Disc brake and cover component

Abstract

In this disc brake, a caliper includes: a cylinder part that has a cylinder bore in which is disposed a piston that moves one of a pair of brake pads; a bridge part that extends outward from the cylinder part so as to straddle an outer circumferential surface of a disc; a plurality of claw parts which are formed on the extension leading-end side of the bridge part and which are disposed to face the cylinder part; and a recessed part that is provided between the plurality of claw parts, has an opening at a radially inner end of the disc, and is formed so as to sit opposite the cylinder bore. An inner surface of the recessed part has an arc-shaped locking groove formed with an arc diameter smaller than an arc diameter of the inner surface, centered on a position offset from a center of a securing part to the turn-out side or the turn-in side. The locking member has a plurality of locking pieces which extend from the securing part in a direction inclined with respect to the movement direction of the piston and which abut the locking groove with elastic force.

Description

Disc brakes and cover parts

[0001] This application claims priority from Japanese Patent Application No. 2024-017389, filed February 7, 2024, the contents of which are incorporated herein by reference.

[0002] 2. Description of the Related Art In some disc brakes, the recess of the caliper is covered with a cover part from the outer side in the vehicle width direction (see, for example, Patent Document 1 listed below).

[0003] DE 4101514 A1

[0004] In a disc brake, it is desirable to firmly attach a cover part to a caliper.

[0005] An object of the present invention is to provide a disc brake and a cover part that can be firmly attached to a caliper with a simple structure.

[0006] In order to achieve the above object, the following aspects have been adopted: A first aspect of the present invention is a disc brake for braking a vehicle having a disc that rotates together with a wheel, comprising: a mounting member attached to a non-rotating portion of the vehicle, a pair of brake pads, a caliper movably provided on the mounting member and pressing the pair of brake pads against the disc, a cover member covering a recessed portion of the caliper, and a locking member fixed to the cover member by a fixing portion and locking the cover member in a state of close contact with the caliper, wherein the caliper comprises a cylinder portion having a cylinder hole in which a piston that moves one of the pair of brake pads is disposed, a bridge portion extending from the cylinder portion across the outer peripheral surface of the disc, and a bridge portion extending from the cylinder portion across the outer peripheral surface of the disc. The disc has a plurality of claws formed on the extending tip side of the ridge portion and arranged opposite the cylinder portion, and a recess portion provided between the plurality of claws, having an opening at the radially inner end of the disc, and formed opposite the cylinder hole, the inner surface of the recess portion having an arc-shaped locking groove centered at a position offset from the center of the fixed portion toward the outgoing or incoming rotation side and formed with an arc diameter smaller than the arc diameter of the inner surface, and the locking member has a plurality of locking pieces extending from the fixed portion in a direction inclined with respect to the movement direction of the piston and abutting the locking groove with elastic force.

[0007] A second aspect of the present invention is a cover component to be assembled to a disc brake, comprising: a mounting member to be attached to a non-rotating portion of a vehicle having a disc that rotates together with a wheel; a pair of brake pads; and a caliper movably mounted on the mounting member and pressing the pair of brake pads against the disc, wherein the caliper has: a cylinder portion having a cylinder hole in which a piston that moves one of the pair of brake pads is disposed; a bridge portion extending from the cylinder portion across the outer circumferential surface of the disc; a plurality of claw portions formed on the extending tip side of the bridge portion and disposed opposite to the cylinder portion; and a recess portion provided between the plurality of claw portions, having an opening at an inner end in the radial direction of the disc, and formed opposite to the cylinder hole, The cover part comprises a cover member that covers the recess portion of the caliper, and a locking member that is fixed to the cover member by a fixing portion and locks the cover member to the caliper, and the inner surface of the recess portion is provided with an arc-shaped locking groove centered at a position offset from the center of the fixing portion toward the outgoing or incoming rotation side and formed with an arc diameter smaller than the arc diameter of the inner surface, and the locking member extends from the fixing portion in a direction inclined with respect to the movement direction of the piston and has a plurality of locking pieces that abut against the locking groove with elastic force.

[0008] According to the above aspects of the present invention, the cover component can be firmly attached to the caliper with a simple structure.

[0009] FIG. 1 is a diagram showing a first embodiment of the present invention, and is a plan view of a disc brake; FIG. 2 is a front view of the disc brake; FIG. 3 is a side view of the disc brake; FIG. 4 is a rear view of the bridge portion of the caliper of the disc brake, showing the reaction portion and the cover part; FIG. 5 is a perspective view of the bridge portion of the caliper body of the disc brake, showing the reaction portion; FIG. 6 is a cross-sectional view of the reaction portion and the cover part of the caliper of the disc brake; FIG. 7 is a rear view of the cover part of the disc brake; FIG. 8 is a perspective view of the cover member of the disc brake; FIG. 9 is a perspective view of the locking member of the disc brake; FIG. 10 is a side view of the cover part of the disc brake; FIG. 11 is a diagram showing a second embodiment of the present invention, and is a rear view of the bridge portion of the caliper of the disc brake, showing the reaction portion and the cover part; FIG. 12 is a perspective view of the disc brake of a third embodiment of the present invention; FIG. 13 is a rear view of the bridge portion of the caliper of the disc brake, showing the reaction portion and the cover part; FIG. 14 is a rear view of the cover part of the disc brake.

[0010] First Embodiment A first embodiment of the present invention will be described below with reference to FIGS.

[0011] 1 to 3, a disc brake 10 of this embodiment is for a vehicle such as an automobile, and is used to apply a braking force to the vehicle, specifically for braking the front wheels of a four-wheeled automobile. The disc brake 10 brakes the vehicle by stopping the rotation of a circular disc 11 that is mounted on the vehicle and rotates together with the wheel (not shown).

[0012] As shown in Fig. 1, the disc brake 10 includes a mounting member 12, a caliper 13, a cover part 14, four pad springs 15, and a pair of boots 16. The disc brake 10 also includes a brake pad 17 and a brake pad 18 shown in Fig. 2.

[0013] Hereinafter, the central axis of the disc 11 will be referred to as the disc axis, and the direction in which the disc axis extends will be referred to as the disc axial direction. The radial direction of the disc 11 within the disc brake 10 will be referred to as the disc radial direction, and the circumferential direction of the disc 11 within the disc brake 10, i.e., the direction of rotation, will be referred to as the disc circumferential direction. The center side of the disc 11 in the disc radial direction will be referred to as the disc radial inner side, and the opposite side of the center of the disc 11 in the disc radial direction will be referred to as the disc radial outer side. The center side of the disc circumferential direction will be referred to as the disc circumferential inner side, and the opposite side of the center in the disc circumferential direction will be referred to as the disc circumferential outer side. A line passing through the disc axis and the circumferential center of the disc brake 10 and extending along the disc radial direction will be referred to as the radial reference line. This radial reference line is perpendicular to the disc axis. A plane including both the radial reference line and the disc axis will be referred to as the radial reference plane. The outer side of the vehicle in the width direction of the vehicle to which the disc brake 10 is attached is referred to as the outer side, and the inner side is referred to as the inner side. The entrance side of the rotation direction R of the disc 11 within the disc brake 10 when the vehicle is moving forward is referred to as the rotation-in side, and the exit side of the rotation direction R of the disc 11 within the disc brake 10 when the vehicle is moving forward is referred to as the rotation-out side.

[0014] As shown in Fig. 2, the mounting member 12 has an inner beam portion 21, a pair of inner pad support portions 22, a pair of outer pad support portions 24, and an outer beam portion 25. As shown in Fig. 1, the mounting member 12 also has a pair of pin insertion portions 27. The mounting member 12 is a casting that is integrally molded by casting, and has a shape that is mirror-symmetrical with respect to a radial reference plane.

[0015] As shown in FIG. 3 , the inner beam portion 21 is disposed on one side of the disk 11 in the disk axial direction and fixed to a non-rotating portion of the vehicle. Here, the non-rotating portion of the vehicle to which the inner beam portion 21 of the mounting member 12 is fixed is disposed on the inner side of the disk 11, and the inner beam portion 21 attached to this non-rotating portion is also disposed on the inner side of the disk 11. Therefore, the inner beam portion 21 is disposed opposite the inner side surface 11a of one of the surfaces 11a, 11b on both sides of the disk 11 in the disk axial direction. As shown in FIG. 2 , the inner beam portion 21 is disposed to extend in the disk circumferential direction, and mounting holes 31 are formed at both ends on the outer side of the disk circumferential direction. The inner beam portion 21 is fixed to the non-rotating portion of the vehicle by bolts (not shown) that are threaded into the respective mounting holes 31. Thus, the mounting member 12 is attached to the non-rotating portion of the vehicle at its inner beam portion 21.

[0016] One of the pair of inner-side pad support portions 22 extends radially outward from the end of the inner beam portion 21 on the inflow side, and the other inner-side pad support portion 22 extends radially outward from the end of the inner beam portion 21 on the outflow side. As shown in Figure 3, the pair of inner-side pad support portions 22 are arranged on the inner side of the disk 11, similar to the inner beam portion 21. Therefore, the pair of inner-side pad support portions 22 are arranged opposite the inner surface 11a of the disk 11.

[0017] As shown in Fig. 3, one of the pair of pin insertion portions 27 extends from the radially outer end of the inner-side pad support portion 22 on one side in the disk circumferential direction, straddling the outer periphery of the disk 11 in the disk axial direction. The other of the pair of pin insertion portions 27 shown in Fig. 1 extends from the radially outer end of the inner-side pad support portion 22 on the other side in the disk circumferential direction, shown in Fig. 2, straddling the outer periphery of the disk 11 in the disk axial direction.

[0018] As shown in Fig. 3 , one of the pair of outer pad support portions 24 extends radially inward from the outer pad support portion 24 on one side of the disk circumferential direction from the opposite side of the inner pad support portion 22, i.e., from the outer-side end of the pin insertion portion 27 on that side of the disk circumferential direction. Also, as shown in Fig. 2 , the other of the pair of outer pad support portions 24 extends radially inward from the outer-side end of the pin insertion portion 27 on that side of the disk circumferential direction. As shown in Fig. 3 , the pair of outer pad support portions 24 is disposed on the outer side of the disk 11. Therefore, the pair of outer pad support portions 24 is disposed opposite the other outer-side surface 11b of the surfaces 11a, 11b on both sides of the disk 11 in the disk axial direction.

[0019] 2, the outer beam portion 25 extends in the disk circumferential direction and connects the disk radially inner ends of the pair of outer pad support portions 24. The outer beam portion 25, like the pair of outer pad support portions 24, is disposed on the outer side of the disk 11. Therefore, the outer beam portion 25 is disposed opposite the outer surface 11b of the disk 11.

[0020] As described above, the mounting member 12 is provided across the outer periphery of the disc 11 and fixed to a non-rotating portion of the vehicle. The inner beam portion 21 and the pair of inner pad support portions 22 are arranged on the inner side of the mounting member 12, which is the side that is attached to the non-rotating portion of the vehicle. The pair of outer pad support portions 24 and the outer beam portion 25 are arranged on the outer side of the mounting member 12, opposite the inner side.

[0021] Pad guide portions 35 are formed on the opposing sides of the pair of outer pad support portions 24. These pad guide portions 35 are recessed in directions away from each other along the disk circumferential direction. Although not shown, similar pad guide portions are also formed on the pair of inner pad support portions 22.

[0022] The four pad springs 15 are each attached to a pair of inner pad support portions 22 and a pair of outer pad support portions 24. The pad spring 15 attached to the outer pad support portion 24 on one side in the disk circumferential direction has a concave guide portion 37 that fits into the concave pad guide portion 35 of this outer pad support portion 24. The pad spring 15 attached to the outer pad support portion 24 on the other side in the disk circumferential direction has a concave guide portion 37 that fits into the concave pad guide portion 35 of this outer pad support portion 24.

[0023] 1 attached to the inner pad support portion 22 on one side in the disk circumferential direction has a concave guide portion (not shown) that fits into the concave pad guide portion (not shown) of this inner pad support portion 22. The pad spring 15 attached to the inner pad support portion 22 on the other side in the disk circumferential direction has a concave guide portion (not shown) that fits into the concave pad guide portion (not shown) of this inner pad support portion 22.

[0024] The brake pad 17 shown in Fig. 1 and the brake pad 18 shown in Fig. 2 are common parts. The brake pad 18 shown in Fig. 2 has a back plate 41, and the back plate 41 has ears 44 on both ends on the outer side in the disc circumferential direction. The brake pad 17 shown in Fig. 1 has the same back plate 41 as the back plate 41 of the brake pad 18 shown in Fig. 1.

[0025] The brake pad 17 has a lining 42. The lining 42 of the brake pad 17 is attached to one surface in the thickness direction of a backing plate 41 of the brake pad 17. The brake pad 18 shown in Fig. 2 has a lining 42 shown in Fig. 3 that is similar to the lining 42 of the brake pad 17. The lining 42 of the brake pad 18 is attached to one surface in the thickness direction of a backing plate 41 of the brake pad 18.

[0026] As shown in Figure 2, the brake pad 18 disposed on the outer side of the brake pads 17, 18 has its ears 44 on both ends on the outer side in the disc circumferential direction fitted into the pad guide portions 35 of the pair of outer pad support portions 24 via the guide portions 37 of the pair of outer pad springs 15. At this time, the pair of pad springs 15 elastically support the brake pad 18. In this way, the outer brake pad 18 is supported by the pair of outer pad support portions 24 of the mounting member 12 via the pair of outer pad springs 15 so as to be movable in the disc axial direction. The brake pad 18 has a lining 42 shown in Figure 3 disposed on the disc 11 side of the back plate 41 in the disc axial direction.

[0027] The brake pad 17 shown in FIG. 1, which is arranged on the inner side of the brake pads 17, 18, has ears (not shown) on both ends of the back plate 41 on the outer side in the disc circumferential direction that fit into respective pad guide portions (not shown) of a pair of inner pad support portions 22 shown in FIG. 2 via respective guide portions (not shown) of a pair of inner pad springs 15. At this time, the pair of pad springs 15 elastically support the brake pad 17 shown in FIG. 1. In this way, the inner brake pad 17 is supported by the pair of inner pad support portions 22 shown in FIG. 2 of the mounting member 12 via the pair of inner pad springs 15 shown in FIG. 1 so as to be movable in the disc axial direction. The brake pad 17 shown in FIG. 1 has a lining 42 arranged on the disc 11 side of the back plate 41 in the disc axial direction.

[0028] The brake pad 17 faces the disc 11 at the lining 42. Therefore, the lining 42 of the brake pad 17 comes into contact with the disc 11. As shown in Figure 3, the brake pad 18 faces the disc 11 at the lining 42. Therefore, the lining 42 of the brake pad 18 comes into contact with the disc 11. The pair of brake pads 17, 18 supported by the mounting member 12 via the pad springs 15 are pressed against the disc 11 by the caliper 13.

[0029] The inner brake pad 17 shown in Fig. 1 is movably provided on the mounting member 12 and is disposed opposite the inner surface 11a of the disk 11. The outer brake pad 18 shown in Fig. 3 is movably provided on the mounting member 12 and is disposed opposite the outer surface 11b of the disk 11.

[0030] The mounting member 12 has a pair of pin insertion holes (not shown) formed in the disk axial direction in each of a pair of pin insertion portions 27 on both sides in the disk circumferential direction shown in FIG. 1 . A pair of slide pins 47 on both sides in the disk circumferential direction of the caliper 13 slidably fit into these pin insertion holes in the mounting member 12. As a result, the mounting member 12 supports the caliper 13 at its pair of pin insertion portions 27 so that it can slide in the disk axial direction. In other words, the pair of slide pins 47 provided on both sides in the disk circumferential direction of the caliper 13 are slidably fitted into pin insertion holes (not shown) in the pair of pin insertion portions 27 of the mounting member 12. As a result, the caliper 13 is mounted on the mounting member 12 so as to be movable in the disk axial direction. Each of the pair of boots 16 covers a portion of the corresponding slide pin 47 that protrudes from the pin insertion portion 27.

[0031] The caliper 13 includes a caliper body 51 , a pair of slide pins 47 , a pair of pin mounting bolts 52 , and a bleeder plug 53 .

[0032] The caliper body 51 is integrally formed by casting. As shown in FIG. 3 , the caliper body 51 has a cylinder portion 55, a bridge portion 56, and a reaction portion 57. In other words, the caliper 13 including the caliper body 51 has the cylinder portion 55, the bridge portion 56, and the reaction portion 57.

[0033] The cylinder portion 55 is disposed on the inner side in the disk axial direction relative to the disk 11. The bridge portion 56 extends from the outer side in the disk radial direction of the cylinder portion 55 to the outer side along the disk axial direction. In other words, the bridge portion 56 extends from the cylinder portion 55 across the outer peripheral surface of the disk 11. The reaction portion 57 extends inward in the disk radial direction from the opposite side of the bridge portion 56 from the cylinder portion 55 in the disk axial direction, and is disposed on the outer side in the disk axial direction relative to the disk 11.

[0034] 1, the caliper body 51 has a pair of pin mounting portions 65 extending from the cylinder portion 55 to both sides in the disk circumferential direction. One slide pin 47 is mounted to one of the pair of pin mounting portions 65 by one pin mounting bolt 52, and the other slide pin 47 is mounted to the other of the pair of pin mounting portions 65 by the other pin mounting bolt 52.

[0035] A pair of cylinder holes 71 shown in FIG. 2 are formed in the cylinder portion 55. Each of the pair of cylinder holes 71 has one end opening toward the reaction portion 57 shown in FIG. 3 and is recessed toward the opposite side of the reaction portion 57 in the disk axial direction. In other words, each of the pair of cylinder holes 71 shown in FIG. 2 is recessed toward the opposite side of the cylinder portion 55 from the disk 11. Each of the pair of cylinder holes 71 is aligned along the disk axial direction. The pair of cylinder holes 71 have the same shape and are provided in the cylinder portion 55 shown in FIG. 3 so as to be aligned in the disk axial direction and the disk radial direction and offset in the disk circumferential direction. The caliper 13 is a so-called two-pot caliper having two cylinder holes 71, in other words, a twin-bore caliper.

[0036] A piston 72 is disposed in each cylinder hole 71 so as to be movable in the disk axial direction. In other words, the cylinder portion 55 shown in Fig. 3 has a cylinder hole 71 in which the piston 72 shown in Fig. 2 is housed. The caliper 13 houses the piston 72 so as to be movable in the disk axial direction. Therefore, the movement direction of the piston 72 is the disk axial direction.

[0037] 3, the reaction portion 57 extends radially inward from the bridge portion 56 and is provided opposite the cylinder portion 55 in the disk axial direction. The reaction portion 57 overlaps with the cylinder portion 55 in the disk radial direction and the disk circumferential direction.

[0038] The outer brake pad 18 is supported by the mounting member 12 and is disposed between the reaction portion 57 shown in FIG. 3 and the disc 11. As shown in FIG. 1, the inner brake pad 17 is supported by the mounting member 12 and is disposed between the cylinder portion 55, a piston 72 provided in the cylinder portion 55, and the disc 11. The piston 72 faces the inner brake pad 17 in the disc axial direction and presses the brake pad 17. Therefore, the cylinder portion 55 has a cylinder hole 71 shown in FIG. 2 in which the piston 72 is disposed, which moves one of the pair of brake pads 17, 18 (shown in FIG. 1).

[0039] 4 and 5 , the reaction portion 57 has a root portion 60 on the bridge portion 56 side, a pair of outer claw portions 61 a (claw portion) and outer claw portions 61 b ​​(claw portion) on both ends opposite the bridge portion 56 and on the outer side in the disk circumferential direction, and an inner claw portion 62 (claw portion) on the opposite side of the bridge portion 56 and between the pair of outer claw portions 61 a, 61 b. The outer claw portion 61 a is located closer to the rotation outlet side than the inner claw portion 62, and the outer claw portion 61 b ​​is located closer to the rotation in side than the inner claw portion 62. The root portion 60, the pair of outer claw portions 61 a, 61 b, and the inner claw portion 62 are all located on the opposite side of the bridge portion 56 from the cylinder portion 55 shown in FIG. 3 in the disk axial direction, and extend inward in the disk radial direction from the bridge portion 56 to be located on the outer side of the disk 11 in the disk axial direction. 4 and 5 are all disposed at the tip of the bridge portion 56 in the direction in which it extends from the cylinder portion 55 shown in Fig. 3. Therefore, the caliper 13 has a caliper body 51 that includes the plurality of outer claws 61 a, 61 b ​​and inner claws 62 shown in Fig. 4 and 5, which are formed at the tip of the bridge portion 56 and disposed opposite the cylinder portion 55 shown in Fig. 3.

[0040] The pair of outer claws 61a, 61b and the inner claw 62 are all positioned to overlap the cylinder portion 55 shown in Fig. 3 in the disk circumferential direction and disk radial direction, and are arranged opposite the cylinder portion 55 in the disk axial direction. As shown in Fig. 4, the outer claw 61a has a narrower width in the disk circumferential direction than the inner claw 62. The outer claw 61b has a wider width in the disk circumferential direction than the inner claw 62.

[0041] The outer claws 61a, 61b and the inner claw 62 are spaced apart in the disk circumferential direction. As a result, the reaction portion 57 has a recess 81a that penetrates in the disk axial direction and extends radially inward between the outer claw 61a and the inner claw 62 on the rotation-out side, which are adjacent in the disk circumferential direction. The reaction portion 57 has a recess 81b that penetrates in the disk axial direction and extends radially inward between the outer claw 61b and the inner claw 62 on the rotation-in side, which are adjacent in the disk circumferential direction. The recess 81a is located closer to the rotation-out side than the recess 81b, and the recess 81b is located closer to the rotation-in side than the recess 81a. The recess 81a is located between the outer claw 61a and the inner claw 62, and is recessed radially outward from the radially inner end of the reaction portion 57. The recess 81b is provided between the outer claw 61b and the inner claw 62, and is recessed from the radially inner end of the reaction portion 57 toward the radially outer end of the disk. Both recesses 81a and 81b have an opening 82 at their radially inner end. The recesses 81a and 81b are mirror-symmetrical in the disk circumferential direction. The reaction portion 57 has three claws: the outer claw 61a on the rotation-out side, the outer claw 61b on the rotation-in side, and the inner claw 62, and therefore has two recesses: the recess 81a on the rotation-out side and the recess 81b on the rotation-in side.

[0042] The caliper body 51 is formed with recesses 81a and 81b, which are opposed in the disk axial direction to the corresponding pairs of cylinder holes 71 shown in Figure 2. The caliper body 51 is provided with the same number of recesses 81a and 81b as the number of cylinder holes 71.

[0043] The outlet-side recess 81a shown in Figures 4 and 5 is provided between the outlet-side outer claw 61a and the inner claw 62, and faces the outlet-side cylinder hole 71 of the two cylinder holes 71 shown in Figure 2 in the disk axial direction, overlapping in the disk circumferential and disk radial directions. The outlet-side recess 81a shown in Figures 4 and 5 is a portion through which a tool is inserted to machine the opposing outlet-side cylinder hole 71 shown in Figure 2. The inlet-side recess 81b shown in Figures 4 and 5 is provided between the inlet-side outer claw 61b and the inner claw 62, and faces the inlet-side cylinder hole 71 of the two cylinder holes 71 shown in Figure 2 in the disk axial direction, overlapping in the disk circumferential and disk radial directions. The inlet-side recess 81b shown in Figures 4 and 5 is a portion through which a tool is inserted to machine the opposing inlet-side cylinder hole 71 shown in Figure 2.

[0044] Therefore, as shown in Figures 4 and 5, the caliper 13 has a caliper body 51 that is provided between the outer claw portion 61a and the inner claw portion 62, has an opening 82 at its radially inner end of the disc, and has a recess portion 81a that is formed opposite the cylinder hole 71 shown in Figure 2 on the rotation side, and a recess portion 81b that is provided between the outer claw portion 61b and the inner claw portion 62, has an opening 82 at its radially inner end of the disc, and is formed opposite the cylinder hole 71 shown in Figure 2 on the rotation side.

[0045] These recesses 81a, 81b are mirror-symmetric in the disk circumferential direction. These recesses 81a, 81b are aligned in the disk axial direction and the disk radial direction, but are offset in the disk circumferential direction, and are arranged side by side in the disk circumferential direction. Because the two recesses 81a, 81b are mirror-symmetric in the disk circumferential direction, the recess 81a on one side will be described as an example.

[0046] As shown in FIG. 4, the inner surface 91 of the recessed portion 81 a has a main surface portion 92 , an outer surface portion 93 , and an inner surface portion 94 .

[0047] The main surface portion 92 has an arc shape made up of a part of a cylindrical surface and is provided on the inner surface 91 radially outward of the disk. The main surface portion 92 has an arc shape made up of a part of a cylindrical surface that is coaxial with the central axis of the cylinder hole 71 shown in FIG. 2. In other words, the main surface portion 92 has an arc shape made up of a part of a cylindrical surface that extends along the disk axial direction. The main surface portion 92 is formed so as to pass through the reaction portion 57 on both sides in the cylinder axial direction. The main surface portion 92 has a semi-cylindrical surface shape. In other words, the main surface portion 92 has a central angle of 180°.

[0048] The outer surface portion 93 has a generally flat surface that extends radially inward from the edge of the main surface portion 92 on the outer claw portion 61 a side and on the inner side in the disk radial direction. The outer surface portion 93 is provided on the inner surface 91 on the outer side in the disk circumferential direction and on the inner side in the disk radial direction.

[0049] The inner side surface portion 94 has a generally flat surface that extends radially inward from the edge of the main surface portion 92 on the inner claw portion 62 side and on the inner side in the disk radial direction. The inner side surface portion 94 is provided on the inner surface 91 on the inner side in the disk circumferential direction and on the inner side in the disk radial direction.

[0050] 5, the inner surface 91 of the recessed portion 81a has a concave surface portion 96. The concave surface portion 96 has a concave surface portion 97 and a chamfered portion 98.

[0051] The concave surface portion 97 has an arc shape consisting of a part of a cylindrical surface whose arc diameter is smaller than the arc diameter of the main surface portion 92 of the inner surface 91. In the recess portion 81a, the central axis of the concave surface portion 97 is parallel to the central axis of the main surface portion 92 and is offset a predetermined distance toward the outlet side from the central axis of the main surface portion 92. As a result, the concave surface portion 97 is recessed in an arc shape from the main surface portion 92 toward the outlet side. The concave surface portion 97 is formed from the outlet side of the main surface portion 92 to the outer surface portion 93. The concave surface portion 97 has a central angle smaller than 180°. The concave surface portion 97 is formed at an intermediate position between the main surface portion 92 and the outer surface portion 93 in the cylinder axial direction.

[0052] The chamfered portion 98 is provided on the opposite side of the cylinder portion 55 from the edge of the concave surface 97 in the disk axial direction. The chamfered portion 98 has the shape of a part of a tapered surface whose diameter increases as it goes away from the cylinder portion 55.

[0053] The inner surface 91 of the recess 81a has a locking groove 101 that is recessed from the middle of the concave surface 97 in the disk axial direction outward in the radial direction of the concave surface 97, i.e., toward the rotation side. In other words, the recess 81 has the locking groove 101 on the inner surface 91. The locking groove 101 is arc-shaped and coaxial with the concave surface 97. Therefore, the central axis of the locking groove 101 is parallel to the central axis of the main surface 92 and is located on the rotation side of the central axis of the main surface 92. The outer end of the locking groove 101 in the disk radial direction is recessed outward in the disk radial direction from the main surface 92, and the inner end of the locking groove 101 in the disk radial direction is recessed from the outer surface 93 toward the rotation side.

[0054] As shown in FIG. 6 , the locking groove 101 has a groove bottom surface 102 and a pair of wall surfaces 103 and 104 .

[0055] As shown in FIG. 5 , the groove bottom surface 102 has an arc shape formed by a portion of a cylindrical surface having an arc diameter larger than that of the concave surface portion 97 but smaller than that of the main surface portion 92 of the inner surface 91. Therefore, the locking groove 101 has an arc shape having an arc diameter larger than that of the concave surface portion 97 but smaller than that of the main surface portion 92 of the inner surface 91. Like the concave surface portion 97, the groove bottom surface 102 also has a central angle smaller than 180°. In the recess portion 81a, the central axis of the groove bottom surface 102, i.e., the central axis of the locking groove 101, is coaxial with the central axis of the concave surface portion 97. As a result, the locking groove 101 is recessed in an arc shape from the concave surface portion 97 toward the rotation outlet side. In the recess 81a, the groove bottom surface 102, i.e., the locking groove 101, has a central axis that is parallel to the central axis of the main surface 92 and is offset a predetermined distance toward the rotation direction from the central axis of the main surface 92. The central axis of the locking groove 101 may be located anywhere in the displacement direction of the disk 11.

[0056] As shown in Figure 6, the pair of wall surfaces 103, 104 are planar and rise inward in the radial direction of the groove bottom surface 102 from both end edges of the groove bottom surface 102 in the disk axial direction. Both of the pair of wall surfaces 103, 104 are planar and extend perpendicular to the central axis of the groove bottom surface 102. In other words, both of the pair of wall surfaces 103, 104 are planar and extend perpendicular to the central axis of the main surface portion 92. Of the pair of wall surfaces 103, 104, the side of the concave surface portion 97 of the wall surface 103 opposite the cylinder portion 55 in the cylinder axial direction, in other words, the inner edge portion of the wall surface 103 in the radial direction, is arc-shaped. This edge portion also has a central angle smaller than 180°.

[0057] Here, the main surface portion 92, the outer surface portion 93, and the inner surface portion 94 can be cast surfaces that are cast when the caliper body 51 is cast. In contrast, the concave surface portion 97 and the chamfered portion 98 of the concave surface portion 96, and the groove bottom surface 102 and the pair of wall surfaces 103, 104 of the locking groove 101 are machined surfaces that are formed on the caliper body 51 by cutting after casting.

[0058] As shown in FIG. 4 , in recess 81b, which is mirror-symmetrical to recess 81a, outer surface 93 has a generally planar shape that extends radially inward from the radially inner edge of main surface 92 on the outer claw 61b side. In recess 81b, concave surface 97 has a central axis parallel to the central axis of main surface 92 and offset a predetermined distance toward the roll-in direction from the central axis of main surface 92. As a result, concave surface 97 of recess 81b is recessed in an arc shape from main surface 92 and outer surface 93 toward the roll-in direction. In recess 81b, locking groove 101 is recessed in an arc shape from concave surface 97 toward the roll-in direction. In recess 81b, locking groove 101 has a central axis parallel to the central axis of main surface 92 and offset a predetermined distance toward the roll-in direction from the central axis of main surface 92.

[0059] Therefore, the caliper 13 is provided with two recesses 81a, 81b, and the locking grooves 101 are provided on the rotation-out side of the recess 81a on one side and on the rotation-in side of the recess 81b on the other side.

[0060] 7, the cover part 14 has a cover member 111 and a locking member 112 that is a member different from the cover member 111. As shown in Fig. 4, two locking members 112 are provided, the same number as the number of recesses 81a, 81b.

[0061] The cover member 111 has a shape shown in FIG. 8 . The cover member 111 is a one-piece molded product made of metal such as aluminum alloy. The cover member 111 has a main plate portion 121 and a pair of protrusions 124 a, 124 b. The material of the cover member 111 is not limited to metal such as aluminum alloy, and the cover member 111 may be one-piece molded using a material such as synthetic resin. While the cover member 111 is preferably one-piece molded, the main plate portion 121 and the pair of protrusions 124 a, 124 b can also be formed separately and fastened together. In this case, the fastening portion is located in a position that is difficult to see from the outer side.

[0062] The main plate 121 is a generally rectangular, flat plate with a generally uniform thickness. The main plate 121 has a mirror-symmetrical shape in the longitudinal direction. The main plate 121 has, on its outer periphery, long edge portions 131 and 132 that run along the longitudinal direction of the main plate 121, and a pair of short edge portions 133.

[0063] One long side edge 131 is generally arc-shaped and bulges outward from the main plate 121 .

[0064] The other long edge 132 is straight.

[0065] One of the pair of short edge portions 133 connects the long edge portions 131 and 132 on one side in the length direction of the main plate portion 121. The other of the pair of short edge portions 133 connects the long edge portions 131 and 132 on the other side in the length direction of the main plate portion 121.

[0066] The pair of protrusions 124a, 124b rise vertically from the main plate portion 121 on the same side in the thickness direction of the main plate portion 121. The pair of protrusions 124a, 124b are spaced apart in the longitudinal direction of the main plate portion 121. The pair of protrusions 124a, 124b are equally distant from the long side edge portion 132.

[0067] 7, the protrusion 124a has an outer peripheral surface 150a in the shape of a regular triangular prism having three side surfaces 151a. The protrusion 124a is formed such that one side surface 151a is parallel to the long edge 132 and faces away from the long edge 132, and the corner between the remaining two side surfaces 151a faces toward the long edge 132. Note that the protrusion 124a may be any polygonal prism, and may be, for example, a pentagonal prism, a heptagonal prism, or another polygonal prism having an odd number of sides, or an even number of sides.

[0068] The protrusion 124b has an outer peripheral surface 150b in the shape of a regular triangular prism having three side surfaces 151b. The protrusion 124b is formed such that one side surface 151b is parallel to the long side edge 132 and faces the long side edge 132, and the corner between the remaining two side surfaces 151b faces the long side edge 132. Note that the protrusion 124b may be any polygonal prism, and may be, for example, a pentagonal prism, a heptagonal prism, or another polygonal prism having an odd number of sides, or an even number of sides.

[0069] Therefore, one side surface 151a of the pair of protrusions 124a and one side surface 151b of the pair of protrusions 124b are parallel to each other and face in opposite directions. In other words, the pair of protrusions 124a and 124b have shapes that are inverted 180 degrees. In other words, when the cover member 111 is positioned so that the long side edge 131 is on top and the long side edge 132 is on the bottom, the protrusions 124a and 124b have upside-down shapes.

[0070] The protrusion 124a is disposed near one of the pair of short side edges 133, and the protrusion 124b is disposed near the other short side edge 133. The distance between the centers of the pair of protrusions 124a, 124b is set to be equal to the distance between the centers of the main surface portions 92 of the pair of recesses 81a, 81b shown in FIG.

[0071] As shown in Figure 9, the two locking members 112 are common parts with the same shape. The locking members 112 are integrally molded products formed by press molding from spring steel plate. The locking members 112 have a base portion 160, a guide portion 161, a fixing portion 162, an extending plate portion 163, an inner bent locking piece 164 (locking piece), an inner bent locking piece 165 (locking piece), an outer bent locking piece 166 (locking piece), and a protruding plate portion 167.

[0072] The substrate portion 160 is a generally circular flat plate with a certain thickness and holes.

[0073] The guide portion 161 has a plurality of guide locking pieces 171. The guide portion 161 has three guide locking pieces 171, the same number as the side surfaces 151a of the protrusion 124a shown in FIG. 7 and the same number as the side surfaces 151b of the protrusion 124b. As shown in FIG. 9, the three guide locking pieces 171 protrude radially inward from the inner peripheral edge of the substrate portion 160. The three guide locking pieces 171 protrude from the substrate portion 160 to the same side in the thickness direction of the substrate portion 160. The three guide locking pieces 171 have the same shape. All three guide locking pieces 171 are shaped to point toward the center of the substrate portion 160 when viewed in the thickness direction of the substrate portion 160. The three guide locking pieces 171 are arranged at equal intervals around the circumferential direction of the substrate portion 160, at 120° intervals.

[0074] The guide locking piece 171 is flat, and protrudes radially inward from the inner peripheral edge of the substrate portion 160 while being inclined relative to the substrate portion 160. The guide locking piece 171 is inclined so that the more it protrudes radially inward from the substrate portion 160, the further it moves away from the substrate portion 160 in the thickness direction of the substrate portion 160.

[0075] The guide locking pieces 171 are generally triangular in shape and point in the opposite direction from the base plate 160. The three guide locking pieces 171 do not have to be generally triangular in shape as long as they are in point or line contact with the protrusions 124a and 124b. The three guide locking pieces 171 are all shaped such that their apexes point toward the center of the base plate 160. The apexes of the three guide locking pieces 171 on the protruding tip side are positioned at the corner positions of an equilateral triangle centered on the central axis of the base plate 160. The positional relationship of the apexes of the three guide locking pieces 171 is the same as the positional relationship of the three corners on the outer periphery of the triangular prism-shaped protrusions 124a and 124b of the cover member 111.

[0076] The central axis of the guide portion 161 having the three guide locking pieces 171 coincides with the central axis of the base portion 160. The guide portion 161 having the three guide locking pieces 171 is provided on the center side of the base portion 160.

[0077] The fixed portion 162 has multiple fixing pieces 175. The fixed portion 162 has three fixing pieces 175, the same number as the side surfaces 151a of the protruding portion 124a and the same number as the side surfaces 151b of the protruding portion 124b. Having three fixing pieces 175 facilitates layout even when there are space constraints. The number of fixing pieces 175 may be three or more, or may be an even number. The three fixing pieces 175 protrude radially inward from the inner peripheral edge of the substrate portion 160. The three fixing pieces 175 protrude from the substrate portion 160 on the same side as the guide locking piece 171 in the thickness direction of the substrate portion 160. The three fixing pieces 175 have the same shape. All three fixing pieces 175 are shaped to point toward the center of the substrate portion 160 when viewed in the thickness direction of the substrate portion 160. The three fixing pieces 175 are arranged alternately with the three guide locking pieces 171, one by one, in the circumferential direction of the substrate portion 160. The three fixing pieces 175 are arranged at equal intervals in the circumferential direction of the substrate portion 160, at intervals of 120°. Each of the three fixing pieces 175 is arranged at an equal distance from the two guide locking pieces 171 on both sides in the circumferential direction of the substrate portion 160. The three fixing pieces 175 and the three guide locking pieces 171 face each other in the radial direction of the substrate portion 160.

[0078] The fixing piece 175 is flat and extends inward in the radial direction of the substrate portion 160 from the inner peripheral edge of the substrate portion 160 while being inclined relative to the substrate portion 160. The fixing piece 175 is inclined so that the further it extends from the substrate portion 160, the further it moves away from the substrate portion 160 in the thickness direction of the substrate portion 160. The tip edge of the fixing piece 175 on the side opposite the substrate portion 160 is linear and parallel to the substrate portion 160.

[0079] The three fixing pieces 175 extend from the base plate portion 160 on the same side in the thickness direction. The three tip edges of the three fixing pieces 175 are arranged to form sides of an equilateral triangle. The equilateral triangle formed by the three tip edges of the three fixing pieces 175 is smaller by an interference amount than the equilateral triangle formed by the three side surfaces 151a of the protruding portion 124a, in other words, the equilateral triangle formed by the three side surfaces 151b of the protruding portion 124b. In other words, the fixing portion 162 having the three fixing pieces 175 has an odd-numbered polygonal shape, specifically a triangular shape.

[0080] The central axis of the fixing portion 162 having the three fixing pieces 175 coincides with the central axis of the base portion 160. The fixing portion 162 having the three fixing pieces 175 is provided on the center side of the base portion 160.

[0081] The extending plate portion 163 is a flat plate disposed on the same plane as the base plate portion 160, and extends outward in the radial direction of the base plate portion 160 from the outer peripheral edge of the base plate portion 160. The extending plate portion 163 is positioned to overlap one guide locking piece 171 and one adjacent fixing piece 175 in the circumferential direction of the base plate portion 160.

[0082] The protruding plate portion 167 is a flat plate disposed on the same plane as the base plate portion 160, and protrudes radially outward from the outer peripheral edge of the base plate portion 160. The protruding plate portion 167 overlaps in position in the circumferential direction of the base plate portion 160 with the fixed piece 175 adjacent to the opposite side to the fixed piece 175 of the guide locking piece 171, of the guide locking piece 171 and the fixed piece 175, which overlap in position with the extending plate portion 163 in the circumferential direction of the base plate portion 160. The protruding plate portion 167 protrudes from the base plate portion 160 in a direction perpendicular to the protruding direction of the extending plate portion 163.

[0083] The locking member 112 is provided with an inner bent locking piece 164, an inner bent locking piece 165, and an outer bent locking piece 166 on the side of the extending plate portion 163 opposite the base plate portion 160. The inner bent locking piece 164 and the inner bent locking piece 165 have the same shape. The outer bent locking piece 166 has a different shape from the inner bent locking pieces 164, 165.

[0084] The locking member 112 is provided with one or more inwardly bent locking pieces of the same shape, specifically two inwardly bent locking pieces 164 and 165. The locking member 112 is provided with one or more outwardly bent locking pieces, specifically one outwardly bent locking piece 166.

[0085] The inner bent locking piece 164, the inner bent locking piece 165, and the outer bent locking piece 166 extend from the edge of the extending plate portion 163 on the side opposite to the base plate portion 160. The inner bent locking piece 164, the inner bent locking piece 165, and the outer bent locking piece 166 extend radially from a predetermined locking central axis that is parallel to the fixed central axis, which is the central axis of the base plate portion 160, the guide portion 161, and the fixed portion 162, and is offset a predetermined distance toward the extending plate portion 163.

[0086] This locking central axis passes through the center of the extending plate portion 163 in the circumferential direction of the base plate portion 160. The distance between the fixed central axis of the locking member 112 and the locking central axis is approximately equal to the distance between the central axis of the main surface portion 92 of the recessed portion 81a of the caliper 13 and the central axes of the concave surface portion 97 and the locking groove 101 provided in the recessed portion 81a. The distance between the fixed central axis and the locking central axis is approximately equal to the distance between the central axis of the main surface portion 92 of the recessed portion 81b and the central axes of the concave surface portion 97 and the locking groove 101 provided in the recessed portion 81b.

[0087] An outer bent locking piece 166 is disposed between the inner bent locking piece 164 and the inner bent locking piece 165 in the circumferential direction of the base plate portion 160. The inner bent locking pieces 164, 165 and the outer bent locking piece 166 extend from the extending plate portion 163 on the same side as the guide portion 161 and the fixed portion 162 in the thickness direction of the extending plate portion 163.

[0088] The outer bent locking piece 166 extends from the extending plate portion 163 in the direction of an extension of a line connecting the fixed central axis and the locking central axis. The outer bent locking piece 166 is provided at the center of the extending plate portion 163 in the direction around the locking central axis. The outer bent locking piece 166 is out of phase with the protruding plate portion 167 by 90 degrees in the direction around the locking central axis.

[0089] The inner bent locking piece 164 and the inner bent locking piece 165 are arranged in mirror symmetry with respect to the outer bent locking piece 166. The distance between the outer bent locking piece 166 and the inner bent locking piece 164 in the direction around the central locking axis is equal to the distance between the outer bent locking piece 166 and the inner bent locking piece 165.

[0090] Each of the inner bent locking pieces 164 and 165 has a base portion 192 and a tip portion 193 .

[0091] The base 192 of each of the inner bent locking pieces 164, 165 is flat. The base 192 extends from the extending plate portion 163 on the same side as the guide portion 161 and the fixed portion 162 in the thickness direction of the extending plate portion 163. The base 192 of each of the inner bent locking pieces 164, 165 is inclined so that the farther it is from the extending plate portion 163 in the thickness direction of the extending plate portion 163, the more outward it is positioned in the radial direction relative to the locking central axis.

[0092] Here, the base portions 192 of the inner bent locking pieces 164, 165 are inclined at the same angle relative to the extending plate portion 163. Therefore, all of the base portions 192 of the inner bent locking pieces 164, 165 as a whole have a shape that increases in diameter as they move away from the extending plate portion 163 in the thickness direction of the extending plate portion 163. The angle that the base portions 192 form with the extending plate portion 163 is an obtuse angle.

[0093] The tip 193 of each of the inner bent locking pieces 164, 165 is flat. The tip 193 extends from the edge of the adjacent base 192 on the opposite side to the extending plate portion 163 in the thickness direction of the extending plate portion 163. The tip 193 of each of the inner bent locking pieces 164, 165 is inclined so that the further away from the extending plate portion 163 in the thickness direction of the extending plate portion 163, the more inward in the radial direction with respect to the locking central axis the tip 193 is.

[0094] Here, the tip portions 193 of the inner bent locking pieces 164, 165 form equal angles with the adjacent base portions 192. Therefore, the tip portions 193 of the inner bent locking pieces 164, 165 are shaped so that the diameter thereof decreases as they move away from the extending plate portion 163 in the thickness direction of the extending plate portion 163. The angle that the tip portions 193 form with the adjacent base portions 192 is an obtuse angle.

[0095] Each of the inner bent locking pieces 164, 165 is bent toward the extending plate portion 163 in the plane direction in which the extending plate portion 163 extends. The convex boundary between each base portion 192 and the adjacent tip portion 193 of each inner bent locking piece 164, 165 is linear. The convex boundary between all of the base portions 192 and the tip portions 193 of each inner bent locking piece 164, 165 is arranged so as to be tangent to the same circle. The convex boundary between all of the base portions 192 and the tip portions 193 of each inner bent locking piece 164, 165 is arranged so that both ends in the extension direction are positioned on the same circle. The center of this circle is the aforementioned central locking axis. The diameter of a circle passing through both ends of the boundary on the convex side between all of the base portions 192 and the tip portions 193 is larger than the diameter of the edge portion on the concave portion 97 side of the wall surface 103 of the locking groove 101 of the recess portion 81, in other words, larger than the diameter of the concave portion 97. In addition, the edges of the extending tips of all of the tip portions 193 of the inner bent locking pieces 164, 165 are arranged so as to be tangent to the same circle.

[0096] The outer bent locking piece 166 has a base portion 202 and a tip portion 203 .

[0097] The base 202 of the outer bent locking piece 166 is flat. The base 202 extends from the extending plate portion 163 on the same side as the inner bent locking pieces 164, 165 in the thickness direction of the extending plate portion 163. The base 202 is inclined so that the farther away from the extending plate portion 163 in the thickness direction of the extending plate portion 163, the more outwardly it is positioned in the radial direction relative to the locking central axis. In other words, the base 202 has a shape that increases in diameter the farther away from the extending plate portion 163 in the thickness direction of the extending plate portion 163. In the outer bent locking piece 166, the angle that the base 202 forms with the extending plate portion 163 is an obtuse angle, which is smaller than the angle that the bases 192 of the inner bent locking pieces 164, 165 form with the extending plate portion 163.

[0098] The tip 203 of the outer bent locking piece 166 is flat and extends from the edge of the base 202 opposite the extending plate portion 163 toward the outside in the radial direction relative to the locking central axis and toward the extending plate portion 163 in the thickness direction of the extending plate portion 163.

[0099] The tip end 203 of the outer bent locking piece 166 is inclined so that the closer it is to the extending plate portion 163 in the thickness direction of the extending plate portion 163, the more outward it is positioned in the radial direction relative to the locking central axis.

[0100] Here, the tip portion 203 of the outer bent locking piece 166 has a shape that increases in diameter as it approaches the extending plate portion 163 in the thickness direction of the extending plate portion 163. The tip portion 203 of the outer bent locking piece 166 forms an acute angle with the base portion 202.

[0101] The outer bent locking piece 166 has a shape bent on the opposite side to the extending plate portion 163 in the plane direction in which the extending plate portion 163 extends. The outer bent locking piece 166 has a straight tip edge on the side opposite the base portion 202 of its tip portion 203. The tip edge of the outer bent locking piece 166 on the side opposite the base portion 202 is arranged so as to be tangent to the same circle. The tip edge of the outer bent locking piece 166 on the side opposite the base portion 202 of the tip portion 203 of the outer bent locking piece 166 has the center of the circle on which both ends in the extension direction are arranged, aligned on the locking central axis. The diameter of the circle through which both ends of the tip edge portion opposite the base portion 202 of the tip portion 203 of the outer bent locking piece 166 pass is larger than the diameter of the edge portion on the concave portion 97 side of the wall surface 103 of the locking groove 101 of the recess portion 81; in other words, it is larger than the diameter of the concave portion 97.

[0102] As shown in Figure 10, one locking member 112 is fitted and fixed to one protrusion 124a of the cover member 111, and as shown in Figure 7, another locking member 112 is similarly fitted and fixed to the other protrusion 124b, thereby forming the cover part 14.

[0103] Specifically, one locking member 112 is press-fitted to one protruding portion 124a while elastically deforming the three fixing pieces 175 of the fixing portion 162. At this time, the one locking member 112 is oriented so that the base plate portion 160 is at the forefront in the fitting direction, and the extending plate portion 163, the inner bent locking piece 164, the inner bent locking piece 165, and the outer bent locking piece 166 are positioned further outward in the longitudinal direction of the cover member 111 than the protruding portion 124a. When the one locking member 112 is fitted to the protruding portion 124a, the three fixing pieces 175 each make line contact at their tip edges with a corresponding one of the three side surfaces 151a of the protruding portion 124a, and the three guide locking pieces 171 move while being guided at their three apexes by the three corners of the outer circumferential surface 150a of the protruding portion 124a. Then, this one locking member 112 is fitted onto the protruding portion 124a until the base plate portion 160 and the extending plate portion 163 abut against the main plate portion 121. Then, the tip edge portions of the three fixing pieces 175 of this one locking member 112 come into line contact with corresponding ones of the three side surfaces 151a of the protruding portion 124a, and the one locking member 112 is locked and fixed to the cover member 111 by the elastic force of the three fixing pieces 175. As a result, this one locking member 112 is fixed to the cover member 111 with the base plate portion 160 and the extending plate portion 163 abutting against the main plate portion 121. In this state, the one locking member 112 orients the protruding plate portion 167 in the direction of the long side edge 131 of the cover member 111.

[0104] Furthermore, the other locking member 112 is fitted to the other protruding portion 124b by press-fitting, elastically deforming the three fixing pieces 175 of the fixing portion 162. At this time, the other locking member 112 is oriented such that the base plate portion 160 and the extending plate portion 163 are at the forefront in the fitting direction, and the extending plate portion 163, the inner bent locking piece 164, the inner bent locking piece 165, and the outer bent locking piece 166 are positioned further outward in the longitudinal direction of the cover member 111 than the protruding portion 124b. When the other locking member 112 is fitted to the protrusion 124b, the tip edges of the three fixing pieces 175 make line contact with a corresponding one of the three side surfaces 151b of the protrusion 124b, and the three guide locking pieces 171 move while being guided at their three apexes by the three corners of the outer circumferential surface 150b of the protrusion 124b. The other locking member 112 is fitted to the protrusion 124b until the base plate portion 160 and the extension plate portion 163 abut against the main plate portion 121. Then, the tip edges of the three fixing pieces 175 of the other locking member 112 come into line contact with a corresponding one of the three side surfaces 151b of the protrusion 124b, and the other locking member 112 is locked and fixed to the cover member 111 by the elastic force of the three fixing pieces 175. As a result, the other locking member 112 is fixed to the cover member 111 with the base plate portion 160 and the extending plate portion 163 abutting against the main plate portion 121. In this state, the other locking member 112 orients the protruding plate portion 167 in the direction of the long side edge portion 132 of the cover member 111.

[0105] In this manner, the pair of locking members 112 are fixed to the cover member 111 to form the cover part 14. In this state, two locking members 112 are arranged along the longitudinal direction of the cover member 111. Each of the pair of locking members 112 is fixed to the cover member 111 at a fixing portion 162. Furthermore, the pair of locking members 112 are provided with inner bent locking pieces 164, 165 and outer bent locking piece 166 that face outward in the longitudinal direction of the cover member 111. Furthermore, as shown in FIG. 10 for one of the pair of locking members 112, the inner bent locking pieces 164, 165 and outer bent locking piece 166 of the pair of locking members 112 extend from the main plate portion 121 of the cover member 111 on the same side as the protrusions 124a, 124b. 7, when cover member 111 is positioned so that long side edge 131 is on top and long side edge 132 is on the bottom, fixing portion 162 fixed to protrusion 124a and fixing portion 162 fixed to protrusion 124b are upside down. A pair of locking members 112 having the same shape are attached to cover member 111 in a 180-degree inverted state.

[0106] 3, the cover part 14 is attached to the bridge part 56 and the reaction part 57 of the caliper body 51. At this time, the cover part 14 is attached to the bridge part 56 and the reaction part 57 from the side opposite to the cylinder part 55 in the disk axial direction.

[0107] When assembled to the bridge portion 56 and the reaction portion 57, the cover part 14 is positioned so that the pair of locking members 112 shown in Figure 6 is at the front and the main plate portion 121 of the cover part 111 is at the rear, and the pair of locking members 112 are fitted into the pair of recess portions 81a, 81b.

[0108] At the initial stage of this engagement, the engaging member 112 engaged with the protrusion 124a has its inner bent engaging pieces 164, 165 abutting at their respective tip portions 193 against the chamfered portion 98 of the recess portion 81a on the outlet side, and its outer bent engaging piece 166 abutting at its tip portion 203 against the chamfered portion 98 of the recess portion 81a on the outlet side.

[0109] Similarly, in the locking member 112 fitted to the protrusion 124b, the inner bent locking pieces 164, 165 each abut against the chamfered portion 98 of the recess portion 81b on the insert side at their tip portions 193, and the outer bent locking piece 166 abuts against the chamfered portion 98 of the recess portion 81b on the insert side at its tip portion 203.

[0110] As the pair of locking members 112 are further engaged, the locking member 112 engaged with the protrusion 124a will have the inner bent locking pieces 164, 165 elastically deform toward the fixed protrusion 124a due to the inclination of the chamfered portion 98 of the recess portion 81a on the outlet side, and will ride up onto the concave portion 97 of the recess portion 81a on the outlet side at the convex boundary between the base 192 and the tip 193, and the outer bent locking piece 166 will elastically deform toward the fixed protrusion 124a due to the inclination of the chamfered portion 98 of the recess portion 81a on the outlet side, and will ride up onto the concave portion 97 of the recess portion 81a on the outlet side at the tip edge of the tip 203 opposite the base 202.

[0111] Similarly, the locking member 112 fitted into the protrusion 124b has its inner bent locking pieces 164, 165 elastically deformed towards the fixed protrusion 124b due to the inclination of the chamfered portion 98 of the recess 81b on the insertion side, and rides up onto the concave portion 97 of the recess 81b on the insertion side at the convex boundary between the base 192 and the tip 193, and its outer bent locking piece 166 elastically deformed towards the fixed protrusion 124b due to the inclination of the chamfered portion 98 of the recess 81b on the insertion side, and rides up onto the concave portion 97 of the recess 81b on the insertion side at the tip edge of the tip 203 opposite the base 202.

[0112] As the engagement of the pair of locking members 112 progresses further, the convex boundary between the base 192 and tip 193 of each of the inner bent locking pieces 164, 165 of the locking member 112 engaged with the protrusion 124a reaches the position of the locking groove 101 of the outlet-side recess 81a, and therefore the inner bent locking pieces 164, 165 each return to their original elastic deformation slightly, and each abuts at its base 192 against the edge of the wall surface 103 of this locking groove 101 on the concave surface 97 side. At this time, the convex boundary between the base 192 and tip 193 of each of the inner bent locking pieces 164, 165 overlaps with the wall surface 103 in the radial direction. At this time, the elastic force of each of these inner bent locking pieces 164, 165 presses each of them at the base 192 into contact with the edge of the wall surface 103 of the locking groove 101 of the outlet recess 81a on the concave surface 97 side.

[0113] In parallel with the above, the locking member 112 fitted onto the protrusion 124a has the tip edge of the tip 203 of the outer bent locking piece 166 opposite the base 202 reach the position of the locking groove 101 of the outlet-side recess 81a, and therefore the outer bent locking piece 166 slightly returns to its original elastic deformation, and the tip edge of the tip 203 opposite the base 202 enters the locking groove 101 and abuts against the wall surface 103 of the locking groove 101 in the direction of the disk axis. In other words, the tip edge of the tip 203 of the outer bent locking piece 166 opposite the base 202 overlaps the wall surface 103 in the radial direction. At this time, the elastic force of the outer bent locking piece 166 presses the tip edge of its tip 203 opposite the base 202 against the groove bottom surface 102 of the locking groove 101 of the outlet recess 81a.

[0114] Similarly, in the locking member 112 fitted onto the protrusion 124b, the convex-side boundary between the base 192 and the tip 193 of each of the inner bent locking pieces 164, 165 reaches the position of the locking groove 101 of the recess 81b on the insertion side, so that each of the inner bent locking pieces 164, 165 slightly returns to its original elastic deformation and each abuts at its base 192 against the edge of the wall surface 103 of this locking groove 101 on the concave surface 97 side. At this time, the elastic force of each of the inner bent locking pieces 164, 165 presses each of them at their base 192 against the edge of the locking groove 101 on the concave surface 97 side of the wall surface 103 of this locking groove 101 of the insertion side recess 81b, causing them to abut at their base 192.

[0115] In parallel with the above, the leading edge of the outer bent locking piece 166 of the locking member 112 fitted onto the protrusion 124b, opposite the base 202 of the tip 203, reaches the position of the locking groove 101 of the recess 81b on the rotation side, and the outer bent locking piece 166 thus returns to its original elastic deformation, and the leading edge of the tip 203 opposite the base 202 enters the locking groove 101 and abuts against the wall surface 103 of the locking groove 101 in the direction of the disk axis. At this time, the elastic force of the outer bent locking piece 166 presses the leading edge of the tip 203 opposite the base 202 against the groove bottom surface 102 of the locking groove 101 of the recess 81b on the rotation side, and abuts against it.

[0116] At this time, the tip edges of the two tip portions 203 opposite the base portion 202 of the outer bent locking pieces 166 of the locking member 112 fitted onto the protrusions 124a and 124b enter the locking grooves 101 and abut against the wall surface 103, and at the same time, the cover member 111 abuts against the bridge portion 56 and the reaction portion 57 of the caliper 13 at the main plate portion 121 and stops. In this manner, the cover part 14 is attached to the caliper 13 with the locking members 112 positioned in the recesses 81a, 81b of the caliper 13. The surfaces of the bridge portion 56 and the reaction portion 57 that abut against the main plate portion 121 may be machined surfaces or cast surfaces. Furthermore, the main plate portion 121 does not have to abut the entire surface of the bridge portion 56 and the reaction portion 57 on the main plate portion 121 side, but only needs to abut partially.

[0117] As shown in FIG. 4 , when the cover part 14 is assembled to the caliper 13 as described above, the cover member 111 covers the pair of recesses 81 a, 81 b from the opposite side of the cylinder portion 55 in the disk axial direction, i.e., the outer side. That is, the main plate portion 121 of the cover part 111 overlaps the pair of recesses 81 a, 81 b in the disk circumferential direction and the disk radial direction. Here, in the assembled cover part 14, the main plate portion 121 covers at least the pair of recesses 81 a, 81 b in the disk radial direction and entirely covers the outer claw portions 61 a, 61 b ​​and the inner claw portion 62 in the disk circumferential direction. In addition, in this assembled state, the pair of locking members 112 of the cover part 14 are spaced apart in the disk circumferential direction, elastically fixing the cover part 111 to the caliper 13.

[0118] In addition, when the cover part 14 is assembled, the elastic force of the multiple inner bent locking pieces 164, 165 of the locking member 112 on the outlet side causes the convex boundary between the base 192 and the tip 193 to enter the locking groove 101 of the recess portion 81a, maintaining the base 192 in contact with the edge portion on the concave portion 97 side of the wall surface 103 of the locking groove 101 of the recess portion 81a.

[0119] In addition, when the cover part 14 is assembled, the elastic force of the multiple inner bent locking pieces 164, 165 of the locking member 112 on the insertion side causes the convex boundary between the base 192 and the tip 193 to enter the locking groove 101 of the recess portion 81b, maintaining the base 192 in contact with the edge portion on the concave portion 97 side of the wall surface 103 of the locking groove 101 of the recess portion 81b.

[0120] In the assembled cover part 14, the central locking axis of the locking member 112 on the outlet side coincides with the central axis of the locking groove 101 of the recess 81 a on the outlet side. In the assembled cover part 14, the central locking axis of the locking member 112 on the inlet side coincides with the central axis of the locking groove 101 of the recess 81 b on the inlet side.

[0121] Here, in the assembled cover part 14, the bases 192 of the multiple inner bent locking pieces 164, 165 of the locking member 112 on the rotation side are inclined so that their diameters increase as they move away from the main plate 121. Therefore, in the locking member 112 on the rotation side, the elastic force of these inner bent locking pieces 164, 165 generates a component in a direction that causes the main plate 121 to abut against the bridge portion 56 and the reaction portion 57. Similarly, in the assembled cover part 14, the elastic force of the multiple inner bent locking pieces 164, 165 of the locking member 112 on the rotation side also generates a component in a direction that causes the main plate 121 to abut against the bridge portion 56 and the reaction portion 57. As a result, in the assembled cover part 14, the pair of locking members 112, each fixed to the cover member 111 by the fixing portions 162, elastically abut the main plate portion 121 of the cover member 111 against the bridge portion 56 and the reaction portion 57, in other words, lock the main plate portion 121 in a tight contact state with no gaps. At this time, the main plate portion 121 mainly abuts against the bridge portion 56 and the reaction portion 57 at a portion that is radially outward of the protrusions 124a and 124b.

[0122] In addition, as shown in Figure 6, the outer bent locking piece 166 of the locking member 112 on the rotation side in the assembled state of the cover part 14 restricts movement in the direction away from the reaction part 57 in the opposite direction to the cylinder part 55 by abutting against the wall surface 103 of the locking groove 101 of the recess part 81a with which the reaction part 57 engages.

[0123] In addition, when the cover part 14 is assembled, the outer bent locking piece 166 of the locking member 112 on the insertion side restricts movement in the direction away from the reaction part 57 in the opposite direction to the cylinder part 55 by abutting against the wall surface 103 of the locking groove 101 of the recess part 81b with which the reaction part 57 engages.

[0124] In the assembled cover part 14, the cover member 111 covers the two recess portions 81a, 81b of the caliper 13 from the axial direction of the cylinder bore 71. In the assembled cover part 14, a pair of locking members 112 fix the cover member 111 to the caliper 13. In the assembled cover part 14, the pair of locking members 112 are fixed to the cover member 111 at the fixing portions 162, respectively.

[0125] Furthermore, the rotation-side locking member 112 of the assembled cover part 14 has its inner bent locking pieces 164, 165 extending from its fixed part 162 in the axial direction of the rotation-side cylinder bore 71 where the rotation-side locking member 112 is positioned in the disk circumferential direction, that is, inclined with respect to the movement direction of the piston 72 provided in the rotation-side cylinder bore 71, so as to approach the rotation-side cylinder bore 71 in this movement direction. The rotation-side locking member 112 of the assembled cover part 14 has each of the inner bent locking pieces 164, 165 bent inward in the radial direction of the rotation-side cylinder bore 71. The rotation-side locking member 112 of the assembled cover part 14 has each of the inner bent locking pieces 164, 165 abutting, at the base 192, against an edge portion on the concave surface portion 97 side of the wall surface 103 of the locking groove 101 of the engaging recess 81a.

[0126] Furthermore, the turn-in side locking member 112 of the assembled cover part 14 has its inner bent locking pieces 164, 165 extending from its fixed part 162 in the axial direction of the turn-in side cylinder bore 71 where the turn-in side locking member 112 is positioned in the disk circumferential direction, that is, inclined with respect to the movement direction of the piston 72 provided in the turn-in side cylinder bore 71, so as to approach the turn-in side cylinder bore 71 in this movement direction. The turn-in side locking member 112 of the assembled cover part 14 has each of the inner bent locking pieces 164, 165 bent inward in the radial direction of the turn-in side cylinder bore 71. The turn-in side locking member 112 of the assembled cover part 14 has each of the inner bent locking pieces 164, 165 abutting, at the base 192, against an edge portion on the concave surface portion 97 side of the wall surface 103 of the locking groove 101 of the engaging recess 81b with which it is to be engaged.

[0127] In addition, the retaining member 112 on the rotation side of the cover part 14 in the assembled state has an inner bent retaining piece 164, 165 and an outer bent retaining piece 166 that are symmetrical, specifically, linearly symmetrical, with respect to the line connecting the fixed central axis that is the center of the fixed part 162 and the arc center of the retaining groove 101 of the recess part 81a to which the retaining member 112 on the rotation side is engaged.

[0128] Furthermore, the locking member 112 on the insert side of the cover part 14 in the assembled state has an inner bent locking piece 164, 165 and an outer bent locking piece 166 that are symmetrical, specifically, linearly symmetrical, with respect to the line connecting the fixed central axis that is the center of the fixed part 162 and the arc center of the locking groove 101 of the recess part 81b to which the locking member 112 on the insert side is locked.

[0129] Furthermore, the rotation-side locking member 112 of the assembled cover part 14 has its outer bent locking piece 166 extending from its fixed part 162 in the axial direction of the rotation-side cylinder hole 71 where the rotation-side locking member 112 is positioned in the disk circumferential direction, that is, while tilting with respect to the movement direction of the piston 72 provided in the rotation-side cylinder hole 71, so as to approach the rotation-side cylinder hole 71 in this movement direction. The rotation-side locking member 112 of the assembled cover part 14 has its outer bent locking piece 166 bent outward in the radial direction of the rotation-side cylinder hole 71. The rotation-side locking member 112 of the assembled cover part 14 has its outer bent locking piece 166 abutting against the wall surface 103 of the locking groove 101 of the engaging recess 81a at the tip edge of the tip portion 203 opposite the base portion 202.

[0130] Furthermore, the turn-in side locking member 112 of the assembled cover part 14 has its outer bent locking piece 166 extending from its fixed part 162 in the axial direction of the turn-in side cylinder bore 71 where the turn-in side locking member 112 is positioned in the disk circumferential direction, that is, at an angle with respect to the movement direction of the piston 72 provided in the turn-in side cylinder bore 71, so as to approach the turn-in side cylinder bore 71 in this movement direction. The turn-in side locking member 112 of the assembled cover part 14 has its outer bent locking piece 166 bent outward in the radial direction of the turn-in side cylinder bore 71. The turn-in side locking member 112 of the assembled cover part 14 has its outer bent locking piece 166 abutting against the wall surface 103 of the locking groove 101 of the engaging recess 81b at the tip edge of the tip portion 203 opposite the base portion 202.

[0131] Furthermore, in the assembled cover part 14, the locking member 112 on the rotation side has a fixed central axis, which is the center of its fixed portion 162, and a line connecting the protruding plate portion 167, which is parallel to the radial reference line. In the assembled cover part 14, the locking member 112 on the rotation side has a fixed central axis, which is the center of its fixed portion 162, and a line connecting the protruding plate portion 167, which is the center of its fixed portion 162, and a line connecting the protruding plate portion 167, which is parallel to the radial reference line. In the assembled cover part 14, the protruding plate portion 167 of the locking member 112 on the rotation side and the protruding plate portion 167 of the locking member 112 on the rotation side face in opposite directions in the extension of the radial reference line. In the assembled cover part 14, the protruding plate portion 167 of the locking member 112 on the rotation side faces outward in the disk radial direction, and the protruding plate portion 167 of the locking member 112 on the rotation side faces inward in the disk radial direction.

[0132] Furthermore, the cover member 111 of the cover part 14 in the assembled state has a pair of protrusions 124a, 124b that protrude from the main plate portion 121 in the axial direction of the cylinder bore 71 so as to approach the cylinder bore 71. The locking member 112 on the outlet side of the cover part 14 in the assembled state has a plurality of guide locking pieces 171 on the center side of its fixed portion 162 that abut against the outer peripheral surface 150a of the corresponding protrusion 124a on the outlet side. The locking member 112 on the inlet side of the cover part 14 in the assembled state has a plurality of guide locking pieces 171 on the center side of its fixed portion 162 that abut against the outer peripheral surface 150b of the corresponding protrusion 124b on the inlet side.

[0133] In addition, in the assembled cover part 14, the inner bent locking pieces 164, 165 and the outer bent locking piece 166 of the locking member 112 on the outlet side extend from the fixed part 162 in the axial direction of the cylinder hole 71 on the outlet side, in other words, in a direction inclined with respect to the movement direction of the piston 72 on the outlet side. In the assembled cover part 14, the inner bent locking pieces 164, 165 and the outer bent locking piece 166 of the locking member 112 on the inlet side extend from the fixed part 162 on the outlet side in the axial direction of the cylinder hole 71, in other words, in a direction inclined with respect to the movement direction of the piston 72 on the inlet side.

[0134] In addition, in the assembled state, the cover part 14 has the inner bent locking pieces 164, 165 and the outer bent locking piece 166 of the locking member 112 on the rotation side elastically abutting the inner surface 91 of the recess portion 81a with which it engages. In the assembled state, the cover part 14 has the inner bent locking pieces 164, 165 and the outer bent locking piece 166 of the locking member 112 on the rotation side provided in the recess portion 81a. The locking member 112 on the rotation side of the assembled cover part 14 elastically abuts the inner surface 91 of the recess portion 81b with which it engages, and the inner bent locking pieces 164, 165 and the outer bent locking piece 166 are provided in the recess portion 81b. Therefore, in the caliper 13 with the cover part 14 assembled, the locking members 112 are disposed in each of the two recess portions 81a, 81b.

[0135] In the assembled state, the inner bent locking pieces 164, 165 and the outer bent locking piece 166 of the locking member 112 on the outlet side of the cover part 14 abut against the locking groove 101 of the recess 81 a with which they are engaged. In the assembled state, the inner bent locking pieces 164, 165 and the outer bent locking piece 166 of the locking member 112 on the inlet side of the cover part 14 abut against the locking groove 101 of the recess 81 b with which they are engaged.

[0136] In addition, in the assembled cover part 14, the cover member 111 abuts against the bridge portion 56 radially outward of the protrusions 124a, 124b to which the pair of locking members 112 are fixed.

[0137] In addition, in the assembled cover part 14, the main plate portion 121 is mirror-symmetrical in the disk circumferential direction.

[0138] Furthermore, inner surface 91 of recess 81a on the rotation side of caliper 13 when cover part 14 is assembled has arc-shaped locking groove 101 whose center is offset a predetermined distance toward the rotation side from the fixed central axis, which is the center of fixed portion 162 of locking member 112 on the rotation side, and which has an arc diameter smaller than the arc diameter of main surface 92 of inner surface 91. Locking member 112 on the rotation side of cover part 14 in the assembled state has a plurality of locking pieces, including inner bent locking pieces 164, 165, and outer bent locking pieces 166, which extend from fixed portion 162 in a direction inclined with respect to the direction of movement of piston 72 and elastically contact locking groove 101 on the rotation side.

[0139] Furthermore, the inner surface 91 of the recess portion 81b on the turn-in side of the caliper 13 when the cover part 14 is in an assembled state has an arc-shaped locking groove 101 whose center is offset a predetermined distance toward the turn-in side from the fixed central axis, which is the center of the fixed part 162 of the locking member 112 on the turn-in side, and which is formed with an arc diameter smaller than the arc diameter of the main surface part 92 of this inner surface 91. The locking member 112 on the turn-in side of the assembled cover part 14 has a plurality of locking pieces, including an inner bent locking piece 164, an inner bent locking piece 165, and an outer bent locking piece 166, which extend from the fixed part 162 in a direction inclined with respect to the direction of movement of the piston 72 and which elastically abut against the locking groove 101 on the turn-in side.

[0140] In the disc brake 10, brake fluid is introduced into two cylinder holes 71 in the cylinder portion 55 of the caliper 13 via brake piping (not shown). Brake fluid pressure then acts on pistons 72 in each of the two cylinder holes 71. As a result, both pistons 72 move forward toward the disc 11, pressing the inner brake pad 17 of the brake pads 17, 18, which is located between the pistons 72 and the disc 11, toward the disc 11. This causes the brake pad 17 to move in the disc axial direction and come into contact with the surface 11a of the disc 11 at the lining 42. In other words, the piston 72 that moves the inner brake pad 17 of the brake pads 17, 18, is located in the cylinder hole 71 of the cylinder portion 55.

[0141] Furthermore, the reaction force of this pressure causes the caliper body 51 to slide the pair of slide pins 47 relative to the mounting member 12, moving in the disc axial direction, and the reaction portion 57 presses the outer brake pad 18, of the brake pads 17, 18, which is positioned between the reaction portion 57 and the disc 11, toward the disc 11. As a result, the brake pad 18 moves in the disc axial direction and contacts the surface 11b of the disc 11 at the lining 42.

[0142] In this way, the caliper 13 clamps the pair of brake pads 17, 18 from both sides between the pistons 72 and the reaction portion 57 by actuation of the multiple pistons 72, and presses them against both surfaces 11a, 11b of the disc 11. As a result, the caliper 13 applies frictional resistance to the disc 11, generating braking force. The caliper 13 is a floating-type caliper and a fist-type caliper.

[0143] The disc brake described in Patent Document 1 has a cover part covering the caliper recess from the outside in the vehicle width direction. However, it is desirable for the cover part in disc brakes to be firmly attached to the caliper. For example, the disc brake described in Patent Document 1 has a gap between the cover part and the caliper, which could allow foreign objects such as dirt and snow to enter the interior through the gap, potentially causing the cover part to come off the caliper. Furthermore, wind could enter the gap while driving, potentially generating wind noise.

[0144] In the disc brake 10 and cover component 14 of the first embodiment, a cover member 111 covering the recessed portions 81a, 81b of the caliper 13 is locked in close contact with the caliper 13 by a locking member 112 fixed to the cover member 111 by a fixing portion 162. This allows the cover component 14 and the caliper 13 to be tightly fitted together, preventing a gap from forming between them. Therefore, the disc brake 10 and cover component 14 can tightly fit the cover component 14 and the caliper 13 without any gaps, preventing foreign matter such as soil and snow from entering the interior. This prevents the cover component 14 from coming off the caliper 13. Furthermore, the generation of abnormal noises such as wind noise can be suppressed.

[0145] In the disc brake 10 and the cover part 14, the inner surface 91 of the recess 81 a on the rotation side of the caliper 13 has an arc-shaped locking groove 101 whose center is a position offset a predetermined distance toward the rotation side from a fixed central axis that is the center of a fixed portion 162 of a locking member 112 fixed to the projection 124 a on the rotation side, and which is formed with an arc diameter smaller than the arc diameter of the main surface 92 of the inner surface 91. The locking member 112 fixed to the projection 124 a on the rotation side has inner bent locking pieces 164, 165 and outer bent locking piece 166 that extend from the fixed portion 162 in a direction inclined with respect to the movement direction of the piston 72 and elastically abut against the locking groove 101 on the inner surface 91 of the recess 81 a on the rotation side.

[0146] Furthermore, in the disc brake 10 and the cover part 14, the inner surface 91 of the recess 81b on the rotation side of the caliper 13 has an arc-shaped locking groove 101 whose center is a position offset a predetermined distance toward the rotation side from the fixed central axis, which is the center of the fixed portion 162 of the locking member 112 fixed to the protrusion 124b on the rotation side, and whose arc diameter is smaller than the arc diameter of the main surface portion 92 of the inner surface 91. The locking member 112 fixed to the protrusion 124b on the rotation side has inner bent locking pieces 164, 165 and outer bent locking piece 166 that extend from the fixed portion 162 in a direction inclined with respect to the movement direction of the piston 72 and elastically abut against the locking groove 101 on the inner surface 91 of the recess 81b on the rotation side.

[0147] Therefore, the disc brake 10 and the cover component 14 have a simple structure, and the cover component 14 can be firmly attached to the caliper 13. Furthermore, since the processing length of the locking groove 101 can be shortened, processing costs can be reduced.

[0148] The disc brake 10 and the cover part 14 have two recesses 81a, 81b formed in the caliper 13, with a locking member 112 disposed in each of the recesses 81a, 81b. The disc brake 10 and the cover part 14 have locking grooves 101 formed on the inlet side of one recess 81b and on the outlet side of the other recess 81a. This minimizes the number of locking locations in the disc brake 10 and the cover part 14, reducing the number of machining locations and improving the material yield of the locking members.

[0149] In the disc brake 10 and the cover part 14, the inner bent locking pieces 164, 165 and the outer bent locking piece 166 of the locking member 112 fixed to the protruding part 124a are symmetrical with respect to a line connecting the fixed central axis that is the center of the fixed part 162 and the center of the arc of the locking groove 101 with which they engage. Also, in the disc brake 10 and the cover part 14, the inner bent locking pieces 164, 165 and the outer bent locking piece 166 of the locking member 112 fixed to the protruding part 124b are symmetrical with respect to a line connecting the fixed central axis that is the center of the fixed part 162 and the center of the arc of the locking groove 101 with which they engage. Therefore, the disc brake 10 and the cover part 14 have a simple structure and can attach the cover part 14 to the caliper 13 more firmly.

[0150] In the disc brake 10 and the cover component 14, each fixing portion 162 of the two locking members 112 has an odd-numbered polygonal shape, specifically a triangular shape with three fixing pieces 175, and is upside down. This allows the two locking members 112 required for a twin-bore caliper to be made of a common part with the same shape. This reduces the number of parts and reduces costs. Furthermore, the odd-numbered polygonal shape prevents incorrect assembly of the locking members 112 to the cover component.

[0151] In the disc brake 10 and the cover part 14, the inner bent locking pieces 164, 165 and the outer bent locking piece 166 of the locking member 112 are symmetrical with respect to the line connecting the fixed central axis and the arc center of the locking groove 101, so that the force acting in the direction of the opening of the recess portions 81a, 81b of the locking member 112 can be made uniform.

[0152] In the disc brake 10 and the cover component 14, the pair of locking members 112 have the inner bent locking pieces 164, 165 and the outer bent locking piece 166 respectively facing outward in the longitudinal direction of the cover component 111, which reduces the amount of material used for the locking members 112 and improves yield. Also, because it is only necessary to provide one locking groove 101 in each of the recesses 81a, 81b, the number of places where the caliper 13 must be lowered can be reduced. Also, the cover component 14 can be attached to the caliper 13 more firmly.

[0153] Second Embodiment Next, a second embodiment of the present invention will be described, focusing on differences from the first embodiment, mainly with reference to Fig. 11. Note that parts common to the first embodiment will be designated by the same names and symbols.

[0154] The disc brake 10A of the second embodiment has a caliper 13A that is partially different from the caliper 13 of the first embodiment, and a cover part 14A that is partially different from the cover part 14 of the first embodiment.

[0155] The caliper 13A has a caliper body 51A that is partially different from the caliper body 51. The caliper body 51A has a reaction portion 57A that is partially different from the reaction portion 57. The reaction portion 57A has a recess portion 81Aa that is partially different from the recess portion 81a and a recess portion 81Ab that is partially different from the recess portion 81b. The reaction portion 57A has an inner claw portion 62A (claw portion) that is partially different from the inner claw portion 62.

[0156] The recess portion 81Aa on the outlet side has an inner surface 91A that is partially different from the inner surface 91. The inner surface 91A differs from the inner surface 91 of the recess portion 81a of the first embodiment in that in addition to the concave surface portion 96 on the outlet side and the locking groove 101 on the outlet side, the inner surface 91A also has a concave surface portion 96 and a locking groove 101 on the inlet side. The inner claw portion 62A differs from the inner claw portion 62 in that the concave surface portion 96 and the locking groove 101 are provided on the recess portion 81Aa side. In the caliper body 51A, the locking groove 101 is formed in both the outer claw portion 61a and the inner claw portion 62A that form one recess portion 81Aa on the outlet side.

[0157] In the outlet-side recess 81Aa, the main surface 92A is different from the main surface 92 of the outlet-side recess 81a of the first embodiment in that, in addition to the outlet-side concave surface 96 and the outlet-side locking groove 101, the main surface 92A is also provided with a concave surface 96 and a locking groove 101 on the inlet side. In the outlet-side recess 81Aa, the inner surface 94A is different from the inner surface 94 of the outlet-side recess 81a of the first embodiment in that it is provided with a concave surface 96 on the inlet side and a locking groove 101 on the inlet side. The inner claw 62A is different from the inner claw 62 of the first embodiment in that it is provided with a concave surface 96 and a locking groove 101 on the recess 81Aa side.

[0158] In the outlet-side recess 81Aa, the inlet-side concave surface 96 is mirror-symmetrical to the outlet-side concave surface 96 with respect to a plane that is parallel to the radial reference plane and includes the central axis of the main surface 92A. In the outlet-side recess 81Aa, the inlet-side locking groove 101 is mirror-symmetrical to the outlet-side locking groove 101 with respect to a plane that is parallel to the radial reference plane and includes the central axis of the main surface 92A.

[0159] The recess portion 81Ab on the turn-in side has an inner surface 91A that is partially different from the inner surface 91. The inner surface 91A differs from the inner surface 91 of the recess portion 81b of the first embodiment in that in addition to the concave surface portion 96 on the turn-in side and the locking groove 101 on the turn-in side, the inner surface 91A also has a concave surface portion 96 and a locking groove 101 on the turn-out side. The inner claw portion 62A differs from the inner claw portion 62 in that the concave surface portion 96 and the locking groove 101 are provided on the recess portion 81Ab side. In the caliper body 51A, the locking groove 101 is formed in both the outer claw portion 61b and the inner claw portion 62A that form one recess portion 81Ab on the turn-in side.

[0160] In the turn-in side recess 81Ab, the main surface 92A is different from the main surface 92 of the turn-in side recess 81b of the first embodiment in that in addition to the turn-in side concave surface 96 and the turn-in side locking groove 101, the main surface 92A is also provided with a concave surface 96 and a locking groove 101 on the turn-out side. In the turn-in side recess 81Ab, the inner surface 94A is different from the inner surface 94 of the turn-in side recess 81b of the first embodiment in that it is provided with the concave surface 96 and the locking groove 101 on the turn-out side. The inner claw 62A is different from the inner claw 62 of the first embodiment in that it is provided with the concave surface 96 and the locking groove 101 on the recess 81Ab side.

[0161] In the recess 81Ab on the rotation side, the concave surface 96 on the rotation side is mirror-symmetrical to the concave surface 96 on the rotation side, with respect to a plane that is parallel to the radial reference plane and includes the central axis of the main surface 92A. In the recess 81Ab on the rotation side, the locking groove 101 on the rotation side is mirror-symmetrical to the locking groove 101 on the rotation side, with respect to a plane that is parallel to the radial reference plane and includes the central axis of the main surface 92A.

[0162] The cover part 14A has a cover member 111A that is partially different from the cover member 111. The cover member 111A has a protrusion 124a similar to the protrusion 124a on the disc outlet side, instead of the protrusion 124b on the disc inlet side. That is, the cover member 111A has a pair of protrusions 124a that are similar in shape and orientation. The pair of protrusions 124a are mirror symmetrical.

[0163] The cover part 14A has a pair of locking members 112A that are partially different from the pair of locking members 112. The locking members 112A are also integrally molded parts formed by press molding from spring steel plate. The pair of locking members 112A have the same shape. The locking member 112A differs from the locking member 112 in that it has, in addition to one extending plate portion 163 extending radially outward from the base plate portion 160, one inner bent locking piece 164, one inner bent locking piece 165 and one outer bent locking piece 166 all extending from the side opposite the base plate portion 160 of the one extending plate portion 163, another extending plate portion 163 extending from the base plate portion 160 in the opposite direction from the one extending plate portion 163, and another inner bent locking piece 164, another inner bent locking piece 165 and another outer bent locking piece 166 all extending from the side opposite the base plate portion 163 of the other extending plate portion 163.

[0164] In locking member 112A, one extending plate portion 163 and the other extending plate portion 163 are mirror-symmetrical, one inner bent locking piece 164 and the other inner bent locking piece 164 are mirror-symmetrical, one outer bent locking piece 166 and the other outer bent locking piece 166 are mirror-symmetrical, and one inner bent locking piece 165 and the other inner bent locking piece 165 are mirror-symmetrical. Thus, locking member 112A is mirror-symmetrical.

[0165] In the locking member 112A, the inner bent locking piece 164, 165 and the outer bent locking piece 166 extending from the first side extending plate portion 163, which is one of the pair of extending plate portions 163, which is the inner bent locking piece 164 on the opposite side of the protruding plate portion 167, and the inner bent locking piece 164, 165 and the outer bent locking piece 166 extending from the second side extending plate portion 163, which is the other of the pair of extending plate portions 163, which is the inner bent locking piece 165 on the protruding plate portion 167 side, have a shape that is point-symmetrical with respect to the fixed central axis.

[0166] The inner bent locking piece 165 on the side of the protruding plate portion 167 of the inner bent locking pieces 164, 165 and the outer bent locking piece 166 extending from the first side extending plate portion 163, and the inner bent locking piece 164 on the opposite side of the protruding plate portion 167 of the inner bent locking pieces 164, 165 and the outer bent locking piece 166 extending from the second side extending plate portion 163, have a shape that is point-symmetrical with respect to the fixed central axis.

[0167] The outer bent locking piece 166 extending from the first side extending plate portion 163 and the outer bent locking piece 166 extending from the second side extending plate portion 163 are shaped to be point symmetrical with respect to the fixed central axis.

[0168] Therefore, the inner bent locking pieces 164, 165 and the outer bent locking piece 166 extending from the first side extending plate portion 163 and the inner bent locking pieces 164, 165 and the outer bent locking piece 166 extending from the second side extending plate portion 163 are shaped point-symmetrically with respect to the fixed portion 162.

[0169] One locking member 112A is fitted and fixed to one protrusion 124a of the cover member 111A, and another locking member 112A is fitted and fixed to the other protrusion 124a, thereby forming a cover part 14A.

[0170] Specifically, similar to the locking member 112 of the first embodiment, one locking member 112A is fitted onto one protruding portion 124a while elastically deforming the three fixing pieces 175 of the fixing portion 162 until the base plate portion 160 and the pair of extending plate portions 163 abut against the main plate portion 121. As a result, this one locking member 112A is fixed to the cover member 111A with the base plate portion 160 and the pair of extending plate portions 163 abutting against the main plate portion 121. In this state, this one locking member 112A orients the protruding plate portion 167 in the direction opposite to the long side edge 132 of the cover member 111A.

[0171] Similarly to the first locking member 112A, the other locking member 112A is fitted onto the other protruding portion 124a while elastically deforming the three fixing pieces 175 of the fixing portion 162 until the base plate 160 and the pair of extending plate portions 163 abut against the main plate portion 121. This causes the other locking member 112A to be fixed to the cover member 111A with the base plate 160 and the pair of extending plate portions 163 abutting against the main plate portion 121. In this state, the other locking member 112A orients the protruding plate portion 167 in the direction opposite to the long side edge 132 of the cover member 111A.

[0172] In this manner, the pair of locking members 112A are fixed to the cover member 111A to form the cover part 14A. In this state, two locking members 112A are arranged along the longitudinal direction of the cover member 111A. Each of the pair of locking members 112A is fixed to the cover member 111A at a fixing portion 162. Furthermore, each of the pair of locking members 112A has inner bent locking pieces 164, 165 and outer bent locking pieces 166 that face outward and inward in the longitudinal direction of the cover member 111A. Furthermore, each of the pair of locking members 112A has its pair of inner bent locking pieces 164, 165, and pair of outer bent locking pieces 166 that extend from the main plate portion 121 of the cover member 111A on the same side as the pair of protrusions 124a, 124a. Furthermore, when the cover member 111A is positioned so that the long edge portion 132 is at the bottom, the fixed portion 162 fixed to the protrusion 124a on the outlet side and the fixed portion 162 fixed to the protrusion 124a on the inlet side have the same shape on the top and bottom.

[0173] Then, this cover part 14A is assembled to the bridge part 56 and the reaction part 57A of the caliper body 51. At this time, the cover part 14A is assembled to the bridge part 56 and the reaction part 57A from the side opposite to the cylinder part 55 (see FIG. 3) in the disk axial direction.

[0174] When assembled to the bridge portion 56 and the reaction portion 57A, the cover part 14A is positioned so that the pair of locking members 112A is at the front and the main plate portion 121 of the cover part 111A is at the rear, and is fitted into the pair of recess portions 81a, 81b in the pair of locking members 112A.

[0175] Then, the rotation-side locking member 112A fitted into the rotation-side protrusion 124a has the rotation-side inner bent locking pieces 164, 165 and the rotation-side outer bent locking piece 166 each riding up onto the rotation-side of the rotation-side recess portion 81Aa, i.e., the concave surface portion 96 on the outer side in the circumferential direction of the disk, in the same manner as in the first embodiment, and then engages with the locking groove 101 on the outer side in the circumferential direction of the disk of the rotation-side recess portion 81Aa. At the same time, the retaining member 112A on the outlet side fitted into the protrusion 124a on the outlet side has the inner bent retaining pieces 164, 165 on the inlet side and the outer bent retaining piece 166 on the inlet side each riding up onto the inlet side of the recess 81Aa on the outlet side, i.e., the concave surface portion 96 on the inner side in the circumferential direction of the disk, in the same manner as on the outlet side, and then engaging with the retaining groove 101 on the inlet side of the recess 81Aa on the outlet side, i.e., the inner side in the circumferential direction of the disk.

[0176] In parallel with the above, the locking member 112A on the rotation side engaged with the protrusion 124a on the rotation side has the inner bent locking pieces 164, 165 on the rotation side and the outer bent locking piece 166 on the rotation side each ride up onto the rotation side of the recess portion 81Ab on the rotation side, i.e., the concave surface portion 96 on the outer side in the circumferential direction of the disk, in the same manner as in the first embodiment, and then engage with the locking groove 101 on the outer side in the circumferential direction of the disk of the recess portion 81Ab on the rotation side. At the same time, the locking member 112A fitted into the protrusion 124a on the inlet side has the inner bent locking pieces 164, 165 on the outlet side and the outer bent locking piece 166 on the outlet side each riding up onto the outlet side of the recess portion 81Ab on the inlet side, i.e., the concave surface portion 96 on the inner side in the circumferential direction of the disk, in the same manner as on the inlet side, and then engaging with the locking groove 101 on the inner side in the circumferential direction of the disk of the recess portion 81Ab on the inlet side.

[0177] As a result, the cover member 111A is brought into pressure contact with the bridge portion 56 and the reaction portion 57A of the caliper 13 at the main plate portion 121, as in the first embodiment, and stops. In this manner, the cover part 14A is attached to the caliper 13A with the locking members 112A disposed in the respective recesses 81Aa, 81Ab of the caliper 13A.

[0178] In the cover part 14A assembled to the caliper 13A in the manner described above, the cover member 111A covers the pair of recesses 81Aa, 81Ab from the opposite side of the cylinder portion 55 (see FIG. 3) in the disk axial direction, i.e., from the outer side. In addition, in this assembled state, the pair of locking members 112A of the cover part 14A are arranged spaced apart in the disk circumferential direction, and elastically fix the cover member 111A to the caliper 13A.

[0179] In addition, in the assembled cover part 14A, the locking center axis on the outlet side of the locking member 112A on the outlet side coincides with the center axis of the locking groove 101 on the outlet side of the recess 81Aa on the outlet side. In addition, in the assembled cover part 14A, the locking center axis on the inlet side of the locking member 112 on the outlet side coincides with the center axis of the locking groove 101 on the inlet side of the recess 81Aa on the outlet side. In addition, in the assembled cover part 14A, the locking center axis on the inlet side of the locking member 112 on the inlet side coincides with the center axis of the locking groove 101 on the inlet side of the recess 81Ab on the inlet side. In addition, in the assembled cover part 14A, the locking center axis on the outlet side of the locking member 112 on the inlet side coincides with the center axis of the locking groove 101 on the outlet side of the recess 81Aa on the inlet side.

[0180] Here, in the assembled cover part 14A, the elastic force of the pair of inner bent locking pieces 164 and the pair of inner bent locking pieces 165 of the locking member 112A on the outlet side generates a component in a direction that causes the main plate portion 121 to abut against the bridge portion 56 and the reaction portion 57. Similarly, in the assembled cover part 14A, the elastic force of the pair of inner bent locking pieces 164 and the pair of inner bent locking pieces 165 of the locking member 112A on the inlet side generates a component in a direction that causes the main plate portion 121 to abut against the bridge portion 56 and the reaction portion 57. As a result, in the assembled cover part 14A, the pair of locking members 112A fixed to the cover member 111A by the fixing portions 162 each elastically abut the main plate portion 121 of the cover member 111A against the bridge portion 56 and the reaction portion 57A, in other words, locks them in a tight contact state. At this time, the main plate portion 121 mainly contacts the bridge portion 56 and the reaction portion 57A at a portion that is radially outward of the pair of protrusions 124a in the disk radial direction.

[0181] In addition, in the assembled cover part 14A, the pair of outer bent locking pieces 166 of the locking member 112A on the rotation side abut against the pair of locking grooves 101 of the recessed portion 81Aa of the reaction part 57A to restrict movement thereof in the direction away from the reaction part 57A in the opposite direction to the cylinder part 55 (see FIG. 3). In the assembled cover part 14A, the pair of outer bent locking pieces 166 of the locking member 112A on the rotation side abut against the pair of locking grooves 101 of the recessed portion 81Ab of the reaction part 57A to restrict movement thereof in the direction away from the reaction part 57A in the opposite direction to the cylinder part 55 (see FIG. 3).

[0182] In the assembled cover part 14A, the cover member 111A covers the two recessed portions 81Aa, 81Ab of the caliper 13A from the axial direction of the cylinder bore 71 (see FIG. 2). In the assembled cover part 14A, a pair of locking members 112A secure the cover member 111A to the caliper 13A. In the assembled cover part 14A, each of the pair of locking members 112A is secured to the cover member 111A at the securing portion 162.

[0183] Furthermore, the rotation-side locking member 112A of the assembled cover part 14A has a pair of inner bent locking pieces 164 and a pair of inner bent locking pieces 165 that extend from its fixed part 162 in the axial direction of the rotation-side cylinder hole 71 (see FIG. 2) that is aligned with the rotation-side locking member 112A in the disc circumferential direction, that is, inclined relative to the movement direction of the rotation-side piston 72 (see FIG. 2) provided in this cylinder hole 71, in this movement direction, so as to approach the rotation-side cylinder hole 71. The rotation-side locking member 112A of the assembled cover part 14A has each of the pair of inner bent locking pieces 164 and the pair of inner bent locking pieces 165 bent inward in the radial direction of the rotation-side cylinder hole 71. In the assembled cover part 14A, the pair of inner bent locking pieces 164 and the pair of inner bent locking pieces 165 of the locking member 112A on the rotation side abut against the locking grooves 101 of the recess portion 81Aa with which they are engaged, similar to the first embodiment.

[0184] The turn-in side locking member 112A of the assembled cover part 14A has a pair of inner bent locking pieces 164 and a pair of inner bent locking pieces 165 that extend from its fixed part 162 in the axial direction of the turn-in side cylinder hole 71 (see FIG. 2) that is aligned with the turn-in side locking member 112A in the disk circumferential direction, that is, inclined relative to the movement direction of the turn-in side piston 72 (see FIG. 2) provided in this cylinder hole 71, in this movement direction, so as to approach the turn-in side cylinder hole 71. The turn-in side locking member 112A of the assembled cover part 14A has each of the pair of inner bent locking pieces 164 and the pair of inner bent locking pieces 165 bent inward in the radial direction of the turn-in side cylinder hole 71. In the assembled cover part 14A, the pair of inner bent locking pieces 164 and the pair of inner bent locking pieces 165 of the locking member 112A on the insertion side abut against the locking grooves 101 of the recess portion 81Ab with which they are engaged, in the same manner as in the first embodiment.

[0185] Furthermore, the pair of inner bent locking pieces 164, the pair of inner bent locking pieces 165, and the pair of outer bent locking pieces 166 of the locking member 112A on the rotation side of the assembled cover part 14A are symmetrical, specifically, line-symmetrical, with respect to a line connecting the fixed central axis that is the center of the fixed part 162 and the arc centers of the pair of locking grooves 101 of the recess 81 a with which the locking member 112A is locked. The pair of inner bent locking pieces 164, the pair of inner bent locking pieces 165, and the pair of outer bent locking pieces 166 of the locking member 112A on the rotation side of the assembled cover part 14A are symmetrical, specifically, line-symmetrical, with respect to a line connecting the fixed central axis that is the center of the fixed part 162 and the arc centers of the pair of locking grooves 101 of the recess 81 b with which the locking member 112A is locked.

[0186] Furthermore, the rotation-side locking member 112A of the assembled cover part 14A has a pair of outer bent locking pieces 166 that extend from its fixed portion 162 in the axial direction of the rotation-side cylinder bore 71 (see FIG. 2) that is aligned with the rotation-side locking member 112A in the disk circumferential direction, i.e., at an angle relative to the movement direction of the rotation-side piston 72 (see FIG. 2) provided in the cylinder bore 71, so as to approach the rotation-side cylinder bore 71 in this movement direction. The rotation-side locking member 112A of the assembled cover part 14A has each of the pair of outer bent locking pieces 166 bent outward in the radial direction of the rotation-side cylinder bore 71. The rotation-side locking member 112A of the assembled cover part 14A has each of the pair of outer bent locking pieces 166 that abut against the pair of locking grooves 101 of the recess portion 81Aa with which it is to be engaged, as in the first embodiment.

[0187] The turn-in side locking member 112A of the assembled cover part 14A has a pair of outer bent locking pieces 166 that extend from its fixed portion 162 in the axial direction of the turn-in side cylinder bore 71 (see FIG. 2) that is aligned with the turn-in side locking member 112A in the disk circumferential direction, that is, inclined relative to the movement direction of the turn-in side piston 72 (see FIG. 2) provided in the cylinder bore 71, so as to approach the turn-in side cylinder bore 71 in this movement direction. The turn-in side locking member 112A of the assembled cover part 14A has each of the pair of outer bent locking pieces 166 bent outward in the radial direction of the turn-in side cylinder bore 71. The turn-in side locking member 112A of the assembled cover part 14A has each of the pair of outer bent locking pieces 166 that abut against the pair of locking grooves 101 of the recess portion 81Ab with which it is to be engaged, as in the first embodiment.

[0188] Furthermore, in the assembled cover part 14A, the line connecting the fixed central axis, which is the center of its fixed portion 162, and the protruding plate portion 167 of the locking member 112A on the rotation side is parallel to the radial reference line. In the assembled cover part 14A, the line connecting the fixed central axis, which is the center of its fixed portion 162, and the protruding plate portion 167 of the locking member 112A on the rotation side is parallel to the radial reference line. The protruding plate portion 167 of the locking member 112A on the rotation side of the assembled cover part 14A and the protruding plate portion 167 of the locking member 112A on the rotation side are oriented in the same direction as the extension of the radial reference line. In the assembled cover part 14A, the protruding plate portion 167 of the locking member 112A on the rotation side and the protruding plate portion 167 of the locking member 112A on the rotation side both face outward in the disc radial direction.

[0189] Furthermore, the cover member 111A of the cover part 14A in the assembled state has a pair of protrusions 124a, 124a that protrude from the main plate portion 121 in the axial direction of the cylinder bore 71 (see FIG. 2) so as to approach the cylinder bore 71. The locking member 112A on the outlet side of the cover part 14A in the assembled state has a plurality of guide locking pieces 171 on the center side of its fixed portion 162 that abut against the outer peripheral surface 150a of the corresponding protrusion 124a on the outlet side. The locking member 112A on the inlet side of the cover part 14A in the assembled state has a plurality of guide locking pieces 171 on the center side of its fixed portion 162 that abut against the outer peripheral surface 150a of the corresponding protrusion 124a on the inlet side.

[0190] In the assembled cover part 14A, the pair of inner bent locking pieces 164, the pair of inner bent locking pieces 165, and the pair of outer bent locking pieces 166 of the outlet-side locking member 112A extend from the fixed part 162 of the outlet-side locking member 112A in the axial direction of the outlet-side cylinder bore 71 (see FIG. 2), in other words, in a direction inclined with respect to the movement direction of the outlet-side piston 72 (see FIG. 2). In the assembled cover part 14A, the pair of inner bent locking pieces 164, the pair of inner bent locking pieces 165, and the pair of outer bent locking pieces 166 of the inlet-side locking member 112A extend from the fixed part 162 of the inlet-side locking member 112A in the axial direction of the inlet-side cylinder bore 71 (see FIG. 2), in other words, in a direction inclined with respect to the movement direction of the inlet-side piston 72 (see FIG. 2).

[0191] In the assembled state, the pair of inner bent locking pieces 164, the pair of inner bent locking pieces 165, and the pair of outer bent locking pieces 166 of the locking member 112A on the outlet side of the cover part 14A elastically abut against the inner surface 91A of the recess 81Aa with which they engage. In the assembled state, the pair of inner bent locking pieces 164, the pair of inner bent locking pieces 165, and the pair of outer bent locking pieces 166 of the locking member 112A on the outlet side of the cover part 14A are provided in the recess 81Aa. In the assembled state, the pair of inner bent locking pieces 164, the pair of inner bent locking pieces 165, and the pair of outer bent locking pieces 166 of the locking member 112A on the inlet side of the cover part 14A elastically abut against the inner surface 91A of the recess 81Ab with which they engage. In the assembled state, the cover part 14A has the pair of inner bent locking pieces 164, the pair of inner bent locking pieces 165, and the pair of outer bent locking pieces 166 of the locking member 112A on the turn-in side provided in the recess portion 81Ab. Therefore, in the caliper 13 with the cover part 14A assembled, the locking member 112A is disposed in each of the two recess portions 81Aa, 81Ab.

[0192] In the assembled state, the pair of inner bent locking pieces 164, the pair of inner bent locking pieces 165, and the pair of outer bent locking pieces 166 of the locking member 112A on the outlet side of the cover part 14A abut against the pair of locking grooves 101 of the recess portion 81Aa with which they engage. In the assembled state, the pair of inner bent locking pieces 164, the pair of inner bent locking pieces 165, and the pair of outer bent locking pieces 166 of the locking member 112A on the inlet side of the cover part 14A abut against the locking grooves 101 of the recess portion 81Ab with which they engage.

[0193] In addition, in the assembled cover part 14A, the cover member 111A abuts against the bridge portion 56 radially outward of the protrusions 124a, 124a to which the pair of locking members 112A are fixed.

[0194] In addition, in the assembled cover part 14A, the main plate portion 121 is mirror-symmetrical with respect to the radial reference plane.

[0195] Furthermore, the inner surface 91A of the recessed portion 81Aa on the outlet side of the caliper 13A, when the cover part 14A is assembled, has an arc-shaped locking groove 101 whose center is offset a predetermined distance toward the outlet side from the fixed central axis, which is the center of the fixed portion 162 of the locking member 112A on the outlet side, and whose arc diameter is smaller than the arc diameter of the main surface 92A of the inner surface 91A. Furthermore, the inner surface 91A of the recessed portion 81Aa on the outlet side of the caliper 13A, when the cover part 14A is assembled, has an arc-shaped locking groove 101 whose center is offset a predetermined distance toward the inlet side from the fixed central axis, which is the center of the fixed portion 162 of the locking member 112A on the outlet side, and whose arc diameter is smaller than the arc diameter of the main surface 92A of the inner surface 91A. The engaging member 112A on the rotation side of the cover part 14A in the assembled state has a plurality of engaging pieces consisting of a pair of inner bent engaging pieces 164, a pair of inner bent engaging pieces 165 and a pair of outer bent engaging pieces 166 which extend from the fixed part 162 in a direction inclined with respect to the movement direction of the rotation side piston 72 and abut with elastic force against a pair of engaging grooves 101 of the recess part 81Aa.

[0196] The inner surface 91A of the recess 81Ab on the turn-in side of the caliper 13A, when the cover part 14A is assembled, has an arc-shaped turn-in side locking groove 101 whose center is offset a predetermined distance toward the turn-in side from the fixed central axis, which is the center of the fixed part 162 of the turn-in side locking member 112A, and whose arc diameter is smaller than the arc diameter of the main surface 92A of the inner surface 91A. The inner surface 91A of the recess 81Ab on the turn-in side of the caliper 13A, when the cover part 14A is assembled, has an arc-shaped turn-in side locking groove 101 whose center is offset a predetermined distance toward the turn-in side from the fixed central axis, which is the center of the fixed part 162 of the turn-in side locking member 112A, and whose arc diameter is smaller than the arc diameter of the main surface 92A of the inner surface 91A. The locking member 112A on the rotation side of the cover part 14A in the assembled state has a plurality of locking pieces consisting of a pair of inner bent locking pieces 164, a pair of inner bent locking pieces 165, and a pair of outer bent locking pieces 166 that extend from the fixed part 162 in a direction inclined with respect to the movement direction of the rotation side piston 72 (see Figure 2) and abut with elastic force against a pair of locking grooves 101 of the recess part 81Ab.

[0197] In the assembled cover part 14A, in the locking member 112A on the outlet side, the inner bent locking pieces 164, 165 and the outer bent locking piece 166 that abut against the locking groove 101 on the outlet side, and the inner bent locking pieces 164, 165 and the outer bent locking piece 166 that abut against the locking groove 101 on the inlet side, are shaped point-symmetrically with respect to the fixed part 162. In the assembled cover part 14A, in the locking member 112A on the outlet side, the inner bent locking pieces 164, 165 and the outer bent locking piece 166 that abut against the locking groove 101 on the inlet side, and the inner bent locking pieces 164, 165 and the outer bent locking piece 166 that abut against the locking groove 101 on the outlet side, are shaped point-symmetrically with respect to the fixed part 162.

[0198] In the disc brake 10A and cover part 14A of the second embodiment, a cover member 111A covering the recessed portions 81Aa, 81Ab of the caliper 13A is locked in close contact with the caliper 13A by a locking member 112A fixed to the cover member 111A by a fixing part 162. Therefore, the disc brake 10A and cover part 14A have the same effects as the disc brake 10 and cover part 14 of the first embodiment.

[0199] In the disc brake 10A and the cover part 14A, two recesses 81Aa and 81Ab are provided in the caliper 13A, and a locking member 112A is disposed in each of the recesses 81Aa and 81Ab.

[0200] In the disc brake 10A and the cover part 14A, the inner surface 91A of the recess 81Aa on the rotation side of the caliper 13A has a pair of arc-shaped locking grooves 101 whose centers are offset by a predetermined distance to the rotation side and the rotation entry side from the fixed central axis, which is the center of the fixed portion 162 of the locking member 112A fixed to the rotation-side protrusion 124a, and whose arc diameter is smaller than the arc diameter of the main surface 92A of the inner surface 91A. As a result, the locking grooves 101 are formed in both the outer claw portion 61a and the inner claw portion 62A that form one recess 81Aa on the rotation side of the caliper body 51A.

[0201] Additionally, in the disc brake 10A and the cover part 14A, the inner surface 91A of the recess portion 81Ab on the rotation side of the caliper 13A has a pair of arc-shaped locking grooves 101 whose centers are positions offset a predetermined distance to the rotation side and the rotation outward from the fixed central axis, which is the center of the fixed portion 162 of the locking member 112A fixed to the rotation-side protrusion 124a, and whose arc diameter is smaller than the arc diameter of the main surface portion 92 of the inner surface 91. As a result, the locking grooves 101 are formed in both the outer claw portion 61b and the inner claw portion 62A that form one recess portion 81Ab on the rotation side of the caliper body 51A.

[0202] Therefore, in the disc brake 10A and the cover part 14A, the locking member 112A arranged in the recess 81Aa is locked to both the outer claw portion 61a and the inner claw portion 62A that form the recess 81Aa, and the locking member 112A arranged in the recess 81Ab is locked to both the outer claw portion 61b and the inner claw portion 62A that form the recess 81Ab. This allows the cover part 14A to be attached to the caliper 13A more firmly.

[0203] In addition, the disc brake 10A and the cover part 14A have a locking member 112A fixed to the protrusion 124a on the rotation side, which has inner bent locking pieces 164, 165 and an outer bent locking piece 166 that extend from the fixed part 162 in a direction inclined with respect to the direction of movement of the piston 72 (see Figure 2), and which elastically abut against the locking groove 101 on the rotation side, and inner bent locking pieces 164, 165 and an outer bent locking piece 166 that elastically abut against the locking groove 101 on the rotation side. Furthermore, in the locking member 112A on the outlet side, inner bent locking pieces 164, 165 and outer bent locking piece 166 that abut against the locking groove 101 on the outlet side are formed in a shape that is point-symmetrical with respect to the fixed portion 162, and inner bent locking pieces 164, 165 and outer bent locking piece 166 that abut against the locking groove 101 on the inlet side are formed.

[0204] In addition, the disc brake 10A and the cover part 14A have a locking member 112A fixed to the protrusion 124a on the rotation side, which has inner bent locking pieces 164, 165 and an outer bent locking piece 166 that extend from the fixed part 162 in a direction inclined with respect to the movement direction of the piston 72 (see Figure 2), and which elastically abut against the locking groove 101 on the rotation side, and inner bent locking pieces 164, 165 and an outer bent locking piece 166 that elastically abut against the locking groove 101 on the rotation side. Furthermore, in the locking member 112A on the inlet side, inner bent locking pieces 164, 165 and outer bent locking piece 166 that abut against the locking groove 101 on the inlet side are formed in a shape that is point-symmetrical with respect to the fixed portion 162, and inner bent locking pieces 164, 165 and outer bent locking piece 166 that abut against the locking groove 101 on the outlet side are formed.

[0205] Therefore, the supporting force of the locking member 112A acts on the caliper 13 from opposite directions, and the cover part 14A can be attached to the caliper 13A more firmly. Also, the two locking members 112A can be made into common parts with the same shape, which reduces costs.

[0206] [Third Embodiment] Next, a third embodiment of the present invention will be described with reference to Figures 12 to 14, focusing on differences from the second embodiment. Note that parts common to the second embodiment will be designated by the same names and symbols. Parts with similar configurations but different sizes will also be designated by the same names and symbols.

[0207] As shown in FIG. 12, the disc brake 10B of the third embodiment has a caliper 13B that is partially different from the caliper 13A of the second embodiment, and a cover part 14B that is partially different from the cover part 14A of the second embodiment.

[0208] The caliper 13B has a caliper body 51B that is partially different from the caliper body 51A. The caliper body 51B has a cylinder portion 55B that is partially different from the cylinder portion 55. Although not shown, the cylinder portion 55B has only one cylinder hole. The caliper 13B is a so-called one-pot caliper that has one cylinder hole. Therefore, the caliper 13B has only one piston 72. The cylinder hole and piston 72 are provided in the center of the caliper body 51B in the disk circumferential direction, along the disk axial direction.

[0209] As shown in FIG. 13, the caliper body 51B has a reaction portion 57B that is partially different from the reaction portion 57A. The reaction portion 57B has one recess 81Aa. The caliper body 51B does not have an inner claw 62, and two claws, a rotation-out side claw 61Ba and a rotation-in side claw 61Bb, form one recess 81Aa. The fixed central axis of the recess 81Aa, which is the center of the main surface portion 92A, is located within the radial reference plane.

[0210] As described in the second embodiment, the recess 81Aa has an inner surface 91A that is provided with a concave surface 96 and a locking groove 101 on the rotation-in side in addition to the concave surface 96 on the rotation-out side and the locking groove 101 on the rotation-out side. In the caliper body 51B, the locking groove 101 is formed in both the claws 61Ba and 61Bb that form one recess 81Aa.

[0211] 14, the cover part 14B has a cover member 111B that is partially different from the cover member 111. The cover member 111B has a protrusion 124a formed in only one location at the center of the main plate portion 121 in the longitudinal direction.

[0212] The cover part 14B has one locking member 112A.

[0213] As in the second embodiment, the locking member 112A is fitted and fixed to the protrusion 124a of the cover member 111B, thereby forming the cover part 14B.

[0214] Specifically, the locking member 112A is press-fit into the protruding portion 124a while elastically deforming the three fixing pieces 175 of the fixing portion 162 until the base plate portion 160 and the pair of extending plate portions 163 abut against the main plate portion 121. As a result, the locking member 112A is fixed to the cover member 111B with the base plate portion 160 and the pair of extending plate portions 163 abutting against the main plate portion 121. In this state, the locking member 112A orients the protruding plate portion 167 in the direction of the long side edge 131 of the cover member 111B.

[0215] In this way, one locking member 112A is fixed to the cover member 111B to form the cover part 14B. In this state, the locking member 112A is fixed to the cover member 111B at the fixing portion 162. The locking member 112A has inner bent locking pieces 164, 165 and outer bent locking piece 166 that extend outward on both sides in the longitudinal direction of the cover member 111B. The locking member 112A has a pair of inner bent locking pieces 164, a pair of inner bent locking pieces 165, and a pair of outer bent locking pieces 166 that extend from the main plate portion 121 of the cover member 111B on the same side as the protrusion 124a.

[0216] The cover part 14B is then attached to the bridge part 56 and the reaction part 57B of the caliper body 51B from the side opposite to the cylinder part 55B shown in FIG.

[0217] When assembled to the bridge portion 56 and the reaction portion 57B, the cover part 14B is oriented with the locking member 112A at the front and the main plate portion 121 of the cover member 111B at the rear, and is fitted into the recess portion 81Aa in the locking member 112A.

[0218] Then, in the same manner as in the second embodiment, the inner bent locking pieces 164, 165 on the outlet side and the outer bent locking piece 166 on the outlet side of the locking member 112A ride up onto the concave surface portion 96 on the outlet side, and then engage with the locking groove 101 on the outlet side. At the same time, the inner bent locking pieces 164, 165 on the inlet side and the outer bent locking piece 166 on the outlet side of the locking member 112A ride up onto the concave surface portion 96 on the inlet side, and then engage with the locking groove 101 on the inlet side.

[0219] As a result, the cover member 111B is brought into pressure contact with the bridge portion 56 and the reaction portion 57B of the caliper 13B at the main plate portion 121, as in the second embodiment, and stops. In this manner, the cover part 14A is attached to the caliper 13B with the locking member 112A disposed in the recess portion 81Aa of the caliper 13B.

[0220] In the cover part 14B assembled to the caliper 13B in the manner described above, the cover member 111B covers the recessed portion 81Aa from the opposite side of the cylinder portion 55B in the disk axial direction, i.e., from the outer side. In this assembled state, the locking member 112A of the cover part 14B elastically fixes the cover member 111B to the caliper 13B.

[0221] In the assembled cover part 14B, the central locking axis of the locking member 112A on the outlet side coincides with the central axis of the locking groove 101 on the outlet side of the recess 81Aa. In the assembled cover part 14B, the central locking axis of the locking member 112A on the inlet side coincides with the central axis of the locking groove 101 on the inlet side of the recess 81Aa.

[0222] Here, in the assembled cover part 14B, the elastic force of the pair of inner bent locking pieces 164 and the pair of inner bent locking pieces 165 of the locking member 112A generates a component in a direction that causes the main plate portion 121 to abut against the bridge portion 56 and the reaction portion 57B. As a result, in the assembled cover part 14B, the locking member 112A fixed to the cover member 111B by the fixing portion 162 elastically abuts the main plate portion 121 of the cover member 111B against the bridge portion 56 and the reaction portion 57B, in other words, locks them in a tight contact state. At this time, the portion of the main plate portion 121 that is mainly radially outward of the protrusion 124a abuts against the bridge portion 56 and the reaction portion 57B.

[0223] In addition, in the assembled state, the cover part 14B restricts the movement of a pair of outer bent locking pieces 166 of the locking member 112A in the direction away from the reaction part 57B in the opposite direction to the cylinder part 55 by abutting against a pair of locking grooves 101 in the recess part 81Aa of the reaction part 57B.

[0224] In the assembled cover part 14B, the cover member 111B covers the recess portion 81Aa of the caliper 13B from the axial direction of the piston 72. In the assembled cover part 14B, the locking member 112A fixes the cover member 111B to the caliper 13B. In the assembled cover part 14B, the locking member 112A is fixed to the cover member 111B at the fixing portion 162.

[0225] Furthermore, the locking member 112A of the cover part 14B in the assembled state has a pair of inner bent locking pieces 164 and a pair of inner bent locking pieces 165 that extend from its fixed portion 162 in the axial direction of the piston 72 where the locking member 112A is positioned circumferentially with respect to the disk, i.e., the movement direction of the piston 72, while tilting toward the piston 72 in this movement direction. The locking member 112A of the cover part 14B in the assembled state has each of the pair of inner bent locking pieces 164 and the pair of inner bent locking pieces 165 bent inward in the radial direction of the piston 72. The locking member 112A of the cover part 14B in the assembled state has each of the pair of inner bent locking pieces 164 and the pair of inner bent locking pieces 165 that abut against the locking grooves 101 of the recess portion 81Aa with which they are to be engaged, as in the second embodiment.

[0226] Furthermore, the locking member 112A of the assembled cover part 14B has a pair of inner bent locking pieces 164, a pair of inner bent locking pieces 165 and a pair of outer bent locking pieces 166 that are symmetrical, specifically, linearly symmetrical, with respect to a line connecting the fixed central axis that is the center of the fixed portion 162 and the arc center of the pair of locking grooves 101 of the recess portion 81Aa to which this locking member 112A is locked.

[0227] Furthermore, the locking member 112A of the cover part 14B in the assembled state has a pair of outer bent locking pieces 166 that extend from the fixed portion 162 in the axial direction of the piston 72, where the locking member 112A is positioned circumferentially with respect to the disk, i.e., the movement direction, while inclining toward the piston 72 in this movement direction. The locking member 112A of the cover part 14B in the assembled state has each of the pair of outer bent locking pieces 166 bent outward in the radial direction of the piston 72. The locking member 112A of the cover part 14B in the assembled state has each of the pair of outer bent locking pieces 166 abut against the pair of locking grooves 101 of the recess portion 81Aa, as in the second embodiment.

[0228] In addition, the locking member 112A of the cover part 14A in the assembled state has a line connecting the fixed central axis, which is the center of the fixed part 162, and the protruding plate part 167 parallel to the radial reference line. The protruding plate part 167 of the locking member 112A of the cover part 14A in the assembled state faces outward in the disk radial direction.

[0229] Additionally, the cover member 111B of the cover part 14B in the assembled state has a protruding portion 124a that protrudes from the main plate portion 121 in the axial direction of the piston 72 so as to approach the piston 72. The locking member 112A of the cover part 14B in the assembled state has a plurality of guide locking pieces 171 on the central side of the fixing portion 162 that abut against the outer peripheral surface 150a of the protruding portion 124a.

[0230] In addition, in the assembled cover part 14B, a pair of inner bent locking pieces 164, a pair of inner bent locking pieces 165, and a pair of outer bent locking pieces 166 of the locking member 112A extend from the fixed portion 162 of the locking member 112A in the axial direction of the piston 72, i.e., in a direction inclined relative to the direction of movement.

[0231] In addition, in the assembled state, the pair of inner bent locking pieces 164, the pair of inner bent locking pieces 165, and the pair of outer bent locking pieces 166 of the locking member 112A of the cover part 14B elastically abut against the inner surface 91A of the recess 81Aa. In the assembled state, the pair of inner bent locking pieces 164, the pair of inner bent locking pieces 165, and the pair of outer bent locking pieces 166 of the locking member 112A are provided in the recess 81Aa of the cover part 14B. Therefore, in the caliper 13B with the cover part 14B assembled, the locking member 112A is disposed in the recess 81Aa.

[0232] In the assembled state, the pair of inner bent locking pieces 164, the pair of inner bent locking pieces 165 and the pair of outer bent locking pieces 166 of the locking member 112A of the cover part 14B abut against the pair of locking grooves 101 of the recess portion 81Aa.

[0233] In addition, in the assembled cover part 14B, the cover member 111A abuts against the bridge portion 56 radially outward of the protrusion 124a to which the locking member 112A is fixed.

[0234] In addition, in the assembled cover part 14B, the main plate portion 121 is mirror-symmetrical with respect to the radial reference plane.

[0235] Furthermore, the inner surface 91A of the recessed portion 81Aa of the caliper 13B in an assembled state with the cover part 14B has an arc-shaped locking groove 101 centered at a position offset a predetermined distance toward the rotation-outward side from the fixed central axis, which is the center of the fixed portion 162 of the locking member 112A, and formed with an arc diameter smaller than the arc diameter of the main surface portion 92A of the inner surface 91A. Furthermore, the inner surface 91A of the recessed portion 81Aa of the caliper 13B in an assembled state with the cover part 14B has an arc-shaped locking groove 101 centered at a position offset a predetermined distance toward the rotation-inward side from the fixed central axis, which is the center of the fixed portion 162 of the locking member 112A, and formed with an arc diameter smaller than the arc diameter of the main surface portion 92A of the inner surface 91A. The locking member 112A of the assembled cover part 14B has a plurality of locking pieces, consisting of a pair of inner bent locking pieces 164, a pair of inner bent locking pieces 165, and a pair of outer bent locking pieces 166, which extend from the fixed portion 162 in a direction inclined with respect to the movement direction of the piston 72 and abut with elastic force against a pair of locking grooves 101 of the recess portion 81Aa.

[0236] In addition, in the assembled cover part 14B, the inner bent locking pieces 164, 165 and the outer bent locking piece 166 that abut against the locking groove 101 on the outlet side of the locking member 112A, and the inner bent locking pieces 164, 165 and the outer bent locking piece 166 that abut against the locking groove 101 on the inlet side, are shaped point-symmetrically with respect to the fixed part 162.

[0237] In the disc brake 10B and cover part 14B of the third embodiment, a cover member 111B covering the recess portion 81Aa of the caliper 13B is locked in a state in which the locking member 112A, which is fixed to the cover member 111B by a fixing portion 162, is in close contact with the caliper 13B. Therefore, the disc brake 10B and cover part 14B have the same effects as the disc brake 10A and cover part 14A of the second embodiment.

[0238] In the disc brake 10B and the cover part 14B, the inner surface 91A of the recessed portion 81Aa of the caliper 13B has a pair of arc-shaped locking grooves 101 whose centers are offset a predetermined distance to the rotation-outgoing side and the rotation-in side from the fixed central axis, which is the center of the fixed portion 162 of the locking member 112A fixed to the protrusion 124a, and whose arc diameter is smaller than the arc diameter of the main surface portion 92A of the inner surface 91A. This makes it possible to suppress rotation of the cover part 14B.

[0239] Additionally, in the disc brake 10B and the cover part 14B, the locking member 112A fixed to the protruding portion 124a has inner bent locking pieces 164, 165 and outer bent locking piece 166 that extend from the fixed portion 162 in a direction inclined with respect to the direction of movement of the piston 72 and that elastically abut against the locking groove 101 on the outlet side, and the inner bent locking pieces 164, 165 and outer bent locking piece 166 that elastically abut against the locking groove 101 on the inlet side. Moreover, in the locking member 112A, the inner bent locking pieces 164, 165 and outer bent locking piece 166 that abut against the locking groove 101 on the outlet side, and the inner bent locking pieces 164, 165 and outer bent locking piece 166 that abut against the locking groove 101 on the inlet side are formed in shapes that are point-symmetrical with respect to the fixed portion 162.

[0240] Therefore, the disc brake 10B and the cover part 14B have a simple structure, and the cover part 14B can be attached to the caliper 13B more firmly.

[0241] According to the above-described aspects, it is possible to provide a disc brake and a cover part that can be firmly attached to a caliper with a simple structure, and thus the industrial applicability is great.

[0242] 10, 10A, 10B...Disc brake, 11...Disc, 12...Mounting member, 13, 13A, 13B...Caliper, 14, 14A, 14B...Cover parts, 17, 18...Brake pads, 55...Cylinder portion, 56...Bridge portion, 61a, 61b...Outer claw portion (claw portion), 61Ba, 61Bb...Claw portion, 62, 62A...Inner claw portion (claw portion), 71...Cylinder Hole, 72...piston, 81a, 81b, 81Aa, 81Ab...recess portion, 82...opening, 91, 91A, 91B...inner surface, 101...locking groove, 111, 111A, 111B...cover member, 112, 112A...locking member, 162...fixing portion, inner bent locking piece...164 (locking piece), inner bent locking piece...165 (locking piece), outer bent locking piece...166 (locking piece).

Claims

1. A disc brake for braking a vehicle having a disc that rotates together with a wheel, comprising: a mounting member attached to a non-rotating portion of the vehicle; a pair of brake pads; a caliper movably mounted on the mounting member and pressing the pair of brake pads against the disc; a cover member covering a recessed portion of the caliper; and a locking member fixed to the cover member by a fixing portion and locking the cover member in a state of close contact with the caliper, wherein the caliper comprises: a cylinder portion having a cylinder hole in which a piston that moves one of the pair of brake pads is disposed; a bridge portion extending from the cylinder portion across the outer peripheral surface of the disc; a plurality of claw portions formed on the extending tip side of the bridge portion and disposed opposite to the cylinder portion; and the recess portion provided between the plurality of claw portions, having an opening at the radially inner end of the disc, and formed opposite to the cylinder hole, a disc brake in which the inner surface of the recessed portion has an arc-shaped locking groove whose center is offset from the center of the fixed portion toward the outflow side or the inflow side and whose arc diameter is smaller than the arc diameter of the inner surface, and the locking member has a plurality of locking pieces that extend from the fixed portion in a direction inclined with respect to the moving direction of the piston and abut against the locking groove with elastic force.

2. A disc brake as set forth in claim 1, wherein the caliper is provided with two recesses, each recess is provided with a locking member, and the locking groove is provided on the rotation-in side of one recess and on the rotation-out side of the other recess.

3. The disc brake according to claim 2, wherein the fixing portions of the two locking members each have an odd-numbered polygonal shape and are upside-down shaped.

4. A disc brake as set forth in claim 1, wherein the locking groove is formed in both of the plurality of claws that form one of the recesses, and the locking piece that abuts against the locking groove has a shape that is point-symmetrical with respect to the fixed portion.

5. The disc brake according to claim 1, wherein the locking piece is shaped symmetrically with respect to a line connecting the center of the fixed portion and the center of the arc of the locking groove.

6. A cover component to be assembled to a disc brake comprising: a mounting member attached to a non-rotating portion of a vehicle having a disc that rotates together with the wheel; a pair of brake pads; and a caliper movably mounted on the mounting member and pressing the pair of brake pads against the disc, wherein the caliper comprises: a cylinder portion having a cylinder hole in which a piston that moves one of the pair of brake pads is disposed; a bridge portion extending from the cylinder portion across the outer circumferential surface of the disc; a plurality of claw portions formed on the extending tip side of the bridge portion and disposed opposite to the cylinder portion; and a recess portion disposed between the plurality of claw portions, having an opening at an inner end in the radial direction of the disc, and formed opposite to the cylinder hole, wherein the cover component comprises: a cover member that covers the recess portion of the caliper; and a locking member fixed to the cover member by a fixing portion and locking the cover member to the caliper, A cover component having an arc-shaped locking groove on the inner surface of the recess portion, the center of which is offset from the center of the fixed portion toward the outflow side or the inflow side and has an arc diameter smaller than the arc diameter of the inner surface, and the locking member extending from the fixed portion in a direction inclined with respect to the movement direction of the piston and having a plurality of locking pieces that elastically abut against the locking groove.

7. The cover part according to claim 6, wherein two of the locking members are arranged along the longitudinal direction of the cover member, and the locking pieces of each of the locking members are provided facing outward in the longitudinal direction of the cover member.

8. The cover part according to claim 7, wherein the fixing portions of the two locking members each have an odd-numbered polygonal shape and each fixing portion has an upside-down shape.

9. A cover part according to claim 6, wherein the locking grooves are formed in both the outer and inner claw portions of the claw portion, and the locking pieces are shaped point-symmetrically with respect to the fixing portion.

10. The cover part according to claim 6, wherein the locking piece has a symmetrical shape with respect to a line connecting the center of the fixing part and the center of the arc of the locking groove.

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