WO2018179754A1

WO2018179754A1 - Disc brake

Info

Publication number: WO2018179754A1
Application number: PCT/JP2018/002288
Authority: WO
Inventors: 義季岩橋; 健男雨宮
Original assignee: 日立オートモティブシステムズ株式会社
Priority date: 2017-03-27
Filing date: 2018-01-25
Publication date: 2018-10-04
Also published as: JPWO2018179754A1; TW201835467A; TWI703281B; JP6818128B2

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.
This application claims priority on March 27, 2017 based on Japanese Patent Application No. 2017-060974 filed in Japan, the contents of which are incorporated herein by reference.

There is a technology in which a caliper bracket formed by pressing a single plate material is provided with a support portion that supports the friction pad and a restriction portion that restricts the movement of the friction pad in a direction away from the disk rotor (for example, Patent Documents). 1).

Japanese Unexamined Patent Publication No. 2013-190035

ディスク Miniaturization is required for disc brakes.

The present invention provides a disc brake that can be miniaturized.

A disc brake according to an aspect of the present invention includes a mounting member that is fixed to a non-rotating portion of a vehicle, a caliper that is supported by the mounting member and disposed across an outer peripheral side of the disc, and the disc by the caliper. A pair of friction pads pressed on both sides of the disc, and a rod-like member provided on the mounting member and disposed on one end side in the disc circumferential direction of the pair of friction pads and extending in the disc axial direction. One of the friction pads includes a support portion that is slidably supported by the rod-shaped member, and the attachment member includes a first portion that is fixed to the vehicle, and the disc from the first portion. A second portion that protrudes in the axial direction on the opposite side of the disc; and a third portion that extends outward in the radial direction of the disc from the second portion. The rod-shaped member includes the third portion. Provided, the support portion is arranged at a position to wrap to the first portion and the disk axial direction.

According to the disc brake described above, it is possible to reduce the size.

It is a top view which shows the disc brake of embodiment of this invention. It is a front view which shows the disc brake of embodiment of this invention. It is a side view which shows the disc brake of embodiment of this invention. It is a side view which shows the disc brake of embodiment of this invention. It is a rear view which shows the disc brake of embodiment of this invention. It is side sectional drawing which shows the disc brake of embodiment of this invention. It is a top view which shows the attachment member of the disc brake of embodiment of this invention. It is a front view which shows the attachment member of the disc brake of embodiment of this invention. It is a side view which shows the attachment member of the disc brake of embodiment of this invention. It is a side view which shows the attachment member of the disc brake of embodiment of this invention. It is a rear view which shows the attachment member of the disc brake of embodiment of this invention. It is a top view which shows the friction pad of the disc brake of embodiment of this invention. It is a front view which shows the friction pad of the disc brake of embodiment of this invention. It is a side view which shows the friction pad of the disc brake of embodiment of this invention. It is a rear view which shows the friction pad of the disc brake of embodiment of this invention. It is a perspective view which shows the friction pad of the disc brake of embodiment of this invention.

The disc brake 10 according to the embodiment of the present invention is a disc brake for a vehicle such as a motorcycle or a four-wheeled vehicle, specifically, a motorcycle. A disc brake 10 according to an embodiment of the present invention includes a disc 11 as shown in FIGS. 1 to 6, a mounting member 12 that is fixed to a non-rotating portion of the vehicle and is disposed on one side in the axial direction of the disc 11, The caliper 13 is supported by the mounting member 12 so as to straddle the disk 11. Further, the disc brake 10 has a pair of

friction pads

15 and 16 and

boots

17 and 18, for example, as shown in FIG.

2 and 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 rotates integrally 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. In addition, the entrance side in the rotation direction R of the disk 11 when the vehicle moves forward is the disk entry side, and the exit side in the rotation direction R of the disk 11 when the vehicle moves forward is the disk delivery side.

As shown in FIGS. 7 to 11, the mounting member 12 includes a bracket 21, a slide pin 22 that is formed separately from the bracket 21, and then fixed integrally to the bracket 21, and a dual-purpose pin 23 (bar-shaped). Member) and a boss member 24.

The bracket 21 is formed by press molding from a single metal plate having a constant thickness. The bracket 21 has three parts, a main part 31 (first part), an intersecting part 32 (second part), and an extending part 33 (third part). The bracket 21 is composed of only three portions, that is, a main body portion 31, an intersection portion 32, and an extension portion 33.

The main body 31 is a flat plate having a constant thickness as a whole. As shown in FIGS. 8 and 11, the main body portion 31 includes a substantially disk-shaped substrate portion 41 and a first extension that extends outward from the outer peripheral side of the substrate portion 41 along the radial direction of the substrate portion 41. It has the board part 42 and the 2nd extension board part 43 extended outside along the radial direction of the board | substrate part 41 from the outer peripheral side of the board | substrate part 41. As shown in FIG. The angle formed by the first extension plate portion 42 and the second extension plate portion 43 is an acute angle.

The main body portion 31 is connected to the connection plate portion 44 that connects the tips of the first extension plate portion 42 and the second extension plate portion 43 at a position separated from the substrate portion 41, and to the second extension plate portion 43. An extension plate portion 45 extending in the extending direction of the second extension plate portion 43 from the joining position with the plate portion 44, and a protruding plate portion 46 slightly protruding from the extension plate portion 45 in a direction perpendicular to the extension direction. have. The angle formed by the first extending plate portion 42 and the connecting plate portion 44 is an acute angle. The angle formed by the second extending plate portion 43 and the connecting plate portion 44 is also an acute angle. The protruding plate portion 46 protrudes from the extended plate portion 45 in the same direction as the protruding direction of the first extending plate portion 42 with respect to the substrate portion 41.

As shown in FIG. 11, the board portion 41 is formed with a fitting hole 51 penetrating in the thickness direction at a substantially central position. The first extending plate portion 42 is formed with a screw hole 52 penetrating in the plate thickness direction at an end portion opposite to the substrate portion 41. A long hole 53 that is long in the length direction of the extension plate portion 45 is formed in the extension plate portion 45.

The intersecting portion 32 extends from an end edge portion of the projecting plate portion 46 of the main body portion 31 opposite to the extension plate portion 45. As shown in FIGS. 7, 9, and 10, the intersecting portion 32 is bent at an obtuse angle with respect to the main body portion 31 on one side in the plate thickness direction. The intersecting part 32 protrudes from the main part 31 to one side in the plate thickness direction so as to intersect the main part 31. The intersecting portion 32 is smoothly connected to the main portion 31 by curving the boundary portion 55 at the edge on the main portion 31 side. As shown in FIG. 8, the boundary portion 55 on the main body 31 side of the intersecting portion 32 has a linear shape parallel to the extension plate portion 45 and the elongated hole 53. Since the

boundary portions

55 and 56 of the intersecting portion 32 are linear parallel to the extension plate portion 45 and the elongated hole 53, the intersecting portion 32, which constitutes both edge portions thereof, is also the extension plate portion 45 and the elongated hole 53. Extends in a straight line.

As shown in FIG. 7, FIG. 9, and FIG. 10, the extending portion 33 is a flat plate having a constant thickness as a whole, and the main portion 31 and the main portion 31 from the opposite end of the intersecting portion 32 to the main portion 31. The main body 31 extends in the opposite direction in parallel. The intersecting portion 32 is bent at an obtuse angle from the extending portion 33 to one side in the plate thickness direction of the extending portion 33, and from the extending portion 33 to one side in the plate thickness direction so as to intersect the extending portion 33. It protrudes. The boundary part 56 of the edge of the crossing part 32 on the extension part 33 side is curved and smoothly connected to the extension part 33. As shown in FIG. 8, the boundary portion 56 on the extending portion 33 side of the intersecting portion 32 is parallel to the boundary portion 55 on the main portion 31 side of the intersecting portion 32. The extending portion 33 has a tapered shape that becomes narrower as the distance from the intersecting portion 32 increases. As shown in FIG. 11, the extending portion 33 is formed with a screw hole 58 that penetrates in the thickness direction.

In the bracket 21, the main body portion 31 and the extending portion 33 are connected only through the intersection portion 32. By forming the intersecting portion 32 between the parallel main portion 31 and the extending portion 33 so as to intersect with each other, a step shape is formed as shown in FIGS. 7, 9, and 10. Therefore, a space 60 is formed on the main portion 31 side of the extending portion 33 in the plate thickness direction so that both the intersecting portion 32 and the main portion 31 and the position of the main portion 31 in the plate thickness direction overlap. The space 60 extends outward in the direction orthogonal to the plate thickness direction of the extending portion 33 except for the intersecting portion 32 side. With respect to the plate thickness direction of the extending portion 33, what is the extending portion 33? It is missing on the other side.

As shown in FIG. 6, the boss member 24 has a stepped cylindrical shape having a large diameter outer diameter portion 61 and a smaller diameter outer diameter portion 62 smaller than this. The boss member 24 is fitted and fixed to the fitting hole 51 of the main body portion 31 of the bracket 21 at the small diameter outer diameter portion 62. 7, 9, and 10, the boss member 24 is attached to the bracket 21, as shown in FIG. 7, FIG. 9, and FIG. 10. A large-diameter outer diameter portion 61 is disposed on the arrangement side of the portion 33. Thereby, the boss member 24 protrudes from the main body portion 31 to the protruding side of the intersecting portion 32 in the plate thickness direction of the main body portion 31, that is, the arrangement side of the extending portion 33.

The slide pin 22 has a rod shape. The slide pin 22 has an attachment shaft portion 65 on one end side in the axial direction and the remaining slide shaft portion 66. As shown in FIG. 11, the slide pin 22 is fixed to the main body portion 31 by screwing the mounting shaft portion 65 into the screw hole 52 of the main body portion 31 of the bracket 21. As shown in FIGS. 7, 9, and 10, the slide pin 22 is attached to the bracket 21 at the attachment shaft portion 65, so that the slide shaft portion 66 extends from the main body portion 31 to the main body portion 31 in the plate thickness direction. It extends to the projecting side of the intersecting portion 32, that is, the arrangement side of the extending portion 33. The slide shaft portion 66 extends perpendicular to the main body portion 31.

The dual-purpose pin 23 has a rod shape. The dual-purpose pin 23 has an axially intermediate mounting shaft portion 71, a slide shaft portion 72 on one side in the axial direction, and a torque receiving shaft portion 73 on the other side in the axial direction. As shown in FIG. 11, the dual-purpose pin 23 is fixed to the extending portion 33 by screwing the mounting shaft portion 71 into the screw hole 58 of the extending portion 33 of the bracket 21. As shown in FIGS. 7, 9, and 10, the dual-purpose pin 23 is attached to the bracket 21 at the attachment shaft portion 71, so that the slide shaft portion 72 extends from the extension portion 33 to the plate thickness of the extension portion 33. It extends in the direction opposite to the protruding side of the intersecting portion 32, that is, the side opposite to the arrangement side of the main body portion 31. Further, the torque receiving shaft portion 73 extends through the space 60 from the extending portion 33 to the projecting side of the intersecting portion 32 in the plate thickness direction of the extending portion 33, that is, the arrangement side of the main body portion 31. The slide shaft portion 72 and the torque receiving shaft portion 73 of the dual-purpose pin 23 provided in the extension portion 33 extend perpendicularly to the extension portion 33. The slide shaft portion 66 of the slide pin 22 and the slide shaft portion 72 of the dual-purpose pin 23 have the same outer diameter, and the torque receiving shaft portion 73 of the dual-purpose pin 23 has a larger outer diameter than these. The slide pin 22 and the dual-purpose pin 23 are made of a material that is higher in rigidity than the bracket 21 and excellent in wear resistance.

As shown in FIG. 1 to FIG. 4 and FIG. 6, the mounting member 12 has its bracket 21 disposed on the outer side (the side opposite to the wheel) that is one surface side of the disk 11 in the disk axial direction. The main body 31 of the bracket 21 is fixed to a non-rotating portion (for example, a bottom case of a front fork) in the vicinity of the vehicle disk 11. At that time, as shown in FIGS. 1 and 3, the attachment member 12 is oriented so that the extending portion 33 is located on the side (outer side) opposite to the disk 11 with respect to the main body portion 31 of the bracket 21. In a state where an axle (not shown) is disposed inside the member 24, the main body 31 is not attached to the vehicle by a fastening member such as a bolt (not shown) inserted through the elongated hole 53 shown in FIGS. Fixed to the rotating part.

As described above, in the bracket 21 of the attachment member 12 attached to the non-rotating part of the vehicle, the substrate part 41 of the main part 31 is disposed on the innermost side in the disk radial direction. The first extending plate portion 42 and the second extending plate portion 43 extend outward from the substrate portion 41 along the disk radial direction. The extension plate 45 further extends outward in the disk radial direction on the extension of the second extension plate 43. Thereby, the long hole 53 and the crossing part 32 also extend along the disk radial direction.

In addition, the bracket 21 of the mounting member 12 in the mounted state has the second extending plate portion 43 disposed on the disk delivery side with respect to the first extending plate portion 42, and the extending plate portion than the second extending plate portion 43. 45 is disposed on the disk delivery side, and the intersection 32 is disposed on the disk delivery side with respect to the torque receiving shaft portion 73 of the dual-purpose pin 23 as shown in FIG.

As shown in FIGS. 1 and 3, the bracket 21 of the mounting member 12 in the mounted state extends from the main body portion 31 so that the intersecting portion 32 protrudes to the outer side, that is, the side opposite to the disk 11 in the disk axial direction. As shown in FIGS. 2 and 5, the portion 33 extends from the opposite side of the main portion 31 of the intersecting portion 32 to the outer side in the disc radial direction and toward the disc entry side. Therefore, as shown in FIGS. 1 and 3, the intersecting portion 32 and the extending portion 33 form a step shape on the outer side in the disc axial direction with respect to the main portion 31. In other words, the extending portion 33 is disposed on the outer side in the disc axial direction with respect to the main portion 31, and the space 60 on the main portion 31 side in the plate thickness direction of the extending portion 33 is the inner side of the extending portion 33, that is, the inner side. Provided on the disk 11 side.

As shown in FIG. 5, in the mounting member 12 in the mounted state, the screw hole 58 of the extension portion 33 is positioned on the outer side in the disk radial direction and on the disk delivery side than the screw hole 52 of the main body portion 31. As a result, the dual-purpose pin 23 screwed into the screw hole 58 is located on the outer side in the disk radial direction and on the disk delivery side than the slide pin 22 screwed into the screw hole 52. Further, as shown in FIG. 6, the mounting member 12 in the mounted state extends from the bracket 21 to the side opposite to the disk 11 (outer side) with the slide shaft portion 66 of the slide pin 22 extending in the disk axial direction. To do. The slide pin 22 guides the movement of the caliper 13 along the disk axis direction.

As shown in FIG. 1, the mounting member 12 in the mounted state has the slide pins 72 extending from the bracket 21 to the opposite side (outer side) from the bracket 21 with the dual-purpose pins 23 extending in the disk axial direction. The torque receiving shaft portion 73 extends from the bracket 21 toward the disk 11 (inner side) through a space 60 that extends to the disk 11 side of the extending portion 33. In the mounting member 12 in the mounting state, the dual-purpose pins 23 are disposed outside the disk 11 in the disk radial direction, and the torque receiving shaft portion 73 extends across the disk 11 in the disk axis direction. In the dual-purpose pin 23, the slide shaft portion 72 guides the movement of the caliper 13 along the disk axis direction, and the torque receiving shaft portion 73 receives the braking torque of the

friction pads

15 and 16. That is, the dual-purpose pin 23 serves as both a slide pin and a torque receiving pin.

The caliper 13 is supported by the mounting member 12 so as to be movable in the disk axis direction by the slide pin 22 shown in FIG. 6 and the slide shaft portion 72 of the dual-purpose pin 23 shown in FIG. The caliper. The caliper 13 includes 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, a piston seal 84, and a dust seal 85.

The caliper body 81 is movable in the disk axial direction by the slide pin 22 shown in FIG. 6 of the mounting member 12 and the slide shaft portion 72 of the dual-purpose pin 23 shown in FIG. It is supported. 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 on the outer side of the disk 11, and extends from the outer side in the disk radial direction of the cylinder portion 91 to the inner side so as to exceed the outer side in the radial direction of the disk 11. A bridge portion 92 that protrudes and a claw portion 93 that extends inward in the disk radial direction so as to face the cylinder portion 91 from the inner end of the bridge portion 92 are provided.

As shown in FIG. 2, the caliper body 81 is formed with a sliding guide portion 101 so as to project obliquely from the intermediate position in the disc rotation direction of the cylinder portion 91 inward in the disc radial direction and toward the disc insertion side. ing. Further, a sliding 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 delivery side.

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

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

As shown in FIG. 6, the boot 17 has a cylindrical intermediate portion fitted in the boot holding hole 105 of the sliding guide portion 101. This portion slides on the slide shaft portion 66 of the slide pin 22 integrally with the slide guide portion 101. The boot 17 is locked to the mounting shaft 65 on the bracket 21 side of the slide pin 22 on the opening side. The boot 17 covers the entire portion of the slide pin 22 that extends from the bracket 21 to the side opposite to the disk 11. The boot 17 has a bellows shape so that the space between the bracket 21 and the sliding guide portion 101 expands and contracts when the caliper 13 moves relative to the slide pin 22 of the sliding guide portion 101.

As shown in FIG. 1, the boot 18 covers a portion between the bracket 21 of the slide shaft portion 72 of the dual-purpose pin 23 and the sliding guide portion 102. The boot 18 has a bellows shape so as to expand and contract when the caliper 13 moves with respect to the slide shaft portion 72 of the dual-purpose pin 23 of the slide guide portion 102. One end of the boot 18 is locked to the sliding guide portion 102 of the caliper 13, and the other end is locked to the mounting shaft 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 disk axial direction so as to open toward the claw portion 93 side. In the bore 111, the cylindrical inner peripheral guide surface 112 guides the axial movement of the piston 82. The bore 111 has an annular seal groove 113 that is recessed radially outward from the inner peripheral guide surface 112, and is located on the opening side of the bore 111 relative to the seal groove 113 and radially outward from the inner peripheral guide surface 112. And an annular seal groove 114 that is recessed. 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 fitted with the piston 82 on the inner side, and seal the gap between the piston 82 and the bore 111.

As shown in FIGS. 1 and 2, a protruding portion 121 that protrudes toward the disk insertion side is formed on the disk radial direction outside of the cylinder portion 91 and on the disk insertion side, as shown in FIGS. 1 and 5. A protrusion 122 that protrudes toward the disk insertion side is also formed on the disk insertion side of the claw portion 93.

As shown in FIG. 1, the protrusion 121 is formed with a screw hole 125 penetrating in the disk axial direction. A through hole 126 that penetrates in the disk axial direction is formed in the protruding portion 122. The pad pin 83 is inserted into the through hole 126 of the protrusion 122 and screwed into the screw hole 125 of the protrusion 121 and attached to the caliper body 81. The pad pin 83 is connected to the caliper body 81 as described above, and extends in the disk axial direction by connecting the protrusion 121 and the protrusion 122. The pad pin 83 is disposed so as to straddle the disk 11 on the outer side in the disk radial direction than the disk 11 and on the disk insertion side with respect to the bridge portion 92 and the claw portion 93.

4 and 6, the friction pad 15 is an outer friction pad disposed between one surface of the disk 11 and the piston 82 and the cylinder portion 91. The friction pad 16 is an inner friction pad disposed between the other surface of the disk 11 and the claw portion 93. The

friction pads

15 and 16 are composed of a back plate 131 having the same shape and a friction material 132 having the same shape attached to the back plate 131, and the attaching surface of the friction material 132 to the back plate 131 is opposite to the front and back. It has become. That is, the

friction pads

15 and 16 have a mirror-symmetric shape.

Here, the outer friction pad 15 will be described with reference to FIGS. As shown in FIGS. 12 to 16, the back plate 131 is formed of a single plate material having a constant thickness as a whole. As shown in FIG. 13, the friction pad 15 extends outward along the length direction from the main plate portion 135 to which the friction material 132 is affixed and the width direction one side of the main plate portion 135 in the length direction. And an arm plate portion 137 (support portion) extending outwardly along the length direction from one side in the width direction on the other side in the length direction of the main plate portion 135. The arm plate portion 136 is formed with a pin hole 141 penetrating in the thickness direction of the back plate 131. The arm plate portion 137 has a shape that is recessed from the side opposite to the main plate portion 135 toward the main plate portion 135 side. A recess 142 is formed so as to penetrate in the thickness direction of the back plate 131. By forming the recess 142, the end of the arm plate 137 opposite to the main plate 135 is a base 143 on the main plate 135 side and a pair of protrusions protruding from the base 143 in the opposite direction to the main plate 135.

Parts

144 and 145. The pin hole 141 of the arm plate portion 136 is a square hole that is slightly longer in the length direction of the main plate portion 135.

As shown in FIG. 6, the outer friction pad 15, which is one of the pair of

friction pads

15, 16, has the friction material 132 disposed on the disk 11 side and the back plate 131 disposed on the cylinder portion 91 and the piston 82 side. As shown in FIG. 1, the arm plate portion 136 of the back plate 131 is arranged on the disk feed-in side and the arm plate portion 137 is arranged on the disk feed-out side. In this state, the friction pad 15 allows the pad pin 83 of the caliper 13 to be inserted into the pin hole 141 of the arm plate portion 136 and partially inserts the torque receiving shaft portion 73 of the dual-purpose pin 23 into the recess 142 of the arm plate portion 137. . As a result, the friction pad 15 is in a state in which the movement in the disk circumferential direction and the disk radial direction is substantially restricted by the arm plate portion 136 on the pad pin 83 and the arm plate portion 137 on the torque receiving shaft portion 73 of the dual-purpose pin 23, respectively. It is slidably supported in the disk axial direction.

As shown in FIG. 6, the inner friction pad 16 is in a state in which the friction material 132 is disposed on the disk 11 side and the back plate 131 is disposed on the claw portion 93 side, and as shown in FIG. The part 136 is placed on the disk feed-in side and the arm plate part 137 is placed on the disk feed-out side. In this state, the friction pad 16 allows the pad pin 83 of the caliper 13 to be inserted into the pin hole 141 of the arm plate portion 136 and partially inserts the torque receiving shaft portion 73 of the dual-purpose pin 23 into the recess 142 of the arm plate portion 137. Thereby, the friction pad 16 is in a state in which the movement in the disk circumferential direction and the disk radial direction is substantially restricted by the arm plate portion 136 at the pad pin 83 and the arm plate portion 137 at the torque receiving shaft portion 73 of the dual-purpose pin 23, respectively. And is supported so as to be slidable in the disk axial direction. The dual-purpose pin 23, which is a rod-shaped member including the torque receiving shaft portion 73, is disposed on one end side (disc delivery side) of the pair of

friction pads

15, 16 provided in the attachment member 12 and in the disc axial direction. It extends.

As shown in FIG. 5, the outer friction pad 15 does not wrap with the main portion 31 and the intersection 32 of the bracket and wraps with only the extension portion 33 in the disc radial direction perpendicular to the central axis of the disc 11. It is supposed to be. In other words, when viewed from the disk axial direction, the outer friction pad 15 does not wrap with the main body portion 31 and the intersecting portion 32 of the bracket 21 but only with the extending portion 33. At this time, the arm plate portion 137 wraps the extension portion 33 in the outer friction pad 15.

The outer friction pad 15 disposed between the disk 11 and the bracket 21 has an arm plate portion 137 having an intersecting portion 32 and an extending portion 33 with respect to the main body portion 31 in the disk axial direction. By forming a step shape on the side, the main portion 31 and the intersecting portion 32 generated on the inner side of the extending portion 33 are arranged in a space 60 where the positions in the disk axial direction match. Thereby, as shown in FIG. 1, the arm plate portion 137 can wrap the main portion 31 and the position in the disk axial direction, and at least the friction material 132 is in a new state and the main portion 31 and the position in the disk axial direction. Wraps. That is, the arm plate portion 137 that is a portion supported by the dual-purpose pin 23 of the friction pad 15 is disposed at a position where it wraps in the disk axial direction with the main body portion 31. In other words, the arm plate portion 137 overlaps the main body portion 31 at the position in the disc axial direction.

Here, the

friction pads

15 and 16 are moved from the mounting member 12 and the caliper 13 while the caliper 13 is supported at two places supported by both the slide pin 22 of the mounting member 12 and the slide shaft portion 72 of the both-purpose pin 23. Can be removed.

As shown in FIG. 1, since the bracket 21 of the mounting member 12 is entirely disposed on the outer side of the disk 11, the inner friction pad 16 interferes with the mounting member 12 when moving inward in the disk radial direction. There is nothing to do. For this reason, referring to FIG. 5, after removing the pad pin 83 from the caliper 13, the arm plate portion 137 is moved inward in the radial direction of the disk while the arm plate portion 137 is moved to the torque receiving shaft of the dual-purpose pin 23 of the mounting member 12. The part 73 is moved away from the disk entry side. As a result, the inner friction pad 15 can be removed from the caliper 13 and the mounting member 12 that are supported in two places.

As shown in FIG. 1, the back plate 131 including the arm plate portion 137 of the friction pad 15 on the outer side has a main portion 31 and a crossing portion 32 of the mounting member 12 located on the inner side in the disc radial direction and a position in the disc axial direction. Therefore, the main portion 31 and the intersecting portion 32 limit the moving range inward in the disk radial direction. Referring to FIG. 5, when removing the outer friction pad 15, after removing the pad pin 83 from the caliper 13, the arm plate portion 137 is attached to the mounting member 12 while moving the arm plate portion 136 side inward in the disk radial direction. The two-pin 23 is separated from the torque receiving shaft portion 73 toward the disk insertion side. At this time, the back plate 131 of the outer friction pad 15 wraps the main portion 31 and the crossing portion 32 located on the inner side in the disc radial direction with the position in the disc axial direction, so that the main portion 31 moves the inner side in the disc radial direction. The movement range is limited. For this reason, the dual-purpose pin 23 and the caliper 13 are arranged so that the arm plate portion 137 can be separated from the dual-purpose pin 23 toward the disk insertion side within a range in which the outer friction pad 15 does not interfere with the main portion 31 and the intersecting portion 32. The distance from the bridge portion 92 is set. As a result, the outer friction pad 15 can be removed from the caliper 13 and the mounting member 12 that are supported at two locations. Therefore, the

friction pads

15 and 16 can be attached to and detached from the caliper 13 while the caliper 13 is supported at two places where the caliper 13 is supported by both the slide pin 22 and the both-purpose pins 23 of the mounting member 12.

When the brake fluid is introduced into the bore 111 of the cylinder portion 91 shown in FIG. 6, the caliper 13 moves forward in the direction of the disc 11 along the disc axial direction with respect to the cylinder portion 91, and the outer friction pad 15. Is pressed toward the disk 11. Then, the friction pad 15 slides on the torque receiving shaft portion 73 and the pad pin 83 of the dual-purpose pin 23 and comes into contact with one surface of the disk 11 at the friction material 132. The caliper 13 is fitted in the pin sliding contact hole 107 in the sliding guide portion 102 while sliding on the slide shaft portion 66 of the slide pin 22 together with the boot 17 in the sliding guide portion 101 by the reaction force generated thereby. By sliding on the slide shaft portion 72 of the combined both-purpose pin 23, the cylinder portion 91 is moved in a direction away from the disk 11. Then, the claw portion 93 presses the inner friction pad 16 toward the disk 11. Then, the friction pad 16 slides on the torque receiving shaft portion 73 and the pad pin 83 of the dual-purpose pin 23 and comes into contact with the other surface of the disk 11 at the friction material 132. In this manner, the caliper 13 brakes the rotation of the disk 11, that is, the wheel by pressing the disk 11 with the

friction pads

15 and 16 sandwiched from both sides by the claw portion 93 and the piston 82.

As described above, the pair of

friction pads

15 and 16 are disposed on both sides of the disk 11, and slide on the torque receiving shaft 73 on the disk delivery side of the mounting member 12 and the pad pin 83 on the disk delivery side of the caliper 13. The caliper 13 is supported so as to be pressed against both surfaces of the disk 11.

Here, at the time of braking while the vehicle is moving forward, the pair of

friction pads

15 and 16 are pressed by the disk 11 toward the disk delivery side. At this time, the pair of

friction pads

15 and 16 are basically configured such that the arm plate portion 136 in which the pin hole 141 has a long hole shape is not pressed against the pad pin 83 to the disk delivery side, and the arm plate portion. The base portion 143 at the bottom of the concave portion 142 of the 137 contacts the torque receiving shaft portion 73 of the dual-purpose pin 23 and presses the torque receiving shaft portion 73 of the dual-purpose pin 23. At that time, the pair of

friction pads

15 and 16 to the torque receiving shaft portion 73 of the dual-purpose pin 23 pass through the center of the torque receiving shaft portion 73 when viewed from the disk axial direction as shown in FIG. A braking load F directed to the disk delivery side is generated on a line perpendicular to the line connecting the rotation center and the center of the friction material 132. When viewed from the disk axial direction, the intersecting portion 32 provided between the main portion 31 and the extending portion 33 is not parallel to the direction of the braking load F but is always inclined at a predetermined angle α. The angle α is always 45 ° or less.

In the disc brake described in Patent Document 1 described above, the caliper bracket formed by pressing one plate member is separated from the support portion for supporting the outer friction pad and the disc rotor of the outer friction pad. A restricting part for restricting the movement of the direction is provided. In this structure, the friction pad on the outer side comes into surface contact with the support portion of the caliper bracket, the sliding resistance in the disk axial direction is increased, and the drag torque is increased. Further, in order to cope with the wear of the friction pad on the outer side, it is necessary to project the support portion from the caliper bracket in the disk axial direction, which makes the shape complicated and increases the cost. In addition, since the back plate of the friction pad cannot be shared between the inner side and the outer side, the number of parts increases.

On the other hand, the disc brake 10 according to the embodiment of the present invention supports the outer friction pad 15 in addition to the inner friction pad 16 by the dual-purpose pins 23 of the mounting member 12. As a result, the outer friction pad 15 comes into line contact with the dual-purpose pin 23 of the mounting member 12, and the sliding resistance in the disk axial direction can be suppressed, and the drag torque can be suppressed.

Further, since the outer friction pad 15 is supported by the dual-purpose pins 23, it is not necessary to project the bracket 21 in the disk axial direction in order to cope with the wear of the outer friction pad 15, and the shape of the bracket 21 is complicated. Can be suppressed. Therefore, an increase in cost can be suppressed.

Further, since both the outer side and inner

side friction pads

15 and 16 are supported by the dual-purpose pins 23 of the mounting member 12, a common part that can be used by inverting the back plate 131 of the

friction pads

15 and 16 upside down. Can be. Therefore, cost reduction can be achieved by reducing the number of parts. In addition, the back plate 131 of the

friction pads

15 and 16 can be a common component when the disc brake 10 is arranged on the left side and the right side of the vehicle.

Further, the mounting member 12 is extended to the outer side in the disk radial direction from the main part 31 fixed to the vehicle, the crossing part 32 protruding from the main part 31 to the opposite side of the disk 11 in the disk axial direction. The bracket 21 having the extending portion 33 and the dual-purpose pin 23 are configured, and the dual-purpose pin 23 is provided in the extended portion 33. That is, the both-purpose pins 23 are attached to the extending portions 33 that are displaced in the disk axial direction with respect to the main body portion 31 with the intersecting portions 32 interposed therebetween, and the arms supported by the both-purpose pins 23 of the outer friction pad 15. The plate portion 137 is disposed at a position where it wraps with the main body portion 31 in the disk axial direction. Thereby, miniaturization becomes possible.

Moreover, the crossing part 32 provided between the main body part 31 and the extension part 33 becomes a rib which reinforces the bracket 21, and the rigidity of the bracket 21 and the mounting member 12 including the same can be improved. Thereby, brake squeal caused by a disk, a wheel, or the like can be reduced.

Further, the crossing portion 32 is not parallel to the direction of the braking load F received by the torque receiving shaft portion 73 of the dual-purpose pin 23 from the pair of

friction pads

15 and 16 during forward braking of the vehicle, but always inclined at a predetermined angle α. Therefore, the rigidity of the bracket 21 can be improved. Moreover, since the predetermined angle α is formed to be 45 ° or less, the effect of improving the rigidity of the bracket 21 is high.

In the above embodiment, a mounting member fixed to a non-rotating portion of a vehicle, a caliper supported by the mounting member and disposed across the outer peripheral side of the disc, and pressed by the caliper on both sides of the disc A pair of friction pads, and a rod-like member provided on the mounting member, disposed on one end side in the disk circumferential direction of the pair of friction pads, and extending in the disk axial direction, of the pair of friction pads One includes a support portion slidably supported by the rod-shaped member, and the mounting member includes a first portion fixed to the vehicle, and the disc from the first portion in the disc axial direction. And a third portion extending outward in the radial direction of the disk from the second portion, and the rod-shaped member is provided at the third portion and supports the support member. Part is It is arranged at a position to wrap to the first portion and the disk axial direction.
With this configuration, the size can be reduced.

Moreover, in the said embodiment, the said 2nd site | part inclines at a predetermined angle with respect to the braking load direction which the said rod-shaped member receives.
With this configuration, the rigidity of the attachment member can be improved.

DESCRIPTION OF SYMBOLS 10 Disc brake 11 Disc 12 Mounting member 13

Caliper

15, 16 Friction pad 23 Both-use pin (bar-shaped member)
31 Main part (first part)
32 Intersection (second part)
33 Extension part (third part)
137 Arm plate part (support part)

Claims

An attachment member fixed to a non-rotating part of the vehicle;
A caliper supported by the mounting member and disposed across the outer periphery of the disk;
A pair of friction pads pressed against both sides of the disk by the caliper;
A rod-like member provided on the attachment member, disposed on one end side in the disk circumferential direction of the pair of friction pads, and extending in the disk axial direction;
One of the pair of friction pads includes a support portion that is slidably supported by the rod-shaped member,
The mounting member includes a first part fixed to the vehicle, a second part projecting from the first part to the side opposite to the disk in the disk axial direction, and the second part. A third portion extending outward in the radial direction of the disk,
The rod-shaped member is provided in the third part,
The said support part is a disc brake arrange | positioned in the position which wraps in the said disk axial direction with the said 1st site | part.
The disc brake according to claim 1, wherein the second portion is inclined at a predetermined angle with respect to a braking load direction received by the rod-shaped member.