A back plate is biased radially inward of a disc rotor by a spring, engaged at two locations on a torque reception surface with a caliper support shaft, and engaged at one location on a torque reception surface with a caliper support shaft. Inner and outer shims are disposed toward a back plate and
A back plate is biased radially inward of a disc rotor by a spring, engaged at two locations on a torque reception surface with a caliper support shaft, and engaged at one location on a torque reception surface with a caliper support shaft. Inner and outer shims are disposed toward a back plate and pistons, respectively, and a friction factor between the back plate and the inner shim and that between the pistons and the outer shim are higher than that between the inner and outer shims. The inner shim is movable with the back plate in radial and circumferential directions and is movable relative to the back plate in the axial direction, and the outer shim is movable with the back plate in radial and circumferential directions, is movable relative to the back plate in the axial direction, and is rotatable about the radially inner support shaft axis.
대표청구항▼
1. A disc brake apparatus which comprises a disc rotor attached to a rotating member and rotating unitarily with the rotating member, a caliper attached to a support body in such a manner as to straddle a partial circumference of the disc rotor, a pair of brake pads disposed in such a manner as to b
1. A disc brake apparatus which comprises a disc rotor attached to a rotating member and rotating unitarily with the rotating member, a caliper attached to a support body in such a manner as to straddle a partial circumference of the disc rotor, a pair of brake pads disposed in such a manner as to be able to nip the disc rotor, and supported via a support shaft by the caliper in such a manner as to be movable in an axial direction of the disc rotor, and pistons attached to the caliper and adapted to press the brake pads toward the disc rotor, and which is configured such that the pistons press back plates of the brake pads, whereby linings of the brake pads are slidably pressed against braking surfaces of the disc rotor, thereby braking the disc rotor, V-shaped radially inner torque reception surfaces being located at positions corresponding to radially inner, circumferentially central portions of the linings with respect to radial and circumferential directions of the disc rotor,radially outer torque reception surfaces being located at positions corresponding to radially outer, circumferentially intermediate portions of the linings with respect to the radial and circumferential directions of the disc rotor,whereinthe brake pads are biased inward with respect to a radial direction of the disc rotor by biasing members, the support shaft is composed of a single radially inner support shaft provided unitarily with the caliper and engaged with the V-shaped radially inner torque reception surfaces of the back plates at two locations on each of the V-shaped radially inner torque reception surfaces, and a radially outer support shaft provided unitarily with the caliper and engaged with the radially outer torque reception surfaces of the back plates at one location on each of the radially outer torque reception surfaces, and the brake pads are attached to the radially inner support shaft in such a manner as to be rotatable by a predetermined amount about an axis of the radially inner support shaft,an inner shim and an outer shim intervene between each of the back plates and each of the pistons in such a manner that the inner and outer shims are disposed toward the back plate and the piston, respectively, and a friction coefficient between the back plate and the inner shim and a friction coefficient between the piston and the outer shim are higher than a friction coefficient between the inner shim and the outer shim,the inner shim is attached to the back plate in such a manner as to be movable unitarily with the back plate in the radial direction of the disc rotor and in the circumferential direction of the disc rotor, and to be movable relative to the back plate in the axial direction of the disc rotor, andthe outer shim is attached to the back plate in such a manner as to be movable unitarily with the back plate in the radial direction of the disc rotor and in the circumferential direction of the disc rotor, to be movable relative to the back plate in the axial direction of the disc rotor, and to be rotatable by a predetermined amount about the axis of the radially inner support shaft. 2. A disc brake apparatus according to claim 1, wherein: the outer shim has a leading-side engagement tab to be engaged with a leading-side engagement surface formed on a leading-side end surface, located on a leading side with respect to the circumferential direction of the disc rotor, of the back plate, a trailing-side engagement tab to be engaged with a trailing-side engagement surface formed on a trailing-side end surface, located on a trailing side with respect to the circumferential direction of the disc rotor, of the back plate, a radially outer engagement tab to be engaged with a radially outer engagement surface formed on a radially outer end surface, located on a radially outer side with respect to the radial direction of the disc rotor, of the back plate, and a radially inner engagement tab to be engaged with a radially inner engagement surface formed on a radially inner end surface, located on a radially inner side with respect to the radial direction of the disc rotor, of the back plate;the leading-side engagement surface, the trailing-side engagement surface, and the radially outer engagement surface of the back plate are formed into respective arc shapes about the axis of the radially inner support shaft; andin a state in which the radially outer support shaft restrains the back plate from tilting, toward the trailing side, on the radially inner support shaft and allows the back plate to tilt, toward the leading side, on the radially inner support shaft, the radially inner engagement tab of the outer shim is disengageably engaged with the radially inner engagement surface of the back plate. 3. A disc brake apparatus according to claim 1, wherein the outer shim has a pair of radially outer engagement tabs to be engaged with a pair of radially outer engagement surfaces formed on the back plate on opposite sides, with respect to the circumferential direction of the disc rotor, of the radially outer torque reception surface; a pair of radially inner engagement tabs to be engaged with a pair of radially inner engagement surfaces formed on the back plate on opposite sides, with respect to the circumferential direction of the disc rotor, of the radially inner torque reception surface; and the pair of radially outer engagement surfaces and the pair of radially inner engagement surfaces formed on the back plate are formed into respective arc shapes about the axis of the radially inner support shaft. 4. A disc brake apparatus according to claim 2 or 3, wherein the outer shim has a stopper which can be engaged with and disengaged from the radially outer support shaft, and, when the radially outer support shaft restrains the back plate from tilting, toward the trailing side, on the radially inner support shaft and allows the back plate to tilt, toward the leading side, on the radially inner support shaft, the stopper is engaged with the radially outer support shaft to restrain the outer shim from tilting toward the trailing side about the radially inner support shaft. 5. A disc brake apparatus according to claim 4, wherein the stopper is engaged with the radially outer support shaft. 6. A disc brake apparatus which comprises a disc rotor attached to a rotating member and rotating unitarily with the rotating member, a caliper attached to a support body in such a manner as to straddle a partial circumference of the disc rotor, a pair of brake pads disposed in such a manner as to be able to nip the disc rotor, and supported via a support shaft by the caliper in such a manner as to be movable in an axial direction of the disc rotor, and pistons attached to the caliper and adapted to press the brake pads toward the disc rotor, and which is configured such that the pistons press back plates of the brake pads, whereby linings of the brake pads are slidably pressed against braking surfaces of the disc rotor, thereby braking the disc rotor, wherein the brake pads are biased inward with respect to a radial direction of the disc rotor by biasing members, the support shaft is composed of a single radially inner support shaft provided unitarily with the caliper and contacts V-shaped radially inner torque reception surfaces of the back plates at two locations on each of the V-shaped radially inner torque reception surfaces, the V-shaped radially inner torque reception surfaces being located at positions corresponding to radially inner, circumferentially central portions of the linings with respect to radial and circumferential directions of the disc rotor, and a radially outer support shaft provided unitarily with the caliper and contacts radially outer torque reception surfaces of the back plates at one location on each of the radially outer torque reception surfaces, the radially outer torque reception surfaces being located at positions corresponding to radially outer, circumferentially intermediate portions of the linings with respect to the radial and circumferential directions of the disc rotor, and the brake pads are attached to the radially inner support shaft in such a manner as to be rotatable by a predetermined amount about an axis of the radially inner support shaft,an inner shim and an outer shim intervene between each of the back plates and each of the pistons in such a manner that the inner and outer shims are disposed toward the back plate and the piston, respectively, and a friction coefficient between the back plate and the inner shim and a friction coefficient between the piston and the outer shim are higher than a friction coefficient between the inner shim and the outer shim,the inner shim is attached to the back plate in such a manner as to be movable unitarily with the back plate in the radial direction of the disc rotor and in the circumferential direction of the disc rotor, and to be movable relative to the back plate in the axial direction of the disc rotor, andthe outer shim is attached to the back plate in such a manner as to be movable unitarily with the back plate in the radial direction of the disc rotor and in the circumferential direction of the disc rotor, to be movable relative to the back plate in the axial direction of the disc rotor, and to be rotatable by a predetermined amount about the axis of the radially inner support shaft.
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이 특허에 인용된 특허 (65)
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