JP5437947B2 - Pin slide type vehicle disc brake - Google Patents

Description

  The present invention relates to a pin slide type vehicle disc brake mounted on a traveling vehicle such as an automobile or a motorcycle, and more specifically, a caliper body is mounted on a caliper bracket fixed to a vehicle body via a pair of slide pins. The present invention relates to a pin slide type vehicle disc brake that is slidably supported in an axial direction.

  Conventionally, in a pin slide type vehicle disc brake, when the friction pad is replaced or removed for maintenance, either one of the pair of slide pins is removed, and the caliper body is rotated outside the disc rotor with the other slide pin as a fulcrum. The friction pad can be attached and detached without removing the caliper body from the caliper bracket, and the friction pad on the working side and the piston are connected by a pad hold spring. There was one in which the friction pad was pulled back from the side surface of the disk rotor as it moved backward (see, for example, Patent Document 1).

JP 2001-336553 A

  However, in the above-mentioned, since the friction pad and the piston on the action part side are connected by a pad hold spring, when replacing the friction pad, one of the slide pins is removed and the other slide pin is removed. Before the caliper body is rotated to the outside of the disk rotor with the fulcrum as the fulcrum, the connection between the friction pad on the working part side and the piston has to be released, so it takes time to replace the friction pad.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a pin slide type disk brake for a vehicle that can prevent friction pads from being dragged and can easily replace the friction pads.

In order to achieve the above object, a pin slide type vehicle disk brake according to the present invention includes a bridge portion that includes an action portion disposed on one side portion of the disk rotor and a reaction portion disposed on the other side portion of the disk rotor. Are connected to each other to form a caliper body, the action part is provided with a cylinder hole, the reaction part is provided with a reaction force claw, and the action part is provided on a caliper bracket fixed to the vehicle body on one side of the disk rotor. The first and second slide pins disposed on both sides of the disk rotation direction are supported so as to be slidable in the disk axis direction, and friction pads are provided on the action part side and the reaction part side across the disk rotor. a respective pin slide type disc brake for a vehicle arranged, said friction pad of the acting portion side, the restoring force of the piston seal upon release braking Serial piston is connected to the piston by order pad hold spring is pulled back forcibly from one side of the disc rotor with to retreat, said caliper body, when opening the first sliding pin, the The caliper bracket is formed so as to be rotatable together with the friction pad on the working portion side with respect to the second slide pin, and the first slide pin side of the caliper bracket is provided with the first from the friction pad on the working portion side. A first torque receiving surface that receives the braking torque toward the slide pin and a second torque receiving surface that receives the braking torque toward the second slide pin are formed, and the first torque receiving surface is the second torque receiving surface. And the position of the second slide pin in the disc radial direction is the first torque. It is characterized by being arranged between the receiving surface and the second torque receiving surfaces.

The caliper body is formed so as to be rotatable with the friction pad on the reaction portion side about the second slide pin with respect to the caliper bracket with the first slide pin removed. On the first slide pin side, the position in the disk radial direction is the same position as the second slide pin or arranged on the outer side in the disk radial direction, from the friction pad on the reaction part side to the first slide pin side. A third torque receiving surface for receiving the braking torque to be directed is formed. Further, the second slide pin is fixed to the caliper bracket and is arranged on the inner side in the disk radial direction from the outer peripheral edge of the disk rotor, and the caliper body has a pin hole through which the second slide pin is inserted. The pin support arm provided at the tip can be extended along the outer periphery of the disk rotor by inclining inward in the disk radial direction from a continuous part where the action part and the bridge are continuous. Further, when the caliper body is rotated about the second slide pin until the caliper body comes into contact with the disk rotor, the friction pad on the action part side is more disc than the outer peripheral edge of the disc rotor. It is preferable to rotate to a state located outside in the radial direction. Furthermore, a guide surface whose outer side is inclined toward the first slide pin can be provided at the outer end of the first torque receiving surface in the radial direction of the disk. The second torque receiving surface may be disposed between the first torque receiving surface and the cylinder hole in the disk circumferential direction. Further, the reaction portion has a pair of reaction force claws arranged on the disk delivery side and the turn-in side when the vehicle is traveling forward, and the friction pad on the reaction portion side is attached to the pair of reaction force claws. The pad springs are connected by pad springs, the pad springs are attached to the back plate of the friction pad on the reaction part side, and project from the attachment parts to the disk delivery side and the disk entry side, respectively. A pair of assembling pieces that abut against the side of the counter rotor of the reaction force claw and draw the friction pad on the reaction portion side in the direction of the reaction force claw, and provided on the tip side of each assembling piece, on the outer side in the disk radial direction The pad holding spring is a back plate of the friction pad on the action portion side. In A mounting base portion to be worn and a claw piece projecting from the mounting base portion, the tip end side of the claw piece extending toward the piston bottom side while gradually expanding toward the inner peripheral wall of the piston, and the inner peripheral wall An engagement portion that contacts the inner surface of the piston is formed, and a tip portion of the engagement portion is bent inward, and the piston has an annular protrusion formed on the inner peripheral wall on the opening side, and the friction on the action portion side. The mounting base is fixed to the back plate of the pad, and the engaging portion of the claw piece inserted into the piston from the opening side of the piston is moved over the annular protrusion to the piston bottom side of the annular protrusion. It is preferable that the pad hold spring is caulked and fixed to the disk insertion side rather than the position corresponding to the piston central axis on the back surface of the back plate of the friction pad on the working part side. A projection is formed, and the caulking projection is Two apexes are arranged inside and outside the disk radial direction, and one apex is arranged on the disk entry side with respect to the two apexes. The claw pieces project from the mounting base in a T-shape. Two first claw pieces and one second claw piece having the same length and the same shape, the two first claw pieces projecting outward and inward in the disk radial direction from the attachment base, The one second claw piece protrudes toward the disk insertion side when the vehicle travels forward, and a triangular caulking hole portion that can be fitted to the caulking protrusion is formed in the attachment base portion, thereby forming a triangular shape. It is preferable that the two vertices face the direction of the two first claw pieces, and the remaining one vertex faces the direction of the one second claw piece.

  According to the disk slide brake for a pin slide type vehicle of the present invention, the friction pad on the acting side and the piston are connected by the pad hold spring, so that the friction pad can be prevented from being dragged and the friction pad is replaced. In this case, the friction pad can be easily replaced by rotating the friction pad together with the caliper body about the second slide pin with respect to the caliper bracket. In addition, since the first torque receiving surface and the second torque receiving surface that receive the braking torque from the friction pad are provided on the caliper bracket, the brake torque can be reliably received by the caliper bracket.

  Further, the first slide pin side of the caliper bracket is disposed at the same position as the second slide pin or on the outer side in the disk radial direction on the first slide pin side from the friction pad on the reaction part side to the first slide pin side. Even if the third torque receiving surface for receiving the braking torque toward the side is formed, the caliper body is configured to receive the braking torque from the friction pad on the reaction portion side by the third torque receiving surface provided on the caliper bracket. At the same time, the friction pad on the reaction portion side can be rotated with respect to the caliper bracket around the second slide pin.

  The second slide pin is fixed to the caliper bracket, and is disposed on the inner peripheral side of the disk with respect to the outer peripheral edge of the disk rotor. The caliper body has a pin hole through which the second slide pin is inserted at a tip portion. Since the pin support arm provided to the head extends from the continuous part where the action part and the bridge are continuous toward the inner side in the disk radial direction, the pin support arm uses the thickness of the action part and the bridge part. It is formed, and rigidity can be secured without having to build up the pin support arm. Further, since the second slide pin is arranged on the inner side of the disc with respect to the outer peripheral edge of the disc rotor, the pin support arm does not protrude outward in the radial direction of the disc, and the caliper body can be reduced in size. In addition, since the distance from the body mounting portion of the caliper bracket to the second slide pin can be shortened, the caliper bracket can be reduced in size and weight.

  In addition, when the caliper body is rotated about the second slide pin, the friction pad on the action portion side is rotated to a position located on the outer side in the radial direction of the disk with respect to the outer peripheral edge of the disk rotor. When replacing the pads, the friction pads do not interfere with the disk rotor, and the friction pads can be easily attached and detached.

  Further, by providing a guide surface whose outer side is inclined toward the first slide pin at the end of the first torque receiving surface on the outer side in the disk radial direction, the caliper body and the friction pad are centered on the second slide pin. When rotating with respect to the caliper bracket, the friction pad can be guided to the first torque receiving surface by the guide surface.

  Further, since the second torque receiving surface is disposed at the intermediate position in the disk circumferential direction between the first torque receiving surface and the cylinder hole, there is no need to provide a torque receiving portion on the second slide pin side of the caliper bracket. In addition, the distance from the body mounting portion of the caliper bracket to the second slide pin can be shortened, and the caliper bracket can be reduced in size and weight.

1 is a front view of a pin slide type disc brake showing a first embodiment of the present invention. It is also a plan view. It is a front view at the time of a friction pad replacement | exchange similarly. It is a rear view at the time of a friction pad replacement | exchange similarly. It is a plane sectional view similarly. It is VI-VI sectional drawing of FIG. It is VII-VII sectional drawing of FIG. It is a perspective view which shows an example of a pad hold spring. It is explanatory drawing which shows the relationship between a friction pad and a bracket. It is a rear view of a pin slide type disc brake. It is a bottom view similarly. It is XII-XII sectional drawing of FIG. It is a principal part enlarged view of FIG. It is a perspective view which shows an example of a pad spring. It is a rear view of the pin slide type disc brake using the pad spring of other shape. It is a bottom view similarly. It is XVII-XVII sectional drawing of FIG. It is a perspective view of a pad spring similarly.

  FIG. 1 to FIG. 14 are views showing a first embodiment of the pin slide type vehicle disc brake of the present invention, and an arrow A in the drawing indicates a rotation direction of the disc rotor during forward traveling of the vehicle. The disk entrance side and the exit side to be used are assumed to be when the vehicle is traveling forward.

  The disc brake 1 of this embodiment is a disc brake for an automobile, and bridges an action portion 3a arranged on one side portion of the disc rotor 2 and a reaction portion 3b arranged on the other side portion of the disc rotor 2. The caliper body 3 is formed by being connected by the portion 3c, and the caliper body 3 is arranged on the caliper bracket 4 fixed to the vehicle body on one side of the disc rotor 2, and the first slide arranged on both sides in the disc rotation direction. A pin 5 and a second slide pin 6 are supported so as to be slidable in the disk axial direction, and a pair of friction pads 7 and 8 are arranged opposite to each other with the disk rotor 2 interposed between the action part 3a and the reaction part 3b. doing.

  The caliper body 3 is formed by casting, and pin support arms 3d and 3e are projected from the disk insertion side and the extraction side of the action portion 3a. The pin support arm 3e on the disk delivery side extends from the action portion 3a in the disk delivery direction, and is formed with a bolt hole 3f through which a mounting bolt 9 for attaching the first slide pin 5 is inserted. The disk support side pin support arm 3d extends from the continuous part 3g where the action part 3a and the bridge 3c continue to incline inwardly in the disk radial direction and extend along the outer periphery of the disk rotor, and has a second slide pin at the tip. A pin insertion hole 3h through which 6 is inserted is formed. A cylinder hole 3i is formed in the action part 3a, and a piston 10 formed in a cup shape is inserted into the cylinder hole 3i so that the opening is directed toward the disk rotor. A dust seal mounting groove 3j for mounting the proximal end side of the dust seal 11 is formed on the opening side inner peripheral portion of the cylinder hole 3i, and the piston seal 12 is fitted to the cylinder hole bottom side of the dust seal mounting groove 3j. A piston seal mounting groove 3k is formed. A hydraulic chamber 13 is defined between the cylinder hole 3i and the bottom of the piston 10, and a union hole 3m communicating with the hydraulic chamber 13 and a bleeder hole (not shown) are formed on the bottom wall of the cylinder hole 3i. Is open.

  The dust seal 11 includes a base portion 11a, a tip portion 11b, and a bellows portion 11c provided between the tip portion 11b and the base portion 11a. The dust seal mounting groove 3j fits the base portion 11a of the dust seal 11 on the bottom side of the cylinder hole. A base fitting groove 3n to be worn and a bellows portion accommodating portion 3p for accommodating the bellows portion 11c of the dust seal 11 on the cylinder hole opening side are provided.

  The reaction portion 3b is provided with a pair of reaction force claws 3r and 3r arranged in parallel on the inner side in the radial direction of the disk on the disk inlet side and the disk outlet side across the gap 3q for processing the cylinder hole 3i. Circular through holes 3s and 3s are formed through the reaction force claws 3r and 3r, respectively. Furthermore, substantially rectangular recesses 3t, 3t are formed on the counter-rotor side of the reaction force claws 3r, 3r on the side of the gap 3q, and the through holes 3s, 3s are disposed in the recesses 3t, 3t. Yes.

  The caliper bracket 4 is fixed to the vehicle body, and the caliper support arm 4b projects from the disc delivery side end of the body 4a to the disc delivery side of the bridge portion 3c and straddles the outer periphery of the disc rotor 2. And a slide pin mounting portion 4c formed on the disk insertion side of the main body portion 4a. The caliper support arm 4b protrudes outward from the outer peripheral edge of the disc rotor 2 from the main body 4a, and includes a pin insertion hole 4d through which the first slide pin 5 is inserted, and the friction pad side outer surface is formed in a flat shape. A first torque receiving surface 4e that receives torque from the friction pad 7 on the action side when the vehicle moves forward and a third torque receiving surface 4f that receives torque from the friction pad 8 on the reaction side. A guide surface 4g is formed on the outer side in the disc radial direction of the first torque receiving surface 4e and the third torque receiving surface 4f. The slide pin mounting portion 4c protrudes from the main body portion 4a to the inner peripheral side of the disc with respect to the outer peripheral edge of the disc rotor 2, and has a female screw hole 4h into which the second slide pin 6 is screwed.

  The main body 4a is provided with bolt insertion holes 4i and 4i through which the vehicle body mounting bolts are inserted at both ends of the disk inlet side and the outlet side, and the bolt insertion hole 4i and the female screw hole 4h on the disk inlet side are close to each other. Placed in position. Further, pad receiving surfaces 4k and 4k for supporting the inner peripheral side surface of the friction pad 7 on the working portion side are formed on the outer peripheral side of the disc of the main body portion 4a, respectively, and further, the pad receiving surface 4k on the disk delivery side is formed. On the disk delivery side, a second torque receiving surface 4m that receives torque from the friction pad 7 on the acting portion side when the vehicle is reversing is orthogonal to the pad receiving surface 4k and to the first torque receiving surface 4e. They are parallel and formed on the inner side in the radial direction of the disk rotor.

  The piston 10 is formed with an annular protrusion 10a that protrudes inward on the inner peripheral wall on the opening side, an opening-side conical surface 10b that gradually increases in diameter from the annular protrusion 10a toward the piston opening end, and an annular protrusion. A bottom-side conical surface 10c is formed which gradually increases in diameter from the portion 10a toward the piston bottom side and continues to the inner peripheral wall of the piston. Further, a distal end fitting groove 10d for fitting the distal end portion of the dust seal 11 is formed on the outer peripheral portion of the annular protrusion 10a.

  The friction pads 7 and 8 are formed of linings 7 a and 8 a that are in sliding contact with the side surface of the disk rotor 2, and back plates 7 b and 8 b to which the linings 7 a and 8 a are attached. The back plate 7b of the friction pad 7 on the working portion side is provided with ear pieces 7c that abut against the first torque receiving surface 4e of the caliper bracket 4 on the disk delivery side, and the both sides on the inner periphery side of the disk are provided with the above-mentioned Contact surfaces 7d and 7d are formed to contact the pad receiving surfaces 4k and 4k, respectively. On the disk delivery side of the contact surface 7d on the disk delivery side, there is formed a torque transmission surface 7e that protrudes toward the inner circumference of the disk and faces the second torque receiving surface 4m. On the back surface of the back plate 7b facing the piston 10, there is formed a caulking projection 7f for caulking and fixing the pad hold spring 14. The caulking protrusion 7f is provided at the center of the disk radial direction of the back plate 7b and on the disk entry side by a dimension L1 shown in FIG. 7 rather than the position C1 corresponding to the piston center axis, and has a triangular shape. Two vertices are arranged inside and outside in the radial direction of the disk, and one vertex is arranged on the disk entry side with respect to the two vertices.

  The back plate 8b of the friction pad 8 on the reaction part side is provided with protruding ear pieces 8c and 8d on the disk delivery side and the disk delivery side. On the back surface of the back plate 8b facing the reaction force claws 3r, 3r, there are caulking projections 8e provided at the center, and projections 8f, 8f provided on the disc delivery side and disc entry side in the circumferential direction of the disc. The pad spring 15 is fixed by caulking the caulking projection 8e so as to protrude in a straight line, and the disc feeding side and disc feeding side projections 8f and 8f are formed through the reaction claws 3r and 3r. Inserted into the holes 3s and 3s, respectively.

  The pad hold spring 14 is formed by bending a thin metal plate and fixed by caulking the caulking projection 7f, and the same length protruding from the mounting base 14a in a T shape. The first claw pieces 14b and 14b and the second claw piece 14c have the same shape, and the first claw pieces 14b and 14b are arranged on the outer side and the inner side in the disk radial direction from the mounting base 14a. The second claw piece 14c and the first claw pieces 14b, 14b are orthogonal to each other. Further, the front end sides of the first claw pieces 14b, 14b and the second claw piece 14c extend to the piston bottom side while gradually expanding toward the piston inner peripheral wall, and engage with the piston inner peripheral wall at the front end side. Each of the portions 14d is formed, and the tip portion of the engaging portion 14d is formed in a tapered shape and is bent inward. The mounting base portion 14a is formed in a circular shape, and a triangular caulking hole portion 14e that can be fitted to the caulking protrusion 7f is formed in the center portion, and the caulking hole portion 14e has a triangular apex. The first claw pieces 14b and 14b and the second claw piece 14c are formed so as to face each other. As shown in FIG. 7, the pad hold spring 14 formed in this way is symmetrical in the vertical direction in FIG. 7 with respect to the auxiliary line CL1, including the caulking hole 14e.

  The pad spring 15 is formed by bending a thin metal plate, and has a base portion 15a fixed to the caulking protrusion 8e, and has the same length from both sides of the base portion 15a to the disk inlet side and the disk outlet side. A pair of assembly pieces 15b, 15b projecting in a straight line, and projecting pieces 15c, 15c provided at the tips of the assembly pieces 15b, 15b and projecting outward in the radial direction of the disk. Cutout portions 15d and 15d are formed on the outer sides in the disk radial direction of the assembly pieces 15b and 15b near 15c, respectively. Each assembly piece 15b, 15b protrudes from the base portion 15a while gradually inclining to the opposite disk rotor side, and the front end side is bent to the disk rotor side to form recesses 3t, 3t formed in the reaction force claws 3r, 3r. Elastic contact portions 15e and 15e that are elastically contacted with the bottom surfaces 3u and 3u are formed, and the front end side of the elastic contact portions 15e and 15e is slightly bent toward the opposite disk rotor side. Further, the tip portions 15f, 15f of the elastic pieces 15c, 15c that are in contact with the disk radial direction outer surfaces 3v, 3v of the recesses 3t, 3t are folded in a curved shape on the side opposite to the disk rotor. Further, a caulking hole portion 15g attached to the caulking protrusion 8e provided on the friction pad 8 is formed in the base portion 15a.

  The recess 3t formed in each reaction force claw 3r is integrally formed by a casting mold when the caliper body 3 is cast, and includes a bottom surface 3u where the elastic contact portions 15e and 15e elastically contact, and the elastic piece 15c. And the disk radial direction outer surface 3v with which the tip 15f of the disk is elastically contacted, and the corner 3w connecting the disk radial direction outer surface 3v and the bottom surface 3u is formed in a curved shape, and the curvature of the corner 3w is However, the radius CU2 of the tip portion 15f of the pad spring 15 is larger than the radius CU1 of the corner portion 3w so that the curvature of the tip portion 15f of the pad spring 15 becomes smaller, that is, as shown in FIG. Is formed. Further, the inner diameter of the through hole 3s formed in each reaction force claw 3r is formed larger than the outer diameter of the protrusions 8f, 8f of the friction pad 8, and the outer peripheral surface of the protrusions 8f, 8f and the through holes 3s, 3s. A predetermined gap is formed between the inner peripheral surface of the first and second inner peripheral surfaces.

  The assembly of the disc brake 1 formed in this way is as follows. First, the pad hold spring 14 is attached to the caulking projection 7f provided on the back plate 7b of the friction pad 7 on the acting portion side, and the first claw pieces 14b, 14b are attached. The second claw pieces 14c are attached inward and outward in the disk radial direction so as to face the disk insertion side, respectively, and the caulking protrusion 7f is caulked, and the pad hold spring 14 is fixed to the back plate 7b. Next, the first claw pieces 14 b and 14 b and the second claw piece 14 c of the pad hold spring 14 are inserted into the inside of the piston 10 from the opening side of the piston 10 inserted in the cylinder hole 3 i of the caliper body 3. The first claw pieces 14b and 14b and the second claw piece 14c are inserted into the piston while being bent along the opening-side conical surface 10b and the bottom-side conical surface 10c, and each engaging portion 14d is formed into an annular protrusion 10a. Is engaged with the piston bottom side of the annular protrusion 10a. As a result, the piston 10 and the friction pad 7 on the action part side are connected via the pad hold spring 14.

  Further, the center caulking projection 8e formed on the back plate 8b of the friction pad 8 on the reaction portion side is inserted into the caulking hole 15g of the pad spring 15 and caulked, and the pad spring 15 is fixed to the back plate 8b. The friction pad 8 is disposed on the disk rotor side of the reaction force claws 3r and 3r, and the assembly pieces 15b and 15b of the pad spring 15 and the resilient pieces 15c and 15c are disposed on the reaction disk claws 3r and 3r on the counter disk rotor side. Then, the pad spring 15 together with the friction pad 8 is inserted into the disk outer peripheral side from the disk inner peripheral tip of the reaction force claws 3r, 3r. The pad spring 15 is guided by the tip portions 15f and 15f, and the elastic pieces 15c and 15c and the tip side of the assembly pieces 15b and 15b are inserted into the recesses 3t and 3t while the assembly pieces 15b and 15b are deformed. The By this insertion, the elastic portions 15e and 15e are brought into elastic contact with the bottom surfaces 3u and 3u, and the protrusions 8f and 8f on the disk entry side and the disk delivery side are inserted into the through holes 3s and 3s formed on the reaction force claws 3r and 3r. The leading end portions 15f and 15f are elastically contacted with the disk radial direction outer surfaces 3v and 3v, so that the inner side of the protrusions 8f and 8f in the disk radial direction and the inner side of the through holes 3s and 3s in the disk radial direction come into contact. The contact portions serve as support portions P1 and P1 that support the inner side of the friction pad 8 in the disk radial direction. As a result, the friction pad 8 is pulled toward the reaction force claws 3r and 3r, and the friction pad 8 on the reaction portion side is connected to the reaction force claws 3r and 3r via the pad spring 15.

  Next, the second slide pin 6 is screwed into the female screw hole 4h of the slide pin mounting portion 4c provided in the caliper bracket 4, and the second slide pin 6 is projected to the side opposite to the disk rotor. Further, the caliper support arm 4b The first slide pin 5 is inserted into the pin insertion hole 4d, and the proximal end side of the first slide pin 5 is protruded from the open end of the pin insertion hole 4d to the opposite disk rotor side. The shaft portion of the second slide pin 6 protruding to the side opposite to the disc rotor is inserted into the pin insertion hole 3h provided in the pin support arm 3d on the disc insertion side of the caliper body 3, and the second slide pin 6 is used as a fulcrum. The caliper body 3 is rotated so that the friction pads 7 and 8 are disposed on both sides of the disk rotor 2, and the contact surfaces 7d and 7d of the friction pad 7 on the working side are brought into contact with the pad receiving surfaces 4k and 4k, respectively. At the same time, the ear piece 7c is opposed to the first torque receiving surface 4e, the torque transmitting surface 7e is opposed to the second torque receiving surface 4m, and the ear piece 8c on the disk delivery side of the friction pad 8 on the reaction portion side is set to the third torque. It is made to oppose the receiving surface 4f.

  At this time, the position of the second slide pin 6 in the disk radial direction is between the first torque receiving surface 4e and the second torque receiving surface 4m and closer to the inner periphery of the disk than the outer periphery of the disk rotor 2. Further, the position of the third torque receiving surface 4f in the disk radial direction is arranged on the outer side in the disk radial direction with respect to the second slide pin 6, and the first slide pin 5 is located on the outer peripheral edge of the disk rotor 2. Also, the friction pads 7 and 8 can be favorably rotated together with the caliper body 3 because they are also arranged on the outer peripheral side of the disk. As a result, the ear piece 7c of the friction pad 7 on the action portion side is on the first torque receiving surface 4e, the torque transmission surface 7e is on the second torque receiving surface 4m, and the ear on the disk delivery side of the friction pad 8 on the reaction portion side. The pieces 8c can be reliably opposed to the third torque receiving surface 4f. Further, a guide surface 4g whose outer side is inclined toward the first slide pin 5 is formed on the outer side in the disk radial direction of the first torque receiving surface 4e and the third torque receiving surface 4f. The ear pieces 7c, 8c of the friction pads 7, 8 can be favorably guided to the first torque receiving surface 4e and the third torque receiving surface 4f.

  Finally, the mounting bolt 9 is inserted into the bolt hole 3f provided in the pin support arm 3e on the disk delivery side of the caliper body 3, and the mounting bolt 9 is protruded from the pin insertion hole 4d. Screw onto the end. Accordingly, the caliper body 3 is attached to the caliper bracket 4 via the first slide pin 5 and the second slide pin 6 so as to be movable in the disk axial direction.

  When replacing the friction pads 7 and 8, as shown in FIGS. 3 and 4, the mounting bolt 9 is removed from the pin support arm 3e, and the first slide pin 5 is removed from the pin support arm 3e. The caliper body 3 is rotated around the second slide pin 6 in the direction of arrow B which is the outer side of the disk. In the caliper body 3, the friction pads 7 and 8 are integrally assembled via the pad hold spring 14 and the pad spring 15, and the position of the second slide pin 6 in the disk radial direction is the first torque receiving surface. 4e and the second torque receiving surface 4m, and arranged on the inner side of the disc with respect to the outer peripheral edge of the disc rotor 2, and the position of the third torque receiving surface 4f in the disc radial direction is the second Since the first slide pin 5 is disposed on the outer periphery side of the disk rotor 2 from the outer periphery of the disk rotor 2, the friction pads 7 and 8 and the caliper bracket 4 are disposed outside the slide pin 6 in the disk radial direction. If the bridge portion 3c of the caliper body 3 is rotated until it contacts the outer peripheral edge of the disk rotor 2 without interfering with the The friction pad 7 on the side can be rotated integrally with the caliper body 3 until the friction pad 7 is located on the outer side in the disk radial direction with respect to the outer peripheral edge of the disk rotor 2, and the ear piece 8d of the friction pad 8 on the reaction part side can be rotated. The part excluding a part can be in a state of being located on the outer side in the disk radial direction from the outer peripheral edge of the disk rotor 2. Here, since the lining 8a is not attached to the ear piece 8d on the disk rotor insertion side, a sufficient space in the disk axial direction can be secured. Even if the portion overlaps the disk rotor 2, the friction pad 8 can be easily replaced. Furthermore, even if the pad hold spring 14 is attached to the friction pad 7 on the acting portion in a state where the caliper body 3 is rotated until it contacts the outer peripheral edge of the disk rotor 2, the back plate 7b of the friction pad 7 is Since there is no interference with the disc rotor 2 in the disc axial direction, the friction pad 7 can be removed and easily replaced by moving the friction pad 7 toward the friction pad 8 in the disc axial direction. Further, since the opening side of the caliper body 3 can be directed upward in FIGS. 3 and 4 and a working space can be secured on the opening side of the caliper body 3, the friction pad 7 can be prevented without interfering with the disk rotor 2. , 8 can be detached, and the friction pads 7, 8 can be easily replaced.

  In the disc brake 1 assembled in this way, when the pressurized hydraulic fluid is supplied to the hydraulic chamber 13 during braking when the vehicle moves forward, the piston 10 moves in the cylinder opening direction while deforming the piston seal 12. Then, the friction pad 7 on the action portion 3 a side is pushed toward the disk rotor 2, and the lining 7 a of the friction pad 7 is pressed against one side surface of the disk rotor 2. Due to this reaction force, the caliper body 3 moves in the direction of the action portion 3a by the guidance of the first slide pin 5 and the second slide pin 6, and the friction pad 8 on the reaction portion side integrally with the reaction force claws 3r, 3r. Slide toward the disk rotor 2 and press the lining 8 a of the friction pad 8 against the other side of the disk rotor 2. At this time, the friction pad 7 on the action part side is in contact with the first torque receiving surface 4e by the ear piece 7c, and the friction pad 8 on the reaction part side is in pressure contact with the third torque receiving surface 4f. Thus, the braking torque at the time of forward braking can be satisfactorily received by the first torque receiving surface 4e and the third torque receiving surface 4f.

  Further, at the time of braking when the vehicle is moving backward, similarly to when the vehicle is moving forward, the pressurized hydraulic fluid is supplied to the hydraulic pressure chamber 13, so that the lining 7 a of the friction pad 7 on the action portion 3 a side is attached to the disc rotor 2. The lining 8a of the friction pad 8 on the reaction part side is pressed against the other side of the disk rotor 2 to the side. At this time, the friction pad 7 on the action part side has the torque transmission surface 7e in contact with the second torque receiving surface 4m, and the friction pad 8 on the reaction part side has the protrusions 8f and 8f that are inserted into the through holes 3s and 3s. By abutting on the side inner peripheral surface, the braking torque at the time of braking during reverse can be satisfactorily received by the second torque receiving surface 4m and the through holes 3s, 3s.

  Furthermore, when the brake is released, the piston 10 is retracted toward the bottom of the cylinder hole 3i by the restoring force of the piston seal 12, and accordingly, the first claw pieces 14b and 14b and the second claw piece 14c of the pad hold spring 14 are moved. Thus, the friction pad 7 on the working portion side connected to the piston 10 is forcibly pulled back from one side surface of the disk rotor 2. Further, the friction pad 8 on the reaction portion side is slid integrally with the reaction force claws 3 r and 3 r to the side opposite to the disk rotor by the pad spring 15 and is forcibly pulled back from the other side surface of the disk rotor 2.

  The present embodiment is formed as described above, and the friction pad 7 on the action part side is always pressed to the disk delivery side by the second claw piece 14c of the pad hold spring 14, and the ear piece 7c is the first torque. Since it is in a state of being pressed against the receiving surface 4e, it is possible to prevent the friction pad 7 from rattling during traveling of the vehicle or the like. Further, the pad hold spring 14 is located more than the position C1 corresponding to the piston central axis. Since the first claw pieces 14b and 14b and the second claw piece 14c are formed in the same length and shape in the same shape while being fixed to the back plate 7b on the disk insertion side, the second claw pieces 14c The reaction force that presses the friction pad 7 toward the disk delivery side can be increased. Further, since the first claw pieces 14b and 14b protrude from the mounting base portion 14a to the outer side and the inner side in the radial direction of the disc, the force acting on the friction pad 7 acts evenly in and out of the radial direction of the disc. At the time of release, the friction pad 7 can be pulled back well, and the friction pad 7 can be prevented from being dragged.

  Furthermore, the shape of the caulking projection 7f is formed in a triangular shape, and the apex of the triangle is formed so as to face the direction of the first claw pieces 14b and 14b and the second claw piece 14c, respectively, and the caulking hole portion By forming the shape of 14e into a triangular shape that can be fitted to the caulking protrusion 7f, and forming the apex of the triangle to face the first claw pieces 14b and 14b and the second claw piece 14c, respectively. When the pad hold spring 14 is fixed to the back plate, the first claw pieces 14b, 14b and the second claw piece 14c can be positioned, and the assemblability can be improved. In addition, the first claw pieces 14b, 14b and the second claw piece 14c have the same length, the same shape, and the second shape, although the pad claw spring 14 arranges the second claw piece 14c on the disk insertion side. Since the claw piece 14c and the first claw pieces 14b and 14b are formed so as to be orthogonal to each other, the claw piece 14c can be shared by the disc brakes provided on the left and right sides of the vehicle. Further, the caulking hole 14e has the above-described shape and the apex is arranged as described above, and the caulking protrusion 7f of the friction pad 7 has a shape corresponding to the caulking hole 14e. When the caulking hole portion 14e is inserted into the portion 7f, the direction of the second claw piece 14c is specified, so that it is possible to prevent the caulking in the wrong direction. In addition, the first claw pieces 14b, 14b and the second claw piece 14c can satisfactorily get over the annular protrusion 8a by the opening side conical surface 8b and the bottom side conical surface 8c. The pad hold spring 14 and the piston 8 can be easily engaged and disengaged.

  On the other hand, the friction pad 8 on the reaction portion side is formed such that the tip portions 15f and 15f of the elastic pieces 15c and 15c provided on the pad spring 15 are formed on the reaction force claws 3r and 3r. Since the side surfaces 3v and 3v are in elastic contact with each other, the friction pad 8 can be pressed against the support portions P1 and P1 in a stable state to prevent the friction pad 8 from rattling. Further, the pad spring 15 is provided with notches 15d and 15d on the outer side in the disk radial direction of the assembly pieces 15b and 15b in the vicinity of the elastic pieces 15c and 15c, thereby increasing the length of the elastic pieces 15c and 15c. Even if the length of the portion protruding from the assembly pieces 15b, 15b of the elastic pieces 15c, 15c is short, the magnitude of the elastic force can be ensured.

  Further, the pad spring 15 protrudes further to the counter-disk rotor side than the reaction force claw 3r by accommodating the front ends of the assembly pieces 15b, 15b of the pad spring 15 in the recess 3t of the reaction force claw 3r. Absent. Furthermore, when the pad spring 15 is assembled, the tip portion 15f of the elastic piece 15c serves as an insertion guide for the reaction force claw 3r, and the assembling property can be improved. In addition, the corner 3w between the disk radial direction outer side surface 3v and the bottom surface 3u of the recess 3t formed in the reaction force claw 3r and the tip 15f of the elastic piece 15c are respectively formed in a curved shape, and the tip 15f By forming the curvature smaller than the curvature of the corner portion 3w, the tip portion 15f can be surely brought into elastic contact with the outer surface 3v in the disc radial direction. Further, when the caliper body 3 is formed by casting, the recess 3t formed in the reaction force claw 3r is formed by a casting mold, so that the recess 3t can be easily formed, and the cost is reduced. be able to.

  Also, the pad spring 15 can be easily formed because the assembly pieces 15b and 15b protrude from both sides of the base portion 15a in a straight line with the same length, and the cost can be reduced. It can be used for both the left disc brake provided on the left side of the vehicle and the right disc brake provided on the right side of the vehicle. Further, since the ear pads 8c and 8d protrude from both sides, the friction pad 8 can be shared by both the left disc brake and the right disc brake.

  Furthermore, since the first torque receiving surface 4e, the second torque receiving surface 4m, and the third torque receiving surface 4f are provided on the caliper bracket 4, the brake torque can be reliably received by the caliper bracket 4. In addition, since the torque receiving surface is not formed on the second slide pin side, the distance from the bolt insertion hole 4i serving as the vehicle body mounting portion of the caliper bracket 4 to the second slide pin 6 can be shortened. The strength can be improved and the size and weight can be reduced.

  Further, the second slide pin 6 is disposed on the inner periphery side of the disc with respect to the outer periphery of the disc rotor 2, and the caliper body 3 includes a pin support arm 3d through which the second slide pin 6 is inserted and the action portion 3a. The pin support arm 3d is extended from the continuous part 3g where the bridge 3c continues and is inclined inward in the radial direction of the disk, and the pin support arm 3d is formed using the thickness of the action part 3a and the bridge part 3c. Rigidity can be ensured without increasing the thickness of 3d, and the caliper body 3 can be reduced in weight. Further, since the second slide pin 6 is disposed on the inner periphery side of the disk with respect to the outer periphery of the disk rotor 2, the pin support arm 3d does not protrude outward in the disk radial direction, and the caliper body 3 is reduced in size. Can be achieved.

  15 to 18 are disc brakes using pad springs having other shapes, and the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. .

  The pad spring 16 is formed by bending a thin metal plate, and includes a base portion 16a fixed to the caulking projection 8e, a first assembly piece 16b, and a second assembly piece 16c. The assembly piece 16b and the second assembly piece 16c are formed symmetrically with respect to the disk radial direction line passing through the center of the base portion 16a, and protrude in a straight line with the same length from both sides of the base portion 16a. . The first assembly piece 16b protrudes from the base portion 16a toward the disk delivery side while gradually inclining toward the disk rotor side, and the bottom surface of the recess 3t formed in the reaction force claw 3r is bent at the tip side toward the disk rotor side. The front end portion 16e (disc delivery side end portion) on the front end side of the elastic contact portion 16d is bent in an arc shape on the side opposite to the disc rotor. The second assembly piece 16c protrudes from the base portion 16a toward the disc rotor retraction side while gradually inclining toward the opposite disc rotor side, and the distal end side is bent toward the disc rotor side to form a recess 3t formed in the reaction force claw 3r. An elastic contact portion 16f that elastically contacts the bottom surface is provided, and a distal end portion 16g (disc-entry side end portion) on the distal end side of the elastic contact portion 16f is bent in an arc shape on the side opposite to the disc rotor. Further, the elastic pieces 16h, 16h projecting outward from the disk on the disk outer peripheral side of the elastic contact portion 16d of the first assembly piece 16b and the disk outer peripheral side of the elastic contact portion 16f of the second assembly piece 16c. Are formed, and the disk outer peripheral end portions 16i, 16i of the elastic pieces 16h, 16h abut against the disk radial outer surfaces 3v, 3v of the recesses 3t, 3t. Further, a caulking hole portion 16j attached to the caulking projection 8e provided on the friction pad 8 is formed in the base portion 16a.

  The recess 3t formed in the reaction force claw 3r on the disk delivery side includes a disk radial direction outer surface 3v with which the disk outer peripheral side tip 16i abuts, and a disk delivery side surface 3x orthogonal to the disk radial direction outer surface 3v. The disk delivery side surface 3x is provided with an escape portion E1 (gap portion) that avoids contact with the tip portion 16e of the first assembly piece 16b. On the other hand, the recess 3t formed in the reaction force claw 3r on the disk entry side is perpendicular to the disk radial direction outer side surface 3v with which the disk outer peripheral side tip 16i abuts and the disk radial direction outer side surface 3v. It includes a disk insertion side surface 3y (contact portion) with which the tip portion 16g of the attachment piece 16c contacts.

  When the caliper body 3 is assembled to the caliper bracket 4, the pad spring 16 is elastically brought into contact with the disc insertion side surface 3 y of the recess 3 t by the tip end 16 g of the pad spring 16. The ear piece 8c of the friction pad 8 on the reaction portion side and the third torque receiving surface 4f are in contact with each other, and thereby the play of the friction pad 8 can be suppressed.

  Further, the pad spring 16 has the first assembly piece 16b and the second assembly piece 16c formed symmetrically with respect to the disk radial direction line passing through the center of the base portion 16a, and the same from both sides of the base portion 16a. It is easy to form because it is only necessary to form an escape portion E1 that avoids contact with the tip portion 16e of the first assembly piece 16b on the reaction force claw 3r side. can do. Further, the pad spring 16 can be shared by both a left disc brake provided on the left side of the vehicle and a right disc brake provided on the right side of the vehicle. Further, since the ear pads 8c and 8d protrude from both sides of the friction pad 8, the friction pad 8 to which the pad spring 16 is attached can be shared by both the left disc brake and the right disc brake.

  The present invention has a structure in which the second slide pin is provided on the disk feed-in side and the first torque receiving surface and the second torque receiving surface are arranged on the disk feed-out side of the caliper bracket as in the above-described embodiment. The structure is not limited, and the second slide pin may be provided on the disk delivery side, and the first torque receiving surface and the second torque receiving surface may be disposed on the disk delivery side of the caliper bracket. In addition, a torque receiving surface that receives torque from the friction pad on the reaction portion side when the vehicle moves backward can be formed on the caliper bracket. Furthermore, the structure of the pad hold spring is not limited to the above-described embodiment, and any structure can be used as long as the friction pad and the piston on the action portion side can be detachably connected. Further, the shape of the pad spring is arbitrary, and the friction pad on the reaction portion side and the reaction force claw may not be connected by the pad spring, and the shape of the friction pad and the number of pistons are also arbitrary.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle disc brake, 2 ... Disc rotor, 3 ... Caliper body, 3a ... Action part, 3b ... Reaction part, 3c ... Bridge part, 3d, 3e ... Pin support arm, 3f ... Bolt hole, 3g ... Continuous part, 3h ... Pin insertion hole, 3i ... Cylinder hole, 3j ... Dust seal mounting groove, 3k ... Piston seal mounting groove, 3m ... Union hole, 3n ... Base fitting groove, 3p ... Bellows part housing part, 3q ... Gap part, 3r ... Reaction force claw, 3s ... through hole, 3t ... recess, 3u ... bottom surface, 3v ... disk radial outer side, 3w ... corner, 4 ... caliper bracket, 4a ... main body, 4b ... caliper support arm, 4c ... slide pin Mounting portion, 4d ... pin insertion hole, 4e ... first torque receiving surface, 4f ... third torque receiving surface, 4g ... guide surface, 4h ... female screw hole, 4i ... bolt insertion hole, 4k ... pad receiving surface, 4m ... first 2 torque receiver Surface, 5 ... 1st slide pin, 6 ... 2nd slide pin, 7, 8 ... Friction pad, 7a, 8a ... Lining, 7b, 8b ... Back plate, 7c, 8c, 8d ... Ear piece, 7d ... Contact surface , 7e ... torque transmission surface, 7f, 8e ... caulking projection, 8f ... projection, 9 ... mounting bolt, 10 ... piston, 10a ... annular projection, 10b ... opening side conical surface, 10c ... bottom conical surface, 10d ... Tip fitting groove, 11 ... dust seal, 12 ... piston seal, 13 ... hydraulic chamber, 14 ... pad hold spring, 14a ... mounting base, 14b ... first claw piece, 14c ... second claw piece, 14d ... engagement 14e: caulking hole, 15 ... pad spring, 15a ... base, 15b ... assembly piece, 15c ... bullet piece, 15d ... notch, 15e ... elastic contact part, 15f ... tip, 15g ... caulking Hole, 16 ... pad spring , 16a ... base part, 16b ... first assembly piece, 16c ... second assembly piece, 16d, 16f ... impact part, 16e, 16g ... tip part, 16h ... bullet part, 16i ... disc outer peripheral side tip part, 16j ... caulking hole

Claims (9)

A working part disposed on one side of the disk rotor and a reaction part disposed on the other side of the disk rotor are connected by a bridge part to form a caliper body, and a cylinder hole is formed in the working part, The reaction portion is provided with reaction force claws, and the action portion is provided on a caliper bracket fixed to the vehicle body on one side of the disc rotor, and a first slide pin and a second slide pin arranged on both sides of the disc rotation direction. A pin slide type vehicle disk brake that is slidably supported in the disk axial direction and has friction pads respectively disposed on the action part side and the reaction part side with the disk rotor interposed therebetween, friction pads, with the said piston is retracted by the restoring force of the piston seal upon release braking forces from one side of the disc rotor Coupled to the piston to at pads hold spring back can, said caliper body, when opening the first sliding pin, friction acting portion around the second slide pin relative to the caliper bracket The caliper bracket is formed so as to be rotatable together with the pad, and on the first slide pin side of the caliper bracket, a first torque receiving surface that receives a braking torque from the friction pad on the operating portion side toward the first slide pin side, and a second A second torque receiving surface that receives a braking torque toward the slide pin is formed, and the first torque receiving surface is disposed on the outer side in the disk radial direction than the second torque receiving surface, and the second slide in the disk radial direction. The pin is disposed between the first torque receiving surface and the second torque receiving surface. De-type vehicle for disc brakes. The caliper body is formed so as to be rotatable with the friction pad on the reaction portion side around the second slide pin with respect to the caliper bracket in a state where the first slide pin is removed, On the one slide pin side, the position in the disk radial direction is the same position as the second slide pin, or is arranged on the outer side in the disk radial direction, and braking from the friction pad on the reaction part side toward the first slide pin side 2. The pin slide type vehicle disc brake according to claim 1, wherein a third torque receiving surface for receiving torque is formed. The second slide pin is fixed to the caliper bracket and disposed on the inner side in the disk radial direction than the outer peripheral edge of the disk rotor, and the caliper body has a pin hole through which the second slide pin is inserted at a tip portion. 2. The pin support arm provided in the head is extended along the outer periphery of the disk rotor by inclining inward in the radial direction of the disk from a continuous part where the action part and the bridge are continuous. 2. The pin slide type vehicle disc brake according to 2. When the caliper body is rotated about the second slide pin until the caliper body comes into contact with the disk rotor, the friction pad on the action portion side is more in the disk radial direction than the outer peripheral edge of the disk rotor. The pin slide type vehicle disc brake according to any one of claims 1 to 3, wherein the pin brake is turned to a position located outside. 5. The pin according to claim 1, wherein a guide surface whose outer side is inclined toward the first slide pin is provided at an end of the first torque receiving surface on the outer side in the radial direction of the disk. Disc brakes for sliding vehicles. 6. The pin slide type according to claim 1, wherein the second torque receiving surface is disposed between the first torque receiving surface and the cylinder hole in a circumferential direction of the disk. Disc brake for vehicles. The reaction portion has a pair of reaction force claws arranged on the disk delivery side and the turn-in side when the vehicle travels forward, and the friction pad on the reaction portion side is padded to the pair of reaction force claws with a pad spring. The pad springs are attached to the back plate of the friction pad on the reaction part side, and project from the attachment part to the disk delivery side and the disk entry side, respectively, and the pair of reaction forces A pair of assembling pieces that abut each of the claws on the side opposite to the disk rotor and draw the friction pad on the reaction part side in the direction of the reaction force claw, and are provided on the front end side of each assembling piece and project outward in the disk radial direction. The vehicular disc brake according to any one of claims 1 to 6, further comprising an elastic piece resiliently contacting an abutting portion formed on a side of the anti-disc rotor of each reaction force claw . The pad hold spring includes an attachment base fixed to the back plate of the friction pad on the action portion side, and a claw piece protruding from the attachment base, and a tip side of the claw piece is on an inner peripheral wall of the piston. An engaging portion that extends toward the bottom of the piston while gradually expanding toward the piston and abuts against the inner peripheral wall is formed, a tip portion of the engaging portion is bent inward, and the piston The engagement portion of the claw piece inserted into the piston from the opening side of the piston, with an annular protrusion formed on the inner peripheral wall of the friction pad, the attachment base portion being fixed to the back plate of the friction pad on the action portion side The pin slide type vehicle disc brake according to any one of claims 1 to 7, wherein the pin slide type vehicular disc brake is engaged with a piston bottom side of the annular projection . A caulking protrusion for caulking and adhering the pad hold spring is formed on the disk insertion side from a position corresponding to the piston central axis on the back surface of the back surface of the friction pad on the acting side, and the caulking protrusion Is formed in a triangular shape in which two vertices are arranged inside and outside in the radial direction of the disk, and one vertex is arranged on the disk entry side with respect to the two vertices. Two first claw pieces and one second claw piece having the same length and the same shape protruding, and the two first claw pieces are respectively provided on the outer side and the inner side in the disk radial direction from the mounting base. The one second claw piece protrudes toward the disk insertion side during forward traveling of the vehicle, and a triangular caulking hole portion that can be fitted to the caulking protrusion portion is formed in the mounting base portion, The two triangle vertices are the two Oriented at first pawl piece, the remaining one vertex the one second pin sliding-type vehicular disc brake according to claim 8, wherein the facing direction of the claw piece.

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