GB792533A - Improvements in and relating to a shock absorber for vehicles - Google Patents

Abstract

792,533. Friction - type - shock - absorbers. GAUDIN, C., SECHAUD, R. F., and RITZ SOC. ANON.. A. Feb. 13, 1956 [Feb. 14, 1955], No. 4396/56. Class 108(3) The invention relates to a vehicle shock absorber comprising a brake drum 1 coaxially rigid with a cam 2 and movable relatively to a member 4 carrying a plurality of rocking brake shoes 7, and respective thrust transmitting levers 8 operatively connecting each shoe 7 with the cam 2. According to the invention, a sleeve 12 of precompressed elastic material is fitted over each pivot of the respective lever 8, and is disposed inside a bore in the body of the lever. As shown, the member 4 comprises a back plate which is bolted at 5 to the vehicle chassis, and the drum 1 is rigid with an arm 1a conneted to the axle. A pin 3 rigid with the drum 1 is journalled in the plate 4. There are two brake shoes 7 pivotally mounted on a respective pin 6 rigid with the plate 4. Each lever 8 is mounted on a respective pin 10 rigid with the plate 4, through the intermediary of a precompressed rubber bush 12. One end of each lever 8 carries a roller 9 bearing on the cam 2, and the other end has a flat surface 11. The latter bears on the flattened surface of a pin 13 (Fig. 4, not shown) which is mounted in apertures provided in the respective brake shoes 7. The pin 13 is removable through a hole 19 in the drum 1, but has a bevelled edge at one end to provide a lead during insertion in the hole 19. In a modified construction (Figs. 5 to 7, not shown), the plate 4, instead of being bolted to the chassis, is rigid with a second arm 1a. The inner ends of the pins 10 instead of being unsupported, are connected by a link. The brake shoes 7 have a common pivot, and extend over an arc of 180 degrees.