Brakes – Wheel – Transversely movable
Patent
1989-08-25
1991-01-01
Butler, Douglas C.
Brakes
Wheel
Transversely movable
188329, 188205R, 188206R, 188330, F16D 6509
Patent
active
049812009
ABSTRACT:
An improved "expanding-shoe" drum brake (100), including an immovable spider member (38) to which brake shoes (18, 19) are pivotally mounted to move into engagement with a rotating annular brake drum (10). As is common, the shoes move in response to motion of a brake-actuating rotatable S cam (12), which is located between first adjacent ends of the brake shoes. The cam applies force to two cam followers (14, 15), which are rollers rotatably fixed to respective brake shoes. At the second end of each brake shoe an anchor pin (30, 31) is fixedly mounted to with webs of the respective brake shoe, as by welding (57A, 57B). In the embodiment described, a corresponding receptacle (43, 45) in the immovable spider has a semicircular surface (49, 51) at its bottom to serve as a bearing. The bearing surface engages the anchor pin, for rotation of the shoe. The brake shoe is resistant to twisting and misalignment.
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Butler Douglas C.
Eaton Corporation
Grace C. H.
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