| 摘要 |
637,255. Spring suspensions; indiarubber springs. TWIN COACH CO. July 17, 1947, No. 19183. Convention date, March 26, 1941. [Classes 108 (ii) and 108 (iii)] A vehicle spring-suspension for connecting a ground-engaging wheel and associated wheelsupported structure to a body-carrying frame which extends laterally outwardly of the wheel, comprises a torsion spring assembly and a system of laterally-extending force-transmitting links, the suspension being connected to the frame closely adjacent the outer side edge of the latter and to the wheel-supported structure, inwardly of the wheel. In the arrangement according to Fig. 1, front and rear axles 12 and 13 are each connected to a vehicle frame 11 through torsion spring suspensions 16, 17 and 18, 19 respectively. Each of the suspensions 16-19 comprises a rubber torsion spring 34 having an outer tubular member 42, Fig. 8, rigidly mounted on a wheel axle longitudinally of the vehicle frame and an inner tube or rod 43 which projects from each end of the tube 42 and which is connected through a linkage to a respective pair of tubular framemembers 21, 22; 27, 28; 29, 31; 32, 33. Rubber or the like sleeves 44 and 45 are bonded to the rod 43 and to a metal liner 46, integral with and within the tube 42. The liner 46 is preferably sectionalized, the centre section serving as a spacer for the sleeves 44, 45. A boss 52 having an arm 53 at right angles to the rod 43 is mounted non-rotatably on a splined portion 51 at each end of the rod 43 and is embraced by friction-tight bosses 54, 55 integral with legs 56, 57 of a bifurcated lever 58 which is thus movable angularly, relative to rod 43. An upper web portion 63, Fig. 9, on the lever 58 carries an adjustable stop bolt 65 which co-operates with the arm 53 whereby the torsion spring may be pre-loaded and the height of the vehicle frame above the ground adjusted. The free end of lever 58 is pivotally connected to one end of a link 71 comprising spaced parallel plates 72, 73 which are pivotally mounted on a boss 75 of a bracket 76 integral with one of the frame members 21-33. A flat 79 on the underside of bracket 76 cooperates with a stop-bar 81 rigidly secured to the lower end of link 71. An inwardly projecting lip 83 of the bracket 76 supports a double-acting shock-absorber, preferably of the vane type, which is pivotally connected through a link 88 to a lip 91 projecting from and integral with boss 55. Upward deflection of the suspension is limited by rubber pads (Fig. 5, not shown). In a modification (Figs. 12 and 13, not shown), the lever 58 is connected through a link to the corresponding end of a similar lever associated with a second torsion spring having'an outer member rigidly mounted on the outer side edge of the vehicle frame. The invention may be applied to independent wheel suspensions or vehicles employing swing- ing half axles.
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