Disc brake

Abstract

A disc brake is provided with a caliper (13) which is movably provided to an attachment member and which presses a brake pad (18) against a brake disc. The brake caliper (13) is provided with: a plurality of claw parts (71) disposed so as to face the cylinder part (55); and recesses (81) that are provided between the plurality of claw sections (71), have openings (82) at the inner ends in the radial direction with respect to the rotational axis of the brake disc, and are formed so as to face the cylinder holes (61) of the cylinder sections (55), and cover member fixing holes (98) are formed on the inner peripheries of the recesses (81) so as to be inclined in the radial direction with respect to the rotational axis of the brake disc.

Description

Technical Field

[0001] The present invention relates to a disc brake.

[0002] This application claims priority based on Japanese Patent Application No. 2023-032660 filed in Japan on March 3, 2023, the contents of which are incorporated herein by reference. Background Art

[0003] There is known a disc brake in which a cover member is attached to a portion of a brake caliper that is visible when viewed from the outside of the vehicle (for example, see Patent Document 1).

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: U.S. Patent Application Publication No. 2019 / 0063522 Summary of the Invention

[0007] Technical problem to be solved by the invention

[0008] It is desirable to suppress removal of a cover member from a disc brake mounted on a vehicle.

[0009] The present invention provides a disc brake capable of suppressing removal of a cover member while the disc brake is mounted on a vehicle.

[0010] Technical solutions to technical problems

[0011] According to a first aspect of the present invention, a disc brake for braking a vehicle having a brake disc that rotates together with a wheel includes a mounting member mounted on a non-rotating portion of the vehicle, a brake caliper, and a cover member.

[0012] The brake caliper is movably mounted on the mounting component to press a pair of brake pads against the brake disc. The brake caliper comprises a cylinder portion, a bridge portion, a plurality of claw portions, and a recessed portion. The cylinder portion has a cylinder hole, in which a piston for moving one of the pair of brake pads is arranged. The bridge portion extends from the cylinder portion across the outer peripheral surface of the brake disc. A plurality of claw portions are formed on the extended front end side of the bridge portion and are arranged opposite to the cylinder portion. The recessed portion is arranged between the plurality of claw portions, and has an opening portion at the inner end in a radial direction relative to the axis of rotation of the brake disc, and is formed opposite to the cylinder hole. A hole for fixing the cover component is formed on the inner periphery of the recessed portion at an inclination relative to the radial direction.

[0013] The cover member is fixed to the brake caliper by a fixing member engaged with the cover member fixing hole, and covers the recessed portion in the direction of the rotation axis.

[0014] According to a second aspect of the present invention, a disc brake for braking a vehicle having a brake disc that rotates together with a wheel includes a mounting member mounted on a non-rotating portion of the vehicle, a caliper, and a cover member.

[0015] The brake caliper is movably mounted on the mounting component to press a pair of brake pads against the brake disc. The brake caliper comprises a cylinder portion, a bridge portion, a plurality of claw portions, and a recessed portion. The cylinder portion has a cylinder hole, in which a piston for moving one of the pair of brake pads is arranged. The bridge portion extends from the cylinder portion across the outer peripheral surface of the brake disc. A plurality of claw portions are formed on the extended front end side of the bridge portion and are arranged opposite to the cylinder portion. The recessed portion is provided between the plurality of claw portions, has an opening portion at the radial inner end relative to the rotation axis of the brake disc, and is formed opposite to the cylinder hole. A hole for fixing the cover component is provided on the inner periphery of the recessed portion.

[0016] The cover component is fixed to the brake caliper via a fixing member that engages with the cover component fixing hole, covering the recessed portion in the direction of the rotation axis. The cover component includes a first cover portion and a second cover portion. The first cover portion extends in the radial direction. The second cover portion is connected to the first cover portion and extends in the direction of the rotation axis toward the closer of the pair of brake pads. The second cover portion covers the cover component fixing hole when viewed in the radial direction.

[0017] Effects of the Invention

[0018] According to the above-described disc brake, it is possible to suppress detachment of the cover member from the disc brake mounted on the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view showing the disc brake and the brake disc according to the first embodiment.

[0020] Figure 2 This is a perspective view of the disc brake and the brake disc according to the first embodiment as viewed from the radially inner side of the brake disc.

[0021] Figure 3 This is a diagram of the disc brake according to the first embodiment as viewed from the inner side in the radial direction of the brake disc.

[0022] Figure 4 This is a perspective view of the disc brake according to the first embodiment as viewed from the radially inner side of the brake disc.

[0023] Figure 5 It is a front view showing the caliper main body of the disc brake according to the first embodiment.

[0024] Figure 6 This is a perspective view of the caliper main body of the disc brake according to the first embodiment as viewed from the radially inner side of the brake disc.

[0025] Figure 7 This is an exploded perspective view of the caliper body and the cover member of the disc brake according to the first embodiment, as viewed from the inner side in the radial direction of the brake disc.

[0026] Figure 8 It is an exploded side sectional view showing a caliper body, a cover member, and a fixing member of the disc brake according to the first embodiment.

[0027] Figure 9 This is a perspective view showing the cover member of the disc brake according to the first embodiment, as viewed from the back side.

[0028] Figure 10 This is a perspective view showing the cover member of the disc brake according to the first embodiment, as seen from the front side.

[0029] Figure 11 It is a side sectional view showing a caliper body, a cover member, a fixing member, and an outer brake pad of the disc brake according to the first embodiment.

[0030] Figure 12 It is a side sectional view showing a caliper body, a cover member, a fixing member, and an outer brake pad of a disc brake according to a second embodiment.

[0031] Figure 13 It is a side sectional view showing a caliper body, a cover member, a fixing member, and an outer brake pad of a disc brake according to a third embodiment.

[0032] Figure 14 It is a side sectional view showing a caliper body, a cover member, a fixing member, and an outer brake pad of a disc brake according to a fourth embodiment.

[0033] Figure 15 It is a front view showing a caliper body of a disc brake according to a fifth embodiment.

[0034] Figure 16 This is a perspective view of a caliper body, a cover member, and a fixing member of a disc brake according to a fifth embodiment, as viewed from the inner side in the radial direction of the brake disc.

[0035] Figure 17 This is a cross-sectional view of a caliper body, a cover member, and a fixing member of a disc brake according to a fifth embodiment, as viewed from the inside.

[0036] Figure 18 It is a side sectional view showing a caliper body, a cover member, a fixing member, and an outer brake pad of a disc brake according to a fifth embodiment. DETAILED DESCRIPTION

[0037] [First embodiment]

[0038] Below, refer to Figures 1 to 11 A first embodiment will be described.

[0039] Figures 1 to 4 The disc brake 10 of the first embodiment shown is used in a vehicle such as an automobile to apply braking force to the vehicle. Specifically, it is a disc brake for braking the front wheels of a four-wheeled vehicle.

[0040] The disc brake 10 stops the wheel which rotates together with the wheel not shown in the figure. Figure 1 and Figure 2 1 and 2 show a portion of the rotation of the disk-shaped brake disc 11 , which brakes the vehicle having the brake disc 11 .

[0041] The disc brake 10 includes a mounting member 12, a brake caliper 13, a cover member 14, a pair of pad springs 15, and a pair of protective covers 16 (see FIG. Figure 3 ). In addition, Figure 3 and Figure 4 As shown, the disc brake 10 includes a pair of brake pads 17 and 18 .

[0042] Hereinafter, the rotational axis serving as the rotational center of the brake disc 11 will be referred to as the brake disc axis, and the direction in which the brake disc axis extends will be referred to as the brake disc axis direction. The radial direction of the brake disc 11 within the disc brake 10, i.e., the radial direction relative to the rotational axis of the brake disc 11, will be referred to as the brake disc radial direction. The circumferential direction of the brake disc 11 within the disc brake 10, i.e., the circumferential direction relative to the rotational axis of the brake disc 11, will be referred to as the brake disc circumferential direction. The side of the brake disc axis in the brake disc radial direction will be referred to as the brake disc radial inner side. The side of the brake disc radial direction opposite the brake disc axis will be referred to as the brake disc radial outer side. The center side of the brake disc in the circumferential direction will be referred to as the brake disc circumferential inner side. The side of the brake disc circumferential direction opposite the center will be referred to as the brake disc circumferential outer side. A line passing through the brake disc axis and the circumferential center of the disc brake 10 and running along the brake disc radial direction will be referred to as a radial reference line. This radial reference line is perpendicular to the brake disc axis. Furthermore, a plane containing both the radial reference line and the brake disc axis will be referred to as a radial reference plane. In addition, the outer side in the vehicle width direction of the vehicle on which the disc brake 10 is mounted is referred to as the outer side, and the inner side in the vehicle width direction of the vehicle on which the disc brake 10 is mounted is referred to as the inner side.

[0043] like Figure 4 As shown, the mounting member 12 includes an inner beam portion 21 , a pair of inner pad support portions 22 , a pair of outer pad support portions 24 , an outer beam portion 25 , and a pair of pin insertion portions 27 .

[0044] The pair of inner pad support portions 22 includes one inner pad support portion 22 and another inner pad support portion 22. The pair of pin insertion portions 27 includes one pin insertion portion 27 and another pin insertion portion 27. The pair of outer pad support portions 24 includes one outer pad support portion 24 on one side of the brake disc circumference and another outer pad support portion 24 on the other side of the brake disc circumference.

[0045] The mounting member 12 is a casting integrally formed by casting, and has a mirror-symmetrical shape with respect to a radial reference plane.

[0046] like Figure 3 As shown, the inner beam portion 21 is positioned on one side of the brake disc 11 in the brake disc axial direction and is fixed to a non-rotating portion of the vehicle. Therefore, the mounting member 12, including the inner beam portion 21, is mounted to the 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 positioned inward relative to the brake disc 11. Therefore, the inner beam portion 21 mounted to this non-rotating portion is also positioned inward relative to the brake disc 11. The following description of the disc brake 10 assumes that the inner beam portion 21 of the mounting member 12 is mounted to the non-rotating portion of the vehicle.

[0047] The inner beam portion 21 is arranged to extend in the circumferential direction of the brake disc. Figure 4 As shown, the inner beam portion 21 is provided with a pair of mounting bosses 32, each having a mounting hole 31, at both ends of the inner beam portion 21 in the circumferential outer side of the brake disc. The inner beam portion 21 is mounted to a non-rotating portion of the vehicle at the pair of mounting bosses 32 using bolts (not shown) that screw into the mounting holes 31.

[0048] One inner pad support portion 22 extends radially outward from one end of the inner beam portion 21, circumferentially outward from the brake disc. The other inner pad support portion 22 extends radially outward from the other end of the inner beam portion 21, circumferentially outward from the brake disc. Like the inner beam portion 21, the pair of inner pad support portions 22 are arranged inward relative to the brake disc 11.

[0049] One pin insertion portion 27 extends from an outer end portion of the inner pad support portion 22 on one circumferential side of the brake disc in the brake disc radial direction, across the outer circumference of the brake disc 11 in the brake disc axial direction. The other pin insertion portion 27 extends from an outer end portion of the inner pad support portion 22 on the other circumferential side of the brake disc in the brake disc radial direction, across the outer circumference of the brake disc 11 in the brake disc axial direction.

[0050] The outer pad support portion 24 on one circumferential side of the brake disc extends radially inward from the outer end of the pin insertion portion 27 on one circumferential side of the brake disc, opposite to the inner pad support portion 22. The outer pad support portion 24 on the other circumferential side of the other brake disc extends radially inward from the outer end of the pin insertion portion 27 on the other circumferential side of the brake disc. The pair of outer pad support portions 24 are arranged outboard of the brake disc 11.

[0051] The outer beam portion 25 extends in the brake disc circumferential direction and connects the brake disc radially inner ends of the pair of outer pad support portions 24. Like the pair of outer pad support portions 24, the outer beam portion 25 is arranged outside the brake disc 11.

[0052] As described above, the mounting member 12 is provided across the outer periphery of the brake disc 11 and is 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 on which the mounting member 12 is mounted 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.

[0053] The pair of outer pad support portions 24 are formed with pad guide portions 35 on their respective opposing sides. These pad guide portions 35 are recessed in directions separating from each other along the circumferential direction of the brake disc. The pair of inner pad support portions 22 are formed with pad guide portions 36 on their respective opposing sides. These pad guide portions 36 are recessed in directions separating from each other along the circumferential direction of the brake disc.

[0054] One of the pair of pad springs 15 is mounted on the inner pad support portion 22 and the outer pad support portion 24 on one side of the brake disc circumferential direction. The pad spring 15 has a concave guide portion 37 that fits into the concave pad guide portion 35 of the outer pad support portion 24 on one side of the brake disc circumferential direction.

[0055] Furthermore, the pad spring 15 includes a concave guide portion 38 that fits into the concave pad guide portion 36 of the inner pad support portion 22 on one side in the brake disc circumferential direction.

[0056] The other pad spring 15 of the pair of pad springs 15 is mounted on the inner pad support portion 22 and the outer pad support portion 24 located on the other side of the brake disc in the circumferential direction. The pad spring 15 has a concave guide portion 37 that fits into the concave pad guide portion 35 of the outer pad support portion 24 on the other side of the brake disc in the circumferential direction.

[0057] Furthermore, the pad spring 15 includes a concave guide portion 38 that fits into the concave pad guide portion 36 of the inner pad support portion 22 on the other side in the brake disc circumferential direction.

[0058] The brake pad 17 and the brake pad 18 are components of substantially the same shape. Figure 1 As shown in FIG. 1 , the brake pads 17 and 18 have a back plate 41. The back plate 41 has a main body 42 in the middle of the brake disc circumferential direction and ears 43 at both ends on the outer side of the brake disc circumferential direction. Figure 3 As shown, the brake pads 17 and 18 each have a lining 45. The lining 45 is attached to the corresponding back plate 41. Figure 1 The surface of one side in the thickness direction of the main body portion 42 is shown.

[0059] The brake pad 18 of the brake pads 17 and 18 is arranged on the outside. Figure 1 As shown, in the brake pad 18, the ears 43 at both ends of the brake disc's circumferential outer side engage with the pad guides 35 of the pair of outer pad support portions 24 via guides 37 disposed on the outer sides of the pair of pad springs 15. At this point, 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 pad springs 15 so as to be movable in the brake disc's axial direction.

[0060] The brake pad 17 of the brake pads 17 and 18 is arranged on the inner side. Figure 4 As shown in FIG. 1 , the ears 43 at both ends of the brake disc's circumferential outer side engage with the pad guides 36 of the pair of inner pad support portions 22 via guides 38 disposed on the inner sides of the pair of pad springs 15. At this point, the pair of pad springs 15 elastically support the brake pad 17. Thus, the inner brake pad 17 is supported by the pair of inner pad support portions 22 of the mounting member 12 via the pair of pad springs 15 so as to be movable in the brake disc's axial direction.

[0061] like Figure 3 As shown, the brake pads 17 and 18 are both opposed to the brake disc 11 at the lining 45. Therefore, the linings 45 of the brake pads 17 and 18 are in contact with the brake disc 11. The pair of brake pads 17 and 18 are supported on the mounting member 12 via a pair of pad springs 15 and are movable relative to the mounting member 12 in the direction of the brake disc axis.

[0062] An inner brake pad 17 is movably mounted on the mounting member 12. The brake pad 17 is disposed opposite to the inner surface 11a of the two sides of the brake disc 11 in the brake disc axial direction. An outer brake pad 18 is movably mounted on the mounting member 12. The brake pad 18 is disposed opposite to the outer surface 11b of the two sides of the brake disc 11 in the brake disc axial direction.

[0063] On the mounting component 12, Figure 4 The pair of pin insertion portions 27 shown on either side of the brake disc are each formed with pin insertion holes (not shown) extending in the direction of the brake disc axis. A pair of sliding pins 47 on either side of the brake disc of the brake caliper 13 are slidably engaged with these pin insertion holes. Thus, the mounting member 12 supports the brake caliper 13 on the pair of pin insertion portions 27 so that it can slide in the direction of the brake disc axis. In other words, the pair of sliding pins 47 of the brake caliper 13, provided on either side of the brake disc, are slidably engaged with the pin insertion holes (not shown) of the pair of pin insertion portions 27 of the mounting member 12. Thus, the caliper 13 is mounted on the mounting member 12 so that it can move in the direction of the brake disc axis. A pair of protective covers 16 each cover the sliding pins 47 protruding from the pin insertion portions 27.

[0064] The brake caliper 13 includes a brake caliper body 51, a pair of slide pins 47, and a pair of pin mounting bolts 52. The brake caliper 13 has a shape that is substantially mirror-symmetrical with respect to a radial reference plane.

[0065] The brake caliper body 51 is formed as a single piece by casting. Figures 5 to 7 As shown, the caliper main body 51 includes a cylinder portion 55, a bridge portion 56, and an opposing portion 57. Therefore, the caliper 13 including the caliper main body 51 includes the cylinder portion 55, the bridge portion 56, and the opposing portion 57.

[0066] like Figure 3 As shown, the cylinder portion 55 is positioned inwardly of the brake disc 11 in the brake disc axial direction. The bridge portion 56 extends outwardly from the cylinder portion 55 in the brake disc radial direction. In other words, the bridge portion 56 extends from the cylinder portion 55 across the outer circumference of the brake disc 11. The opposing portion 57 extends inwardly of the brake disc radial direction from the side of the bridge portion 56 opposite the cylinder portion 55 in the brake disc axial direction and is positioned outwardly of the brake disc 11 in the brake disc axial direction.

[0067] The caliper body 51 has a pair of pin mounting portions 58 extending from the cylinder portion 55 to both sides of the brake disc circumference. One sliding pin 47 is mounted to one pin mounting portion 58 of the pair of pin mounting portions 58 via a pin mounting bolt 52. The other sliding pin 47 is mounted to the other pin mounting portion 58 of the pair of pin mounting portions 58 via another pin mounting bolt 52.

[0068] like Figure 5 and Figure 6As shown, a pair of cylinder bores 61 are formed in the cylinder portion 55. Each of the cylinder bores 61 has one end opening toward the opposing portion 57 in the brake disc axial direction and is recessed toward the side opposite to the opposing portion 57. In other words, each of the cylinder bores 61 is recessed in the cylinder portion 55 toward the side opposite to the brake disc 11. Both of the cylinder bores 61 are along the brake disc axial direction. The cylinder bores 61 have the same shape, aligning their positions in the brake disc axial and radial directions, while being offset in the circumferential direction. They are arranged in the cylinder portion 55 in an aligned manner. The brake caliper 13 is a so-called dual-piston brake caliper having two cylinder bores 61. The two cylinder bores 61 include one cylinder bore 61 and another cylinder bore 61.

[0069] Figure 3 The pistons 62 shown are arranged in the cylinder holes 61 so as to be movable in the brake disc axis direction. In other words, the cylinder portion 55 has the cylinder holes 61 that accommodate the pistons 62. The brake caliper 13 accommodates the pistons 62 so as to be movable in the brake disc axis direction.

[0070] like Figure 6 As shown, the opposing portion 57 is disposed in the brake disc axial direction opposite to the cylinder portion 55. The opposing portion 57 and the cylinder portion 55 overlap in position in the brake disc radial direction and the brake disc circumferential direction.

[0071] Figure 3 The outer brake pad 18 shown is supported by the mounting member 12 and disposed between the opposing portion 57 and the brake disc 11. The inner brake pad 17 is supported by the mounting member 12 and disposed between the cylinder portion 55 and the pair of pistons 62 provided therein, and the brake disc 11. The pair of pistons 62 oppose the inner brake pad 17 in the direction of the brake disc axis. The pair of pistons 62 move the brake pad 17 toward the brake disc 11 in the direction of the brake disc axis.

[0072] like Figure 6 As shown, an end surface 65 of the caliper body 51 on the opposite side from the cylinder portion 55 in the disc axis direction includes a main surface portion 66 and an inclined surface portion 67 .

[0073] The main surface portion 66 is located radially outward of the brake disc relative to the end surface 65. The main surface portion 66 is in the shape of a plane extending perpendicularly to the axis of the brake disc.

[0074] The inclined surface 67 is located radially inward of the brake disc at the end surface 65. The inclined surface 67 extends from the radially inner edge of the main surface 66 toward the radially inner side of the brake disc. Figure 8 As shown, the inclined surface portion 67 is inclined so as to be located on the cylinder portion 55 side in the disc axial direction as it moves toward the inner side in the disc radial direction.

[0075] like Figure 5 and Figure 6As shown, the opposing portion 57 includes a pair of outer claws 71 (claws) at the outer ends of the brake disc in the circumferential direction, and a middle claw 72 (claw) between the pair of outer claws 71 in the circumferential direction of the brake disc. The pair of outer claws 71 includes one outer claw 71 and another outer claw 71. Both the pair of outer claws 71 and the middle claw 72 are located on the side of the bridge portion 56 opposite the cylinder portion 55 in the direction of the brake disc axis. They extend from the bridge portion 56 radially inward of the brake disc and are located outward of the brake disc axis relative to the brake disc 11.

[0076] In other words, the pair of outer claws 71 and the middle claw 72 are both formed on the front end side of the bridge portion 56 in the direction in which it extends from the cylinder portion 55. The pair of outer claws 71 and the middle claw 72 both overlap with the cylinder portion 55 in the brake disc circumferential direction and the brake disc radial direction, and are arranged opposite the cylinder portion 55 in the brake disc axial direction. The width of each of the pair of outer claws 71 in the brake disc circumferential direction is narrower than the width of the middle claw 72 in the brake disc circumferential direction.

[0077] The main surface portion 66 of the end surface 65 of the caliper body 51 is formed on the outside of the bridge portion 56 and the pair of outer claws 71 and the intermediate claw 72 in the brake disc radial direction. The inclined surface portion 67 of the end surface 65 of the caliper body 51 is formed on the inside of the main surface portion 66 of the pair of outer claws 71 and the intermediate claw 72 in the brake disc radial direction.

[0078] The outer claw 71, the intermediate claw 72, and the other outer claw 71 are spaced apart in the circumferential direction of the brake disc. Consequently, a recess 81 is formed between the outer claw 71 of the opposing portion 57 and the intermediate claw 72 adjacent to the outer claw 71 in the circumferential direction of the brake disc, extending radially inward from the disc. Furthermore, a recess 81 is formed between the intermediate claw 72 of the opposing portion 57 and the other outer claw 71 adjacent to the outer claw 71 in the circumferential direction of the brake disc, extending radially inward from the disc. In other words, the recess 81 is provided between the outer claw 71 and the intermediate claw 72, forming a recessed shape extending radially outward from the radially inner end of the opposing portion 57 toward the disc. The radially inner end of the recess 81 forms an opening 82.

[0079] As described above, the opposing portion 57 includes three claws: a pair of outer claws 71 and a middle claw 72. Therefore, there are two recesses 81, one pair. The two recesses 81 include one recess 81 and the other recess 81. In the caliper body 51, the recesses 81 are formed opposite the pair of cylinder bores 61 in the brake disc axial direction. In other words, the caliper body 51 has the same number of recesses 81 as cylinder bores 61. The two recesses 81 align their positions in the brake disc axial direction and the brake disc radial direction, while being spaced apart in the brake disc circumferential direction.

[0080] A recess 81 disposed between the outer claw 71 and the middle claw 72 overlaps with the cylinder hole 61 in the circumferential and radial directions of the brake disc and faces the cylinder hole 61 in the axial direction of the brake disc. The recess 81 is a portion through which a tool for machining the interior of the opposing cylinder hole 61 is inserted.

[0081] The other recess 81 provided between the other outer claw 71 and the middle claw 72 overlaps with the other cylinder hole 61 in the brake disc circumferential and radial directions and faces the other cylinder hole 61 in the brake disc axial direction. The other recess 81 is a portion through which a tool for machining the interior of the opposing cylinder hole 61 is inserted.

[0082] In other words, the facing portion 57 has one recess 81 facing one cylinder hole 61 and another recess 81 facing the other cylinder hole 61. The caliper body 51, ie, the caliper 13 including the caliper body 51, has a pair of recesses 81.

[0083] These recesses 81 are mirror-symmetrical with respect to the radial reference plane. These recesses 81 align the axial and radial positions of the brake disc, staggering the circumferential positions of the disc. Because the two recesses 81 are mirror-symmetrical with respect to the radial reference plane, one recess 81 will be used as an example for the following description.

[0084] like Figure 5 As shown, the inner peripheral surface 91 of the recessed portion 81 includes a bottom surface 92 (groove bottom surface), a pair of bottom side wall surfaces 93 , a pair of arc-shaped surfaces 94 , and a pair of opening side wall surfaces 95 .

[0085] The pair of bottom sidewall surfaces 93 includes a bottom sidewall surface 93 on the circumferential outer side of the brake disc and a bottom sidewall surface 93 on the circumferential inner side of the brake disc. The pair of arcuate surfaces 94 includes an arcuate surface 94 on the circumferential outer side of the brake disc and an arcuate surface 94 on the circumferential inner side of the brake disc. The pair of open sidewall surfaces 95 includes an open sidewall surface 95 on the circumferential outer side of the brake disc and an open sidewall surface 95 on the circumferential inner side of the brake disc.

[0086] The bottom surface portion 92 is formed in the center portion of the recess 81 in the brake disc circumferential direction. The bottom surface portion 92 is provided at a position opposite to the opening portion 82 of the recess 81 in the brake disc radial direction. The bottom surface portion 92 is provided at an end position of the recess 81 on the opposite side of the opening portion 82 in the extension direction of the radial reference line. The bottom surface portion 92 is planar. The bottom surface portion 92 extends perpendicularly to the radial reference line when viewed along the brake disc axis. Figure 8As shown, when viewed along the circumferential direction of the brake disc, the bottom surface portion 92 extends so as to be located radially outward of the brake disc as it approaches the cylinder portion 55 in the brake disc axial direction. Therefore, the bottom surface portion 92 extends perpendicularly relative to the radial reference plane and extends radially outward of the brake disc as it approaches the cylinder portion 55 in the brake disc axial direction.

[0087] like Figure 5 As shown, the pair of bottom sidewall surfaces 93 are both substantially planar, aligned in both the axial and radial directions of the brake disc, and separated in the circumferential direction of the brake disc. The bottom sidewall surface 93 on the circumferentially outer side of the brake disc extends radially inward from the outer circumferential edge of the bottom surface 92. The bottom sidewall surface 93 on the circumferentially inner side of the brake disc extends radially inward from the inner circumferential edge of the bottom surface 92. Both bottom sidewall surfaces 93 are oriented along the brake disc axis. The closer the pair of bottom sidewall surfaces 93 are to the inner side of the brake disc, the greater the distance between them in the circumferential direction. The pair of bottom sidewall surfaces 93 are mirror-symmetrical.

[0088] The pair of arcuate surfaces 94 are each shaped like a portion of a cylindrical surface. They align their positions in the brake disc axis and radial direction, but are separated in the brake disc circumferential direction. The arcuate surface 94 on the circumferentially outer side of the brake disc extends radially inward from the edge of the bottom sidewall surface 93 on the circumferentially outer side of the brake disc, opposite the bottom surface 92. The arcuate surface 94 is positioned radially outward as it approaches the brake disc radially inward. The arcuate surface 94 is shaped like a portion of a cylindrical surface whose center axis is the central axis of the opposing cylinder bore 61. The arcuate surface 94 on the circumferentially inner side of the brake disc extends radially inward from the edge of the bottom sidewall surface 93 on the circumferentially inner side of the brake disc, opposite the bottom surface 92. The arcuate surface 94 is positioned radially inward as it approaches the brake disc radially inward. The arcuate surface 94 is shaped like a portion of a cylindrical surface whose center axis is the central axis of the opposing cylinder bore 61. Both arcuate surfaces 94 are oriented along the brake disc axis. The pair of arcuate surface portions 94 are spaced apart from each other in the circumferential direction of the brake disc as they move radially inwardly of the brake disc. The pair of arcuate surface portions 94 are mirror-symmetrical in shape.

[0089] The pair of open sidewall surfaces 95 are both substantially planar, aligned in both the brake disc axis and radial direction, and separated in the circumferential direction of the brake disc. The open sidewall surface 95 on the circumferentially outer side of the brake disc extends radially inward from the edge of the arcuate surface 94 on the side opposite the bottom sidewall surface 93. The closer the open sidewall surface 95 is to the radially inner side of the brake disc, the more outward the circumferential direction of the brake disc becomes. The open sidewall surface 95 on the circumferentially inner side of the brake disc extends radially inward from the edge of the arcuate surface 94 on the side opposite the bottom sidewall surface 93. The closer the open sidewall surface 95 is to the radially inner side of the brake disc, the more inward the circumferential direction of the brake disc becomes. Both open sidewall surfaces 95 are oriented along the brake disc axis. The circumferential distance between the open sidewall surfaces 95 increases as they move radially inward. The pair of open sidewall surfaces 95 are mirror-symmetrical.

[0090] The above-described recessed portion 81 has a mirror-symmetrical shape with respect to a plane parallel to the radial reference plane.

[0091] The caliper body 51 has two recesses 81 of the aforementioned shape arranged side by side in the circumferential direction of the brake disc. The bottom surfaces 92 of the two recesses 81 are arranged on the same plane. The two recesses 81 include one recess 81 and the other recess 81. The bottom surfaces 92 of the two recesses 81 include one bottom surface 92 and the other bottom surface 92.

[0092] like Figure 6 and Figure 7 As shown, the caliper body 51 has two cover member fixing holes 98. The two cover member fixing holes 98 include one cover member fixing hole 98 and another cover member fixing hole 98. The one cover member fixing hole 98 is formed at the position of the bottom surface portion 92 of the one recessed portion 81.

[0093] The other cover member fixing hole 98 is formed at a position of the bottom surface portion 92 of the other recessed portion 81 .

[0094] These cover member fixing holes 98 are mirror-symmetrical with respect to a radial reference plane. These cover member fixing holes 98 align the brake disc's axial and radial positions, staggering the disc's circumferential position. Because the two cover member fixing holes 98 are mirror-symmetrical, this description uses one cover member fixing hole 98 as an example.

[0095] like Figure 8As shown, the cover component fixing hole 98 is formed perpendicularly to the bottom surface portion 92 from the center position of the bottom surface portion 92 in the brake disc circumferential direction and the middle position of the brake disc axial direction. Therefore, the cover component fixing hole 98 extends parallel to the radial reference line when viewed in the brake disc axial direction. When viewed in the brake disc circumferential direction, the cover component fixing hole 98 extends in a manner that the closer it is to the radial inner side of the brake disc, the closer it is to the cylinder portion 55 in the brake disc axial direction. Therefore, the cover component fixing hole 98 is provided on the inner periphery of the recess 81 and is formed obliquely relative to the brake disc radial direction. An imaginary line X1 drawn in the direction in which the cover component fixing hole 98 extends does not pass through Figure 6 and Figure 7 The outer claw portion 71 and the middle claw portion 72 are shown. The cover member fixing hole 98 is a screw hole having an internal thread portion formed on the inner peripheral portion.

[0096] The caliper body 51 is provided with two cover member fixing holes 98 arranged side by side in the brake disc circumferential direction.

[0097] like Figures 7 to 11 As shown, the cover member 14 includes a first cover portion 111 and a second cover portion 112. Figures 7 to 9 as well as Figure 11 As shown, the cover member 14 has a protrusion 113. The cover member 14 is, for example, an integrally formed part made of synthetic resin. It should be noted that the cover member 14 is not limited to being made of synthetic resin, and may also be integrally formed using a metal material such as aluminum alloy. Figure 7 As shown, the cover member 14 is provided with two protrusions 113, the number of which is the same as the number of the recesses 81. The cover member 14 has a mirror-symmetrical shape.

[0098] like Figure 10 As shown, the first cover portion 111 is in a generally rectangular, flat plate shape. An end edge 118 of the first cover portion 111, which forms one long side, is convex toward the outside of the first cover portion 111 in the direction in which a pair of end edges 119 on either side of the short side extend. An end edge 120 of the other long side of the first cover portion 111, which forms the opposite side of the end edges 118 in the direction in which the pair of end edges 119 extend, is concave toward the inside of the first cover portion 111 in the direction in which the pair of end edges 119 extend.

[0099] The second cover portion 112 is in a generally rectangular plate shape. The second cover portion 112 extends from the end edge 120 of the first cover portion 111 in a direction away from the first cover portion 111 in the direction in which the pair of end edges 119 of the first cover portion 111 extend. The second cover portion 112 is inclined relative to the first cover portion 111 so that the further away from the first cover portion 111 in the direction in which the pair of end edges 119 of the first cover portion 111 extend, the further away from the first cover portion 111 to one side in the thickness direction of the first cover portion 111. The angle formed by the smaller side of the first cover portion 111 and the second cover portion 112 is an obtuse angle.

[0100] One long side of the second cover portion 112 is formed by the above-mentioned edge portion 120. The second cover portion 112 has an edge portion 121 forming a long side opposite to the first cover portion 111 and a pair of edge portions 122 forming both sides of a short side. When the cover member 14 is viewed along the thickness direction of the first cover portion 111, as shown in FIG. Figure 1 As shown, one end edge portion 119 of the first cover portion 111 and one end edge portion 122 of the second cover portion 112 connected thereto are aligned in a straight line.

[0101] When the cover member 14 is viewed in the thickness direction of the first cover portion 111 , the other end edge 119 of the first cover portion 111 and the other end edge 122 of the second cover portion 112 continuous therewith are aligned in a straight line.

[0102] like Figure 9 and Figure 10 As shown, the length of the first cover portion 111 in the extending direction of the pair of end edges 119 is longer than the length of the second cover portion 112 in the extending direction of the pair of end edges 122. Therefore, the length of the first cover portion 111 in the extending direction of the pair of end edges 119 is longer than the length of the second cover portion 112 in the same direction.

[0103] like Figure 7 and Figure 9 As shown, the two protrusions 113 are both flat-plate-shaped, and protrude from the first cover portion 111 to one side in the thickness direction of the first cover portion 111. The two protrusions 113 protrude from the first cover portion 111 to the same side as the direction in which the second cover portion 112 is inclined. The two protrusions 113 are arranged on the first cover portion 111 at intervals in the extension direction of the end edges 118 and 121. Both protrusions 113 extend in the extension direction of the end edges 118 and 121. The two protrusions 113 are arranged in the same plane. The two protrusions 113 are mirror-symmetrical in shape. Therefore, one protrusion 113 is taken as an example for explanation here.

[0104] like Figure 8 As shown, the protrusion 113 is arranged so that it is farther away from the first cover portion 111 in the thickness direction of the first cover portion 111 and closer to the first cover portion 111. Figure 7 The pair of end edge portions 119 shown are inclined with respect to the thickness direction of the first cover portion 111 so as to be farther away from the second cover portion 112 in the extending direction.

[0105] The fixing member insertion hole 125 is formed perpendicularly to the thickness direction of the protrusion 113. Therefore, the fixing member insertion hole 125 is formed on the first cover 111. Figure 7 In the extending direction of the pair of end edges 119 shown, Figure 8As shown, the fixing member insertion hole 125 is inclined relative to the first cover portion 111 so as to be further away from the first cover portion 111 in the thickness direction of the first cover portion 111 as it approaches the second cover portion 112. The fixing member insertion hole 125 includes an insertion hole portion 126 and a locking hole portion 127.

[0106] The insertion hole 126 is provided in a portion of the fixing member insertion hole 125 on the opposite side from the second cover portion 112 in the extending direction of the pair of end edges 119 of the first cover portion 111. The inner peripheral surface of the insertion hole 126 is cylindrical.

[0107] The locking hole 127 is provided in the portion of the first cover portion 111 extending in the direction of the pair of end edges 119 on the second cover portion 112 side of the fixing member insertion hole 125. The inner circumference of the locking hole 127 is tapered. The diameter of the locking hole 127 decreases as it approaches the insertion hole 126 in the axial direction, with the portion with the smallest diameter being continuous with the insertion hole 126.

[0108] The second cover portion 112 extends from the first cover portion 111 to a position overlapping with the fixing member insertion hole 125 in the thickness direction of the first cover portion 111. The second cover portion 112 overlaps with the entire insertion hole 126 in the thickness direction of the first cover portion 111, and overlaps with a portion on the first cover portion 111 side including the central axis of the locking hole 127.

[0109] like Figure 7 and Figure 9 As shown, the cover member 14 is provided with two protrusions 113 . The two protrusions 113 include one protrusion 113 and another protrusion 113 .

[0110] The cover member 14 is formed by Figure 8 1 shows two fixing members 131 fixed to the caliper body 51. The two fixing members 131 are common members of the same shape. The fixing members 131 are threaded members having a head 132 and a threaded shaft 133. The two fixing members 131 include one fixing member 131 and the other fixing member 131.

[0111] The head 132 is circular, and the end surface 135 on one side of the axial direction is a plane extending in the direction perpendicular to the axis. Figure 3 As shown, a positive (+) shaped tool engagement groove 136 is formed on the head 132. The tool engagement groove 136 is formed on the head 132. Figure 8 The end surface 135 shown is formed to be recessed from the end surface 135 in the axial direction of the head 132. The end surface 137 on the axial side of the head 132 opposite to the end surface 135 is tapered. The further the end surface 137 moves radially inward, the farther it is from the end surface 135 in the axial direction of the head 132.

[0112] The screw shaft portion 133 extends from the end portion of the end surface 137 on the opposite side of the head portion 132 in the axial direction of the head portion 132 from the end surface 135 and away from the head portion 132 in the axial direction of the head portion 132. The screw shaft portion 133 has an external thread formed on its outer periphery.

[0113] The fixing member 131 is a flat head screw.

[0114] like Figure 11 As shown, the cover member 14 is positioned on the side of the opposing portion 57 of the caliper body 51 opposite the cylinder portion 55 in the brake disc axis direction. At this point, the first cover portion 111 of the cover member 14 overlaps with the main surface portion 66 of the caliper body 51 in both the radial and circumferential directions of the brake disc, and abuts against it in surface contact in the brake disc axis direction. Furthermore, the second cover portion 112 of the cover member 14 overlaps with the inclined surface portion 67 of the caliper body 51 in both the radial and circumferential directions of the brake disc, and faces it in the brake disc axis direction. Furthermore, one protrusion 113 of the cover member 14 abuts against one bottom surface portion 92 of the caliper body 51 in surface contact. Furthermore, another protrusion 113 of the cover member 14 abuts against the other bottom surface portion 92 of the caliper body 51 in surface contact.

[0115] In this state, one of the pair of fixing members 131 has its threaded shaft portion 133 inserted through the fixing member insertion hole 125 of the protrusion 113 of the cover member 14. This threaded shaft portion 133 then screws into the cover member fixing hole 98, which opens into the bottom portion 92 of the caliper body 51, the one that abuts the protrusion 113. The tapered end face 137 of the fixing member 131 then abuts the locking hole 127 of the fixing member insertion hole 125 in surface contact, pressing and securing the protrusion 113 to the caliper body 51. In other words, the protrusion 113 is sandwiched between the bottom portion 92 of the caliper body 51 and the end face 137 of the fixing member 131.

[0116] In this state, the threaded shaft portion 133 of the other fixing member 131 is inserted through the fixing member insertion hole 125 of the other protruding portion 113 of the cover member 14. The threaded shaft portion 133 then screws into the cover member fixing hole 98, which opens into the other bottom portion 92 of the pair of bottom portions 92 of the caliper body 51 and abuts the protruding portion 113. The tapered end face 137 of the fixing member 131 then abuts the locking hole portion 127 of the fixing member insertion hole 125 in surface contact, pressing and securing the protruding portion 113 to the caliper body 51. In other words, the protruding portion 113 is clamped between the other bottom portion 92 of the caliper body 51 and the end face 137 of the other fixing member 131.

[0117] In this manner, the cover member 14 is fixed to the caliper body 51 via the two fixing members 131. In other words, the cover member 14 is fixed to the caliper 13 via the fixing members 131 that engage with the cover member fixing holes 98. In further words, the fixing members 131 are fastened to the cover member fixing holes 98, thereby fixing the cover member 14 to the caliper 13.

[0118] like Figure 1 As shown, the cover member 14 fixed to the caliper body 51 by two fixing members 131 covers the caliper body 51 from the side opposite to the cylinder portion 55 in the brake disc axis direction. Figure 5 The pair of outer claws 71, the middle claws 72 and the pair of recesses 81 are shown. In other words, Figure 11 As shown, the cover member 14 is fixed to the caliper body 51 of the caliper 13 via a fixing member 131 that engages with the cover member fixing hole 98, covering the recessed portion 81 in the brake disc axial direction. In this fixed state, the cover member 14 covers the pair of recessed portions 81 of the caliper body 51 from the side opposite to the cylinder portion 55 in the brake disc axial direction, thereby improving the appearance of the disc brake 10.

[0119] The first cover portion 111 of the cover member 14 in the fixed state extends perpendicularly to the brake disc axis. In other words, the first cover portion 111 extends in the brake disc radial direction and the brake disc circumferential direction.

[0120] In the fixed state, the second cover portion 112 of the cover member 14 connected to the first cover portion 111 approaches the brake pad 18 in the brake disc axial direction as it approaches the brake disc radially inward. In other words, the second cover portion 112 is connected to the first cover portion 111 and extends so that the closer it approaches the brake disc axis in the brake disc radial direction, the smaller the gap between it and the closer brake pad 18 of the pair of brake pads 17, 18 in the brake disc axial direction.

[0121] The pair of protrusions 113 of the cover member 14 in the fixed state extend from the first cover portion 111 in the direction of the brake disc axis toward the brake pad 18. Furthermore, the pair of protrusions 113 of the cover member 14 in the fixed state extend perpendicularly relative to the radial reference plane, and are located radially outward of the brake disc as they approach the brake pad 18 in the brake disc axis.

[0122] In addition, in the fixed state of the cover part 14, in the axial direction of the brake disc, the gap between the front end of the second cover part 112 on the radial inner side of the brake disc, that is, the end edge part 121, and the closer brake pad 18 of the pair of brake pads 17 and 18 is set at a position farther away from the closer brake pad 18 of the pair of brake pads 17 and 18 than the imaginary line X1 drawn in the direction extending from the cover part fixing hole 98.

[0123] An imaginary line X1 , which is an extension of the central axis of the fixing member 131 for fixing the cover member 14 , i.e., the central axis of the cover member fixing hole 98 of the caliper 13 , intersects the brake pad 18 , which is closer to the cover member 14 , of the pair of brake pads 17 , 18 .

[0124] In the fixed state, the angle formed between the first cover portion 111 and the second cover portion 112 on the side of the cover member 14 facing the closer brake pad 18 of the pair of brake pads 17 and 18 in the brake disc axial direction is an obtuse angle.

[0125] In this fixed state, the length of the first cover portion 111 of the cover member 14 in the brake disc radial direction is longer than the length of the second cover portion 112 in the brake disc radial direction.

[0126] The cover member 14 in the fixed state has a protrusion 113 protruding toward the recess 81 on the side facing the closer brake pad 18 of the pair of brake pads 17 and 18 . The protrusion 113 is fixed to the caliper body 51 by a fixing member 131 .

[0127] In the fixed state of the cover part 14, in the axial direction of the brake disc, the gap between the front end of the second cover part 112 on the radial inner side of the brake disc, i.e., the end edge part 121, and the closer brake pad 18 of the pair of brake pads 17 and 18 is smaller than the diameter of the threaded part of the threaded shaft part 133 of the fixing part 131, i.e., the outer diameter of the thread.

[0128] In the fixed state, the second cover portion 112 of the cover member 14 extends from the first cover portion 111 in the brake disc axial direction toward the closer of the pair of brake pads 17 and 18, covering the fixing member insertion hole 125 and the cover member fixing hole 98 when viewed in the brake disc radial direction. Specifically, in the fixed state, when viewed from the inner side in the brake disc radial direction, the second cover portion 112 covers the entirety of the cover member fixing hole 98 and a portion of the fixing member insertion hole 125. When viewed from the inner side in the brake disc radial direction, the second cover portion 112 covers the entirety of the insertion hole 126.

[0129] In the brake caliper 13 , the bottom surface portion 92 is inclined so that the distance from the brake disc axis increases as the bottom surface portion 92 approaches the closer brake pad 18 of the pair of brake pads 17 , 18 in the brake disc axis direction.

[0130] like Figure 3As shown, when viewed from the inner side in the radial direction of the brake disc, the second cover portion 112 of the cover member 14 in the fixed state covers at least a portion of the tool engagement groove 136 of the fixing member 131. Specifically, when viewed from the inner side in the radial direction of the brake disc, the second cover portion 112 of the cover member 14 in the fixed state covers the central portion of the tool engagement groove 136 arranged on the central axis of the fixing member 131.

[0131] In the disc brake 10, brake fluid is introduced into two cylinder holes 61 in the cylinder portion 55 of the brake caliper 13 via brake piping (not shown). Brake fluid then acts on pistons 62 in each of the two cylinder holes 61. As a result, both pistons 62 advance toward the brake disc 11, pressing the inner brake pad 17, located between the pistons 62 and the brake disc 11, toward the brake disc 11. This causes the brake pad 17 to move in the axial direction of the brake disc and come into contact with the surface 11a of the brake disc 11. In other words, the pistons 62 that move the inner brake pad 17 are located in the cylinder holes 61 of the cylinder portion 55.

[0132] The reaction force of the piston 62's pressing force causes the caliper body 51 to slide the slide pin 47 relative to the mounting member 12, moving it in the brake disc axial direction. The opposing portion 57 presses the outer brake pad 18, positioned between the opposing portion 57 and the brake disc 11, toward the brake disc 11. This causes the brake pad 18 to move in the brake disc axial direction and come into contact with the surface 11b of the brake disc 11. In other words, the pair of brake pads 17 and 18, supported by the mounting member 12 via the pair of pad springs 15, are pressed toward the brake disc 11 by the caliper 13.

[0133] In this way, the brake caliper 13, through the movement of the multiple pistons 62, clamps the brake pads 17 and 18 from both sides using these pistons 62 and the opposing portion 57, and presses them against both surfaces 11a and 11b of the brake disc 11. As a result, the brake caliper 13 applies frictional resistance to the brake disc 11, generating braking force. The brake caliper 13 is a floating type brake caliper, a fist-type brake caliper.

[0134] Patent Document 1 discloses a disc brake in which a cover member is attached to a portion of the brake caliper visible from the outside of the vehicle. With this disc brake, while installed in the vehicle, the cover member can be removed from the brake caliper by, for example, inserting a tool through the gap between the wheels. For example, in the disc brake described in Patent Document 1, the fixing member can be released by inserting a tool through the gap between the cover member and the brake pad on the side closest to the cover member, thereby engaging the fixing member.

[0135] In the disc brake 10 of the first embodiment, the cover member 14, which covers the recessed portion 81 in the axial direction of the brake disc, is secured to the brake caliper 13 via a securing member 131. The cover member securing hole 98 of the brake caliper 13, with which the securing member 131 engages, is formed on the inner circumference of the recessed portion 81, obliquely relative to the brake disc radial direction. This makes it difficult to engage the securing member 131 with a tool. Consequently, the disc brake 10 can prevent removal of the cover member 14 while it is mounted on the vehicle.

[0136] The first cover portion 111 of the cover member 14 of the disc brake 10 extends in both the brake disc radial and circumferential directions. The second cover portion 112, connected to the first cover portion 111, extends so that the gap between the cover member 112 and the closer brake pad 18 of the pair of brake pads 17 and 18 in the disc disc axial direction decreases as the cover member 112 approaches the brake disc axis in the brake disc radial direction. This makes it difficult for a tool to be inserted into the disc brake 10 through the gap between the cover member 14 and the brake pad 18 and engage with the fixing member 131. Consequently, the disc brake 10 can further suppress removal of the cover member 14 while it is mounted on the vehicle.

[0137] In the disc brake 10, the gap between the front end, i.e., the end edge 121, of the second cover portion 112, located radially inwardly of the brake disc, and one of the pair of brake pads 17 and 18 closest to the end edge 121 is located farther from the brake pad 18 than an imaginary line X1 drawn in the direction in which the cover member fixing hole 98 extends. This makes it difficult to insert a tool into the disc brake 10 through the gap between the cover member 14 and the brake pad 18 and engage the fixing member 131. Consequently, the disc brake 10 can further suppress removal of the cover member 14 while it is mounted on the vehicle.

[0138] The angle formed between the first cover portion 111 and the second cover portion 112 of the cover member 14 of the disc brake 10, on the side of the pair of brake pads 17 and 18 that is closest to the cover member 14 in the disc axial direction, is an obtuse angle. Consequently, the second cover portion 112 can extend radially inward from the first cover portion 111 and approach the brake pad 18 in the disc axial direction, narrowing the gap. This makes it difficult to insert a tool into the disc brake 10 through the gap between the cover member 14 and the brake pad 18 and engage the fixing member 131. Consequently, the disc brake 10 can further suppress removal of the cover member 14 while it is mounted on the vehicle.

[0139] The first cover portion 111 of the cover member 14 of the disc brake 10 has a longer length in the brake disc radial direction than the second cover portion 112. Therefore, the outer appearance of the cover member 14 can be improved.

[0140] The cover member 14 of the disc brake 10 has a protrusion 113 that protrudes toward the recess 81 on the side facing the closer brake pad 18 of the pair of brake pads 17 and 18. The protrusion 113 of the cover member 14 is fixed to the brake caliper 13 by a fixing member 131. Therefore, when assembling the disc brake 10, the cover member 14 can be easily attached to the brake caliper body 51 using the fixing member 131.

[0141] The fixing member 131 of the disc brake 10 is a threaded member. Therefore, by forming the cover member fixing hole 98 of the brake caliper 13 at an angle relative to the brake disc radial direction, it is possible to make it difficult for a tool to engage with the fixing member 131 engaged with the cover member fixing hole 98, as well as to rotate the tool while engaged. Consequently, the disc brake 10 can further prevent removal of the cover member 14 while mounted on the vehicle.

[0142] The fixing member 131 of the disc brake 10 is a flat-head screw. Therefore, by forming the cover member fixing hole 98 of the brake caliper 13 at an angle relative to the brake disc radial direction, it is possible to make it difficult for a tool to engage with the fixing member 131 in the cover member fixing hole 98 and to rotate it while engaged. Consequently, the disc brake 10 can further prevent the cover member 14 from being removed while mounted on the vehicle.

[0143] In the disc brake 10, the gap between the front end (i.e., edge 121) of the second cover portion 112 of the cover member 14, radially inwardly of the brake disc, and the closer of the pair of brake pads 17 and 18, is smaller than the diameter of the threaded portion of the fixing member 131. Consequently, it is difficult to insert a tool of appropriate size, having a diameter equal to the threaded portion, through the gap between the front end 121 of the cover member 14 and the brake pad 18. Consequently, the disc brake 10 can further suppress removal of the cover member 14 while it is mounted on the vehicle.

[0144] The disc brake 10 is tilted such that the distance from the brake disc axis increases as the bottom surface portion 92 of the brake caliper 13 approaches the closer brake pad 18 of the pair of brake pads 17, 18 in the brake disc axis direction. This facilitates the formation of the cover member fixing hole 98 in the brake caliper 13 at an angle relative to the brake disc radial direction.

[0145] The second cover portion 112 of the cover member 14 of the disc brake 10 extends from the first cover portion 111 in the brake disc axial direction toward the closer of the pair of brake pads 17 and 18. When viewed from the inside in the brake disc radial direction, the second cover portion 112 covers the cover member fixing hole 98 that engages with the fixing member 131. This makes it difficult to insert a tool into the disc brake 10 through the gap between the cover member 14 and the brake pad 18 and engage with the fixing member 131. Consequently, the disc brake 10 can be prevented from being removed from the cover member 14 while it is mounted on the vehicle.

[0146] [Second embodiment]

[0147] Next, the main reference Figure 12 The second embodiment will be described focusing on the parts that are different from the first embodiment. The parts that are common to the first embodiment are denoted by the same names and reference numerals.

[0148] In the disc brake 10A of the second embodiment, a brake caliper 13A that is partially different from the brake caliper 13 is used instead of the brake caliper 13. The brake caliper 13A uses a brake caliper body 51A that is partially different from the brake caliper body 51 instead of the brake caliper body 51. The brake caliper body 51A is formed with a relative portion 57A that is partially different from the relative portion 57 instead of the relative portion 57. The relative portion 57A is different from the relative portion 57 in that a cover component fixing hole 98A that is partially different from the cover component fixing hole 98 is formed instead of the cover component fixing hole 98. The cover component fixing hole 98A is formed perpendicularly to the bottom surface portion 92 from the center position of the bottom surface portion 92 of the recessed portion 81 in the brake disc circumferential direction and the middle position in the brake disc axial direction. The cover component fixing hole 98A is not a threaded hole, but a straight hole whose inner circumferential surface is a cylindrical surface. The imaginary line X2 drawn in the direction in which the cover component fixing hole 98 extends does not pass through the outer claw portion 71 and the intermediate claw portion 72 (refer to Figures 5 to 7 Although not shown in the figure, cover member fixing holes 98A are formed in the opposing portion 57A at the positions of the bottom surfaces 92 of the two recessed portions 81 .

[0149] In the disc brake 10A, a cover member 14A, which is partially different from the cover member 14, is used in place of the cover member 14. In place of the protrusion 113, the cover member 14A is formed with a protrusion 113A, which is partially different from the protrusion 113. Although not shown in the figure, the cover member 14A is formed with two protrusions 113A in place of the two protrusions 113. The protrusion 113A differs from the protrusion 113 in that, in place of the fixing member insertion hole 125, a fixing member insertion hole 125A, which is partially different from the fixing member insertion hole 125, is formed. The fixing member insertion hole 125A is a straight hole extending along its entire axial length, with a cylindrical inner circumference.

[0150] In the disc brake 10A, a fixing member 131A, which is different from the fixing member 131, is used instead of the fixing member 131. Although not shown in the figure, two fixing members 131A are used in the disc brake 10A instead of the two fixing members 131. The fixing members 131A are blind rivets of the blind hole fastening type. The fixing members 131A include a cylindrical member 151 and a shaft member 152.

[0151] The tubular component 151 includes: a cylindrical main body portion 161; a flange portion 162, which extends from one axial end of the main body portion 161 to the radial outer side of the main body portion 161; and a biting portion 163, which protrudes from the other axial end of the main body portion 161 to the radial outer side of the main body portion 161 and bites into the inner circumference of the fixing component insertion hole 125A.

[0152] The shaft member 152 includes a cylindrical main shaft portion 171 and a flange portion 172 extending from one axial end of the main shaft portion 171 toward the radially outer side of the main shaft portion 171 .

[0153] The cover member 14A is positioned on the side of the facing portion 57A of the caliper body 51A opposite the cylinder portion 55 in the direction of the brake disc axis. Similar to the first embodiment, the first cover portion 111 and the second cover portion 112 of the cover member 14A are positioned on the end face 65 of the caliper body 51A. Simultaneously, the protrusions 113A of the cover member 14A abut the bottom face 92 of the caliper body 51A in surface contact. Although not shown, the two protrusions 113A of the cover member 14A abut the corresponding bottom face 92 of the caliper body 51A in surface contact.

[0154] Here, before the fixing member 131A is attached to the cover member fixing hole 98A of the caliper body 51A, the biting portion 163 is not formed on the cylindrical member 151. Furthermore, the main shaft portion 171 of the shaft-like member 152 is inserted into the main body portion 161 of the cylindrical member 151, and the flange portion 172 faces the end of the main body portion 161 on the side opposite the flange portion 162 in the axial direction. The shaft-like member 152 is a base member with the main shaft portion 171 being longer in the axial direction on the side opposite the flange portion 172. This base member has a fragile portion formed at a predetermined axial position, which is more fragile than the rest of the portion.

[0155] Before the flange portion 162 of the fixing member 131A contacts the protrusion 113A of the cover member 14A, the main body 161 of the cylindrical member 151 is inserted through the fixing member insertion hole 125A of the protrusion 113A and fits into the cover member fixing hole 98A of the caliper body 51A. Then, while the flange portion 162 of the cylindrical member 151 remains in contact with the protrusion 113A, the base member of the shaft member 152 is moved in a direction to be removed from the cylindrical member 151. This causes the flange portion 172 of the base member of the shaft member 152 to rivet the main body 161 of the cylindrical member 151, causing it to plastically deform and bite into the inner circumference of the cover member fixing hole 98A, forming a bite portion 163. The base member of the shaft member 152 then fractures at the fragile portion, leaving the shaft member 152 remaining within the cylindrical member 151. Thus, the fixing member 131A is fixed to the caliper body 51A, and the cover member 14A is fixed to the caliper body 51A. In other words, the cover member 14A is fixed to the caliper 13A via the fixing member 131A engaging with the cover member fixing hole 98A. In the disc brake 10A, although not shown, the two fixing members 131A are fixed to the corresponding cover member fixing holes 98A of the caliper body 51A, thereby fixing the corresponding protrusions 113A of the cover member 14A to the caliper body 51A.

[0156] The first cover portion 111 and the second cover portion 112 of the cover member 14A fixed to the caliper body 51A by the fixing member 131A are in a fixed state with respect to the end surface 65 of the caliper body 51A and the brake disc 11 (see Figure 3 ) and the brake pad 18 are arranged in the same manner as the first cover portion 111 and the second cover portion 112 of the first embodiment.

[0157] In the fixed state, the gap between the front end 121 of the second cover portion 112 on the inner side in the disc radial direction and the brake pad 18 is smaller than the outer diameter of the flange portion 162 of the fixing member 131A.

[0158] In the fixed state of the cover component 14A, in the axial direction of the brake disc, the gap between the front end of the second cover part 112 on the radial inner side of the brake disc, i.e., the end edge part 121, and the brake pad 18 is set at a position farther away from the brake pad 18 than the imaginary line X2 drawn in the direction extending from the cover component fixing hole 98A.

[0159] An imaginary line X2 , which is an extension of the central axis of the fixing member 131A for fixing the cover member 14A, ie, the central axis of the cover member fixing hole 98A of the caliper 13A, intersects the brake pad 18 .

[0160] In the fixed state, the cover member 14A covers the fixing member insertion hole 125A and the cover member fixing hole 98A when viewed in the brake disc radial direction. Specifically, in the fixed state, the cover member 14A, when viewed from the inner side in the brake disc radial direction, the second cover portion 112 covers the entirety of the cover member fixing hole 98A and the entirety of the fixing member insertion hole 125A.

[0161] In the disc brake 10A of the second embodiment, the cover member fixing hole 98A of the brake caliper 13A, with which the fixing member 131A engages, is formed on the inner circumference of the recess 81 at an angle relative to the brake disc radial direction. This makes it difficult to engage a tool with the fixing member 131A engaged with the cover member fixing hole 98A. Consequently, the disc brake 10A can prevent removal of the cover member 14A while mounted on the vehicle.

[0162] In the disc brake 10A, the gap between the front end (i.e., edge portion 121) of the second cover portion 112, radially inwardly located on the brake disc, and the brake pad 18 is located farther from the brake pad 18 than an imaginary line X2 drawn in the direction in which the cover member fixing hole 98A extends, along the brake disc axis. Consequently, it is difficult for a tool to be inserted into the disc brake 10A through the gap between the cover member 14A and the brake pad 18 and engage with the fixing member 131A. Consequently, the disc brake 10A can further suppress removal of the cover member 14A while it is mounted on the vehicle.

[0163] The fixing member 131A of the disc brake 10A is a caulking member that is caulked into the cover member fixing hole 98A to fix the cover member 14A to the caliper 13A. Therefore, the disc brake 10A can further suppress removal of the cover member 14A while mounted on the vehicle.

[0164] The second cover portion 112 of the cover member 14A of the disc brake 10A extends from the first cover portion 111 in the brake disc axial direction toward the brake pad 18. When viewed from the inside in the brake disc radial direction, the second cover portion 112 covers the cover member fixing hole 98A with which the fixing member 131A engages. This makes it difficult for a tool to be inserted into the disc brake 10A through the gap between the cover member 14A and the brake pad 18 and engage with the fixing member 131A. Consequently, the disc brake 10A can prevent removal of the cover member 14A while it is mounted on the vehicle.

[0165] [Third embodiment]

[0166] Next, the main reference Figure 13 The third embodiment will be described focusing on the parts that are different from the first embodiment. The parts that are common to the first embodiment are denoted by the same names and reference numerals.

[0167] In the disc brake 10B of the third embodiment, a brake caliper 13B, which is partially different from the caliper 13, is used in place of the caliper 13. The caliper 13B also uses a caliper body 51B, which is partially different from the caliper body 51, in place of the caliper body 51. The caliper body 51B includes a facing portion 57B, which is partially different from the facing portion 57, in place of the facing portion 57. The facing portion 57B includes a recessed portion 81B, which is partially different from the recessed portion 81, in place of the recessed portion 81. Although not shown in the figure, the facing portion 57B includes two recessed portions 81B, which are mirror-symmetrical, in place of the two recessed portions 81. Recessed portion 81B differs from recessed portion 81 in that an inner peripheral surface 91B, which is partially different from inner peripheral surface 91, is formed in place of inner peripheral surface 91. Inner peripheral surface 91B includes a bottom portion 92B (a groove bottom portion), which is partially different from bottom portion 92, in place of bottom portion 92.

[0168] The bottom portion 92B is formed in the center of the recess 81B in the brake disc circumferential direction. The bottom portion 92B is positioned opposite the opening 82 of the recess 81B in the brake disc radial direction. The bottom portion 92B is positioned at the end of the recess 81B opposite the opening 82 in the direction of the radial reference line. The bottom portion 92B is planar. When viewed along the brake disc axis, the bottom portion 92B extends so that it is positioned radially inward of the brake disc as it approaches the cylinder portion 55 in the brake disc axis. Therefore, the bottom portion 92B extends perpendicularly relative to the radial reference line and, when viewed along the brake disc axis, it is positioned radially inward of the brake disc as it approaches the cylinder portion 55.

[0169] The caliper body 51B has two recesses 81B of the above-described shape arranged side by side in the circumferential direction of the brake disc. The bottom surfaces 92B of the two recesses 81B are arranged on the same plane.

[0170] The caliper body 51B has a cover member fixing hole 98 formed perpendicularly to the bottom surface 92B of the recess 81B, similar to the first embodiment. Although not shown, cover member fixing holes 98 are formed in the bottom surface 92B of each of the two recesses 81B in the facing portion 57B.

[0171] The cover component fixing hole 98 is formed to open at the center position of the bottom surface portion 92B in the brake disc circumferential direction and at the middle position in the brake disc axial direction. The cover component fixing hole 98 extends parallel to the radial reference line when viewed in the brake disc axial direction. When viewed in the brake disc circumferential direction, the cover component fixing hole 98 extends in a manner that the closer it is to the radial inner side of the brake disc, the farther away from the cylinder portion 55 in the brake disc axial direction. Therefore, the cover component fixing hole 98 is provided on the inner periphery of the recess 81B and is formed to be inclined relative to the brake disc radial direction. An imaginary line X3 drawn in the direction in which the cover component fixing hole 98 extends does not pass through the outer claw portion 71 and the middle claw portion 72 (refer to Figures 5 to 7 ).

[0172] In the disc brake 10B, a cover member 14B that is partially different from the cover member 14 is used instead of the cover member 14. The cover member 14B is formed with a protrusion 113B that is partially different from the protrusion 113, instead of the protrusion 113. Although not shown in the figure, the cover member 14B is formed with two protrusions 113B instead of the two protrusions 113.

[0173] The protrusion 113B is flat and protrudes from the first cover portion 111 toward one side in the thickness direction of the first cover portion 111. The protrusion 113B protrudes from the first cover portion 111 toward the same side as the second cover portion 112 in the oblique direction. The protrusion 113B expands in the direction in which the edge portions 118 and 121 extend.

[0174] The protrusion 113B protrudes from the first cover portion 111 toward one side in the thickness direction of the first cover portion 111 and is formed at a pair of end edges 119 (see FIG. Figure 7 ) is inclined relative to the thickness direction of the first cover portion 111 as it approaches the second cover portion 112 in the extending direction.

[0175] The fixing member insertion holes 125 similar to those in the first embodiment are formed perpendicularly to the thickness direction in the protruding portion 113B. Therefore, the fixing member insertion holes 125 are formed at the pair of end edges 119 (see FIG. 1 ) of the first cover portion 111. Figure 7 ) is closer to the second cover portion 112 in the extending direction, and is inclined relative to the first cover portion 111 in the thickness direction of the first cover portion 111.

[0176] The second cover portion 112 extends from the first cover portion 111 to a position overlapping with the fixing member insertion hole 125 in the thickness direction of the first cover portion 111. The second cover portion 112 overlaps with the entire insertion hole 126 in the thickness direction of the first cover portion 111, and overlaps with a portion on the first cover portion 111 side including the central axis of the locking hole 127.

[0177] The cover member 14B is positioned on the side of the facing portion 57B of the caliper body 51B opposite the cylinder portion 55 in the brake disc axis direction. Similar to the first embodiment, the first cover portion 111 and second cover portion 112 of the cover member 14B are positioned on the end surface 65 of the caliper body 51B, and the protrusions 113B abut against the bottom surface portion 92B of the caliper body 51B in surface contact. Although not shown, the two protrusions 113B of the cover member 14B abut against the corresponding bottom surface portion 92B in surface contact.

[0178] In this state, the fixing member 131, whose threaded shaft portion 133 is inserted through the fixing member insertion hole 125 of the protrusion 113B of the cover member 14B, is threadedly engaged with the cover member fixing hole 98 opened in the bottom surface portion 92B of the caliper body 51B. The tapered end surface 137 of the fixing member 131 then abuts against the locking hole portion 127 of the fixing member insertion hole 125, pressing and securing the protrusion 113B to the caliper body 51B. In other words, the protrusion 113B is clamped between the bottom surface portion 92B of the caliper body 51B and the end surface 137 of the fixing member 131.

[0179] Thus, the cover member 14B is fixed to the caliper body 51B via the fixing members 131. In other words, the cover member 14B is fixed to the caliper 13B via the fixing members 131, which engage with the cover member fixing holes 98. In other words, the fixing members 131 are fastened to the cover member fixing holes 98, thereby securing the cover member 14B to the caliper 13B. Although not shown in the figure, in the disc brake 10B, two fixing members 131 are respectively fixed to corresponding cover member fixing holes 98 of the caliper body 51B, thereby securing the corresponding protrusions 113B of the cover member 14B to the caliper body 51B.

[0180] The first cover portion 111 and the second cover portion 112 of the cover member 14B fixed to the caliper body 51B by the fixing member 131 are in a fixed state with respect to the end surface 65 of the caliper body 51B and the brake disc 11 (see Figure 3 ) and the brake pad 18 are arranged in the same manner as the first cover portion 111 and the second cover portion 112 of the first embodiment.

[0181] The protrusion 113B of the cover member 14B in the fixed state extends from the first cover portion 111 in the direction of the brake disc axis toward the brake pad 18. Furthermore, the protrusion 113B of the cover member 14B in the fixed state extends perpendicularly to the radial reference plane and is positioned radially inward of the brake disc as it approaches the brake pad 18 in the brake disc axis.

[0182] In the fixed state of the cover component 14B, in the axial direction of the brake disc, the gap between the front end of the second cover part 112 on the radial inner side of the brake disc, i.e., the end edge 121, and the brake pad 18 is set at a position farther away from the second cover part 112 than the imaginary line X3 drawn in the direction extending from the cover component fixing hole 98.

[0183] The cover member fixing hole 98 of the caliper body 51B is inclined relative to the brake disc radial direction toward the first cover portion 111 of the cover member 14B in the fixed state, which extends in the brake disc radial direction.

[0184] An imaginary line X3 which is an extension of the central axis of the fixing member 131 for fixing the cover member 14B, that is, the central axis of the cover member fixing hole 98 of the caliper 13B, intersects the second cover portion 112 .

[0185] The cover member 14B in this fixed state has a protrusion 113B that protrudes toward the recess 81 on the side facing the brake pad 18. The protrusion 113B is fixed to the caliper body 51B by a fixing member 131.

[0186] In the fixed state of the cover member 14B, the gap between the front end 121 of the second cover portion 112 on the inner side of the brake disc radial direction and the brake pad 18 is smaller than the diameter of the threaded portion of the threaded shaft portion 133 of the fixing member 131 , i.e., the thread outer diameter.

[0187] In the fixed state, the second cover portion 112 of the cover member 14B extends from the first cover portion 111 in the brake disc axial direction toward the brake pad 18, and covers the fixing member insertion hole 125 and the cover member fixing hole 98 when viewed in the brake disc radial direction. Specifically, in the fixed state, when viewed from the inner side in the brake disc radial direction, the second cover portion 112 covers the entire cover member fixing hole 98 and partially covers the fixing member insertion hole 125. When viewed from the inner side in the brake disc radial direction, the second cover portion 112 covers the entire insertion hole 126.

[0188] The bottom surface portion 92B of the caliper 13B is inclined so that the distance from the disc axis decreases as the bottom surface portion 92B approaches the brake pad 18 in the disc axis direction.

[0189] When viewed from the inner side in the radial direction of the brake disc, the second cover portion 112 of the cover member 14B in the fixed state covers the tool engagement groove 136 of the fixing member 131 (see FIG. Figure 4 Specifically, when viewed from the inner side of the brake disc in the radial direction, the second cover portion 112 of the cover member 14B in the fixed state covers the tool engagement groove 136 (see Figure 4 ) is arranged in the central part on the central axis of the fixing component 131.

[0190] In the disc brake 10B of the third embodiment, the cover member fixing hole 98 of the brake caliper 13B, into which the fixing member 131 engages, is formed on the inner circumference of the recess 81B, inclined relative to the brake disc radial direction. This makes it difficult to engage the fixing member 131 with a tool in the cover member fixing hole 98. Consequently, the disc brake 10B can prevent removal of the cover member 14B while it is mounted on the vehicle.

[0191] In the disc brake 10B, the gap between the front end (i.e., edge portion 121) of the second cover portion 112, radially inwardly located on the brake disc, and the brake pad 18 is located farther from the second cover portion 112 than an imaginary line X3 drawn in the direction in which the cover member fixing hole 98 extends, along the brake disc axis. Consequently, it is difficult for a tool to be inserted into the disc brake 10B through the gap between the cover member 14B and the brake pad 18 and engage with the fixing member 131. Consequently, the disc brake 10B can further suppress removal of the cover member 14B while it is mounted on the vehicle.

[0192] The cover member 14B of the disc brake 10B has a protrusion 113B on the side facing the brake pad 18 that protrudes toward the recess 81. Furthermore, the protrusion 113B of the cover member 14B is fixed to the caliper 13B via a fixing member 131. Therefore, when assembling the disc brake 10B, the cover member 14B can be easily attached to the caliper body 51B using the fixing member 131.

[0193] In the disc brake 10B, the cover member fixing hole 98 of the caliper body 51B is inclined relative to the brake disc radial direction toward the first cover portion 111 of the cover member 14B, which extends in the brake disc radial direction. This makes it difficult to insert a tool into the disc brake 10 through the gap between the cover member 14B and the brake pad 18 and engage the fixing member 131. Consequently, the disc brake 10B can further suppress removal of the cover member 14B while it is mounted on the vehicle.

[0194] The bottom surface portion 92B of the brake caliper 13B of the disc brake 10B is inclined so that the distance from the brake disc axis decreases as it approaches the brake pad 18 in the brake disc axial direction. This facilitates processing when forming the cover member fixing hole 98 in the brake caliper 13B at an angle relative to the brake disc radial direction.

[0195] The second cover portion 112 of the cover member 14B of the disc brake 10B extends from the first cover portion 111 in the brake disc axial direction toward the brake pad 18. When viewed from the inside in the brake disc radial direction, the second cover portion 112 covers the cover member fixing hole 98 with which the fixing member 131 engages. Therefore, it is difficult to insert a tool into the disc brake 10B through the gap between the cover member 14B and the brake pad 18 to engage with the fixing member 131. Consequently, the disc brake 10B can suppress removal of the cover member 14B while it is mounted on the vehicle.

[0196] It should be noted that in the disc brake 10B of the third embodiment, instead of the fixing structure of the cover member 14B to the caliper body 51B based on the cover member fixing hole 98, the fixing member insertion hole 125 and the fixing member 131, a fixing structure based on the cover member fixing hole 98A, the fixing member insertion hole 125A and the fixing member 131A of the second embodiment can also be adopted.

[0197] [Fourth embodiment]

[0198] Next, the main reference Figure 14 The fourth embodiment will be described focusing on the parts that are different from the first embodiment. The parts that are common to the first embodiment are denoted by the same names and reference numerals.

[0199] In the disc brake 10C of the fourth embodiment, a brake caliper 13C is used in place of the brake caliper 13. The brake caliper 13C uses a brake caliper body 51C that is partially different from the brake caliper body 51. The brake caliper body 51C includes a facing portion 57C that is partially different from the facing portion 57, replacing the facing portion 57. The facing portion 57C includes a recessed portion 81C that is partially different from the recessed portion 81, replacing the recessed portion 81. Although not shown in the figure, the facing portion 57C includes two recessed portions 81C that are mirror-symmetrical, replacing the two recessed portions 81. Recessed portion 81C differs from recessed portion 81 in that inner circumferential surface 91C is formed instead of inner circumferential surface 91. Inner circumferential surface 91C includes a bottom portion 92C (a recessed bottom portion) that is partially different from bottom portion 92, replacing the bottom portion 92.

[0200] The bottom portion 92C is formed in the center of the recess 81C in the brake disc circumferential direction. The bottom portion 92C is located opposite the opening 82 of the recess 81C in the brake disc radial direction. The bottom portion 92C is located at the end of the recess 81C opposite the opening 82, in the direction of the radial reference line. The bottom portion 92C is planar. When viewed along the brake disc axis, the bottom portion 92C extends perpendicular to the radial reference line. When viewed along the brake disc circumferential direction, the bottom portion 92C extends parallel to the brake disc axis. Therefore, the bottom portion 92C extends perpendicular to the radial reference line.

[0201] The caliper body 51C is provided with two recessed portions 81C having the above-described shape arranged side by side in the circumferential direction of the brake disc. The bottom surfaces 92C of the two recessed portions 81C are arranged on the same plane.

[0202] The caliper body 51C has a cover member fixing hole 98 formed perpendicularly to the bottom surface 92C of the recess 81C, similar to the first embodiment. Although not shown, cover member fixing holes 98 are formed in the bottom surface 92C of each of the two recesses 81C in the facing portion 57C.

[0203] The cover member fixing hole 98 is formed to open at the center of the bottom surface portion 92C in the brake disc circumferential direction and at an intermediate position in the brake disc axial direction. When viewed along the brake disc axis, the cover member fixing hole 98 extends parallel to the radial reference line. When viewed along the brake disc circumferential direction, the cover member fixing hole 98 extends perpendicular to the brake disc axis. Therefore, the cover member fixing hole 98 is provided on the inner circumference of the recess 81C and is formed in the brake disc radial direction. An imaginary line X4 drawn in the direction in which the cover member fixing hole 98 extends does not pass through the outer claw portion 71 or the intermediate claw portion 72.

[0204] In the disc brake 10C, a cover member 14C that is partially different from the cover member 14 is used instead of the cover member 14. The cover member 14C has a protrusion 113C that is partially different from the protrusion 113, instead of the protrusion 113. Although not shown, the cover member 14C has two protrusions 113C instead of the two protrusions 113.

[0205] The protrusion 113C is flat and protrudes from the first cover portion 111 toward one side in the thickness direction of the first cover portion 111. The protrusion 113C protrudes from the first cover portion 111 toward the same side as the second cover portion 112 in the oblique direction. The protrusion 113C extends in the direction in which the edge portions 118 and 121 extend.

[0206] The protrusion 113C protrudes from the first cover portion 111 to one side along the thickness direction of the first cover portion 111 perpendicularly to the first cover portion 111 .

[0207] The protruding portion 113C is provided with a fixing member insertion hole 125 similar to that of the first embodiment, perpendicular to the thickness direction of the protruding portion 113C. Therefore, the fixing member insertion hole 125 is formed along the pair of end edges 119 (see FIG. 1 ) of the first cover portion 111. Figure 7 The fixing member insertion hole 125 is formed parallel to the first cover portion 111.

[0208] The second cover portion 112 extends from the first cover portion 111 to a position overlapping with the fixing member insertion hole 125 in the thickness direction of the first cover portion 111. The second cover portion 112 overlaps with the entire insertion hole 126 in the thickness direction of the first cover portion 111, and overlaps with a portion on the first cover portion 111 side including the central axis of the locking hole 127.

[0209] The cover member 14C is positioned on the side of the facing portion 57C of the caliper body 51C opposite the cylinder portion 55 in the direction of the brake disc axis. The first and second cover portions 111, 112 of the cover member 14C are positioned relative to the end face 65 of the caliper body 51C, similar to the first embodiment, and the protrusions 113C abut the bottom surface portion 92C of the caliper body 51C in surface contact. Although not shown, the two protrusions 113C of the cover member 14C abut the corresponding bottom surface portion 92C in surface contact.

[0210] In this state, the fixing member 131, whose threaded shaft portion 133 is inserted through the fixing member insertion hole 125 of the protrusion 113C of the cover member 14C, is threadedly engaged with the cover member fixing hole 98 opened in the bottom surface portion 92C of the caliper body 51C. The tapered end surface 137 of the fixing member 131 then abuts against the locking hole portion 127 of the fixing member insertion hole 125, pressing and securing the protrusion 113C to the caliper body 51C. In other words, the protrusion 113C is clamped between the bottom surface portion 92C of the caliper body 51C and the end surface 137 of the fixing member 131.

[0211] Thus, the cover member 14C is fixed to the caliper body 51C via the fixing members 131. In other words, the cover member 14C is fixed to the caliper 13C via the fixing members 131 engaging with the cover member fixing holes 98. In other words, the fixing members 131 are fastened to the cover member fixing holes 98, thereby securing the cover member 14C to the caliper 13C. Although not shown in the figure, in the disc brake 10C, two fixing members 131 are respectively fixed to corresponding cover member fixing holes 98 of the caliper body 51C, thereby securing the corresponding protrusions 113C of the cover member 14C to the caliper body 51C.

[0212] The first cover portion 111 and the second cover portion 112 of the cover member 14C fixed to the caliper body 51C by the fixing member 131 are in a fixed state with respect to the end surface 65 of the caliper body 51C and the brake disc 11 (see Figure 3 ) and the brake pad 18 are arranged in the same manner as the first cover portion 111 and the second cover portion 112 of the first embodiment.

[0213] The protrusion 113C of the fixed cover member 14C extends from the first cover portion 111 in the disc axial direction toward the brake pad 18. The protrusion 113C of the fixed cover member 14C extends perpendicularly to the radial reference plane and parallel to the disc axial direction.

[0214] In the fixed state of the cover component 14C, in the axial direction of the brake disc, the gap between the front end of the second cover part 112 on the radial inner side of the brake disc, i.e., the end edge 121, and the brake pad 18 is set at a position farther away from the second cover part 112 than the imaginary line X4 drawn in the direction extending from the cover component fixing hole 98.

[0215] An imaginary line X4 , which is an extension of the central axis of the fixing member 131 for fixing the cover member 14C, ie, the central axis of the cover member fixing hole 98 of the caliper 13 , intersects the second cover portion 112 .

[0216] The cover member 14C in this fixed state has a protrusion 113C that protrudes toward the recess 81 on the side facing the brake pad 18. The protrusion 113C is fixed to the caliper body 51C by a fixing member 131.

[0217] In the fixed state of the cover member 14C, the gap between the front end 121 of the second cover portion 112 on the inner side of the brake disc radial direction and the brake pad 18 is smaller than the diameter of the threaded portion of the threaded shaft portion 133 of the fixing member 131 , i.e., the thread outer diameter.

[0218] In the fixed state, the second cover portion 112 of the cover member 14C extends from the first cover portion 111 in the brake disc axial direction toward the brake pad 18, and covers the fixing member insertion hole 125 and the cover member fixing hole 98 when viewed in the brake disc radial direction. Specifically, in the fixed state, when the cover member 14C is viewed from the inner side in the brake disc radial direction, the second cover portion 112 covers the entire cover member fixing hole 98 and partially covers the fixing member insertion hole 125. When viewed from the inner side in the brake disc radial direction, the second cover portion 112 covers the entire insertion hole 126.

[0219] The bottom surface portion 92C of the caliper 13C is arranged along the disc axis direction.

[0220] When viewed from the inner side in the radial direction of the brake disc, the second cover portion 112 of the cover member 14C in the fixed state covers the tool engagement groove 136 of the fixing member 131 (see FIG. Figure 4 Specifically, when viewed from the inner side of the brake disc in the radial direction, the second cover portion 112 of the cover member 14C in the fixed state covers the tool engagement groove 136 (see Figure 4 ) is arranged in the central part on the central axis of the fixing component 131.

[0221] In the disc brake 10C of the fourth embodiment, the second cover portion 112 of the cover member 14C extends from the first cover portion 111 in the brake disc axial direction toward the brake pad 18. When viewed from the inside in the brake disc radial direction, the second cover portion 112 covers the cover member fixing hole 98 with which the fixing member 131 engages. This makes it difficult for a tool to be inserted into the disc brake 10C through the gap between the cover member 14C and the brake pad 18 and engage with the fixing member 131. Consequently, the disc brake 10C can prevent removal of the cover member 14C while it is mounted on the vehicle.

[0222] In the disc brake 10C, the gap between the front end (i.e., edge portion 121) of the second cover portion 112, radially inwardly located on the brake disc, and the brake pad 18 is located farther from the second cover portion 112 than an imaginary line X4 drawn in the direction in which the cover member fixing hole 98 extends, along the brake disc axis. Consequently, it is difficult for a tool to be inserted into the disc brake 10C through the gap between the cover member 14C and the brake pad 18 and engage with the fixing member 131. Consequently, the disc brake 10C can further suppress removal of the cover member 14C while it is mounted on the vehicle.

[0223] The cover member 14C of the disc brake 10C has a protrusion 113C on the side facing the brake pad 18 that protrudes toward the recess 81. Furthermore, the protrusion 113C of the cover member 14C is fixed to the brake caliper 13C by a fixing member 131. Therefore, when assembling the disc brake 10C, the cover member 14C can be easily attached to the brake caliper body 51C using the fixing member 131.

[0224] The bottom surface portion 92C of the caliper 13C of the disc brake 10C is parallel to the disc axis direction. Therefore, the processing of forming the cover member fixing hole 98 in the caliper 13C along the disc radial direction is facilitated.

[0225] The second cover portion 112 of the cover member 14C of the disc brake 10C extends from the first cover portion 111 in the brake disc axial direction toward the brake pad 18. When viewed from the inside in the brake disc radial direction, the second cover portion 112 covers the cover member fixing hole 98 with which the fixing member 131 engages. Therefore, it is difficult to insert a tool into the disc brake 10C through the gap between the cover member 14C and the brake pad 18 to engage with the fixing member 131. Consequently, the disc brake 10C can prevent removal of the cover member 14C while it is mounted on the vehicle.

[0226] It should be noted that in the disc brake 10C of the fourth embodiment, instead of the fixing structure of the cover member 14C to the caliper body 51C based on the cover member fixing hole 98, the fixing member insertion hole 125 and the fixing member 131, a fixing structure based on the cover member fixing hole 98A, the fixing member insertion hole 125A and the fixing member 131A of the second embodiment can also be adopted.

[0227] [Fifth embodiment]

[0228] Next, the main reference Figures 15 to 18 The fifth embodiment will be described focusing on the parts that are different from the first embodiment. It should be noted that the parts that are common to the first embodiment are denoted by the same names and reference numerals.

[0229] In the disc brake 10D of the fifth embodiment, as shown in FIG. Figures 15 to 18 As shown, a brake caliper 13D having a different portion from the brake caliper 13 is used instead of the brake caliper 13. The brake caliper 13D uses a brake caliper body 51D having a different portion from the brake caliper body 51 instead of the brake caliper body 51. The brake caliper body 51D is formed with an opposing portion 57D having a different portion from the opposing portion 57 instead of the opposing portion 57. Figures 15 to 17 As shown, the opposing portion 57D is formed with two recessed portions 81D that are partially different from the two recessed portions 81 instead of the two recessed portions 81 .

[0230] like Figure 15 and Figure 18 As shown, an end surface 65D of the caliper body 51D on the side opposite to the cylinder portion 55 in the disc axial direction includes a main surface portion 66D and an inclined surface portion 67D.

[0231] The main surface portion 66D is located on the outer side in the brake disc radial direction of the end surface 65D. The main surface portion 66D is a flat surface extending perpendicularly to the brake disc axis.

[0232] The inclined surface portion 67D is located on the inner side in the brake disc radial direction of the end surface 65D. The inclined surface portion 67D spreads from the inner edge portion of the main surface portion 66D in the brake disc radial direction toward the inner side in the brake disc radial direction.

[0233] When observing along the circumference of the brake disc, Figure 18 As shown, the main surface portion 66D is inclined so as to be located closer to the cylinder portion 55 in the disc axial direction as it approaches the inner side in the disc radial direction.

[0234] The caliper body 51D includes a main surface portion 66D formed on the outside of the bridge portion 56 and the pair of outer claws 71 and the intermediate claw 72D in the brake disc radial direction. The caliper body 51D includes an inclined surface portion 67D formed on the inside of the main surface portion 66D of the pair of outer claws 71 and the intermediate claw 72D in the brake disc radial direction.

[0235] like Figure 15 As shown, the opposing portion 57D includes an intermediate claw portion 72D (claw portion) that is partially different from the intermediate claw portion 72, in the intermediate position in the brake disc circumferential direction of the pair of outer claw portions 71, which is the same as the first embodiment, instead of the intermediate claw portion 72. The intermediate claw portion 72D is located on the opposite side of the bridge portion 56 in the brake disc axial direction from the cylinder portion 55, similarly to the pair of outer claw portions 71, and extends from the bridge portion 56 toward the inner side of the brake disc radial direction and faces the brake disc 11 (see FIG. Figure 3 ) is located outboard in the brake disc axial direction. In other words, like the pair of outer claws 71, the intermediate claw 72D is formed on the distal end of the bridge portion 56 in the direction in which it extends from the cylinder portion 55. Like the pair of outer claws 71, the intermediate claw 72D overlaps with the cylinder portion 55 in the brake disc circumferential and radial directions and is positioned opposite the cylinder portion 55 in the brake disc axial direction. The width of the intermediate claw 72D in the brake disc circumferential direction is wider than the width of each of the pair of outer claws 71 in the brake disc circumferential direction.

[0236] One outer claw 71 of the pair of outer claws 71, the intermediate claw 72D, and the other outer claw 71 of the pair of outer claws 71 are spaced apart in the brake disc circumferential direction. Consequently, the facing portion 57D forms a recessed portion 81D extending radially inward from the outer claw 71 and the intermediate claw 72D adjacent to the outer claw 71 in the brake disc circumferential direction. Furthermore, a recessed portion 81D extending radially inward from the intermediate claw 72D of the facing portion 57D and the other outer claw 71 of the pair of outer claws 71 adjacent to the intermediate claw 72D in the brake disc circumferential direction forms a recessed portion 81D extending radially inward from the radially inner end of the facing portion 57D. In other words, the recessed portion 81D is provided between the outer claw 71 and the intermediate claw 72D, and is recessed from the radially inner end of the facing portion 57D toward the radially outer side of the brake disc. The inner end portion of the recessed portion 81D in the brake disc radial direction forms an opening portion 82 similar to that of the first embodiment.

[0237] As described above, the opposing portion 57D includes three claws: a pair of outer claws 71 and a middle claw 72D. Therefore, a pair of two recesses 81D are provided. The two recesses 81D include one recess 81D and the other recess 81D. In the caliper body 51D, the recesses 81D are formed opposite the pair of cylinder bores 61 in the brake disc axial direction. In other words, the caliper body 51D has the same number of recesses 81D as cylinder bores 61. The two recesses 81D are aligned in the disc axial and radial directions, but separated in the disc circumferential direction.

[0238] A recess 81D provided between the outer claw 71 and the intermediate claw 72D coincides with the cylinder hole 61 in the disc circumferential and disc radial directions and faces the disc axis. The recess 81D is a portion through which a tool for machining the interior of the opposing cylinder hole 61 is inserted.

[0239] The other recess 81D provided between the other outer claw 71 and the middle claw 72D overlaps with the other cylinder hole 61 in the brake disc circumferential and radial directions and faces the other cylinder hole 61 in the brake disc axial direction. The other recess 81D is a portion through which a tool for machining the interior of the opposing cylinder hole 61 is inserted.

[0240] In other words, the facing portion 57D has one recess 81D facing one cylinder hole 61 and another recess 81D facing the other cylinder hole 61. The caliper body 51D, that is, the caliper 13D including the caliper body 51D, has a pair of recesses 81D.

[0241] These recessed portions 81D have mirror-symmetrical shapes with respect to the radial reference plane.

[0242] These recesses 81D align the axial and radial positions of the brake disc, staggering the circumferential positions of the brake disc. The two recesses 81D are mirror-symmetrical with respect to the radial reference plane, so one recess 81D is used as an example for the following description.

[0243] The inner peripheral surface 91D of the recessed portion 81D includes a hole opening surface portion 92D, a pair of hole side wall surface portions 93D, an arcuate surface portion 94D, and a pair of opening side wall surface portions 95 similar to those of the first embodiment.

[0244] The pair of hole sidewall surfaces 93D includes a hole sidewall surface 93D on the outside of the brake disc circumferential direction and a hole sidewall surface 93D on the inside of the brake disc circumferential direction. The pair of opening sidewall surfaces 95 includes an opening sidewall surface 95 on the outside of the brake disc circumferential direction and an opening sidewall surface 95 on the inside of the brake disc circumferential direction.

[0245] The hole opening surface 92D is located closer to the intermediate claw portion 72D than the center portion of the recess 81D in the brake disc circumferential direction. In other words, the hole opening surface 92D is located outside the center portion of the recess 81D in the brake disc circumferential direction. The hole opening surface 92D is planar. When viewed along the brake disc axis, the hole opening surface 92D extends obliquely relative to the radial reference line.

[0246] When viewed along the brake disc axis, the hole opening surface 92D is positioned radially inward as it approaches the brake disc circumferential inner side. When viewed along the brake disc circumferential direction, the hole opening surface 92D extends radially outward as it approaches the cylinder portion 55 in the brake disc axis.

[0247] Therefore, the hole opening surface portion 92D is inclined with respect to the radial reference plane, and expands so as to be located further outward in the brake disc radial direction as it approaches the cylinder portion 55 in the brake disc axial direction.

[0248] The pair of hole sidewall surfaces 93D are both substantially planar, aligned with each other in the brake disc axis direction and separated in the brake disc circumferential direction. The hole sidewall surface 93D on the circumferentially outer side of the brake disc extends from the outer circumferential edge of the hole opening surface 92D toward the radially inner side of the brake disc and the circumferentially outer side of the brake disc. The hole sidewall surface 93D on the circumferentially inner side of the brake disc extends from the inner circumferential edge of the hole opening surface 92D toward the radially inner side of the brake disc and the circumferentially outer side of the brake disc. Both hole sidewall surfaces 93D are oriented along the brake disc axis. The closer the pair of hole sidewall surfaces 93D are to the radially inner side of the brake disc and the circumferentially outer side of the brake disc, the longer the separation between them. The pair of hole sidewall surfaces 93D are mirror-symmetrical.

[0249] The arcuate surface 94D is a portion of a cylindrical surface. The arcuate surface 94D extends outward from the edge of the hole sidewall surface 93D on the circumferentially outer side of the brake disc, opposite the hole opening surface 92D. This arcuate surface 94D is positioned slightly behind the radially outer side of the brake disc, and then radially inward. This arcuate surface 94D forms a portion of a cylindrical surface whose central axis is the central axis of the opposing cylinder bore 61. The arcuate surface 94D extends along the brake disc axis.

[0250] The pair of opening sidewall surfaces 95 are both substantially planar, aligned in both the brake disc axis and radial direction, and separated in the circumferential direction of the brake disc. The opening sidewall surface 95 on the circumferentially outer side of the brake disc extends from the outer circumferential edge of the arcuate surface 94D toward the inner side of the brake disc in the radial direction. The opening sidewall surface 95 on the circumferentially inner side of the brake disc extends from the inner circumferential edge of the hole sidewall surface 93D of the pair of hole sidewall surfaces 93D, on the side opposite to the hole opening surface 92D, toward the inner side of the brake disc in the radial direction. The opening sidewall surface 95 is positioned toward the inner side of the brake disc in the radial direction. Both opening sidewall surfaces 95 are oriented along the brake disc axis. The distance between the opening sidewall surfaces 95 in the circumferential direction of the brake disc increases as they move toward the inner side of the brake disc in the radial direction. The pair of opening sidewall surfaces 95 are mirror-symmetrical.

[0251] The caliper body 51D is provided with two recessed portions 81D having the above-described shape arranged in parallel along the circumferential direction of the brake disc. The two recessed portions 81D are arranged such that their respective hole opening surfaces 92D form an obtuse angle with each other.

[0252] like Figure 17 As shown, the caliper body 51D has two cover member fixing holes 98 similar to those in the first embodiment. The two cover member fixing holes 98 include one cover member fixing hole 98 and the other cover member fixing hole 98. The one cover member fixing hole 98 is formed perpendicularly to the hole opening surface 92D of one of the two recesses 81D. The other cover member fixing hole 98 is formed perpendicularly to the hole opening surface 92D of the other of the two recesses 81D.

[0253] These cover member fixing holes 98 are mirror-symmetrical with respect to a radial reference plane. These cover member fixing holes 98 align the brake disc's axial and radial positions, staggering the disc's circumferential position. Because the two cover member fixing holes 98 are mirror-symmetrical, this description uses one cover member fixing hole 98 as an example.

[0254] The cover component fixing hole 98 is formed to open at the center position of the hole opening surface 92D in the brake disc circumferential direction and at the middle position of the brake disc axial direction. Therefore, when viewed in the brake disc axial direction, the cover component fixing hole 98 extends obliquely with respect to the radial reference line. When viewed in the brake disc axial direction, the deeper the depth of the cover component fixing hole 98, the closer it is to the radial reference line. When viewed in the brake disc circumferential direction, the cover component fixing hole 98 extends in such a manner that the shallower the depth, the closer it is to the cylinder portion 55 in the brake disc axial direction. Therefore, the cover component fixing hole 98 is provided on the inner periphery of the recess 81D and is formed obliquely with respect to the brake disc radial direction. The hole 98 extending in the direction in which the cover component fixing hole 98 extends is drawn out. Figure 18 The imaginary line X5 shown does not pass through the outer claw portion 71 and the intermediate claw portion 72D.

[0255] like Figure 17 As shown in FIG. 1 , two cover member fixing holes 98 having the above-described structure are provided in the caliper body 51D in an aligned manner along the circumferential direction of the brake disc.

[0256] In the disc brake 10D, a cover member 14D that is partially different from the cover member 14 is used instead of the cover member 14. The cover member 14D is formed with two protrusions 113D that are partially different from the two protrusions 113 instead of the two protrusions 113. The cover member 14D has a mirror-symmetrical shape.

[0257] Both protrusions 113D are flat-plate-shaped and protrude from the first cover portion 111 toward one side in the thickness direction of the first cover portion 111. The two protrusions 113D protrude from the first cover portion 111 toward the same side as the direction in which the second cover portion 112 is inclined. The two protrusions 113D are arranged on the first cover portion 111 at intervals in the direction in which the end edge portion 121 extends. Both protrusions 113D extend at an angle relative to the direction in which the end edge portion 121 extends. The two protrusions 113D are mirror-symmetrical in shape, so one protrusion 113D will be used as an example for description.

[0258] One protrusion 113D is inclined relative to the direction in which the end edge portion 121 extends, such that the closer it is to the other protrusion 113D in the direction in which the end edge portion 121 extends, the closer it is to the second cover portion 112 in the direction in which the pair of end edges 119 extend. The protrusion 113D is inclined relative to the thickness direction of the first cover portion 111, such that the farther it is from the first cover portion 111 in the thickness direction of the first cover portion 111, the farther it is from the second cover portion 112 in the direction in which the pair of end edges 119 extend.

[0259] The protrusion 113D has a fixing member insertion hole 125 formed perpendicularly to the thickness direction, similar to that of the first embodiment. Therefore, the fixing member insertion hole 125 of one protrusion 113D is inclined relative to the extending direction of the pair of end edges 119 of the first cover portion 111, such that the further away from the second cover portion 112 in the extending direction of the pair of end edges 119 of the first cover portion 111, the closer to the other protrusion 113D in the extending direction of the end edges 121. The fixing member insertion hole 125 is inclined relative to the first cover portion 111, such that the further away from the second cover portion 112 in the extending direction of the pair of end edges 119, the closer to the first cover portion 111 in the thickness direction of the first cover portion 111.

[0260] The second cover portion 112 extends from the first cover portion 111 to a position overlapping with the fixing member insertion hole 125 in the thickness direction of the first cover portion 111. The second cover portion 112 overlaps with the entire insertion hole 126 in the thickness direction of the first cover portion 111, and overlaps with a portion on the first cover portion 111 side including the central axis of the locking hole 127.

[0261] The cover member 14D is provided with two or more protrusions 113D.

[0262] The cover member 14D is fixed to the caliper body 51D by two fixing members 131 .

[0263] like Figure 16 and Figure 18 As shown, the cover member 14D is arranged on the side of the opposing portion 57D of the caliper body 51D opposite to the cylinder portion 55 in the brake disc axis direction. Figure 18 As shown, the first cover portion 111 of the cover member 14D overlaps with the main surface portion 66D of the caliper body 51D in the radial direction and the circumferential direction of the brake disc, and abuts in the axial direction of the brake disc in a surface-contact manner. In addition, at this time, the cover member 14D is arranged so that the second cover portion 112 overlaps with the inclined surface portion 67D of the caliper body 51D in the radial direction and the circumferential direction of the brake disc and faces each other in the axial direction of the brake disc. In addition, at this time, as Figure 17 As shown, one of the pair of protrusions 113D of the cover member 14D abuts against one of the pair of hole opening surface portions 92D of the caliper body 51D in surface contact. Furthermore, at this time, the other of the pair of protrusions 113D of the cover member 14D abuts against the other of the pair of hole opening surface portions 92D of the caliper body 51D in surface contact.

[0264] In this state, one of the pair of fixing members 131 has its threaded shaft portion 133 inserted through the fixing member insertion hole 125 of one of the pair of protrusions 113D of the cover member 14D. This threaded shaft portion 133 then screws into the cover member fixing hole 98 formed in the hole opening surface portion 92D of the caliper body 51D, which the protrusion 113D abuts against. The tapered end surface 137 of the fixing member 131 then abuts the locking hole portion 127 of the fixing member insertion hole 125, pressing and securing the protrusion 113D to the caliper body 51D. In other words, one of the pair of protrusions 113D is clamped between one of the pair of hole opening surfaces 92D of the caliper body 51D and the end surface 137 of the fixing member 131.

[0265] In this state, the threaded shaft portion 133 of the other fixing member 131 of the pair of fixing members 131 is inserted through the fixing member insertion hole 125 of the other of the pair of protrusions 113D of the cover member 14D. This threaded shaft portion 133 then screws into the cover member fixing hole 98 opening in the other of the pair of hole opening surface portions 92D of the caliper body 51D, which the protrusion 113D abuts against. The tapered end surface 137 of the fixing member 131 then abuts the locking hole portion 127 of the fixing member insertion hole 125, pressing and securing the protrusion 113D to the caliper body 51D. In other words, the other of the pair of protrusions 113D is clamped between the other of the pair of hole opening surface portions 92D of the caliper body 51D and the end surface 137 of the other fixing member 131.

[0266] In this manner, the cover member 14D is fixed to the caliper body 51D using the two fixing members 131. In other words, the cover member 14D is fixed to the brake caliper 13D by the fixing members 131 engaging with the cover member fixing holes 98. In further words, the fixing members 131 are fastened to the cover member fixing holes 98, thereby fixing the cover member 14D to the brake caliper 13D.

[0267] like Figure 16 As shown, the cover member 14D fixed to the caliper body 51D by two fixing members 131 covers the pair of outer claws 71, the middle claws 72D and the pair of recesses 81D of the caliper body 51D from the side opposite to the cylinder portion 55 in the brake disc axis direction. Figure 17 As shown, the cover member 14D is fixed to the caliper body 51D of the caliper 13D via a fixing member 131 that engages with the cover member fixing hole 98 , and covers the recessed portion 81D in the disc axial direction.

[0268] like Figure 18 As shown, the first cover portion 111 of the cover member 14D in the fixed state is expanded perpendicularly to the brake disc axis. In other words, the first cover portion 111 is expanded in the brake disc radial direction and the brake disc circumferential direction.

[0269] In the fixed state of the cover member 14D, the second cover portion 112 connected to the first cover portion 111 is positioned radially inward of the brake disc, and the closer it is to the brake pad 18 in the brake disc axial direction. In other words, the second cover portion 112 is connected to the first cover portion 111 and extends so that the closer it is to the brake disc axis in the brake disc radial direction, the smaller the gap between it and the brake pad 18 in the brake disc axial direction.

[0270] The pair of protrusions 113D of the cover member 14D in the fixed state extend from the first cover portion 111 in the direction of the brake disc axis toward the brake pad 18. Furthermore, the pair of protrusions 113D of the cover member 14D in the fixed state are positioned radially outward of the brake disc as they approach the brake pad 18 in the brake disc axis.

[0271] In the fixed state of the cover component 14D, in the axial direction of the brake disc, the gap between the front end of the second cover part 112 on the radial inner side of the brake disc, i.e., the end edge part 121, and the brake pad 18 is set at a position farther away from the brake pad 18 than the imaginary line X5 drawn in the direction extending from the cover component fixing hole 98.

[0272] An imaginary line X5 , which is an extension of the central axis of the fixing member 131 for fixing the cover member 14D, ie, the central axis of the cover member fixing hole 98 of the caliper 13D, intersects the brake pad 18 .

[0273] The cover member 14D in this fixed state has a protrusion 113D that protrudes toward the recess 81D on the side facing the brake pad 18. The protrusion 113D is fixed to the caliper body 51D by a fixing member 131.

[0274] In the fixed state of the cover member 14D, the gap between the front end 121 of the second cover portion 112 on the inner side of the brake disc radial direction and the brake pad 18 is smaller than the diameter of the threaded portion of the threaded shaft portion 133 of the fixing member 131 , i.e., the thread outer diameter.

[0275] In the fixed state, the second cover portion 112 of the cover member 14D extends from the first cover portion 111 in the brake disc axial direction toward the brake pad 18, and covers the fixing member insertion hole 125 and the cover member fixing hole 98 when viewed in the brake disc radial direction. Specifically, in the fixed state, when viewed from the inner side in the brake disc radial direction, the second cover portion 112 covers the entirety of the cover member fixing hole 98 and partially covers the fixing member insertion hole 125. When viewed from the inner side in the brake disc radial direction, the second cover portion 112 covers the entirety of the insertion hole 126.

[0276] The hole opening surface portion 92D of the caliper 13D is inclined so that the closer it is to the brake pad 18 in the disc axis direction, the longer the distance from the disc axis becomes.

[0277] Furthermore, when viewed from the inside in the radial direction of the brake disc, the second cover portion 112 of the cover member 14D in the fixed state covers at least a portion of the tool engagement groove 136 of the fixing member 131. Specifically, when viewed from the inside in the radial direction of the brake disc, the second cover portion 112 of the cover member 14D in the fixed state covers the central portion of the tool engagement groove 136 that is arranged on the central axis of the fixing member 131.

[0278] In the disc brake 10D of the fifth embodiment, the cover member fixing hole 98 of the brake caliper 13D, into which the fixing member 131 engages, is formed on the inner circumference of the recess 81D at an angle relative to the brake disc radial direction. This makes it difficult to engage the fixing member 131 with a tool in the cover member fixing hole 98. Consequently, the disc brake 10D can prevent removal of the cover member 14D while it is mounted on the vehicle.

[0279] The first cover portion 111 of the cover member 14D of the disc brake 10D extends in both the brake disc radial and circumferential directions. The second cover portion 112, connected to the first cover portion 111, extends so that the gap between the cover member 14D and the brake pad 18 decreases in the disc disc axial direction as it approaches the disc disc axis in the radial direction. This makes it difficult for a tool to be inserted into the disc brake 10D through the gap between the cover member 14D and the brake pad 18 and engage with the fixing member 131. Consequently, the disc brake 10D can further suppress removal of the cover member 14D while it is mounted on the vehicle.

[0280] In the disc brake 10D, the gap between the front end (i.e., the end edge 121) of the second cover portion 112, located radially inwardly of the brake disc, and the brake pad 18 is located farther from the brake pad 18 than an imaginary line X5 drawn in the direction in which the cover member fixing hole 98 extends, along the brake disc axis. Consequently, it is difficult to insert a tool into the disc brake 10D through the gap between the cover member 14D and the brake pad 18 and engage the fixing member 131. Consequently, the disc brake 10D can further suppress removal of the cover member 14D while it is mounted on the vehicle.

[0281] In the disc brake 10D, the gap between the front end (i.e., edge 121) of the second cover portion 112 of the cover member 14D, radially inwardly of the brake disc, and the brake pad 18 is smaller than the diameter of the threaded portion of the fixing member 131. Consequently, it is difficult to insert a tool of appropriate size, having a diameter equal to the threaded portion, into the fixing member 131 through the gap between the edge 121 of the cover member 14D and the brake pad 18. Consequently, the disc brake 10D can further suppress removal of the cover member 14D while it is mounted on the vehicle.

[0282] In the disc brake 10D, the hole opening surface 92D for the cover member fixing hole 98 of the brake caliper 13D is located outside the center portion of the recess 81D in the brake disc circumferential direction. This makes it difficult to engage a tool with the fixing member 131 that engages with the cover member fixing hole 98. Consequently, the disc brake 10D can further suppress removal of the cover member 14D while it is mounted on the vehicle.

[0283] The disc brake 10D is configured such that the hole opening surface 92D of the caliper 13D is inclined such that the distance from the disc axis increases as it approaches the brake pad 18 in the disc axis direction. This facilitates machining when forming the cover member fixing hole 98 in the caliper 13D at an angle relative to the disc radial direction.

[0284] The second cover portion 112 of the cover member 14D of the disc brake 10D extends from the first cover portion 111 in the brake disc axial direction toward the brake pad 18. When viewed from the inside in the brake disc radial direction, the second cover portion 112 covers the cover member fixing hole 98 with which the fixing member 131 engages. Therefore, it is difficult to insert a tool into the disc brake 10D through the gap between the cover member 14D and the brake pad 18 to engage with the fixing member 131. Consequently, the disc brake 10D can prevent removal of the cover member 14D while it is mounted on the vehicle.

[0285] It should be noted that in the disc brake 10D of the fifth embodiment, instead of the fixing structure of the cover member 14D to the caliper body 51D based on the cover member fixing hole 98, the fixing member insertion hole 125 and the fixing member 131, a fixing structure based on the cover member fixing hole 98A, the fixing member insertion hole 125A and the fixing member 131A of the second embodiment can also be adopted.

[0286] Industrial applicability

[0287] According to the above-described disc brake, it is possible to suppress detachment of the cover member from the disc brake mounted on the vehicle.

[0288] Description of Reference Numerals

[0289] 10, 10A~10D: Disc brake

[0290] 11: Brake disc

[0291] 12: Install components

[0292] 13, 13A~13D: Brake calipers

[0293] 14, 14A ~ 14D: Cover parts

[0294] 17, 18: Brake pads

[0295] 55: Cylinder

[0296] 56: Bridge

[0297] 61: Cylinder bore

[0298] 62: Pistons

[0299] 71: Outer claw (claw)

[0300] 72, 72D: Middle claw (claw)

[0301] 81, 81B~81D: concave part

[0302] 82: Opening

[0303] 92, 92B, 92C: Bottom part (groove bottom part)

[0304] 92D: Hole opening face

[0305] 98, 98A: Holes for fixing the cover

[0306] 111: First cover

[0307] 112: Second cover

[0308] 113, 113A~113D: protrusion

[0309] 131: Fixing parts (threaded parts, flat head screws)

[0310] 131A: Fixed parts (riveted parts)

[0311] X1~X5: imaginary lines.

Claims

1. A disc brake for braking a vehicle having a brake disc that rotates together with a wheel, characterized in that: have: a mounting member mounted on a non-rotating portion of the vehicle; a brake caliper movably mounted on the mounting member for pressing a pair of brake pads against the brake disc, the brake caliper comprising: a cylinder portion having a cylinder hole in which a piston for moving one of the pair of brake pads is disposed; a bridge portion extending from the cylinder portion across the outer peripheral surface of the brake disc; and a plurality of claw portions formed on the extended front end side of the bridge portion and disposed opposite the cylinder portion; a recessed portion provided between the plurality of claws, having an opening at an inner end in a radial direction relative to the rotation axis of the brake disc and formed opposite to the cylinder hole, wherein the brake caliper has a cover member fixing hole formed on an inner periphery of the recessed portion at an angle relative to the radial direction; A cover member is fixed to the brake caliper by a fixing member engaged with the cover member fixing hole, and covers the recessed portion in the direction of the rotation axis.

2. The disc brake according to claim 1, wherein: The cover component includes: a first cover portion extending in the radial direction; The second cover portion is connected to the first cover portion and extends such that a gap between the second cover portion and the closer brake pad of the pair of brake pads in the direction of the rotation axis decreases as the second cover portion approaches the rotation axis in the radial direction.

3. The disc brake according to claim 2, wherein: In the direction of the rotation axis, the gap between the front end of the second cover portion and the closer brake pad of the pair of brake pads is set at a position farther away from the closer brake pad of the pair of brake pads than an imaginary line drawn in the direction in which the cover member fixing hole extends.

4. The disc brake according to claim 2, wherein: In the cover member, an angle formed between the first cover portion and the second cover portion on a side facing a closer brake pad of the pair of brake pads in the direction of the rotation axis is an obtuse angle.

5. The disc brake according to claim 2, wherein: The radial length of the first cover portion is longer than the radial length of the second cover portion.

6. The disc brake according to claim 2, wherein: The cover member includes a protrusion that protrudes toward the recessed portion on a side opposite to a closer brake pad of the pair of brake pads, and the protrusion is fixed to the brake caliper by the fixing member.

7. The disc brake according to claim 2, wherein: The fixing member is a screw member that is fastened to the cover member fixing hole to fix the cover member to the brake caliper. A gap between a front end of the second cover portion and a closer brake pad of the pair of brake pads in the direction of the rotation axis is smaller than a diameter of the threaded portion of the threaded member.

8. The disc brake according to claim 1, wherein: The cover member includes a first cover portion extending in the radial direction. The cover member fixing hole is inclined toward the first cover portion with respect to the radial direction.

9. The disc brake according to claim 1, wherein: The recessed portion of the brake caliper has a groove bottom portion, which is arranged at a position opposite to the opening portion of the recessed portion in the radial direction, and is provided with a hole for fixing the cover component. The groove bottom portion is inclined in such a manner that the closer it is to the closer brake pad of the pair of brake pads in the direction of the rotation axis, the longer the distance from the rotation axis.

10. The disc brake according to claim 1, wherein The recessed portion of the brake caliper has a hole opening surface portion, which is arranged at a position other than the central portion of the recessed portion in the circumferential direction relative to the rotation axis of the brake disc, and has a hole for fixing the cover component. The hole opening surface portion is inclined in such a manner that the closer it is to the closer brake pad of the pair of brake pads in the direction of the rotation axis, the longer the distance from the rotation axis.

11. The disc brake according to claim 1, wherein The fixing member is a screw member that is fastened to the cover member fixing hole to fix the cover member to the brake caliper.

12. The disc brake according to claim 11, wherein: The threaded component is a grub screw.

13. The disc brake according to claim 1, wherein The fixing member is a rivet member that fixes the cover member to the brake caliper by being riveted into the cover member fixing hole.

14. A disc brake for braking a vehicle having a brake disc that rotates together with a wheel, characterized in that: have: a mounting member mounted on a non-rotating portion of the vehicle; a brake caliper movably mounted on the mounting member for pressing a pair of brake pads against the brake disc, the brake caliper comprising: a cylinder portion having a cylinder hole in which a piston for moving one of the pair of brake pads is disposed; a bridge portion extending from the cylinder portion across the outer peripheral surface of the brake disc; and a plurality of claw portions formed on the extended front end side of the bridge portion and disposed opposite the cylinder portion; a recessed portion provided between the plurality of claws, having an opening at an inner end in a radial direction relative to the rotation axis of the brake disc and formed opposite to the cylinder hole, wherein the brake caliper is provided with a cover member fixing hole on an inner periphery of the recessed portion; A cover member is fixed to the brake caliper by a fixing member engaged with the cover member fixing hole, covering the recessed portion in the direction of the rotation axis, the cover member including a first cover portion and a second cover portion, the first cover portion extending in the radial direction, the second cover portion being connected to the first cover portion, extending in the direction of the rotation axis toward the closer of the pair of brake pads, and covering the cover member fixing hole when viewed from the radial direction.

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