JP2008281120A - Pin slide type disc brake for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensively manufacturable pin slide type disc brake for a vehicle, capable of surely holding a friction pad. <P>SOLUTION: A pad guide groove 7h formed in a bridge part 5b has a disc radial directional groove 7i and a disc peripheral directional groove 7k formed in the disc peripheral direction on the disc rotary direction side, and a receiving surface 7m is arranged inside in the disc radial direction of the disc peripheral directional groove 7k. An installation piece 6c of the friction pad 6 has a projection part 6d projecting outside in the disc radial direction, and a guide piece 6e projecting in the disc peripheral direction on the disc rotary direction side from the tip of the projection part 6d. A pad spring 13 formed by bending a plate is arranged between the pad guide groove 7h and the installation piece 6c. The pad spring 13 has a first pressing part 13c pressing the guide piece 6e in the disc central direction, and a second pressing part 13d pressing the projection part 6d to the disc rotary direction side. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a pin slide type vehicle disc brake for use in a traveling vehicle of an automobile or a motorcycle, and more particularly, to a pin slide type disc brake for a pin slide type vehicle that can be manufactured at low cost and can reliably hold a friction pad. About.

  In the pin slide type vehicle disc brake, in order to manufacture it at low cost, the acting portion half body integrally including the acting portion disposed on one side of the disc rotor and the bridge portion straddling the outer periphery of the disc rotor, and the reaction Some have formed a caliper body by connecting a reaction part half body integrally provided with a friction pad on the part side with a connecting bolt. The friction pad on the working part side of the disc brake has a mounting piece protruding to the outer peripheral side of the disc, and is suspended so as to be movable in the disc axial direction by inserting the mounting piece into a pad guide groove formed in the bridge portion. (For example, refer to Patent Document 1).

In addition, the friction pads disposed on both sides of the disk rotor are suspended from hanger pins attached to the caliper body, and the friction pad is brought into contact with the disk rotor side surface of the bridge portion on the disk rotor side surface. Some have provided pad springs to be pressed in the disk axial direction and the disk delivery side to suppress backlash of the friction pads (see, for example, Patent Document 2).
JP 2006-13561 A JP 2004-132449 A

  However, in the above-mentioned Patent Document 1, although the disc brake can be manufactured at a low cost, there is a gap between the pad guide groove formed on the bridge portion and the mounting piece formed on the friction pad. When a large frictional force is applied to the friction pad during braking, the friction pad may rattle and generate abnormal noise.

  Moreover, in the thing of patent document 2, although the backlash of the friction pad was suppressed, while the number of parts increased and the shape of the pad spring became complicated, cost increased.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a pin slide type vehicle disk brake that can be manufactured at a low cost with a simple structure and that can securely hold a friction pad.

  In order to achieve the above object, according to the first aspect of the present invention, an action portion including a piston disposed on one side portion of the disk rotor and a reaction force portion disposed on the other side portion of the disk rotor are provided. The reaction part is connected to the caliper body by connecting the reaction part with a bridge part arranged across the outer peripheral side of the disc rotor, and the caliper body is connected to the caliper bracket fixed to the vehicle body via the slide pin. A pad guide groove is formed in the disk axial direction on the side of the disk rotor of the bridge portion, and a mounting piece provided on a friction pad disposed across the disk rotor in the pad guide groove. In the pin slide type vehicle disc brake that is inserted and suspended so that the friction pad is movable in the disc axial direction, the pad guide groove includes a disc radial groove and the disc guide. A disk circumferential groove formed in the disk circumferential direction on the disk delivery side when the vehicle is traveling forward, and the mounting piece is inserted into the disk circumferential groove. A projecting portion projecting outward in the radial direction, and projecting from the tip of the projecting portion in the disk circumferential direction on the disk delivery side when the vehicle is traveling forward, and inserted into the disk circumferential groove, and the disk radius of the disk circumferential groove A guide piece supported by a receiving surface on the inner side in the direction, and a pad spring formed by bending a flat plate between the pad guide groove and the mounting piece. A first support portion that abuts against a disk feed-in side surface of the radial groove; a second support portion that abuts against a disc feed-out side surface of the disk circumferential groove; Is a first pressing unit for pressing direction, characterized in that the projecting portion and a second pressing portion for pressing the outlet side disk rotation.

  In the second invention, the caliper body is formed by attaching a lining to the disk rotor side of the reaction force plate serving as the reaction force portion and the action portion half body integrally including the action portion and the bridge portion. The reaction part half formed is connected by a connecting bolt inserted through the reaction part half and the bridge part.

  In a third aspect of the invention, the pad spring is an inclined surface that is widened on the reaction part side along a casting die cutting slope formed in the pad guide groove.

  In a fourth aspect of the invention, the caliper body is attached to the vehicle body such that the front end side of the disk circumferential groove of the pad guide groove faces upward in the vertical direction.

  According to the pin slide type vehicle disk brake of the first invention, the friction pad is movably supported in the disk axial direction by inserting the friction pad mounting piece into the pad guide groove formed in the bridge portion of the caliper body. In addition, since no hanger pins are used to support the friction pad, the number of parts can be reduced, and the disc brake can be manufactured at low cost. Further, since the pad guide groove and the attachment piece of the friction pad are each formed in a substantially L-shape that protrudes toward the disk delivery side during forward traveling of the vehicle, the friction pad is dragged to the disk delivery side during braking. Even if it is, there is no possibility that the mounting piece will come off from the pad guide groove, and the friction pad can be reliably suspended with a simple structure.

  The pad spring can be easily assembled to the pad guide groove by bringing the first support portion and the second support portion into contact with the disk insertion side surface and the disk extraction side surface of the pad guide groove, respectively. By the portion and the second pressing portion, it is possible to effectively suppress the friction pad from rattling during traveling and braking of the vehicle, and it is possible to prevent the generation of abnormal noise. Furthermore, this pad spring can be formed by bending a flat plate, and since the structure is not complicated, it can be manufactured at low cost.

  According to the second invention, the reaction force half is formed by sticking a lining to the reaction force plate, and is bolted to the bridge portion. The lining is not loose, the number of parts can be reduced, and the disc brake can be manufactured at a lower cost.

  According to the third aspect of the invention, since the first support portion and the second support portion of the pad spring are inclined along the mold draft formed in the pad guide groove, the assemblability of the pad spring and the friction pad is improved. Can be improved.

  According to the fourth invention, it is possible to effectively prevent dust from accumulating in the pad guide groove.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. 1 is a sectional view taken along the line II-II in FIG. 3, FIG. 2 is a sectional view taken along the line II-II in FIG. 1, FIG. 3 is a sectional view taken along the line III-III in FIG. FIG. 6 is a partially sectional plan view of the sliding disk brake. An arrow A in the figure indicates the direction of rotation of the disc rotor during forward traveling of the vehicle, and the disc rotor turn-in side and the outlet side used in the following description are cases during forward travel of the vehicle.

  The disc brake 1 includes a disc rotor 2 that rotates integrally with a wheel, a caliper bracket 3 that is fixed to a vehicle body on one side of the disc rotor 2, and a caliper bracket 3 via a pair of slide pins 4 and 4. And a caliper body 5 supported so as to be slidable in the disk axial direction, and a friction pad 6 on the working part side disposed on one side of the disk rotor 2.

  The caliper body 5 includes an action part half body 7 in which a bridge part 5b straddling the outer periphery of the disk rotor 2 is connected to an action part 5a disposed on one side of the disk rotor 2, and the other side of the disk rotor 2. The reaction part half body 8 which becomes a reaction part is comprised, and is integrally connected by the two connection bolts 9 and 9 penetrated by this reaction part half body 8 and the bridge | bridging part 5b.

  The action part half body 7 is formed with a cylinder body 7a protruding toward the counter disk rotor side and holders 7b and 7b protruding toward the disk inner peripheral side and the disk delivery side of the cylinder body 7a on the action part 5a side. A cylinder hole 7c is formed in the cylinder body 7a, and slide pin insertion holes 7d and 7d are formed in the holders 7b and 7b, respectively. A union boss part 7e and a bleeder boss part 7f projecting outward in the radial direction of the disk are provided on the bottom side of the cylinder body 7a. A union hole 7g to which a brake hose (not shown) is connected is connected to the union boss part 7e. However, a bleeder hole into which the bleeder screw 10 is screwed is formed in the bleeder boss portion 7f so as to open to the outer side in the disk radial direction of the acting portion half body 7.

  A piston 11 is movably inserted into the cylinder hole 7c, a hydraulic chamber 12 is defined at the bottom thereof, and the union hole 7g and the bleeder hole communicate with the hydraulic chamber 12. The slide pins 4 and 4 are inserted into the slide pin insertion holes 7d and 7d of the holders 7b and 7b, and the caliper body 5 slides in the disk axial direction by the guide of the slide pins 4 and 4 when braking and releasing. .

  A pad guide groove 7 h is formed in the disk axial direction in the bridge portion 5 b formed in the action portion half body 7, and the action portion side friction pad 6 is attached to the pad guide groove 7 h via a pad spring 13. .

  The pad guide groove 7h is formed so as to open to the disk center side and the reaction part half body 8 side, and is continuous to the disk radial groove 7i and the bottom of the disk radial groove 7i. A disk circumferential groove 7k formed in the direction is provided, and a receiving surface 7m is formed on the inner side in the disk radial direction of the disk circumferential groove 7k, and is formed in a substantially L-shaped cross section. Further, on both sides in the disk circumferential direction of the pad guide groove 7h, female screw holes 7n and 7n for connecting bolts are formed in the disk axial direction, respectively. Further, as shown in FIGS. 2 to 4, the peripheral surface of the pad guide groove 7h is formed with a casting die draft for removing the casting die at the time of casting the working portion half body, toward the reaction portion half body 8 strokes. The slope is expanded.

  The friction pad 6 on the action part side is composed of a lining 6a that is in sliding contact with the side surface of the disk rotor 2, and a back plate 6b made of a steel plate. A mounting piece 6c that protrudes outward in the radial direction of the disk protrudes from the center of the disk outer peripheral side of the back plate 6b of the friction pad 6. The mounting piece 6c includes a protruding portion 6d that protrudes outward in the radial direction of the disc from the central portion on the outer peripheral side of the disc of the back plate 6b, and a guide piece 6e that protrudes in the circumferential direction of the disc on the disc delivery side from the tip of the protruding portion 6d. The friction pad 6 has a guide piece 6e in the disk circumferential groove 7k of the pad guide groove 7h and a protrusion 6d in the disk radial groove 7i of the pad guide groove 7h. The disc rotor side surface of the guide piece 6e is supported by the receiving surface 7m, and is suspended so as to be movable in the disc axial direction along the pad guide groove 7h via the pad spring 13.

  The pad spring 13 is formed by bending a single plate material, and includes a first support portion 13a that abuts against a disk insertion side surface 7o of the disk radial groove 7i and a disk rotation of the disk circumferential groove 7k. A second support portion 13b that abuts on the exit surface 7p and a disc 6a that contacts the outer peripheral side surface of the protrusion 6d and presses the friction pad 6 toward the center of the disc to abut the guide piece 6e and the receiving surface 7m. 1 pressing part 13c and the 2nd press part 13d which contact | abuts the friction pad 6 to the disk delivery side by contact | abutting to the disk introduction side surface of the said protrusion part 6d are provided. Further, as shown in FIGS. 2 to 4, the first support portion 13a, the second support portion 13b of the pad spring 13, and the contact surface of the pad guide groove 7h of the first pressing portion 13c that contacts the disk outer peripheral side surface 7q. The contact portions 13e and 13e are inclined surfaces in which the opening side having an angle along the casting die cutting slope formed on the peripheral surface of the pad guide groove 7h is expanded.

  The reaction part half body 8 has the same width as the disk circumferential direction of the bridge part 5b, and the same length as the dimension from the disk outer peripheral side of the bridge part 5b to the disk inner peripheral side of the cylinder hole 7c. A lining 8b is attached to the disk rotor side of the steel reaction force plate 8a (reaction force portion), which also serves as a friction pad on the reaction portion side. Further, connecting bolt insertion holes 8c, 8c are formed through the reaction force plate 8a on the disk insertion side and the disk extraction side outside the disk rotor radial direction.

  The action part half body 7 and the reaction part half body 8 are formed by inserting the action part side friction pad 6 into the pad guide groove 7 h in which the pad spring 13 is mounted, and from the connecting bolt insertion holes 8 c and 8 c of the reaction part half body 8. The caliper body 5 is formed by inserting the connecting bolts 9 and 9 and screwing the male screws 9a and 9a of the connecting bolts 9 and 9 into the female screw holes 7n and 7n for the connecting bolt of the operating portion half body 7. .

  The caliper bracket 3 is formed in a substantially L shape including a first arm portion 3a extending to the disk delivery side of the caliper body 5 and a second arm portion 3b extending inward in the disk radial direction. A torque receiving portion 3c is formed on the disk entry side of the one arm portion 3a so as to abut against the disk delivery side surface of the action portion side friction pad 6 during braking. Slide pins 4, 4 project toward the opposite disk rotor side at two locations on the inner peripheral side of the disc of the two arms 3 b, and the slide pins 4, 4 are inserted into the slide pin insertion holes of the working portion half 7. 7d and 7d are inserted respectively. Mounting bolts (not shown) are inserted through the vehicle body mounting holes 3d and 3d, and the caliper bracket 3 is fixed to the vehicle body by screwing the mounting bolts to the vehicle body. The body 5 is attached to the vehicle body in a movable state. Further, when the caliper body 5 is attached to the vehicle body via the caliper bracket 3, the tip end side of the disk circumferential groove 7k of the pad guide groove 7h is attached so as to face upward in the vertical direction.

  By attaching the caliper body 5 to the caliper bracket 3 in this way, the friction pad 6 on the action side is pressed toward the center of the disk by the first pressing portion 13c of the pad spring 13, and the guide piece 6e and the receiving surface 7m are always in contact. In addition to being in contact with each other, the second pressing portion 13 d is in a state in which the disk delivery side surface 6 f is pressed against the torque receiving portion 3 c of the caliper bracket 3.

  As described above, the disc brake 1 of the present embodiment inserts the attachment piece 6c of the friction pad 6 into the pad guide groove 7h formed in the bridge portion 5b, and supports the friction pad 6 so as to be movable in the disc axial direction. Accordingly, the number of parts can be reduced without using a hanger pin to support the friction pad 6, and the reaction part half body 8 also serves as a friction pad on the reaction part side. 8 can be simplified, and the disc brake 1 can be manufactured at low cost. The pad guide groove 7h is formed in a substantially L-shaped cross section including a disk radial groove 7i and a disk circumferential groove 7k, and the attachment piece 6c is substantially L provided with a protruding portion 6d and a guide piece 6e. Since it is formed in a letter shape, there is no risk of the mounting piece 6c coming off from the pad guide groove 7h even when the friction pad 6 is dragged to the disk delivery side during braking, and the friction pad is reliably suspended with a simple structure. can do. Further, the caliper body 5 can prevent dust from accumulating in the pad guide groove 7h by attaching the disk radial groove 7k to the vehicle body so as to face upward in the vertical direction.

  Further, the pad spring 13 is fitted into the pad guide groove 7h by fitting the first support portion 13a and the second support portion 13b to the disk insertion side surface 7o and the disk extraction side surface 7p of the pad guide groove 7h. Can be assembled easily. Furthermore, the friction pad 6 is pressed by the first pressing portion 13c and the second pressing portion 13d toward the center of the disk and pressed by the torque receiving portion 3c of the caliper bracket 3, so that the friction pad 6 is traveled and braked. It is possible to effectively suppress the rattling and prevent the generation of abnormal noise. Furthermore, since the pad spring 13 is formed by bending a flat plate, the pad spring 13 can be manufactured at a low cost because it is easy to manufacture with a simple structure. Further, since the contact portions 13e and 13e of the first support portion 13a, the second support portion 13b, and the first pressing portion 13c of the pad spring 13 are inclined along the mold drawing gradient of the pad guide groove 7h, the pad spring 13 and the friction pad 6 can be improved.

  The present invention is not limited to the case where the reaction part half also serves as the reaction part side friction pad as in the above-described embodiment, but includes a friction pad support part that supports the reaction force claw and the reaction part side friction pad. Alternatively, a reaction half may be used. Further, the bridge part may be formed integrally with the reaction part half, or may be provided with a half of the bridge part in each of the action part half and the reaction part half.

It is II sectional drawing of FIG. It is II-II sectional drawing of FIG. FIG. 3 is a sectional view taken along line III-III in FIG. 1. It is IV-IV sectional drawing of FIG. It is a front view of a disc brake showing an example of the present invention. Similarly, it is a partial cross-sectional plan view.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Disc brake, 2 ... Disc rotor, 3 ... Caliper bracket, 3a ... 1st arm part, 3b ... 2nd arm part, 3c ... Torque receiving part, 3d ... Car body mounting hole, 4 ... Slide pin, 5 ... Caliper body 5a ... Action part, 5b ... Bridge part, 6 ... Friction pad, 6a ... Lining, 6b ... Back plate, 6c ... Mounting piece, 6d ... Projection part, 6e ... Guide piece, 6f ... Disc feeding side, 7 ... Action Half part, 7a ... Cylinder body, 7b ... Holder, 7c ... Cylinder hole, 7d ... Slide pin insertion hole, 7e ... Union boss part, 7f ... Bleeder boss part, 7g ... Union hole, 7h ... Pad guide groove, 7i ... Disk Radial groove, 7k ... disk circumferential groove, 7m ... receiving surface, 7n ... female screw hole for connecting bolt, 7o ... disk feeding side surface, 7p ... disk feeding side surface, 7q ... disk outer side surface, 8 ... counter work Part half body, 8a ... reaction force plate, 8b ... lining, 8c ... connecting bolt insertion hole, 9 ... connecting bolt, 9a ... male screw, 10 ... bleeder screw, 11 ... piston, 12 ... hydraulic chamber, 13 ... pad spring, 13a ... 1st support part, 13b ... 2nd support part, 13c ... 1st press part, 13d ... 2nd press part, 13e ... Contact part

Claims (4)

An action part having a piston disposed on one side of the disk rotor and a reaction part having a reaction force part disposed on the other side of the disk rotor are arranged across the outer peripheral side of the disk rotor. A caliper body is formed by connecting at a bridge portion provided, and the caliper body is supported by a caliper bracket fixed to the vehicle body so as to be movable in the axial direction of the disc via a slide pin, and the disc rotor of the bridge portion A pad guide groove is formed in the disk axis direction on the side surface, and a mounting piece provided on a friction pad disposed with the disk rotor in between is inserted into the pad guide groove so that the friction pad can be moved in the disk axis direction. In the suspended pin slide type vehicle disc brake, the pad guide groove is continuous with the disc radial direction groove and the bottom of the disk radial direction groove so that the vehicle travels forward. A disk circumferential groove formed in the disk circumferential direction on the disk delivery side of the disk, and the mounting piece projects into the disk radial direction and is inserted into the disk circumferential groove. A guide piece that protrudes from the tip in the disk circumferential direction on the disk delivery side during forward traveling of the vehicle, is inserted into the disk circumferential groove, and is supported by a receiving surface in the disk radial direction of the disk circumferential groove. In addition, a pad spring formed by bending a flat plate is interposed between the pad guide groove and the mounting piece, and the pad spring is in contact with the disk insertion side surface of the disk radial groove. A second support portion that comes into contact with a disk delivery side surface of the disk circumferential groove, a first pressing portion that presses the guide piece toward the center of the disk, and the protruding portion. Pin slide type vehicular disk brake, characterized in that a second pressing portion for pressing the disk rotation exit side. The caliper body is a reaction part half formed by attaching a lining to the disk rotor side of a reaction force plate serving as the reaction force part, and an action part half provided integrally with the action part and the bridge part. 2. The pin slide type vehicle disc brake according to claim 1, wherein the body is connected by a connecting bolt inserted through the reaction portion half and the bridge portion. 3. The disk slide for a pin slide type vehicle according to claim 1, wherein the pad spring is a slope whose reaction part side is expanded along a casting die draft formed in the pad guide groove. . 4. The pin slide type vehicle according to claim 1, wherein the caliper body is attached to the vehicle body such that a front end side of a disk circumferential groove of the pad guide groove faces upward in a vertical direction. 5. Disc brake.

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