Patent GB-143287-A (GB)
Title: Improvements relating to mechanism for tipping the bodies of trailer vehicles
IPC: B60P1/14
Filed: 1919-02-07
Abstract: 143,287. Spencer, L. M. Feb. 7, 1919. Tipping-wagons. - Relates to trailer vehicles having a tipping- body actuated by mechanism on the tractor vehicle, which may also have a tipping-body, in which case the bodies may be tipped separately or together. The mechanism may comprise an hydraulic hoist driven from the propelling-engine. As shown, an hydraulic hoist 13 is mounted on the tractor vehicle, and comprises the cylinder 13 and piston-rod 16 with cross-bar 17 and pulleys 18 over which pass a pair of cables 19 attached at one end to an equalizing-bar 20 pivoted at 112, and at their other ends 21 to a pair of bars 22 fixed to the body 4 of the tractor. The body 4 is hinged to the chassis 3 at 7. A third cable 82, which may be hooked either on to the cylinder 13 or other fixed part or at 111 on to the piston-rod 16, passes over pulleys 102, 101, 100 on the tractor and trailer chassis, and a pulley 78 on a vertical guide 75 to the lower end of a bar 81, which works in the guide 75. The cable 82 has a coupling 109. Another cable 90 has one end fixed to the guide 75 at 92, passes over a pulley 88 on the bar 81, and is attached at its other end to an equalizing-bar 93. Fig. 6, connected by links 94 to arms 72 depending from the trailer body 70, which is hinged to the chassis 48 at 71. A pair of cables attached to the cross-bar 17 may be substituted for the single cable 82, and there may be a single arm on the trailer bodv for the attachment of the cable 90. The guide 75 and cylinder 13 are respectively mounted on a pair of cross-bars 73, 12 extending between the side bars 48, 3 of the chassis. The draught coupling between the vehicles is such as to prevent stress incident to the pull of the cable 82 in the tipping operation from being transmitted to the bearing-springs, and may comprise a draw-bar 44 and shackle bolts 43. The cable 82 is disposed parallel to and above the draw-bar 44. The pump 26, Fig. 8, for the hoist 13 is driven from the engine. driving-shaft 10 through a clutch 31, and is adapted to pump liquid from the upper part of the cylinder to the lower part by way of pipes 25, 28. The stroke of the hoist is limited to the desired amount by the provision of openings 33 in the upper end of the cylinder, which are uncovered by the pistor. and permit the liquid to escape into an expansion chamber 34. A valve 32 is adapted to by-pass the liquid back from the pipe 28 to pipe 25 for lower. ing the piston. When it is desired to tip the bodies 4, 70 at the same time, the cables are attached as shown, and the hoist 13 is actuated, the thrust-bar 81. on the trailer being raised by the cable 82 and thereby exerting a pull on the cable 90. If the cable 82 is detached from the hook 111 on the piston-rod 16, only the tractor body 4 is tipped, and if the cables 19 are unfastened at 21 or the equalizing-bar 20 at 112, the trailer body only is tipped. There may be more than one trailer. The tractor may have a fixed body or may not carry a body, as in the semi-trailer type in which the front end of the trailer is mounted upon the rear end of the tractor. When the trailer is disconnected, the cable 82 on the tractor may be used for operating a loading-skip or other apparatus. The hydraulic hoist may be replaced by a drum or screw hoist.