GB191313448A - Improvements in or relating to Motor and other Vehicles. - Google Patents

Abstract

13,448. Mutti, A. June 10. Springs, arrangement of and mounting bodies on.- In spring suspensions for motor and other vehicles wherein the action of the resilient devices is magnified and means are provided for altering the leverage at which the said devices act, auxiliary springs are used to prevent excessive oscillation. Fig. 1 shows a .bell-crank lever 7, pivoted to the body and having its long arm connected to the axle. The shorter arm 9 is connected to a piston-rod 20 having a piston 12 acting on a spring 13 in a cylinder 14 which is pivoted to the vehicle body at 15. The arm 9 is screw-threaded and passes through a sleeve 18 pivoted to the piston-rod 20. A nut 17, having two sets of ratchet t eth, works on the screwed arm 9 and, by engagement with one or other of two stops 22 carried by an arm 23 on the cylinder 14, automatically varies the leverage should displacement in either direction be excessive. A comparatively weak auxiliary spring 24 is arranged within the cylinder between two plates 24<a>, 24<c>. The plate 24<a> rests against a key 24<b> passing through a slot in the piston-rod 20, and the plate 24<c> normally rests against shoulders 24<d> on rods 24<e> arranged as shown, so that oscillation in either direction results in the spring 24 being compressed. A modification is described in which the lever is straight instead of cranked, the other arrangements being similar to those described above. Fig. 4 shows a modification in which a cylinder 39 and piston-rod 47 are connected to opposite corners of a jointed parallelogram, the other two corners being connected to the axle and body respectively. The connexion to the body is capable of movement about a longitudinal pivot 42. The rod 47 is screwed to take a nut by which the initial tension of the spring contained within the cylinder 39 is adjusted. The auxiliary spring is contained within the cylinder or in any other position between the body and axle. Links 48, 50 connect the axle and cylinder respectively to the body. Fig. 6 shows a lever connected at its ends to the body and axle and having a sleeve 56 which is connected to a spring in a cylinder 54 through eccentrics 59, 60 so that the leverage increases with the displacement. There are two eccentrics similar to the eccentric 60 which are connected by chains 62 to the sleeve 56, and the eccentric 59 is connected by a chain 63 to the spring. Automatic means for moving the sleeve 56 on the lever to meet variations of load are provided and are similar to those shown in Fig. 1. The auxiliary spring acts through a rod 69 on the sleeve 56. Fig. 7 shows a modification in which a sleeve 76 is acted upon by a piston 74 which moves in a cylinder 73 mounted concentrically in a large cylinder 71 containing compressed air so that variations of pressure are reduced. Means similar to those shown in Fig. 6 may be used for adjusting the sleeve on the lever. The auxiliary spring is arranged between the body and the axle.