JP2018054012A - Brake device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brake device capable of attenuating transmitted vibration by a simple structure.SOLUTION: A brake device 10 is provided at an axle J for supporting a disc rotor 12 and a brake drum 15 in a rotatable manner, and has a caliper bracket 13 and a backing plate 16 laminated in an axial direction D of the axle J and fastened with each other by a plurality of bolts B. At the caliper bracket 13 out of the caliper bracket 13 and the backing plate 16, a recess 13d which is recessed in the axial direction D of the axle J with respect to an opposing surface 13c opposing to the backing plate 16 is provided. By providing the recess 13d in this way, a space is formed between the caliper bracket 13 and the backing plate 16. Since the backing plate 16 transmits the vibration to air inside the space, vibration energy of the vibration is consumed, and the vibration attenuates.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a brake device.

  Conventionally, for example, a brake device disclosed in Patent Document 1 below is known. In this conventional brake device, a dust cover that covers one surface of the disk rotor, an attachment member that has an attachment surface for attaching the dust cover, and a state in which the central portion of the dust cover is in surface contact with the attachment surface side of the attachment member. And a fastening member for fastening the dust cover to the mounting surface in a pressure contact state. In this conventional brake device, an inclined surface that is separated from the dust cover toward the outer peripheral edge and smoothly continues to the mounting surface is provided with respect to the outer peripheral edge of the mounting surface.

JP 2012-127363 A

  By the way, in a brake device, the vibration transmitted via a wheel from a road surface at the time of driving | running | working of a vehicle and the vibration when a friction member is pressed to a friction sliding surface and a braking force generate | occur | produces arise. When these vibrations are transmitted to a plate-like plate member provided in the brake device, the plate member may vibrate with an excessively large amplitude if it resonates at the natural frequency of the plate member. In the conventional brake device described above, the dust cover is easily vibrated by providing an inclined surface with respect to the peripheral portion of the mounting member. When the dust cover vibrates, contact with the peripheral portion of the mounting member of the vibrating dust cover The stress concentration in the part is relaxed.

  However, in the conventional brake device described above, when the dust cover resonates at the natural frequency due to the transmitted vibration, the attachment member does not restrain the dust cover, so that the dust cover vibrates with a large amplitude. As a result, the dust cover is easily damaged. Therefore, in the brake device, it is desired to reduce (attenuate) vibration transmitted to the brake device and vibration generated with braking.

  The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide a brake device that can attenuate vibrations transmitted during traveling or braking with a simple structure.

  In order to solve the above-mentioned problem, the invention of the brake device according to claim 1 is a brake device that obtains a braking force by pressing the friction member against the friction sliding surface of the wheel-side rotation member. The first plate member of the first plate member and the second plate member provided on the axle that is rotatably supported and stacked in the axial direction of the axle and fastened to each other by a plurality of fastening members. A concave portion that is recessed in the axial direction of the axle is provided on an opposing surface that faces the other plate member of the plate member and the second plate member.

  According to this, the opposing surface which opposes the other board member with respect to one board member among the 1st board member laminated | stacked on the axial direction of an axle shaft and fastened mutually in a brake device. A recess can be provided on the surface. Thereby, the space which reduces a vibration can be formed by the recessed part provided in one board member, and the other board member. By forming the space by providing the recesses in this way, the vibration transmitted to the first plate member and the second plate member can be transmitted to the air in the space, and the vibration energy of the transmitted vibration is effective. Can be reduced. As a result, vibrations of the first plate member and the second plate member can be attenuated.

1 is a schematic overall view of a brake device according to the present invention. It is a figure for demonstrating the caliper bracket of FIG. 1, a backing plate, and a dust cover. It is a figure for demonstrating the caliper bracket of FIG. 1, and the flange part of a unit bearing. It is a figure for demonstrating the recessed part provided in the caliper bracket of FIG. It is sectional drawing in 4B-4B of the caliper bracket of FIG. 4A. It is sectional drawing for demonstrating damping | damping of the vibration in the state which fastened the caliper bracket, the backing plate, the flange part, and the dust cover. It is sectional drawing which concerns on the 1st modification of 1st embodiment, and shows the case where a recessed part is provided in the backing plate. It is sectional drawing which concerns on the 2nd modification of 1st embodiment, and shows the case where a recessed part is provided in the flange part. It is sectional drawing which shows the case where a damping material is provided in the recessed part provided in the flange part of FIG. It is sectional drawing which shows the case where a recessed part is each provided in the opposing surface which opposes the backing plate of a caliper bracket, and the opposing surface which opposes the flange part of a caliper bracket according to the 3rd modification of 1st embodiment. It is sectional drawing which concerns on the 4th modification of 1st embodiment, and shows the case where a recessed part is provided in a flange part while providing a recessed part in a caliper bracket.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that, in the following embodiments and modifications, the same or equivalent parts are denoted by the same reference numerals in the drawings. Each figure used for explanation is a conceptual diagram, and the shape of each part may not necessarily be exact.

  As shown in FIG. 1, the brake device 10 of this embodiment is a drum-in-hat type brake device. The brake device 10 is provided on the rear wheel side of the vehicle, for example, and includes a disk 11. The disk 11 is fixed to a hub H assembled to the axle shaft J, and is rotatably supported together with the axle shaft J and the hub H. The disk 11 has a disk rotor 12 as a disk-shaped wheel side rotating member constituting a disk brake mechanism. A brake caliper 14 that is supported by the caliper bracket 13 and is non-rotatable with respect to the disk rotor 12 is provided on the outer circumferential surface of the disk rotor 12 in the radial direction. Further, a friction sliding surface 12a that frictionally engages with a brake pad 14a as a friction member attached so as not to be relatively displaceable with respect to the brake caliper 14 is provided on the outer circumferential surface of the disk rotor 12 in the radial direction. Yes.

  A brake drum 15 serving as a bottomed cylindrical wheel-side rotating member that forms a drum brake mechanism and opens toward the vehicle body (not shown) in the axial direction D of the axle J is formed at the center of the disc rotor 12. Is provided. The drum brake mechanism in the brake device 10 functions as a parking brake that is activated when the vehicle is parked. On the inner peripheral surface of the brake drum 15, there is a friction sliding surface that frictionally engages with a brake shoe 17 as a friction member that is fixed to the backing plate 16 that is laminated on the caliper bracket 13 in the axial direction D of the axle J so as not to rotate. 15a is provided. The brake shoe 17 is pressed against the friction sliding surface 15a of the brake drum 15 in accordance with the parking brake operation and is frictionally engaged.

  As a result, the brake device 10 obtains a braking force by pressing a brake pad 14a as a friction member supported non-rotatably by the brake caliper 14 to a friction sliding surface 12a of a disk rotor 12 as a wheel side rotation member. It has a brake mechanism. Also, the brake device 10 is a drum brake that obtains a braking force by pressing a brake shoe 17 as a friction member supported non-rotatably on the backing plate 16 against a friction sliding surface 15a of a brake drum 15 as a wheel side rotation member. It has a mechanism. The brake device 10 includes a hat-shaped disc 11 in which a disc rotor 12 and a brake drum 15 that are rotatably supported on an axle J (hub H) are integrally formed. In addition, since the detailed structure and detailed operation | movement itself of the brake device 10 are not related to this invention, the description is abbreviate | omitted.

  The brake device 10 includes a caliper bracket 13 and a backing plate 16. Further, the brake device 10 includes a unit bearing 18 that supports the caliper bracket 13 and the backing plate 16 in a non-rotatable manner with respect to the hub H constituting the axle shaft J. In the unit bearing 18, the inner race 18 a is connected to the hub H (axle J), and the outer race 18 b is fitted to the caliper bracket 13 and the backing plate 16. Further, the outer race 18b of the unit bearing 18 has, for example, a flange portion 18c fixed to the carrier N that is a non-rotating member provided on the vehicle body side. The flange portion 18 c is laminated on the caliper bracket 13 in the axial direction D of the axle shaft J. As shown in FIGS. 1 and 2, the caliper bracket 13 and the backing plate 16 are each fitted with the outer peripheral surface of the outer race 18b (so-called inlay) so as to fit in the through holes 13a. And the through-hole 16a is provided.

  Further, as shown in FIGS. 1 to 3, the caliper bracket 13, the backing plate 16, and the flange portion 18 c have four through holes 13 b through which, for example, four bolts B are inserted, as a plurality of fastening members. A hole 16b and a through hole 18c1 are provided. As a result, the caliper bracket 13, the backing plate 16, and the flange portion 18c (unit bearing 18) have the bolts B inserted into the four through holes 13b, the through holes 16b, and the through holes 18c1, respectively, as shown in FIG. It is fastened integrally with the rear nut. As a result, the caliper bracket 13, the backing plate 16, and the flange portion 18 c are not rotatable with respect to the hub H (axle J), that is, the disc rotor 12 and the brake drum 15.

  In the present embodiment, the first plate member is the caliper bracket 13 and the second plate member is the backing plate 16. Then, the caliper bracket 13 which is one of the caliper bracket 13 and the backing plate 16 has a caliper bracket 13 in the axial direction D of the axle J with respect to the facing surface 13c facing the backing plate 16 as shown in FIG. 4A. A recessed portion 13d that is recessed is provided. The recessed portion 13d is surrounded by a region A (shown by a broken line in FIG. 4A) including a bolt fastening seat surface B1 (see FIG. 3) of a plurality of bolts B inserted through four through holes 13b provided in the caliper bracket 13. It is provided inside the area A). Specifically, as shown in FIGS. 4A and 4B, the recess 13d is provided so as to include a bolt fastening seat surface B1 around the through hole 13a (that is, the spigot) and around the through hole 13b.

  Accordingly, as shown in FIG. 3, when the flange portion 18c is pressed against the caliper bracket 13 by the bolt fastening seat surface B1 when the bolt B is tightened, and the caliper bracket 13 is pressed against the backing plate 16, the caliper The bracket 13 contacts the backing plate 16 with a necessary and sufficient contact area. Specifically, when the caliper bracket 13 provided with the recess 13d is fastened by the bolt B, the caliper bracket 13 contacts the backing plate 16 in a region outside the region A including the bolt fastening seat surface B1. That is, the caliper bracket 13 is not in contact with the backing plate 16 on the entire surface, but on the outer peripheral surface.

  Further, as shown in FIG. 4B, the depth of the recess 13d in the axial direction D of the axle J is not deformed by the tightening force by the bolt B, and the caliper bracket 13 supports the brake caliper 14. It is determined to have a dynamic strength. Specifically, the depth is determined to be smaller than half of the thickness dimension of the plate-like caliper bracket 13. Thus, when the area | region in which the recessed part 13d is provided, and the depth of the recessed part 13d is determined by the bolt B, the caliper bracket 13 does not produce relative displacement (backlash) with respect to the backing plate 16. Laminated and fastened.

  In the brake device 10, a concave portion 13 d is provided in the caliper bracket 13, and the flange portion 18 c, the caliper bracket 13, and the backing plate 16 are laminated in this order in the axial direction D of the axle shaft J and fastened by a bolt B. As shown in FIG. 5, a plate-shaped dust cover 19 that covers a part of the disk rotor 12 is disposed between the caliper bracket 13 that is the first plate member and the backing plate 16 that is the second plate member. Is pinched.

  By the way, as shown in FIG. 5, the concave portion 13d is formed between the caliper bracket 13 that is a rigid body, the backing plate 16 that is a rigid body, and the outer race 18b that is a rigid body when the caliper bracket 13 and the backing plate 16 are fastened. To form a space. Thus, by providing the recess 13d to form a space, when vibration is transmitted to the caliper bracket 13, the backing plate 16, and the flange portion 18c, the transmitted vibration is attenuated by vibrating the air in the space. Is done. Specifically, as shown in FIG. 5, the thickness of the backing plate 16 is smaller than the thickness of the caliper bracket 13, so that the air in the space is vibrated by the transmitted vibration. The air in the space consumes vibration energy of the backing plate 16 by resonating with the vibration of the backing plate 16. That is, the space formed by providing the recess 13d exhibits the function of a so-called resonator.

  The backing plate 16 is fastened by a bolt B so as to be integrated with the caliper bracket 13 and the flange portion 18c. Accordingly, the vibration (vibration energy) of the caliper bracket 13 and the flange portion 18c is transmitted to the backing plate 16, and the vibration energy is consumed in the backing plate 16, so that the entire caliper bracket 13, the backing plate 16 and the flange portion 18c are Vibration energy is consumed. As a result, the vibration transmitted to the caliper bracket 13, the backing plate 16, and the flange portion 18c is attenuated.

  The dust cover 19 is sandwiched between the caliper bracket 13 and the backing plate 16. As described above, the vibration transmitted to the dust cover 19 is also damped by the vibration of the caliper bracket 13, the backing plate 16 and the flange portion 18c being damped. And since the vibration of the dust cover 19 is attenuated, the dust cover 19 is prevented from vibrating with a large amplitude.

  As can be understood from the above description, the brake device 10 of the present embodiment is a brake caliper that supports the disc rotor 12 as a wheel side rotating member and the brake pad 14a as a friction member so as not to rotate with respect to the disc rotor 12. 14 and a drum brake mechanism including a backing plate 16 that supports a brake drum 15 as a wheel-side rotating member and a brake shoe 17 as a friction member so as not to rotate with respect to the brake drum 15. And the disc rotor 12 and the brake drum 15 are integrally formed, and the brake pad 14a is pressed against the friction sliding surface 12a of the disc rotor 12 to obtain a braking force and the friction of the brake drum 15 Brake by pressing the brake shoe 17 against the sliding surface 15a A braking device obtained.

  In the brake device 10 of the present embodiment, the disc rotor 12 and the brake drum 15 are provided on an axle J that rotatably supports the first rotor shaft, and are stacked in the axial direction D of the axle shaft J and are bolted as a plurality of fastening members B. The plate member and the second plate member are fastened together. The first plate member is the caliper bracket 13 among the caliper bracket 13, the backing plate 16, and the flange portion 18 c of the unit bearing 18, and the second plate member is the caliper bracket 13, the backing plate 16, and the unit bearing 18. This is the backing plate 16 of the flange portion 18c. In the brake device 10 of the present embodiment, the caliper bracket 13 that is one plate member of the caliper bracket 13 and the backing plate 16 has an axle with respect to the facing surface 13c that faces the backing plate 16 that is the other plate member. A recess 13d that is recessed in the axial direction D of J is provided.

  According to this, the recessed part 13d can be provided in the opposing surface 13c which opposes the backing plate 16 with respect to the caliper bracket 13 laminated | stacked on the axial direction D of the axle shaft J in the brake device 10, and fastened mutually. Thereby, a space for reducing vibration can be formed by the recess 13 d provided in the caliper bracket 13 and the backing plate 16. This space can act as a resonance chamber (resonator) that damps vibration by consuming vibration energy of vibration by resonating with air. By making the space formed by providing the recess 13 d as a resonance chamber in this way, the vibration energy of the vibration transmitted to the caliper bracket 13 and the backing plate 16 and the flange portion 18 c laminated on the caliper bracket 13 is effective. Can be reduced. As a result, the vibration of the caliper bracket 13 and the backing plate 16 and the flange portion 18c stacked on the caliper bracket 13 can be damped well.

  Incidentally, the caliper bracket 13 supports the brake caliper 14. The brake caliper 14 vibrates when the brake pad 14a is pressed against the friction sliding surface 12a of the disk rotor 12 to generate a braking force. This vibration of the brake caliper 14 may promote, for example, an abnormal noise (so-called brake squeal) during braking. Even when such vibration of the brake caliper 14 is transmitted to the caliper bracket 13, the vibration energy transmitted by the space formed by providing the recess 13d can be consumed to attenuate the vibration. Therefore, in the brake device 10, it is possible to reduce abnormal noise generated during braking.

  In this case, the caliper bracket 13 and the backing plate 16 are each formed with a plurality of through holes 13b and through holes 16b through which the plurality of bolts B are inserted, and the recess 13d provided in the caliper bracket 13 has a plurality of through holes. 13 b and the through hole 16 b are provided inside the region A including the bolt fastening seating surface B1 of the bolt B as a plurality of fastening members inserted through the through hole 16 b.

  The thickness of the backing plate 16 is smaller than the thickness of the caliper bracket 13, and the backing plate 16 is formed with a through-hole 16 a that fits with the outer race 18 b of the unit bearing 18 (as an inlay). For this reason, the backing plate 16 is likely to be deformed particularly by processing for providing the through holes 16a and the through holes 16b, and the surface that contacts the caliper bracket 13 at the time of fastening is likely to be uneven. When the opposing surface 13c of the caliper bracket 13 is brought into contact with the entire surface of the backing plate 16 having such irregularities (that is, without providing the concave portion 13d) and fastened, the friction caused by the contact is reduced. As a result, the caliper bracket 13 is displaced relative to the backing plate 16 (raises), which may cause unnecessary vibration.

  On the other hand, the caliper bracket 13 fastened by the bolt B inserted through the through hole 13b is provided in the region outside the region A with respect to the backing plate 16 by providing the recess 13d inside the region A of the caliper bracket 13. Contact. That is, since the concave portion 13d of the caliper bracket 13 can avoid (relieve) the unevenness of the backing plate 16, the facing surface 13c of the caliper bracket 13 is separated from the backing plate 16 (so-called floating occurs). Can be prevented. Further, by providing the caliper bracket 13 with the recess 13d, the contact area where the facing surface 13c of the caliper bracket 13 and the backing plate 16 are in contact with each other is smaller than when the entire surface of the facing surface 13c is contacted. Thereby, the force (pressure) per unit area on the contact surface between the facing surface 13 c of the caliper bracket 13 and the backing plate 16 when fastened by the bolt B is increased.

  As a result, the contact state between the caliper bracket 13 and the backing plate 16 can be kept good. Therefore, for example, it is possible to prevent the rattling that the caliper bracket 13 is displaced relative to the backing plate 16.

  Further, by preventing the caliper bracket 13 from rattling, the natural frequency of the caliper bracket 13 can be stabilized. Here, the natural frequency of the caliper bracket 13 and the brake caliper 14 leads to abnormal noise (brake squeal) generated during braking, that is, vibration in a low frequency region. Therefore, in addition to effectively attenuating the vibration transmitted by the recess 13d, the recess 13d prevents the caliper bracket 13 from rattling, thereby stabilizing the natural frequency of the caliper bracket 13 and generating brake noise. It is also possible to prevent (suppress) effectively.

  In these cases, the first plate member and the second plate member are stacked on the backing plate 16 and the backing plate 16 in the axial direction D of the axle J so that the brake caliper 14 cannot rotate with respect to the disc rotor 12. A carrier as a non-rotating member that supports the caliper bracket 13 and a unit bearing 18 that is stacked on the caliper bracket 13 in the axial direction D of the axle shaft J and supports the backing plate 16 and the caliper bracket 13 so as not to rotate with respect to the axle shaft J. Two of the flange portions 18c fixed to N can be used.

  According to this, it is possible to select and determine the first plate member and the second plate member from the plate members to which vibrations generated during traveling and braking of the vehicle are easily transmitted. Specifically, in the brake device 10, the caliper bracket 13 and the backing plate 16 are selected as two plate members to which vibration is easily transmitted. The vibration can be effectively damped by providing the concave portion 13d on the facing surface 13c of the caliper bracket 13 which is one of the caliper bracket 13 and the backing plate 16. Further, the caliper bracket 13 needs to have a large plate thickness in terms of function. For this reason, compared with the case where a recessed part is provided in the thin backing plate 16, the recessed part 13d can be provided easily. Thereby, the manufacturing cost of the brake device 10 can be reduced.

  In these cases, a dust cover 19 is provided which is sandwiched between the caliper bracket 13 and the backing plate 16 and covers a part of the disk rotor 12.

  According to this, since the dust cover 19 is sandwiched between the caliper bracket 13 and the backing plate 16 where the transmitted vibration is attenuated, the vibration transmitted to the dust cover 19 is also attenuated. Thereby, it can suppress that the dust cover 19 resonates with a natural frequency. Further, since the caliper bracket 13 holds the dust cover 19 together with the backing plate 16 outside the area A, the dust cover 19 can be restrained to suppress vibration. In this case, since the vibration transmitted to the dust cover 19 is attenuated, for example, stress concentration at the contact portion of the dust cover 19 with the outer peripheral end of the caliper bracket 13 is effectively reduced.

<First Modification of Embodiment>
In the above embodiment, the caliper bracket 13 is provided with the recess 13 d that is recessed in the axial direction D of the axle J. Instead of this, as shown in FIG. 6, a recess 16 d that is recessed in the axial direction D of the axle J is formed on the facing surface 16 c that faces the caliper bracket 13 that is stacked in the axial direction D of the axle J with respect to the backing plate 16. It is also possible to provide it. Also in this case, by providing the recess 16d, a space is formed between the caliper bracket 13, the backing plate 16, and the outer race 18b, so that the same effect as in the above embodiment can be expected.

<Second Modification of Embodiment>
In the above embodiment, the caliper bracket 13 is provided with the recess 13 d that is recessed in the axial direction D of the axle J. Instead, as shown in FIG. 7, a recess 18 e that is recessed in the axial direction D of the axle J is formed on the facing surface 18 d that faces the caliper bracket 13 stacked in the axial direction D of the axle J with respect to the flange portion 18 c. It is also possible to provide it. In this case, a space is formed between the caliper bracket 13, the flange portion 18c, and the outer race 18b by providing the recess 18e. In this case, the plate thickness of the portion provided with the concave portion 18e of the flange portion 18c is reduced, and this portion transmits vibration to the air in the space. As a result, as in the case of the above embodiment, the air in the space vibrates and consumes the vibration energy of the vibration transmitted to the flange portion 18c, so the caliper bracket 13, the backing plate 16 and the flange portion 18c as a whole. Vibration is damped. Therefore, the same effect as in the above embodiment can be expected.

  In this case, as shown in FIG. 8, a damping material G that exhibits a damping effect, such as a rubber material or a silicon material, can be accommodated in the space formed by providing the recess 18e. In this way, by accommodating the damping material G in the space, the damping material G can efficiently consume the vibration energy of the transmitted vibration, so that a higher damping effect can be obtained. Therefore, the same effect as in the above embodiment can be expected.

<Third Modification of Embodiment>
In the embodiment described above, the recess 13d is provided only on the facing surface 13c that faces the backing plate 16. In addition, as shown in FIG. 9, the caliper bracket 13 is provided with a recess 13d1 that is recessed in the axial direction D of the axle J on the facing surface 13c1 that faces the backing plate 16, and is opposed to the flange portion 18c. It is also possible to provide a recess 13d2 that is recessed in the axial direction D of the axle J on the surface 13c2.

  In this case, a space is formed between the caliper bracket 13, the backing plate 16 and the outer race 18b by providing the concave portion 13d1, and between the caliper bracket 13, the flange portion 18c and the outer race 18b by providing the concave portion 13d2. A space is formed. In this case, vibration energy of vibration is consumed in the backing plate 16. In addition to this, for example, vibration energy is consumed by transmitting vibration to the air in the space in which the concave portion 13d1 and the concave portion 13d2 of the caliper bracket 13 are formed. As a result, the vibration transmitted to the caliper bracket 13, the backing plate 16, and the flange portion 18c can be damped, so that the same effect as in the above embodiment can be obtained.

<Fourth Modification of Embodiment>
In the above embodiment, the caliper bracket 13 is provided with the recess 13d. In this case, in addition to providing the caliper bracket 13 with the concave portion 13d, as shown in FIG. 10, a concave portion 18e recessed in the axial direction D of the axle shaft J is provided on the facing surface 18d of the flange portion 18c facing the caliper bracket 13. Is also possible. Also in this case, as in the case of the above embodiment, the vibration energy can be consumed and the vibration can be damped, so that the same effect as in the above embodiment can be obtained.

  In carrying out the present invention, the present invention is not limited to the above embodiment, and various modifications can be adopted without departing from the object of the present invention.

  For example, in the above embodiment, the brake device 10 is a drum-in-hat type brake device. In this case, the brake device 10 may be a disc brake device. When the brake device 10 is a disc brake device, the first plate member and the second plate member may be two of plate members such as a knuckle flange, a caliper bracket, and a dust cover, for example. . Further, the brake device 10 may be a drum brake device. When the brake device 10 is a drum brake device, the first plate member and the second plate member are, for example, two of plate members such as a carrier flange portion, a unit bearing flange portion, and a backing plate. Good to have. Also in the case of such a disc brake device and a drum brake device, the opposite of the other plate member of one of the first plate member and the second plate member stacked in the axial direction of the axle. By providing the surface with a recess that is recessed in the axial direction of the axle, the same effects as in the above-described embodiment and the above-described embodiments can be obtained.

DESCRIPTION OF SYMBOLS 10 ... Brake device, 11 ... Disc, 12 ... Disc rotor (wheel side rotation member), 12a ... Friction sliding surface, 13 ... Caliper bracket, 13a ... Through-hole, 13b ... Through-hole, 13c ... Opposing surface, 13c1 ... Opposing Surface, 13c2 ... opposing surface, 13d ... recess, 13d1 ... recess, 13d2 ... recess, 14 ... brake caliper, 14a ... brake pad, 15 ... brake drum (wheel-side rotating member), 15a ... friction sliding surface, 16 ... backing Plate, 16a ... through hole, 16b ... through hole, 16c ... opposite surface, 16d ... recess, 17 ... brake shoe, 18 ... unit bearing (bearing), 18a ... inner race, 18b ... outer race, 18c ... flange, 18c1 ... through hole, 18d ... opposite surface, 18e ... concave, 19 ... dust cover, A ... region, B ... bolt D ... axial axles, H ... Hub, J ... axle, N ... carrier (non-rotating member), G ... damping material

Claims (5)

A brake device that obtains a braking force by pressing the friction member against the friction sliding surface of the wheel side rotation member,
One of a first plate member and a second plate member that are provided on an axle that rotatably supports the wheel-side rotation member and that are stacked in the axial direction of the axle and that are fastened together by a plurality of fastening members. The brake device which provided the recessed part dented in the said axial direction of the said axle shaft with respect to the opposing surface which opposes the other board member among said 1st board member and said 2nd board member. Each of the first plate member and the second plate member has a plurality of through holes through which the plurality of fastening members are inserted,
The recess provided in the one plate member is
2. The brake device according to claim 1, wherein the brake device is provided inside an area including fastening seat surfaces of the plurality of fastening members inserted through the plurality of through holes. The brake device is
A disc brake mechanism including a disc caliper that rotatably supports a disc rotor as the wheel-side rotating member and a brake pad as the friction member with respect to the disc rotor; a brake drum as the wheel-side rotating member; A drum brake mechanism including a backing plate that supports a brake shoe as a friction member so as not to rotate with respect to the brake drum, and the disk rotor and the brake drum are configured integrally.
The first plate member and the second plate member are
The backing plate,
A caliper bracket that is stacked on the backing plate in the axial direction of the axle and supports the brake caliper in a non-rotatable manner with respect to the disk rotor; and
Two of the flange portions for fixing to the non-rotating member a bearing that is stacked on the caliper bracket in the axial direction of the axle and supports the backing plate and the caliper bracket so as not to rotate with respect to the axle. The brake device according to claim 1 or 2. The first plate member is the caliper bracket;
The second plate member is the backing plate;
The recess is
The brake device according to claim 3, wherein the brake device is provided on the facing surface of the caliper bracket that faces the backing plate.   The brake device according to claim 3 or 4, wherein a dust cover that is sandwiched between the caliper bracket and the backing plate and covers a part of the disk rotor is provided.

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