US3384253A

US3384253A - Hydraulic lifting devices

Info

Publication number: US3384253A
Application number: US592521A
Authority: US
Inventors: Robert L Wood
Original assignee: Individual
Current assignee: Individual
Priority date: 1966-11-07
Filing date: 1966-11-07
Publication date: 1968-05-21
Anticipated expiration: 1985-05-21

Description

May 21, 1968 R. L. wooo 3,384,253

HYDRAULIC LIFTING DEVICES Filed Nov. 7, 1966 5 Sheets-Sheet 1 I I v 18 INVENTQR! Roberfi Le a'lzlvLe Mood 13W 2 PMA y 1953 R. L. WOOD 3,384,253

HYDRAULIC LIFTING DEVICES Flled Nov. 7, 1966 I 3 Sheets-Sheet 2 INVENTOR;

Robert Le fh le Wood.

12W aw x Pm y 1, 1968 R. L. wooo 3,384,253

HYDRAULIC LIFTING DEVICES Filed Nov. 7, 1966 s Sheets-Sheet :s

A E 13 v Roberi Leaf h .l.e \x/ o l c i ROP Ag United States Patent 3,384,253 HYDRAULIC LIFTING DEVICES Robert L. Wood, West Terrace, Richmond, Yorkshire, England Filed Nov. 7, 1966, Ser. No. 592,521 10 Claims. (Cl. 214-501) This invention relates to hydraulic lifting devices of the type employing at least one hydraulic ram unit for tipping a vehicle or trailer body and operating a pivoted crane beam or jib.

Various types of hydraulic ram unit lifting devices are known for use in relation to road or land vehicles and such devices have included rigid, hinged and telescopic jibs or beams.

According to the present invention there is provided a hydraulic lifting device including at least one ram and cylinder unit having an axially movable mounting carrying a collar furnished with attachment means for connection to a vehicle body for tipping purposes, said movable mounting also having a carrier bracket providing a pivot means for one end of a crane beam, the unit ram being pivotally connected, or capable of connection, to the beam intermediate the beam ends and extensible from the mounting to give angular pivotal movement to the beam, and locking means to be used for locking the beam against said angular operation relative to its pivotal axis when the unit is required for body tipping purposes. The axially movable mounting may be an external tubular pillar.

The invention includes a hydraulic lifting device for use on a vehicle, including at least one ram and cylinder unit having a ram axially movable by selection either in relation to or with an external mounting in the form of a pillar, a head stock at the top of the pillar providing a horizontal pivot for a crane beam to be movable angularly in a vertical plane under the control of the said ram pivotally connected to or engaged with the beam in advance of said pivot, means for'locking the beam at will against said pivotal angular movement and/or connecting the ram to the pillar, and attachment means on the pillar normally connected to the vehicle body for tipping said body when the beam is locked against angular movement and the hydraulic unit is operated.

The invention will now be more particularly described wi'h reference to the accompanying drawing in which:

FIG. 1 is a side elevation of a vehicle with the improved hydraulic lifting device fitted thereto;

FIG. 2 is a rear view of FIGURE 1;

FIG. 3 is an enlarged detail view of the upper end of the hydraulic device;

FIG. 4 is a detail view of a modified form of mounting for the beam;

FIG. 5 is a part sectional detail view of another form of beam mounting;

FIG. 6 is a part sectional detail view showing a rotatable headstock;

FIG. 7 is a part sectional detail view of a beam with stroke limiting means;

FIG. 8 shows a beam with movable trolley for a lifting means; and

FIG. 9 is a part sectional detail elevation of a headstock provided with alternative pivot points.

In a particular embodiment a known type of telescopic ram 1 and cylinder unit 2, which is usually pivotally mounted at 3 with its hydraulic control gear 4 on the chassis 5 of a vehicle, is used for this invention and is furnished with an external tubular pillar 6. or some other form of mounting, which is capable of axial movement on the outer cylinder of the unit 2. This tubular pillar is also capable of rotation about the unit axis and any known form of means may be furnished for causing such axial 3,384,253 Patented May 21, 1968 rotation. The pillar serves as a mounting as hereinafter described.

Near its upper end the pillar 6 has a fixed flange 7 on which rests a collar 8 (preferably with an interposed thrust bearing) in which the tubular pillar is capable of rotation. This collar is adapted to be attached to a vehicle body 9 and conveniently may have one or more lugs, a flange or plate 10, with holes therein for the tie rods or other means to be attached to the collar. For example, two tie rods 11 are attached preferably to the lower part of the tipping body front wall or body framework with a central tie bracket 12 (or other means) secured to the'body head board or other part. This central tie means is secured by a withdrawable pin 17 passed through it and the lug 8a on the collar 8. It will hold the ram and cylinder unit 2 firmly upright when the body is down. Above this collar 8 is a bracket 13, forming a head stock, which is fixed to the tubular pillar 6, or to a cap which may be fixed or detachably mounted on the top of the pillar. This bracket 13 has upstanding side parts which embrace, with clearance, the crane beam 14 whose rear end is pivotally connected at 24 to a link 15 mounted on a pivot 16 in the bracket 13. This bracket also has a pair of aligned holes in the upper end of its side parts to receive a removable beam locking pin 17 when required, which will have been withdrawn from the bracket 12.

With the above arrangement the ram 1 can be extended by hydraulic pressure and thus give angular elevation to the crane beam 14 about its rear pivot 24 in a vertical plane. Preferably the vehicle body 9 is locked down on the chassis 5 during this operation. If the beam 14 is locked to the bracket 13 against such angular movement by the insertion of the locking pin 17, and the central tie bracket 12 and body 9 are released, then the tubular pillar 6 and its fitments will be raised and thus a tipping operation will be imparted to the vehicle body. The beam 14 may have means for limiting its height during angular elevation. For example, a link 18 is pivotally connected to the beam to hang pendantly and its screw threaded lower end 19 passes through bracket 13 and has a stop nut 20 for adjustment. The stop means may take some other form.

In a modified arrangement, if the beam 14 is removed, the locking pin 17 may 'be inserted through the tubular pillar 6 (or its bracket 13) to connect the ram 1 to the pillar 6 for body tipping purposes through the rods 11. In another arrangement the aforesaid bracket 13 may have one more upstanding members, say a stirrup, in advance of the axis of the ram 1 and cylinder unit 2 and carry locking means to pass through or over or otherwise engage the crane beam 14.

The hydraulic unit 2 may have additional load supporting means in the form of adjustable legs 21 (they are shown detachably or otherwise connected to the aforesaid collar 8) extensible to the ground when the crane is to be used. The legs 21 may be fitted with wheels, feet or ground gripping means.

In a modification, FIG. 4, the top 22 of the ram 1 is detachably connected to the crane beam 14, i.e. withdrawably engaged with a roller or pin 23 on the beam. The beam also has a quick release connection at its rear pivot 24 carried by bracket 13 in that the pin is withdrawable. The beam end may be hooked to engage a fixed pin.

In another arrangement FIG. 5, the beam 14 is mounted on a rearwardly disposed pivot 26 and a link 27 connects the ram 1 to the beam 14 to allow for the angular movement of the beam. The locking pin 17 in this case may be above the beam although it could pass through it.

As shown in FIG. 6 the bracket 13 may be rotatably mounted on the top of the pillar 6 so that the beam and its carrier bracket can rotate about the axis of the piston V and cylinder unit 2. The flange 6a at the top of the pillar may be fixed or detachable and a thrust bearing maybe inserted between the bracket 13 and collar 8.

FIG. 7 shows more clearly the idea of limiting means for the angular movement of the beam 14 with the beam mounted on a fixed pivot 26.

The crane beam in this instance may be a rigid one of any desiredsection including tubular, it may be twin side-by-side members, or of lattice beam construction, hinged intermediate its ends to be foldable, or telescopic. In the latter two instances hydraulic control means may be furnished for controlling extension and retraction of the beam in its length. The end of the beam may be adapted to receive an extension or other ladder which may be pivoted thereto or on a universal joint.

Preferably, the means for lifting a load comprises a pulley block unit which is detacha'bly or otherwise connected to the outer end of the beam so that a load can be lifted or lowered in relation to the beam independently of any movement of such beam. Some other lifting rope arrangement may be used. As shown in FIG. 8 the lifting means may be suspended from a movable trolley 29 which is guided along the beam 14. V

A further modified arrangement is shown in FIG. 9, wherein the headstock comprises a bracket 1311 which is off-set, in its length, from the head of the pillar 6 and is furnished with two pairs of

pivot holes

30, 31. By providing two sets of holes in this manner a beam 14 can be mounted on a pivot pin 24 in either of the top holes, or mounted on a link (or links) 15 which will have its pivot pin 16 mounted in either of the lower holes. By allowing for alternative mountings the head stock is more adaptable and if the holes are selected the leverage will be shorter, say for quick lifting of lighter loads, and if either of the holes 31 are selected it allows for greater leverage for heavier loads.

What I claim is:

1. A hydraulic lifting device on a vehicle having a tipping body, including at least one hydraulic ram and cylinder unit, a tubular pillar surrounding and pivotal about the axis of said unit, a head stock on the pillar, said head stock providing a pivotal mounting, a crane beam on said mounting, connection means between said beam and the unit ram for the ram to give the beam angular movement about its pivotal mounting, selection means for locking the beam temporarily at will to the head stock to prevent any angular movement of the beam so that it will only rise and fall with the ram, and attachment means for connecting the pillar to the tipping --body of the vehicle for the ram to tilt said body.

2. A hydraulic lifting device according to claim 1, wherein the rear end of the crane beam has a pivotal mounting comprising a link pivotally connected to the pillar head stock. 7

3. A hydraulic lifting device according to claim 1, including a. Withdrawable locking pin for securing the beam to thehead stock to prevent angular movement of the beam. I

4. A hydraulic lifting device according to claim 1, including a bracket mounted on the pillar to move there- With but in a manner that allows the pillar to have axial rotation, said bracket having tie members attached thereto and to the vehicle body so that a rising movement of the pillar through the medium of the crane beam the head stock and the ram will tilt the vehicle body. I

5. A hydraulic lifting device according to claim 1, wherein the ram and cylinder unit is pivoted at its lower end to the vehicle and detachably anchored near the cylinder upper end to the vehicle body by means attached to a bracket on the pillar. I

6. A hydraulic lifting device according to claim 1, wherein the ram is connected to the crane beam by pivoted link means to allow for angular movement of the beam about a rearwardly disposed pivot.

7. A hydraulic lifting device according to claim 1, wherein the ram is detachably engageable with means on the beam.

8. A hydraulic lifting device according to claim 1, wherein the beam carrying head stock is rotatably mounted on the pillar.

9. A hydraulic lifting device according to claim 1, wherein the beam carrying head stock has a plurality of beam pivot mounting holes in two sets on opposite ends of the head stock to provide a beam pivot selection and different degrees of leverage.

10. A. hydraulic lifting device according to claim 4, wherein ground engaging supporting legs are attached to the pillar bracket for use when the device is lifting heavy loads.

References Cited FOREIGN PATENTS 922,182. 3/1963- Great Britain. 978,765 212/1964 Great Britain.

A. J. MAKAY, Primary Examiner.

Claims

1. A HYDRAULIC LIFTING DEVICE ON A VEHICLE HAVING A TIPPING BODY, INCLUDING AT LEAST ONE HYDRAULIC RAM AND CYLINDER UNIT, A TUBULAR PILLAR SURROUNDING AND PIVOTAL ABOUT THE AXIS OF SAID UNIT, A HEAD STOCK ON THE PILLAR, SAID HEAD STOCK PROVIDING A PIVOTAL MOUNTING, A CRANE BEAM ON SAID MOUNTING, CONNECTION MEANS BETWEEN SAID BEAM AND THE UNIT RAM FOR THE RAM TO GIVE THE BEAM ANGULAR MOVEMENT ABOUT ITS PIVOTAL MOUNTING, SELECTION MEANS FOR LOCKING THE BEAM TEMPORARILY AT WILL TO THE HEAD STOCK TO PREVENT ANY ANGULAR MOVEMENT OF THE BEAM SO THAT IT WILL ONLY RISE AND FALL WITH THE RAM, AND ATTACHMENT MEANS FOR CONNECTING THE PILLAR TO THE TIPPING BODY OF THE VEHICLE FOR THE RAM TO TILT SAID BODY.