GB433764A - Improvements relating to torsional spring systems for vehicles - Google Patents

Abstract

433,764. Torsion springs; jointing. VAUXHALL MOTORS, Ltd., Kimpton Road, Luton.-(Opel Akt.-Ges., A. ; Russelsheimon-Main, Germany) March 25, 1935, No. 9239. [Class 108 (iii)] [See also Group XXII] In a torsion spring system comprising a torsion spring member and a sleeve member connected thereto at one end by a shrinking or like operation in order to reduce the forcefit pressure where the torsional stress in the spring is greatest one of the members is adapted so that the specific surface pressures between the members vary inversely as the torsion stresses induced by load. As shown in Fig. 1 the ends of a spring rod 10 are force-fitted respectively in a sleeve 11 on a bracket fixed to a vehicle and in the sleeve 14 of an arm 15 connected to a movable member such as a wheel. To reduce the torsional stress at the inner ends 24, 25 of the sleeves, the holes in the sleeves may be slightly tapered toward the ends of the rod, or the sleeves may taper in thickness away from the ends of the rod, or the diameter of the rod may be greater at its ends than at the parts opposite the inner edges of the sleeves. The pressure required for connecting the rod and the sleeves may be reduced by interposing therebetween a film of oil or other fatty substance which, when the members are heated, is coked or cracked, forming a solid product of combustion. Additional means such as serrations, keys, welds, &c., may be used for securing the rod and sleeves. One method of assembling a torsion spring system is described in detail, dimensions, pressures, and temperatures being given.