JP2021081034A - Railroad vehicle disk brake device - Google Patents

Abstract

To simplify manufacturing of a control member, included in a railroad vehicle disk brake device, to control a ventilation volume in a ventilation passage.SOLUTION: A disk brake device (100) comprises a rotary member (10), a brake disk (20, 20A) and a control member (30, 30A). The brake disk (20, 20A) has an annular disk body (21) and fins (22). The control member (30, 30A) controls a ventilation volume between the fins (22) next to each other in a circumferential direction of the brake disk (20, 20A). The control member (30, 30A) includes a base plate (31) and a protrusion section (32). The protrusion section (32) is protruded from the base plate (31) toward the disk body (21). A concave section (222) is formed on a top face (221) of each fin (22). The protrusion section (32) is extended in the circumferential direction through the concave sections (222) from one of the neighboring fins (22) to another.SELECTED DRAWING: Figure 4

Description

The present disclosure relates to a disc brake device for railway vehicles.

Disc brake devices are widely used as braking devices for railway vehicles. The disc brake device includes an annular brake disc and a brake lining. The brake disc is fastened to, for example, a wheel and rotates with the wheel. Brake linings are pressed against the brake discs. The friction between the brake lining and the brake disc brakes the brake disc and wheels.

Brake discs of disc brake devices used in railway vehicles are required to have sufficient cooling performance from the viewpoint of ensuring their durability. In general, a plurality of fins are radially formed on the back surface of the brake disc in order to ensure cooling performance during braking. Each fin contacts the wheel and forms a vent between the back of the brake disc and the wheel. The air passage allows air to pass from the inner peripheral side to the outer peripheral side of the brake disc when the brake disc rotates with the wheels. The air flowing through the air passage cools the brake disc.

However, while the railroad vehicle is running, aerodynamic noise is generated due to the flow of air in the ventilation path between the brake disc and the wheels. In particular, when a railroad vehicle travels at high speed, the amount of ventilation in the ventilation path increases and a loud aerodynamic noise is generated.

On the other hand, Patent Document 1 discloses a disc brake device in which fins adjacent to each other in the circumferential direction are connected by a connecting portion. In this disc brake device, the connecting portion forms a portion having a minimum cross-sectional area in each of the air passages between the fins. According to Patent Document 1, by setting the total minimum cross-sectional area of the ventilation path to 18000 mm ² , the aerodynamic noise during high-speed traveling can be reduced.

In Patent Document 1, the connecting portion for reducing aerodynamic noise is integrally formed with the disc body and fins of the brake disc. Therefore, in the brake disc, the rigidity of the portion near the connecting portion is larger than the rigidity of the other portion. Therefore, when the brake lining slides with respect to the brake disc during braking and frictional heat is generated, the portion near the connecting portion is less likely to be thermally deformed than the other portions, and the brake disc is warped. As a result, the load on the bolts that fasten the brake discs to the wheels increases.

Therefore, Patent Document 2 proposes a technique of providing a disc brake device with an aerodynamic noise reducing member (control member) separate from the brake disc. The control member has a plate-shaped support portion and a plurality of projecting portions protruding from the support portion. According to Patent Document 2, by blocking a part of the ventilation path by each protruding portion of the control member, it is possible to suppress the flow of air in the ventilation path and reduce the aerodynamic noise generated during the running of the railway vehicle. it can. Further, since the brake disc and the control member are separate parts, the protruding portion of the control member does not affect the rigidity of the brake disc. Therefore, it is possible to prevent the brake disc from being warped due to the protruding portion.

JP-A-2007-205428 International Publication No. 2019/194203

In the disc brake disc device of Patent Document 2, a control member separate from the brake disc is used in order to reduce aerodynamic noise. The control member is mainly composed of a plate-shaped support portion and a plurality of projecting portions. As a method of manufacturing this control member, for example, a plate-shaped support portion and a plurality of protruding portions are separately molded and joined by welding or the like, or a thin metal material is pressed to support the support portion. And a method of integrally molding the protruding portion and the like. However, whichever method is used, the complex shape of the brake disc must be considered. That is, it is necessary to accurately arrange the protruding portion on the support portion so as not to interfere with a large number of fins provided on the back surface of the disc body. Therefore, there is a possibility that labor and cost for processing the control member will increase.

An object of the present disclosure is to simplify the manufacture of a control member in a disc brake device for a railway vehicle including a control member for controlling the amount of airflow in the ventilation path.

The disc brake device according to the present disclosure is a disc brake device for railway vehicles. The disc brake device includes a rotating member, a brake disc, and a control member. The rotating member is attached to the axle of a railroad vehicle. The brake disc includes an annular disc body and a plurality of fins. The disk body has a back surface facing the rotating member. The plurality of fins are arranged radially on the back surface. The control member controls the amount of airflow between the adjacent fins in the circumferential direction of the brake disc among the plurality of fins. The control member includes a base plate and a protrusion. The base plate is sandwiched between the rotating member and the fins. The protrusion protrudes from the base plate toward the disc body. A recess is formed on the top surface of each of the adjacent fins so as to cross the fin in the circumferential direction. The protrusion extends circumferentially through the recess from one of the adjacent fins to the other.

According to the present disclosure, it is possible to simplify the manufacture of a control member in a disc brake device for a railway vehicle including a control member for controlling the amount of airflow in the ventilation path.

FIG. 1 is a vertical cross-sectional view showing a schematic configuration of a disc brake device for a railway vehicle according to the first embodiment. FIG. 2 is a back view of a brake disc included in the disc brake device shown in FIG. FIG. 3 is a plan view of a control member included in the disc brake device shown in FIG. FIG. 4 is a sectional view taken along line IV-IV of FIG. FIG. 5 is a vertical cross-sectional view showing a part of the disc brake device for a railway vehicle according to the second embodiment.

The disc brake device according to the embodiment is a disc brake device for a railway vehicle. The disc brake device includes a rotating member, a brake disc, and a control member. The rotating member is attached to the axle of a railroad vehicle. The brake disc includes an annular disc body and a plurality of fins. The disk body has a back surface facing the rotating member. The plurality of fins are arranged radially on the back surface. The control member controls the amount of airflow between the adjacent fins in the circumferential direction of the brake disc among the plurality of fins. The control member includes a base plate and a protrusion. The base plate is sandwiched between the rotating member and the fins. The protrusion protrudes from the base plate toward the disc body. A recess is formed on the top surface of each of the adjacent fins so as to cross the fin in the circumferential direction. The protrusion extends from one of the adjacent fins to the other through the recess in the circumferential direction (first configuration).

According to the disc brake device according to the first configuration, the control member can control the amount of airflow between the fins adjacent to each other in the circumferential direction on the back surface of the disc body of the brake disc. That is, in the disc brake device, the ventilation path formed by the fins adjacent to each other in the circumferential direction together with the disc body and the rotating member is partially blocked by the protruding portion provided on the control member. As a result, the amount of ventilation in the ventilation path can be limited, and the aerodynamic noise generated when the railway vehicle is running can be reduced.

In the disc brake device according to the first configuration, the fins adjacent to each other in the circumferential direction of the brake disc have a recess on the top surface thereof that crosses the fin in the circumferential direction. The protruding portion of the control member extends in the circumferential direction through the recessed portion of the fin. That is, the portion of the protrusion extending in the circumferential direction corresponding to the fin can be accommodated in the recess of the fin. Therefore, when manufacturing the control member, it is not necessary to consider the position of each fin provided on the back surface of the disc body and arrange the protruding portion so as to avoid the fins. Therefore, the manufacturing of the control member can be performed relatively simply, and the labor and cost for processing the control member can be reduced.

The protruding portion of the control member is preferably positioned on the inner peripheral side of the brake disc (second configuration).

For example, when removing foreign matter in the air passage formed by the rotating member and the brake disc, air is blown into the air passage from the inner peripheral side of the brake disc without disassembling the disc brake device. On the other hand, in the second configuration, the protruding portion of the control member is positioned on the inner peripheral side of the brake disc. Therefore, even if foreign matter such as dust or mud is clogged between the protrusion of the control member that partially blocks the ventilation path and the brake disc, the foreign matter can be easily removed. Therefore, the maintainability of the disc brake device can be improved.

The protruding portion of the control member may be positioned on the outer peripheral side of the brake disc (third configuration).

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In each figure, the same or equivalent configurations are designated by the same reference numerals, and the same description is not repeated.

[First Embodiment]
(overall structure)
FIG. 1 is a vertical cross-sectional view showing a schematic configuration of a disc brake device 100 for a railway vehicle according to the present embodiment. The vertical cross section means a cross section obtained by cutting the disc brake device 100 on a plane including the central axis X. The central axis X is the axis of the axle 200 of the railway vehicle. Hereinafter, the direction in which the central axis X extends is referred to as an axial direction.

As shown in FIG. 1, the disc brake device 100 includes a rotating member 10, a brake disc 20, and a control member 30.

The rotating member 10 is attached to the axle 200 and rotates around the central axis X integrally with the axle 200. In the example of this embodiment, the rotating member 10 is a wheel of a railway vehicle. However, the rotating member 10 may be a disc body other than the wheels. The rotating member 10 shown in FIG. 1 has a boss portion 11, a rim portion 12, and a plate portion 13. The plate portion 13 connects the boss portion 11 into which the axle 200 is inserted and the rim portion 12 constituting the outer peripheral portion of the wheel. The inner peripheral edge of the plate portion 13 is connected to the boss portion 11 via the arcuate curved portion 14 in the vertical cross-sectional view of the rotating member 10. The outer peripheral edge of the plate portion 13 is connected to the rim portion 12 via an arcuate curved portion 15 in a vertical cross-sectional view of the rotating member 10.

The brake disc 20 is provided on both sides of the disc-shaped rotating member 10. These brake discs 20 are fastened to the plate portion 13 of the rotating member 10 by, for example, a fastening member 40 composed of bolts and nuts. A brake lining 50 is provided on the outside of each brake disc 20 in the axial direction. The control member 30 is arranged between the rotating member 10 and each brake disc 20.

(Detailed composition)
FIG. 2 is a view (back view) of one of the brake discs 20 arranged on both sides of the rotating member 10 as viewed from the rotating member 10 side. FIG. 2 shows a quarter circumference portion of the brake disc 20. Hereinafter, the circumferential direction and the radial direction of the brake disc 20 are simply referred to as the circumferential direction and the radial direction.

With reference to FIG. 2, the brake disc 20 includes a disc body 21 and a plurality of fins 22.

The disk body 21 forms an annular shape. The disc body 21 has a substantially annular plate shape with the central axis X as the axis. The disk body 21 has a sliding surface 211 and a back surface 212. The sliding surface 211 is a surface provided on one side in the axial direction of the disk body 21. A brake lining 50 (FIG. 1) is pressed against the sliding surface 211 in order to generate a braking force. The back surface 212 is a surface provided on the other side of the disk body 21 in the axial direction and faces the rotating member 10 (FIG. 1).

The plurality of fins 22 are arranged radially on the back surface 212 of the disc body 21. These fins 22 extend from the inner peripheral side to the outer peripheral side of the disc body 21. Each fin 22 projects from the back surface 212 toward the rotating member 10 (FIG. 1). As a result, a space is formed between the rotating member 10, the fins 22 adjacent to each other in the circumferential direction, and the disk body 21. These spaces serve as ventilation passages through which air passes when the brake disc 20 rotates together with the rotating member 10.

In the present embodiment, some of the fins 22 are formed with fastening holes 23 that penetrate the fins 22 and the disc body 21. A concave key groove 24 is formed on the top surface 221 of the other fins 22. A fastening member 40 (FIG. 1) is inserted into each fastening hole 23. A key (not shown) for regulating the relative rotation between the brake disc 20 and the rotating member 10 (FIG. 1) is fitted in each key groove 24. The number of fins 22, the number of fastening holes 23, and the number of keyways 24 can be appropriately set. In the example of the present embodiment, the fastening holes 23 or the key grooves 24 are formed in all the fins 22, but there may be fins 22 in which the fastening holes 23 and the key grooves 24 are not formed.

A recess 222 is formed on the top surface 221 of each fin 22. Each of the recesses 222 crosses the fin 22 provided with the recess 222 in the circumferential direction. The recess 222 is arranged on the inner peripheral side of the brake disc 20. These recesses 222 are arranged on a virtual circle C concentric with the disc body 21, for example, when viewed from the back side of the brake disc 20.

In the example of the present embodiment, the recess 222 of the fin 22 having the key groove 24 is arranged inside the key groove 24 in the radial direction so as not to overlap the key groove 24. However, as long as the key (not shown) fitted in the key groove 24 does not interfere with the recess 222, a part of the recess 222 and a part of the key groove 24 may overlap. The recess 222 of the fin 22 having the fastening hole 23 is arranged inside the fastening hole 23 in the radial direction so as not to overlap the fastening hole 23.

As shown in FIG. 2, the length of the keyway 24 in the radial direction is typically larger than the diameter of the fastening hole 23. Therefore, the radial positions of the plurality of recesses 222 corresponding to the plurality of fins 22 are usually determined with reference to the key groove 24 and the key (not shown). However, when the diameter of the fastening hole 23 is larger than the length of the key groove 24 in the radial direction, the radial position of the recess 222 can be determined with reference to the fastening hole 23.

FIG. 3 is a view (plan view) of the control member 30 as viewed from the brake disc 20 side. FIG. 3 shows a quarter circumference portion of the control member 30. In FIG. 3, in addition to the control member 30 (solid line), the brake disc 20 is shown by a chain double-dashed line.

The control member 30 is a member different from the brake disc 20. The control member 30 controls the amount of airflow between the fins 22 adjacent to each other in the circumferential direction. The control member 30 includes a base plate 31 and a protrusion 32.

The base plate 31 has a substantially annular plate shape and is arranged substantially coaxially with the disc body 21. The base plate 31 is sandwiched between the rotating member 10 (FIG. 1) and the plurality of fins 22. That is, the rotating member 10 comes into contact with one surface of the base plate 31, and the top surface 221 of the fin 22 comes into contact with the other surface of the base plate 31.

In the example of this embodiment, the radial length of the base plate 31 is slightly shorter than the radial length of the disc body 21. However, the radial length of the base plate 31 may be longer than the radial length of the disc main body 21, or may be equal to the radial length of the disc main body 21. The radial length of the base plate 31 can be appropriately set in the range from the inner peripheral edge to the outer peripheral edge of the plate portion 13 (FIG. 1) of the rotating member 10.

A plurality of openings 311 are formed in the base plate 31 corresponding to the fastening holes 23 of the brake disc 20 in order to insert the fastening member 40 (FIG. 1). Further, in order to insert the above-mentioned key (not shown) into the base plate 31, a plurality of openings 312 are formed corresponding to the key groove 24 of the brake disc 20.

A protrusion 32 is formed on the surface of the base plate 31 on the brake disc 20 side. The protruding portion 32 projects from the base plate 31 toward the disc body 21. The protrusion 32 is arranged at a position corresponding to the recess 222 of the fin 22 in the radial direction. In the present embodiment, since the recess 222 is arranged on the inner peripheral side of the brake disc 20, the protruding portion 32 is also positioned on the inner peripheral side of the brake disc 20. The inner peripheral side of the brake disc 20 refers to, for example, a region of the brake disc 20 that is inside in the radial direction from the axial center of the fastening hole 23. The region of the brake disc 20 that is radially outer of the axis of the fastening hole 23 is the outer peripheral side of the brake disc 20.

The protrusion 32 extends from one of the fins 22 adjacent to each other in the circumferential direction to the other through the recess 222 in the circumferential direction. In the example of this embodiment, the protrusion 32 passes through the recess 222 of all the fins 22 and extends in the circumferential direction. That is, the protruding portion 32 forms a substantially annular shape in a plan view of the control member 30.

The control member 30 can be made of a thin metal material having a plate thickness of 1.0 mm to 3.0 mm. The control member 30 is formed by, for example, pressing the thin wall material. In this case, the base plate 31 and the protruding portion 32 are integrally formed. However, after the base plate 31 and the protruding portion 32 are formed separately, the protruding portion 32 can be fixed to the base plate 31 by welding or the like.

Hereinafter, the relationship between the brake disc 20 and the control member 30 will be described in more detail with reference to FIG. FIG. 4 is a sectional view taken along line IV-IV of FIG. In FIG. 4, for convenience of explanation, the rotating member 10 is also shown together with the brake disc 20 and the control member 30.

With reference to FIG. 4, in the brake disc 20, the recess 222 is a portion recessed from the top surface 221 of the fin 22 toward the disc body 21 side. However, in order to secure the heat capacity of the disc body 21, the recess 222 does not penetrate into the disc body 21. That is, the bottom surface 222b of the recess 222 is substantially on the same plane as the back surface 212 of the disk body 21, or is located closer to the top surface 221 of the fin 22 than the back surface 212.

In the example of the present embodiment, the recess 222 is substantially L-shaped in the vertical cross-sectional view of the brake disc 20. The recess 222 is defined by a bottom surface 222b and a side surface 222s on the keyway 24 side.

The protruding portion 32 of the control member 30 projects from the base plate 31 toward the back surface 212 of the disc body 21. The portion of the protruding portion 32 corresponding to the fin 22 is arranged in the recess 222. The tip of the protrusion 32 does not come into contact with the back surface 212 of the disc body 21 and the bottom surface 222b of the recess 222. That is, a gap for passing air is formed between the tip of the protrusion 32 and the brake disc 20. The axial distance from the tip of the protrusion 32 to the back surface 212 of the disc body 21 is, for example, 0.5 mm to 4.5 mm.

The radial outer surface of the protrusion 32 may be in contact with or non-contact with the side surface 222s of the recess 222. When the protruding portion 32 is brought into contact with the side surface 222s of the recess 222 in advance, deformation of the protruding portion 32 can be suppressed when the control member 30 rotates together with the rotating member 10 and the brake disc 20. Further, when the control member 30 is assembled to the brake disc 20, the control member 30 can be easily positioned.

The shape of the protrusion 32 can be appropriately determined. The protrusion 32 may be formed hollow or solid. The surface of the protrusion 32 preferably has a smooth shape having no corners from the viewpoint of smoothly guiding the air in the ventilation path. The portion of the protruding portion 32 located at the boundary with the base plate 31 has a substantially arc shape in a vertical cross-sectional view of, for example, the control member 30. That is, the inner end 32i of the protruding portion 32 is the R stop at the boundary portion with the base plate 31 on the inner side in the radial direction, and the outer end 32e of the protruding portion 32 is the R stop at the boundary portion with the base plate 31 on the outer side in the radial direction. is there.

The positions of the inner end 32i and the outer end 32e of the protruding portion 32, that is, the position and range of the protruding portion 32 can be appropriately determined. In the example of this embodiment, the inner end 32i is arranged slightly outside the inner peripheral edge of the disk body 21 in the radial direction. However, if the tip of the protruding portion 32 is within the range of the disc body 21, the inner end 32i may be arranged radially inside the inner peripheral edge of the disc body 21. The outer end 32e is arranged slightly inside the inner end 24i of the keyway 24 in the radial direction.

(effect)
In the disc brake device 100 according to the present embodiment, the protruding portion 32 of the control member 30 projects toward the disc body 21 side, and a ventilation path defined by the rotating member 10 and the disc body 21 and fins 22 of the brake disc 20 is partially formed. It is blocking the target. As a result, the amount of ventilation in the ventilation path can be limited, and the aerodynamic noise generated when the railway vehicle is running can be reduced.

In the disc brake device 100 according to the present embodiment, each fin 22 of the brake disc 20 has a recess 222 on the top surface 221 that crosses itself in the circumferential direction. The protruding portion 32 of the control member 30 passes through the recess 222 of the fin 22 and extends in the circumferential direction over the plurality of fins 22. That is, the portion of the protruding portion 32 extending in the circumferential direction corresponding to the fin 22 is housed in the recess 222. Therefore, when manufacturing the control member 30, it is not necessary to consider the position of each fin 22 and to avoid the fin 22 to form the protruding portion 32. Therefore, the control member 30 can be simply manufactured, and the labor and cost for processing the control member 30 can be reduced.

In the present embodiment, the protruding portion 32 of the control member 30 is positioned on the inner peripheral side of the brake disc 20. Therefore, by blowing air into the ventilation path from the inner peripheral side of the brake disc 20, foreign matter stuck between the protrusion 32 and the brake disc 20 can be removed relatively easily. Therefore, the maintainability of the disc brake device 100 can be improved.

[Second Embodiment]
FIG. 5 is a vertical cross-sectional view showing a part of the disc brake device 100A according to the second embodiment. The disc brake device 100A according to the present embodiment basically has the same configuration as the disc brake device 100 according to the first embodiment. However, the disc brake device 100A is different from the disc brake device 100 in the position of the protruding portion 32 of the control member 30A.

As shown in FIG. 5, the protruding portion 32 of the control member 30A is positioned on the outer peripheral side of the brake disc 20A. Correspondingly, the recess 222 provided in each fin 22 of the brake disc 20A is also positioned on the outer peripheral side of the brake disc 20A.

In the example of the present embodiment, the recess 222 has a substantially rectangular shape in a vertical cross-sectional view of the brake disc 20A. That is, the recess 222 is defined by a bottom surface 222b and side surfaces 222s arranged on both sides of the bottom surface 222b.

The protruding portion 32 of the control member 30A protrudes from the base plate 31 toward the back surface 212 of the disc body 21 as in the first embodiment. The recess 222 accommodates a portion of the protrusion 32 corresponding to the fin 22. The protrusion 32 does not come into contact with the back surface 212 of the disk body 21 and the bottom surface 222b of the recess 222. However, the protrusion 32 may come into contact with at least one of the side surfaces 222s of the recess 222. When the protrusion 32 is brought into contact with one or both of the side surfaces 222s of the recess 222, the deformation of the protrusion 32 during rotation is suppressed. Further, the control member 30A can be easily positioned with respect to the brake disc 20A.

In the present embodiment, the inner end 32i of the protruding portion 32 is arranged slightly outside the outer end 24e of the key groove 24 in the radial direction. The outer end 32e of the protrusion 32 is arranged inside the outer peripheral edge of the disk body 21 in the radial direction.

Also in the disc brake device 100A according to the present embodiment, the protrusion 32 of the control member 30A partially blocks the ventilation path defined by the rotating member 10, the fins 22 of the brake disc 20A, and the disc body 21. .. Therefore, the amount of airflow in the ventilation path can be limited, and the aerodynamic noise generated when the railway vehicle travels can be reduced.

The protrusion 32 of the control member 30A can pass through the recess 222 of the fins 22 and extend in the circumferential direction across the plurality of fins 22, as in the first embodiment. Therefore, when manufacturing the control member 30A, it is not necessary to consider the position of each fin 22 and to avoid the fin 22 to form the protruding portion 32. Therefore, the control member 30A can be simply manufactured, and the labor and cost for processing the control member 30A can be reduced.

Although the embodiment according to the present disclosure has been described above, the present disclosure is not limited to the above embodiment, and various changes can be made as long as the purpose is not deviated.

In the first embodiment, the protruding portion 32 of the control member 30 is positioned on the inner peripheral side of the brake disc 20. In the second embodiment, the protruding portion 32 of the control member 30A is positioned on the outer peripheral side of the brake disc 20A. However, the position of the protrusion 32 is not limited to the examples shown in these embodiments. For example, the protruding portion 32 can be appropriately moved in the radial direction in the range from the inner peripheral edge to the outer peripheral edge of the plate portion 13 of the rotating member 10. That is, the inner end 32i and the outer end 32e of the protruding portion 32 can be arranged at arbitrary positions within the range from the inner peripheral edge to the outer peripheral edge of the plate portion 13. However, the protruding portion 32 is arranged so as not to interfere with the key and the fastening member 40.

In the above embodiment, the recess 222 provided in the fin 22 has an L-shape or a rectangular shape in a vertical cross-sectional view of the brake discs 20 and 20A. However, the shape of the recess 222 is not limited to this. The recess 222 may have a shape along the protrusion 32 of the control members 30 and 30A.

In the above embodiment, the base plate 31 and the protruding portion 32 of the control members 30 and 30A form a substantially annular shape in a plan view. However, the control members 30 and 30A may be divided into a plurality of parts in the circumferential direction. The control members 30 and 30A may be divided into two in the circumferential direction or may be divided into four, for example.

100, 100A: Disc brake device 10: Rotating member 20, 20A: Brake disc 21: Disc body 212: Back surface 22: Fins 221: Top surface 222: Recessed surface 22, 30A: Control member 31: Base plate 32: Protruding part

Claims (3)

A disc brake device for railroad vehicles
The rotating member attached to the axle of the railway vehicle and
A brake disc including an annular disc body having a back surface facing the rotating member and a plurality of fins radially arranged on the back surface.
A control member that controls the amount of airflow between adjacent fins in the circumferential direction of the brake disc among the plurality of fins, the base plate sandwiched between the rotating member and the fins, and the disc from the base plate. The control member including a protrusion protruding toward the main body, and
With
A recess is formed on the top surface of each of the adjacent fins so as to cross the fin in the circumferential direction.
A disc brake device in which the protrusion extends from one of the adjacent fins to the other, passes through the recess, and extends in the circumferential direction. The disc brake device according to claim 1.
The protruding portion is a disc brake device positioned on the inner peripheral side of the brake disc. The disc brake device according to claim 1.
The protruding portion is a disc brake device positioned on the outer peripheral side of the brake disc.

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