| 摘要 |
A disc brake (10) with an anchor (12) fixed to a housing. The anchor (12) has non-symmetrical first (18) and second (20) rails which align first (22) and second (24) friction pads with a rotor (26). The first rail (18) has first (32) and second (34) sections with constraining surfaces (48,48') thereon separated from first bearing surfaces (50,50') by a first groove (44,44'). The second rail (20) has first (36) and second (38) sections with aligning surfaces thereon (55,55') separated from second bearing surfaces (60,60') by a second groove (53,53'). The first bearing surfaces (50,50') have a first complementary relationship with respect to aligning surfaces (55,55') and the second bearing surfaces (60,60') have a second angled complementary relationship with respect to the constraining surfaces (48,48'). The first (22) and second (24) friction pads (24) each have a carrier member (62,62') with a first projection (64,64') that respectively contact the constraining surface (48,48') along a first line of tangency in the first sections (32,34) of the first rail (18) and a second projection (68,68') along a second line of tangency in the first section (36,38) of the second rail (20). A spring (88) engages the first (62) and second (62') carrier members to sustain the second line of tangent contact with the second bearing surface (60,60'). The first (22) and second (24) friction pads on being moved into engagement with the rotor (26) produce a braking force to effect a brake application. The braking force causes the carrier members (62,62') to pivot about the first point of tangency engagement on the constraining surfaces (48,48') and transmit one half of the braking force into the first rail (18) and the other half of the braking force into the second bearing surfaces (60,60') through the second line of tangency during a brake application.
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