JP7133380B2 - Attitude control device and brake device - Google Patents

Description

The present invention relates to attitude control devices and brake devices.

2. Description of the Related Art There is known a brake device that applies a braking force to a wheel by pressing a brake shoe against the tread surface of the wheel of a railroad vehicle (see, for example, Patent Document 1).

Japanese Utility Model Laid-Open No. 4-46976

By the way, in the brake device described in Patent Document 1, the brake shoe generates frictional vibration when applying the braking force. When this frictional vibration is transmitted to the structure of the brake device, it may be amplified by the resonance of the members, resulting in further vibration noise. It should be noted that not only brake devices that generate a braking force by contacting the tread surface of a wheel, but also brake devices such as caliper brakes and rail brakes in which a brake friction member is pressed against a member to be pressed have the same problem.

In addition, the generation of vibration noise from the brake device varies depending on the railcar on which the brake device is mounted and the running environment, and even if adjustments have been made in advance, vibration noise may occur. Therefore, it is required to suppress the generation of vibration noise even after the brake device is mounted on the railroad vehicle.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and an object of the present invention is to provide a posture control device and a brake device capable of suppressing the generation of vibration noise in a brake device mounted on a railway vehicle. It is in.

A posture control device for solving the above-described problems is a posture control device that suppresses fluctuations in the inclination of a brake shoe head, comprising: a suppressing portion that suppresses the inclination by a frictional force; a holding portion that holds the suppressing portion; and a weight portion provided on the holding portion.

A brake device that solves the above problems is a brake device that applies a braking force by pressing a brake shoe against the tread surface of a wheel, and is a posture control device that suppresses fluctuations in the inclination of the brake shoe head that holds the brake shoe. and the posture control device includes a suppressing section that suppresses the inclination by a frictional force, a holding section that holds the suppressing section, and a weight provided in the holding section.

According to the above configuration, since the weight portion is provided in the holding portion, the mass of the holding portion can be changed by the weight portion, and the load applied to the brake shoe head is changed to suppress the fluctuation of the inclination of the brake shoe head. can do. As a result, it is possible to suppress the generation of vibration noise in the brake device mounted on the railway vehicle.

In the posture control device described above, it is preferable that the suppressing section includes a friction material and a spring that presses the friction material against the brake shoe head.
According to the above configuration, it is possible to easily suppress fluctuations in the inclination of the brake shoe head by utilizing the biasing force of the spring that presses the friction material against the brake shoe head.

In the posture control device described above, it is preferable that the holding portion and the weight portion are integrally formed.
According to the above configuration, the load applied to the brake shoe head can be easily changed by replacing the holding portion.

In the attitude control device described above, it is preferable that the holding section includes an attachment/detachment section to which the weight section is attachable and detachable.
According to the above configuration, the weight section can be easily replaced by the attachment/detachment section.

In the attitude control device described above, it is preferable that the attachment/detachment portion has a fastening structure using a fixture.
According to the above configuration, it is possible to easily replace the weight portion through the attachment/detachment operation of the fixture.

In the posture control device described above, it is preferable that the brake shoe head has a fitting portion into which the holding portion can be fitted, and that a cushioning material is provided between the fitting portion and the holding portion. .
According to the above configuration, the cushioning material absorbs collisions and vibrations generated between the fitting portion and the holding portion of the brake shoe head, thereby suppressing the generation of collision sounds and vibration sounds.

ADVANTAGE OF THE INVENTION According to this invention, the vibration noise which generate|occur|produces when a braking force is provided to a wheel can be suppressed.

1 is a side view showing a schematic configuration of a posture control device and a brake device according to a first embodiment; FIG. FIG. 2 is an enlarged cross-sectional view taken along line 2-2 of FIG. 1, showing a schematic configuration of the brake device of the same embodiment; The graph which shows the vibration characteristic of the brake device of the same embodiment. Sectional drawing which shows exchange of the spring box of the brake device of the same embodiment. Sectional drawing which shows exchange of the spring box of the brake device of the same embodiment. Sectional drawing which shows exchange of the spring box of the brake device of the same embodiment. Sectional drawing which shows exchange of the spring box of the brake device of the same embodiment. Sectional drawing which shows schematic structure of 2nd Embodiment of a posture control apparatus and a brake device. Sectional drawing which shows exchange of the weight part of the brake device of the same embodiment. Sectional drawing which shows exchange of the weight part of the brake device of the same embodiment. Sectional drawing which shows exchange of the weight part of the brake device of the same embodiment. Sectional drawing which shows exchange of the weight part of the brake device of the same embodiment. Sectional drawing which shows exchange of the weight part of the brake device of the same embodiment.

(First embodiment)
A first embodiment of a posture control device and a braking device will be described below with reference to FIGS. 1 to 7. FIG. Note that the attitude control device is provided in the brake device.

As shown in FIG. 1, the braking device 100 is a device that applies a braking force by pressing a brake shoe 110 against a tread surface 10A of a wheel 10 of a railway vehicle. and a braking force application unit 150 .

The driving force generator 120 is a brake cylinder device that generates driving force for driving the brake shoe 110 . The driving force generator 120 has a cylinder 121 to which compressed air is supplied as pressure fluid, a piston 122 that moves within the cylinder 121 according to the amount of compressed air supplied, and a spring 123 that biases the piston 122. ing. The biasing force of the compressed air and the biasing force of the spring 123 act on the piston 122 in opposite directions.

The driving force transmission unit 130 is a device that transmits the driving force generated by the driving force generation unit 120 to the brake shoe head 151 that holds the brake shoe 110 using the principle of leverage. The driving force transmission portion 130 has a lever 131 , a first connection pin 132 , a second connection pin 133 , a push rod 134 , a brake shoe hanger 135 and a gap adjustment portion 136 .

The lever lever 131 is a member that converts linear motion of the piston 122 into rotary motion. A concave spherical through-hole 137 is formed in the middle of the lever lever 131 in the longitudinal direction.
The first connecting pin 132 is a member that rotatably connects the tip of the piston 122 and the first end 131A of the lever 131 .

The second connecting pin 133 is a member that rotatably connects the second end 131B of the lever 131 and the fulcrum 138 .
The push rod 134 is a member that converts the rotary motion of the lever 131 into linear motion. The push rod 134 linearly moves in the direction of moving the brake shoe 110 away from the tread surface 10A of the wheel 10 when the compressed air is discharged and the piston 122 is biased by the spring 123 to move. On the other hand, the push rod 134 linearly moves in the direction to bring the brake shoe 110 closer to the tread 10A of the wheel 10 when the compressed air is supplied and the piston 122 moves. The tip of the push rod 134 is substantially L-shaped. A corner of the L-shaped portion of the push rod 134 is connected to a fixed shaft 139 fixed to the brake shoe head 151 . The fixed shaft 139 is a bolt and fastened with a nut.

The brake shoe suspension 135 is a member that supports the brake shoe head 151 that holds the brake shoe 110 so that it can move back and forth. A first end portion of the brake shoe suspension 135 is rotatably connected to a fixed portion 140 provided in the driving force transmission portion 130 by a third connecting pin 141 . A second end of the brake shoe hanger 135 is rotatably connected to a fixed shaft 139 fixed to the tip of the push rod 134 . A posture control device 160 is provided below the fixed shaft 139 at the tip of the push rod 134 to prevent the push rod 134 from tilting when a braking force is applied. Note that the attitude control device 160 suppresses fluctuations in the inclination of the brake shoe head 151 .

As shown in FIG. 2, the posture control device 160 has a spring box 161, a friction plate 162 as a friction material, a coil spring 163, and a receiving portion 164.
The spring box 161 has a cylindrical portion 161A and a weight portion 161B integrally formed at the end portion in the extending direction of the cylindrical portion 161A. Note that the spring box 161 corresponds to the holding portion. The friction plate 162 and the coil spring 163 function as a suppressor.

The cylindrical portion 161A is fitted into a fitting hole 152 formed in the brake shoe head 151 from the tip side. Specifically, the brake shoe head 151 includes a pair of plate members 151A and 151B. A circular first fitting hole 152A penetrates the first plate member 151A in the thickness direction. The cylindrical portion 161A is inserted into the first fitting hole 152A from the outside of the pair of plate members 151A and 151B. The tubular portion 161A penetrates the first fitting hole 152A. An O-ring 165, which is an example of a cushioning material, is in contact with the outer peripheral surface of the tubular portion 161A and the inner peripheral surface of the first fitting hole 152A. The fitting hole 152 (152A) corresponds to a fitting portion into which the spring box 161, which is the holding portion, can be fitted.

The weight portion 161B is formed with a cylindrical recess 161C concentric with the cylindrical portion 161A. A through hole 161D is formed in the bottom surface of the recess 161C. A fixing bolt 166 is inserted into the through hole 161D. A head 166A of the fixing bolt 166 is engaged with the inner bottom surface of the recess 161C. A shaft portion 166B of a fixing bolt 166 passes through the through hole 161D. An annular friction plate 162 is mounted around the shaft portion 166B of the fixing bolt 166 .

A pair of friction plates 162 are provided so as to sandwich the push rod 134 from both sides of the fixed shaft 139 in the axial direction. More specifically, the push rod 134 has a portion 134A extending downward from a portion supporting the fixed shaft 139. As shown in FIG. The friction plate 162 is in contact with the tip of the extension portion 134A to restrict rotation between the extension portion 134A of the push rod 134 and the friction plate 162. As shown in FIG. An insertion hole 134B is formed at the distal end of the extending portion 134A of the push rod 134. As shown in FIG. A shaft portion 166B of a fixing bolt 166 passes through the insertion hole 134B. A slight gap is interposed between the inner peripheral surface of the insertion hole 134B and the outer peripheral surface of the shaft portion 166B of the fixing bolt 166. As shown in FIG. Also, the friction plate 162 is movable in the axial direction of the fixing bolt 166 .

The pair of friction plates 162 has a two-layer structure, and the first layer 162α that contacts the push rod 134 is made of an elastic material that has a relatively high frictional resistance against the push rod 134. As shown in FIG. Also, the second layer 162β of the friction plate 162 is made of a rigid material.

A first coil spring 163A is interposed between the first friction plate 162A of the pair of friction plates 162 and the spring box 161, which is provided close to the spring box 161. As shown in FIG. The first friction plate 162A brings the first layer 162α into close contact with the push rod 134 based on the biasing force transmitted from the first coil spring 163A to the second layer 162β.

Of the pair of friction plates 162 , the second friction plate 162 B forming a pair with the first friction plate 162 A is arranged facing the receiving portion 164 in the axial direction of the fixing bolt 166 . The receiving portion 164 has a cylindrical shape with a bottom. The brake shoe head 151 has a pair of plate members 151A and 151B. The receiving portion 164 is fitted from the tip side into the second fitting hole 152B formed in the second plate member 151B. A second coil spring 163B is interposed between the inner bottom surface of the receiving portion 164 and the second friction plate 162B. The second friction plate 162B brings the first layer 162α into close contact with the push rod 134 based on the biasing force transmitted from the second coil spring 163B to the second layer 162β.

A through hole 167 is formed in the bottom surface of the receiving portion 164 . A shaft portion 166 B of a fixing bolt 166 is inserted into the through hole 167 . A shaft portion 166 B of the fixing bolt 166 protrudes from the through hole 167 . A nut 168 is screwed onto the portion of the shaft portion 166B protruding from the through hole 167 .

Returning to FIG. 1, the gap adjusting portion 136 is a cylindrical member that adjusts the gap between the brake shoe 110 and the tread 10A of the wheel 10. As shown in FIG. A female screw portion 136</b>A is formed on the inner peripheral portion of the gap adjusting portion 136 . The female threaded portion 136A is screwed with a male threaded portion 134C formed at the proximal end portion of the push rod 134 . A convex spherical bearing portion 136</b>B is formed on the outer peripheral portion of the gap adjusting portion 136 . The spherical bearing portion 136B is rotatably supported by the spherical through hole 137 of the lever 131. As shown in FIG. In the gap adjustment portion 136, the position of the spherical bearing portion 136B in the front-rear direction with respect to the push rod 134 changes when the amount of screwing between the male thread portion 134C and the female thread portion 136A is adjusted. As a result, the stroke amount of the push rod 134 from the spherical through-hole 137 is changed, and the distance between the brake shoe 110 and the tread 10A of the wheel 10 is changed.

The braking force applying section 150 has a brake shoe head 151 and a brake shoe 110 .
The brake shoe head 151 is a member that holds the brake shoe 110, and is made of a metal body that has a generally arcuate external shape. The brake shoe head 151 has a tip surface 151C having a substantially arcuate shape. A brake shoe 110 is attached to the tip surface 151C of the brake shoe head 151. As shown in FIG.

The brake shoe 110 is a brake friction member that is pressed against the tread surface 10A of the wheel 10 to generate a braking force. The brake shoe 110 is a plate-like member having a substantially arc-shaped external shape, and has a friction surface 110A that contacts the tread surface 10A of the wheel 10 and a back surface 110B that contacts the tip surface 151C of the brake shoe head 151. there is The brake shoe 110 moves in the direction of pressing the friction surface 110A against the tread surface 10A of the wheel 10 together with the brake shoe head 151 when applying the braking force. On the other hand, when releasing the application of the braking force, the brake shoe head 151 and the friction surface 110A move away from the tread surface 10A of the wheel 10. As shown in FIG.

Next, the action of the braking device 100 will be described. In particular, the action when applying the braking force will be described.
When applying the braking force, the friction surface 110A of the brake shoe 110 is pressed against the tread surface 10A of the wheel 10. - 特許庁Then, the frictional vibration generated by the brake shoe 110 is transmitted to the structure of the brake device 100 including the brake shoe head 151 . At this time, if the frequency of the frictional vibration generated by the brake shoe 110 coincides with the resonance frequency of the structure of the brake device 100, the structure of the brake device 100 will resonate. As a result, as indicated by the broken line in FIG. 3, the structural body of the brake device 100 performs simple oscillation with the resonance frequency as the peak frequency. As a result, the maximum value of amplitude tends to increase, and the brake device 100 tends to generate a large vibration noise.

In this respect, the weight portion 161B is connected to the brake shoe head 151 via the coil spring 163, and when the structural body of the brake device 100 resonates, the weight portion 161B vibrates vertically and horizontally in a disturbed direction (disturbance). vibration). As a result, as indicated by the solid line in FIG. 3, the peak frequencies of the simple harmonic motion exhibited by the structure of the brake device 100 are likely to be dispersed into a plurality of peak frequencies. As a result, the maximum value of the amplitude is suppressed, and the vibration noise generated from the braking device is reduced.

Further, when a large vibration sound is generated without the weight portion 161B, the mass of the spring box 161 is increased by the weight portion 161B, and the load applied to the brake shoe head 151 and the brake shoe 110 increases. , the spring box 161, the brake shoe head 151, and the brake shoe 110 are suppressed. As a result, the vibration noise generated when the brake shoe 110 is pressed against the wheel 10 to apply the braking force is suppressed.

Next, replacement of the weight portion 161B attached to the brake shoe head 151, that is, the spring box 161 will be described.
FIG. 4 shows an initial state in which the posture control device 160 is attached to the brake shoe head 151. As shown in FIG.

Here, as shown in FIG. 5, when replacing the weight portion 161B attached to the brake shoe head 151, first, the fixing bolt 166 is removed from the attitude control device 160. As shown in FIG.
Subsequently, as shown in FIG. 6, the spring box 161 is removed from the first fitting hole 152A of the first plate member 151A.

After that, as shown in FIG. 7, a new spring box 161 integrally formed with a weight portion 161Bα having a mass different from that of the weight portion 161B is attached to the first fitting hole 152A of the first plate member 151A. Then, the fixing bolt 166 is passed through the spring box 161, the friction plate 162, and the receiving portion 164 and fastened.

In this manner, the weights 161B and 161Bα can be easily attached to the brake shoe head 151 through a series of operations for attaching and detaching the fixing bolt 166 to the posture control device 160. FIG. Further, by easily changing the weights 161B and 161Bα attached to the brake shoe head 151, the spring box 161 and thus the mass of the brake shoe head 151 can be easily changed.

As described above, according to this embodiment, the following effects can be obtained.
(1) Since the spring box 161 is provided with the weight portion 161B, the mass of the spring box 161 can be changed by the weight portion 161B. occurrence is suppressed. As a result, it is possible to suppress the generation of vibration noise in the brake device 100 mounted on the railway vehicle.

(2) A spring box 161 is connected via a coil spring 163 to the brake shoe head 151 that holds the brake shoe 110, and the spring box 161 and the weight portion 161B are integrally formed. Thus, by replacing the spring box 161, the load applied to the brake shoe head 151 can be easily changed. Also, the movement pattern of the weight 161B with respect to the brake shoe head 151 becomes diverse. Therefore, even if the vibration when the brake shoe 110 is pressed against the tread surface 10A of the wheel 10 of the railway vehicle is transmitted to the brake shoe head 151, the frequency peak of such vibration is dispersed by the weight portion 161B. As a result, the peak of the vibration magnitude of the brake shoe head 151 is suppressed, and the vibration noise generated when the brake shoe 110 is pressed against the tread surface 10A of the wheel 10 to apply the braking force is suppressed.

(3) The brake shoe head 151 has a fitting hole 152 into which the spring box 161 can be fitted, and an O-ring 165 is provided between the fitting hole 152 and the spring box 161 . As a result, the O-ring 165 absorbs collisions and vibrations that occur between the fitting hole 152 of the brake shoe head 151 and the spring box 161, thereby suppressing the generation of collision sounds and vibration sounds.

(Second embodiment)
A second embodiment of the brake device will be described below with reference to FIGS. 8 to 13. FIG. The second embodiment differs from the first embodiment in the fastening structure of the weight portion to the spring box. Therefore, in the following description, the configuration different from that of the first embodiment will be mainly described, and redundant description of the configuration that is the same as or corresponding to that of the first embodiment will be omitted.

As shown in FIG. 8, in the second embodiment, a fixing bolt 266 is provided in place of the receiving portion 164 fitted in the fitting hole 152B of the second plate member 151B in the first embodiment. . A stepped structure 267 is provided in the middle of the fixing bolt 266 in the axial direction. The stepped structure 267 is engaged with the second friction plate 162B in the axial direction of the fixing bolt 266. As shown in FIG.

Further, in the second embodiment, the spring box 261 has a cylindrical shape with a bottom, and is configured separately from the weight portion 261B. A through hole 262 is formed in the bottom surface of the spring box 261 . A shaft portion 266 A of a fixing bolt 266 is inserted into the through hole 262 . A shaft portion 266 A of the fixing bolt 266 protrudes from the through hole 262 . A nut 268 is screwed onto the projecting portion of the shaft portion 266A of the fixing bolt 266 .

The weight portion 261B has an annular shape. A first stepped portion 261DA and a second stepped portion 261DB are formed on the inner surface of the center hole 261C of the weight portion 261B. A first inner peripheral portion 261CA having the smallest inner diameter in the center hole 261C of the weight portion 161B is fitted to the outer peripheral portion 261A of the spring box 261 from the outside. That is, the outer peripheral portion 261A of the spring box 261 functions as an attachment/detachment portion to which the weight portion 261B can be attached/detached. Note that the bottom surface 261S of the spring box 261 coincides with the end of the first inner circumferential portion 261CA. A bottom surface 261S of the spring box 261 is flush with the first stepped portion 261DA.

A bottomed tubular fixture 270 is fitted in a second inner peripheral portion 261CB of the center hole 261C of the weight portion 261B, which extends continuously from the first inner peripheral portion 261CA. The fixture 270 accommodates a fixing bolt 266 protruding from the through hole 262 and a nut 268 screwed onto the fixing bolt 266, and has its open end in contact with the first stepped portion 261DA. As a result, the weight portion 261B is fixed to the spring box 261 by preventing the weight portion 261B from falling off from the spring box 261 .

Next, replacement of the weight portion 261B attached to the brake shoe head 151 will be described.
FIG. 9 shows the initial state in which the anti-tilt mechanism 260 is attached to the brake shoe head 151 .
Here, as shown in FIG. 10, when replacing the weight portion 261B attached to the brake shoe head 151, first, the fixture 270 is removed from the weight portion 261B.

Subsequently, as shown in FIG. 11, the weight portion 261B is removed from the spring box 261. Then, as shown in FIG.
Then, as shown in FIG. 12, a new weight portion 261Bα having a mass different from that of the previously described weight portion 261B is fitted to the spring box 261 from the outside.

Thereafter, as shown in FIG. 13, the weight portion 261Bα is fixed to the spring box 261 by fitting the fixture 270 to the second inner peripheral portion 261CB of the weight portion 261Bα.
In this way, the weights 261B, 261Bα attached to the brake shoe head 151 can be easily changed without removing the spring box 261 from the brake shoe head 151 through a series of attachment and detachment operations of the fixture 270 with respect to the weights 261B, 261Bα. Thus, the mass of the brake shoe head 151 can be easily changed.

As described above, according to the present embodiment, the following effects can be obtained in addition to the effects (1) and (2) of the first embodiment.
(4) Weight portions 261B and 261Bα are attachable and detachable to the outer peripheral portion 261A of the spring box 261 . Thereby, the weight portions 261B and 261Bα having masses corresponding to the types of the brake shoe 110 and the brake shoe head 151 can be easily exchanged.

(5) Weight portions 261B and 261Bα are fixed to the spring box 261 using fixtures 270 . Accordingly, the weight portions 261B and 261Bα can be easily exchanged through the attachment/detachment operation of the fixture 270 .

(Other embodiments)
Each of the above embodiments can also be implemented in the following forms.
- In the above-described second embodiment, a cushioning material such as an O-ring may be provided between the spring box 261 and the first fitting hole 152A of the first plate member 151A.

- In each of the above embodiments, a slight gap may be provided between the spring boxes 161 and 261 and the fitting hole 152A of the first plate member 151A.
- In the first embodiment, a slight gap may be provided between the receiving portion 164 and the second fitting hole 152B of the second plate member 151B.

- In the first embodiment, the O-ring between the spring box 161 and the first fitting hole 152A of the first plate member 151A may be omitted.
- In the above-described second embodiment, the attachment/detachment structure between the spring box 261 and the weight portion 261B is not limited to the fastening structure using the fixture 270. There may be.

- In each of the above embodiments, it is applied to a brake device that generates a braking force by contacting the tread surface 10A of the wheel 10, but it is applied to a brake device such as a caliper brake or a rail brake in which a brake friction member is pressed against a pressed member. may apply.

DESCRIPTION OF SYMBOLS 100... Brake device, 10... Wheel, 110... Bracer, 120... Driving force generation part, 130... Driving force transmission part, 151... Braking head, 152... Fitting hole as a fitting part, 160... Attitude control apparatus , 161, 261... Spring box as holding part 161A... Cylindrical part as holding part 161A, 161B, 161Bα, 261B, 261Bα... Weight part 131... Coil spring as suppressing part 162... Friction material and suppressing part 165 O-ring as buffer material 261A Peripheral portion as detachable portion 270 Fixing tool.

Claims (11)

A posture control device that suppresses fluctuations in the inclination of the brake shoe head,
a suppressing portion that suppresses the inclination by a frictional force;
a holding portion that holds the suppressing portion;
a weight portion provided in the holding portion ;
The attitude control device , wherein the suppressing section includes a friction material and a spring that presses the friction material against the brake shoe head . A posture control device that suppresses fluctuations in the inclination of the brake shoe head,
a suppressing portion that suppresses the inclination by a frictional force;
a holding portion that holds the suppressing portion;
a weight portion provided in the holding portion ;
The posture control device , wherein the holding section includes an attachment/detachment section to which the weight section is attachable and detachable . A posture control device that suppresses fluctuations in the inclination of the brake shoe head,
a suppressing portion that suppresses the inclination by a frictional force;
a holding portion that holds the suppressing portion;
a weight portion provided in the holding portion ;
The brake shoe head has a fitting portion capable of fitting the holding portion,
A posture control device , wherein a cushioning material is provided between the fitting portion and the holding portion . The attitude control device according to claim 2 or 3 , wherein the suppressing portion includes a friction material and a spring that presses the friction material against the brake shoe head. The posture control device according to claim 1 or 3 , wherein the holding section includes an attachment/detachment section to which the weight section is attachable and detachable. The brake shoe head has a fitting portion capable of fitting the holding portion,
The attitude control device according to claim 1 or 2 , wherein a cushioning material is provided between the fitting portion and the holding portion. The attitude control device according to any one of claims 1 to 6, wherein the holding portion and the weight portion are integrally formed. The attitude control device according to claim 2 or 5 , wherein the attachment/detachment portion is a fastening structure using a fixture. A brake device that applies a braking force to a wheel by pressing the brake shoe against the tread surface of the wheel,
A posture control device that suppresses fluctuations in the inclination of the brake shoe head holding the brake shoe,
The posture control device includes a suppressing unit that suppresses the inclination by a frictional force;
a holding portion that holds the suppressing portion;
a weight portion provided in the holding portion ;
The restraining portion includes a friction material and a spring that presses the friction material against the brake shoe head . A brake device that applies a braking force to a wheel by pressing the brake shoe against the tread surface of the wheel,
A posture control device that suppresses fluctuations in the inclination of the brake shoe head holding the brake shoe,
The posture control device includes a suppressing unit that suppresses the inclination by a frictional force;
a holding portion that holds the suppressing portion;
a weight portion provided in the holding portion ;
The holding section includes an attachment/detachment section to which the weight section is attachable and detachable . Braking device. A brake device that applies a braking force to a wheel by pressing the brake shoe against the tread surface of the wheel,
A posture control device that suppresses fluctuations in the inclination of the brake shoe head holding the brake shoe,
The posture control device includes a suppressing unit that suppresses the inclination by a frictional force;
a holding portion that holds the suppressing portion;
a weight portion provided in the holding portion ;
The brake shoe head has a fitting portion capable of fitting the holding portion,
A cushioning material is provided between the fitting portion and the holding portion . Brake device.

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