JP2005282758A - Disk brake for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disc brake for a vehicle, in which soil and sand penetrating around a friction pad can be easily discharged even in use in such conditions that soil and sand are relatively easy to penetrate around a brake, so that deterioration of brake feeling or generation of dragging can restricted. <P>SOLUTION: A friction pad inner end surface P1 on the diametrically inward side of a disc rotor in the friction pad 7 disposed on the reaction part side, a reaction pawl inner end surface P2 on the diametrically inward side of the disc rotor in a reaction pawl 6f provided on the reaction part side, and a caliper bracket inner end surface P3 on the diametrically inward side of the disc rotor positioned on the reaction part side of a caliper bracket 3 are linearly disposed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicle disc brake used for an automobile or a motorcycle, and more particularly to a pin slide type vehicle disc brake.

2. Description of the Related Art Conventionally, a pin slide type disc brake has an action portion disposed on one side portion of the disc rotor and a reaction portion provided with a reaction force claw disposed on the other side portion of the disc rotor. A caliper body that is integrally connected by a bridge section that straddles the outside is disposed across the outer periphery of the disk rotor, and a caliper bracket that is fixed to the vehicle body on one side of the disk rotor is connected to the disk shaft via a pair of slide pins. It is slidably supported in the direction. In addition, a pair of friction pads is disposed between the action part and the reaction part with the disk rotor interposed therebetween. A torque transmitting portion projects from the side of the friction pad so that the torque transmitting portion is supported by a torque receiving recess provided on the caliper bracket to hold the friction pad and receive the braking torque by the torque receiving recess. (For example, Patent Document 1).
JP 2004-28304 A

  However, in the conventional disc brake, the portion located on the reaction part side of the friction pad, the reaction force claw, and the caliper bracket has a complicated uneven shape. For this reason, under operating conditions where dirt and sand can easily enter around the brake, the earth and sand that enter the periphery of the friction pad is obstructed by complex uneven shapes, and the escape of dirt and sand entering does not catch up, temporarily around the friction pad. Sediment may accumulate. In this case, although it is temporarily, the brake feeling may be deteriorated or dragged due to the biting of earth and sand.

  Therefore, the present invention is for a vehicle that makes it easy to discharge the sand that has entered the periphery of the friction pad and suppresses the deterioration of the brake feeling and the occurrence of drag even when used under conditions in which the sand is relatively easy to enter around the brake. It aims to provide a disc brake.

  In order to achieve the above object, a vehicle disc brake according to the present invention includes a caliper body in which an action portion and a reaction portion arranged to face each other with a disc rotor interposed therebetween are integrally connected by a bridge portion straddling the outside of the disc rotor. A caliper bracket fixed to the vehicle body is supported so as to be slidable in the disk axial direction via a pair of slide pins, and a pair of friction pads are arranged opposite to each other with the disk rotor interposed between the action part and the reaction part. In the disc brake for a vehicle, the friction pad inner end surface on the inner side in the disk rotor radial direction of the friction pad arranged on the reaction part side, and the reaction force claw on the inner side in the disk rotor radial direction of the reaction force claw provided on the reaction part side The inner end surface and the inner end surface of the caliper bracket on the radially inner side of the disc rotor located on the reaction portion side of the caliper bracket are linear. It is characterized in that disposed.

  Further, it is preferable that both ends of the disk rotor in the circumferential direction of the portion located on the reaction part side of the caliper bracket are inclined surfaces in which the outer side in the disk rotor radial direction expands with respect to the inner end surface of the caliper bracket, It is preferable that both end surfaces in the circumferential direction of the disk rotor of the portion located on the working portion side of the caliper bracket are formed corresponding to the inclined surfaces.

  Furthermore, it is preferable that the caliper bracket is provided with a connecting arm for connecting both ends of the disk rotor in the circumferential direction, and both end surfaces of the connecting arm in the disk rotor circumferential direction are formed corresponding to the inclined surface. It is preferable that the connecting arm is provided only on the action part side of the caliper bracket.

  As described above, by arranging the inner end faces of the friction pad, reaction force claw, and caliper bracket on the reaction side in a straight line, the reaction part side can be made simple, so even if dirt enters the periphery of the friction pad. It can be discharged quickly. Furthermore, earth and sand can be discharged more smoothly by setting both end faces of the caliper bracket to inclined surfaces. In particular, by providing the connecting arm only on the action part side, it is possible to reduce the portion where earth and sand accumulate on the reaction part side, and the earth and sand can be discharged more smoothly on the reaction part side.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. 1 to 5 show a first embodiment of a vehicle disc brake according to the present invention. FIG. 1 is a front view of the disc brake, FIG. 2 is a rear view of the disc brake, and FIG. Fig. 4 is a sectional view taken along line III, Fig. 4 is a sectional view taken along line IV-IV in Fig. 3, and Fig. 5 is a partial sectional plan view of the disc brake. An arrow A in the figure indicates the rotational direction of the disc rotor during forward traveling of the vehicle, and the disc brake turning-in side and the outlet side used in the following description are for forward traveling of the vehicle.

  In the disc brake 1, a caliper bracket 3 is fixed to the vehicle body on one side of the disc rotor 2, and a caliper body 6 is supported on the caliper bracket 3 through slide pins 4 and 5 so as to be movable in the disc axial direction. A pair of friction pads 7, 7 are disposed opposite to each other across the disk rotor 2 between the action portion 6 a and the reaction portion 6 b of the caliper body 6.

  The caliper bracket 3 includes a pair of caliper support arms 3a and 3a projecting in the disk axial direction across the outside of the disk rotor 2, and a connecting arm 3b for connecting both ends of the caliper support arms 3a and 3a. . The connecting arm 3b is provided only on the action part side, has a substantially U shape in front view, and forms a receiving recess 3c for the friction pad 7 on the action part side in the center, and the caliper support arm 3a on both sides in the disk circumferential direction. , 3a.

  The caliper support arms 3a, 3a are formed in a straight line extending from the reaction portion 6b side to the action portion 6a. Inside the caliper support arm 3a on the disk insertion side, a bag-like pin insertion hole 3d is formed. Is opened to the working part side, and a female screw hole 3e is provided to the caliper support arm 3a on the disk delivery side to open to the working part side. U-shaped torque receiving portions 3f and 3f for supporting the braking torque from the friction pads 7 and 7 are formed opposite to each other on the piston-side facing surface of the caliper support arms 3a and 3a.

  Further, both end surfaces of the caliper support arms 3a, 3a in the circumferential direction of the disk rotor are inclined surfaces 3g, 3g in which the radially outer side of the disk rotor 2 expands. Further, both end surfaces of the connecting portions 3h and 3h of the connecting arm 3b and the caliper support arms 3a and 3a in the circumferential direction of the disk rotor are inclined surfaces 3i and 3i continuous corresponding to the inclined surfaces 3g and 3g. .

  The caliper support arms 3a, 3a located on the anti-friction pad side of the torque receiving portions 3f, 3f are provided with a pair of vehicle body mounting portions adjacent to the torque receiving portions 3f, 3f. The mounting bolt mounting holes 3k, 3k for mounting the mounting bolts are formed. The caliper bracket 3 is fixed to the vehicle body by screwing mounting bolts (not shown) inserted from the vehicle body side into the mounting bolt mounting holes 3k, 3k.

  The caliper body 6 includes the above-described action part 6 a and reaction part 6 b that are arranged opposite to both sides of the disk rotor 2, and a bridge part 6 c that bridges the outside of the disk rotor 2 and connects them. A cylinder hole 6d is provided in the center of the action portion 6a so as to open to the disk rotor 2 side. A piston 8 is accommodated in the cylinder hole 6d, and between the piston 8 and the bottom wall of the cylinder hole 6d. A hydraulic chamber 9 is defined.

  Bracket mounting arms 6e and 6e are projected along one side surface of the disk rotor 2 on the disk rotor inlet side and outlet side of the acting portion 6a, and the tip of the bracket inlet arm 6e on the disk inlet side. One slide pin 4 is projected in parallel with the disk shaft by a fixing bolt 10, and the other slide pin 5 is inserted through the collar 11 into the bracket mounting arm 6 e on the disk delivery side. Yes. The disk insertion side slide pin 4 is inserted into the pin insertion hole 3d of the caliper support arm 3a, and the disk supply side slide pin 5 is screwed into the female screw hole 3e of the caliper support arm 3a via the collar 11. The caliper body 6 is guided to move in the disk axial direction by attaching the slide pins 4 and 5. The reaction portion 6b is provided with a reaction force claw 6f that pushes the friction pad 7 on the reaction portion side.

  Each friction pad 7 includes a lining 7a that is in sliding contact with the side surface of the disk rotor 2, and a metal back plate 7b that holds the lining 7a. The back plate 7b is provided with torque transmitting portions 7c, 7c protruding in the direction of turning in and out of the disc, and the torque transmitting portions 7c, 7c are supported by the torque receiving portions 3f, 3f via retainers 12, 12. ing.

  The friction pad 7, the reaction force claw 6f, and the caliper support arms 3a and 3a disposed on the reaction portion 6b side are arranged on the inner side in the disk rotor radial direction of the back plate 7b of the friction pad 7 disposed on the reaction portion 6b side. The friction pad inner end surface P1, the reaction force claw inner end surfaces P2 and P2 of the reaction force claw 6f in the disc rotor radial direction, and the disc rotor radial inner caliper bracket located on the reaction portion 6b side of the caliper support arms 3a and 3a. The inner end surfaces P3 and P3 are formed so as to be linearly arranged.

  Thus, by arranging the friction pad inner end face P1, the reaction force claw inner end face P2 and the caliper bracket inner end face P3 in a straight line, the reaction portion 6b side can be made simple, and the periphery of the friction pads 7, 7 Even if earth and sand enters, it can be discharged quickly without being retained. Further, both end surfaces in the disk rotor circumferential direction of the caliper support arms 3a, 3a located on the reaction portion side are inclined surfaces 3g that expand outward in the disk rotor radial direction with respect to the caliper bracket inner end surface P3. Thus, the discharge of earth and sand can be performed smoothly, and in addition, the both ends of the disk rotor in the circumferential direction of the portion located on the working part side are inclined surfaces corresponding to the inclined surface 3g, thereby discharging the earth and sand. Can be performed more smoothly.

  Further, both end surfaces of the connecting arm 3b in the circumferential direction of the disk rotor are also inclined surfaces 3i, 3i formed continuously corresponding to the inclined surfaces 3g, 3g, so that the earth and sand can be discharged quickly in this portion. Can do. In particular, by providing the connecting arm 3b only on the action part side, the portion where earth and sand accumulate on the reaction part side can be reduced, and the earth and sand can be discharged more quickly on the reaction part side.

  The meaning that the friction pad inner end surface P1, the reaction force claw inner end surface P2 and the caliper bracket inner end surface P3 are linearly arranged is limited to strictly positioning them along a single straight line. Rather, it includes that these are arranged substantially linearly in appearance.

It is a front view of the disc brake which shows one example of the present invention. It is a rear view of a disk brake similarly. It is III-III sectional drawing of FIG. It is IV-IV sectional drawing of FIG. It is a partial cross section top view of a disk brake similarly.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Disc brake, 2 ... Disc rotor, 3 ... Caliper bracket, 3a ... Caliper support arm, 3b ... Connection arm, 3c ... Housing recessed part, 3d ... Pin insertion hole, 3e ... Female screw hole, 3f ... Torque receiving part, 3g, 3i ... Inclined surface, 3h ... Connection part, 3k ... Mounting bolt mounting hole, 4, 5 ... Slide pin, 6 ... Caliper body, 6a ... Action part, 6b ... Reaction part, 6c ... Bridge part, 6d ... Cylinder hole, 6e ... bracket mounting arm, 6f ... reaction force claw, 7 ... friction pad, 7a ... lining, 7b ... back plate, 7c ... torque transmission arm, 8 ... piston, 9 ... hydraulic chamber, 10 ... fixing bolt, 11 ... collar, 12: Retainer, P1: Friction pad inner end surface, P2: Reaction force claw inner end surface, P3: Caliper bracket inner end surface

Claims (5)

  A caliper body in which an action portion and a reaction portion arranged opposite to each other with the disc rotor interposed therebetween are integrally connected by a bridge portion straddling the outside of the disc rotor is connected to a caliper bracket fixed to the vehicle body via a pair of slide pins. In a vehicle disc brake that is slidably supported in the disc axial direction and has a pair of friction pads opposed to each other with the disc rotor interposed between the action portion and the reaction portion, the friction pad arranged on the reaction portion side The inner surface of the friction pad on the inner side of the disk rotor, the inner surface of the reaction force claw of the reaction force claw provided on the reaction part side, and the disk rotor located on the reaction part side of the caliper bracket A disc brake for a vehicle, characterized in that a radially inner caliper bracket inner end surface is arranged linearly.   The both ends of the disk rotor in the circumferential direction of the portion located on the reaction part side of the caliper bracket are inclined surfaces in which the outer side in the disk rotor radial direction expands with respect to the inner end surface of the caliper bracket. Item 4. A vehicle disc brake according to Item 1.   3. The disc brake for a vehicle according to claim 2, wherein both end surfaces of the caliper bracket in the circumferential direction of the portion located on the working portion side are formed corresponding to the inclined surface.   The connecting arm for connecting both ends of the disk rotor in the circumferential direction to the caliper bracket is provided, and both end faces of the connecting arm in the circumferential direction of the disk rotor are formed corresponding to the inclined surfaces. 3. The disc brake for vehicles according to 3.   5. The vehicle disc brake according to claim 4, wherein the connecting arm is provided only on the action portion side of the caliper bracket.

Images