Improved disc brake caliper

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

Patent

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Details

F16D 55/228 (2006.01) F16D 65/092 (2006.01) F16D 65/095 (2006.01)

Patent

CA 2476704

An opposed piston disc brake caliper (10), including a caliper housing (11) arranged for mounting brake shoes on each of opposite sides of a rotor which in use is disposed between the brake shoes (17), each brake shoe (17) having radially inner (26) and outer (27) edges when mounted in the housing (11) and side edges (28, 29) extending therebetween. A piston is associated with each brake shoe (17) and is operable in use to shift the respective brake shoe (17) toward the rotor for engagement therewith to effect braking. First mounting means (20) for mounting the brake shoes (17) within the housing (11), and second mounting means (41) for mounting the caliper (10) to a wheel assembly. The second mounting means (41) extending from the housing (11) on one side of the rotor. The housing (11) including side walls (12,13) which extend generally in planes parallel to the plane of the rotor and on opposite sides of the rotor plane and which accommodate the pistons, and end walls (14, 15) which extend transverse to the side walls (12, 13) and are connected therebetween. An axial extension (36) that extends axially from a first of the side walls (12) towards the rotor from a position adjacent the radially inner brake shoe edge (26) and fully along the first side wall (12) to connect with each of the end walls (14, 15) and the first side wall (12) being disposed on the side of the rotor opposite to that of the second mounting means (41).

Un étrier de frein à disque à pistons opposés (10) comprend un logement d'étrier (11) servant à fixer les patins de frein sur les côtés opposés d'un rotor qui, pendant la marche, se place entre les patins de frein. Montés dans le logement (11), chaque patin de frein (17) comporte des bords intérieur (26) et extérieur (27) radiaux séparés par des bords latéraux (28, 29). Un piston associé à chaque patin de frein (17) agit de façon à déplacer le patin de frein respectif (17) vers le rotor pour solidariser ces derniers et exercer le freinage. Par ailleurs, un premier dispositif de fixation (20) permet de fixer les patins de frein (17) au logement (11), et un second dispositif de fixation (41) permet de fixer l'étrier (10) à un ensemble roue. Le second dispositif de fixation (41) s'étend à partir du logement (11) sur un des côtés du rotor. Le logement (11) comprend d'une part des parois latérales (12,13) qui s'étendent généralement dans des plans parallèles au plan du rotor ainsi que vers les côtés opposés du plan du rotor et qui portent les pistons, et d'autre part des parois d'extrémité (14, 15) reliées entre elles qui s'étendent transversalement aux parois latérales (12, 13). Une rallonge axiale (36) s'étend axialement le long d'une première paroi latérale (12) vers le rotor, en partant d'une position où elle se trouve radialement proche du bord intérieur radial (26) du patin de frein, pour se raccorder à chacune des parois latérales (14, 15), la première paroi latérale (12) étant disposée sur le côté du rotor qui est opposé au second dispositif de fixation (41).

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