JP2017133653A - Brake caliper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brake caliper not only enabling weight-saving but also capable of improving workability in replacement of a friction material.SOLUTION: A brake caliper 1 of this invention includes: a first claw part 2 arranged oppositely to one surface in an axial direction of a disc rotor; a second claw part 3 arranged oppositely to the first claw part 2 through the disc rotor; a bridge part 4 connecting between the first claw part 2 and the second claw part 3; a first friction material 5 arranged between the first claw part 2 and the disc rotor; a second friction material 6 arranged between the second claw part 3 and the disc rotor; and a piston 7 arranged in at least one of the first claw part 2 and the second claw part 3, and configured to press the first friction material 5 and the second friction material 6 against the disc rotor. The first claw part 2 has a mounting member 21 to a tip surface to which the first friction material 5 is directly connected, and a body member 22 that is connected to the bridge part 4 and on which the mounting member 21 is detachably mounted.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a brake caliper.

  The brake caliper is a member that brakes the wheel by sandwiching a disk rotor that rotates together with the wheel with a friction material. The brake caliper includes two claw portions arranged so as to sandwich the disc rotor, a bridge portion connecting the two claw portions, a friction material arranged between each claw portion and the disc rotor, and a friction material And a piston that presses the disc toward the disc rotor. Examples of the brake caliper include a floating type in which a piston is disposed only on one of the claw portions, and an opposed type in which a piston is disposed on each of the both claw portions. As a brake caliper, it describes in Unexamined-Japanese-Patent No. 2015-121291, for example.

JP2015-121291A

  The brake caliper employs a configuration in which a friction material (lining material) is directly bonded to the caliper in order to reduce the number of parts and weight. However, in this configuration, when replacing the friction material, it is necessary to disassemble almost the entire caliper and replace most of the caliper. That is, there is room for improvement in terms of workability when replacing the friction material.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a brake caliper that can at least be reduced in weight and can further improve workability at the time of replacement of a friction material. And

  The present invention is a brake caliper that is attached to a vehicle by an attachment portion so as to straddle a part of the outer peripheral portion of the disc rotor, and a first claw portion that is disposed to face one axial surface of the disc rotor, and the disc A second claw portion disposed opposite to the first claw portion via the rotor, a bridge portion connecting the first claw portion and the second claw portion, and between the first claw portion and the disk rotor. A first friction material disposed; a second friction material disposed between the second claw portion and the disk rotor; and at least one of the first claw portion and the second claw portion, A piston for pressing one friction material and the second friction material against the disk rotor, and the first claw portion includes a mounting member in which the first friction material is directly fixed to a front end surface, and the bridge The mounting member is connected to the Possible to have a, a body member mounted.

  According to the present invention, since the first friction material is directly fixed to the mounting member, brake pad parts such as a back plate and shim can be omitted from the configuration. Moreover, according to this structure, it is not necessary to provide the holding means which hold | maintains a 1st friction material in a 1st nail | claw part. As a result, the weight and thickness of the brake caliper can be reduced. Further, according to the present invention, since the mounting member can be attached to and detached from the main body member, the replacement of the friction material can be performed by removing the mounting member from the main body member and replacing the first friction material together with the mounting member. it can. As a result, the first friction material can be replaced without disassembling most of the brake caliper, and the replacement workability can be improved.

It is a disassembled perspective view which shows the structure of the brake caliper of 1st embodiment. It is a conceptual sectional view for explaining the composition of the brake caliper of the first embodiment. It is a disassembled perspective view which shows the structure of the brake caliper of 2nd embodiment. It is a conceptual sectional view for explaining the composition of the brake caliper of the second embodiment. It is a conceptual sectional view for explaining the modification mode of the first claw part of the first embodiment. It is explanatory drawing which shows the deformation | transformation aspect of the friction material of this embodiment. It is a conceptual sectional view for explaining the modification mode of the first claw part of the first embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, the same or equivalent parts are denoted by the same reference numerals in the drawings. Moreover, the shape of each part of each figure used for description may not necessarily be exact. In particular, FIGS. 2 and 4 are conceptual cross-sectional views (image diagrams) simply showing the configuration in order to explain the outline of the configuration. Moreover, in FIG. 3, the description of the bottom surface of the cylinder portion is omitted.

  The brake caliper described in the present embodiment is mounted on a vehicle (for example, a four-wheeled vehicle or a two-wheeled vehicle) and exerts a braking force on the disc rotor 9. The disk rotor 9 is a disk-shaped member that is assembled to a rotating body (wheel) and rotates integrally with the rotating body. In the description below, the axial direction of the disk rotor 9 is referred to as “rotor axial direction”, the radial direction of the disk rotor 9 is referred to as “rotor radial direction”, and the circumferential direction of the disk rotor 9 is referred to as “rotor circumferential direction”.

<First embodiment>
The brake caliper 1 of the first embodiment is a floating caliper, and is disposed with respect to the disc rotor 9 so as to straddle part of the outer peripheral portion of the disc rotor 9. The brake caliper 1 is attached to the vehicle by a mount portion (corresponding to an “attachment portion”) 8 so that the caliper body 11 can slide in the rotor axial direction.

  As shown in FIGS. 1 and 2, the brake caliper 1 includes a first claw portion 2, a second claw portion 3, a bridge portion 4, a first friction material 5, a second friction material 6, and a piston 7. And a mount portion 8. The first claw part 2, the second claw part 3, and the bridge part 4 constitute a caliper body 11. Main parts other than the friction materials 5 and 6 of the brake caliper 1 are made of metal. The 1st nail | claw part 2 and the 2nd nail | claw part 3 are extended in the rotor radial direction inner side from the bridge | bridging part 4 so that both surfaces of the disk rotor 9 may be pinched | interposed.

  The first claw portion 2 is a portion of the brake caliper 1 that is disposed opposite to one surface (sliding surface) 91 in the rotor axial direction of the disk rotor 9. That is, the first claw portion 2 is an outer portion that is disposed on one side (the vehicle outer side) of the disk rotor 9 in the rotor axial direction. The first claw portion 2 includes a mounting member 21 and a main body member 22.

  The mounting member 21 is a columnar member. A male screw 211 (not shown in detail) is formed on the outer peripheral surface of the mounting member 21. The first friction material 5 is directly fixed to the other end surface in the rotor axial direction of the mounting member 21, that is, the front end surface 21 a of the mounting member 21. In other words, the first friction material 5 is fixed to the front end surface 21a of the mounting member 21 without a back plate or shim. In the present embodiment, the first friction material 5 is bonded and fixed to the distal end surface 21a of the mounting member 21 with an adhesive or the like. The area of the front end surface 21 a of the mounting member 21 is larger than the area of the axis orthogonal cross section of the portion surrounded by the outer peripheral surface of the piston 7. That is, the front end surface 21a overlaps the entire piston 7 and covers the entire piston 7 when viewed from the rotor axial direction. A hexagonal screw hole 22c is formed on the other end surface in the rotor axial direction of the mounting member 21, that is, the bottom surface 22b facing away from the front end surface 21a of the mounting member 21.

  The main body member 22 is a part connected to the bridge portion 4 and is disposed so as to face the one surface 91 of the disk rotor 9. The main body member 22 is formed integrally with the bridge portion 4, and extends inwardly in the rotor radial direction from one end portion of the bridge portion 4 in the rotor axial direction. The main body member 22 is a part to which the mounting member 21 is detachably mounted. Specifically, a through hole 221 penetrating in the rotor axial direction is formed in the central portion of the main body member 22. In other words, the main body member 22 has a cylindrical through-hole forming portion 222 that forms the through-hole 221 at the central portion thereof.

  A female screw 222 a (not shown in detail) corresponding to the male screw 211 on the outer peripheral surface of the mounting member 21 is formed on the inner peripheral surface of the through-hole forming portion 222. That is, a screw mechanism 2 </ b> A that can be screwed together is formed on the outer peripheral surface of the mounting member 21 and the inner peripheral surface of the through-hole forming portion 222. The mounting member 21 is inserted into the through hole 221 from one side in the rotor axial direction toward the other side in the rotor axial direction, and is fixed by screwing using the screw hole 22c. The screw mechanism 2A has a predetermined screwing position, and is configured such that screw tightening stops at the screwing position. The configuration having the screwing position can be formed, for example, by forming a step on the outer peripheral surface of the mounting member 21 (or the outer peripheral surface of the mounting member 21 and the inner peripheral surface of the through hole forming portion 222).

  As described above, the mounting member 21 is fixed to the main body member 22 while being inserted into the through hole 221. The mounting member 21 can be attached to and detached from the main body member 22 by the screw mechanism 2A. Note that a female screw may be formed on the outer peripheral surface of the mounting member 21, and a male screw may be formed on the inner peripheral surface of the through-hole forming portion 222. In addition, the mounting member 21 and the main body member 22 may be configured such that the mounting member 21 is press-fitted or fitted and fixed to the through hole 221 instead of screwing and fixing by the screw mechanism 2A.

  The second claw portion 3 is a portion of the brake caliper 1 that is disposed opposite to the other surface (sliding surface) 92 in the rotor axial direction of the disk rotor 9. The second claw portion 3 is disposed to face the first claw portion 2 via the disk rotor 9. That is, the second claw portion 3 is an inner portion disposed on the other side (the vehicle inner side) of the disk rotor 9 in the rotor axial direction. The 2nd nail | claw part 3 has the cylinder part 31 in which the piston 7 is slidably arrange | positioned in the position facing the mounting member 21 inside.

  The cylinder portion 31 is a bottomed cylindrical portion that is formed at the center portion of the second claw portion 3 and that is open on the disk rotor 2 side. An annular groove 31a, 31b in which the annular seal members Z1, Z2 are disposed is formed at a portion of the cylinder portion 31 on the opening side. The space between the cylinder portion 31 and the piston 7 is sealed by the seal members Z1 and Z2. It can be said that the piston 7 is detachably attached to the cylinder portion 31. Note that a boot member that expands and contracts according to the advance and retreat of the piston 7 may be disposed in the annular groove 31b at the opening end. Moreover, one annular groove may be sufficient.

  The bridge portion 4 is a portion of the brake caliper 1 that connects the first claw portion 2 and the second claw portion 3. The bridge portion 4 is disposed outside the disk rotor 9 in the rotor radial direction. A first claw portion 2 is formed at one end of the bridge portion 4 in the rotor axial direction, and a second claw portion 3 is formed at the other end of the bridge portion 4 in the rotor axial direction.

  The first friction material 5 and the second friction material 6 are so-called lining materials whose main component is a resin, for example, and press the disk rotor 9 to brake the disk rotor 9. The first friction material 5 is formed in a columnar shape (also called a disc shape) having a predetermined height. The first friction material 5 of the first embodiment is formed in a disk shape having a predetermined thickness and a diameter slightly smaller than the through hole 221. The first friction material 5 is disposed between the first claw portion 2 and the disk rotor 9. Specifically, the first friction material 5 is directly fixed to the distal end surface 21 a of the mounting member 21 coaxially with the mounting member 21. The first friction material 5 can also be said to be an outer pad.

  The second friction material 6 is a plate-like member having a predetermined thickness, and is formed in, for example, a rectangular shape, a trapezoidal shape, or a fan shape. The 2nd friction material 6 of 1st embodiment is formed in the rectangular shape whose corner | angular part is arc shape. The second friction material 6 is disposed between the second claw portion 3 and the disk rotor 9. Specifically, the second friction material 6 is disposed to face the front end surface (opening side end surface) 7 a of the piston 7 through the back plate 61 and the shim set 62. That is, the back plate 61 and the shim set 62 are disposed between the second friction material 6 and the piston 7. The shim set 62 includes, for example, an outer shim and an inner shim.

  The second friction material 6 is disposed in a recess 311 formed at the opening end of the cylinder portion 31 in an initial state where the piston 7 does not advance. The recess 311 has a shape corresponding to the second friction material 6 and is formed so that the second friction material 6 engages in the rotor circumferential direction. The second friction material 6 is pressed against the disk rotor 9 by the advance of the piston 7. The second friction material 6 can be said to be an inner pad.

  The piston 7 is a bottomed cylindrical member opened on the disk rotor 9 side, and is slidably disposed in the cylinder portion 31. That is, the piston 7 is disposed in the second claw portion 3. Piston 7 moves (i.e., moves forward) to one side in the rotor axial direction when brake fluid flows in between the bottom surface of the cylinder portion 31 and the bottom surface of the cylinder portion 31 via an oil passage (not shown). The friction material 6 is pressed against the disk rotor 9. The caliper body 11 slides to the other side in the rotor axial direction with respect to the vehicle by the reaction force of the piston 7 pressing the disk rotor 9 via the second friction material 6, and the first friction material 5 is also moved to the disk rotor 9. Pressed. That is, the piston 7 is a member for pressing the first friction material 5 and the second friction material 6 against the disk rotor 9. In other words, the piston 7 is a member for pressing the first friction material 5 and the second friction material 6 toward the disk rotor 9.

  The mount portion 8 is a known configuration and is a portion for fixing the caliper body 11 to the vehicle so as to be slidable in the rotor axial direction. The mount portion 8 has a pin mechanism 81 that allows the caliper body 11 to slide in the rotor axial direction.

  According to the brake caliper 1 of the first embodiment, since the first friction material 5 is directly fixed to the mounting member 21, brake pad parts such as a back plate and shim can be omitted from the configuration. Further, since the first friction material 5 is fixed to the mounting member 21 and the mounting member 21 is fixed to the main body member 22, it is necessary to provide a holding means for holding the first friction material 5 in the first claw portion 2. Disappear. The holding means is, for example, an engaging means for engaging the first friction material 5 with the caliper body 11, for example, a recess (corresponding to the recess 311) that houses the first friction material 5, or the first friction material 5. The nail | claw-shaped site | part which restrict | limits the movement to the rotor circumferential direction is mentioned. According to the first embodiment, these holding means can be omitted. Accordingly, the caliper body 11 can be reduced in weight, and the caliper body 11 can be thinned, that is, the width of the caliper body 11 in the rotor axial direction can be reduced. The brake caliper 1 is effective for the vehicle from the viewpoint of improving the fuel efficiency of the vehicle, for example, by reducing the weight, and is also effective for installation in a vehicle where the arrangement space is limited.

  Further, according to the first embodiment, since the mounting member 21 is detachable from the main body member 22, in replacing the friction material, the mounting member 21 is detached from the main body member 22, and the entire mounting member 21 is first. The friction material 5 can be replaced. Thereby, it becomes possible to replace the first friction material 5 without disassembling most of the caliper body 11, and the replacement workability is improved. Further, according to the first embodiment, when replacing the first friction material 5, it is not necessary to replace most of the caliper body 11 (for example, the portion including the entire claw portion), for example, the mounting member with the first friction material 5. Replacing 21 is sufficient. As a result, replacement parts can be minimized and the cost of replacement parts can be reduced.

  In addition, according to the first embodiment, the mounting member 21 is fixed to the main body member 22 in a state where the mounting member 21 is inserted into the through hole 221, so that the mounting member 21 is removed from the outside of the caliper body 11 (one side in the rotor axial direction). It can be removed or attached. Thereby, the workability | operativity at the time of replacement | exchange of the 1st friction material 5 further improves. Furthermore, according to the first embodiment, since the screw mechanism 2A is provided as the attaching / detaching means, the mounting member 21 can be attached / detached from the main body member 22 more easily. Further, a screwing position is set in the screw mechanism 2A, and positioning of the first friction material 5 and the mounting member 21 is facilitated.

<Second embodiment>
The brake caliper 1A of the second embodiment is an opposed caliper in which pistons are disposed on both the first claw portion and the second claw portion. In the description of the second embodiment, the description and drawings of the first embodiment can be referred to for the configuration and function of the brake caliper.

  As shown in FIGS. 3 and 4, the brake caliper 1 </ b> A includes a first claw portion 20, a second claw portion 30, a bridge portion 40, a first friction material 50, a second friction material 60, The piston 71, the 2nd piston 72, and the mount part 80 are provided. The first claw part 20, the second claw part 30, and the bridge part 40 constitute a caliper body 110.

  The first claw portion 20 is a portion disposed opposite to the one surface 91 of the disk rotor 9. The 1st nail | claw part 20 has the 1st cylinder part 201 by which the 1st piston 71 is arrange | positioned so that sliding is possible inside. The first piston 71 is a piston on the first claw portion 20 side. The second claw portion 30 is a portion disposed opposite to the other surface 92 of the disk rotor 9. The 2nd nail | claw part 30 has the 2nd cylinder part 301 by which the 2nd piston 72 is arrange | positioned so that sliding is possible inside. The second piston 72 is a piston on the second claw portion 30 side.

  Like the cylinder part 31, the 1st cylinder part 201 and the 2nd cylinder part 301 are formed in the bottomed cylindrical shape which the disk rotor 9 side opened. In the first cylinder part 201 and the second cylinder part 301, like the cylinder part 31, annular grooves X and Y are formed, respectively, and seal members X1 and Y1 are arranged in the annular grooves X and Y, respectively.

  The first claw portion 20 includes a first piston (corresponding to “mounting member”) 71 and a first cylinder portion (corresponding to at least a part of “main body member”) to which the first piston 71 is detachably mounted. 201. Similarly, it can be said that the 2nd nail | claw part 30 is provided with the 2nd piston 72 and the 2nd cylinder part 301 with which the 2nd piston 72 is attached so that attachment or detachment is possible. The first bridge portion 4 connects the first claw portion 20 and the second claw portion 30 on the outer side in the rotor radial direction of the disk rotor 9.

  The first friction material 50 and the second friction material 60 are cylindrical (also called disc-shaped) members. Like the piston 7, the first piston 71 and the second piston 72 are formed in a bottomed cylindrical shape with an opening on the disk rotor 9 side. The first friction material 50 is directly fixed to the front end surface (opening side end surface) 71 a of the first piston 71. The second friction material 60 is directly fixed to the front end surface (opening side end surface) 72 a of the second piston 72. In the second embodiment, the first piston 71 and the first friction material 50 are fixed by adhesion, and the second piston 72 and the second friction material 60 are also fixed by adhesion.

  When brake fluid is supplied to the vicinity of the bottom surface of the first cylinder part 201 via an oil passage (not shown), the first piston 71 moves forward and the first friction material 50 is pressed against the disc rotor 9. Further, when brake fluid is supplied to the vicinity of the bottom surface of the second cylinder portion 301 via an oil passage (not shown), the second piston 72 advances and the second friction material 60 is pressed against the disc rotor 9. Thereby, braking force is exhibited. The mount part 80 is a part formed integrally with the second cylinder part 301 and is a fixing part for fixing the caliper body 110 to the vehicle. In addition, since the brake caliper 1A is an opposed type, sliding is unnecessary and the pin mechanism 81 is unnecessary.

  According to the brake caliper 1A of the second embodiment, there is no need to install a back plate or the like for the first friction material 50 and the second friction material 60, and the brake caliper 1A can be reduced in weight by omitting the back plate or the like. Thinning is possible. Moreover, in 2nd embodiment, holding means, such as a recessed part which hold | maintains a friction material, is unnecessary like 1st embodiment.

  Further, according to the second embodiment, since the pistons 71 and 72 and the corresponding friction materials 50 and 60 are directly fixed, the parts are unitized, and the friction materials 50 and 50 can be removed by removing the pistons 71 and 72. 60 can be removed, which is advantageous in terms of workability for exchanging the friction materials 50 and 60. In the second embodiment, since the pistons 71 and 72 are mounted from the inside of the brake caliper 1A (the disk rotor 9 side), it is necessary to disassemble the bridge portion 40. However, due to unitization, parts such as the back plate are dropped off. The replacement work can be executed without considering the above. In addition, if it is the structure which can remove the bottom face part of the cylinder parts 201 and 301 from a cylindrical part, it will become possible to exchange pistons 71 and 72 with a friction material (50, 60) from the outer side of the brake caliper 1A.

<Other variations>
The present invention is not limited to the above embodiment. For example, as a modification of the first embodiment, the second friction material 6 may be directly fixed to the tip surface 7a of the piston 7 (see FIG. 4). According to this, the back plate 61 and the shim set 62 can be omitted from the configuration also on the second claw portion 3 side, and further weight reduction and thickness reduction are possible. Further, the formation of the recess 311 is not necessary. Further, the configuration on the first claw portion 2 side is a configuration having a back plate and the like, and only the configuration on the second claw portion 3 side is the above configuration, that is, the configuration in which the second friction material 6 is directly fixed to the tip surface 7a. May be. Further, the detachable fixing between the mounting member 21 and the main body member 22 is not limited to screwing fixing, but may be press-fitting fixing, engagement fixing by a projection, or fitting fixing.

  Further, for example, as shown in FIG. 5, an annular portion is formed at the end of the through hole 221 </ b> A of the main body member 22 opposite to the disk rotor 9 (one side in the rotor axial direction) so that the diameter of the through hole 221 </ b> A is reduced. 221A1 may be provided. The inner diameter of the annular portion 221A1 is smaller than the outer diameter of the mounting member 21. For example, unlike the first embodiment, no screw mechanism is provided on the inner peripheral surface of the through-hole forming portion 222B that forms the through-hole 221A. According to this configuration, the mounting member 21 is mounted (for example, inserted, press-fitted, or fitted) from the inside of the disk rotor 9, but when the mounting member 21 is removed, the mounting member 21 is mounted from the inner peripheral side of the annular portion 221A1. It can be extruded and workability can be improved. Moreover, the force to the one side in the rotor axial direction at the time of the brake operation can be received by the annular portion 21, and the displacement of the mounting member 21 can be effectively suppressed.

  Further, as a modification of the second embodiment, one of the first claw portion 20 and the second claw portion 30 has a configuration having a back plate and the other side has a configuration in which the back plate is omitted, that is, a friction material. It is good also as a structure fixed directly to the piston.

  Further, as a modification of the embodiment described so far, each friction material has a predetermined thickness, for example, as shown in FIG. 6, and the upper base and the lower base have a convex arc shape outward in the rotor radial direction. It may be formed in a curved trapezoidal shape. That is, the friction members 5, 6, 50, and 60 may be formed such that the length in the circumferential direction of the rotor is larger at the outer edge in the rotor radial direction than at the inner edge in the rotor radial direction. As a result, the friction material can be formed in a more advantageous shape in the brake operation in which the work amount on the outer side in the rotor radial direction is increased. For example, when the first friction material 5 is a non-circular trapezoidal shape, the mounting member 21 and the through hole 221 may be shaped according to the first friction material 5. Then, the first friction material 5 may be formed so as to fit within the distal end surface 211 of the mounting member 21, and the mounting member 21 with the first friction material 5 may be press-fitted and fixed in the through hole 221.

  Further, the first friction material 5 and the mounting member 21 or the friction materials 50 and 60 and the pistons 71 and 72 are not limited to adhesive fixation, and may be fixed by detachable fitting or the like. According to this, after removing the mounting member 21 or the pistons 50, 60, it is easy to replace only the friction materials 5, 50, 60. Moreover, the cylinder part and piston should just be arrange | positioned at at least one of a 1st nail | claw part and a 2nd nail | claw part, and may be multiply arranged by each claw part. In the present embodiment, the friction material is formed and arranged so as to be within the front end surface of the mounting member, but is not limited thereto. However, the configuration in which the friction material is fixed in the front end surface as in the present embodiment is considered advantageous from the viewpoint of the exchange workability.

  Further, for example, as shown in FIG. 7, the mounting member 21 can be press-fitted and fixed to the main body member 22 without the screw mechanism 2A. Further, instead of the pin mechanism 81, the disk rotor 9 may be configured to slide in the rotor axial direction. Moreover, the material of the 1st friction materials 5 and 50 and the 2nd friction materials 6 and 60 may be used generally, such as resin, a metal, or a composite material.

DESCRIPTION OF SYMBOLS 1, 1A ... Brake caliper, 2, 20 ... 1st nail | claw part, 21 ... Mounting member, 21a ... Tip surface, 22 ... Main body member, 221 ... Through-hole, 222 ... Through-hole formation part, 201 ... 1st cylinder part ( Main body member), 3, 30 ... second claw part, 31 ... cylinder part, 301 ... second cylinder part, 4, 40 ... bridge part, 5, 50 ... first friction material, 6, 60 ... second friction material, 7 ... piston, 71 ... first piston (mounting member), 72 ... second piston, 8, 80 ... mount portion (mounting portion), 9 ... disk rotor.

Claims (6)

A brake caliper that is attached to the vehicle by a mounting portion so as to straddle part of the outer peripheral portion of the disc rotor,
A first claw portion disposed opposite to one axial surface of the disk rotor;
A second claw portion disposed opposite to the first claw portion via the disk rotor;
A bridge portion connecting the first claw portion and the second claw portion;
A first friction material disposed between the first claw portion and the disk rotor;
A second friction material disposed between the second claw portion and the disk rotor;
A piston that is disposed on at least one of the first claw portion and the second claw portion and presses the first friction material and the second friction material against the disk rotor;
With
The first claw portion is a brake caliper having a mounting member in which the first friction material is directly fixed to a front end surface, and a main body member that is connected to the bridge portion and in which the mounting member is detachably mounted. The piston is disposed only on the second claw portion,
The second claw portion has a cylinder portion in which the piston is slidably disposed.
The main body member has a through-hole forming portion that forms a through-hole,
The brake caliper according to claim 1, wherein the mounting member is fixed to the main body member in a state of being inserted into the through hole.   The brake caliper according to claim 2, wherein a screw mechanism that can be screwed together is formed on an outer peripheral surface of the mounting member and an inner peripheral surface of the through-hole forming portion.   The brake caliper according to claim 2 or 3, wherein the second friction material is directly fixed to a front end surface of the piston. In the first claw portion, a first piston which is the piston on the first claw portion side is arranged,
The mounting member constitutes the first piston,
The brake caliper according to claim 1, wherein the main body member includes a first cylinder portion in which the first piston is slidably disposed. In the second claw portion, a second piston that is the piston on the second claw portion side is arranged,
The second claw portion has a second cylinder portion in which the second piston is slidably disposed inside,
The brake caliper according to claim 5, wherein the second friction material is directly fixed to a front end surface of the second piston.

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