GB471472A - Improvements in or relating to springing arrangements for cycles and motor-cycles - Google Patents

Abstract

471,472. Spring frames for cycles. GETEFO GES. FUR TECHNISCHEN FORTSCHRITT. March 17, 1937, No. 7900. Convention date, March 17, 1936. [Class 136 (iii)] A spring suspension for the wheels of motor and other cycles comprises one or more rubber blocks, which are interposed between metal plates connected respectively to the wheelcarrying part and the main frame and are subjected to a shearing action under load and shocks, the metal plates moving substantially parallel to one another. In one form, Figs. 1 and 2, the wheel axle 1 is supported at each end in a slotted plate 2, which is mounted within the rear part 4 of the main frame and is connected thereto by rubber blocks 7, 8, 11, 12, secured to the metal parts by adhesive or vulcanization, the blocks absorbing vertical shocks by a shearing action. Longitudinal and transverse stresses are absorbed respectively by the blocks 7, 8 and the blocks 11, 12, the latter being secured to outwardly-bent flanges 9, 10, and being thinner than the blocks 7, 8. In the form shown in Fig. 4, each end of the wheel axle is mounted in a rocking lever 13, which is pivoted at 14 to the frame 5, 6 and is pivoted at 15 to a link 16 provided with a plate 17, between which and a plate 19 on the frame is secured a rubber block 18 acting in shear. In the case of a front fork of the type mounted on pairs of upper and lower links, the rubber block is secured between plates fixed to the fork and head respectively, its upper and lower edges being inwardly curved or recessed to facilitate the shearing displacement.