| 摘要 |
1,128,124. Railway vehicle undercarriages; tandem axles. BUDD CO. 26 Jan., 1967 [1 Feb., 1966], No. 3980/67. Headings B7D and B7L. A vehicle body 11, Figs. 2 and 3, is supported from a bogie bolster 16 either by primary pneumatic spring means 20 or by secondary coil spring means 23. As shown, the spring means 20, which is connected by a flexible hose 33 to a reservoir formed by the hollow bolster 16, is supported between the body 11 and a beam 19 pivoted through a shackle 27 and clevis 30, to the bolster. The spring means 23 is supported between a cup 61, of the beam, and the bolster 16. When the air spring is operative the beam 19 engages a block 25 on the bolster and the means 23 is compressed, the load being taken solely by the air spring means. Should the latter be inoperative, e.g. deflated, Fig. 3, the cup 61 engages a resilient bumper 64 on the body 11 and the load is taken by the spring means 23. In another embodiment the air spring is between the beam and bolster and the coil spring means between the beam and body. The beam is then pivoted to the body. |
