TW201835467A - Disc brake - Google Patents

Abstract

This disc brake comprises: an attachment member fixed to a non-rotatable part of a vehicle; a caliper supported by the attachment member and disposed so as to straddle the outer circumferential side of a disc; a pair of friction pads to be pressed against both surfaces of the disc by the caliper; and a rod-like member which is provided to the attachment member so as to be located on one end sides in the disc circumferential direction of the pair of friction pads and which extends in the disc axial direction. One of the pair of friction pads includes a support part slidably supported by the rod-like member. The attachment member includes: a first portion fixed to the vehicle; a second portion protruding from the first portion to the side opposite to the disc in the disc axial direction; and a third portion extending from the second portion in the disc radially outward direction. The rod-like member is provided to the third portion. The support part is positioned so as to overlap with the first portion in the disc axial direction.

Description

Disc brake

The present invention relates to a disc brake for braking a vehicle.

One technique is to provide a caliper bracket formed by stamping a sheet of material, a support portion for supporting the friction pad, and a direction for restricting the friction pad from moving away from the disc rotor. The restriction portion of the movement (for example, refer to Patent Document 1). [Prior Technical Literature] [Patent Literature]

Patent Document 1: Japanese Laid-Open Patent Publication No. 2013-190035

[Problems to be solved by the invention]

There is a demand for miniaturization in the disc brake.

It is an object of the present invention to provide a disc brake that can be miniaturized. [Means for solving the problem]

In order to achieve the above object, the present invention has a configuration in which a mounting member includes a second portion that is fixed to a first portion of the vehicle, and a second portion that protrudes from the first portion toward the opposite side of the disk in the axial direction of the disk, and The second portion is located at a third portion extending radially outward of the disk; the rod member is disposed at the third portion; and the support portion slidably supported by the rod member of the friction pad is disposed in the foregoing A portion overlaps the axial position of the disk. [Effect of the invention]

According to the present invention, it is possible to downsize.

The disc brake of the embodiment refers to a vehicle such as a two-wheeled vehicle or a four-wheeled vehicle, and specifically refers to a disc brake for an automatic two-wheeled vehicle. As shown in FIGS. 1 to 6, the disc brake 10 of the embodiment has a disk 11 and a mounting member 12 which is fixed to the non-rotating portion of the vehicle and disposed in the axial direction of the disk 11. And a caliper 13 supported by the mounting member 12 so as to straddle the disk 11. Further, as shown in FIG. 3, for example, the disc brake 10 has a pair of friction pads 15, 16 and brakes 17, 18.

As shown in FIG. 2 and FIG. 5, the disk 11 has a disk shape and is provided on a wheel (not shown) of a vehicle to be braked by the disk brake 10, and is integrally rotated with the wheel. Here, the axial direction of the disk 11 is the disk axial direction, the radial direction of the disk 11 is the disk radial direction, and the circumferential direction of the disk 11 is the disk circumferential direction. Moreover, the inlet side of the rotation direction R of the disk 11 when the vehicle is advancing is referred to as the disk screwing side, and the outlet side of the disk 11 in the rotation direction when the vehicle is advanced is referred to as the disk rotation side.

As shown in FIGS. 7 to 11, the mounting member 12 has a bracket 21 and a slide pin 22 which is integrally fixed to the bracket 21 after being formed by a different individual from the bracket 21. A dual-purpose pin 23 (rod member) and a boss member 24.

The bracket 21 is formed by press forming from a sheet metal of a certain thickness, and has a main body portion 31 (first portion), an intersection portion 32 (second portion), and a projecting portion 33 (third portion) ) three parts. The bracket 21 is composed of only three portions of the main body portion 31, the intersection portion 32, and the extension portion 33.

The main body portion 31 has a flat plate shape having a constant thickness as a whole, and has a substantially disk-shaped substrate portion 41 and a first projecting plate portion 42 which is a substrate portion 41 as shown in FIGS. 8 and 11 . The outer peripheral side protrudes outward along the radial direction of the substrate portion 41, and the second extended plate portion 43 projects outward from the outer peripheral side of the substrate portion 41 in the radial direction of the substrate portion 41. The angle formed by the first extension plate portion 42 and the second extension plate portion 43 is an acute angle.

Further, the main body portion 31 has a connecting plate portion 44 that connects the front ends of the first extending plate portion 42 and the second extending plate portion 43 at positions separated from the substrate portion 41, and the extension plate portion 45, It extends from the engagement position of the second extension plate portion 43 and the connection plate portion 44 toward the extension direction of the second extension plate portion 43; and the protruding plate portion 46 which is oriented from the extension plate portion 45 toward the direction in which it extends The direction of the intersection is highlighted. The angle formed by the first extending plate portion 42 and the connecting plate portion 44 is an acute angle, and the angle formed by the second extending plate portion 43 and the connecting plate portion 44 also becomes an acute angle. The protruding plate portion 46 protrudes from the extension plate portion 45 in the same direction as the direction in which the first extension plate portion 42 protrudes from the substrate portion 41.

As shown in FIG. 11, in the board|substrate part 41, the fitting hole 51 penetrated in the thickness direction is formed in the substantially center position. In the first extension plate portion 42, a screw hole 52 penetrating in the thickness direction is formed at an end portion on the opposite side of the substrate portion 41. A long long hole 53 is formed in the extension plate portion 45 along the longitudinal direction of the extension plate portion 45.

The intersection portion 32 protrudes from the end edge portion of the protruding plate portion 46 of the main body portion 31 opposite to the extension plate portion 45, and as shown in Figs. 7, 9, and 10, with respect to the main body portion 31, One side in the plate thickness direction is bent at an obtuse angle, and protrudes from the main body portion 31 toward one side in the plate thickness direction so as to intersect the main body portion 31. The intersection portion 32 is bent and smoothly connected to the main body portion 31 at the boundary portion 55 of the end edge on the side of the main body portion 31. As shown in FIG. 8, the boundary portion 55 on the side of the main body portion 31 of the intersection portion 32 is formed in a linear shape parallel to the extension plate portion 45 and the long hole 53. Since the boundary portions 55 and 56 of the intersection portion 32 are linearly parallel to the extension plate portion 45 and the long hole 53, the intersection portion 32 constituting both end edges is also extended to the extension plate portion 45 and the length. The holes 53 are linear in parallel.

As shown in FIG. 7, FIG. 9, and FIG. 10, the overhanging portion 33 has a flat plate shape having a constant thickness as a whole, and is formed in parallel with the main body portion 31 from the end edge portion of the intersecting portion 32 opposite to the main body portion 31. And projecting in the opposite direction to the main body portion 31. The intersection portion 32 is bent at an obtuse angle from one side in the thickness direction of the projecting portion 33 toward the projecting portion 33, and is inclined from the projecting portion 33 toward the side in the plate thickness direction thereof so as to intersect the projecting portion 33. protruding. The intersection portion 32 is bent and smoothly connected to the extension portion 33 by the boundary portion 56 of the end edge on the side of the extension portion 33. As shown in FIG. 8, the boundary portion 56 of the intersection portion 32 on the side of the extension portion 33 is parallel to the boundary interface 55 on the side of the main body portion 31 of the intersection portion 32. The projecting portion 33 is formed in a shape in which the tip is narrower as it goes away from the width of the intersection portion 32. As shown in FIG. 11, the extension portion 33 is formed with a screw hole 58 penetrating in the thickness direction thereof.

In the bracket 21, the main body portion 31 and the extension portion 33 are connected only by the intersection portion 32, and the intersection portion 32 is formed so as to intersect between the parallel main body portion 31 and the extension portion 33. This is formed into a step shape as shown in FIGS. 7, 9, and 10. Therefore, on the side of the main body portion 31 in the thickness direction of the overhang portion 33, a space 60 in which the position of the main body portion 31 in the thickness direction is formed and which overlaps both the intersection portion 32 and the main body portion 31 is generated. In the direction orthogonal to the thickness direction of the projecting portion 33, the space 60 is detached toward the outside except for the side of the intersecting portion 32, and the direction of the thickness of the projecting portion 33 is extended. The opposite side of the outlet 33 is detached.

As shown in FIG. 6, the boss member 24 is formed into a cylindrical shape having a large diameter outer diameter portion 61 and a small diameter outer diameter portion 62 having a smaller diameter than the large diameter outer diameter portion 61. Further, the small diameter outer diameter portion 62 is fitted and fixed to the fitting hole 51 of the main body portion 31 of the bracket 21. As shown in FIG. 7, FIG. 9, and FIG. 10, the boss member 24 is protruded from the intersection portion 32 in the thickness direction of the main body portion 31 with respect to the main body portion 31 while being attached to the bracket 21. On the side, in other words, the large diameter outer diameter portion 61 is disposed on the arrangement side of the overhang portion 33. Thereby, the boss member 24 protrudes from the main body portion 31 toward the protruding side of the intersection portion 32 in the thickness direction of the main body portion 31, in other words, toward the arrangement side of the extension portion 33.

The slide pin 22 has a rod shape and has a mounting shaft portion 65 on one end side in the axial direction thereof, and a remaining sliding shaft portion 66. As shown in FIG. 11, the slide pin 22 is fixed to the main body portion 31 by a screw hole 52 in which the attachment shaft portion 65 is screwed to the main body portion 31 of the bracket 21. The slide pin 22 is attached to the bracket 21 in the state where the attachment shaft portion 65 is attached to the bracket 21, and the thickness of the slide shaft portion 66 from the main body portion 31 toward the main body portion 31 is as shown in Figs. 7, 9, and 10. The protruding side of the intersection 32 in the direction, in other words, projects toward the arrangement side of the extension 33. The slide shaft portion 66 projects perpendicularly with respect to the main body portion 31.

The dual-purpose pin 23 has a rod shape and has a mounting shaft portion 71 located in the middle of the axial direction, a sliding shaft portion 72 on the axial side, and a torque bearing portion 73 on the other side in the axial direction. As shown in FIG. 11, the dual-purpose pin 23 is fixed to the extension portion 33 by a screw hole 58 in which the attachment shaft portion 71 is screwed to the extension portion 33 of the bracket 21. The dual-purpose pin 23 is attached to the bracket 21 in the state where the attachment shaft portion 71 is attached, and as shown in FIGS. 7 , 9 and 10 , the slide shaft portion 72 is directed from the extension portion 33 toward the extension portion 33 . The opposite side to the protruding side of the intersection portion 32 in the plate thickness direction, in other words, the opposite side to the arrangement side of the main body portion 31. Further, the torque bearing portion 73 projects from the projecting portion 33 toward the protruding portion of the intersecting portion 32 in the thickness direction of the projecting portion 33 through the space 60, in other words, toward the arrangement side of the main body portion 31. The slide shaft portion 72 and the torque bearing portion 73 of the dual-purpose pin 23 provided in the extension portion 33 extend perpendicularly with respect to the extension portion 33. The sliding shaft portion 66 of the slide pin 22 and the sliding shaft portion 72 of the dual-purpose pin 23 have the same outer diameter, and the outer diameter of the torque bearing portion 73 of the dual-purpose pin 23 is larger than the above. The slide pin 22 and the dual-purpose pin 23 are made of a material having higher rigidity than the bracket 21 and excellent wear resistance.

As shown in FIG. 1 to FIG. 4 and FIG. 6, the attachment member 12 is disposed in a state in which the bracket 21 is disposed on the outer side of the body (the opposite side of the wheel) on the one side of the disk 11 in the disk axial direction. A non-rotating portion (for example, a bottom case of a front fork) that is fixed to the vicinity of the disk 11 of the vehicle in the main body portion 31 of the bracket 21. At this time, as shown in FIG. 1 and FIG. 3, the attachment member 12 is positioned in the direction opposite to the opposite side (body outer side) of the disk 11 with respect to the main body portion 31 of the bracket 21, and is convex. In the state in which the underside of the table member 24 is disposed, the fastening member that is inserted into the long hole 53 shown in FIG. 2 and FIG. 5 of the main body portion 31 is not shown. The main body portion 31 is fixed to a non-rotating portion of the vehicle.

The bracket 21 of the mounting member 12 that is attached to the non-rotating portion of the vehicle in the mounted state is disposed such that the base portion 41 of the main body portion 31 is disposed radially inward of the disk, and the first extending plate portion 42 and The second extension plate portion 43 projects outward from the substrate portion 41 in the radial direction of the disk, so that the extension plate portion 45 goes further outward in the radial direction of the disk on the extension of the second extension plate portion 43. Extend. Thereby, the long hole 53 and the intersection portion 32 also extend in the radial direction of the disk.

Further, in the bracket 21 of the mounting member 12 in the mounted state, the second extending plate portion 43 is disposed on the disk-discharging side of the first extending plate portion 42, and the extended plate portion 45 is disposed in the second portion. The projecting plate portion 43 is further disposed on the disk unwinding side, and the intersecting portion 32 is disposed on the disk unwinding side of the torque bearing portion 73 of the dual-purpose pin 23 as shown in FIG.

Further, as shown in Figs. 1 and 3, the bracket 21 of the mounting member 12 in the mounted state is such that the intersection portion 32 faces the body outer side from the main body portion 31 in the disk axial direction, in other words, toward the opposite side of the disk 11. As shown in FIGS. 2 and 5, the projecting portion 33 is extended from the side of the intersection portion 32 opposite to the main body portion 31 toward the outer side in the radial direction of the disk and on the side in which the disk is screwed. Therefore, as shown in FIGS. 1 and 3, the intersection portion 32 and the extension portion 33 are formed in a stepped shape on the outer side of the body in the disk axial direction with respect to the main body portion 31. In other words, the projecting portion 33 is disposed outside the body of the main body portion 31 in the disk axial direction, and the space 60 on the side of the main body portion 31 in the thickness direction of the projecting portion 33 is disposed in the body of the projecting portion 33. The side, in other words, is disposed on the side of the disk 11.

Further, as shown in FIG. 5, the mounting member 12 in the mounted state is such that the screw hole 58 of the extending portion 33 is located on the outer side in the disk radial direction from the screw hole 52 of the main body portion 31, and the disk is unscrewed. The dual-purpose pin 23, which has been screwed into the screw hole 58, is tied to the outer side of the disk radially outward of the sliding pin 22 that has been screwed into the screw hole 52, and the disk is unscrewed. Further, as shown in Fig. 6, the mounting member 12 in the mounted state extends from the bracket 21 toward the opposite side (body side) of the disk 11 in a posture in which the sliding shaft portion 66 of the slide pin 22 extends in the axial direction of the disk. Out. The slide pin 22 guides the movement of the caliper 13 along the axial direction of the disk.

Further, as shown in Fig. 1, the mounting member 12 in the mounted state is in a posture in which the dual-purpose pin 23 extends in the axial direction of the disk, and the sliding shaft portion 72 is directed from the bracket 21 toward the opposite side of the disk 11 (outside of the body) The extension is made, and the torque bearing portion 73 is projected from the bracket 21 toward the disk 11 side (body inner side) through the space 60 which is expanded on the disk 11 side of the extension portion 33. The mounting member 12 in the mounted state is disposed such that the dual-purpose pin 23 is disposed on the outer side of the disk radial direction from the disk 11, and the torque bearing portion 73 is extended across the disk 11 in the axial direction of the disk. The dual-purpose pin 23 guides the movement of the sliding shaft portion 72 in the axial direction of the disk of the caliper 13, and subjects the torque bearing portion 73 to the braking torque of the friction pads 15, 16. In other words, the dual-purpose pin 23 serves as both a slide pin and a torque receiving pin.

The caliper 13 is supported by the attachment member 12 so as to be movable in the axial direction of the disk by the slide pin 22 shown in FIG. 6 and the slide shaft portion 72 of the dual-purpose pin 23 shown in FIG. A so-called pin slide type caliper. The caliper 13 has a caliper body 81 shown in FIGS. 1 to 6, a pad pin 83 shown in FIGS. 1 and 4, a piston 82 shown in FIG. 6, and a piston seal (piston). Seal) 84, and dust seal 85.

The caliper body 81 is supported by the slide pin 22 shown in FIG. 6 of the attachment member 12 and the slide shaft portion 72 of the dual-purpose pin 23 shown in FIG. 1 in a state of straddle the outer peripheral side of the disk 11. It is able to move axially towards the disc. In other words, the caliper 13 including the caliper body 81 is supported by the mounting member 12 and disposed across the outer peripheral side of the disk 11. For example, as shown in FIG. 6, the caliper body 81 has a cylinder portion 91 disposed outside the body of the disk 11 and a bridge portion 92 which is from the cylinder portion 91. The radially outer side of the disk projects toward the inner side of the body so as to pass over the radially outer side of the disk 11; and the claw portion 93 which faces from the inner side of the body of the bridge portion 92 in such a manner as to face the cylinder portion 91 The disc protrudes radially inward.

As shown in FIG. 2, the caliper body 81 is formed with a slide guide 101 so as to protrude obliquely from the intermediate position in the disk rotation direction of the cylinder portion 91 toward the disk in the radial direction of the disk. Further, the slide guide portion 102 is formed so as to protrude from the vicinity of the boundary between the bridge portion 92 and the cylinder portion 91 toward the disk unwinding side.

As shown in FIG. 6, in the slide guide portion 101, a boot holding hole 105 is formed to penetrate in the axial direction of the disk. A brake shoe 17 having a bottomed cylindrical shape is fitted to the brake shoe holding hole 105, and a sliding shaft portion 66 of the slide pin 22 is fitted to the brake shoe 17. Thereby, the slide guide 101 is slidably supported by the slide pin 22 together with the brake shoe 17.

As shown in FIG. 1, in the slide guide portion 102, a pin sliding hole 107 is formed along the axial direction of the disk from the side of the disk 11 to the intermediate position. A slide shaft portion 72 of the dual-purpose pin 23 is slidably fitted to the pin sliding hole 107. Thereby, the slide guide portion 102 is slidably supported by the slide shaft portion 72 of the dual-purpose pin 23.

As shown in FIG. 6, the brake shoe 17 has its cylindrical intermediate portion fitted into the brake shoe holding hole 105 of the slide guide portion 101, and this portion is slid integrally with the slide guide portion 101 to the slide pin. 22 is on the sliding shaft portion 66. The brake shoe 17 is such that its opening side is locked to the mounting shaft portion 65 on the bracket 21 side of the slide pin 22. The brake shoe 17 covers a whole portion extending from the bracket 21 of the slide pin 22 toward the opposite side of the disk 11. The brake shoe 17 is formed in a bellows shape between the bracket 21 and the slide guide portion 101 so as to expand and contract when the slide guide portion 101 of the caliper 13 moves toward the slide pin 22.

As shown in FIG. 1, the brake shoe 18 is a portion that covers the portion between the bracket 21 and the slide guide portion 102 of the slide shaft portion 72 of the dual-purpose pin 23. The brake shoe 18 is formed in a bellows shape so that the sliding guide portion 102 of the caliper 13 expands and contracts when the sliding shaft portion 72 of the dual-purpose pin 23 moves, and one end portion thereof is locked to the sliding guide portion 102 of the caliper 13 The other end is locked to the mounting shaft portion 71 on the bracket 21 side of the dual-purpose pin 23.

As shown in FIG. 6, a bottomed bore 111 is formed in the cylinder portion 91. The bore 111 is formed along the axial direction of the disk so as to open toward the side of the claw portion 93. The bore 111 is such that its cylindrical inner peripheral guide surface 112 guides the axial movement of the piston 82. The bore 111 has an annular seal groove 113 which is more outwardly radially outward than the inner peripheral guide surface 112, and an annular seal groove 114 which is located in the seal groove 113. Further, the opening side of the bore 111 is more outwardly radially outward than the inner peripheral guiding surface 112. An annular piston seal 84 is disposed in the seal groove 113, and an annular dust seal 85 is disposed in the seal groove 114. The piston seal 84 and the dust seal 85 are such that the piston 82 is fitted inside to seal the gap between the piston 82 and the bore 111.

As shown in FIG. 1 and FIG. 2, a protruding portion 121 that protrudes toward the disk-injecting side is formed on the outer side in the radial direction of the disk of the cylinder portion 91 and on the disk-injecting side, and as shown in FIGS. 1 and 5, On the screw-in side of the claw portion 93, a protruding portion 122 that protrudes toward the screw-in side of the disk is also formed.

As shown in FIG. 1, the protruding portion 121 is formed with a screw hole 125 penetrating in the axial direction of the disk, and the protruding portion 122 is formed with a through hole 126 penetrating in the axial direction of the disk. The spacer pin 83 is inserted into the through hole 126 of the protruding portion 122 and screwed into the screw hole 125 of the protruding portion 121 and attached to the caliper body 81. The spacer pin 83 connects the protruding portion 121 and the protruding portion 122 in a state of being attached to the caliper body 81 in this manner, and extends in the axial direction of the disk. The spacer pin 83 is disposed on the outer side in the disk radial direction of the disk 11, and is disposed on the disk insertion side of the bridge portion 92 and the claw portion 93 so as to straddle the disk 11.

As shown in FIGS. 4 and 6, the friction pad 15 refers to a friction pad disposed on the outer side of the body between the disk 11 and the piston 82 and the cylinder portion 91. The friction pad 16 is disposed on the disk. A friction pad on the inside of the body between the other side of the 11 and the claw portion 93. The friction pads 15 and 16 are composed of a back plate 131 of the same shape and a friction material 132 of the same shape bonded to the back plate 131. The bonding surface of the friction material 132 to the back plate 131 is reversed from the front and back. In other words, the friction pads 15, 16 are formed in a mirror symmetrical shape.

Here, the friction pad 15 on the outer side of the body will be described with reference to Figs. 12 to 16 . As shown in FIG. 12 to FIG. 16 , the back plate 131 is formed of a sheet material having a certain thickness as a whole, and as shown in FIG. 13 , has a main plate portion 135 which is a friction material 132 and a wrist. The plate portion 136 protrudes outward from the one side in the width direction of one side in the longitudinal direction of the main plate portion 135, and a wrist portion (support portion) 137 which is different from the length of the main plate portion 135. One side of the width direction of one side protrudes outward along the length direction. The wrist plate portion 136 is formed with a pin hole 141 penetrating in the thickness direction of the back plate 131, and the wrist plate portion 137 is formed to be concave from the opposite side of the main plate portion 135 toward the main plate portion 135 in the thickness direction of the back plate 131. The concave portion 142 of the shape of the crucible. By forming the concave portion 142, the end portion of the wrist plate portion 137 opposite to the main plate portion 135 has a base portion 143 on the side of the main plate portion 135, and a pair of protruding portions 144, 145 which are from the base portion 143 toward the main plate. The opposite direction of the portion 135 is highlighted. The pin hole 141 of the wrist plate portion 136 is a square hole that is long in the longitudinal direction of the main plate portion 135.

As shown in FIG. 6, the friction pad 15 which is one of the pair of friction pads 15 and 16 is disposed such that the friction material 132 is disposed on the disk 11 side, and the back plate 131 is disposed in the cylinder portion. As shown in FIG. 1, the wrist plate portion 136 of the back plate 131 is disposed on the disk insertion side, and the wrist plate portion 137 is placed on the disk rotation side. In this state, the friction pad 15 is such that the pad pin 83 of the caliper 13 is inserted into the pin hole 141 of the wrist plate portion 136, and a part of the torque bearing portion 73 of the dual-purpose pin 23 is entered into the wrist plate portion 137. Concave portion 142. Thereby, the friction pad 15 is supported by the pad pin 83 so as to be slidable in the axial direction of the disk in a state where the movement of the disk in the circumferential direction and the radial direction of the disk is substantially restricted. The wrist portion 137 is slidably supported by the torque bearing portion 73 of the dual-purpose pin 23 in the axial direction of the disk.

As shown in FIG. 6, the friction pad 16 on the inner side of the body is placed on the side of the disk 11 and the back plate 131 is placed on the side of the claw portion 93, and is set as shown in FIG. The wrist plate portion 136 of the back plate 131 is placed on the disk insertion side, and the wrist plate portion 137 is placed on the disk rotation side. In this state, the friction pad 16 is such that the pad pin 83 of the caliper 13 is inserted into the pin hole 141 of the wrist plate portion 136, and a part of the torque bearing portion 73 of the dual-purpose pin 23 is entered into the recess of the wrist plate portion 137. 142. Thereby, the friction pad 16 is supported by the pad pin 83 so as to be slidable in the axial direction of the disk in a state where the movement of the disk in the circumferential direction and the radial direction of the disk is substantially restricted. The wrist portion 137 is slidably supported by the torque bearing portion 73 of the dual-purpose pin 23 in the axial direction of the disk. The dual-purpose pin 23 as the rod-shaped member including the torque bearing portion 73 is provided on the mounting member 12 and disposed on one of the pair of friction pads 15 and 16 on the circumferential side of the disk (disc side) and faces the disk Axial extension.

As shown in Fig. 5, the friction pad 15 on the outer side of the body is in the radial direction of the disk orthogonal to the central axis of the disk 11, and does not overlap with the main body portion 31 and the intersection portion 32 of the bracket but only extends The sections 33 overlap. In other words, when viewed in the axial direction of the disk, the friction pad 15 on the outer side of the body does not overlap the main body portion 31 and the intersection portion 32 of the bracket 21 but only overlaps the projecting portion 33. At this time, the friction pad 15 on the outer side of the body overlaps the arm portion 137 and the extension portion 33.

Then, the friction pad 15 disposed outside the body between the disk 11 and the bracket 21 is such that the wrist plate portion 137 is disposed in a space 60 in which the position of the disk axial direction coincides with the main body portion 31 and the intersection portion 32. This space 60 is formed on the inner side of the body of the extension portion 33 by the intersection portion 32 and the extension portion 33 being formed in a stepped shape on the outer side of the body in the disk axial direction with respect to the main body portion 31. Thereby, as shown in FIG. 1, the wrist plate portion 137 can overlap the position of the disk in the axial direction with the main body portion 31, and at least in the state where the friction material 132 is new, the position of the disk axial direction is the same as the main body. The sections 31 overlap. In other words, the wrist portion 137 which is a portion of the friction pad 15 that is supported by the dual-purpose pin 23 is disposed at a position overlapping the main body portion 31 in the axial direction of the disk. In other words, the wrist portion 137 is such that the position of the disk axial direction overlaps with the main body portion 31.

Here, the caliper 13 can be detached from the mounting member 12 and the caliper 13 in a state where the caliper 13 is supported by the sliding member 22 of the mounting member 12 and the sliding shaft portion 72 of the dual-purpose pin 23. Pads 15, 16.

As shown in FIG. 1, since the bracket 21 of the attachment member 12 is integrally disposed outside the body of the disk 11, the friction pad 16 on the inner side of the body does not interfere with the attachment member when moving radially inward of the disk. 12. Therefore, when the spacer pin 83 is pulled out from the caliper 13 with reference to Fig. 5, the wrist plate portion 136 is moved from the mounting member 12 while the wrist plate portion 136 side is moved inward in the radial direction of the disk. The torque bearing portion 73 of the 23 is separated from the screw-in side. Thereby, the friction pad 15 on the inner side of the body can be detached from the caliper 13 and the attachment member 12 in a state of being supported by the two portions.

As shown in FIG. 1, the back plate 131 of the friction pad 15 on the outer side of the body including the wrist plate portion 137 is such that the disk is axially positioned and the main body portion 31 of the mounting member 12 located radially inward of the disk. Since the intersection portions 32 are overlapped, the movement range to the inner side in the radial direction of the disk can be restricted by the main body portion 31 and the intersection portion 32. Referring to Fig. 5, when the friction pad 15 on the outer side of the body is removed, after the pad pin 83 is pulled out from the caliper 13, the side of the wrist plate portion 136 is moved toward the inner side in the radial direction of the disk. The wrist plate portion 137 is separated from the torque bearing portion 73 of the dual-purpose pin 23 of the mounting member 12 away from the disk screw-in side. At this time, since the back plate 131 of the friction pad 15 on the outer side of the body overlaps the main body portion 31 and the intersection portion 32 located on the inner side in the radial direction of the disk in the axial direction of the disk, the main body portion 31 can be used. Limit the range of movement to the radially inner side of the disc. Therefore, the friction pad 15 on the outer side of the body can be set in a range of movement that does not interfere with the main body portion 31 and the intersection portion 32, so that the wrist plate portion 137 is separated from the dual-purpose pin 23 from the screw-in side. The distance between the pin 23 and the bridge portion 92 of the caliper 13. Thereby, the friction pad 15 on the outer side of the body can be detached from the caliper 13 and the attachment member 12 in a state of being supported by the two portions. Therefore, the friction pads 15 and 16 can be detachably attached to the caliper 13 while supporting the caliper 13 and the two portions of the slide pin 22 and the dual-purpose pin 23 of the attachment member 12.

In the caliper 13, when the brake fluid is introduced into the bore 111 of the cylinder portion 91 shown in FIG. 6, the piston 82 advances in the direction of the disk 11 along the axial direction of the disk with respect to the cylinder portion 91. The friction pad 15 on the outer side of the body is pressed toward the disk 11. In this manner, the friction pad 15 is slid on the torque bearing portion 73 and the spacer pin 83 of the dual-purpose pin 23 and abuts against one surface of the disk 11 on the friction material 132. Further, the caliper 13 slides on the sliding shaft portion 66 of the slide pin 22 together with the brake shoe 17 on the slide guide portion 101 by the reaction force generated thereby, and slides on the slide guide portion 102. The slide shaft portion 72 of the dual-purpose pin 23 fitted to the pin slide hole 107 is moved in a direction in which the cylinder portion 91 is separated from the disk 11. In this manner, the claw portion 93 presses the friction pad 16 on the inner side of the body toward the disk 11. Thus, the friction pad 16 slides on the torque bearing portion 73 and the spacer pin 83 of the dual-purpose pin 23 and abuts against the other surface of the disk 11 on the friction material 132. In this manner, the caliper 13 presses the friction pads 15, 16 from both sides by the claw portion 93 and the piston 82 and presses against the disk 11, thereby braking the disk 11, in other words, the rotation of the wheel.

In the above, the pair of friction pads 15 and 16 are disposed on both sides of the disk 11 and slidably supported by the torque bearing portion 73 on the disk unwinding side of the mounting member 12 and the disk screwing side of the caliper 13 The spacer pin 83 is pressed against both sides of the disk 11 by the caliper 13.

Here, when the vehicle is braking during forward movement, the pair of friction pads 15 and 16 are pressed against the disk unwinding side by the disk 11. At this time, the pair of friction pads 15, 16 are basically the wrist plate portion 136 which does not form the pin hole 141 in the shape of a long hole, and is pressed against the pad pin 83 toward the disk unwinding side, but is located at the wrist plate portion. The base portion 143 at the bottom position of the concave portion 142 abuts against the torque bearing portion 73 of the dual-purpose pin 23 to press the torque bearing portion 73 of the dual-purpose pin 23. At this time, the torque bearing portion 73 from the pair of friction pads 15 and 16 to the dual-purpose pin 23 is connected to the center of the passing torque bearing portion 73 as viewed in the axial direction of the disk as shown in Fig. 5 . The brake load F on the unwinding side of the steering wheel is generated on a line perpendicular to the line of the center of rotation of the disk 11 and the center of the friction member 132. The intersection portion 32 provided between the main body portion 31 and the projecting portion 33 is formed so as to be inclined at a predetermined angle α with respect to the direction in which the braking load F is not parallel, as viewed in the axial direction of the disk. Further, the angle α is always formed to be 45 ̊ or less.

In the disc brake described in Patent Document 1, the caliper frame formed by press-working one sheet of material is provided with a support portion for supporting the friction pad on the outer side of the body and for restricting the outer side of the body. The friction pad faces a restriction that moves away from the disk rotor. In this configuration, the friction pad on the outer side of the body is in contact with the support portion of the caliper holder, the sliding resistance in the axial direction of the disk increases, and the drag torque becomes high. Further, in order to wear the friction pad on the outer side of the body, it is necessary to cause the support portion to protrude from the caliper holder toward the disk axial direction, and the shape is complicated and the cost is increased. Further, since the back sheets of the friction pads cannot be made common inside and outside the body, the number of parts is increased.

On the other hand, in the disc brake 10 of the embodiment, the friction pad 15 on the outer side of the support body is supported by the friction pad 16 on the inner side of the body by the two-purpose pin 23 of the attachment member 12. Thereby, the friction pad 15 on the outer side of the body is a dual-purpose pin 23 that is in line contact with the mounting member 12, and the sliding resistance in the axial direction of the disk can be suppressed, and the drag torque can be suppressed.

Further, since the friction pad 15 on the outer side of the body is supported by the dual-purpose pin 23, it is not necessary to cause the bracket 21 to protrude toward the disk axial direction in order to wear the friction pad 15 on the outer side of the corresponding body, and the bracket can be suppressed. The shape of 21 is complicated. Thus, an increase in cost can be suppressed.

Further, since the friction pads 15 and 16 of both the outer side and the inner side of the body are supported by the two-purpose pins 23 of the mounting member 12, the back plates 131 of the friction pads 15 and 16 can be made back. Common parts that are used in turn. Therefore, it is possible to reduce the cost by reducing the number of parts. Further, in the case where the disc brake 10 is disposed on the left side of the vehicle and the case where it is disposed on the right side, the back plate 131 of the friction pads 15 and 16 may be a common component.

Further, the mounting member 12 is constituted by the bracket 21 and the dual-purpose pin 23, and the dual-purpose pin 23 is provided in the extension portion 33, and the bracket 21 is fixed to the main body portion 31 of the vehicle, and is rounded from the main body portion 31. An intersection portion 32 that protrudes toward the opposite side of the disk 11 in the axial direction of the disk, and a projecting portion 33 that extends outward from the intersection portion 32 toward the radially outer side of the disk. In other words, by extending the projection portion 33 with the intersection portion 32 interposed therebetween with respect to the main body portion 31 toward the disk axial direction, the dual-purpose pin 23 is mounted, and the friction pad 15 to be supported on the outer side of the body is provided. The wrist portion 137 of the dual-purpose pin 23 is disposed at a position overlapping the main body portion 31 in the axial direction of the disk. Thereby, it is possible to miniaturize.

Moreover, the intersection 32 provided between the main body portion 31 and the extension portion 33 is a rib that serves as the reinforcing bracket 21, and the rigidity of the bracket 21 and the attachment member 12 including the bracket 21 can be improved. Thereby, it is possible to reduce braking noise caused by a disk or a wheel or the like.

Further, the intersection portion 32 is always in a direction in which the braking load F received from the pair of friction pads 15 and 16 with respect to the torque bearing portion 73 of the dual-purpose pin 23 is not parallel but is always set when the brake vehicle is moving forward. Since the angle α is formed in an inclined manner, the rigidity of the bracket 21 can be improved. Further, since the predetermined angle α is 45 ̊ or less, the rigidity of the bracket 21 is improved.

The above embodiment includes: a mounting member that is fixed to a non-rotating portion of the vehicle; and a caliper that is supported by the mounting member and disposed across the outer peripheral side of the disk; and a pair of friction pads that are Pressing on both sides of the disc by the caliper; and a rod-shaped member provided on the mounting member and disposed on one end side of the disc in the circumferential direction of the pair of friction pads and extending in the axial direction of the disc; One of the pair of friction pads includes a support portion slidably supported by the rod-shaped member, and the attachment member includes a first portion fixed to the vehicle, and the first portion is in the disk axial direction a second portion protruding toward the opposite side of the disk and a third portion extending outward from the second portion toward the disk radial direction; the rod-shaped member being disposed at the third portion; and the support portion being disposed And overlapping with the first portion at a position in the axial direction of the disk. Thereby, it can be miniaturized.

Further, the second portion is inclined at a predetermined angle to a direction of a brake load received by the rod-shaped member. Thereby, the rigidity of the mounting member can be improved.

10‧‧‧disc brake

11‧‧‧ disc

12‧‧‧Installation components

13‧‧‧ calipers

15, 16‧‧‧ Friction pad

17, 18‧‧‧ brake shoes

21‧‧‧ bracket

22‧‧‧Slide pin

23‧‧‧Double-purpose pins (rod members)

24‧‧‧Boss members

31‧‧‧ Main body (first part)

32‧‧‧Intersection (second part)

33‧‧‧Extension (third part)

41‧‧‧Parts Department

42‧‧‧First extension board

43‧‧‧Second extension board

44‧‧‧Link Board

45‧‧‧Extension plate

46‧‧‧ protruding plate

51‧‧‧ fitting holes

52, 58, 125‧‧ ‧ screw holes

53‧‧‧ long hole

55, 56‧‧ ‧ Ministry of the Realm

60‧‧‧ space

61‧‧‧ Large diameter outer diameter

62‧‧‧ Small diameter outer diameter

65, 71‧‧‧Installation shaft

66, 72‧‧‧ sliding shaft

73‧‧‧Torque Bearings

81‧‧‧ caliper body

82‧‧‧Piston

83‧‧‧Cushion pin

84‧‧‧ piston seal

85‧‧‧Dust seal

91‧‧‧ Pressure cylinder

92‧‧‧Bridge

93‧‧‧ claws

101, 102‧‧‧Sliding guide

105‧‧‧Brake boot retaining hole

107‧‧‧ Pin sliding holes

111‧‧‧镗孔

112‧‧‧Inner guidance surface

113, 114‧‧‧ sealing groove

121, 122‧‧‧ protruding parts

126‧‧‧through holes

131‧‧‧ Backboard

132‧‧‧ Friction material

135‧‧‧ Main Board

136‧‧‧Wrist Board

137‧‧‧Wrist plate (support)

141‧‧ pin hole

142‧‧‧ recess

143‧‧‧ base

144, 145‧‧ ‧ protruding parts

F‧‧‧Brake load

R‧‧‧Rotation direction

‧‧‧‧ angle

Fig. 1 is a plan view showing a disc brake of an embodiment. Fig. 2 is a front view showing the disc brake of the embodiment. Fig. 3 is a side view showing the disc brake of the embodiment. Fig. 4 is a side view showing the disc brake of the embodiment. Fig. 5 is a rear view showing the disc brake of the embodiment. Fig. 6 is a side sectional view showing the disc brake of the embodiment. Fig. 7 is a plan view showing a mounting member of the disc brake of the embodiment. Fig. 8 is a front elevational view showing the mounting member of the disc brake of the embodiment. Fig. 9 is a side view showing a mounting member of the disc brake of the embodiment. Fig. 10 is a side view showing a mounting member of the disc brake of the embodiment. Fig. 11 is a rear elevational view showing the mounting member of the disc brake of the embodiment. Fig. 12 is a plan view showing a friction pad of the disc brake of the embodiment. Fig. 13 is a front elevational view showing the friction pad of the disc brake of the embodiment. Fig. 14 is a side view showing the friction pad of the disc brake of the embodiment. Fig. 15 is a rear elevational view showing the friction pad of the disc brake of the embodiment. Fig. 16 is a perspective view showing a friction pad of the disc brake of the embodiment.

Claims (2)

A disc brake comprising: a mounting member fixed to a non-rotating portion of the vehicle; and a caliper supported by the mounting member and disposed across an outer peripheral side of the disc; and a pair of friction linings a pad which is pressed against the both sides of the disk by the caliper; and a rod-shaped member which is disposed on the one end side of the disk circumferential direction of the mounting member and disposed in the pair of friction pads and faces the disk One of the pair of friction pads includes a support portion slidably supported by the rod-shaped member; the mounting member includes a first portion fixed to the vehicle, and the first portion is a second portion of the disk that protrudes toward the opposite side of the disk in the axial direction, and a third portion that extends outward from the second portion toward the radially outer side of the disk; the rod-shaped member is disposed at the third portion; The portion is disposed at a position overlapping the first portion in the axial direction of the disk. The disc brake according to claim 1, wherein the second portion is inclined at a predetermined angle to a direction of a brake load applied by the rod member.