JP2011127619A - Disk brake for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk brake for vehicle, capable of reducing the processing cost by minimizing the length of a pin insert hole for inserting a slide pin therethrough. <P>SOLUTION: A calliper body 4 includes a pair of slide pin attachment arms 4e provided at both ends thereof in a disk rotating direction, and a slide pin 10 provided thereon in a protruding manner. A calliper bracket 3 includes a pad support portion 3d for supporting each friction pad 5, 6 so as to be movable in the disk axial direction. Each back plate 5b, 6b of the friction pads 5, 6 includes a slide pin insert portion 5d, 6d with a pin insert hole 5c, 6c for inserting the slide pin 10, which is provided at both ends in the disk rotating direction, and a fitting portion 5e, 6e to be suitable for the pad support portion 3d. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a pin slide type vehicle disc brake mounted on a vehicle such as an automobile or a motorcycle or three-wheeled vehicle, and more specifically, a caliper bracket fixed to a vehicle body can move a caliper body in a disc axial direction. The present invention relates to a disposed vehicle disc brake.

  Conventionally, as a pin slide type vehicle disc brake, a pair of slide pin mounting arms is provided on a caliper body, a slide pin projects from the slide pin mounting arm, and is fixed to a vehicle body at one side of a disc rotor. The caliper bracket is provided with a caliper support arm having a pin insertion hole that movably accommodates the slide pin, and the caliper body is inserted into the pin insertion hole by inserting the slide pin protruding from the mounting arm into the caliper body. Some brackets are attached so as to be movable in the disk axial direction (see, for example, Patent Documents 1 and 2).

JP 2009-127646 A Japanese Patent No. 4288197

  However, in the above, the pin insertion hole formed in the caliper bracket is processed to a depth corresponding to the length of the slide pin, and accuracy for ensuring the slide property of the slide pin is required. Therefore, there is a possibility that the processing cost is increased and the productivity is lowered.

  Accordingly, an object of the present invention is to provide a vehicular disc brake capable of reducing the length of a pin insertion hole through which a slide pin is inserted as much as possible and reducing the processing cost.

  In order to achieve the above object, a disk brake for a vehicle according to the present invention includes an action portion having a cylinder hole disposed on one side portion of a disk rotor, and a reaction portion disposed on the other side portion of the disk rotor. A caliper body integrally connected by a bridge portion straddling the outside of the disc rotor is slidable in the disc axial direction by a slide pin, and a pair of friction pads sandwiching the disc rotor between the action portion and the reaction portion In the vehicular disc brake, the caliper bracket fixed to the vehicle body at one side of the disc rotor is provided with a pad support portion that supports the friction pad so as to be movable in the disc axial direction. Slide pins are attached to a pair of slide pin mounting arms provided at both ends of the action portion in the disk rotation direction toward the reaction portion side. The friction pads are provided with slide pin insertion portions having pin insertion holes for inserting the slide pins at both ends of the disc rotation direction of the back plate, and are fitted into the pad support portions. It is characterized by having a joint.

  In addition, the caliper bracket has a pair of connecting arms extending in the direction of the reaction part across the outer side of the disk rotor at both ends of the disk rotation direction, extending to the action part side and the reaction part side of each connection arm, Friction pad support arms project from the center of the caliper body so as to face each other across the disk rotor, and at the tip of each friction pad support arm, the inner side of the caliper body center side, the outer peripheral side of the disc, and the inside of the disc The pad support portion having a peripheral side surface is formed, a torque receiving surface is formed on the inner side surface, and the fitting portion is provided on a torque transmitting surface that contacts the torque receiving surface, and on the outer peripheral side surface of the disk. The caliper bracket may be provided with a disc outer peripheral fitting surface that abuts and a disc inner peripheral fitting surface that abuts on the disc inner peripheral surface. A pair of connecting arms projecting in the direction of the reaction part across the outside of the disk rotor are extended at both ends in the direction, and friction is applied to the action part side and reaction part side of each connection arm toward the caliper body center side. Pad support arms project from each other across the disc rotor, and the pad support portions projecting toward the outer periphery of the disc are formed at the tip portions of the friction pad support arms. The pad support portions are formed at the center of the caliper body. An inner side surface and an outer side surface, a disc outer peripheral side surface and a disc inner peripheral side surface, a torque receiving surface is formed on the inner side surface, and the fitting portion includes a torque transmitting surface abutting on the torque receiving surface; And an outer fitting surface that comes into contact with the outer surface, a disc outer peripheral fitting surface that comes into contact with the outer peripheral surface of the disc, and a disc inner peripheral fitting surface that comes into contact with the inner peripheral surface of the disc. It may be.

  Further, the outer side surface of the pad support portion on the disk entry side when the vehicle moves forward may be gradually inclined toward the center of the caliper body toward the outer periphery of the disk, The disk inner peripheral side surface of the pad support portion may be gradually inclined toward the disk inner peripheral side toward the disk delivery side. In addition, a pad return spring can be mounted on the outer periphery of the slide pin disposed between the two friction pads.

  According to the vehicle disc brake of the present invention, the slide pin protruding from the caliper body is inserted into the pin insertion hole of the slide pin insertion portion formed in the friction pad, and the friction pad is formed on the pad support portion formed in the caliper bracket. The caliper body can be arranged so as to be movable in the disk axial direction by fitting the fitting portions formed in the above. Furthermore, since the pin insertion hole through which the slide pin is inserted is a through hole formed in the back plate of the friction pad, the length of the pin insertion hole can be shortened, and the cost required for drilling can be reduced. Productivity can be improved.

  Moreover, while forming the pad support portion and the fitting portion by forming the pad support portion at the tip of the friction pad support arm and forming a torque receiving surface on the inner surface of the pad support portion, It is possible to satisfactorily receive the braking torque from the friction pad on the torque receiving surface.

  Furthermore, the pad support portion is formed by projecting from the tip of the friction pad support arm toward the outer periphery of the disk, and a torque receiving surface is formed on the inner surface of the pad support portion, so that the friction pad can be stably slidable. The braking torque can be satisfactorily received from the friction pad on the torque receiving surface.

  In addition, when the vehicle moves forward, the outer surface of the pad support portion on the disk entry side is gradually inclined toward the center of the caliper body toward the outer periphery of the disk, so that the vehicle is braked with a weak braking force when traveling at a low speed. Even if it is performed, due to the braking torque, the outer surface and the outer fitting surface of the fitting portion of the friction pad come into contact with each other, and as the outer surface is inclined, the disk insertion side of the friction pad is moved to the disk. The friction pad can be rotated to the outer peripheral side by rotating the disk delivery side of the friction pad toward the inner peripheral side of the disk, ensuring that the torque receiving surface and the torque transmission surface of the fitting part are in contact with each other. The brake squeal generated by vibrating at can be suppressed.

  Further, the disc inner peripheral side surface of the pad support portion on the disc delivery side when the vehicle moves forward is gradually inclined toward the disc inner side toward the disc delivery side, so that the disc inner peripheral side surface is caused by braking torque. The friction pad engagement part contacts the inner peripheral surface of the disk, and the friction pad enters the inner periphery as the disk inner peripheral surface inclines. Rotation of the disc to the outer periphery of the disc facilitates the reliable engagement between the torque receiving surface and the torque transmission surface of the mating part even when the vehicle is braked with a weak braking force when traveling at low speed. It is possible to suppress the occurrence of brake squealing.

  In addition, since a pad return spring is mounted on the outer periphery of the slide pin disposed between both friction pads, the pad return spring compressed at the time of braking is restored to the initial state when the brake is released, thereby braking. At the time of release, the friction pad can be reliably separated from the side surface of the disk rotor.

1 is a partially cutaway front view of a vehicle disc brake showing a first embodiment of the present invention. FIG. 2 is a partially sectional rear view of the vehicle disc brake. It is a top view of the disk brake for vehicles similarly. It is IV-IV sectional drawing of FIG. It is a perspective view of a disk brake for vehicles similarly. It is a front view of the disk brake for vehicles which shows the 2nd example of the present invention. FIG. 2 is a partially sectional rear view of the vehicle disc brake. It is a perspective view of a disk brake for vehicles similarly.

  1 to 5 are views showing a first embodiment of a vehicle disc brake according to the present invention. The disk brake 1 for a vehicle includes a disk rotor 2 that rotates integrally with a wheel (not shown), and a pin slide type caliper body 4 that is supported by a caliper bracket 3 attached to a vehicle body at one side of the disk rotor 2. The caliper body 4 includes a pair of friction pads 5 and 6 disposed opposite to each other with the disc rotor 2 interposed between the action portion 4a and the reaction portion 4b. An arrow A is the direction of rotation of the disc rotor 2 that rotates integrally with the front wheels when the vehicle moves forward, and the disk unloading side and the disk loading side described below are those when the vehicle moves forward.

  The caliper body 4 includes the above-described action part 4 a and reaction part 4 b disposed on both sides of the disk rotor 2, and a bridge part 4 c that connects these parts across the outer periphery of the disk rotor 2. The action part 4a is provided with a bottomed cylinder hole 7 that opens to the disk rotor side, and a plurality of reaction force claws 4d are integrally formed with the reaction part 4b. A piston 8 is inserted into the cylinder hole 7 so as to be fluid-tight and slidable, and a hydraulic chamber 9 is defined between the piston 8 and the bottom of the cylinder hole 7. Further, slide pin mounting arms 4e and 4e project from both ends of the acting portion 4a in the disk rotation direction, and a pair of slide pins 10 and 10 project from the slide pin mounting arms 4e and 4e.

  The caliper bracket 3 is fixed by screwing a fixing bolt inserted into the vehicle body mounting portions 3a, 3a on one side of the disk rotor 2 to the vehicle body (none of which is shown). A pair of connecting arms 3b, 3b extending across the outside of the disk rotor 2 and projecting in the direction of the reaction portion across the bridge portion 4c of the caliper body 4 is extended. Further, friction pad support arms 3c are provided to project from the action part side and the reaction part side of each connecting arm 3b so as to face the center side of the caliper body 4 with the disc rotor 2 interposed therebetween. . Each friction pad support arm 3c is provided with a convex pad support portion 3d projecting toward the outer periphery of the disk, and the friction pads 5 and 6 are supported by the pad support portion 3d so as to be movable in the disk axis direction. Is done.

  Each pad support portion 3d includes an outer side surface 3e, an inner side surface 3f, a disc outer peripheral side surface 3g, and a disc inner peripheral side surface 3h with respect to the caliper body center, and each disc outer peripheral side 3g is connected to the center of the disc rotor 2 and the cylinder hole 7. Are arranged on the same plane PL1 orthogonal to the center line C1 connecting the centers of the two. Further, a torque receiving surface 3i parallel to the center line C1 is formed on the inner peripheral side of the inner side surface 3f, and the outer peripheral side of the disc is closer to the outer peripheral side of the disc than the torque receiving surface 3i of the inner side surface 3f. The inclined surface 3k is gradually inclined toward the opposite center line C1. Further, the outer side surface 3e of the pad support portion 3d on the disk entry side is gradually inclined toward the center line C1 side toward the outer periphery side of the disc, and the disc inner peripheral side surface 3h of the pad support portion 3d on the disk delivery side is The disk is gradually inclined toward the inner periphery of the disk toward the outlet side. Further, the length of the pair of pad support portions 3d on the action portion side in the disk axial direction has a length dimension that can cover the movement amount of the friction pad 5 during braking, and the pair of pad support portions 3d on the reaction portion side. Since the friction pad 6 hardly moves at the time of braking, the length dimension in the disk axial direction is substantially the same as or slightly longer than the thickness dimension of the back plate 6b of the friction pad 6.

  Each friction pad 5, 6 is formed by joining linings 5 a, 6 a that are in sliding contact with the side surface of the disk rotor 2 to metal back plates 5 b, 6 b. Each of the back plates 5b and 6b has a pair of slide pin insertion portions 5d and 6d respectively provided with pin insertion holes 5c and 6c through which the slide pin 10 is inserted at both ends of the disk rotation direction. Recessed fitting portions 5e and 6e that are fitted to the pad support portion 3d are formed on both end surfaces in the disc rotation direction on the inner periphery side of the disc with respect to 5d and 6d. The fitting portions 5e and 6e are torque transmitting surfaces 5f and 6f that are in contact with the torque receiving surface 3i of the pad support portion 3d, disc outer peripheral side fitting surfaces 5g and 6g that are in contact with the disc outer peripheral side surface 3g, and the disc. Disc inner peripheral side fitting surfaces 5h, 6h that contact the inner peripheral side surface 3h, and outer fitting surfaces 5i, 6i that contact the outer side surface 3e are provided.

  The disc brake 1 is assembled by first projecting a pair of slide pins 10 and 10 from the slide pin mounting arms 4e and 4e of the caliper body 4, and attaching the friction pads 5 on the action portion side to the slide pins 10 and 10, respectively. The pin insertion holes 5c and 5c formed in the slide pin insertion portions 5d and 5d are respectively inserted, and the friction pad 5 on the action portion side is suspended from the slide pins 10 and 10. Further, after inserting the coiled pad return spring 11 into the slide pins 10 and 10 projecting from the pin insertion holes 5c and 5c of the friction pad 5 on the working part side, respectively, the reaction acts on the tip side of the slide pins 10 and 10. The pin insertion holes 6c, 6c formed in the slide pin insertion portions 6d, 6d of the friction pad 6 on the part side are inserted, and the friction pad 6 on the reaction part side is suspended by the slide pins 10, 10. Next, the fitting parts 5e and 5e of the friction pad 5 on the action part side are connected to the pad support parts 3d and 3d on the action part side of the caliper bracket 3, and the friction pad on the reaction part side is connected to the pad support parts 3d and 3d on the reaction part side. The fitting parts 6e and 6e of the 6 are fitted, and the back plate 6b of the friction pad 6 on the reaction part side is arranged inside the reaction force claws 4d and 4d of the caliper body 4. Further, the friction pads 5 and 6 are arranged on both sides of the disc rotor 2 so as to be movable in the disc axial direction, and the vehicle body attachment portions 3a and 3a of the caliper bracket 3 are attached to the vehicle body, whereby the disc brake 1 is assembled to the vehicle body. It is done.

  When the hydraulic pressure generated in a well-known hydraulic master cylinder (not shown) is supplied to the hydraulic chamber 9 in the disc brake 1 assembled to the vehicle body in this way, the piston 8 advances in the cylinder hole 7 toward the disc rotor. Then, the friction pad 5 on the action part side is pressed, and the friction pad 5 on the action part side is in sliding contact with one side surface of the disk rotor 2 while being supported by the pad support parts 3d and 3d. Next, by this reaction force, the caliper body 4 is moved in the direction of the action part while being guided by the slide pins 10, 10, and the reaction force claw 4 d of the reaction part 4 b causes the friction pad 6 on the reaction part side to move to the disk rotor 2. A braking action is performed by pressing against the other side surface.

  The friction pads 5 and 6 at the time of braking are such that the outer surfaces 3e and 3e of the pad support portions 3d and 3d on the disk entry side are gradually inclined toward the center line C1 toward the outer periphery of the disk, thereby reducing the vehicle speed. Even when braking is performed with a weak braking force during traveling, the outer surface 3e, 3e and the outer fitting surfaces 5i, 6i of the fitting portions 5e, 6e of the friction pads 5, 6 are applied by the braking torque. In contact with the inclination of the outer surfaces 3e and 3e, the disk insertion side of the friction pads 5 and 6 moves to the disk outer peripheral side (in the direction of arrow B1 shown in FIG. 2), and the disk discharge side of the friction pads 5 and 6 moves to the disk. The torque receiving surfaces 3i, 3i and the torque transmitting surfaces 5f, 6f of the fitting portions 5e, 6e can be brought into contact with each other reliably. . Further, the disc inner circumferential side surfaces 3h, 3h of the pad support portions 3d, 3d on the disc delivery side are gradually inclined toward the disc inner circumference side toward the disc delivery side, so that the braking inner torque causes the disc inner circumference side surface. 3h, 3h and the disc inner peripheral side fitting surfaces 5h, 6h of the fitting portions 5e, 6e of the friction pads 5, 6 abut, and the disc rotation of the friction pads 5, 6 is accompanied by the inclination of the disc inner peripheral side surface. Since the exit side promotes the rotation of the friction pad 5 and 6 to the disk outer periphery side, and the vehicle is braked with a weak braking force when traveling at a low speed. The torque receiving surfaces 3i, 3i and the torque transmitting surfaces 5f, 6f of the fitting portions 5e, 6e are brought into contact with each other more reliably, and the torque receiving surfaces 3i, 3i receive the braking torque from the friction pads 5, 6 satisfactorily. Can and It can be friction pads 5 and 6 to suppress the occurrence of brake noise caused by vibrations in an unstable state.

  When the braking operation is released, the caliper body 4 slides toward the reaction portion and returns to the original position, and both friction pads 5 and 6 are separated from the disk rotor 2. At this time, since the pad return spring 11 is wound around the outer periphery of the slide pin 10 disposed between the friction pads 5 and 6, the pad return spring 11 compressed during braking is released when the brake is released. By restoring the initial state, the friction pads 5 and 6 can be reliably separated from the side surface of the disk rotor 2.

  FIGS. 6 to 8 show a second embodiment of the present invention. Components that are the same as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The pad support 3m provided on the caliper bracket 3 of this embodiment is formed at the tip of the friction pad support arm 3c, and the disk outer peripheral side 3n of each pad support 3m is the center of the disk rotor 2 and the center of the cylinder hole 7. Are formed on the same plane PL1 orthogonal to the center line C1, and the disc inner peripheral side surface 3p is formed in parallel with the disc outer peripheral side surface 3n, and the inner side surface 3q is formed in parallel with the center line C1. The whole is a torque receiving surface.

  Further, the fitting portions 5k and 6k formed on the back plates 5b and 6b of the friction pads 5 and 6 are disc outer-side mating surfaces 5m and 6m that are in contact with the disc outer peripheral side surfaces 3n and 3n of the pad support portions 3m and 3m, respectively. The disc inner peripheral side fitting surfaces 5n, 6n that abut against the disc inner circumferential side surfaces 3p, 3p, and the torque transmission surfaces 5p, 6p that abut against the inner side surfaces 3q, 3q serving as the torque receiving surfaces, are provided. It is formed in a letter shape. By forming the present embodiment as described above, the pad support portion 3m and the fitting portions 5k and 6k can be easily formed, and the cost can be further reduced and the productivity can be improved. .

  The present invention is not limited to the one-pot pin slide type disc brake as in the above-described embodiments, but can be applied to a multi-pot pin slide type disc brake. Moreover, the pad support part provided in a caliper bracket can be formed in a concave shape, and the fitting part provided in a friction pad can also be formed in a convex shape.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle disc brake, 2 ... Disc rotor, 3 ... Caliper bracket, 3a ... Car body mounting part, 3b ... Connection arm, 3c ... Friction pad support arm, 3d ... Pad support part, 3e ... Outer side surface, 3f ... Inner side surface 3g ... disk outer peripheral side, 3h ... disk inner peripheral side, 3i ... torque receiving surface, 3k ... inclined surface, 3m ... pad support, 3n ... disk outer peripheral side, 3p ... disk inner peripheral side, 3q ... inner side, 4 ... caliper body, 4a ... action part, 4b ... reaction part, 4c ... bridge part, 4d ... reaction force claw, 4e ... slide pin mounting arm, 5, 6 ... friction pad, 5a, 6a ... lining, 5b, 6b ... back Plate, 5c, 6c ... Pin insertion hole, 5d, 6d ... Pin insertion portion, 5e, 6e ... Fitting portion, 5f, 6f ... Torque transmission surface, 5g, 6g ... Disc outer side fitting surface, 5h, 6h ... Disc Inner side fitting Surface, 5i, 6i ... outer fitting surface, 5k, 6k ... fitting portion, 5m, 6m ... disc outer peripheral side fitting surface, 5n, 6n ... disc inner peripheral side fitting surface, 5p, 6p ... torque transmission surface, 7 ... Cylinder hole, 8 ... Piston, 9 ... Hydraulic chamber, 10 ... Slide pin, 11 ... Pad return spring

Claims (6)

A caliper in which an action part having a cylinder hole arranged on one side of the disk rotor and a reaction part arranged on the other side of the disk rotor are integrally connected by a bridge part straddling the outside of the disk rotor. In a vehicle disc brake in which a body is provided slidably in a disc axial direction by a slide pin, and a pair of friction pads are disposed opposite to each other with the disc rotor interposed between the action portion and the reaction portion, one side of the disc rotor A caliper bracket that is fixed to the vehicle body with a pad support portion that supports the friction pad so as to be movable in the disk axial direction, and the caliper body has a pair of slide pins provided at both ends of the action portion in the disc rotation direction. Slide pins are provided on the mounting arm toward the reaction part, and the friction pads are arranged in both directions of the disc rotation direction of the back plate. In part, the slide pin provided with a slide pin insertion portion having a pin insertion hole for inserting a vehicle disc brake, characterized in that it comprises a fitting portion fitted to the pad support. The caliper bracket has a pair of connecting arms extending in the direction of the reaction portion across the outer side of the disk rotor at both ends of the disk rotation direction. The caliper body is provided on the action portion side and the reaction portion side of each connection arm. Friction pad support arms projecting toward the center side across the disk rotor, and at the tip of each friction pad support arm, the inner side of the caliper body, the outer side of the disk, and the inner side of the disk The pad support portion is formed, a torque receiving surface is formed on the inner side surface, and the fitting portion is in contact with the torque transmitting surface that contacts the torque receiving surface and the outer peripheral side surface of the disk. 2. The disc brake for a vehicle according to claim 1, further comprising: a disc outer peripheral side fitting surface; and a disc inner peripheral side fitting surface abutting on the disc inner peripheral side surface. The caliper bracket has a pair of connecting arms extending in the direction of the reaction portion across the outer side of the disk rotor at both ends of the disk rotation direction. The caliper body is provided on the action portion side and the reaction portion side of each connection arm. Friction pad support arms projecting opposite to each other across the disk rotor toward the center side, and the pad support portion protruding to the outer periphery of the disk is formed at the tip of each friction pad support arm. The support portion includes an inner side surface and an outer side surface with respect to the caliper body center portion, a disc outer peripheral side surface, and a disc inner peripheral side surface, and a torque receiving surface is formed on the inner side surface, and the fitting portion includes the torque receiving surface A torque transmitting surface that contacts the outer surface, an outer fitting surface that contacts the outer surface, a disk outer peripheral surface that contacts the outer peripheral surface of the disc, and an inner peripheral surface of the disc The vehicle disk brake according to claim 1, characterized in that it comprises a disc inner-side fitting surface. 4. The vehicle disc brake according to claim 3, wherein the outer side surface of the pad support portion on the disc entry side when the vehicle moves forward is gradually inclined toward the caliper body center side toward the disc outer peripheral side. 5. The disk inner circumferential side surface of the pad support portion on the disk delivery side when the vehicle moves forward is gradually inclined toward the disk inner circumference side toward the disk delivery side. The disc brake for vehicles according to claim 1. 6. The vehicle disc brake according to claim 1, wherein a pad return spring is mounted on an outer periphery of the slide pin disposed between the two friction pads.

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