Disc brake and friction pad

Abstract

A disc brake that avoids interference with components around the caliper body and increases the surface area of ​​the protrusions on the back plate of the friction pads, wherein the disc brake (1) comprises a caliper body (3) with actuating parts (3a, 3b) connected by a bridge and a pair of friction pads (4). The bridge has a disc-in-side bridge (3c), a disc-out-side bridge (3d), and an intermediate bridge (3e), a first top wall opening (3f) between the disc-in-side bridge (3c) and the intermediate bridge (3e), and a second top wall opening (3g) between the disc-out-side bridge (3d) and the intermediate bridge (3e). The friction pad (4) has multiple protrusions (4f) on the back plate (4a) on which the pad (4c) is mounted, which are inserted into the first top wall opening (3f) and the second top wall opening (3g), and each protrusion (4g) forms a convex part (4g) that protrudes toward the brake disc (2).

Description

Technical Field

[0001] This invention relates to disc brakes and disc brake friction pads, and more specifically, to disc brakes and disc brake friction pads having a structure for dissipating braking heat to the outside air. Background Technology

[0002] In the past, disc brakes for vehicles have been designed to prevent the working fluid temperature from rising due to the braking heat generated by the friction between the friction pads (friction parts) and the brake disc during braking. In such cases, a plate-shaped protrusion is provided on the back plate of the friction pad, which protrudes outward from the opening on the top wall of the caliper body, so that the braking heat can be dissipated to the outside air through the protrusion (for example, see Patent Document 1).

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: WO2021070892A1 Summary of the Invention

[0006] The problem the invention aims to solve

[0007] However, in the structure of the aforementioned Patent Document 1, when it is desired to increase the surface area of ​​the protrusion in order to increase heat dissipation, the protrusion may interfere with components around the caliper body, such as wheels, due to the change in the shape of the protrusion, thus limiting the increase in surface area.

[0008] Therefore, the object of the present invention is to provide a disc brake and friction pad that can avoid interference with components around the caliper body and can improve cooling performance by increasing the surface area of ​​the friction pad.

[0009] Solution for solving the problem

[0010] To achieve the above objectives, the disc brake of the present invention is characterized by comprising: a caliper body having a top wall opening in a bridge portion spanning the outer periphery of the brake disc; and a pair of friction pads disposed on both sides of the brake disc, the friction pads having a protrusion in a back plate having a friction portion that inserts into the top wall opening, the protrusion having a convex portion that protrudes at least toward the brake disc side.

[0011] In addition, the friction pad of the present invention is characterized in that the friction pad has a friction portion on one side of the back plate, the back plate has a protrusion that protrudes in one direction from the end face adjacent to the side, and the protrusion has a convex portion that protrudes along the thickness direction of the friction pad on at least one side.

[0012] The effects of the invention

[0013] The disc brake and the friction pad of the disc brake according to the present invention can avoid interference with the components around the caliper body and can increase the surface area of ​​the protrusion to improve the cooling effect. Attached Figure Description

[0014] Figure 1 yes Figure 3 Section II.

[0015] Figure 2 This is a front view showing the disc brake according to the first embodiment of the present invention.

[0016] Figure 3 This is a top view of the disc brake.

[0017] Figure 4 This is a front view of the friction pads of the disc brake.

[0018] Figure 5 This is a side view of the friction liner.

[0019] Figure 6 This is a rear view of the friction liner.

[0020] Figure 7 This is a three-dimensional view of the friction liner.

[0021] Figure 8 This is a front view showing the friction pad of the disc brake according to the second embodiment of the present invention.

[0022] Figure 9 This is a side view of the friction liner.

[0023] Figure 10 This is a rear view of the friction liner.

[0024] Figure 11 This is a three-dimensional view of the friction liner.

[0025] Figure 12 yes Figure 14 Sectional view XII-XII.

[0026] Figure 13 This is a front view showing the disc brake according to the third embodiment of the present invention.

[0027] Figure 14 This is a top view of the disc brake.

[0028] Figure 15 This is a top view of the disc brake in operation. Detailed Implementation

[0029] Figures 1 to 7This diagram illustrates a first embodiment of the disc brake of the present invention. Furthermore, arrow A indicates the rotation direction of the brake disc, which rotates integrally with the wheel when the vehicle is moving forward. The disc-out side and disc-in side described below refer to the disc-out side and disc-in side when the vehicle is moving forward.

[0030] The disc brake 1 includes: a brake disc 2 that rotates integrally with the wheel; a piston-opposed caliper body 3 that is mounted on one side of the brake disc 2 to the vehicle body; and a pair of friction pads 4, 4 that are disposed between the working portions 3a, 3b of the caliper body 3 located on both sides of the brake disc 2, across the brake disc 2.

[0031] The caliper body 3 is integrally formed with a pair of working parts 3a and 3b and a bridge portion, which connects the pair of working parts 3a and 3b across the outer periphery of the caliper. The bridge portion has a caliper-entry bridge portion 3c, a caliper-exit bridge portion 3d, and an intermediate bridge portion 3e located between the caliper-entry bridge portion 3c and the caliper-exit bridge portion 3d. A first top wall opening portion 3f is formed between the caliper-entry bridge portion 3c and the intermediate bridge portion 3e, and a second top wall opening portion 3g is formed between the caliper-exit bridge portion 3d and the intermediate bridge portion 3e.

[0032] In each of the working parts 3a and 3b, two cylinder bores 3h are formed in an opposing manner. The two cylinder bores 3h can respectively accommodate the piston 5. A hydraulic chamber (not shown) is formed between each piston 5 and the cylinder bore 3h.

[0033] Mounting bosses 3i and 3i are formed on the disc inlet and disc outlet sides of an action part 3a located on the outer side of the vehicle body, with mounting bolt insertion holes 3j in the disc radius direction formed on each mounting boss 3i. The caliper body 3 is mounted on the vehicle body by inserting mounting bolts (not shown) through each mounting bolt insertion hole 3j and screwing them into the caliper mounting part located on the side of the vehicle body.

[0034] like Figure 1 As shown, each of the actuating parts 3a and 3b has a friction liner receiving part 6 formed on its inner side to accommodate the friction liner 4. The friction liner receiving part 6 includes: a torque bearing surface 6a on the turning-in side, which is formed on the inner side of the caliper body and on the disc turning-in side of the first top wall opening 3f; a torque bearing surface 6b on the turning-out side, which is formed on the inner side of the caliper body and on the disc turning-out side of the second top wall opening 3g; and liner support parts 6c, 6c, which support the friction liner 4 on the inner side in the disc radius direction.

[0035] The friction pad 4 is formed by attaching four pads 4c (friction parts of the present invention) to one side 4b of the back plate 4a. The back plate 4a has a pad mounting part 4d for mounting the pads 4c on one side 4b, and on the end face 4e adjacent to the side 4b in the radial direction of the disk, eight protrusions 4f protruding outward in the radial direction of the disk are integrally formed with the back plate 4a.

[0036] Four protrusions 4f are formed on the disc-in side of the backplate 4a and four protrusions are formed on the disc-out side. The four protrusions 4f on the disc-in side are inserted into the first top wall opening 3f, and the four protrusions 4f on the disc-out side are inserted into the second top wall opening 3g. In addition, on one side 4b of each protrusion 4f, a convex portion 4g is integrally formed with the protrusion 4f, protruding towards the brake disc 2 (protruding along the thickness direction of the friction pad 4).

[0037] Furthermore, on the end face 4h of the back plate 4a, which is adjacent to one side 4b and is inside the disk radius direction, six inner protrusions 4i protruding in the disk radius direction are integrally formed with the back plate 4a. The positions of the inner protrusions 4i and the protrusions 4f are approximately corresponding, with three protrusions formed on the disk rotation-in side and three protrusions formed on the disk rotation-out side.

[0038] Furthermore, in the caliper body 3, corresponding to the protruding position of the protrusion 4f, four first caliper protrusions 3k (caliper protrusions of the present invention) protruding outwards from the first top wall opening 3f and the second top wall opening 3g, extending throughout one working part 3a, are provided. Similarly, four first caliper protrusions 3k (caliper protrusions of the present invention) protruding outwards from the first top wall opening 3f and the second top wall opening 3g, extending throughout another working part 3b, are also provided. Moreover, corresponding to the protruding position of the inner protrusion 4i in the disc radius direction, three second caliper protrusions 3n protruding outwards from the inner disc radius directions 3m and 3m of each working part 3a and 3b, respectively, are formed on the disc rotation exit side and the disc rotation in side.

[0039] By forming the disc brake 1 of this embodiment as described above, the braking heat generated during braking due to the sliding contact between the friction pad 4 and the brake disc 2 can be dissipated to the outside air from the first top wall opening 3f and the second top wall opening 3g via multiple protrusions 4f protruding outwards from the caliper body 3. Furthermore, by providing protrusions 4g in each protrusion 4f, the surface area of ​​the friction pad 4 can be increased while suppressing the protrusion amount of the protrusions 4f, thereby improving the cooling effect. Moreover, since the back plate 4a, the protrusions 4f, and the protrusions 4g are integrally formed, the heat transfer efficiency is good, and the number of components is not increased. In addition, by providing an inward protrusion 4i in the disc radius direction on the end face 4h of the back plate 4a at the end face 4h ...

[0040] Furthermore, since the protrusion 4g protrudes from the protrusion 4f toward the brake disc 2, it will not interfere with the components surrounding the caliper body. Moreover, by providing the liner mounting portion 4d on one side 4b of the backplate 4a and placing the protrusion 4g on the side 4b of the protrusion 4f, the protrusion 4f and the protrusion 4g will not affect the liner 4c bonding process when applying it to the backplate 4a.

[0041] Furthermore, by forming a first caliper protrusion 3k corresponding to the protrusion 4f on the caliper body 3 and a second caliper protrusion 3n corresponding to the inner protrusion 4i in the disc radius direction, the surface area of ​​the caliper body 3 can be increased, allowing the braking heat transferred to the caliper body 3 to dissipate effectively. Moreover, since the first caliper protrusion 3k is formed corresponding to the protruding position of the protrusion 4f, and the second caliper protrusion 3n is formed corresponding to the protruding position of the inner protrusion 4i in the disc radius direction, the aesthetics are improved, enhancing the design of the disc brake 1.

[0042] Furthermore, in the above embodiments, the back plate is provided with 8 protrusions, but the number of protrusions is arbitrary. Moreover, the protrusions are not limited to being provided on the disc-entry side and disc-exit side of the back plate, but may be provided only on either the disc-entry side or the disc-exit side.

[0043] Figures 8 to 15 Other embodiments of the present invention are indicated by the same reference numerals for the parts that represent the same constituent elements as in the first embodiment, and detailed descriptions thereof are omitted.

[0044] Figures 8 to 11This refers to the friction pad 11 of the disc brake according to the second embodiment of the present invention. The friction pad 11 has a pair of protrusions 11a, 11a integrally formed with the back plate 4a on the disc-entry side and disc-exit side of the end face 4e of the back plate 4a, respectively, protruding outward in the disc radial direction. The protrusion 11a on the disc-entry side is inserted into the first top wall opening 3f, and the protrusion 11a on the disc-exit side is inserted into the second top wall opening 3g.

[0045] On one side 4b of each protrusion 11a, four protrusions 11b are integrally formed with the protrusion 11a and protrude toward the brake disc 2. The protrusions 11b extend along the radial direction of the disc, and a groove 11c in the radial direction of the disc is provided between adjacent protrusions 11b.

[0046] Furthermore, in the above embodiment, protrusions are provided on both the disc-entry and disc-exit sides of the back plate, but protrusions may also be provided on only one side of the disc-entry and disc-exit sides. Additionally, the number of protrusions provided on the protrusions is arbitrary; for example, a protrusion with a disc circumferential length approximately the same as the disc circumferential length of the protrusion may be provided.

[0047] Figures 12 to 15 This refers to the disc brake 21 according to the third embodiment of the present invention. The disc brake 21 has a pair of friction pads 22 and 23 on both sides of the brake disc 2.

[0048] A friction pad 22 has a pad 4c mounted on one side 4b of the back plate 4a. Furthermore, on the end face 4e adjacent to the side 4b in the outer direction of the disk radius, six protrusions 22a are integrally formed with the back plate 4a, each protruding outward in the disk radius direction.

[0049] Three protrusions 22a are formed on the disc-in side of the backplate 4a and three are formed on the disc-out side. The three protrusions 22a on the disc-in side are inserted into the first top wall opening 3f, and the three protrusions 22a on the disc-out side are inserted into the second top wall opening 3g. In addition, on one side 4b of each protrusion 22a, a convex portion 22b protruding toward the brake disc 2 is formed integrally with the protrusion 22a.

[0050] The other friction pad 23 is similar to the friction pad 22, with a pad installed on one side of the back plate, and on the end face of the disk radius direction adjacent to the side plate, six protrusions 23a are integrally formed with the back plate, protruding outward in the disk radius direction.

[0051] Similar to the protrusion 22a of a friction liner, three protrusions 23a are formed on the disc-in side of the backplate and three protrusions 23a are formed on the disc-out side. The three protrusions 23a on the disc-in side are inserted into the first top wall opening 3f, and the three protrusions 23a on the disc-out side are inserted into the second top wall opening 3g. Furthermore, on one side of each protrusion 23a, a convex portion 23b protruding towards the brake disc 2 is integrally formed with the protrusion 23a.

[0052] like Figures 13 to 15 As shown, the protrusions 22b and 23b of the two friction pads 22 and 23 are formed such that when the friction pads 22 and 23 are assembled into the caliper body 3, the protrusion 22a (protrusion 22b) of one friction pad 22 and the protrusion 23a (protrusion 23b) of the other friction pad 23 are alternately arranged in the circumferential direction of the brake disc 2.

[0053] Therefore, as Figure 15 As shown, even when the disc brake 21 is in operation, the friction pads 22 and 23 on both sides approach each other towards the brake disc 2, the opposing protrusions 22b and 23b will not interfere with each other. As a result, the length of the protrusions 22b and 23b in the disc axial direction (thickness direction of the friction pads) can be longer, which can improve the cooling effect.

[0054] Furthermore, the disc brake of the present invention is not limited to the embodiments described above. The number of openings formed on the top wall of the caliper body is arbitrary, and the protrusions can be appropriately formed according to the position of the openings on the top wall. In addition, the caliper body is not limited to a single-piece structure, but can also be a split structure.

[0055] Furthermore, the protruding portion of the friction pad of the present invention may have a protrusion protruding towards the brake disc side, in addition to a protrusion protruding towards the opposite side of the brake disc. Additionally, the friction pad may not have an inward protrusion in the disc radius direction, and the protrusions and protrusions may not be integrally formed with the backing plate. Furthermore, the friction pad of the present invention is not limited to being formed by bonding a pad to the backing plate; it may also be formed by sintering a pad to the backing plate. Furthermore, it is not limited to sintering materials or resin materials; a friction pad may also be formed integrally with the friction portion and the backing plate using carbon materials or the like.

[0056] Explanation of reference numerals in the attached figures

[0057] 1. Disc brake; 2. Brake disc; 3. Caliper body; 3a, 3b. Actuating part; 3c. Disc-in side axle; 3d. Disc-out side axle; 3e. Intermediate axle; 3f. First top wall opening; 3g. Second top wall opening; 3h. Cylinder bore; 3i. Mounting boss; 3j. Mounting bolt insertion hole; 3k. First caliper protrusion; 3m. Inner side of disc in the radial direction; 3n. Second caliper protrusion; 4. Friction pad; 4a. Backing plate; 4b. One side; 4c. Liner (friction part) ); 4d, Liner mounting part; 4e, End face; 4f, Protrusion; 4g, Raised part; 4h, End face; 4i, Protrusion on the inner side in the direction of disc radius; 5, Piston; 6, Friction liner receiving part; 6a, Torque bearing surface on the turning-in side; 6b, Torque bearing surface on the turning-out side; 6c, Liner support part; 11, Friction liner; 11a, Protrusion; 11b, Raised part; 11c, Groove; 21, Disc brake; 22, 23, Friction liner; 22a, 23a, Protrusion; 22b, 23b, Raised part.

Claims

1. A disc brake comprising: a caliper body having a top wall opening in a bridge portion spanning the outer periphery of a brake disc; and a pair of friction pads respectively disposed on both sides of the brake disc, the friction pads having protrusions that insert into the top wall openings in a back plate having friction portions, the disc brake being characterized in that... The protrusion has a convex portion that protrudes at least toward the brake disc side.

2. The disc brake according to claim 1, characterized in that, The disc brake is provided with multiple protrusions.

3. The disc brake according to claim 1, characterized in that, The disc brake is provided with a plurality of the aforementioned protrusions.

4. The disc brake according to claim 3, characterized in that, The protrusions formed on the pair of friction pads protrude toward the brake disc, and the protrusions of one friction pad and the protrusions of the other friction pad are arranged alternately in the circumferential direction of the brake disc.

5. The disc brake according to claim 1, characterized in that, The back plate of the friction liner has an inward protrusion in the direction of the disk radius.

6. The disc brake according to any one of claims 1 to 5, characterized in that, In the caliper body, a caliper protrusion is formed corresponding to the protruding position of the protrusion, protruding outward from the caliper body.

7. A friction liner for a disc brake, wherein the friction liner has a friction portion on one side of a backing plate, characterized in that... The back plate has a protrusion that extends in one direction from the end face adjacent to the side face. The protrusion has a convex portion that protrudes along the thickness direction of the friction pad on at least one side.

8. The friction pad of the disc brake according to claim 7, characterized in that, The friction liner is provided with a plurality of the aforementioned protrusions.

9. The friction pad of the disc brake according to claim 7 or 8, characterized in that, The friction liner is provided with a plurality of the aforementioned protrusions.

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