An abutment-plate portion of a main body portion of a biasing member, which faces a disc rotor in an axial direction, includes a pad-return portion for biasing a friction pad in a direction separating apart from the disc rotor, and upper and lower claw portions which are located separately on the up
An abutment-plate portion of a main body portion of a biasing member, which faces a disc rotor in an axial direction, includes a pad-return portion for biasing a friction pad in a direction separating apart from the disc rotor, and upper and lower claw portions which are located separately on the upper and lower sides of the pad-return portion. The upper and lower claw portions of the biasing member are brought into abutment against upper and lower groove portions respectively with a frictional resistance When a lining of the friction pad is worn away and the friction pad is pressed in a direction approaching to the disc rotor in accordance with the wear of the lining, the movement of the entire biasing member in the direction approaching to the disc rotor inside a pad guide is allowed by the upper and lower claw portions serving as wear-following portions.
대표청구항▼
1. A disc brake apparatus, comprising: a caliper to be mounted to a non-rotating portion of a vehicle;a friction pad including a lining made of a friction material, the friction pad being provided to face the disc rotor and pressed by the caliper toward the disc rotor;two guide surfaces provided to
1. A disc brake apparatus, comprising: a caliper to be mounted to a non-rotating portion of a vehicle;a friction pad including a lining made of a friction material, the friction pad being provided to face the disc rotor and pressed by the caliper toward the disc rotor;two guide surfaces provided to the caliper, the two guide surfaces extending in a direction of movement of the friction pad; anda biasing member to be brought into abutment against the two guide surfaces and provided so as to be movable in a direction approaching to the disc rotor in accordance with wear of the lining of the friction pad, wherein:the biasing member comprises:a main body portion; a first spring part extending from the main body portion such that the first spring part can be flexurally deformed, the first spring part being configured to be brought into abutment against the friction pad at the distal end of the first spring part for biasing the friction pad relative to the main body portion in a direction separating apart from the disc rotor; anda second spring part, provided separately from the first spring part and configured to be brought into abutment against one of the two guide surfaces, for biasing the main body portion toward the other of the two guide surfaces; andthe second spring part restricts the movement of the biasing member relative to the caliper until the first spring part is elastically deformed by a predetermined deflection amount by the movement of the friction pad. 2. A disc brake apparatus according to claim 1, wherein: the biasing member is provided with a stopper part; andthe stopper part comes into abutment against the friction pad when the friction pad moves in the direction separating apart from the disc rotor by a biasing force of the first spring part, to thereby restrict a return position of the friction pad. 3. A disc brake apparatus according to claim 1, wherein: each of the caliper and the friction pad has one of a concave portion and a convex portion, for recess-projection fitting; andthe biasing member is provided between the concave portion and the convex portion. 4. A disc brake apparatus according to claim 3, wherein: the biasing member is formed into a U-like shape for fitting into the concave portion; andthe main body portion comprises: two concave-portion facing plate portions facing the concave portion in a radial direction of the disc rotor; anda rotor-facing plate portion facing the disc rotor in an axial direction of the disc rotor. 5. A disc brake apparatus according to claim 4, wherein the first spring part is extended from the rotor-facing plate portion of the main body portion. 6. A disc brake apparatus according to claim 4, wherein the second spring part is extended from at least one of the two concave-portion facing plate portions of the main body portion. 7. A disc brake apparatus according to claim 4, wherein the biasing member is provided with a radial spring part extended from the main body portion to bias the friction pad outward in the radial direction of the disc rotor. 8. A disc brake apparatus according to claim 1, wherein: the friction pad has a convex portion at a position corresponding to a circumferential end of the disc rotor;the caliper is provided with a concave portion into which the convex portion is fitted by recess-projection fitting; andthe biasing member covers the convex portion from an axial direction of the disc rotor and is locked in an elastically deformed state inside the concave portion. 9. A disc brake apparatus according to claim 1, wherein: a pair of biasing members are provided movably to the caliper and are arranged such that the biasing members are separated apart from each other in a circumferential direction of the disc rotor; andone of the pair of biasing members on a disc-incoming side is provided with a circumferential spring part for biasing the friction pad to a disc-outgoing side in the circumferential direction of the friction pad. 10. A disc brake apparatus according to claim 1, wherein the caliper comprises a piston driven by an electric motor to press the friction pad toward the disc rotor. 11. A disc brake apparatus according to claim 1, wherein: the caliper comprises: a mounting member mounted to the non-rotating portion of the vehicle; anda caliper main body movably provided to the mounting member; andthe two guide surfaces are provided to the mounting member. 12. A disc brake apparatus according to claim 1, wherein: the caliper comprises a caliper main body to be mounted to the non-rotating portion of the vehicle; andthe two guide surfaces are provided to the caliper main body. 13. A disc brake apparatus, comprising: a mounting member to be mounted to a non-rotating portion of a vehicle;a friction pad having a lining to be brought into abutment against a disc rotor, the friction pad being movably provided to the mounting member by a caliper main body provided to the mounting member;two guide surfaces provided to the mounting member, the two guide surfaces extending in a direction of movement of the friction pad;a biasing member to be brought into abutment against the two guide surfaces and provided movably in a direction approaching to the disc rotor in accordance with wear of the lining of the friction pad, wherein:the biasing member comprises: a main body portion;a first spring part extending from the main body portion such that the first spring part can be flexurally deformed, the first spring part being configured to be brought into abutment against the friction pad at the distal end of the first spring part for biasing the friction pad relative to the main body portion in a direction separating apart from the disc rotor;a second spring part provided separately from the first spring part and configured to be brought into abutment against one of the two guide surfaces to bias the main body portion to the other of the two guide surfaces; anda stopper part to be brought into abutment against the friction pad to restrict a return position of the friction pad when the friction pad moves in the direction separating apart from the disc rotor by a biasing force of the first spring part; andthe second spring part restricts the movement of the biasing member relative to the mounting member until the first spring part is elastically deformed by a predetermined deflection amount by the movement of the friction pad. 14. A disc brake apparatus according to claim 13, wherein: each of the mounting member and the friction pad has one of a concave portion and a convex portion, for recess-projection fitting; and the biasing member is provided between the concave portion and the convex portion. 15. A disc brake apparatus according to claim 14, wherein: the biasing member is formed into a U-like shape for fitting into the concave portion; andthe main body portion comprises: two concave-portion facing plate portions facing the concave portion in a radial direction of the disc rotor; anda rotor-facing plate portion facing the disc rotor in an axial direction of the disc rotor. 16. A disc brake apparatus according to claim 15, wherein the first spring part is extended from the rotor-facing plate portion of the main body portion. 17. A disc brake apparatus according to claim 15, wherein the second spring part is extended from at least one of the two concave-portion facing plate portions of the main body portion. 18. A disc brake apparatus according to claim 15, wherein the biasing member is provided with a radial spring part extended from the main body portion to bias the friction pad outward in the radial direction of the disc rotor. 19. A disc brake apparatus, comprising: a mounting member provided to a non-rotating portion of a vehicle and includes two guide surfaces on which a friction pad is provided, the two guide surfaces being formed to extend in a direction of movement of the friction pad, the friction pad including a lining and being provided so as to face a disc rotor, the friction pad being movable in a direction approaching to the disc rotor;a biasing member to be brought into abutment against the two guide surfaces between a concave portion and a convex portion by which the mounting member and the friction pad are fitted to each other by recess-projection fitting, wherein:the biasing member comprises: a main body portion;a first spring part extending from the main body portion such that the first spring part can be flexurally deformed, the first spring part being configured to be brought into abutment against the friction pad at the distal end of the first spring part for biasing the friction pad relative to the main body portion in a direction separating apart from the disc rotor;a second spring part provided separately from the first spring part and configured to be brought into abutment against one of the two guide surfaces to bias the main body portion toward the other of the two guide surfaces so that the mounting member is movable in a direction approaching the disc rotor in accordance with wear of the lining of the friction pad; anda stopper part to be brought into abutment against the friction pad to restrict a return position of the friction pad when the friction pad moves in the direction separating apart from the disc rotor by a biasing force of the first spring part; andthe second spring part restricts the movement of the biasing member relative to the mounting member until the first spring part is elastically deformed by a predetermined deflection amount by the movement of the friction pad. 20. A disc brake apparatus according to claim 19, wherein: the biasing member is formed into a U-like shape for fitting into the concave portion; andthe main body portion comprises: two concave-portion facing plate portions facing the concave portion in a radial direction of the disc rotor; anda rotor-facing plate portion facing the disc rotor in an axial direction of the disc rotor.
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이 특허에 인용된 특허 (10)
Souma Teruo (Toyota JPX), Anti-rattle spring member for a disc brake pad.
Merrien, Sandra; Gaye, Andre; Bindner, Thierry, Fixed caliper disk brake having stabilized brake pads, and related assembly and pad replacement methods.
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