| 摘要 |
1,248,745. Disc brakes; fluid pressure actuator. BENDIX CORP. 8 Nov., 1968 [14 Nov., 1967], No. 53070/68. Headings F2E and F2F. A disc brake comprises a rotatable disc 64, a fixed support 10 having a pair of circumferentially spaced arms 20, 22 and 24, 26, and a floating caliper with spaced end portions 30, 32 held against the arms by resilient means 34, 36, 38, 40 allowing limited rocking motion, the caliper including a housing 28 containing an actuating piston and straddling the disc to embrace friction elements 42, 44 which can be actuated by rocking the housing by means of an arm 54 extending from the housing. The caliper includes sleeves 108, 110 slidably mounted on pins extending through projections 126, 128 of the housing. When the pads are applied by actuating the piston, the caliper slides in the sleeves 108, 110 and the springs 34 ... 40 prevent rattle and allow limited sleeve movement to prevent "knock back" of the piston. The pads can also be applied when arm 54 is actuated by a parking brake cable 62. In this case the springs allow rocking movement of the caliper including the sleeves and return them to the off position when the lever is released. One piston is pivotally mounted on the housing and the other can pivot so that they remain parallel with the disc which is hollow and air cooled. The piston includes adjusting means comprising an adapter 175 slidably mounted in a hole in the piston 46 with an extension 182 carrying a spring ring 184 which frictionally engages a sleeve 180 threaded on a nut 176. The sleeve 180 cannot state but can move axially through the distance 180. A torsional spring 196 is mounted between the adapter and the nut to rotate the nut and thereby maintain the adapter against the piston as it moves forward due to brake wear. The inside of sleeve 180 is connected to the surrounding space by passages 177, 179 to allow bleeding through screw fitting 194. (For Figures see next page.) |
