JP2013104479A - Vehicle disk brake - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle disk brake which can surely support the internal face of a friction pad in a disk radial direction by using a friction pad support of a retainer.SOLUTION: A pair of friction pad accommodation walls 3g, 3g parallel with disk-inside/outside directions are formed at an operation part 3a of a caliper body 3, and a torque receiving face 3i is formed at the friction pad accommodation wall 3g. A friction pad 7 is accommodated between the friction pad accommodation walls 3g, 3g via the retainer 8. The retainer 8 has: a retainer part 8a laid on the torque receiving face 3i; a protrusion 8c protruding from the retainer part 8a toward the outside of the torque receiving face 3i; and a friction pad support 8e which is formed by folding an extension piece extending from the protrusion 8c to the disk rotor direction orthogonal to the retainer part 8a.

Description

  The present invention relates to a vehicle disc brake used in vehicles such as automobiles and motorcycles. More specifically, the present invention relates to housing a friction pad between a pair of friction pad housing walls provided on a caliper body, and the friction pad to the caliper. The present invention relates to a vehicle disc brake supported by a retainer attached to a body.

  Conventionally, in a disk brake for a vehicle, friction pad housing walls in the disk inner and outer direction are formed in parallel to each other at the action portion of the caliper body arranged across the disk rotor, and the friction pads are housed between the friction pad housing walls. In addition, there is a structure in which a torque receiving surface for supporting a braking torque from the friction pad is formed on the friction pad housing wall. Further, the caliper body is laid on the torque receiving surface, guides the movement of the friction pad in the disk axial direction, and supports the friction pad by contacting the inner surface of the friction pad in the disk radial direction. There has been a retainer attached so that the friction pad is supported only by the retainer (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 7-12149

  However, in the retainer of Patent Document 1 described above, the extending piece extending from the disk inner peripheral end of the retainer portion laid on the torque receiving surface is bent to the opposing friction pad housing wall side, so that the friction pad The friction pad support part that abuts against the inner surface in the radial direction of the disk is formed. However, since the retainer has a predetermined plate thickness that can support the friction pad, the retainer part is provided between the retainer part and the friction pad support part. It was difficult to bend the bent part at right angles, and the bent part was curved. Further, the friction pad has a corner portion where the torque transmission surface and the inner surface in the radial direction of the disk intersect with each other at a substantially right-angle shape, and between the corner portion, the retainer portion of the retainer and the friction pad support portion. Depending on the contact state with the bent portion, the friction pad may be rattled.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vehicle disc brake that can reliably support the inner surface of the friction pad in the radial direction of the disk by the friction pad support portion of the retainer.

  In order to achieve the above object, a vehicle disc brake according to the present invention forms a pair of friction pad housing walls parallel to the inside and outside of the disc at the action portion of the caliper body disposed across the disc rotor. A friction pad is housed between the housing walls, and a torque receiving surface for supporting a braking torque from the friction pad is formed on the friction pad housing wall, and the caliper body is laid on the torque receiving surface, In the vehicle disc brake that guides the movement of the friction pad in the disc axial direction and is attached with a retainer that contacts the inner surface of the friction pad in the radial direction of the disc and supports the friction pad, the retainer includes the torque receiver. A retainer portion laid on a surface, a projecting portion projecting from the retainer portion, and an extending piece extending from the projecting portion It is characterized in that it comprises a friction pad support portion which is formed by bending in a direction perpendicular.

  Further, the protruding portion is formed at the end of the retainer portion on the side opposite to the disc rotor, and a protruding piece protruding from the disc center side toward the side opposite to the disc rotor is bent in a direction parallel to the disc rotor. The friction pad support portion is preferably formed by bending an extending piece extending outward in the radial direction of the disc from the outer end of the protruding portion in the radial direction of the disc toward the disc rotor, It is preferable that a notch portion is formed in the base portion. Further, a bent piece parallel to the friction pad support part may be formed on the inner peripheral side of the disk with respect to the friction pad support part.

  According to the vehicle disc brake of the present invention, the friction pad support portion of the retainer is provided with a projecting portion projecting from the retainer portion to the outside of the torque receiving surface, and an extending piece extending from the projecting portion is provided on the retainer portion. Since it is formed by being bent in the orthogonal direction, the friction pad support portion can be arranged in a direction orthogonal to the retainer portion without forming a bent portion between the retainer portion and the friction pad support portion. As a result, the inner surface of the friction pad in the radial direction of the disk can be reliably supported by the friction pad support portion, and there is no possibility that the friction pad will rattle.

  Further, a protruding piece protruding in the direction opposite to the disk rotor from the end on the side opposite to the disk rotor of the retainer portion is bent in a direction parallel to the disk rotor to form a protruding portion, and an outer end in the disk radial direction of the protruding portion The extension piece extending outward in the radial direction of the disk is bent in the direction of the disk rotor to form the friction pad support part, so that the friction pad support part is located on the outer side of the torque receiving surface in the anti-disk rotor direction via the protrusion. Since the bent portion is not formed between the friction pad support portion and the retainer portion, the friction pad can be reliably supported by the friction pad support portion.

  Furthermore, the friction pad support part can be favorably folded by forming a notch part in the base part on the folding side of the protruding part. In addition, since the bent piece parallel to the friction pad support part is formed on the inner circumference side of the disk with respect to the friction pad support part, even the bent piece can receive the friction pad. It can be held more reliably.

It is a principal part expanded sectional view of the disc brake for vehicles which shows the 1st example of this invention. It is II-II sectional drawing of FIG. Similarly, it is an expanded view of a retainer. It is a perspective view of a retainer. It is a top view of the disk brake for vehicles similarly. It is a front view of the disk brake for vehicles similarly. It is VII-VII sectional drawing of FIG. It is VIII-VIII sectional drawing of FIG. It is a principal part expanded sectional view of the disc brake for vehicles which shows the 2nd form example of this invention. It is a perspective view of a retainer.

  FIGS. 1 to 8 show a first embodiment of the present invention. An arrow A indicates a rotation direction of a disk rotor that rotates integrally with a wheel when the vehicle moves forward. The side is when the vehicle is moving forward.

  The vehicle disc brake 1 according to the present embodiment is a four-pot piston-facing disc brake, and a pair of action portions 3a disposed opposite to each other with a disc rotor 2 rotating in the direction of arrow A together with the wheels when the vehicle moves forward. 3a and a caliper body 3 having a monocoque structure in which a pair of bridge portions 3b and 3b for connecting both side portions of the pair of action portions 3a and 3a in the circumferential direction of the disc rotor 2 are formed so as to straddle the outer peripheral side of the disc rotor 2 The caliper body 3 is provided with a ceiling opening 3c surrounded by the action portions 3a and 3a and the bridge portion 3b on the outer peripheral side of the disc rotor.

  A large-diameter cylinder hole 3d for accommodating the large-diameter piston 4a is provided on the disk delivery side of each operating portion 3a, 3a, and a small-diameter cylinder hole 3e for accommodating the small-diameter piston 4b is provided on the disk rotor side on the disk introduction side. Two openings are arranged side by side in the circumferential direction so as to face each other, and between the large diameter piston 4a and the bottom of the large diameter cylinder hole 3d and between the small diameter piston 4b and the bottom of the small diameter cylinder hole 3e. In the meantime, hydraulic chambers 5 are respectively defined. Further, between the adjacent large-diameter cylinder hole 3d and the small-diameter cylinder hole 3e, liquid passage holes for connecting the adjacent hydraulic chambers 5 and 5 are provided, and each hydraulic chamber 5 has a port. 3f are respectively drilled, and the ports 3f and 3f on the disk entry side are connected by a fluid passage 6 disposed across the outside of the disk rotor 2 and along the disk entry side of the action portions 3a and 3a. ing.

  The ceiling opening 3c serves as an opening for inserting the friction pad 7 between the friction pad housing walls 3g and 3g via the retainer 8, and the friction pads 7 and 7 can be inserted into both sides of the disc rotor 2. It is formed in a rectangle with a large size. In addition, a rigid member 9 that abuts the outer side of the friction pad 7 in the radial direction of the disk to prevent the friction pad 7 from coming off and reinforces the ceiling opening 3c is suspended from the ceiling opening 3c in the disk axial direction. The rigid member 9 is attached to the ceiling opening 3c by a mounting bolt 10 that is fastened in the disk axial direction from one action part 3a to the other action part 3a.

  Friction pad housing walls 3g and 3g formed in parallel with each other in the disc inner and outer directions are provided inside the disc on both sides 3h and 3h in the disc rotation direction of the ceiling opening 3c. The friction pad housing walls 3g and 3g are provided on the friction pad housing walls 3g and 3g. A torque receiving surface 3i for receiving a braking torque from the friction pad 7 is provided. Further, a mounting recess 3k for mounting the retainer 8 is formed on the outer side in the disk radial direction of the torque receiving surfaces 3i, 3i of the friction pad housing walls 3g, 3g, and screws 11 are screwed into the mounting recess 3k. A screw hole 3m is formed.

  The friction pad 7 is formed by sticking a lining 7 a that is in sliding contact with the side surface of the disk rotor 2 to a metal back plate 7 b. Torque transmission surfaces 7c and 7c that contact the torque receiving surface 3i are formed on both sides of the back plate 7b in the disk rotation direction, and the angle at which the torque transmission surfaces 7c and 7c intersect the disk radial direction inner surface 7d. The portions 7e and 7e are formed in a substantially right angle shape.

  As shown in FIG. 3, the retainer 8 is formed by bending a single plate punched into a predetermined shape, and the torque receiving surfaces 3i of the friction pad housing walls 3g, 3g on both sides of the disk rotor 2 are formed. , 3i and a pair of retainer portions 8a, 8a laid with their back surfaces in contact with each other, projecting from the disc center side end of each retainer portion 8a, 8a to the disc rotor side from the disc center side Protrusions 8c, 8c formed by bending the projecting pieces 8b, 8b on the front side of the retainer parts 8a, 8a in a direction parallel to the disk rotor 2, and the radially outer ends of the projecting parts 8c, 8c Friction pad support portions 8e formed by bending the first extending pieces 8d, 8d extending outward from the disk portion radially outward on the front side of the retainer portions 8a, 8a in a direction perpendicular to the retainer portion 8a, e and second extending pieces 8f, 8f extending outward in the disk radial direction from the disk rotor radial outer ends of the retainer portions 8a, 8a are inclined according to the shape of the mounting recess 3k. 8g, a connecting piece 8h connecting the outer sides of the retainer portions 8a, 8a in the disk rotor radial direction, and third extending pieces 8i, 8i extending from the inner end of the retainer portion 8a in the disk radial direction. Are provided on the front side of the retainer portions 8a, 8a with bent pieces 8k, 8k which are bent in parallel with the friction pad support portions 8e, 8e. Further, notches 8m and 8m are formed at the bent side of the protruding portions 8c and 8c, and insertion holes 8n and 8n of the screw 11 are formed at the mounting pieces 8g and 8g, respectively.

  The retainer 8 has mounting pieces 8g and 8g arranged in the mounting recesses 3k and 3k of the friction pad receiving walls 3g and 3g on both sides of the disc rotor 2, and the positions of the screw holes 3m and 3m and the insertion holes 8n and 8n are aligned. The screws 11 are attached to the friction pad housing walls 3g and 3g by fastening the screws 11 to the screw holes 3m, respectively. Next, the friction pad 7 is inserted between the friction pad housing walls 3g and 3g from the ceiling opening 3c. Then, with the torque transmission surface 7c disposed at a position corresponding to the torque receiving surface 3i via the retainer portion 8a, the inner surface 7d in the disk radial direction of the friction pad 7 is in contact with and supported by the friction pad support portion 8e. The friction pad 7 is housed between the friction pad housing walls 3g and 3g.

  At this time, the friction pad support portion 8e of the retainer 8 is formed by being bent in the direction perpendicular to the retainer portion 8a from the outside of the torque receiving surface 3i in the direction opposite to the disk rotor via the protruding portion 8c, and the friction pad support portion 8e and the retainer. Since no bent portion is formed between the friction pad 7 and the corner portion 8a, the corner portion 7e of the friction pad 7 is well disposed between the friction pad support portion 8e and the retainer portion 8a. The inner side surface 7d can be reliably supported by the friction pad support portion 8e, and there is no possibility that the friction pad 7 will rattle. In addition, since the notch 8m is formed in the base of the protruding portion 8c on the bending side, the friction pad support 8e can be bent well. Further, by providing a bent piece 8k parallel to the friction pad support 8e on the inner circumferential side of the disk with respect to the friction pad support 8e, deformation or the like occurs in the friction pad support 8e due to an external force, and the friction pad Even if 7 moves to the inner circumferential side of the disk, the friction pad can be received by the bent piece 8k, so that the friction pad 7 can be more reliably held by the retainer 8. Further, the friction pad support portion 8e of the present embodiment is formed by bending the first extending piece 8d extending from the protruding portion 8c once, so that the friction pad supporting portion 8e can be accurately formed with a small number of bendings. It is also possible to reduce the labor required for the bending process.

  9 and 10 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 retainer 8 of the present embodiment forms a protruding portion 8p that protrudes inward in the radial direction of the disk from the inner end of the retainer portion 8a in the radial direction of the disk, and the extended piece that extends from the tip of the protruding portion 8p After being bent at a right angle toward the retainer portion 8a, it is bent at a right angle toward the mounting piece 8g in parallel with the retainer portion 8a, and further, the tip end side is directed toward the retainer portion 8a and in a direction perpendicular to the retainer portion 8a. The friction pad support portion 8q is formed by bending.

  As described above, since the bent portion is not formed between the friction pad support portion 8q and the retainer portion 8a, the corner portion 7e of the friction pad 7 is good between the friction pad support portion 8q and the retainer portion 8a. The inner surface 7d in the disk radial direction of the friction pad 7 can be reliably supported by the friction pad support portion 8q, and there is no possibility that the friction pad 7 will rattle.

  The vehicle disc brake of the present invention is not limited to the one using the monocoque structure caliper body as in the above-described embodiment, but using a split-type opposed caliper body or a pin slide type caliper body. It can also be applied to. In addition, the retainer may not have two retainer parts connected by a connecting piece, and the shape of the attaching piece and the attaching recessed part is also arbitrary, and the attaching piece protrudes from the ceiling opening to the outer surface side of the bridge part. It can also be attached to the outer surface of the bridge part.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle disc brake, 2 ... Disc rotor, 3 ... Caliper body, 3a ... Action part, 3b ... Bridge part, 3c ... Ceiling opening part, 3d ... Large diameter cylinder hole, 3e ... Small diameter cylinder hole, 3f ... Port, 3g ... friction pad housing wall, 3h ... disk rotation direction side, 3i ... torque receiving surface, 3k ... mounting recess, 3m ... screw hole, 4a ... large diameter piston, 4b ... small diameter piston, 5 ... hydraulic chamber, 6 ... Liquid passage pipe, 7 ... Friction pad, 7a ... Lining, 7b ... Back plate, 7c ... Torque transmission surface, 7d ... Disk radial inner surface, 7e ... Corner, 8 ... Retainer, 8a ... Retainer, 8b ... Projection piece 8c ... projecting portion, 8d ... first extension piece, 8e ... friction pad support, 8f ... second extension piece, 8g ... mounting piece, 8h ... connection piece, 8i ... third extension piece, 8k ... folding Bending piece, 8m ... notch, 8n ... insertion hole, 8p ... Out portion, 8q ... friction pad support, 9 ... rigid members, 10 ... mounting bolts, 11 ... bis

Claims (4)

A pair of friction pad housing walls parallel to the inside and outside of the disc is formed in the working portion of the caliper body arranged across the disc rotor, and the friction pads are housed between the friction pad housing walls. A torque receiving surface for supporting a braking torque from the friction pad is formed on the wall, and the caliper body is laid on the torque receiving surface to guide the movement of the friction pad in the disk axial direction, and the friction In a vehicle disc brake having a retainer attached to the inner side in the disk radial direction of the pad and supporting the friction pad, the retainer includes a retainer portion laid on the torque receiving surface, and a projecting portion projecting from the retainer portion And a friction pad support portion formed by bending an extending piece extending from the protruding portion in a direction perpendicular to the retainer portion. Vehicle disc brake, characterized in that there. The projecting portion is formed at the end of the retainer portion on the side opposite to the disc rotor and a projecting piece projecting from the disc center side toward the side opposite to the disc rotor in a direction parallel to the disc rotor, 2. The vehicle according to claim 1, wherein the friction pad support portion is formed by bending an extending piece extending outwardly in the radial direction of the disc from the outer end of the protruding portion in the radial direction of the disc. Disc brake for use. 3. The vehicle disc brake according to claim 2, wherein a notch portion is formed in a base portion on the bent side of the protruding portion. The vehicle disc brake according to any one of claims 1 to 3, wherein a bent piece parallel to the friction pad support portion is formed on the inner periphery side of the disc with respect to the friction pad support portion. .

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