| 摘要 |
1,134,223. Disc brakes. GIRLING Ltd. 28 March, 1966 [3,0 March, 1965], No. 13343/65. Heading F2E. In a pivotally-mounted caliper disc brake, brake pads 18, 20 are adapted to be urged into frictional contact with the brake disc by a mechanically movable thrust member 22 which acts on at least one brake pad 20 through the intermediary of a resiliently deformable body 30 constituting a force-multiplying element which is deformable to effect braking engagement without being subjected to shear force. In the embodiment shown in Fig. 3 the main brake is actuated by opposed piston and cylinder units 14 which urge pads 16 of friction material against the brake disc. The thrust member 22 is acted upon by a pivoted actuating member 24 to actuate the resiliently deformable rubber block 30 against the friction pad 20 and, by reaction on the pivotally mounted caliper housing 10, the pad 18 which is fixed in the caliper member 10 is adapted to be brought into contact with the opposite face of the brake disc. Adjustment for wear of the mechanically actuated brake is provided by means of a grub screw 32 associated with the indirectly operated pad 18. An automatic adjusting mechanism for the hydraulically actuated brake is provided by a compressible ring 28 which embraces each piston 15 such that, when the fluid pressure is removed, the ring 28 grips the piston and prevents it from retracting any further than is permitted by the natural tendency of the ring to recover its original shape. An alternative embodiment is disclosed in the Specification in Figs. 5 and 6 (not shown), wherein fluid motor means and the mechanically movable member act independently on the same brake pads through a force-multiplying element. |
