TWI785615B - Disc Brake Devices for Railway Vehicles - Google Patents

Abstract

A disc brake device (100) includes a rotating member (10), a brake disc (20, 20A), and a control member (30, 30A). The brake disc (20, 20A) includes an annular disc body (21) and fins (22). The control member (30, 30A) is used to control the air flow between the adjacent fins (22) in the circumferential direction of the brake disc (20, 20A). A control member (30, 30A) includes a base plate (31) and a protrusion (32). The protrusion (32) protrudes from the base plate (31) toward the disc body (21). A recess (222) is formed on the top surface (221) of each fin (22). The protrusion (32) extends from one of the adjacent fins (22) to the other in the circumferential direction through the recess (222).

Description

Disc Brake Devices for Railway Vehicles

The present invention 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 has a ring-shaped brake disc and a brake lining. The brake disc, for example, is connected to the wheel and rotates together with the wheel. Attach the brake lining to the brake disc. The brake disc and the wheel are braked by the friction between the brake lining and the brake disc.

Brake rotors of disc brake devices used in railway vehicles require sufficient cooling performance from the viewpoint of ensuring their durability. In order to ensure cooling performance during braking, generally speaking, a plurality of fins are formed radially on the back of the brake rotor. Each fin is in contact with the wheel, and forms a ventilation path between the back surface of the brake disc and the wheel. The ventilation path allows air to pass from the inner peripheral side of the brake rotor to the outer peripheral side when the brake rotor rotates together with the wheel. The brake disc is cooled by the air flowing in the ventilation path.

However, when the railway vehicle is running, aerodynamic sound is generated due to the air flowing in the ventilation path between the brake disc and the wheel. Especially when the railway vehicle is running at a high speed, the air flow in the air passage increases to generate a large amount of aerodynamic sound.

In contrast, Patent Document 1 proposes a disc brake device in which "fins adjacent to each other in the circumferential direction" are connected by a connecting portion. In the disc brake device, each ventilation path between the fins forms a part with the "minimized cross-sectional area" through the connection part. According to Patent Document 1, by setting the sum of the minimum cross-sectional areas of the ventilation paths to 18000 mm ² or less, the aerodynamic noise during high-speed driving can be reduced.

In Patent Document 1, the coupling portion for reducing aerodynamic sound is integrally formed with the disc body and the fins of the brake disc. Therefore, in the brake disc, the rigidity of the portion near the connecting portion is greater than the rigidity of other portions. Accordingly, during braking, the brake lining slides against the brake disc, and when frictional heat is generated, the parts near the connecting portion are less likely to be thermally deformed than other parts, and warp the brake disc. As a result, the load on the "bolts connecting the brake rotor to the wheel" will increase.

In view of this, Patent Document 2 proposes a technique in which an aerodynamic sound reduction member (control member) separate from a brake disc is provided in a disc brake device. The control member includes a plate-shaped support portion and a plurality of protrusions protruding from the support portion. According to Patent Document 2, each protrusion of the control member closes a part of the ventilation path, thereby suppressing the flow of air in the ventilation path, and reducing the aerodynamic sound generated during the running of the railway vehicle. In addition, since the brake disc and the control member are different parts, the protrusion of the control member will not affect the rigidity of the brake disc. Accordingly, it is possible to prevent warping of the brake disc due to the protruding portion. [Prior Art Literature] [Patent Document]

[Patent Document 1] Japanese Patent Laid-Open No. 2007-205428 [Patent Document 2] International Publication No. 2019/194203

[Problem to be solved by the invention]

In the disc brake rotor device of Patent Document 2, in order to reduce aerodynamic noise, a separate control member from the brake rotor is used. The control member is mainly composed of a plate-shaped support portion and a plurality of protrusions. As a method for producing the control member, for example, a method of separately forming a plate-shaped support portion and a plurality of protruding portions, and joining these members by welding or the like; or performing punching on a thin metal sheet Processing, the method of integrally forming the support portion and the protruding portion, etc. However, even in the case of adopting any of the above methods, the complicated shape of the brake disc has to be considered. That is, in order not to interfere with a large number of fins provided on the rear surface of the disk body, it is necessary to correctly arrange the protrusions on the supporting parts. Therefore, there is a possibility that the labor and cost of processing the control member will increase.

The object of the present invention is to simplify the manufacture of the control member in a railway vehicle disc brake device including a "control member for controlling the air flow in the air passage". [means to solve the problem]

The disc brake device of the present invention 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 the railway vehicle. The brake disc includes a ring-shaped disc body and a plurality of fins. The disk body has a back surface opposite to the rotating member. A plurality of fins are arranged radially on the back surface. The control member is used to control the air flow 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. On the top surfaces of the adjacent fins, recesses are formed that traverse the fins in the circumferential direction. The protrusion extends from one of the adjacent fins to the other through the recess in the circumferential direction. [Effect of the invention]

According to the present invention, in the disc brake device for a railway vehicle including "the control member for controlling the air flow in the air passage", the manufacture of the control member can be simplified.

The disc brake device of 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 the railway vehicle. The brake disc includes a ring-shaped disc body and a plurality of fins. The disk body has a back surface opposite to the rotating member. A plurality of fins are arranged radially on the back surface. The control member is used to control the air flow 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. On the top surfaces of the adjacent fins, recesses are formed that traverse the fins in the circumferential direction. The protruding portion extends in the circumferential direction through the concave portion from one of the adjacent fins to the other (first structure).

According to the disc brake device of the first configuration, the air flow rate between the adjacent fins in the circumferential direction can be controlled by the control member on the back surface of the disc body of the brake disc. That is, in this disc brake device, the ventilation path formed by the adjacent fins in the circumferential direction together with the disc body and the rotating member is partially closed by the protrusion provided on the control member. In this way, the ventilation volume in the ventilation path can be limited, and the aerodynamic sound generated when the railway vehicle is running can be reduced.

In the disc brake device of the first structure, the adjacent fins in the circumferential direction of the brake disc each have a recess on the top surface thereof that traverses 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, "a portion of the protruding portion extending in the circumferential direction corresponding to the fin" can be accommodated in the concave portion of the fin. Therefore, when manufacturing the control member, it is not necessary to consider "the positions of the fins provided on the back surface of the disc body", and the protrusions are arranged avoiding the fins. Accordingly, manufacturing of the control member can be performed relatively simply, and labor and cost required for machining the control member can be reduced.

The protruding portion of the control member is preferably located on the inner peripheral side of the brake rotor (second structure).

For example, when removing foreign matter in the "ventilation path formed by the rotating member and the brake disc", there is no need to disassemble the disc brake device, and air is blown into the vent path from the inner peripheral side of the brake disc. On the other hand, in the second structure, the protruding portion of the control member is located on the inner peripheral side of the brake rotor. Therefore, even if foreign matter such as dirt or dirt gets stuck between the “protruding portion of the control member that partially closes the ventilation passage” and the brake rotor, the foreign matter can be easily removed. Accordingly, the maintainability of the disc brake device can be improved.

The protruding portion of the control member may be located on the outer peripheral side of the brake rotor (third structure).

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same or corresponding structures in each drawing are denoted by the same drawing number, and the description thereof will not be repeated.

[First Embodiment] (overall structure) Fig. 1 is a longitudinal sectional view showing a schematic structure of a disc brake device 100 for a railway vehicle according to the present embodiment. The so-called longitudinal section is a section taken by cutting the disc brake device 100 on a plane including the central axis X. As shown in FIG. 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 called 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 a wheel. The rotating member 10 shown in FIG. 1 has a hub portion 11 , an edge portion 12 , and a plate portion 13 . The plate portion 13 connects the "hub portion 11 into which the axle 200 can be 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 hub portion 11 through the arc-shaped curved portion 14 when viewed in the longitudinal section of the rotating member 10 . The outer peripheral edge of the plate portion 13 is connected to the edge portion 12 through the arc-shaped curved portion 15 in the vertical cross-sectional view of the rotating member 10 .

The brake discs 20 are arranged on both sides of the disc-shaped rotating member 10 . These brake rotors 20 are connected to the plate portion 13 of the rotating member 10 by "a connecting member 40 composed of bolts and nuts", for example. In the axial direction, a brake lining 50 is provided on the outer side of each brake disc 20 . The control member 30 is disposed between the rotating member 10 and each brake disc 20 .

[detail structure] FIG. 2 is a view (rear view) of one of the brake discs 20 disposed on both sides of the rotary member 10 viewed from the rotary member 10 side. In FIG. 2 , a 1/4 turn portion of the brake rotor 20 is shown. Hereinafter, the circumferential direction and the radial direction of the brake rotor 20 are simply referred to as the circumferential direction and the radial direction.

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

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

A plurality of fins 22 are radially arranged on the back surface 212 of the disk body 21 . These fins 22 extend from the inner peripheral side of the disc body 21 toward the outer peripheral side. Each fin 22 protrudes from the back surface 212 toward the rotating member 10 ( FIG. 1 ). Thereby, a space is formed between the rotating member 10 , the fins 22 adjacent in the circumferential direction, and the disk body 21 . These spaces serve as ventilation paths through which air can pass when the brake rotor 20 rotates together with the rotating member 10 .

In this embodiment, a connection hole 23 penetrating through the fin 22 and the disk main body 21 is formed in a part of the fin 22 . On top surfaces 221 of other fins 22 , recessed key grooves 24 are formed. A connecting member 40 ( FIG. 1 ) is inserted into each connecting hole 23 . A key (not shown) for restricting relative rotation between the brake rotor 20 and the rotating member 10 ( FIG. 1 ) is fitted in each key groove 24 . The number of fins 22, the number of connection holes 23, and the number of key grooves 24 can be appropriately set. In the example of this embodiment, although the connection hole 23 or the key groove 24 was formed in all the fins 22, the fin 22 which does not form the connection hole 23 and the key groove 24 may exist.

A concave portion 222 is formed on the top surface 221 of each fin 22 . Each recess 222 traverses the fin 22 provided with the recess 222 in the circumferential direction. The concave portion 222 is arranged on the inner peripheral side of the brake rotor 20 . These recesses 222 are, for example, arranged on a virtual circle C concentric with the disc body 21 in the rear view of the brake rotor 20 .

In the example of this embodiment, the concave portion 222 of the fin 22 having the key groove 24 is arranged on the inside of the key groove 24 in the radial direction so as not to overlap with the key groove 24 . However, as long as a key (not shown) fitted into the key groove 24 does not interfere with the recess 222 , a part of the recess 222 may overlap with a part of the key groove 24 . The recessed portion 222 of the fin 22 having the connecting hole 23 is arranged on the inner side of the connecting hole 23 in the radial direction so as not to overlap with the connecting hole 23 .

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

FIG. 3 is a view (plan view) of the control member 30 viewed from the brake rotor 20 side. In FIG. 3 , a 1/4 turn portion of the control member 30 is shown. In FIG. 3 , except for the control member 30 (solid line), the brake rotor 20 is indicated by a two-dot chain line.

The control member 30 is a member different from the brake rotor 20 . The control member 30 is used to control the air flow between the adjacent fins 22 in the circumferential direction. The control member 30 includes a base plate 31 and a protrusion 32 .

The base plate 31 is approximately in the shape of an annular plate, and is arranged substantially coaxially with the disc body 21 . The base plate 31 is pinched between the rotating member 10 ( FIG. 1 ) and the plurality of fins 22 . That is, the rotating member 10 is in contact with one side of the base plate 31 , and the top surface 221 of the fin 22 is in contact with the other side 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 body 21 or may be equal to the radial length of the disc body 21 . The radial length of the base plate 31 can be appropriately set within the range from the inner peripheral edge to the outer peripheral edge of the plate portion 13 ( FIG. 1 ) of the rotating member 10 .

In the base plate 31 , a plurality of openings 311 are formed corresponding to the connecting holes 23 of the brake rotor 20 for passing the connecting member 40 ( FIG. 1 ). Furthermore, in the base plate 31 , a plurality of openings 312 are formed corresponding to the key grooves 24 of the brake rotor 20 for passing the above-mentioned key (not shown).

Among the two side surfaces of the base plate 31 , a protruding portion 32 is formed on the surface on the brake rotor 20 side. The protruding portion 32 protrudes from the base plate 31 toward the disc body 21 . The protrusions 32 are arranged at positions corresponding to the recesses 222 of the fins 22 in the radial direction. In this embodiment, since the concave portion 222 is arranged on the inner peripheral side of the brake rotor 20 , the protruding portion 32 is also located on the inner peripheral side of the brake rotor 20 . The inner peripheral side of the brake rotor 20 refers to, for example, a region of the brake rotor 20 that is radially inner than the axis of the connecting hole 23 . In the brake rotor 20 , the region radially outside the axis of the coupling hole 23 is the outer peripheral side of the brake rotor 20 .

The protruding portion 32 extends in the circumferential direction through the concave portion 222 from one to the other of the adjacent fins 22 in the circumferential direction. In the example of this embodiment, the protrusions 32 pass through the recesses 222 of all the fins 22 and extend in the circumferential direction. That is, the protruding portion 32 is substantially annular in plan view of the control member 30 .

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

Hereinafter, referring to FIG. 4 , the relationship between the brake disc 20 and the control member 30 will be described in more detail. FIG. 4 is a sectional view of IV-IV in FIG. 3 . In FIG. 4 , for the convenience of description, the brake disc 20 and the control member 30 are shown, and the rotating member 10 is jointly shown.

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

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

The protruding portion 32 of the control member 30 protrudes from the base plate 31 toward the rear surface 212 of the disc body 21 . Among the protruding portion 32 , the portion corresponding to the fin 22 is disposed in the concave portion 222 . The front end of the protruding portion 32 is not in contact with the back surface 212 of the disc body 21 and the bottom surface 222b of the concave portion 222 . That is, a gap through which air can pass is formed between the front end of the protruding portion 32 and the brake rotor 20 . The distance in the axial direction from the front end of the protruding portion 32 to the rear surface 212 of the disc body 21 is, for example, 0.5 mm to 4.5 mm.

The radially outer surface of the protruding portion 32 may be in contact with the side surface 222s of the recessed portion 222 or may not be in contact. When the protruding portion 32 is brought into contact with the side surface 222s of the recessed portion 222 in advance, when the control member 30 rotates together with the rotating member 10 and the brake rotor 20, deformation of the protruding portion 32 can be suppressed. In addition, when the control member 30 is assembled to the brake rotor 20, the positioning of the control member 30 can be easily performed.

The shape of the protruding portion 32 can be appropriately determined. The protruding portion 32 may be hollow or solid. From the viewpoint of smoothly guiding the air in the air passage, the surface of the protruding portion 32 preferably has a rounded shape without corners. Among the protruding portion 32 , the portion located at the boundary with the base plate 31 is, for example, slightly arc-shaped in the longitudinal section view of the control member 30 . The inner end 32i of the protruding part 32 is the arc terminal of the boundary portion between the radially inner side and the base plate 31, and the outer end 32e of the protruding part 32 is the boundary between the radially outer side and the base plate 31. The arc terminal of the section.

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 disc main body 21 in the radial direction. However, as long as the front end of the protruding portion 32 is located within the range of the disc body 21 , the inner end 32 i may also be disposed radially inward than the inner peripheral edge of the disc body 21 . The outer end 32 e is disposed slightly inward of the inner end 24 i of the key groove 24 in the radial direction.

(Effect) In the disc brake device 100 of this embodiment, the protruding portion 32 of the control member 30 protrudes toward the disc body 21 side, and partially closes the section defined by the rotating member 10, the disc body 21 and the fins 22 of the brake disc 20. ventilation path. In this way, the ventilation volume in the ventilation path can be limited, and the aerodynamic sound generated when the railway vehicle is running can be reduced.

In the disc brake device 100 of the present embodiment, each fin 22 of the brake rotor 20 has, on the top surface 221 , a concave portion 222 traversing the fin in the circumferential direction. The protruding portion 32 of the control member 30 passes through the concave portion 222 of the fin 22 and extends in the circumferential direction over the plurality of fins 22 . That is, among the protrusions 32 extending in the circumferential direction, portions corresponding to the fins 22 are accommodated in the recesses 222 . Therefore, when manufacturing the control member 30 , it is not necessary to consider the positions of the fins 22 , and it is not necessary to form the protrusions 32 avoiding the fins 22 . Accordingly, the control member 30 can be manufactured simply, and the labor and cost required for processing the control member 30 can be reduced.

In this embodiment, the protruding portion 32 of the control member 30 is located on the inner peripheral side of the brake rotor 20 . Therefore, by blowing air from the inner peripheral side of the brake rotor 20 into the ventilation path, it is possible to relatively easily remove "foreign matter stuck between the protruding portion 32 and the brake rotor 20". Accordingly, the maintainability of the disc brake device 100 can be improved.

[Second Embodiment] Fig. 5 is a partial longitudinal sectional view showing a disc brake device 100A according to the second embodiment. The disc brake device 100A of the present embodiment basically has the same structure as the disc brake device 100 of the first embodiment. However, in the disc brake device 100A, the position of the protrusion 32 of the control member 30A is different from that of the disc brake device 100 .

As shown in FIG. 5 , the protruding portion 32 of the control member 30A is located on the outer peripheral side of the brake rotor 20A. Accordingly, the recesses 222 of the brake rotor 20A provided on the fins 22 are also located on the outer peripheral side of the brake rotor 20A.

In the example of this embodiment, the concave portion 222 has a substantially rectangular shape when viewed in the longitudinal section of the brake rotor 20A. That is, the concave portion 222 is defined by the bottom surface 222b and the side surfaces 222s disposed 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 rear surface 212 of the disc main body 21 as in the first embodiment. The concave portion 222 accommodates: a portion of the protruding portion 32 corresponding to the fin 22 . The protruding portion 32 is not in contact with the back surface 212 of the disc body 21 and the bottom surface 222 b of the concave portion 222 . However, the protrusion 32 can also contact at least one of the two side surfaces 222s of the recess 222 . In the case where the protruding portion 32 is urged to contact one or both of the side surfaces 222s of the recessed portion 222, deformation of the protruding portion 32 at the time of rotation is suppressed. Furthermore, positioning of the brake rotor 20A by the control member 30A can be easily performed.

In this 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 32 e of the protruding portion 32 is arranged on the inside of the outer peripheral edge of the disc body 21 in the radial direction.

In the disc brake device 100A of this embodiment, the ventilation path defined by the rotating member 10 , the fins 22 of the brake disc 20A, and the disc body 21 is also partially closed by the protruding portion 32 of the control member 30A. Therefore, the air volume in the air passage can be limited, and the aerodynamic sound generated when the railway vehicle is running can be reduced.

The protruding portion 32 of the control member 30A passes through the recessed portion 222 of the fin 22 and extends in the circumferential direction over 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 it is not necessary to form the protruding portion 32 avoiding the fin 22 . According to this, the manufacture of the control member 30A can be performed simply, and the labor and cost required for the processing of the control member 30A can be reduced.

As mentioned above, although the embodiment of this invention was described, this invention is not limited to the said embodiment, Various changes are possible in the range which does not deviate from the summary of this invention.

In the first embodiment described above, the protruding portion 32 of the control member 30 is located on the inner peripheral side of the brake rotor 20 . In the second embodiment described above, the protruding portion 32 of the control member 30A is located on the outer peripheral side of the brake rotor 20A. However, the positions of the protrusions 32 are not limited to the examples shown in these embodiments. For example, the protruding portion 32 may be appropriately moved in the radial direction within a 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 any position 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 coupling member 40 .

In the above embodiment, the concave portion 222 provided in the fin 22 has an L-shape or a rectangle when viewed in the longitudinal section of the brake rotor 20, 20A. However, the shape of the concave portion 222 is not limited thereto. The concave portion 222 may also have a shape along the protruding portion 32 of the control member 30, 30A.

In the above-described embodiment, the base plate 31 and the protruding portion 32 of the control members 30 and 30A are substantially annular in plan view. However, the control members 30 and 30A may be divided into plural pieces in the circumferential direction. For example, the control members 30 and 30A may be divided into two or four in the circumferential direction.

100,100A: disc brake device 10: Rotating member 20,20A: brake disc 21: Disc body 212: back 22: fins 221: top surface 222: Concave 30,30A: control components 31: Base plate 32: protrusion

[ Fig. 1] Fig. 1 is a longitudinal sectional view showing a schematic structure of a disc brake device for a railway vehicle according to a first embodiment. [FIG. 2] FIG. 2 is a rear view of a brake disc contained in the disc brake device shown in FIG. 1. [FIG. [ Fig. 3] Fig. 3 is a top view of a control member included in the disc brake device shown in Fig. 1 . [ Fig. 4] Fig. 4 is a sectional view taken along line IV-IV of Fig. 3 . [ Fig. 5] Fig. 5 is a partial longitudinal sectional view showing a disc brake device for a railway vehicle according to a second embodiment.

10: Rotating member 13: board part 20: Brake disc 21: Disc body 22: fins 24: keyway 24i: inner end 30: Control components 31: Base plate 32: protrusion 32e: outer end 32i: inner end 211: sliding surface 212: back 221: top surface 222: Concave 222b: bottom surface 222s: side 312: opening

Claims (3)

A disc brake device is a disc brake device for railway vehicles, which has: a rotating member mounted on the axle of the aforementioned railway vehicle; The brake disc includes: a ring-shaped disc body with a back surface opposite to the aforementioned rotating member; a plurality of fins arranged radially on the aforementioned back surface; The control member is used to control the amount of air flow between adjacent fins in the circumferential direction of the brake disc among the plurality of fins, and includes: a base plate sandwiched between the rotating member and the fins between; the protruding portion protrudes from the aforementioned base plate toward the aforementioned disc body, On the respective top surfaces of the adjacent fins, a concave portion traversing the fins in the circumferential direction is formed, The protruding portion extends from one of the adjacent fins to the other through the concave portion in the circumferential direction. The disc brake device according to claim 1, wherein the protruding portion is located on the inner peripheral side of the brake disc. The disc brake device according to claim 1, wherein the protruding portion is located on the outer peripheral side of the brake disc.

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