WO2022124328A1 - Disc brake - Google Patents

Abstract

This disc brake comprises a friction pad, a body member, and a pad spring. The friction pad is provided with: extended portions each extending in a direction inclined toward the radially outer side of a disk with respect to the longitudinal direction from end portions of the friction pad in the longitudinal direction; and a base surface portion extending in a direction perpendicular to the longitudinal direction from the extended portions toward the radially inner side of the disk. The body member is provided with: a pad engaging portion which has first flat surface portions conforming to the extending direction of the extended portions and with which the extended portions are to be engaged; and a torque receiving portion which is provided so as to extend from the pad engaging portion toward the radially inner side of the disk, which has second flat surface portions conforming to the extending direction of the base surface portion, and with which the base surface portion is to be brought into abutment. The pad spring is mounted with an inclination with respect to a plane perpendicular to the second flat surface portions when viewed from the axial direction of the disk.

Description

Disc brake

The present invention relates to a disc brake for braking a vehicle such as a two-wheeled vehicle or a four-wheeled vehicle.
This application claims priority based on Japanese Patent Application No. 2020-205022 filed in Japan on December 10, 2020, the contents of which are incorporated herein by reference.

The disc brake includes a locking member that locks the friction pad so as to be movable in the disc axial direction, and a pressing member that presses the friction pad against the disc. The friction pad has a lining material that comes into contact with the disc and a back plate to which the lining material is attached. In the disc brake, an extension portion extending in a direction inclined with respect to the longitudinal direction of the friction pad is provided on the end side of the back plate in the disc rotation direction, and the locking member is provided with an extension portion in the extension direction of the extension portion. There is a structure in which a pad locking portion having a flat portion extending along the surface is provided and the extending portion of the friction pad is locked to the pad locking portion (see, for example, Patent Document 1).

International Publication No. 2019/24960

It is required to suppress the decrease in productivity of disc brakes.

Therefore, an object of the present invention is to provide a disc brake capable of suppressing a decrease in productivity.

In order to achieve the above object, the present invention has adopted the following aspects.
The disc brake according to one aspect of the present invention includes a friction pad, a body member that movably locks the friction pad in the axial direction of the disc, and a pad spring that presses the friction pad inward in the radial direction of the disc. The friction pad comprises an extension portion extending in a direction inclined toward the radial outer side of the disk with respect to the longitudinal direction from the longitudinal end portion of the friction pad, and an extension portion extending in the longitudinal direction. The body member includes a base surface portion that extends radially inward from the extension portion while being orthogonal to the extension portion, and the body member has a first flat surface portion along the extension direction of the extension portion. It has a pad locking portion to which the extending portion is locked, and a second flat surface portion extending from the pad locking portion inward in the radial direction of the disk and along the extending direction of the base surface portion. The pad spring is provided with a torque receiving portion with which the base surface portion abuts, and the pad spring is attached so as to be inclined with respect to a plane orthogonal to the second plane portion when viewed from the axial direction of the disc.

The disc brake according to another aspect of the present invention is a friction pad, which extends in a direction inclined from the longitudinal end of the friction pad toward the radial outer side of the disc with respect to the longitudinal direction. A friction pad having a protruding portion and a base surface portion extending radially inward from the extending portion while being orthogonal to the longitudinal direction, and the friction pad can be moved in the axial direction of the disk. A pad locking portion that is a body member to be stopped and has a first flat surface portion along the extending direction of the extending portion, and the extending portion is locked, and the disc from the pad locking portion. A body member having a second plane portion extending inward in the radial direction of the base surface portion, having a second flat surface portion along the extending direction of the base surface portion, and having a torque receiving portion with which the base surface portion abuts, and a shaft of the disk. It is attached at an angle with respect to a plane orthogonal to the second plane portion when viewed from a direction, and includes a pad spring that presses the friction pad inside in the radial direction of the disc.

According to each of the above aspects of the present invention, it is possible to provide a disc brake capable of suppressing a decrease in productivity.

It is a figure which looked at the disc brake which concerns on one Embodiment of this invention from the outside in the disk radial direction. It is the II arrow view of FIG. 1 which shows the disc brake of the same embodiment. FIG. 3 is a view taken along the line III of FIG. 1 showing a disc brake of the same embodiment. It is a figure which looked at the disc brake of the same embodiment from the inside in the disc radial direction. It is a VV sectional view of FIG. 1 which shows the disc brake of the same embodiment. It is sectional drawing which shows the pad spring of the disc brake of the same embodiment. It is sectional drawing which shows the pad spring of the disc brake of the same embodiment. It is a figure explaining the relationship of the force applied to the friction pad from the pad spring of the disc brake of the same embodiment. It is a figure explaining the relationship of the force applied to the friction pad from the pad spring of the disc brake of the same embodiment. It is a figure explaining the relationship of the force applied to the friction pad from the pad spring of the disc brake of the same embodiment.

An embodiment of the present invention will be described with reference to the drawings. The disc brake 10 of the present embodiment is an opposed piston type disc brake for front wheel braking of a motorcycle. The present invention is not limited to this, and of course, it can be applied to disc brakes for rear wheel braking of motorcycles and braking of four-wheeled vehicles.

As shown in FIGS. 1 to 5, the disc brake 10 includes a disc-shaped disc 11 that rotates together with a wheel to be braked, and a caliper 12 that is attached to the vehicle body side and imparts frictional resistance to the disc 11. I have. In the following, the radial direction of the disk 11 is referred to as the disk radial direction, the central axis of the disk 11 is referred to as the disk axis, the extending direction of the disk axis is referred to as the disk axis direction, and the rotation direction (circumference) of the disk 11 is referred to. Direction) is called the disk rotation direction. Further, the center side of the disc 11 in the disc radial direction is referred to as the inside in the disc radial direction, and the side opposite to the center of the disc 11 in the disc radial direction is referred to as the outside in the disc radial direction. Further, the exit side in the rotation direction R of the disc 11 when the vehicle to which the disc brake 10 is attached is referred to as the disc rotation side, and the inlet side in the rotation direction R of the disc 11 during the forward travel is also referred to as the disc rotation side. Called the entrance side.

The caliper 12 is a caliper body 15 (body member) arranged so as to straddle the outer peripheral side of the disc 11 and fixed to the vehicle body side as shown in FIGS. 1 to 3, and a caliper body as shown in FIGS. 2 to 4. It has four pistons 16 of the same shape housed in 15. In the present embodiment, a line along the disc radial direction through the disc axis of the disc 11 and the center of the caliper body 15 in the disc rotation direction is referred to as a disc radial reference line, and the extending direction of the disc radial reference line. Is called the reference line direction. The disc radial reference line is orthogonal to the disc axis.

The caliper 12 is provided with two pistons 16 paired on both sides in the disc axial direction with respect to the disc 11 so as to align the positions in the disc radial direction and the disc rotation direction. Two pairs of such configurations are provided at predetermined intervals in the disk rotation direction. In other words, in the caliper 12, one piston 16 and one piston 16 are aligned with each other in the disc radial direction and the disc axial direction on one side in the disc axial direction with respect to the disc 11, and a predetermined interval is provided in the disc rotation direction. They are set up side by side. Such a configuration is provided on both sides of the disk 11 in the disk axial direction. Therefore, the caliper 12 is an opposed piston type 4-pot caliper. The pistons may be paired with at least a pair sandwiching the disk 11, and may be paired with three or four in addition to the above two pairs. Further, the number of pistons may be different on both sides in the disc axial direction with respect to the disc 11, such as one and two, two and three.

As shown in FIG. 1, the caliper body 15 has a cylinder portion 21 arranged on the outer side of the disc 11 (the side opposite to the wheel with respect to the disc 11) in the disc axial direction, and the inner side (disc 11) of the disc 11. The cylinder portion 22 arranged on the wheel side), the end side connecting portion 23 connecting the cylinder portion 21 and one end portions of the cylinder portion 22 in the disc rotation direction, and the disc rotation of the cylinder portion 21 and the cylinder portion 22. It has an end-side connecting portion 24 that connects the other ends in the direction, and an intermediate connecting portion 25 that connects the intermediate portions of the cylinder portion 21 and the cylinder portion 22 in the disc rotation direction. The end-side connecting portion 23, the end-side connecting portion 24, and the intermediate connecting portion 25 are all arranged so as to straddle the disk 11 in the disk axial direction on the outer side in the disk radial direction. In other words, the caliper body 15 is paired with a pair of end- side connecting portions 23, 24 that connect the pair of cylinder portions 21 and 22 across the disk 11 at the ends of the pair of cylinder portions 21 and 22 in the disk rotation direction. In the intermediate portion of the cylinder portions 21 and 22 in the disk rotation direction, the intermediate connecting portion 25 for connecting the pair of cylinder portions 21 and 22 across the disk 11 is provided.

The caliper body 15 is a monoblock caliper in which the cylinder portion 21, the cylinder portion 22, the end side connecting portion 23, the end side connecting portion 24, and the intermediate connecting portion 25 are formed of an integral casting. Therefore, the cylinder portion 21 and the cylinder portion 22 are seamlessly and integrally formed via the end side connecting portion 23, the end side connecting portion 24, and the intermediate connecting portion 25.

As shown in FIG. 4, the cylinder portion 21 on the outer side is arranged so as to face the surface on the outer side of the disc 11. The cylinder portion 21 on the outer side has a mounting boss portion 34 arranged on the end side connecting portion 23 side, which is one end in the disk rotation direction, and a mounting portion arranged on the end side connecting portion 24 side, which is the other end in the disk rotation direction. It has a boss portion 35 and.

Since the cylinder portion 21 accommodates a plurality of pistons 16 side by side in the disc rotation direction, it has a long shape along the disc rotation direction. As shown in FIG. 2, two cylinder bores 38 and 39 for accommodating the piston 16 so as to be movable in the disk axial direction are formed in the cylinder portion 21 side by side in the disk rotation direction. In the cylinder bores 38 and 39, one of the cylinder bores 38 is on the end side connecting portion 23 side of the center of the cylinder portion 21 in the disk rotation direction, and the other cylinder bore 39 is on the end side of the center of the cylinder portion 21 in the disc rotation direction. They are arranged on the connecting portion 24 side, respectively. The cylinder bores 38 and 39 are open to the disk 11 side in the disk axial direction.

As shown in FIG. 1, at the center position of the cylinder portion 21 in the disc rotation direction, a supply / discharge port 41 for supplying / discharging the brake fluid is formed in the cylinder bores 38 and 39. The supply / discharge port 41 is formed parallel to the disc radial reference line.

A mount hole 44 is formed in the mounting boss portion 34, and a mounting hole 45 is formed in the mounting boss portion 35 so as to penetrate in the disc radial direction. These mount holes 44 and 45 are parallel to the disc radial reference line, and are formed so as to be equidistant from the center of the caliper body 15 in the disc rotation direction and aligned with each other in the disc axial direction. The caliper 12 is a so-called radial mount type that is fixed to the vehicle body side of the vehicle with mounting bolts (not shown) inserted through these mount holes 44 and 45.

The caliper 12 has a bleeder plug 48 for bleeding air, and a bleeder boss portion 49 to which the bleeder plug 48 is attached is formed on the end side connecting portion 23 of the caliper body 15. The caliper body 15 is arranged on the rear side of the disc 11 in the vehicle front-rear direction with the end-side connecting portion 23 on which the bleeder boss portion 49 is formed arranged on the upper side in the vertical direction. Therefore, when the vehicle is traveling forward, the disc 11 moves from the bottom to the top in the vertical direction with respect to the caliper body 15. In the caliper body 15, one end side connecting portion 23 in which the bleeder boss portion 49 is arranged is arranged on the disk turning side, and the other end side connecting portion 24 is arranged on the disk turning side.

As shown in FIG. 4, the cylinder portion 22 on the inner side is arranged so as to face the inner side surface of the disk 11. As shown in FIG. 3, the cylinder portion 22 on the inner side has a long shape along the disc rotation direction in order to accommodate the two pistons 16 side by side in the disc rotation direction. The cylinder portion 22 is formed with two cylinder bores 58 and 59 that accommodate the piston 16 so as to be movable in the disc axial direction, side by side in the disc rotation direction. In the cylinder bores 58 and 59, one of the cylinder bores 58 is on the end side connecting portion 23 side of the center of the cylinder portion 22 in the disk rotation direction, and the other cylinder bore 59 is on the end side of the center of the cylinder portion 22 in the disc rotation direction. They are arranged on the connecting portion 24 side, respectively. The cylinder bores 58 and 59 are open on the disc 11 side in the disc axial direction. The supply / discharge port 41 of the cylinder portion 21 on the outer side shown in FIG. 1 brakes not only the cylinder bores 38 and 39 of the cylinder portion 21 shown in FIG. 2 but also the cylinder bores 58 and 59 of the cylinder portion 22 shown in FIG. Supply and drain the liquid. The cylinder bores 38, 39, 58, 59 have the same diameter.

In the caliper body 15, the cylinder portion 21 shown in FIGS. 1 and 2 and the cylinder portion 22 shown in FIGS. 1 and 3 overlap each other in the disc rotation direction and the disc radial direction and face each other in the disc axial direction. Is arranged. The cylinder bore 58 is formed coaxially with the cylinder bore 38, and the cylinder bore 59 is formed coaxially with the cylinder bore 39.

As shown in FIG. 1, the end-side connecting portion 23 on the disk rotation side has a pad support portion 32A and a pad support portion 33B on the end-side connecting portion 24 side in the disk rotation direction. The pad support portion 32A is arranged on the outer side with respect to the disc 11, and the pad support portion 33B is arranged on the inner side with respect to the disc 11. The end-side connecting portion 24 on the disk entry side has a pad support portion 32B and a pad support portion 33A on the end-side connecting portion 23 side in the disk rotation direction. The pad support portion 33A is arranged on the outer side with respect to the disc 11, and the pad support portion 32B is arranged on the inner side with respect to the disc 11. Therefore, the end-side connecting portion 23 has pad support portions 32A and 33B on both sides of the disc 11 in the disc axial direction. The end-side connecting portion 24 has pad support portions 32B and 33A on both sides of the disc 11 in the disc axial direction. In other words, the end side connecting portions 23 and 24 are provided with pad support portions 32A, 33B, 32B and 33A. In the caliper body 15, the pad support portions 32A and 33B are arranged on the disc feeding side, and the pad support portions 32B and 33A are arranged on the disc turning side.

The pad support portion 32A and the pad support portion 33B on the disk rotation side shown in FIGS. 1 and 4 are opposed to each other in the disk axial direction by superimposing the positions in the disk rotation direction and the disk radial direction. Further, the pad support portion 33A and the pad support portion 32B on the disc entry side are opposed to each other in the disc axial direction by superimposing the positions in the disc rotation direction and the disc radial direction. As shown in FIG. 4, the disc 11 is arranged between the pad support portion 32A and the pad support portion 33A on the outer side and the pad support portion 32B and the pad support portion 33B on the inner side.

The pad support portion 32A and the pad support portion 33A on the outer side are mirror-symmetrical in the disk rotation direction. The pad support portion 32B and the pad support portion 33B on the inner side are mirror-symmetrical in the disk rotation direction. The pad support portion 32A and the pad support portion 33B on the disk rotation side are mirror-symmetrical in the disk axial direction. The pad support portion 32B and the pad support portion 33A on the disk entry side are mirror-symmetrical in the disk axial direction. The pair of end- side connecting portions 23 and 24 connect the pair of cylinder portions 21 and 22 across the disk 11 at the ends of the pair of cylinder portions 21 and 22 in the disk rotation direction.

The caliper body 15 is surrounded by cylinder portions 21 and 22, and pad support portions 32A, 32B, 33A, and 33B, and a pad arrangement space 61 that opens on both sides in the radial direction of the disk is formed substantially in the center. The inside of the pad arrangement space 61 in the radial direction of the disk is entirely open. As shown in FIG. 1, the intermediate connecting portion 25 is provided at the center position of the caliper body 15 in the disk rotation direction, and the pad arrangement space 61 is provided straddling the disk axial direction on the outer side in the disk radial direction. .. Therefore, the outside of the pad arrangement space 61 in the disc radial direction is a portion between the pad support portions 32A, 33B and the intermediate connecting portion 25 on the disc feeding side, and the pad supporting portions 32B, 33A and the intermediate connecting portion on the disc feeding side. The portion between 25 is open. The cylinder bores 38, 39 shown in FIG. 2 and the cylinder bores 58, 59 shown in FIG. 3 are open to the pad arrangement space 61 shown in FIG. The disc 11 crosses the center position of the pad arrangement space 61 in the disc axial direction in the disc rotation direction.

Here, in the caliper body 15, the cylinder portion 21, the cylinder portion 22, the end side connecting portion 23, the end side connecting portion 24, and the intermediate connecting portion 25 shown in FIG. 1 are the cylinder bores 58, 59 of the cylinder portion 22 shown in FIG. It is integrally molded seamlessly by casting except for the bottom of the cylinder. Then, the inner surface of the cylinder bores 38, 39, 58, 59 is machined through the cast openings at the bottoms of the cylinder bores 58, 59 at these two locations of the cylinder portion 22. After that, the caliper body 15 is formed by joining a separate closing member to the opening at the bottom of the cylinder bores 58 and 59 of the cylinder portion 22 by friction stir welding to close the opening and form the bottom. .. The entire cylinder portion 21, cylinder portion 22, end-side connecting portion 23, end-side connecting portion 24, and intermediate connecting portion 25 are integrally molded by casting, and the cylinder bore is formed from the pad arrangement space 61 between the cylinder portions 21 and 22. The inner surfaces of 38, 39, 58, 59 may be machined.

As shown in FIG. 5, the pad support portion 33B on the inner side of the end side connecting portion 23 on the disc rotation side has a torque receiving surface 81B (second flat surface portion) facing the pad arrangement space 61 side and a disc 11 side. A rotor facing surface 82B facing toward the surface and a flat surface portion 83B (first flat surface portion) facing the outside in the disc radial direction and toward the pad arrangement space 61 are formed. The torque receiving surface 81B is a flat surface extending parallel to the disc radial reference line, and extends parallel to the disc axis. The rotor facing surface 82B extends perpendicular to the disk axis. The flat surface portion 83B is a flat surface extending parallel to the disk axis, and is inclined so as to be farther from the disk radial reference line toward the outside in the disk radial direction in the reference line direction. The flat surface portion 83B and the torque receiving surface 81B form an obtuse angle.

The pad support portion 33B has a pad locking portion 85B including a flat surface portion 83B at the outer end portion in the disc radial direction, and a torque receiving surface 81B at the inner portion in the disc radial direction than the pad locking portion 85B. It is a torque receiving portion 86B including. The torque receiving portion 86B is provided so as to extend inward in the disc radial direction from the pad locking portion 85B. The torque receiving portion 86B is continuously provided from the pad locking portion 85B. The torque receiving surface 81B is continuously provided from the flat surface portion 83B of the pad locking portion 85B.

The pad support portion 32B on the inner side of the end side connecting portion 24 on the disk entry side has a torque receiving surface 71B (second flat surface portion) facing the pad arrangement space 61 side and a rotor facing surface 72B facing the disk 11 side. , A flat surface portion 73B (first flat surface portion) facing the outside in the radial direction of the disk and toward the pad arrangement space 61 side is formed. The torque receiving surface 71B is a flat surface extending parallel to the disc radial reference line, and extends parallel to the disc axis. The rotor facing surface 72B extends perpendicular to the disk axis and is arranged in the same plane as the rotor facing surface 82B. The flat surface portion 73B is a flat surface extending parallel to the disc axis, and is inclined so as to be farther from the disc radial reference line toward the outside in the disc radial direction in the reference line direction. The flat surface portion 73B and the torque receiving surface 71B have an obtuse angle, and this angle is the same as the angle formed by the flat surface portion 83B and the torque receiving surface 81B.

The pad support portion 32B has a pad locking portion 75B including a flat surface portion 73B at the outer end portion in the disc radial direction, and a torque receiving surface 71B at the inner portion in the disc radial direction than the pad locking portion 75B. It is a torque receiving portion 76B including. The torque receiving portion 76B is provided so as to extend inward in the disc radial direction from the pad locking portion 75B. The torque receiving portion 76B is continuously provided from the pad locking portion 75B. The torque receiving surface 71B is continuously provided from the flat surface portion 73B of the pad locking portion 75B. The pad locking portions 75B and 85B are mirror-symmetrical in the disk rotation direction. The torque receiving portions 76B and 86B are also mirror-symmetrical in the disk rotation direction.

As shown in FIG. 4, the pad support portion 32A on the outer side of the end side connecting portion 23 on the disc rotation side has a torque receiving surface 71A (second flat surface portion) facing the pad arrangement space 61 side and a disc 11 side. A rotor facing surface 72A facing toward the surface is formed, and as shown in FIG. 1, a flat surface portion 73A (first flat surface portion) facing the outside in the disk radial direction and toward the pad arrangement space 61 side is formed. The torque receiving surface 71A shown in FIG. 4 is a flat surface extending parallel to the disc radial reference line, and extends parallel to the disc axis. The rotor facing surface 72A extends perpendicular to the disk axis. The torque receiving surface 71A is arranged on the same plane as the torque receiving surface 81B. The flat surface portion 73A shown in FIG. 1 is a flat surface extending parallel to the disk axis, and is inclined so as to be farther from the disk radial reference line toward the outside in the disk radial direction in the reference line direction. The flat surface portion 73A is arranged on the same plane as the flat surface portion 83B. The flat surface portion 73A and the torque receiving surface 71A shown in FIG. 4 have an obtuse angle, and this angle is the same as the angle formed by the flat surface portion 83B and the torque receiving surface 81B shown in FIG.

As shown in FIG. 1, the pad support portion 32A has a pad locking portion 75A including a flat surface portion 73A at the outer end portion in the disc radial direction, and is inside the disc locking portion 75A in the disc radial direction. Is a torque receiving portion 76A including a torque receiving surface 71A as shown in FIG. The torque receiving portion 76A is provided so as to extend inward in the disc radial direction from the pad locking portion 75A. The torque receiving portion 76A is continuously provided from the pad locking portion 75A shown in FIG. The torque receiving surface 71A shown in FIG. 4 is continuously provided from the flat surface portion 73A of the pad locking portion 75A shown in FIG.

As shown in FIG. 4, the pad support portion 33A on the outer side of the end side connecting portion 24 on the disc entry side has a torque receiving surface 81A (second flat surface portion) facing the pad arrangement space 61 side and a disc 11 side. A rotor facing surface 82A facing toward the surface is formed, and as shown in FIG. 1, a flat surface portion 83A (first flat surface portion) facing the outside in the disk radial direction and toward the pad arrangement space 61 side is formed. The torque receiving surface 81A shown in FIG. 4 is a flat surface extending parallel to the disc radial reference line, and extends parallel to the disc axis. The torque receiving surface 81A is arranged on the same plane as the torque receiving surface 71B. The rotor facing surface 82A extends perpendicular to the disk axis and is arranged in the same plane as the rotor facing surface 72A. The flat surface portion 83A shown in FIG. 1 is a flat surface extending parallel to the disk axis, and is inclined so as to be farther from the disk radial reference line toward the outside in the disk radial direction in the reference line direction. The flat surface portion 83A is arranged on the same plane as the flat surface portion 73B. The flat surface portion 83A and the torque receiving surface 81A shown in FIG. 4 have an obtuse angle, and this angle is the same as the angle formed by the flat surface portion 83B and the torque receiving surface 81B shown in FIG.

As shown in FIG. 1, the pad support portion 33A has a pad locking portion 85A including a flat surface portion 83A at the outer end portion in the disc radial direction, and is inside the disc locking portion 85A in the disc radial direction. Is a torque receiving portion 86A including a torque receiving surface 81A as shown in FIG. The torque receiving portion 86A is provided so as to extend inward in the disc radial direction from the pad locking portion 85A. The torque receiving portion 86A is continuously provided from the pad locking portion 85A shown in FIG. The torque receiving surface 81A shown in FIG. 4 is continuously provided from the flat surface portion 83A of the pad locking portion 85A shown in FIG. The pad locking portions 75A and 85A are mirror-symmetrical in the disk rotation direction, and the torque receiving portions 76A and 86A shown in FIG. 4 are also mirror-symmetrical in the disk rotation direction.

The torque receiving surfaces 71A and 81B arranged on the same plane are parallel to the torque receiving surfaces 71B and 81A arranged on the same plane. These torque receiving surfaces 71A, 71B, 81A, 81B are parallel to a surface including the disk radial reference line and the disk axis, and are arranged at positions equidistant from this surface. A plane orthogonal to the torque receiving surfaces 71A, 71B, 81A, 81B and parallel to the disk axis is orthogonal to the disk radial reference line.

As shown in FIG. 1, the intermediate connecting portion 25 is formed with an engaging recess 91 and an engaging recess 92 having the same width in the disk axial direction on the disk feeding side and the disc turning side. The engaging recess 91 on the disk turning side is recessed from the wall surface on the disk turning side of the intermediate connecting portion 25 toward the disk turning side, and the engaging recess 92 on the disc turning side is the engaging recess 92 on the disc turning side of the intermediate connecting portion 25. It is dented from the wall surface on the disk entry side toward the disk exit side.

The engaging recess 91 has a flat engaging surface 93 on the back side in the recessing direction. The engaging recess 91 is formed by cutting including the engaging surface 93. The engaging surface 93 extends parallel to the disc axis. As shown in FIG. 5, the engaging surface 93 is inclined with respect to the disc radial reference line so that the distance from the disc radial reference line increases toward the inner side in the disc radial direction.

The engaging recess 92 has a flat engaging surface 94 on the back side in the recessing direction. The engaging recess 92 is formed by cutting including the engaging surface 94. The engaging surface 94 extends parallel to the disc axis. The engaging surface 94 is inclined with respect to the disc radial reference line so that the distance from the disc radial reference line increases toward the inner side in the disc radial direction. The engaging surface 93 and the engaging surface 94 have the same angle of angle formed by the surface including the disc radial reference line and the disk axis, and the distance from this surface is the same.

The inner portion of the intermediate connecting portion 25 in the radial direction of the disk is a planar locking surface portion 96 facing inward in the radial direction of the disk. The locking surface portion 96 is formed by cutting. The locking surface portion 96 extends parallel to the disk axis. The locking surface portion 96 is inclined so that the disc turning side is located outside the disc radial direction in the reference line direction with respect to the disc turning side. In other words, the locking surface portion 96 intersects the disk radial reference line without being orthogonal to each other. The locking surface portion 96 tilts the caliper body 15 so as to form an acute angle with respect to a plane orthogonal to the torque receiving surfaces 71A, 71B, 81A, 81B and parallel to the disk axial direction when viewed from the disk axial direction. There is. That is, this plane is extended from the boundary line between the locking surface portion 96 and the engaging surface 93 on the disk turning side to the disk turning side, and the locking surface portion inclination which is an angle formed by the extended portion and the locking surface portion 96. The corners are sharp. The angle formed by the locking surface portion 96 with the engaging surface 93 on the disk turning side is larger than the angle formed with the engaging surface 94 on the disk turning side.

Here, although the inclination angle of the locking surface portion is a minute angle, if the locking surface portion 96 is within the range of the dimensional tolerance, the disk feeding side is always in the reference line direction than the disc feeding side. Is inclined so as to be located on the outer side in the radial direction of the disk. In other words, if the locking surface portion 96 is within the range of the dimensional tolerance, it is always inward in the disk radial direction from the locking surface portion 96, orthogonal to the torque receiving surfaces 71A, 71B, 81A, 81B, and the disk. The shape is rotated around a line parallel to the disc axis so that the distance from the plane parallel to the axis is larger on the disc turn-out side than on the disc turn-in side.

The caliper 12 has a pad spring 101 attached to the inside of the intermediate connecting portion 25 of the caliper body 15 in the disc radial direction, and the caliper 12 is arranged inside the disc radial direction of the pad spring 101 and pressed inward in the disc radial direction by the pad spring 101. It has a pair of friction pads 102 having the same shape and the like.

The pad spring 101 is in contact with the locking surface portion 96 of the intermediate connecting portion 25, is engaged with the engaging recesses 91 and 92, and is attached to the intermediate connecting portion 25. The caliper body 15 supports a pair of friction pads 102 pressed inward in the radial direction of the disc by the pad spring 101 on the inner side in the radial direction of the disc. At that time, the caliper body 15 engages the pair of friction pads 102 so as to be movable in the disk axial direction. As shown in FIG. 4, these pair of friction pads 102 are arranged in the pad arrangement space 61 of the caliper body 15. At that time, the pair of friction pads 102 are arranged so as to face the disk 11. One friction pad 102 is arranged between the cylinder portion 21 on the outer side and the disc 11. The other friction pad 102 is arranged between the cylinder portion 22 on the inner side and the disc 11.

The pad spring 101 is formed by punching and bending a plate material having a constant plate thickness by press molding, and as shown in FIG. 5, the substrate portion 111, the pair of engaging plate portions 112, 113, and FIG. 1 are shown. As described above, it has four extension plate portions 114, 115, 116, 117 and a pair of pressing plate portions 118, 119. 6A and 6B show the pad spring 101 in a natural state before being assembled to the caliper body 15. Here, first, the pad spring 101 in a natural state before being assembled to the caliper body 15 will be described.

The substrate portion 111 has a substantially rectangular flat plate shape.

The pair of engaging plate portions 112 and 113 have the same shape as each other and have a mirror surface target shape. The pair of engaging plate portions 112 and 113 are substantially S-shaped. In the pair of engaging plate portions 112 and 113, one engaging plate portion 112 is located at an intermediate position of one end edge portion of the substrate portion 111, and the other engaging plate portion 113 is located at the intermediate position of the one end edge portion of the substrate portion 111. It is provided at an intermediate position between the opposite end edges. The pair of engaging plate portions 112 and 113 extend from the substrate portion 111 to the same side in the thickness direction of the substrate portion 111.

The extension plate portions 114, 115, 116, 117 are all flat plates. The extending plate portions 114 and 115 are provided so as to sandwich the engaging plate portion 112 between each other at one end edge portion where the engaging plate portion 112 of the substrate portion 111 is provided. The extending plate portions 116 and 117 are provided so as to sandwich the engaging plate portion 113 between the other end edge portions where the engaging plate portion 113 of the substrate portion 111 is provided. The extending plate portions 114 and 115 extend from the substrate portion 111 in the direction opposite to the extending plate portions 116 and 117 along the extending direction of the substrate portion 111. The extending plate portions 116 and 117 extend from the substrate portion 111 in the direction opposite to the extending plate portions 114 and 115 along the extending direction of the substrate portion 111. The extending plate portions 114, 115, 116, 117 are equivalent to the substrate portion 111 so as to be located on the opposite side of the engaging plate portions 112, 113 in the thickness direction of the substrate portion 111 as the distance from the substrate portion 111 increases. It is inclined with an obtuse angle.

The extending plate portions 114 and 115 have a mirror-symmetrical shape with the engaging plate portion 112 sandwiched between them. The extending plate portions 116 and 117 have a mirror-symmetrical shape with the engaging plate portion 113 sandwiched between them. The extending plate portions 114 and 116 have a mirror-symmetrical shape with the substrate portion 111 interposed therebetween. The extending plate portions 115 and 117 have a mirror-symmetrical shape with the substrate portion 111 interposed therebetween.

The pair of pressing plate portions 118 and 119 are flat plates having a substantially rectangular shape and the same shape. On the other hand, the pressing plate portion 118 connects the end edge portions of the extending plate portions 114 and 115 on the opposite side of the substrate portion 111. The pressing plate portion 118 extends from the extending plate portions 114 and 115 in the direction opposite to the substrate portion 111 along the spreading direction of the substrate portion 111. The pressing plate portion 118 is provided so that the angle formed by the substrate portion 111 is larger than the angle formed by the extending plate portions 114 and 115 with the substrate portion 111 and is substantially parallel to the substrate portion 111.

The other pressing plate portion 119 connects the end edge portions of the extending plate portions 116 and 117 opposite to the substrate portion 111. The pressing plate portion 119 extends from the extending plate portions 116 and 117 in the direction opposite to the substrate portion 111 along the spreading direction of the substrate portion 111. The pressing plate portion 119 is provided so that the angle formed by the substrate portion 111 is larger than the angle formed by the extending plate portions 116 and 117 with the substrate portion 111 and is substantially parallel to the substrate portion 111. The pair of pressing plate portions 118, 119 have a mirror-symmetrical shape with the extension plate portions 114, 115, the substrate portion 111, and the extension plate portions 116, 117 interposed therebetween.

In the pad spring 101, for example, the pressing plate portion 118 and the extending plate portions 114 and 115 are on the right side, the pressing plate portion 119 and the extending plate portions 116 and 117 are on the left side, and the pair of extending plate portions 114 and 116 are on the front side. With the extension plate portions 115 and 117 arranged on the (front side) and the rear side (back side), the shape is mirror-symmetrical in the left-right direction and mirror-symmetrical in the front-rear direction. Therefore, the pad spring 101 has the same shape even if it is rotated 180 degrees around the central axis along the thickness direction of the substrate portion 111.

From the above, the pad spring 101 is substantially symmetrical in the direction connecting the extension plate portions 114, 116 and the extension plate portions 115, 117. In the pad spring 101, the direction connecting the extension plate portions 114, 116 and the extension plate portions 115, 117 is arranged in the disk axial direction. Therefore, the pad spring 101 is substantially symmetrical even when viewed from the disc axis direction.

As shown in FIG. 5, the pad spring 101 is attached to the inside of the intermediate connecting portion 25 of the caliper body 15 in the disc radial direction. At that time, the pad spring 101 abuts on the engaging surface 93 of the engaging recess 91 of the intermediate connecting portion 25 at the engaging plate portion 112, and the engaging surface of the engaging recess 92 of the intermediate connecting portion 25 at the engaging plate portion 113. It is attached to the caliper body 15 so as to abut on the 94 and further abut on the locking surface portion 96 of the intermediate connecting portion 25 by the substrate portion 111 by surface contact. The pad spring 101 is attached to the caliper body 15 by sandwiching the intermediate connecting portion 25 while the engaging plate portions 112 and 113 are elastically deformed. At that time, in the pad spring 101, the substrate portion 111 abuts on the locking surface portion 96 of the intermediate connecting portion 25 by surface contact, and the posture with respect to the caliper body 15 is determined. Therefore, the locking surface portion 96 of the caliper body 15 serves as a reference surface for attaching the pad spring 101.

By arranging the pad spring 101 in the pad arrangement space 61 of the caliper body 15, the pad spring 101 is positioned in the disc axial direction with respect to the caliper body 15. Therefore, the pad spring 101 is arranged in the pad arrangement space 61 of the caliper body 15, and is in surface contact with the locking surface portion 96 of the intermediate connecting portion 25 in the substrate portion 111, and the intermediate connecting portion 25 is brought into contact with the engaging plate portions 112 and 113. By sandwiching it, it is positioned in all directions with respect to the caliper body 15.

Here, since the pad spring 101 has a mirror-symmetrical shape in the front-rear direction and the left-right direction as described above, even if the pad spring 101 is inverted in the disk rotation direction and attached to the caliper body 15, the same state as described above is obtained with respect to the caliper body 15. become.

Here, regarding the pad spring 101, of the pair of engaging plate portions, the engaging plate portion that engages with the engaging recess 91 on the disc feeding side is referred to as the engaging plate portion 112, and is engaged with the engaging recess 92 on the disc turning side. The mating engaging plate portion is referred to as an engaging plate portion 113. Further, as shown in FIG. 1, of the four extension plate portions, the extension plate portion arranged on the disk ejection side and the outer side is designated as the extension plate portion 114, and is located on the disk ejection side and the inner side. The extension plate portion to be arranged is the extension plate portion 115, the extension plate portion arranged on the disc entry side and the outer side is the extension plate portion 116, and the extension plate portion arranged on the disk entry side and the inner side. The protruding plate portion is referred to as an extended plate portion 117. Further, of the pair of pressing plate portions, the pressing plate portion arranged on the disk turning side is referred to as the pressing plate portion 118, and the pressing plate portion arranged on the disc turning side is referred to as the pressing plate portion 119.

As shown in FIG. 5, the engaging plate portion 112 extends outward in the disc radial direction from the end edge portion on the disk feeding side of the substrate portion 111 and engages with the engaging recess 91 of the intermediate connecting portion 25. .. The engaging plate portion 113 extends outward in the disc radial direction from the end edge portion on the disk turning side of the substrate portion 111 and engages with the engaging recess 92 of the intermediate connecting portion 25.

As shown in FIG. 5, the pair of extended plate portions 114, 115 on the disk feeding side extend from the edge portion of the substrate portion 111 on the disc feeding side to the disc feeding side. There is. The pressing plate portion 118 on the disc feeding side extends from the end edge portion of the pair of extending plate portions 114, 115 on the disc feeding side to the disc feeding side. As shown in FIG. 5, the pair of extension plate portions 116, 117 on the disk entry side extend from the edge portion of the substrate portion 111 on the disk entry side to the disk entry side. There is. The pressing plate portion 119 on the disc turning side extends from the end edge portion of the pair of extending plate portions 116, 117 on the disc turning side to the disc turning side.

As described above, the pad spring 101 is attached to the caliper body 15 by bringing the substrate portion 111 into contact with the locking surface portion 96 of the intermediate connecting portion 25 by surface contact. In other words, in the pad spring 101, the substrate portion 111 is in contact with the locking surface portion 96 of the intermediate connecting portion 25 in parallel. Here, as described above, the locking surface portion 96 is inclined with respect to a plane orthogonal to the torque receiving surfaces 71A, 71B, 81A, 81B and parallel to the disk axis when the caliper body 15 is viewed from the disk axis direction. ing. Therefore, the pad spring 101 is also attached so as to be inclined with respect to a plane orthogonal to the torque receiving surfaces 71A, 71B, 81A, 81B and parallel to the disk axis when viewed from the disk axis direction. That is, the pad spring 101 abuts on the locking surface portion 96 on the substrate portion 111, so that the pad spring 101 is inclined with respect to a plane orthogonal to the torque receiving surfaces 71A, 71B, 81A, 81B and parallel to the disk axis, and the caliper body 15 It is attached to.

A pair of friction pads 102 are arranged on the side opposite to the intermediate connecting portion 25 of the pad spring 101. In other words, the pad spring 101 is arranged between the intermediate connecting portion 25 and the pair of friction pads 102 and attached to the intermediate connecting portion 25.

In the pad spring 101, the pressing plate portion 118 on the disc feeding side abuts on the disc feeding side portion of the pair of friction pads 102 from the outside in the disc radial direction and presses them inward in the disc radial direction. Further, in the pad spring 101, the pressing plate portion 119 on the disc turning side abuts on the disc turning side portion of the pair of friction pads 102 from the outside in the disc radial direction and presses them inward in the disc radial direction.

The pair of friction pads 102 are common parts having the same shape as each other. The friction pad 102 has a back plate 121 that is long in the disc rotation direction, and a lining material 122 that extends and is attached to one surface of the back plate 121 in the thickness direction in the longitudinal direction of the back plate 121. There is. The friction pad 102 is supported by the caliper body 15 on the back plate 121, and comes into contact with the disc 11 on the lining material 122 to apply braking force to the vehicle.

The back plate 121 has a constant plate thickness, and is on both ends of the main plate portion 130 to which the lining material 122 is attached and both ends of the main plate portion 130 in the disc rotation direction from the outside in the disc radial direction to both outsides in the disc rotation direction. It has a pair of extending portions 131 and an extending portion 132. The main plate portion 130 has a substantially rectangular shape that is long in the disc rotation direction, and the extension portion 131 and the extension portion 132 are both sides of the main plate portion 130 in the longitudinal direction from both ends in the disc rotation direction to the main plate portion 130. It extends in a direction inclined with respect to the longitudinal direction of the motherboard. The longitudinal direction of the main plate portion 130 is the longitudinal direction of the back plate 121, and is the longitudinal direction of the friction pad 102. Therefore, the back plate 121 is a pair of extensions extending in a direction inclined toward the outside in the disc radial direction with respect to the longitudinal direction of the friction pad 102, which is on both ends in the disc rotation direction and is outward in the disc radial direction. The portions 131 and 132 are formed. In other words, the extending portion 131 and the extending portion 132 extend from the end portion of the friction pad 102 in the longitudinal direction in a direction inclined toward the outside in the radial direction of the disk with respect to the longitudinal direction. In the back plate 121, the outer shape of the main plate portion 130 has a mirror-symmetrical shape, and the extending portion 131 and the extending portion 132 have a mirror-symmetrical shape. Therefore, the back plate 121 has a mirror-symmetrical shape in the longitudinal direction thereof.

One of the extending portions 131 is one end side of the main plate portion 130 in the disk rotation direction and extends from the outside in the disc radial direction in a direction away from the main plate portion 130 along the longitudinal direction of the main plate portion 130. The tip side is inclined so as to be located on the outer side in the radial direction of the disk in the reference line direction. The other extending portion 132 extends from the outside in the disc radial direction to the other end side of the main plate portion 130 in the disk rotation direction and extends in a direction away from the main plate portion 130 along the longitudinal direction of the main plate portion 130. The protruding tip side is inclined so as to be located on the outer side in the disc radial direction in the reference line direction.

The main plate portion 130 has a planar base surface portion 141 extending perpendicular to the longitudinal direction of the main plate portion 130 on one side in the longitudinal direction, which is the root position of the extension portion 131, and the root position of the extension portion 132. On the other side in the longitudinal direction, there is a planar base surface portion 142 extending perpendicular to the longitudinal direction of the main plate portion 130. The main plate portion 130 has an outer surface portion 143 that connects the end edges of the pair of extending portions 131 and 132 on the close side to each other on the outer side in the radial direction of the disk. The pair of extending portions 131 and 132 project outward from the outer surface portion 143 in the radial direction of the disk.

The base surface portions 141 and 142 are all planar in the plate thickness direction of the back plate 121. The base surface portions 141 and 142 are parallel to each other. The base surface portion 141 is continuously provided from the extending portion 131, and extends inward from the extending portion 131 in the radial direction of the disk while being orthogonal to the longitudinal direction of the friction pad 102. The base surface portion 142 is continuously provided from the extending portion 132, and extends inward from the extending portion 132 in the radial direction of the disk while being orthogonal to the longitudinal direction of the friction pad 102.

The extending portion 131 extends from between the base surface portion 141 and the outer surface portion 143. The extending portion 131 has a substantially rhombic shape when the back plate 121 is viewed from the plate thickness direction. The extending portion 131 has a surface portion 151 inside the disk radial direction and outside the disk rotation direction, a surface portion 152 inside the disk radial direction and inside the disk rotation direction, and a contact surface portion 153 outside the disk radial direction. Both the surface portions 151 and 152 and the contact surface portion 153 are flat surfaces extending in the plate thickness direction of the back plate 121, and extend along the disk axial direction.

The surface portion 151 extends from the edge portion of the base surface portion 141 on the outer side in the disc radial direction at an angle to the longitudinal direction and the reference line direction of the friction pad 102, and extends outward in the disc radial direction and outside in the disc rotation direction. The face portion 151 and the base surface portion 141 form an obtuse angle. The angle formed by the surface portion 151 and the base surface portion 141 is the same as the angle formed by the flat surface portion 73B of the pad support portion 32B and the torque receiving surface 71B.

The surface portion 152 extends from the edge portion of the outer surface portion 143 on the base surface portion 141 side in the disc rotation direction diagonally with respect to the longitudinal direction and the reference line direction of the friction pad 102, and extends outward in the disc radial direction and outward in the disc rotation direction. It is out. The surface portion 152 and the outer surface portion 143 have an obtuse angle.

The contact surface portion 153 connects the end edge portion of the surface portion 151 opposite to the base surface portion 141 and the end edge portion of the surface portion 152 opposite to the outer surface portion 143. The surface portion 151 and the contact surface portion 153 have an acute angle, and the surface portion 152 and the contact surface portion 153 have an obtuse angle. The contact surface portion 153 is parallel to the longitudinal direction of the friction pad 102.

The extending portion 132 extends from between the base surface portion 142 and the outer surface portion 143. The extending portion 132 has a substantially rhombic shape when the back plate 121 is viewed from the plate thickness direction. The extending portion 132 has a surface portion 161 inside the disk radial direction and outside the disk rotation direction, a surface portion 162 inside the disk radial direction and inside the disk rotation direction, and a contact surface portion 163 outside the disk radial direction. Both the surface portions 161, 162 and the contact surface portions 163 are flat surfaces extending in the plate thickness direction of the back plate 121, and extend along the disk axial direction.

The face portion 161 extends from the end edge portion on the outer side of the disc radial direction of the base surface portion 142 to the outer side in the disc radial direction and the outer side in the disc rotation direction at an angle with respect to the longitudinal direction and the reference line direction of the friction pad 102. .. The surface portion 161 and the base surface portion 142 form an obtuse angle. The angle formed by the surface portion 161 and the base surface portion 142 is the same as the angle formed by the flat surface portion 83B of the pad support portion 33B and the torque receiving surface 81B. The angle is the same as the angle between the two.

The surface portion 162 extends from the edge portion of the outer surface portion 143 on the base surface portion 142 side in the disc rotation direction diagonally with respect to the longitudinal direction and the reference line direction of the friction pad 102, and extends outward in the disc radial direction and outward in the disc rotation direction. It is out. The surface portion 162 and the outer surface portion 143 have an obtuse angle.

The contact surface portion 163 connects the end edge portion of the surface portion 161 opposite to the base surface portion 142 and the end edge portion of the surface portion 162 opposite to the outer surface portion 143. The surface portion 161 and the contact surface portion 163 have an acute angle, and the surface portion 162 and the contact surface portion 163 have an obtuse angle. The contact surface portion 163 is parallel to the longitudinal direction of the friction pad 102. The contact surface portion 163 and the contact surface portion 153 are arranged on the same plane.

When the friction pad 102 is assembled on the inner side of the pad arrangement space 61 of the caliper body 15, the lining material 122 is arranged on the outer side with respect to the back plate 121, and the extending portions 131 and 132 are arranged on the outer side in the disc radial direction. As shown in FIG. 5, the extending portion 131 is locked to the pad locking portion 75B on the disc feeding side, and the extending portion 132 is locked to the pad locking portion 85B on the disc feeding side. It will be.

At that time, in the friction pad 102 arranged on the inner side, the extending portion 132 arranged on the disc feeding side faces the pressing plate portion 118 on the disc feeding side of the pad spring 101 on the contact surface portion 163. It comes into contact with each other and is pressed inward in the disc radial direction by the pressing plate portion 118 and the pair of extending plate portions 114 and 115, and the surface portion 161 abuts on the flat surface portion 83B of the pad locking portion 85B by surface contact. .. Further, in the friction pad 102 arranged on the inner side, the extending portion 131 on the disc turning side abuts on the contact surface portion 153 with the pressing plate portion 119 on the disc turning side of the pad spring 101 to press the friction pad 102. The plate portion 119 and the pair of extension plate portions 116, 117 are pressed inward in the disc radial direction, so that the surface portion 151 abuts on the flat surface portion 73B of the pad locking portion 75B by surface contact.

When the friction pad 102 is assembled on the outer side of the pad arrangement space 61 of the caliper body 15, the lining material 122 is arranged on the inner side with respect to the back plate 121, and the extension portions 131 and 132 are arranged on the outer side in the disc radial direction. In this posture, the extending portion 131 is attached to the pad locking portion 75A of the pad supporting portion 32A on the disc feeding side shown in FIG. 1, and the extending portion 132 is attached to the pad locking portion 85A of the pad supporting portion 33A on the disc feeding side. , Each will be locked.

At that time, in the friction pad 102 arranged on the outer side, the extending portion 131 arranged on the disc feeding side faces the pressing plate portion 118 on the disc feeding side of the pad spring 101 on the contact surface portion 153. It comes into contact with each other and is pressed inward in the disc radial direction by the pressing plate portion 118 and the pair of extending plate portions 114 and 115, and the surface portion 151 abuts on the flat surface portion 73A of the pad locking portion 75A by surface contact. .. Further, in the friction pad 102 arranged on the outer side, the extending portion 132 on the disc turning side abuts on the contact surface portion 163 with the pressing plate portion 119 on the disc turning side of the pad spring 101 to press the friction pad 102. The plate portion 119 and the pair of extension plate portions 116, 117 are pressed inward in the disc radial direction, so that the surface portion 161 abuts on the flat surface portion 83A of the pad locking portion 85A by surface contact.

Here, as shown in FIG. 5, the locking surface portion 96 of the caliper body 15 is inclined so that the disc feeding side is located outside the disc radial direction in the reference line direction with respect to the disc turning side. There is. Therefore, in the pad spring 101, the substrate portion 111 comes into surface contact with the locking surface portion 96 of the caliper body 15, so that the disc feeding side is the reference line rather than the disc turning side, as in the locking surface portion 96. Tilt so that it is located on the outer side of the disc radial direction in the direction. Therefore, the substrate portion 111 is closer to the contact surface portions 153, 163 of the pair of friction pads 102 in the reference line direction on the disc turning side than on the disc turning side. Therefore, the pad spring 101 is an extension plate portion 116 between the pressing plate portion 119 on the disc turning side and the substrate portion 111 that abuts on the contact surface portions 153 and 163 on the disc turning side of the pair of friction pads 102. , 117 The amount of elastic deformation is the extension plate between the pressing plate portion 118 and the substrate portion 111 on the disc feeding side that abuts on the contact surface portions 153 and 163 on the disc feeding side of the pair of friction pads 102. It becomes larger than the elastic deformation amount of the portions 114 and 115. Therefore, the angle formed by the extension plate portions 116, 117 and the pressing plate portion 119 is larger than the angle formed by the extension plate portions 114, 115 and the pressing plate portion 118, and is close to 180 degrees.

As a result, the load that the pad spring 101 presses the pair of friction pads 102 inward in the disc radial direction is such that the load Fin on the disc entry side shown in FIG. 7A is the load Fout on the disk entry side shown in FIG. 7B. Will be larger than.

Here, as shown in FIG. 7A, the surface portion 151 of the extension portion 131 on the disk entry side of the friction pad 102 on the inner side and the flat surface portion 73B of the pad locking portion 75B are shown in the disk entry of the pair of friction pads 102. Let θ be the angle between the surface portions 151 and 161 of the side extending portions 131 and 132 and the flat surface portions 73B and 83A of the pad locking portions 75B and 85A with respect to the disk radial reference line. Then, the load Fin is along the component forces Fin · sinθ in the direction perpendicular to the surface portions 151, 161 and the flat surface portions 73B, 83A on the disk entry side, and the surface portions 151, 161 and the flat surface portions 73B, 83A on the disk entry side. It is divided into the component force Fin · cos θ in the direction.

Further, as shown in FIG. 7B, the surface portion 161 of the extending portion 132 on the disc feeding side of the friction pad 102 on the inner side and the flat surface portion 83B of the pad locking portion 85B are shown on the disc feeding side of the pair of friction pads 102. The angles of the surface portions 151 and 161 of the extending portions 131 and 132 and the flat surface portions 73A and 83B of the pad locking portions 75A and 85B with respect to the disk radial reference line are also θ. Then, the load Fout is along the component forces Fout · sinθ in the direction perpendicular to the surface portions 151, 161 and the flat surface portions 73A, 83B on the disk ejection side, and the surface portions 151, 161 and the flat surface portions 73A, 83B on the disk ejection side. It is divided into the component force Fout · cos θ in the direction.

Then, the friction coefficient μin between the surface portions 151 and 161 of the extension portions 131 and 132 on the disk entry side of the pair of friction pads 102 and the flat surface portions 73B and 83A of the pad locking portions 75B and 85A and the pair of friction pads. It is substantially equivalent to the friction coefficient μout between the surface portions 151 and 161 of the extension portions 131 and 132 on the disk rotation side of 102 and the flat surface portions 73A and 83B of the pad locking portions 75A and 85B. Therefore, a resultant force Ftrol of the component force Fout · cos θ and the component force Fin · cos θ as shown in FIG. 7C is generated from the pad spring 101 to the pair of friction pads 102. This resultant force Ftoll faces inward in the disc radial direction, and since the load Fin on the disc feeding side is larger than the load Fout on the disc feeding side, the disc feeding side in the disc rotation direction. Will be suitable for.

As shown in FIG. 5, in a state where the friction pad 102 arranged on the inner side receives only the urging force of the pad spring 101, the base surface portion 142 of the main plate portion 130 is subjected to the above-mentioned resultant force torque of the pad spring 101. The surface portion 161 of the extending portion 132 is brought into contact with the torque receiving surface 81B on the inner side and the disc feeding side facing the surface by surface contact, and the surface portion 161 of the extending portion 132 is brought into surface contact with the flat surface portion 83B on the inner side and the disc feeding side facing the surface portion 161. In addition, the surface portion 151 of the extension portion 131 is brought into contact with the flat surface portion 73B on the inner side and the disk turning side facing the surface portion 73B by surface contact.

When the caliper body 15 is viewed from the disk axis direction, the angle formed by the locking surface portion 96 and the plane orthogonal to the torque receiving surfaces 71A, 71B, 81A, 81B and parallel to the disk axis is the pad locking portions 75B, 85B. It is set based on the magnitude of the inclination of the flat surface portions 73B and 83B, in other words, the magnitude of the inclination of the surface portions 151 and 161 of the extending portions 131 and 132. That is, it is assumed that the component force Fout is constant and the component force Fin is larger and constant than the component force Fout. In this case, if the angle θ, which is the magnitude of the inclination of the flat surface portions 73B and 83B and the surface portions 151 and 161 is reduced, the component in the disk rotation direction in the resultant force Ftoll becomes small. Therefore, when the angle θ is reduced, it is necessary to increase the difference between the component force Fout and the component force Fin in order to make the component in the disk rotation direction in the resultant force Ftoll sufficiently a predetermined value or more. Therefore, the angle formed by the locking surface portion 96 and the plane orthogonal to the torque receiving surfaces 71A, 71B, 81A, 81B and parallel to the disk axis is increased. On the contrary, when the angle θ is increased, even if the difference between the component force Fout and the component force Fin is reduced, the component in the disk rotation direction in the resultant force Ftoll can be sufficiently set to a predetermined value or more. Therefore, the angle formed by the locking surface portion 96 and the plane orthogonal to the torque receiving surfaces 71A, 71B, 81A, 81B and parallel to the disk axis is reduced.

With the pair of friction pads 102 and the pad spring 101 assembled, the caliper body 15 has a flat surface in which the pad locking portion 75B on the inner side extends along the extending direction of the extending portion 131 of the friction pad 102 on the inner side. It will have a portion 73B. In the friction pad 102 on the inner side, the extending portion 131 comes into contact with the flat surface portion 73B on the surface portion 151 by surface contact, and is locked to the pad locking portion 75B on the inner side. Further, in this state, the caliper body 15 has a flat surface portion 83B in which the pad locking portion 85B on the inner side extends along the extending direction of the extending portion 132 of the friction pad 102 on the inner side. In the friction pad 102 on the inner side, the extending portion 132 abuts on the flat surface portion 83B on the surface portion 161 by surface contact, and is locked to the pad locking portion 85B on the inner side.

Further, in this state, the caliper body 15 has the torque receiving portion 86B on the inner side having the torque receiving surface 81B along the extending direction of the base surface portion 142 of the friction pad 102 on the inner side. The torque receiving portion 76B on the inner side has a torque receiving surface 71B along the extending direction of the base surface portion 141 of the friction pad 102 on the inner side. Further, in this state, the friction pad 102 on the inner side brings the base surface portion 142 of the main plate portion 130 into contact with the torque receiving surface 81B of the torque receiving portion 86B, and the base surface portion 141 of the main plate portion 130 is brought into contact with the torque receiving portion 76B. It will face the torque receiving surface 71B of the above with a slight gap. Further, in this state, in the friction pad 102 on the inner side, the extending portions 131 and 132 are arranged outside the outermost periphery of the disc 11 in the radial direction of the disc.

In a state where the friction pad 102 arranged on the outer side shown in FIGS. 1 and 4 receives only the urging force of the pad spring 101, the base surface portion 141 of the main plate portion 130 is attached to the friction pad 102 by the resultant force torque of the pad spring 101. The torque receiving surface 71A on the facing outer side and the disc feeding side is brought into contact with the surface contact, and the surface portion 151 of the extending portion 131 is brought into contact with the flat surface portion 73A on the outer side and the disc feeding side facing the surface portion 73A. At the same time, the surface portion 161 of the extension portion 132 is brought into contact with the flat surface portion 83A on the outer side and the disk turning side facing the abutment portion 132 by surface contact.

When the caliper body 15 is viewed from the disk axis direction, the angle formed by the locking surface portion 96 and the plane orthogonal to the torque receiving surfaces 71A, 71B, 81A, 81B and parallel to the disk axis is the pad locking portions 75A, 85A. It is set based on the magnitude of the inclination of the flat surface portions 73A and 83A, in other words, the magnitude of the inclination of the surface portions 151 and 161 of the extending portions 131 and 132. That is, it is assumed that the component force Fout is constant and the component force Fin is larger and constant than the component force Fout. In this case, if the angle θ, which is the magnitude of the inclination of the flat surface portions 73A and 83A and the surface portions 151 and 161 is reduced, the component in the disk rotation direction in the resultant force Ftoll becomes small. Therefore, when the angle θ is reduced, it is necessary to increase the difference between the component force Fout and the component force Fin in order to make the component in the disk rotation direction in the resultant force Ftoll sufficiently a predetermined value or more. Therefore, the angle formed by the locking surface portion 96 and the plane orthogonal to the torque receiving surfaces 71A, 71B, 81A, 81B and parallel to the disk axis is increased. On the contrary, when the angle θ is increased, even if the difference between the component force Fout and the component force Fin is reduced, the component in the disk rotation direction in the resultant force Ftoll can be sufficiently set to a predetermined value or more. Therefore, the angle formed by the locking surface portion 96 and the plane orthogonal to the torque receiving surfaces 71A, 71B, 81A, 81B and parallel to the disk axis is reduced.

With the pair of friction pads 102 and the pad spring 101 assembled, the caliper body 15 has a flat surface in which the pad locking portion 75A on the outer side extends along the extending direction of the extending portion 131 of the friction pad 102 on the outer side. It will have part 73A. Further, in the friction pad 102 on the outer side, the extending portion 131 comes into contact with the flat surface portion 73A on the surface portion 151 by surface contact, and is locked to the pad locking portion 75A on the outer side. Further, in this state, the caliper body 15 has a flat surface portion 83A in which the pad locking portion 85A on the outer side extends along the extending direction of the extending portion 132 of the friction pad 102 on the outer side. Further, in the friction pad 102 on the outer side, the extending portion 132 abuts on the flat surface portion 83A on the surface portion 161 by surface contact, and is locked to the pad locking portion 85A on the outer side.

Further, in this state, the caliper body 15 has the torque receiving portion 76A on the outer side having the torque receiving surface 71A along the extending direction of the base surface portion 141 of the friction pad 102 on the outer side. The torque receiving portion 86A has a torque receiving surface 81A along the extending direction of the base surface portion 142 of the friction pad 102 on the outer side. Further, in this state, the friction pad 102 on the outer side brings the base surface portion 141 of the main plate portion 130 into contact with the torque receiving surface 71A of the torque receiving portion 76A, and the base surface portion 142 of the main plate portion 130 is brought into contact with the torque receiving portion 86A. The torque receiving surface 81A of the above surface is opposed to the torque receiving surface 81A with a slight gap. Further, in this state, in the friction pad 102 on the outer side, the extending portions 131 and 132 are arranged outside the outermost periphery of the disc 11 in the radial direction of the disc. As described above, the pair of friction pads 102 are locked to one caliper body 15.

The friction pad 102 on the inner side shown in FIG. 5 is supported by the pad locking portions 75B and 85B on the inner side of the caliper body 15 and moves in the disc axial direction, and at that time, the pad locking portions 75B, In 85B, the extending portions 131 and 132 of the friction pad 102 on the inner side are locked by the flat portions 73B and 83B arranged in a V shape on both sides in the disk rotation direction.

The friction pad 102 on the outer side shown in FIG. 1 is supported by the pad locking portions 75A and 85A on the outer side of the caliper body 15 and moves in the disc axial direction, and at that time, the pad locking portions 75A, In 85A, the extending portions 131 and 132 of the friction pad 102 on the outer side are locked by the flat portions 73A and 83A arranged in a V shape on both sides in the disk rotation direction.

Therefore, the caliper 12 has a so-called pad pinless structure in which the pair of friction pads 102 are directly supported by the caliper body 15 without having the pad pins that support the pair of friction pads 102.

As described above, in the disc brake 10, even if the pad spring 101 has a symmetrical shape, the locking surface portion 96 of the caliper body 15 is arranged parallel to the disc axis, and is orthogonal to the torque receiving surfaces 71A, 71B, 81A, 81B. Moreover, by making the pad spring 101 slanted with respect to the plane parallel to the disc axis, it is possible to set the magnitude of the load Fin on the disc feeding side and the load Fout on the disc feeding side by the pad spring 101. As a result, even with the pad spring 101 having a symmetrical shape, a load can be applied to the pair of friction pads 102 toward the disk rotation side. Therefore, the pair of friction pads 102 can be brought close to the disk rotation side and brought into contact with the torque receiving portions 76A and 86B of the caliper body 15. Therefore, it is possible to suppress the clunk noise generated by the friction pad 102 moving to the disc rotation side and colliding with the torque receiving portions 76A and 86B of the caliper body 15 during braking when the vehicle is traveling forward.

In the above disc brake 10, when the brake fluid is introduced into the cylinder bores 38, 39, 58, 59 of the cylinder portions 21 and 22 shown in FIGS. 2 and 2 through the supply / discharge port 41 shown in FIG. , The four pistons 16 shown in FIG. 4 move in the direction of the disc 11 due to the hydraulic pressure of the brake fluid. Then, the two pistons 16 provided on the cylinder portion 21 on the outer side press the friction pad 102 on the outer side provided between the cylinder portion 21 and the disc 11 to press the lining material 122 against the disc 11. .. Further, the two pistons 16 provided on the cylinder portion 22 on the inner side press the friction pad 102 on the inner side provided between the cylinder portion 22 and the disc 11 to press the lining material 122 against the disc 11. .. As a result, braking force is generated in the vehicle. In other words, the piston 16 on the outer side presses the friction pad 102 on the outer side against the disc 11, and the piston 16 on the inner side presses the friction pad 102 on the inner side against the disc 11.

At this time, the pair of friction pads 102 are locked to the caliper body 15 so that the movement in the disc radial direction and the disc rotation direction is restricted by the pad support portions 32A, 33A, 32B, 33B, and the disc shaft. It will move in the direction.

When moving in the disc axial direction, the friction pad 102 on the inner side shown in FIG. 5 is supported by the pad locking portions 75B and 85B of the pad support portions 32B and 33B on the inner side in the extension portions 131 and 132 and moves. become. At that time, the extending portion 131 slides on the flat surface portion 73B of the pad locking portion 75B on the surface portion 151, and the extending portion 132 slides on the flat surface portion 83B of the pad locking portion 85B on the surface portion 161. When moving in the disc axial direction, the friction pad 102 on the outer side shown in FIG. 1 moves by being locked to the pad locking portions 75A and 85A of the pad support portions 32A and 33A on the outer side in the extending portions 131 and 132. It will be. At that time, the extending portion 131 slides on the flat surface portion 73A of the pad locking portion 75A on the surface portion 151, and the extending portion 132 slides on the flat surface portion 83A of the pad locking portion 85A on the surface portion 161. In this way, the caliper body 15 including the pad locking portions 75A, 75B, 85A, 85B locks the friction pad 102 so as to be movable in the disk axial direction.

At the time of forward braking of the vehicle, the pair of friction pads 102 move to the disc rotation side in contact with the disc 11 in the lining material 122. Then, as shown in FIG. 4, the friction pad 102 on the outer side is pressed against the torque receiving surface 71A of the torque receiving portion 76A on the disc feeding side at the base surface portion 141 of the back plate 121, and is pressed against the inner side. The friction pad 102 is pressed against the base surface portion 142 of the back plate 121 in surface contact with the torque receiving surface 81B of the torque receiving portion 86B on the disc feeding side. As a result, the caliper body 15 mainly receives the braking torque from the pair of friction pads 102 at the torque receiving portions 76A and 86B.

During reverse braking of the vehicle, the pair of friction pads 102 in contact with the disc 11 in the lining material 122 move to the torque receiving portions 76B and 86A. Then, the friction pad 102 on the outer side comes into surface contact with the torque receiving surface 81A of the torque receiving portion 86A at the base surface portion 142 of the back plate 121, and the friction pad 102 on the inner side is pressed against the base surface portion 141 of the back plate 121. , The torque receiving portion 76B is pressed against the torque receiving surface 71B in surface contact with the surface. As a result, the caliper body 15 mainly receives the braking torque from the pair of friction pads 102 at the torque receiving portions 76B and 86A.

In the above-mentioned Patent Document 1, an extension portion extending in a direction inclined with respect to the longitudinal direction of the friction pad is provided on the disc rotation direction end side of the back plate of the friction pad, and is extended to the locking member. A disc brake having a structure in which a pad support portion having a flat surface portion extending along an extension direction of the portion is provided and the extension portion of the friction pad is locked to the pad support portion is disclosed. By the way, in the disc brake, in order to suppress an abnormal noise called a so-called cronking noise generated during braking, the friction pad is brought into contact with the torque receiving portion on the disc feeding side of the locking member by the urging force of the pad spring. It has become. That is, the cronking sound is generated by the friction pad moving to the disk rotation side and colliding with the torque receiving portion of the locking member during braking when the vehicle is traveling forward. Therefore, even during non-braking, the friction pad is urged to the disc feeding side by the urging force of the pad spring and pressed against the torque receiving portion of the locking member to suppress the collision and suppress the cronking noise. It has become. Since it is necessary to urge the friction pad in the disc rotation direction in this way, the shape of the pad spring cannot be simplified and the productivity is lowered.

In the disc brake 10 of the present embodiment, the pair of friction pads 102 extend from the longitudinal end portion of the friction pads 102 in a direction inclined toward the radial outer side of the disc 11 with respect to the longitudinal direction. The portions 131 and 132, the base surface portion 141 extending radially inward from the extending portion 131 while being orthogonal to the longitudinal direction of the friction pad 102, and the extending portion 132 orthogonal to the longitudinal direction of the friction pad 102. It is provided with a base surface portion 142 extending inward in the radial direction of the disc 11. Further, in the disc brake 10, the caliper body 15 has a flat surface portion 73A along the extension direction of the extension portion 131 on the disc rotation side and the outer side, and the pad engagement with the extension portion 131 is locked. A torque receiving portion 75A extending inward from the pad locking portion 75A in the disc radial direction, having a torque receiving surface 71A along the extending direction of the base surface portion 141, and a torque receiving portion with which the base surface portion 141 abuts. It is equipped with 76A. Further, the caliper body 15 has a flat surface portion 83B along the extension direction of the extension portion 132 on the disk rotation side and the inner side, and a pad locking portion 85B to which the extension portion 132 is locked. It is provided extending inward from the pad locking portion 85B in the radial direction of the disk, has a torque receiving surface 81B along the extending direction of the base surface portion 142, and includes a torque receiving portion 86B with which the base surface portion 142 abuts. ing. Further, the caliper body 15 has a flat surface portion 83A along the extension direction of the extension portion 132 on the disk entry side and the outer side, and a pad locking portion 85A to which the extension portion 132 is locked. It is provided extending inward from the pad locking portion 85A in the radial direction of the disk, has a torque receiving surface 81A along the extending direction of the base surface portion 142, and includes a torque receiving portion 86A with which the base surface portion 142 abuts. ing. Further, the caliper body 15 has a flat surface portion 73B along the extending direction of the extending portion 131 on the disk turning side and the inner side, and a pad locking portion 75B to which the extending portion 131 is locked. It is provided so as to extend inward in the disc radial direction from the pad locking portion 75B, has a torque receiving surface 71B along the extending direction of the base surface portion 141, and includes a torque receiving portion 76B with which the base surface portion 141 abuts. ing.

In the disc brake 10 having such a structure, the pad spring 101 is attached so as to be inclined with respect to a plane orthogonal to the torque receiving surfaces 71A, 71B, 81A, 81B when viewed from the axial direction of the disc 11. By tilting the pad spring 101 and attaching it to the caliper body 15 in this way, it is possible to generate an urging force on the pad spring 101 in the disc rotation direction with respect to the pair of friction pads 102. Therefore, the shape of the pad spring 101 can be simplified, and the decrease in productivity can be suppressed.

Further, in the disc brake 10 of the present embodiment, the caliper body 15 has a locking surface portion 96 in which the caliper body 15 is inclined at an acute angle with respect to a plane orthogonal to the torque receiving surfaces 71A, 71B, 81A, 81B when viewed from the axial direction of the disc 11. It is equipped with. Then, the pad spring 101 is attached so as to be inclined with respect to the torque receiving surfaces 71A, 71B, 81A, 81B by abutting on the locking surface portion 96. Therefore, the pad spring 101 can be easily and appropriately tilted and attached to the caliper body 15. Therefore, the pad spring 101 can be easily attached to the caliper body 15. Therefore, the decrease in productivity can be further suppressed. In addition, the inclination of the locking surface portion 96 can be formed by machining. Therefore, the casting that is the material of the caliper body 15 can be used in common for right mounting and left mounting in the vehicle. Therefore, it is possible to reduce the types of cast parts, manage the cast parts, and reduce the mold cost.

Further, in the disc brake 10 of the present embodiment, since the pad spring 101 is substantially symmetrical when viewed from the axial direction of the disc 11, the pad spring 101 is attached to the caliper body 15 without worrying about the direction of the disc rotation direction. Can be done. Therefore, since the pad spring 101 can be easily attached to the caliper body 15, the decrease in productivity can be further suppressed. That is, in order to urge the friction pad in the disc rotation direction by the shape of the pad spring itself, it is necessary to make the pad spring asymmetrical. When the pad spring is asymmetrical in this way, in order to clarify the assembly direction, arrows and letters indicating the direction of assembly are engraved on the pad spring, and the shape to prevent incorrect assembly of the pad spring on the caliper body side. Was required to be provided by machining or casting. Also, in the assembly process, it is necessary to assemble the pad spring to the caliper body while paying attention to the direction of assembly, which requires man-hours, and even after assembly, it is necessary to perform multiple visual inspections to confirm the presence or absence of incorrect assembly. was there. All of these lead to a decrease in productivity. In the disc brake 10 of the present embodiment, since the pad spring 101 is substantially symmetrical when viewed from the axial direction of the disc 11, the pad spring 101 may be marked to indicate the direction of assembly, or the pad spring 101 may be placed on the caliper body 15 side. There is no need to provide a shape to prevent erroneous assembly. Further, the pad spring 101 can be shared for right mounting and left mounting in the vehicle, and it is possible to reduce the types of parts and the management cost and the press mold cost. Therefore, the manufacturing cost of the pad spring 101 and the caliper body 15 can be reduced. Further, the pad spring 101 can be assembled to the caliper body 15 without paying attention to the direction of assembly, and a visual inspection for confirming the presence or absence of erroneous assembly of the pad spring 101 becomes unnecessary. Therefore, the decrease in productivity can be further suppressed.

Further, in the disc brake 10 of the present embodiment, the acute angle formed by the locking surface portion 96 with respect to the plane orthogonal to the torque receiving surfaces 71A, 71B, 81A, 81B is the magnitude of the inclination of the extending portions 131, 132. It is set based on. Therefore, the pad spring 101 can urge the pair of friction pads 102 in the disc rotation direction with an appropriate urging force.

Further, in the disc brake 10 of the present embodiment, since the torque receiving portions 76A and 86B on the rotating side of the disc 11 have the above-mentioned structure, the pad spring 101 satisfactorily receives the torque receiving side of the pair of friction pads 102 on the disc rotating side. It can be brought into contact with the portions 76A and 86B. Therefore, it is possible to effectively suppress the generation of abnormal noise during braking.

Further, in the disc brake 10 of the present embodiment, since the friction pad 102 is common to the inner side and the outer side, it is possible to reduce the types of parts and the management cost of parts.

Here, in the disc brake 10 of the present embodiment, the locking surface portion 96, which is the reference surface for mounting the pad spring 101 in the caliper body 15, is orthogonal to the torque receiving surfaces 71A, 71B, 81A, 81B and parallel to the disc axis. By tilting with respect to a flat surface, the pad spring 101 mounted using this flat surface as a reference for mounting is tilted in the same manner as this flat surface. However, if the pad spring 101 can be attached by inclining it with respect to a plane orthogonal to the torque receiving surfaces 71A, 71B, 81A, 81B and parallel to the disk axis, various other measures are adopted. be able to.

In the first aspect of the present embodiment described above, the friction pad (for example, the friction pad 102) and the body member (for example, the caliper body) for locking the friction pad so as to be movable in the axial direction of the disk (for example, the disk 11). 15) and a pad spring (for example, a pad spring 101) that presses the friction pad inside the radial direction of the disk, and the friction pad is provided with respect to the longitudinal direction from the longitudinal end portion of the friction pad. An extension portion (for example, extension portions 131, 132) extending in a direction inclined toward the radial outer side of the disk and a radial inner side of the disk from the extension portion while being orthogonal to the longitudinal direction. A first flat surface portion (for example, flat surface portions 73A, 73B, 83A, 83B) including an extending base surface portion (for example, base surface portions 141, 142) and the body member along the extending direction of the extending portion. A pad locking portion (for example, pad locking portions 75A, 75B, 85A, 85B) to which the extending portion is locked, and a pad locking portion extending inward in the radial direction from the pad locking portion. It has a second flat surface portion (for example, torque receiving surfaces 71A, 71B, 81A, 81B) along the extending direction of the base surface portion, and a torque receiving portion (for example, torque receiving portions 76A, 76B) with which the base surface portion abuts. , 86A, 86B), and the pad spring is attached so as to be inclined with respect to a plane orthogonal to the second plane portion when viewed from the axial direction of the disc. This makes it possible to suppress a decrease in productivity.

Further, in the second aspect of the present embodiment, in the first aspect, the body member is inclined at an acute angle with respect to a plane orthogonal to the second plane portion when viewed from the axial direction of the disk. A stop surface portion (for example, a locking surface portion 96) is provided, and the pad spring is attached so as to be inclined with respect to a plane orthogonal to the second plane portion by abutting on the locking surface portion.

Further, in the third aspect of the present embodiment, in the second aspect, the pad spring is substantially symmetrical when viewed from the axial direction of the disk.

Further, in the fourth aspect of the present embodiment, in the second aspect, the size of the acute angle is set based on the size of the inclination of the extending portion.

Further, in the fifth aspect of the present embodiment, in the first aspect, the torque receiving portion is the feeding side of the disk.

A sixth aspect of the present embodiment is a friction pad (for example, a friction pad 102), which is radially outside the disk (for example, the disk 11) with respect to the longitudinal direction from the longitudinal end of the friction pad. An extension portion (for example, extension portions 131, 132) extending in a direction inclined toward the surface and a base surface portion (for example, an extension portion 131, 132) extending inward in the radial direction from the extension portion while being orthogonal to the longitudinal direction. A body member (for example, a caliper body 15) that movably locks the friction pad having a base surface portion 141, 142) and the friction pad in the axial direction of the disk, and the extension direction of the extension portion. A pad locking portion (for example, pad locking portions 75A, 75B, 85A, 85B) having a first flat surface portion (for example, flat surface portions 73A, 73B, 83A, 83B) and to which the extending portion is locked. And, it is provided so as to extend inward in the radial direction of the disk from the pad locking portion, and has a second flat surface portion (for example, torque receiving surfaces 71A, 71B, 81A, 81B) along the extending direction of the base surface portion. A body member having a friction receiving portion (for example, torque receiving portions 76A, 76B, 86A, 86B) with which the base surface portion abuts, and a plane orthogonal to the second plane portion when viewed from the axial direction of the disk. It is attached at an angle with respect to the disc, and includes a pad spring (for example, a pad spring 101) that presses the friction pad inside in the radial direction of the disc.

According to the disc brake of the present invention, it is possible to suppress a decrease in productivity. Therefore, the industrial applicability is great.

10 Disc brake 11 Disc 15 Caliper body (body member)
71A, 71B, 81A, 81B Torque receiving surface (second flat surface)
73A, 73B, 83A, 83B Flat surface part (first flat surface part)
75A, 75B, 85A, 85B Pad locking part 76A, 76B, 86A, 86B Torque receiving part 96 Locking surface part 101 Pad spring 102 Friction pad 131, 132 Extension part 141, 142 Base surface part

Claims (6)

1. Friction pad and
   A body member that movably locks the friction pad in the axial direction of the disc, and
   A pad spring that presses the friction pad inward in the radial direction of the disc,
   Equipped with
   The friction pad is
   An extension portion extending from the longitudinal end portion of the friction pad in a direction inclined toward the radial outer side of the disk with respect to the longitudinal direction, and an extension portion.
   A base surface portion extending radially inward from the extending portion while being orthogonal to the longitudinal direction, and a base surface portion extending inward in the radial direction of the disk.
   Equipped with
   The body member
   A pad locking portion having a first plane portion along the extending direction of the extending portion and to which the extending portion is locked,
   A torque receiving portion that extends inward in the radial direction of the disk from the pad locking portion, has a second flat surface portion along the extending direction of the base surface portion, and is in contact with the base surface portion.
   Equipped with
   The pad spring is attached so as to be inclined with respect to a plane orthogonal to the second plane portion when viewed from the axial direction of the disc.
   Disc brake.
2. The body member includes a locking surface portion that is inclined at an acute angle with respect to a plane orthogonal to the second plane portion when viewed from the axial direction of the disk.
   The pad spring is attached so as to be inclined with respect to a plane orthogonal to the second plane portion by abutting on the locking surface portion.
   The disc brake according to claim 1.
3. The pad spring is substantially symmetrical when viewed from the axial direction of the disc.
   The disc brake according to claim 2.
4. The magnitude of the acute angle is set based on the magnitude of the inclination of the extension portion.
   The disc brake according to claim 2.
5. The torque receiving portion is the rotation side of the disc.
   The disc brake according to claim 1.
6. It ’s a friction pad,
   An extension portion extending from the longitudinal end portion of the friction pad in a direction inclined toward the radial outer side of the disk with respect to the longitudinal direction, and an extension portion.
   A base surface portion extending radially inward from the extending portion while being orthogonal to the longitudinal direction, and a base surface portion extending inward in the radial direction of the disk.
   With the friction pad having
   A body member that movably locks the friction pad in the axial direction of the disk, has a first flat surface portion along the extension direction of the extension portion, and the extension portion is locked. Pad locking part and
   A torque receiving portion that extends inward in the radial direction of the disk from the pad locking portion, has a second flat surface portion along the extending direction of the base surface portion, and is in contact with the base surface portion.
   With body members and
   A pad spring that is attached at an angle to a plane orthogonal to the second plane portion when viewed from the axial direction of the disc and presses the friction pad inside the radial direction of the disc.
   With disc brakes.

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