JP4250117B2 - Pin slide type vehicle disc brake - Google Patents

Description

  The present invention relates to a pin slide type vehicle disc brake, and more particularly, to a shape of a shim plate and an insulator attached to a back surface of a friction pad back plate of the pin slide type vehicle disc brake.

Conventionally, a friction pad used in a pin slide type vehicle disc brake such as an automobile or a motorcycle is configured by fixing a lining that is in sliding contact with a disc rotor to a metal back plate held by a caliper body or a caliper bracket. An insulator and a shim plate are attached to the back surface of the back plate. The insulator and shim plate are attached to the back plate by covering the insulator disposed on the back plate with the shim plate and engaging a plurality of claws protruding from the shim plate with the back plate. The hydraulic fluid inside the caliper body is prevented from rising as much as possible by shutting off the braking heat generated by the sliding contact with the disk rotor with an insulator (see, for example, Patent Document 1).
Japanese Utility Model Publication No. 6-85937

  However, since conventional insulators and shim plates are formed in substantially the same shape as the back plate shape and have portions that do not come into contact with pistons or reaction force claws, there are portions that do not come into contact with pistons or reaction force claws. It was a surplus weight.

  Accordingly, the present invention provides a pin slide type vehicle disc brake that can reduce the weight while retaining the functions of the insulator and the shim plate by eliminating the excessive portion of the insulator and the shim plate as much as possible. It is an object.

In order to achieve the above object, in the first invention, an action portion having a plurality of pistons disposed on one side portion of the disk rotor and a plurality of reaction force claws disposed on the other side portion of the disk rotor. A caliper body having a reaction portion having a side of the disc rotor and supported by a caliper mounting portion of a vehicle body through a slide pin on one side of the disc rotor, the action portion and the reaction portion. In a pin slide type vehicle disc brake in which a pair of friction pads are arranged opposite to each other with the disc rotor interposed therebetween, and an insulator and a shim plate covering the insulator are attached to the back surface of the friction pad. the part-side and outer edge of the insulator attached to the back plate rear surface of the friction pads of the reacting portion side so as to form the same, the friction pads of the active side and the reacting portion side The outer edge of the outer peripheral side of the disk has the same outer edge shape of the shim plate attached to the back surface of the back plate, and the insulator and the shim plate have recesses that are recessed with a smooth curve along the outer edge shape of the adjacent piston. And an outer edge portion on the inner periphery side of the disk having a concave portion that is recessed with a smooth curve along the outer edge shape of the reaction force claw adjacent to the portion, and the recess portion of the shim plate includes a plurality of portions that engage with the back plate. It is characterized by a protruding nail piece .

According to a second aspect of the present invention, there is provided an action portion having a plurality of pistons disposed on one side portion of the disk rotor, and a reaction portion having a plurality of reaction force claws disposed on the other side portion of the disk rotor. A caliper body provided is supported on one side of the disc rotor so as to be movable in the disc axial direction via a slide pin on a caliper mounting portion of a vehicle body, and the disc rotor is interposed between the action portion and the reaction portion. In a pin-slide type vehicle disc brake in which a pair of friction pads are disposed opposite to each other and an insulator and a shim plate covering the insulator are attached to the back surface of the friction pad. The outer peripheral side of the disk outer peripheral side and the disk inner peripheral side of the insulator and shim plate attached to the back surface of the disk is a recess recessed with a smooth curve along the outer edge shape of the adjacent piston. The outer peripheral side of the disk outer periphery side and the disk inner peripheral side of the insulator and shim plate attached to the back surface of the friction pad on the reaction part side is recessed with a smooth curve along the outer edge shape of the adjacent reaction force claw A plurality of claw pieces engaging with the back plate are projected from the concave portion of the shim plate .

The third invention is characterized in that, in the first invention, the shim plate on the action portion side and the shim plate on the reaction portion side are formed with different protruding directions of the claw pieces .

According to a fourth aspect of the present invention, in the above inventions, the shim plate has the claw piece protruding from the concave portion so that the concave portion of the shim plate is formed on both sides of the base portion of the claw piece. It is said.

According to the first or second invention, the shape of the insulator or the shim plate can be made a shape in which the portion that does not contact the piston or the reaction force claw is eliminated as much as possible, and the weight of the insulator and the shim plate is maintained while maintaining the function. Can be achieved.

The shim plate is formed with a claw piece in a recess where stress is likely to concentrate during braking, and the claw piece engages with the back plate to disperse the stress related to the recess while ensuring the strength of the shim plate. Weight reduction can be achieved.

According to the third aspect of the invention, the insulator on the action part side and the reaction part side can be shared, and the punching die of the shim plate on the action part side and the reaction part side can be shared, thereby reducing the cost. it can.

According to the fourth aspect of the invention, while maintaining the functions of the insulator and the shim plate, the weight can be reduced and the manufacturing cost can be reduced, and the strength of the shim plate can be secured.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. 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 of this embodiment is supported by a caliper bracket 3 fixed to the vehicle body at one side of the disc rotor 2 so that the caliper body 4 can slide in the disc axial direction via a pair of slide pins 5 and 5. A pair of friction pads 6, 6 are disposed between the action portion 4 a and the reaction portion 4 b of the caliper body 4 so as to face each other with the disc rotor 2 interposed therebetween.

  The caliper body 4 includes an action portion 4a disposed on one side of the disk rotor 2, a reaction portion 4b disposed on the other side of the disk rotor 2, and the reaction portion 4b and the action portion 4a. And a bridge portion 4c connected across the outer periphery of the two, and three cylinder holes 7, 8, and 9 are juxtaposed in the disk circumferential direction in the action portion 4a. In addition, mounting arms 4d and 4d are provided on the operating portion 4a so as to project toward the inner side in the disk radial direction and toward the disk rotor delivery side. The mounting arms 4d and 4d project from the caliper bracket 3 in the disk axial direction. By inserting the slide pins 5 and 5, the caliper body 4 is supported by the caliper bracket 3 so as to be movable in the disk axis direction.

  The cylinder holes 7, 8, 9 are formed in a bottomed cylindrical shape with an opening on the disk rotor 2 side, and the large-diameter cylinder holes 7, 9 are formed on the disk rotor outlet side and the disk rotor inlet side of the operating portion 4 a. And a small-diameter cylinder hole 8 is disposed in the center. Large-diameter piston holes 10 and 12 are inserted into the large-diameter cylinder holes 7 and 9, and small-diameter pistons 11 are inserted into the small-diameter cylinder hole 8 in a liquid-tight and movable manner. Hydraulic chambers 13 are defined at the bottoms of 7, 8, and 9, respectively.

  The reaction portion 4b is provided with four reaction force claws 14, 15, 16, and 17 so as to be opposed to both sides of the outer periphery of the cylinder holes 7, 8, and 9, and a large-diameter cylinder on the disk rotor introduction side. Reaction force claws 14.15 on the outer periphery of the hole 7, reaction force claws 15, 16 on the outer periphery of the small diameter cylinder hole 8, and reaction force claws 16, 17 on the outer periphery of the large diameter cylinder hole 9 on the disk rotor delivery side. Are arranged respectively.

  The pair of friction pads 6, 6 disposed between the action portion 4 a and the reaction portion 4 b is configured by joining four linings 18 that are in sliding contact with the side surface of the disk rotor 2 to a metal back plate 19. An insertion portion 19b provided with an insertion hole 19a for the hanger pin 20 protrudes from the back plate 19 on the upper side of the disk rotor. Further, an insulator 21 and a shim plate 22 that covers the insulator 21 are attached to the back surface of the back plate 19 of each friction pad 6, 6.

Each insulator 21 on the action part side and the reaction part side is made of a material excellent in heat insulation, such as ceramics, metal, synthetic resin, etc., and each insulator 21 on the action part side and the reaction part side is composed of a thin plate. The outer edge shape is the same, and an insertion portion 21a having an outer edge shape that follows the outer edge shape of the insertion portion 19b of the back plate 19 is provided, and the insertion hole 21b of the hanger pin 20 is formed in the insertion portion 21a. Is done. The outer edge portion 21c on the outer periphery side of the disk of each insulator 21 has a plurality of recesses 21d recessed along a smooth curve along the outer edge shape of the pistons 10 , 11 , and 12, and the outer edge portion 21c on the inner periphery side of the disk A plurality of recesses 21 d recessed along a smooth curve along the outer edge shape of the force claws 14, 15, 16, 17 are provided.

Each shim plate 22 on the action part side and reaction part side prevents brake noise during braking and uneven wear of the lining 18, and is made of a thin metal plate such as stainless steel having a relatively low thermal conductivity . The outer edge shape of each shim plate 22 on the action part side and the reaction part side is formed to be the same, and an insertion part 22a having an outer edge shape following the outer edge shape of the insertion part 19b of the back plate 19 is provided, and the insertion part 22a The hanger pin 20 has an insertion hole 22b. The outer edge portion 22c on the outer peripheral side of the disk of each shim plate 22 has a plurality of recesses 22d that are recessed along a smooth curve along the outer edge shape of the pistons 10 , 11 , and 12, and the outer edge portion 22c on the inner peripheral side of the disk is A plurality of recesses 22 d that are recessed along a smooth curve along the outer edge shape of the reaction force claws 14, 15, 16, and 17 are provided. Each recess 22d of each shim plate 22 is provided with a claw piece 22e for engaging the back plate, respectively, and the outer periphery 22c of the inner peripheral side of the disc is turned in and out of the disc rotor. Claw pieces 22f for holding the insulator are provided so as to protrude from the side end surfaces. The plurality of claw 22e, 22 f is different projecting direction in the shim plate 22 of the working portion and the reacting portion side of the shim plate 22. Each shim plate 22 has a claw piece 22e protruding from each recess 22d, whereby each recess 22d is formed on both sides of the base of the claw piece 22e. Concave portions 22g are also formed on both sides of the base ends of the four claw pieces 22f. Each shim plate 22 is provided with a plurality of through holes 22h.

  The insulator 21 and the shim plate 22 superimpose the insulator 21 on the back surface of the friction pad 6 and superimpose the shim plate 22 on the outside of the insulator 21 so that a plurality of five claw pieces 22e of the shim plate 22 are formed. By being engaged with the side surface of the back plate, the back plate 19 is integrally mounted. The friction pads 6 and 6 to which the insulator 21 and the shim plate 22 are attached are suspended so as to be movable in the disk axis direction by inserting the hanger pins 20 through the insertion holes 19a, 21b and 22b.

  The disc brake 1 thus formed has pistons 10, 11, and 12 that move in the direction of the disc rotor 2 by the hydraulic pressure supplied to the hydraulic pressure chamber 13, and a caliper body 4 that moves in the direction of the acting portion 4a by this reaction force. These frictional pawls 14, 15, 16, and 17 push both friction pads 6, 6 toward the disk rotor 2, and slide the linings 18 of both friction pads 6, 6 onto both side surfaces of the disk rotor 2. The brake action is performed by touching.

  During this braking, high temperature braking heat is generated in the lining 18, and this braking heat is transmitted to the respective back plates 19. The pistons 10, 11, and 12 are connected to the back plate 19 via the shim plate 22 and the insulator 21. Because of the contact, the transmission of braking heat to the piston side is blocked as much as possible. Further, since the pistons 10, 11, 12 and the reaction force claws 14, 15, 16, 17 contact the back plate 19 through the shim plate 22 during braking, the brake noise and the uneven wear of the lining 18 during braking are effective. Can be prevented.

  Furthermore, since the shape of the insulator 21 and the shim plate 22 is such that the portions that do not come into contact with the pistons 10, 11, 12 and the reaction force claws 14, 15, 16, 17 are eliminated as much as possible, the insulator 21 and the shim plate 22 are used. It is possible to reduce the weight while maintaining the function. The shim plate 22 is provided with an engaging claw piece 22e protruding in a recessed portion 22d of an outer edge portion 22c where stress is likely to be concentrated during braking, and the claw piece 22e engages with the back plate 19, so that the recessed portion 22d Such stress can be dispersed to reduce the weight while securing the strength of the shim plate 22. Since the shim plate 22 is provided with a claw piece 22f for holding an insulator, even if the insulator 21 is chipped or broken, the broken or broken insulator is held by the claw pieces 22f and 22f. Thus, the shim plate 22 does not fall off. Furthermore, since both insulators 21 are formed in the same shape, the insulators 21 on the action part side and the reaction part side can be shared, and both the shim plates 22 are formed in the same outer edge shape. Therefore, the punching die for the shim plate 22 on the action part side and the reaction part side can be shared, and the cost can be reduced.

  The insulator and shim plate on the action part side and the reaction part side do not need to have the same outer edge shape in particular, and the outer edge part of the action part side insulator and the shim plate is along the outer edge shape of the adjacent piston. The outer edge of the insulator and shim plate on the reaction part side may have a recessed part that is recessed with a smooth curve along the outer edge shape of the adjacent reaction force claw. It may be what you have. Moreover, the thing of 2 or more sheets which combined the same materials or different materials can also be used for an insulator.

It is a disassembled perspective view of the friction pad which shows one example of this invention. It is a front view which similarly shows an insulator. It is a front view which similarly shows a shim board. It is a front view of a disk brake similarly. It is VV sectional drawing of FIG. It is a rear view of a disk brake similarly. It is a top view of a disk brake similarly. It is VIII-VIII sectional drawing of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Disc brake, 2 ... Disc rotor, 3 ... Caliper bracket, 4 ... Caliper body, 4a ... Action part, 4b ... Reaction part, 4c ... Bridge part, 4d ... Mounting arm, 5 ... Slide pin, 6 ... Friction pad, 7, 8, 9 ... cylinder hole, 10, 11, 12 ... piston, 13 ... hydraulic chamber, 14, 15, 16, 17 ... reaction force claw, 18 ... lining, 19 ... back plate, 19a, 21b, 22b ... Insertion hole, 20 ... Hanger pin, 21 ... Insulator, 21a, 22a ... Insertion part, 21c, 22c ... Outer edge part, 21d, 22d, 22g ... Recess, 22 ... Shim plate, 22e, 22f ... Claw piece, 22h ... Through hole

Claims (4)

A caliper body having an action part having a plurality of pistons disposed on one side of the disk rotor and a reaction part having a plurality of reaction force claws disposed on the other side of the disk rotor, One side of the disc rotor is supported by a caliper mounting portion of a vehicle body through a slide pin so as to be movable in the disc axial direction, and a pair of frictions is sandwiched between the action portion and the reaction portion. In a pin slide type vehicle disk brake in which pads are arranged opposite to each other and an insulator and a shim plate covering the insulator are attached to the back surface of the friction pad, the back plate of each friction pad on the action part side and the reaction part side The outer edge shape of the shim plate attached to the back plate back surface of each friction pad on the action part side and the reaction part side while forming the outer edge shape of the insulator attached to the back surface to be the same. And the insulator and the shim plate are formed in the outer edge shape of the reaction force claw adjacent to the outer edge portion on the outer peripheral side of the disk having a concave portion recessed with a smooth curve along the outer edge shape of the adjacent piston. A plurality of claw pieces for engaging with the back plate are projected from the recess of the shim plate. Pin slide type vehicle disc brake. 2. The pin slide type vehicle disc brake according to claim 1 , wherein the shim plate on the action portion side and the shim plate on the reaction portion side are formed with different protrusion directions of the claw pieces . A caliper body having an action part having a plurality of pistons disposed on one side of the disk rotor and a reaction part having a plurality of reaction force claws disposed on the other side of the disk rotor, One side of the disc rotor is supported by a caliper mounting portion of a vehicle body through a slide pin so as to be movable in the disc axial direction, and a pair of frictions is sandwiched between the action portion and the reaction portion. In a pin slide type vehicle disc brake in which pads are arranged opposite to each other and an insulator and a shim plate covering the insulator are attached to the back surface of the friction pad, the insulator is attached to the back surface of the friction pad on the action side. And the outer peripheral side of the disk outer peripheral side and the inner peripheral side of the shim plate have recesses that are recessed with a smooth curve along the outer edge shape of the adjacent piston, and react. The outer peripheral side of the disk outer peripheral side and the inner peripheral disk side of the insulator and shim plate attached to the back surface of the back plate of the friction pad on the side has a concave portion recessed with a smooth curve along the outer edge shape of the adjacent reaction force claw , the concave portion of the shim plate, features and to Lupi down a slide type vehicular disk brake that multiple pawls for engaging the backing plate is projected. The shim plate, by the claw from the recess to project, the recess of the shim plate, any one of claims 1 to 3, characterized in that it is formed in the base on both sides of the claw piece 1 The pin slide type vehicle disc brake according to the item .

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