GB490463A - Improvements in motor vehicles for travelling over open country - Google Patents

Abstract

490,463. Endless - track vehicles. ZAVODY TATRA AKCIOVA SPOLECNOST PRO STAVBU AUTOMOBILU A ZELEZNICNICH VOZU. Jan. 12, 1937, No. 900. Convention date, March 11, 1936. [Class 79 (i)] A vehicle for travelling across country and having two pairs of rear driving wheels is provided with endless tracks 15 alongside the rear wheels, the tracks passing over drums 14, 14<1> carried by frames 12 adapted to be raised and lowered relatively to the ground. Thus, when the vehicle is travelling on soft ground the tracks can be lowered to assist in supporting and driving the vehicle, the drums 14<1> being driven so as to drive the tracks at the same peripheral speed as the road wheels. In the construction shown the track frames 12 are connected by lifting devices 11 to a cross member 9 of the central vehicle frame 1, and are provided with brackets 13, 13<1> for the idler and driving drums 14, 14<1>. Track rollers 20 are mounted on the frames 12, and the upper run of the track is supported by rollers 18 controlled by a spring 19. The drums 14<1> are driven through gearing enclosed in jointed casings 16, 17 from a transverse shaft in a gear-box 6, this shaft being driven as described in Specification 490,469. The cross member 9 serves for the support of the vehicle springs 10. The road wheels are mounted on axles 2a, 3a, 4a connected, preferably oscillatably, to the axle casings 2, 3, 4, which together with a casing 5 comprise the vehicle frame. The engine 7 and changespeed gear 8 are connected to the casing 5 by means of a casing 6, as described in Specification 490,462 so that the engine and other parts can be mounted in various positions relatively to the main frame.