| 摘要 |
1,180,286. Internal shoe-drum brake; fluid-pressure brakes; pipe joints. NORTH AMERICAN ROCKWELL CORP. 26 May, 1967 [14 June, 1966], No. 24510/67. Headings F2E, F2F and F2G. In a brake actuator assembly for internal shoe-drum brake a wedge and roller actuator device 47, 49, 57 is adapted to be actuated by a fluid pressure motor assembly 31, the motor assembly being provided with a rigid hollow mounting tube 38 which forms a tubular support and enters an aperture 27 in the actuator housing 10. An annular ring member 41 with chamfered surfaces is provided on the hollow mounting tube 38 and an annular plate 67 is adapted to be tightened against the ring member 41 to form retaining means. Alternative retaining means are disclosed in the Specification and, as shown in Fig. 5a, may take the form of a ring 86 of circular cross-section hard steel wire adapted to be located in a groove 85 in the external surface of the tube 38 and adapted to be compressed by means of a plate 67. The plungers 12 and 14 which actuate the brake shoes 16 and 18, respectively, may be adjustable manually by rotation of a star wheel 24 or automatically by means of the device 25. |
