO, ASSIGNOR TO THE VAN DORN IRON WORKS COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

DUMP TRUCK.

Application filed September 14, 1921. Serial No. 500,621.

To (ZZZ whom it may concern:

Be it known that I, PERCY E. BARKER, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Dump Trucks, of which the following is a specification.

This invention relates to improvements in hoisting mechanism for dump trucks.

Th objects of this invention are to provide an improved hoisting mechanism for dump trucks in which the truck body has positive connection with the hoisting mechanism and without the use of a cable for raising and lowering the bony; to so arrange the hoisting mechanism that the load will be evenly distributed to the different parts of the same and thereby increase its efficiency and lengthen its life; to provide-the hoisting mechanism as a unit that can be mounted upon any standard truck chassis; to provide also means for automatically stopping the hoisting mechanism at the upper and lower limits of travel of the truck body.

Other objects of the invention will appear from the following description and claims when considered together with the accompanying drawings.

Fig. 1 is a side elevation, partly broken away, of my improved dump truck; Fig. 2 is a front end elevation of the operating connections; Fig. 8 is a longitudinal section through the center line of F 4t and shows the operating connections to the hoisting mechanism; Fig. 4 is a view, partly in plan and partly broken away, of the casin which encloses the operating mechanism; Fig. 5 is an enlarged elevation, partly broken away, of the hoisting mechanism assembled as a unit; and Fig. (5 is a plan view of the same.

In the general view of my invention as illustrated in Fig. 1 the chassis is indicated by reference numeral 1, the hood by reference numeral 2, and the swinging truck body by the reference numeral o, it being uiuilerstood that the hoisting mechanism might be operated by a suitable connect-firm from the engine of the truer or other source of power. The hoisting mechanism which, as illustrated in Figs. 5 and 6, is assembled as a unit and applied as such to the chassis of the truck, is mounted upon the channel bars 4 and 5 which are secured to the chassis by means of the brackets 6. The bars 4.

and 5 extend from the back of the drivers. seat to a point near the rear end'of the chassis, as seen in Fig. 1, and the front brackets 6 extend upwardly beyond the chassis along the sides of the under-frame of the truck body. These channel bars are braced by means of the angle bars 7, Sand 9 which are securedto the lower webs thereof by means of the plates 7, 8and 9. The tie rod 10- extends through the main walls of the channel bars 4 and 5. F ill'ers of wood are provided along the upper and lower sides of the top and bottom flanges of the channel bars 1 and 5, as indicated at 1.1, and are secured thereto in any suitable manner as for instance by means of bolts or the like. The casing, indicated. in a general way at 12, encloses the operating mechanism for raising and lowering thetruck body and is afforded support at its forward portionby means of the brace bar 9. As indicated in Fig. 3, the rear middle portionof the casing 12 is provided with a recess in its under face to allow clearance for the differential of the drive-mechanism of thetruck. As above stated, any suitable source of power may be employed for driving the shaft 14 and in the present case the sprocket 15 is shown as being mounted upon the front end of the shaft 1% for operation by a chain which in turn may be driven from the engine of the truck.

Splined upon the shaft 14 is the clutch member 16 whichis adapted to be slid into and out of clutching engagement with the companion clutch members 17 and 18 which are fixed upon the shaft 14. The clutch member 17 carries thegear 19 which meshes with the gear 20 fixed upon the shaft 21 extending through the casing. and which a so carries the worm 22 meshing with the worm gear 23. Pinion gears 23 mounted upon the shaft 24; mesh in turn with two Sears 25 keyed to sleeves 27 carrying pinions 27 and mounted on shaft 26 upon the opposite ends thereof. These two pinions 27 mesh with the gears 28 which are fixed upon he aligned but separate shafts 29. The shafts 29 have bearing support at their outer ends in the bearing blocks 30. mounted upon the inside of the channel bars a and 5 as part of the drive mechanism unit. Fig. 4c shows only one-half of the mechanism enclosed within the casing, but it will be understood that the structure of the pinions 27, the two no I .of.- The clutch 16 is controlled by means" indicated at 45.

shafts'29 and the gears fcarried thereby as well as the bearingstherefor are alike. The purpose of this particular arrangement of aligned, separate shafts will appear later.

The cover plate 32 is provided for the opening through the top of the casing12 and other suitable openings are also provided to permit access to the inside thereof. It will be understood that suitable means of mounting the severalgears and shafts within the their other ends to turn on a suitable shaft 35 mounted in the under-frame 36 of the truck body. As clearly shown in the drawings, the lever 34 has an angular form, the .upper end portion 34? extending at approxi mately 90 to the truck body throughout practically all stages of the hoisting and lowering operations. I

lVith this arrangement, operation of the shaft 29 causes a swinging upward movement of the truck body which is pivotally mounted at 37 in the bearing supports 38 fixed to the inside of the main walls of the channel bars 4 and 5, at the rear ends thereof the yoke member 10 carried by the rod which is reciprocated back and forth by means of its connection 42 with the operat ing rod 43 which in turn has sliding movement through the casing. This clutch control mechanism is actuated by the operator from the front end thereof by any suitable lever connection, as for instance The rod 43 carries a stop member 46 which isadapted to be engaged by the companion trip members 47 carried upon one face of the gear 28. This particular mechanism is for the purpose of automatically shifting the clutch member 16 from engagement with either of the companion- clutch members 17, or 18 into neutral position so as to automatically stop the swinging movement of the truck body when .it. has reached its upper or lower limit of movement. The clutch member 16 is shown in Fig. 3 as occupying neutral position.

When theclutch member 16 is moved into engagement with the clutch member 18 the pinion 50 carried thereby is set into operation andtransmits its motion to the mes.h-. ingpinion 51 which in turn drives the mesh- ,ing pinion52 fixed upon the shaft 21. It will be understood that the additional or intermediatepinion in this particular gear combination effects a reversal of the direction of operation of the shaft 21 from that which is obtained when the drive is through the pinions 19 and 20. Thus it will be clear that the engagement of the clutch member 16 with the clutch members 17 and 18 will effectdriving of the shaft 21 in either one direction or the other.

From the above it will be seen that in order to raise the truck body the operator will actuate the lever 45 in the proper direction to bring the clutch member 16 into engagement with clutch member 17, whereupon the shafts-29 are set into operation. The'crank arms 33 then move about the axis of the shafts 29 and the truck body is raised to the position of approximately 45 to the horizontal, as indicated in dotted lines in Figs. 1 and 5, the truck body being pivoted at a point near its rear end. The operator may disconnect the clutch at any time bv means of the lever 45 so as to stop the raising movement of the truck body or he may depend upon the means for auton'iatically throwing the clutch member 16 into neutral position to thereby stop the swinging movement. When it is desired to lower the truck body, the clutch member 16 is moved into en a ement with the other com ianion clutch t: in

member so as to operate the shafts 29 and cause the le er arms and 3st to fold below the same, as illustrated in full lines in Figs. 1 and 5. The operator may at any time throw the clutch into neutral position so as to stop the truck body at any degree of inclination desired or he may depend upon the automatic means for throwing out thecluteh at its lower limit of movement.

\Vith the present structure, the hoisting mechanism is assembled as a unit and the particular form of hoisting mechanism including the folding levers constributes to the compactness, simplicity and efl'iciency of the device. provision of aligned shafts, with separate lever connections to the truck body, which arrangement distributes the load to both sets of levers and precludes the possibility of one set of levers carrying the entire load as might otherwise be the case.

Other advantages flowing from this in- 'vention will readily suggest themselves to those who are familiar with the art to which it relates.

lVhat I claim is:

1. Dumping apparatus comprising a supporting frame, a dumping body mountedon said frame for raising and lowering movement, and hoisting means comprising separate sets of lever mechanism, an operating connection for each set of lever mechanism, and a single operating means for said operating'conneetions for said lever n'icelianisms, said parts being so constructed and arranged Another advantage resides in the IOU that the separate sets of lever mechanism are individually responsive to the load.

2. Dumping apparatus comprising a supporting frame, a dumping body mounted on said frame for raising and lowering movement, and hoisting means comprising separate sets of lever mechanism, shafts individually responsive to the load for operating said lever mechanisms, a driving connection for each of said shafts, and means for operating said driving connections to thereby operate said lever mechanisms 3. Dumping apparatus comprising a supporting frame, a dumping body mounted on said frame for raising and lowering movement, and hoisting means comprising separate sets of lever mechanism arranged on opposite sides of the longitudinal middle line of the dumping body for operating said body, shafts individually responsive to the load for operating said lever mechanism-s,

a driving connection for each of said shafts,

and means for operating said driving con nections to thereby operate sald lever mechanisms.

4L. Dumping apparatus comprising a supporting frame, a dumping body mounted on said frame for raising and lowering movement, and hoisting means comprising aligned shafts mounted in said frame and having their adjacent ends free, separate sets of lever mechanism connecting said shafts and dumping body, a driving connection for each of said shafts and means for simultaneously operating said driving connections to thereby operate said lever mechamsms.

5. In a device of the class described, hoisting mechanism comprising duplicate aligned shafts having their adjacent ends free, duplicate sets of lever mechanism con nected at one end to the outer end portions of said shafts, duplicate driving connections for said shafts, and means for simultaneously operating said driving connections so as to operate said lever mechanism.

In testimony whereof I hereby affix my signature.

PERCY E. BARKER.

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