GB2234205A

GB2234205A - Tipping trailer

Info

Publication number: GB2234205A
Application number: GB8923563A
Authority: GB
Inventors: John Bernard Lloyd Craske
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-10-19
Filing date: 1989-10-19
Publication date: 1991-01-30
Anticipated expiration: 2009-10-19
Also published as: GB8923563D0; GB2234205B

Abstract

A tipping trailer (10) has a load carrying body (11) mounted to tip about a transverse axis (12) on a chassis, between a normal position and a tipped position in which the front of the body is raised to discharge a load from the rear of the body. Tipping is effected by movement of a drawbar (22), longitudinally slidable on the chassis, the drawbar being pivotally connected to the front end of a strut (26), the other end of the strut being pivotally connected to a member (29) extending downwardly from the body. The line of action joining the pivots at the ends of the strut is above but nearer to a line through the front pivot of the strut and the transverse tipping axis than if the same strut were pivoted at the rear direct to the body without the downwardly extending member. <IMAGE>

Description

Tipping Trailers lhis invention relates to tipping trailers and is an improvement on the type of tipping trailer described in t.K.

Patent specification 1308448.

According to the present invention, there is provided a tipping trailer comprising a chassis supported on ground engaging wheels, a body pivotable about a transverse axis on the chassis between a normal position and a tipped position, a drawbar longitudinally slidable fore-and-aft on said chassis, and a strut pivotted at the front end to the drawbar and at the rear end to a member rigidly attached to or forming part of the body and extending downwardly therefrom, so as to bring the line of action joining the pivots at the ends of the strut above but nearer to a line through the front pivot of the strut and said transverse tipping axis of the body, than if the same strut were pivotted at the rear direct to the body without said member.

Preferably the transverse tipping axis is higher from the ground than the pivot of the strut to said member, when the body is in the-normal position.

Cne embodiment of the invention is described, by way of example only, with reference to the accompanying drawings, in which: Figure 1 is a side elevation of a tipping trailer according to the invention, and Figure 2 is a perspective view of part of a chassis of the trailer shown in Figure 1.

In the drawings, a trailer 10 has a load carrying body 11, mounted to tip about a transverse axis 12 on a chassis 13, between a normal position, as shown in Figure 1, and a tipped position, in which the front of the body 11 is raised to discharge load from the right hand (rear) end of the body in Figure 1.

lhe chassis 13 is typically made of tubular, channel or angle-section steel and has a rectangular upper frame 14 at the' rear of which the body 11 is pivoted thereto about the axis 12. lhe frame 14 carries elastomeric buffers 15 at the front, to cushion the return of the body 11 to the normal position.

From the front corners of the frame 14 a pair of members 16 are inclined inwardly and downwardly to locate a pair of parallel inwardly-facing channels 17. A transverse axle lE, having ground-engaging wheels 19, is joined to the frame 14 by a pair of pillars 20, (which may include box springs and sliding pins 21) at the rear of the channels 17, and at the front of the channels 17 by a pair of convergent members 21.

A tubular drawbar 22 has a normal tractor connection 23 at the front end. lhe rear end of the drawbar 22 is slidable in the channels 17, being aided by a pair of vertical rollers 24 and a pair of horizontal rollers 25 on each side.

A strut 26, comprises a pair of curved members, one each side of the drawbar 22. Ihe strut 26 is pivotted about a transverse axis 27 to the drawbar 22, and at a higher level about a transverse axis 28 to a bracket or member 29, fastened to or integral with the underside of the body 11.

lhe body 11 is tipped by use of a hand brake lever 30 to apply the brakes on the wheels 19. Ihe tractor is then backed, which pushes the drawbar 22 back inside the channels 17. Since the line through the strut axes 27,28 is above the line through the axes 12,27, the strut 26 will cause the body 11 to tip backwards about the axis 12. Ihe lowering of the axis 28 by the member 29 ensures that a given angle of tipping of the body 11 is achieved with less rearward movement of the drawbar 22 into the channels 17. lhe body can be locked at various angles of tip by a peg in a quadrant 31, or by a ratchet device.

Claims

1. A tipping trailer comprising a chassis supported on ground engaging wheels, a body pivotable about a transverse axis on the chassis between a normal position and a tipped position, a drawbar longitudinally slidable fore-and-aft on said chassis, and a strut pivotted at the front end to the drawbar and at the rear end to a member rigidly attached to or forming part of the body and extending downwardly therefrom, so as to bring the line of action joining the pivots at the ends of the strut above but nearer to a line through the front pivot of the strut and said transverse tipping axis of the body, than if the same strut were pivotted at the rear direct to the body without said member.

2. A tipping trailer according to claim 1, wherein the transverse tipping axis is higher from the ground than the pivot of the strut to said member, when the body is in the normal position.

3. A tipping trailer according to claim 1 or 2, wherein each strut is curved in its longitudinal direction.

4. A tipping trailer according to any preceding claim, wherein said strut comprises a pair of elongate curved members each arranged adjacent a respective side of said drawbar.

5. A tipping trailer substantially as described herein with reference to the accompanying drawings.