US1312489A - Planoohaph cik - Google Patents

Description

W. S. UVENGOOD.

TRUCK HOIST.

APPLICATION FILED IIAY 28. l9t8. 1,312,489. Pamnted Aug. 5,1919.

3 SHEETSSHEET l.

INVENTOR BY h/meld/wwyod "In I A TTORNE Y W. S. LIVENGOOD.

TRUCK HOlST.

AHLICAHON HLED MAY 28,19l8.

Patented Aug. 5, 1919.

3 SH EETS-SHEET 2.

INVENTOR M'nf/ek/fi. Live/you B V 04 A TTORNE V W] TNESSES THE COLUMBIA PLANnnRAFu 11.. WASHlNlITON. n. c.

W. S. LIVENGOOD.

TRUCK HOlST.

APPLICATION FILED MAY 2a, 1918.

Patented Aug. 5, 1919.

3 SHEETSSHEET 3.

I4 TTORNE 1" 'r n COLUMBIA PL unloading of UNITED STATES PATENT OFFICE.

WINFIELD S. LIVENGOOD, OF KANSAS CITY, MISSOURI, ASSIGNOB 'IO- ANDREW A. KRAMER, OF KANSAS CITY, MISSOURI.

TRUCK-HOIST.

Specification of Letters Patent.

Patented Aug. 5, 1919.

To all whom it may concern: Be it known that I, WINFIELD S. Livestcooo, acitizen of the United States, residing at Kansas City, in the county of Jackssn and State of Missouri, have invented certagn new and useful Improvements in True;- Hoists; and I do declare the following to she a full, clear, and exact description of e invention, such as will enable others sk L d in the art to which it appertains to make and and use the same, reference being had tc the accompanying drawings, and to the 1stters and figures of reference marked therein, which form a part of this specification.

My invention relates to dump trucks azgd more particularly to a hoist whereby a trugk body may be actuated on a pivotal mougiting to an inclined position to facilitate tie material therefrom; the pricipal object of the invention being to p: vide a manually operated hoist of this ch: acter wherein the hoisting mechanism isgso arranged that a minimum amount of space will be utilized for the hoist.

A further object of the invention is i to provide a hoist comprising pivotally monited standards and means whereby they are normally retained perpendicularly to ihe truck frame but are allowed to move so as to practically retain a perpendicular celation to the truck body as the latter mOfBS to and from an inclined sition and reliefve the standards of the ateral strain tit would result if they were fixed perfec ily rigid on the truck frame.

A still further object of the invention ;is to provide a latch mechanism whereby file hoist parts may be locked to hold the truzk body at any suspended position and corsaprising a brake shoe that may be moved an releasing the latch to cause a braking effect and thereby ease the lowering of the tru :k body to loading or normal osition.

In accomplishing these ob ects, I have provided improved details of structure, the preferred forms of which are illustrated in the accompanying drawings, wherein:

Figure I is a side elevation of a truck equipped with a hoist constructed according to the present invention.

Fig. II is a front view of the hoist mechamsm.

Fig. III is a back view f the same, parts being broken away and in section for better illustrating the hoist gearing.

Fig. IV is a transverse vertical section of the same on the line IV--IV, Fig. III.

Fig. V is an enlarged sectional view illustrating the fastening and winding of the cable on the hoisting drum.

Fig. VI is an enlarged detail view, partly in section illustrating the hinged mounting of the lower end of the hoist frame and one of the springs for yieldingly retaining the same in upright position.

Fig. VII is an enlarged side view of the hoist, the ratchet lock and brake mechanism.

Fig. VIII is a sectional view of the same parts, illustrating the brake shoe.

Fig. IX illustrates a type of hoist frame used for a single cable device.

Referring more in detail to the drawings:

1 designates an automobile truck of any ordinary type of construction, having a chassis comprising longitudinally extending, s aced side beams 2-2 whereon, at opposite points at the rear of the chassis, bearing members 3 are fixed; the latter are adapted to receive trunnions 4: extending from adjacent the rearward ends of a truck frame 5 whereon a truck bed 6 is mounted so that the said frame and bed may be moved, in a pivotal manner to an inclined position and material within the bed may be delivered from the rear end thereof.

The truck bed 6 terminates a short distance from the vehicle seat 7, and intermediate the seat and bed, a hoist mechanism constructed according to the resent invention, is mounted; the latter being supported centrally between the side beams 2-2 by a pair of inwardly facing angle beams 8-8 mounted transversely across the frame and resting at their opposite ends on blocks 99 which in turn are fixed on the side rails 22' by means of U-bolts 10 that inclose the ends of the blocks and are extended about the said beams and through the ends of anchor plates 11 and are equipped with nuts 12 which may be tightened against the plates to hold the blocks securely in place on the frame.

Fixed within the angle members 8 8 is the hoist frame, the same comprising spaced, vertically extending standards 15-15" which form the sides of the hoist frame and at their upper ends support [he opposite ends of a transverse shaft 16, whereon spaced sheave wheels 17-47 are revolubly mounted. The hoist frame is normally retained in this vertical position by means of a pair of coil springs 1818 which are mounted about bolts 1919 fixed pivotally at their lower ends in apertures 20 in the blocks 99 and extended upwardly between the ends of the beams 88; the said springs hear at their upper ends against washers 21 seated against the heads 22 at the upper ends of the bolts and at their lower ends bear against plates 23 extending between and fixed to the ends of the beams 8-8; the plates being provided with apertures 24 through which the bolts may extend.

ldith this arrangement it is apparent that the bolts 18-18 will hold the frame in functional position and that the 1])1'CSSL11'0 of the two coil springs will yielding y hold the same substantially in vertical position but will allow it to move pivotally on the corner of the forward angle 8 the truck body is raised, so that the direction of pull on the hoisting cables, as is presently described will always be parallel to the frame standards 1515.

Fixed to opposite sides and lower ends of the standards 15-15 and extending therebetween are plates 26 and 26 and supported thereby, centrally between the said standards is a shaft 27 w-hereon a large gear wheel 28 is revolubly mounted; the said gear-wheel has a windin drum '29 formed integrally on one side thereof whereon cable sections 30 and 31 are wound, the sections being extended from the drums upwardly over the sheave wheels 17 17 and then downwardly and at their ends are fixed to links 312 at the ends of brackets 33 mounted on the under side and adjacent the forward end of the truck bed 6.

The winding drum 29 comprises a hub portion 34 and spaced drum flanges 35-36 37 forming intermediate guideways 38-3-9 wherein the cables are wound and which are spaced only at such distance from each other that the ideways 38 and 39 will be of practically 1%; same width as the thickness of the cable sections used, so that, when the latter are wound on the drum, the coils will be formed one upon the other and an even windin will result; it is apparent that b this met 0d, even winding is accomplished and a greater leverage is reflected, at the start of a lifting operation, when the greatest weight is placed on the cables and a quicker raising movement is effected after the load has been lifted to such an incline that the weight on the cables is appreciably lessened.

In order to fasten the cable sections to the drum, the central guide flange 86' is provided with a, slot 40 (Fig. V), extending from the edge thereof to a point adjacent the hub of the drum, wherein the cable is seated with the opposite ends of the cable extending into the guideways at opposite sides of the flange. The hub is also built up at the side of the slot, as at 41, in the direction of winding so that the second winding of the cable will be carried evenly to the upper edge of the first winding and when car ricd thereon no unevenness will result.

Supported between the side plates 26 and 26 below the periphery of the gear wheel 28 is a shaft 45 whereon a gear )inion 46 and a larger bevel gear wheel 47, mod relative to each other, are revolubly-mounted; the gear pinion is adapted to travel in mesh with the gear wheel 28 while the Wheel 47 operates in an overlapped relation thereto.

Mounted on the outer side of the standard 15 is a shaft bearing 50 and extending revolubly thercthrough and through the standard in perpendicular relation to the shaft i5 is a shaft 52 having a bevel pinion 53 fixed on its inner end which is adapted to operate in mesh with the bevel gear wheel 17 the outer end of the shaft is extended beyond the side of the frame and is provided with removable crank 54 whereby it may be revolved to actuate the drum wheel to wind or unwind the cables to raise or lower the rear ends of the truck bed frame.

Fixed on the shaft 52 adjacent the bearing 50 is a drum 55 provided with a toothed ratchet surface 56 and at opposite sides with brake surfaces, and pivotally mounted on a pin 57 extending from the bearing member 50 above the shaft 52 is a latch 59 provided at one side with an actuating handle and a tooth 60 which is adapted, on movement of the latch in one direction, to engage the ratchet teeth to check the unwinding of the cables from the drums and at its opposite side has a brake shoe 61 adapted when the latch. is moved to its opposite limit to seat against the surface of the drum to effect a brakin operation when the body is being lowered from dumping position; the latch tooth and brake shoe are in such relation that when the tooth is in locked relation the shoe is free from the drum and when the shoe is moved to engage the drum, the tooth is freed from the ratchet, but the latch handle is of such weight, or a spring may be attached thereto, so that the tooth is yieldingly retained at all times in contact with the ratchet wheel.

At its outer end the latch has an outwardly extended handle 63 whereby it may be moved from side to side to control movement of the drum as desired.

In Fig. IX, I have shown a style of hoist frame used when a single hoisting cable is employed. The frame standards 51%1 are here drawn together at their ends and carry a single sheave wheel about which the hoisting cable operates.

Assuming that the hoist is so constructed and mounted and that the cable is fixed to the drum and extended over the sheave wheels and then downwardly and attached at its ends to the brackets beneath the truck frame, if it is desired to move the truck body to dumping position, the operator, by means of the crank 54, revolves the shaft 5 which, through the bevel gears and pinion, revolves the large drum wheel 28 and the cable sections are wound on their respective drums and the rear end of the body is raised ac-' cordingly. It is apparent that as the end of the truck body moves upwardly, the hoist frame will pivot on its mounting so that its upper end moves rearwardly under tension of the hoisting cables so that the weight of the body is applied directly longitudinally of th standards and no lateral strain is thrown thereon.

When the body has been raised, it may be locked in this position by moving the latch tooth to locking relation with the ratchet surface. When it is desired to lower the body the latch is moved to its opposite limit and by pressure thereon the brake shoe will be pressed against the drum surface to regulate the speed of unwinding of the cables.

It is apparent that by so constructing the hoist, a very compact arrangement is provided and a minimum amount of space is necessary for its operation; it is also apparent that control of the operating parts is effected through the brake and ratchet parts and the truck bed may be locked at a raised position and lowered under control of the brake to avoid unnecessary jar or damage to the parts.

While I have shown and described the hoist mechanism in combination with a vehicle frame and bed, it is apparent that hoisting mechanism of this construction could be used for various other purposes without departing from the spirit of the invention:

Having thus described my invention, what I claim as new therein and desire to secure by Letters-Patent, is:

1. The combination with a vehicle frame, and a vehicle bed havin one end pivotally mounted on the frame, of a vertically swinging hoisting device, the base of which is resillently connected to the frame, adjacent to the free end of the bed, and means operating over the upper end of the hoisting device for raising and lowering the bed on its pivoted mounting, the holstin device having swin ing movement tower the bed when the e end thereof is raised and swinging movement awa from the bed when the free end of the be is lowered.

2. The combination with a vehicle frame, and a vehicle bed havin one end pivotally mounted on the frame, 0 a vertically swinging hoist frame on the vehicle frame, springs connected to the vehicle frame and bearing upon the base of the hoist frame to yield ingly support it in a vertical position, and means carried by the hoist frame and connected to the bed to raise and lower the free end thereof.

3. The combination with a vehicle frame, and a, vehicle bed having one end pivotally mounted on the frame, of a vertically swinging hoist frame on the vehicle frame, springs connected to the vehicle frame and hear ing upon the base of the hoist frame to yieldingly su port it in a vertical position, Winding mechanism carried by the hoist frame, and cables connected to the winding mechanism and to the bed to raise and lower the free end thereof, the hoist frame having movement in the direction of the bed when the free end is raised and retractive movement to a vertical position when the free end of the bed is lowered.

4. The combination with a vehicle frame, and a vehicle bed having one end pivotally mounted on the frame, of a vertically disposed hoist frame on the vehicle frame and having projections extending from opposite ed es of the base, means for fastening the hoist frame to'the vehicle frame, said means consisting of springs bearing upon the projections and devices loosely connecting the springs to the vehicle frame, and operating mechanism carried by the hoisting frame :23 connected to the free end of the pivoted 5. The combination with a frame comprising longitudinally extending side beams and a bed having one end pivotally mounted on said frame, of a hoisting device comprising a frame having a base member seated at its opposite ends on said side beams, bolts fixed at their lower ends in said beams and extending upwardly through and beyond the base member and having heads at their upper ends, springs mounted about said bolts and adapted to bear against said base member and bolt heads to retain the hoist frame yieldably in vertical position, and means operating over the upper end of the hoist for raising or lowering the bed on its pivotal mounting.

6. The combination of the vehicle frame comprising spaced side beams, a vehicle bed pivotally mounted at one end on the said beams, a vertically disposed hoist frame ivotally supported transversely on the.

rame adjacent to the free end of the bed, sheave wheels mounted at the upper end of said hoist frame, a winding drum revolubly mounted within the frame, windin mechanism operatively connected with the winding drum and extending to the side of the ve icle frame, cables extending over said sheave wheels and fixed at their opposite ends to the vehicle body and to the winding drum, yieldable members fixed to the frame beams for normally retaining the hoist frame in vertical position and for yieldingl permittin pivotal movementthereof accor in 1y as t e vehicle body is raised.

The combination with a vehicle frame comprisin longitudinally extending side beams an a vehicle body pivotall mounted at one end on said side beams and reely suported at its opposite end, of a hoist frame ocated adjacent the free end of the bed comprising base beams supported at their ends on the frame side beams, s aced standards, mounted vertically on sai base beams sheave Wheels mounted at the upper ends of said standards, connecting plates secured to opposite faces of said standards, a shaft supported by said plates between the standards, a ear wheel revolubiy mounted on said sha t and having a winding drum fixed thereon, cables extending over said sheave wheels and fixed at their opposite ends to the free end of the vehicle body and to the winding drum, a winding shaft mounted in one of the standards extending to the side of the vehicle frame and having eared connection with the drum gear whee and operable to actuate the drum to wind the cables thereon and yieldable members having fixed relation to the vehicle frame bearin against the hoist base beams to retain t e hoist frame normally in vertical position and permitting a rearward pivotal movement of the upper ends of the standards according to the pivotal movement of the vehicle body.

eomprism 8. The combination with a vehicle frame longitudinally extending side beams, an a vehicle body ivotally mounted at one end of said side beams and freely supported at its opposite ends, of a hoist frame pivotally mounted on the vehicle frame comprising base plates, standards mounted vertical y in spaced relation on the base plates, a transverse shaft mounted at the upper ends of said standards, sheave wheels revolubly mounted on the said shaft, face plates fixed to the opposite sides of standards and extending therebetween, a shaft mounted by said face plates centrally between the standards, a geared wheel re volubly mounted on said shaft, a windin drum fixed concentrically to said gear whee cables extending over said sheave Wheels and fixed at their opposite ends to the free end of said vehicle body and to said windin drum, a second shaft mounted between plates, a beveled gear wheel revolubly mounted on the second shaft, a gear pinion fixed concentrically to the bevel ear wheel and operating in mesh with the rum gear Wheel, a shaft extended through one of the standards, a bevel gear wheel fixed to the inner end of said shaft operating in mesh with the first named bevel gear wheel, a crank at the outer end of the shaft, yieldable members fixed to the vehicle frame and bearing against the hoist base beams to retain the frame in vertical position and to allow it to pivot according to the upward movement of the vehicle body about its pivotal point.

In testimony whereof I afiix my signature.

VVINFIELD S. LIVENGOOD.

00p! of fllll patent my be obtained to: in cents each, by addresling the Gunminioner o1 Patents, wllhlnl'tol, D. 0."

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