| 摘要 |
1,182,067. Variable flexibility wheel suspension. SOC. ANON. ANDRE CITROEN. 8 July, 1968 [25 July, 1967; 17 May, 1968], No. 32453/68. Heading B7D. A longitudinally resilient vehicle wheel suspension comprises an oscillating wheel supporting arm 3 pivoted to a horizontal longitudinal shaft 1 rigid with the vehicle frame by the interposition of a non-elastic spherical bearing 4 disposed substantially in the transverse vertical plane Q containing the centre of the wheel 19 and resilient abutment means 5 forming a second bearing for the shaft 1 and serving to limit the horizontal oscillations of the arm 3 about the centre of the bearing 4 the oscillating wheel carrier arm 3 is connected to a stub axle 20 through a universal joint 18 and the centre of bearing 4 lies substantially in the transverse vertical plane Q containing the centre M of the pivotal joint 18. In a modification, Fig. 2, the spherical bearing comprises a ball-shaped member 4A secured to the shaft by means of a nut 6, and fitting in a seat 7 held in the bore of arm 3 by a screw-threaded ring 8. In another modification, Fig. 3, (not shown) the shaft ( 1 ) is mounted between parallel flanges on the frame (2), and the spherical bearing comprises a spherical-race roller bearing (4B) having its outer race rotained in arm (3) by a screw-threaded ring (8), its inner race being held against a shoulder on the shaft (1) by a tubular spacer (9) reacting against the adjacent flange of the frame (2). In both modifications the bearing 5 comprises a resilient annular bushing adapted or not to rotate about the shaft 1 and/or in the hub of arm 3. The bearings 4, 5 are sealed by flexible seals 10, 11, or (12), (13) fitted to the ends of arm 3, and are separated by an annular packing 14 to permit separate lubrication of the two bearings. For a steerable wheel, to avoid any influence of the longitudinal wheel displacements on the steering, a steering arm to is secured to the stub axle 20, and a link 16 connects this arm to a steering control bar 17, the link 16 being parallel and equal in length to the axis OM. In further modifications, the shape of the bushing is altered so that cavities are formed between the bushing and the hub or the shaft, or within the bushing itself, in order to provide a greater flexibility in the horizontal direction, and the bushing is locked against rotation with respect to the hub only, Figs. 4, 5, (not shown), with respect to the shaft only, Fig. 6, (not shown) and with respect to the hub and the shaft, Fig. 7, (not shown). |
