Brake shoe and brake assembly

F - Mech Eng,Light,Heat,Weapons – 16 – D

Patent

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Details

F16D 65/08 (2006.01) F16D 51/14 (2006.01) F16D 51/18 (2006.01) F16D 65/09 (2006.01) F16D 65/14 (2006.01) F16D 51/00 (2006.01)

Patent

CA 2327864

A brake shoe assembly (1) for a drum brake, the brake shoe assembly being a single-piece construction and including a brake shoe (2) of generally circular form having two separate and opposed ends (17, 18), and defining a pair of friction lining mounting sections (11, 12) disposed on opposite sides of the brake shoe (2). The friction lining mounting sections (11, 12) have a T-shaped cross-sectional form defining an arcuate, radially outer platform (15) for mounting a friction lining (16) and a radially inwardly extending web (14). The brake shoe (2) including hinge means (27, 28) between the lining mounting sections (11, 12), facilitating pivoting movement of the lining mounting sections (11, 12), to alter the separation between the brake ends (17, 18) between a brake operative condition in which in use, the friction lining (16) engages a braking surface of a drum to which the brake shoe assembly (1) is fitted, and a brake inoperative condition in which there is no such engagement. The brake shoe assemblying further includes a backing plate depending from the brake shoe (2) in the region of the hinge means (27, 28) for mounting the brake shoe (2) to a brake shoe assembly support.

Ensemble segment de frein (1) conçu pour un frein à tambour, présentant une construction monobloc et comprenant un segment de frein (2) de forme généralement circulaire possédant deux extrémités séparées et opposées (17, 18) et définissant une paire de sections de montage (11, 12) de revêtement de friction situées sur les côtés opposés du segment de frein (2). La section transversale de ces sections (11, 12) présente une forme de T définissant une plate-forme incurvée extérieure radiale (15) servant à monter un revêtement de friction (16) et une âme (14) s'étendant vers l'intérieur dans un sens radial. Ce segment de frein (2) comprend des moyens d'articulation (27, 28) entre les sections (11, 12) afin de faciliter la rotation desdites sections (11, 12), de manière à modifier la séparation entre les extrémités de frein (17, 18) entre un état opérationnel dans lequel le revêtement de friction (16) vient en contact avec une surface de freinage d'un tambour auquel est fixé l'ensemble segment de frein (1) et un état non opérationnel dans lequel ce contact est inexistant. Cet ensemble segment de frein comprend également un plateau de frein dépendant du segment de frein (2) dans la zone des moyens d'articulation (27, 28) afin de monter le segment de frein (2) à un support d'ensemble segment de frein.

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