Brake shoe mounting structure for unit brake device and brake shoe for unit brake device

Abstract

To provide a brake shoe mounting structure of a unit brake device capable of detaching a brake shoe from a shoe head in a state where a pipe is connected to a dust collection unit.SOLUTION: A brake shoe mounting structure of a unit brake device comprises: a shoe head 37 provided with a recess part 37A into which a mounting plate 44 of the brake shoe 2 is fitted; a shoe cotter 46 that is inserted into the recess part 37A and an opening part formed in the mounting plate 44, to mount the brake shoe 2 to the shoe head 37; and a first dust collection unit 50A and a second dust collection unit 50B that collect wear powder generated when the brake shoe 2 is pressed against a tread. The first dust collection unit 50A and the second dust collection unit 50B are provided outside an insertion path of the shoe cotter 46.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a brake shoe mounting structure for a unit brake device and a brake shoe for a unit brake device. [Background technology]

[0002] In the caliper brake device described in Patent Document 1, a groove is provided in the brake pad, and a through hole communicating with the groove is provided in the center of a shoe holder that supports the brake pad. The through hole is connected to a negative pressure source via a pipe that is connected to the back surface of the shoe holder. Wear powder generated when the brake pad is pressed against the disc is sucked in via the through hole and the pipe. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2020-530087 Summary of the Invention [Problem to be solved by the invention]

[0004] In a unit brake device, the brake shoe is pressed against the wheel tread to brake the vehicle. The convex portion of the brake shoe fits into the concave portion of the shoe head of the unit brake device, and the shoe cotter is inserted into the opening formed in the concave portion and the convex portion, and the brake shoe is attached to the shoe head. In other words, when the brake shoe is attached to the shoe head by the shoe cotter, the shoe cotter is located between the brake shoe and the shoe head. Therefore, if a pipe connected to a negative pressure source is provided on the shoe cotter insertion path, it is necessary to disconnect the pipe before removing the brake shoe when replacing the brake shoe. [Means for solving the problem]

[0005] The brake shoe mounting structure of a unit brake device that solves the above-mentioned problems comprises a shoe head having a recess into which a convex portion of the brake shoe fits, a shoe cotter that is inserted into an opening formed in the recess and the convex portion to attach the brake shoe to the shoe head, and a dust collection section that collects wear powder generated when the brake shoe is pressed against the wheel tread, the dust collection section being located outside the insertion path of the shoe cotter.

[0006] According to the above-mentioned configuration, the dust collecting portion is provided outside the insertion path of the shoe cotter that passes through the openings formed in the recessed portion of the shoe head and the protruding portion of the brake shoe. Therefore, the brake shoe can be detached from the shoe head with the piping connected to the dust collecting portion.

[0007] Regarding the brake shoe mounting structure of the above-mentioned unit brake device, it is preferable that the shoe cotter is an L-shaped shoe cotter and further has a locking portion that is movable between a restricting position that restricts the displacement of the shoe cotter inserted into the openings formed in the recess and the protrusion, and a non-restricting position that does not restrict the displacement of the shoe cotter, and that the dust collection portion is provided outside the insertion path of the shoe cotter and outside the movement path of the locking portion.

[0008] Regarding the brake shoe mounting structure of the above-mentioned unit brake device, it is preferable that the brake shoe is formed with a suction port for sucking up the wear powder, the dust collection section is provided in the shoe head and has a flow path leading to the suction port, and the piping connection port of the flow path connected to a negative pressure source is formed outside the insertion path of the shoe cotter in the shoe head.

[0009] Regarding the brake shoe mounting structure of the above-mentioned unit brake device, it is preferable that the dust collection section has a suction port for sucking up the wear powder and a pipe connecting the suction port to a negative pressure source, and the shoe head has a support section for supporting the pipe, and the support section is provided outside the insertion path of the shoe cotter.

[0010] In the brake shoe mounting structure of the above-mentioned unit brake device, it is preferable that the suction port of the dust collection section is provided on the side opposite to the side on which the flange is located in the width direction of the wheel tread.

[0011] In the brake shoe mounting structure of the above-mentioned unit brake device, it is preferable that the suction port of the dust collection section opens toward the outside of the vehicle when the brake shoe mounting structure is installed on a vehicle having the wheels.

[0012] In the brake shoe mounting structure of the above-mentioned unit brake device, it is preferable that the suction port of the dust collection unit has a first opening and a second opening that open in each of both directions in the traveling direction of a vehicle having the wheel, and the dust collection unit has a switching unit that opens the front opening of the first opening and the second opening and closes the rear opening depending on the traveling direction.

[0013] In the brake shoe mounting structure of the above-mentioned unit brake device, it is preferable that the suction port of the dust collection section is provided in at least one of the upper and lower parts of the shoe head. In the brake shoe mounting structure of the unit brake device, the suction ports are provided on both the upper and lower parts of the shoe head, and the dust collecting unit includes an adjustment valve for adjusting the suction force of each of the suction ports on the upper and lower parts of the shoe head, an acquisition unit for acquiring driving information indicating the driving direction of the wheel, and a rotation direction of the wheel according to the driving information. above The suction force of the suction port on the downstream side is reduced by a predetermined amount, and the suction force of the suction port on the downstream side is reduced by a predetermined amount. under and a control unit that controls the adjustment valve so as to increase the suction force of the suction port on the flow side by the predetermined amount.

[0014] In the brake shoe mounting structure of the unit brake device, it is preferable that the width of the suction port is greater than the width of the brake shoe. In the brake shoe mounting structure of the unit brake device, it is preferable that the suction port covers an outer side of the longitudinal end of the brake shoe.

[0015] In the brake shoe mounting structure of the above-mentioned unit brake device, it is preferable that the piping of the dust collection section is connected to the suction port on the side opposite to the side on which the flange in the width direction of the wheel tread is located.

[0016] The brake shoes of the above-mentioned unit brake device include a curved base plate having a convex portion that fits into a concave portion of a shoe head and a stop plate that engages with the shoe head to position it, and a friction material that is provided on the side of the base plate opposite to the surface on which the convex portion and the stop plate are provided and is pressed against the wheel, and a dust collection section that collects wear powder generated when the friction material is pressed against the wheel is provided on the base plate outside the stop plate along the longitudinal direction of the base plate.

[0017] According to the above-mentioned configuration, the dust collecting portion is provided on the base plate outside the retaining plate along the longitudinal direction of the base plate, so that the brake shoe can be detached from the shoe head while the piping is connected to the suction port.

[0018] The brake shoe of the above-mentioned unit brake device has a curved base plate having a convex portion on one side that fits into a concave portion of the shoe head, and a friction material provided on the side opposite to the surface on which the convex portion of the base plate and a retaining plate that engages with the shoe head to position it are provided, and is pressed against the wheel, the friction material being composed of a composite material whose main component is synthetic resin, and a metal block that penetrates the composite material and is exposed on the friction surface with the wheel, and a suction port is formed in the metal block to suck up wear powder from the friction material.

[0019] According to the above-mentioned configuration, the suction port is formed in the metal block of the brake shoe, which makes it easier to manufacture than when the suction port is formed in synthetic resin, which is more brittle than the metal block of the friction material. Effect of the Invention

[0020] According to the present invention, the brake shoe can be detached from the shoe head while the piping remains connected to the dust collection section or the suction port. [Brief description of the drawings]

[0021] [Figure 1] 1 is a cross-sectional view showing a schematic configuration of a unit brake device according to a first embodiment. [Diagram 2] FIG. 2 is a front perspective view showing the brake shoe mounting structure of the unit brake device of the embodiment. [Diagram 3] FIG. 4 is a rear view showing the brake shoe mounting structure of the unit brake device according to the embodiment. [Figure 4] 4 is a cross-sectional view taken along line 4-4 of FIG. 3, showing the brake shoe mounting structure of the unit brake device according to the embodiment. [Diagram 5] FIG. 13 is a front perspective view showing a brake shoe mounting structure of a unit brake device according to a second embodiment. [Figure 6] FIG. 4 is a rear view showing the brake shoe mounting structure of the unit brake device according to the embodiment. [Figure 7] 7 is a cross-sectional view taken along line 7-7 in FIG. 6, showing the brake shoe mounting structure of the unit brake device according to the embodiment. [Figure 8] FIG. 4 is a bottom view showing the brake shoe mounting structure of the unit brake device according to the embodiment. [Figure 9] FIG. 11 is a front perspective view showing a brake shoe mounting structure of a unit brake device according to a third embodiment. [Figure 10] FIG. 2 is a rear perspective view showing the brake shoe mounting structure of the unit brake device of the embodiment. [Figure 11] FIG. 2 is a side view showing the brake shoe mounting structure of the unit brake device according to the embodiment; [Figure 12] 12 is a cross-sectional view taken along line 12-12 of FIG. 11, showing the brake shoe mounting structure of the unit brake device of the embodiment. [Figure 13] 12 is a cross-sectional view taken along line 12-12 of FIG. 11, showing the brake shoe mounting structure of the unit brake device of the embodiment. [Figure 14] FIG. 13 is a front perspective view showing a brake shoe mounting structure of a unit brake device according to a fourth embodiment. [Figure 15] FIG. 2 is a front view showing the brake shoe mounting structure of the unit brake device according to the embodiment; [Figure 16]FIG. 4 is a front view of a shoe head of the unit brake device according to the embodiment. [Figure 17] FIG. 2 is a side view showing the brake shoe mounting structure of the unit brake device according to the embodiment; [Figure 18] FIG. 13 is a cross-sectional view showing a brake shoe mounting structure of a unit brake device according to a fifth embodiment. [Figure 19] FIG. 2 is a front view showing the brake shoe mounting structure of the unit brake device according to the embodiment; [Figure 20] FIG. 4 is a front view showing a shoe head of the unit brake device according to the embodiment. [Figure 21] FIG. 2 is a cross-sectional view showing a brake shoe of the unit brake device according to the embodiment. [Figure 22] FIG. 13 is a cross-sectional view showing a brake shoe mounting structure of a unit brake device of a sixth embodiment. [Figure 23] FIG. 13 is a cross-sectional view showing a brake shoe mounting structure of a unit brake device according to a seventh embodiment. [Figure 24] FIG. 2 is a cross-sectional view showing the brake shoe mounting structure of the unit brake device according to the embodiment. [Diagram 25] FIG. 13 is a cross-sectional view showing a brake shoe mounting structure of a unit brake device of an eighth embodiment. [Figure 26] FIG. 13 is a plan view showing a dust collecting device according to a ninth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] (First embodiment) A first embodiment of a brake shoe mounting structure for a unit brake device will be described below with reference to Figures 1 to 4. The unit brake device is attached to a bogie of a railway vehicle, and applies brake pressure to the wheel tread to brake the railway vehicle.

[0023] (Unit brake device 1) As shown in Fig. 1, the unit brake device 1 includes an air brake cylinder 20 that outputs a braking force by air. The unit brake device 1 includes a transmission drive unit 30 that transmits the braking force output from the air brake cylinder 20 to a shoe head 37. The transmission drive unit 30 includes a hollow body 31.

[0024] (Air brake cylinder 20) The air brake cylinder 20 includes a cylindrical cylinder 21 with a bottom. The cylinder 21 is connected to the left side of the main body 31 in the figure. The air brake cylinder 20 includes a release spring 22 and a piston 23 biased by the release spring 22. The tip of the piston 23 protrudes into the main body 31 and is rotatably connected to a brake lever 32 via a connecting pin 23A. The brake lever 32 rotates around a support shaft 33 fixed to the main body 31. One end of the brake lever 32 (upper side in the figure) is connected to the piston 23.

[0025] A supply port 20A is provided at the bottom (left side in the figure) of the cylinder 21 to supply compressed air into the cylinder 21. The compressed air is supplied to an operating chamber 21A surrounded by the cylinder 21 and the piston 23. When compressed air is supplied to the operating chamber 21A of the air brake cylinder 20, the piston 23 moves in a direction protruding from the cylinder 21 (right side in the figure), causing the brake lever 32 to rotate clockwise in the figure. On the other hand, when compressed air is discharged from the operating chamber 21A of the air brake cylinder 20, the piston 23 moves by the release spring 22 to the bottom side of the cylinder 21 (left side in the figure), causing the brake lever 32 to rotate counterclockwise in the figure.

[0026] (Transmission drive unit 30) The transmission drive unit 30 comprises the brake lever 32, a spherical bearing 34 which fits into a spherical through hole 32A provided at the other end of the brake lever 32, and a cylindrical sheath rod 35 to whose outer circumferential surface the spherical bearing 34 is fixed. The transmission drive unit 30 comprises a push rod 36 which is provided by being screwed into the inner surface of the sheath rod 35. The base end side of the push rod 36 is screwed into the inside of the sheath rod 35. A shoe head 37 is rotatably attached to the tip side of the push rod 36 via a connecting pin 36A. The main body 31 is connected to the connecting pin 36A The shoe head 37 is connected to a connecting pin 38. 36A The shoe head 37 is rotatably attached to a hanger 38 via a brake shoe 23. The brake shoe 23 is attached to the shoe head 37 and is pressed against a tread 3A of a wheel 3 of a railway vehicle.

[0027] When the brake lever 32 rotates clockwise around the support shaft 33, the brake shoe 2 together with the sheath bar 35 and the push rod 36 is pushed towards the tread 3A of the wheel 3, and the brake shoe 2 is pressed against the tread 3A of the wheel 3, braking the rotation of the wheel 3. When the brake lever 32 is rotated clockwise by the air brake cylinder 20, the greater the amount of rotation, the greater the amount by which the brake shoe 2 is pressed against the tread 3A of the wheel 3, in other words, the greater the amount of friction. On the other hand, when the brake lever 32 rotates counterclockwise around the support shaft 33, the brake shoe 2 together with the sheath bar 35 and the push rod 36 moves away from the tread 3A of the wheel 3, and the braking of the rotation of the wheel 3 is released.

[0028] (Dust collector) When the brake shoe 2 is pressed against the tread 3A of the wheel 3, wear powder is generated. For this reason, a dust collector for collecting the wear powder is provided in the unit brake device 1. The dust collector includes a negative pressure source (not shown) that generates negative pressure, and a dust collector connected to the negative pressure source by piping. The negative pressure source is provided in the body of the railway vehicle.

[0029] 2, the dust collecting section is provided on the brake shoe 2 and the shoe head 37. The dust collecting section includes a first dust collecting section 50A and a second dust collecting section 50B. The first dust collecting section 50A is provided near the upper portion of the brake shoe 2. The second dust collecting section 50B is provided near the lower portion of the brake shoe 2.

[0030] (Bracelets 2) As shown in Figures 3 and 4, the brake shoe 2 includes a friction material 41 and a base metal 42. The friction material 41 is fixed to the front side of the base metal 42. The base metal 42 includes a base plate 43, an attachment plate 44, and a stop plate 45. The base plate 43 is a curved plate extending along the shoe head 37. The attachment plate 44 is a plate member that is M-shaped in side view and is provided on the back surface of the base plate 43. The attachment plate 44 corresponds to a convex portion that fits into the concave portion 37A of the shoe head 37. The stop plate 45 is a member that protrudes from the back surface of the base plate 43 and engages with the shoe head 37 for positioning.

[0031] (Bracelet mounting structure) The brake shoe 2 is attached to the shoe head 37 by a shoe cotter 46. The shoe cotter 46 is inserted into the recess 37A of the shoe head 37 and an opening formed in the mounting plate 44. The shoe cotter 46 is L-shaped. The shoe head 37 has a locking portion 47. The locking portion 47 is movable between a restricting position where the locking portion 47 restricts the displacement of the shoe cotter 46 inserted into the recess 37A of the shoe head 37 and the opening formed in the mounting plate 44, and a non-restricting position where the displacement of the shoe cotter 46 is not restricted. The locking portion 47 rotates about a rotation axis 47A.

[0032] The first dust collecting section 50A and the second dust collecting section 50B are provided outside the insertion path of the shoe cotter 46 and outside the movement path of the locking section 47. A first suction port 51A for sucking wear powder is formed near the upper part of the brake shoe 2. The first dust collecting section 50A is provided near the upper part of the shoe head 37 and has a first flow path 52A connected to the first suction port 51A. The first flow path 52A penetrates the friction material 41 and is connected to a first through hole 53A formed in the base plate 43. The first flow path 52A is provided with a first piping connection port 54A connected to a negative pressure source. The first piping connection port 54A is formed outside the insertion path of the shoe cotter 46 in the shoe head 37 and outside the movement path of the locking section 47.

[0033] A second suction port 51B for sucking wear powder is formed near the bottom of the brake shoe 2. The second dust collecting section 50B is provided near the bottom of the shoe head 37 and has a second flow passage 52B that is connected to the second suction port 51B. The second flow passage 52B penetrates the friction material 41 and is connected to a second through hole 53B formed in the base plate 43. A second piping connection port 54B that is connected to a negative pressure source is provided in the second flow passage 52B. The second piping connection port 54B is formed outside the insertion path of the shoe cotter 46 in the shoe head 37 and outside the movement path of the locking portion 47.

[0034] 3, the range A1 indicated by the dashed line is the insertion path of the shoe cotter 46. The first piping connection port 54A is provided near the upper part of the rear surface of the shoe head 37, between the range A1 and the stop plate 45 protruding from the rear surface of the shoe head 37. The second piping connection port 54B is provided near the lower part of the rear surface of the shoe head 37, between the stop plate 45 protruding from the rear surface of the shoe head 37 and the range A1.

[0035] (action) Next, the operation of the dust collecting device configured as above will be described with reference to FIG. When the negative pressure source is operated, the first dust collecting unit 50A and the second dust collecting unit 50B suck in the wear powder. The wear powder located near the first suction port 51A and the second suction port 51B is sucked in. The wear powder sucked into the first suction port 51A passes through the first flow path 52A and the first piping 10A and is collected. The wear powder sucked into the second suction port 51B passes through the second flow path 52B and the second piping 10B and is collected.

[0036] The first dust collecting section 50A and the second dust collecting section 50B are not positioned in the insertion path of the shoe cotter 46 and the movement path of the locking section 47, and neither the first pipe connection port 54A nor the second pipe connection port 54B are positioned in the insertion path of the shoe cotter 46 and the movement path of the locking section 47. Therefore, when replacing the brake shoe 2, the brake shoe 2 can be removed from the shoe head 37 with the first pipe 10A still connected to the first dust collecting section 50A and the second pipe 10B still connected to the second dust collecting section 50B.

[0037] Next, the effects of the first embodiment will be described. (1-1) The first dust collecting section 50A and the second dust collecting section 50B are provided outside the insertion path of the shoe cotter 46 that passes through the recess 37A of the shoe head 37 and the opening formed in the mounting plate 44 of the brake shoe 2. For this reason, the brake shoe 2 can be detached from the shoe head 37 while the first piping 10A remains connected to the first dust collecting section 50A and the second piping 10B remains connected to the second dust collecting section 50B.

[0038] (1-2) By using the L-shaped shoe cotter 46, the degree of freedom in arranging the first dust collecting portion 50A and the second dust collecting portion 50B in the longitudinal direction of the shoe head 37 can be increased. (1-3) In the shoe head 37, the first pipe connection port 54A and the second pipe connection port 54B are formed outside the insertion path of the shoe cotter 46 that passes through the recess 37A of the shoe head 37 and the opening formed in the mounting plate 44 of the brake shoe 2. For this reason, the brake shoe 2 can be detached from the shoe head 37 while the first pipe 10A remains connected to the first pipe connection port 54A and the second pipe 10B remains connected to the second pipe connection port 54B.

[0039] Second embodiment A second embodiment of the brake shoe mounting structure for a unit brake device will be described below with reference to Figures 5 to 8. This embodiment differs from the first embodiment in that the dust collection unit is not provided in the brake shoe 2 but in the shoe head 37. The following description will focus on the differences from the first embodiment.

[0040] (Bracelet mounting structure) 6 and 7, the brake shoe 2 is attached to the shoe head 37 by a shoe cotter 48. The shoe cotter 48 is a plate member curved along the base plate 43, and has a rolled upper end. The shoe cotter 48 is inserted into the recess 37A of the shoe head 37 and an opening formed in the mounting plate 44.

[0041] (Dust collector) As shown in Figs. 5 to 8, the dust collecting section is provided on the shoe head 37. The dust collecting section includes a first dust collecting section 60A and a second dust collecting section 60B. The first dust collecting section 60A and the second dust collecting section 60B are disposed on the shoe cotter. 48 The first dust collecting section 60A is provided outside the insertion path of the shoe head 37. The first dust collecting section 60A is box-shaped with an opening and is provided near the upper part of the shoe head 37. The first dust collecting section 60A has a first suction port 61A for sucking wear powder and a first pipe 10A for connecting the first suction port 61A and a negative pressure source. The opening of the first dust collecting section 60A corresponds to the first suction port 61A. The first suction port 61A is provided on the opposite side of the flange 3B in the width direction of the tread 3A of the wheel 3. The first pipe 10A is connected to the first suction port 61A on the opposite side of the flange 3B. The shoe head 37 has a first support section 62A for supporting the first pipe 10A. The first support section 62A is provided outside the insertion path of the shoe cotter 48. The first dust collecting section 60A is located outside the part where the stop plate 45 is located in the width direction of the shoe head 37. For this reason, the first support portion 62A is provided at a position different from the insertion path of the shoe cotter 48.

[0042] The second dust collecting section 60B is a box-shaped section having an opening, and is provided near the bottom of the shoe head 37. The second dust collecting section 60B has a second suction port 61B for sucking in wear powder, and a second pipe 10B for connecting the second suction port 61B to a negative pressure source. The opening of the second dust collecting section 60B corresponds to the second suction port 61B. The second suction port 61B is provided on the opposite side of the flange 3B in the width direction of the tread surface 3A of the wheel 3. The second pipe 10B is connected to the second suction port 61B on the opposite side of the flange 3B. The shoe head 37 has a second support section 62B for supporting the second pipe 10B. The second support section 62B is provided outside the insertion path of the shoe cotter 48. The second dust collecting section 60B is located outside the portion where the stop plate 45 is located in the width direction of the shoe head 37. For this reason, the second support portion 62B is provided at a position different from the insertion path of the shoe cotter 48.

[0043] (action) Next, the operation of the dust collecting device configured as above will be described with reference to FIGS.

[0044] When the negative pressure source is operated, the first dust collecting unit 60A and the second dust collecting unit 60B suck in the wear powder. The wear powder located near the first suction port 61A and the second suction port 61B is sucked in. The wear powder sucked into the first suction port 61A passes through the first piping 10A and is collected. The wear powder sucked into the second suction port 61B passes through the second piping 10B and is collected. In addition, the wear powder that bounces off the flange 3B of the wheel 3 and scatters can be efficiently sucked in.

[0045] The first dust collecting portion 60A and the second dust collecting portion 60B are not positioned in the insertion path of the shoe cotter 48 and the movement path of the locking portion 47, and neither the first support portion 62A nor the second support portion 62B are positioned in the insertion path of the shoe cotter 48 and the movement path of the locking portion 47. Therefore, when replacing the brake shoe 2, the brake shoe 2 can be removed from the shoe head 37 with the first piping 10A still connected to the first dust collecting portion 60A and the second piping 10B still connected to the second dust collecting portion 60B.

[0046] Next, the effects of the second embodiment will be described. (2-1) First dust collection section 60A and the second dust collection section 60B is provided outside the insertion path of the shoe cotter 48. For this reason, the brake shoe 2 can be attached and detached from the shoe head 37 while the first piping 10A remains connected to the first dust collecting section 60A and the second piping 10B remains connected to the second dust collecting section 60B.

[0047] (2-2) The first pipe 10A and the second pipe 10B are supported outside the insertion path of the shoe cotter 48. For this reason, the brake shoe 2 can be detached from the shoe head 37 while the first pipe 10A and the second pipe 10B remain connected to the shoe head 37.

[0048] (2-3) The first suction port 61A and the second suction port 61B are provided on the side opposite to the side on which the flange 3B is located in the width direction of the tread 3A of the wheel 3. Therefore, wear powder that hits the flange 3B of the wheel 3 and bounces off and scatters can be efficiently sucked in.

[0049] (2-4) The first pipe 10A and the second pipe 10B are connected to the first suction port 61A and the second suction port 61B on the side opposite to the side where the flange 3B of the wheel 3 is located. Therefore, the first pipe 10A and the second pipe 10B can be easily connected to the first suction port 61A and the second suction port 61B without being obstructed by the flange 3B of the wheel 3.

[0050] Third embodiment Hereinafter, a third embodiment of the brake shoe mounting structure for a unit brake device will be described with reference to Fig. 9 to Fig. 13. The dust collection section of this embodiment differs from the second embodiment in that the opening is switched depending on the running direction. The following description will focus on the differences from the second embodiment.

[0051] (Bracelet mounting structure) 10, the brake shoe 2 is attached to the shoe head 37 by a shoe cotter 48. The shoe cotter 48 is a plate member curved along the base plate 43, and has a rolled upper end. The shoe cotter 48 is inserted into the recess 37A of the shoe head 37 and an opening formed in the mounting plate 44.

[0052] (Dust collector) As shown in Figs. 9 to 11, the dust collecting section is provided in the shoe head 37. The dust collecting section includes a first dust collecting section 70A and a second dust collecting section 70B. The first dust collecting section 70A and the second dust collecting section 70B are provided outside the insertion path of the shoe cotter 48. The first dust collecting section 70A is box-shaped with openings on the front side and the back side, and is provided near the upper part of the shoe head 37. The first dust collecting section 70A has a first front side opening 71A and a first back side opening 72A that open in both directions of the running direction of the railroad car, and a first pipe 10A that connects the first front side opening 71A and the first back side opening 72A to a negative pressure source. The first front side opening 71A corresponds to the first opening, and the first back side opening 72A corresponds to the second opening. The first front opening 71A and the first rear opening 72A are provided on the side opposite to the side where the flange 3B is located in the width direction of the tread 3A of the wheel 3. The shoe head 37 has a first support portion 74A that supports the first piping 10A. The first support portion 74A is provided outside the insertion path of the shoe cotter 48. The first dust collection portion 70A is located outside the portion where the retaining plate 45 is located in the width direction of the shoe head 37. For this reason, the first support portion 74A is provided at a position different from the insertion path of the shoe cotter 48.

[0053] The second dust collecting section 70B is box-shaped with openings on the front side and the back side, and is provided near the bottom of the shoe head 37. The second dust collecting section 70B has a second front side opening 71B and a second back side opening 72B that open in each of the two directions of the running direction of the railcar, and a second pipe 10B that connects the second front side opening 71B and the second back side opening 72B to a negative pressure source. The second front side opening 71B corresponds to the first opening, and the second back side opening 72B corresponds to the second opening. The second front side opening 71B and the second back side opening 72B are provided on the opposite side to the side where the flange 3B is located in the width direction of the tread 3A of the wheel 3. The shoe head 37 has a second support part 74B that supports the second pipe 10B. The second support part 74B is provided outside the insertion path of the shoe cotter 48. The second dust collecting portion 70B is located outside the portion where the retaining plate 45 is located in the width direction of the shoe head 37. Second support part 74B is provided at a position different from the insertion path of the shoe cotter 48.

[0054] As shown in Figs. 12 and 13, the first dust collecting section 70A has a first valve 73A that opens the front opening of the first front opening 71A and the first rear opening 72A and closes the rear opening depending on the running direction. The first valve 73A functions as a switching section that switches its position when it receives running wind. As shown in Fig. 12, when the railroad car runs upward in the figure and receives running wind from the upper side in the figure, the first valve 73A is pushed by the air that has entered from the first rear opening 72A and closes the first front opening 71A. As shown in Fig. 13, when the railroad car runs downward in the figure and receives running wind from the lower side in the figure, the first valve 73A is pushed by the air that has entered from the first front opening 71A and closes the first rear opening 72A.

[0055] The second dust collecting section 70B has a second valve 73B that opens the front opening of the second front opening 71B and the second rear opening 72B and closes the rear opening depending on the running direction. The second valve 73B functions as a switching section that switches its position when it receives running wind. As shown in FIG. 12, when the railroad car runs upward in the figure and receives running wind from the upper side in the figure, the second valve 73B is pushed by the air that has entered from the second rear opening 72B and closes the second front opening 71B. As shown in FIG. 13, when the railroad car runs downward in the figure and receives running wind from the lower side in the figure, the second valve 73B is pushed by the air that has entered from the second front opening 71B and closes the second rear opening 72B.

[0056] (action) Next, the operation of the dust collecting device configured as above will be described with reference to FIGS.

[0057] As shown in FIG. 12, when the vehicle receives wind from the upper side in the figure, the first valve 73A (second valve 73B) closes the first front opening 71A (second front opening 71B) and opens the first rear opening 72A (second rear opening 72B). In this state, when the negative pressure source is operated, the first dust collecting unit 70A and the second dust collecting unit 70B suck in wear powder from the first rear opening 72A and the second rear opening 72B. The wear powder is blown in the opposite direction to the traveling direction by the vehicle wind. Therefore, the first dust collecting unit 70A and the second dust collecting unit 70B suck in wear powder generated in the unit brake device 1 located forward of the unit brake device 1 on which the first dust collecting unit 70A and the second dust collecting unit 70B are provided. Then, the wear powder sucked in from the first rear opening 72A passes through the first piping 10A and is collected. The wear powder sucked in through the second rear side opening 72B passes through the second piping 10B and is collected.

[0058] As shown in FIG. 13, when the vehicle receives wind from the lower side in the figure, the first valve 73A (second valve 73B) closes the first rear side opening 72A (second rear side opening 72B) and opens the first front side opening 71A (second front side opening 71B). In this state, when the negative pressure source is operated, the first dust collecting unit 70A and the second dust collecting unit 70B suck in wear powder from the first front side opening 71A and the second front side opening 71B. The wear powder is blown in the opposite direction to the traveling direction by the vehicle wind. Therefore, the first dust collecting unit 70A and the second dust collecting unit 70B suck in wear powder generated in the unit brake device 1 in which the first dust collecting unit 70A and the second dust collecting unit 70B are provided. Then, the wear powder sucked in from the first front side opening 71A passes through the first pipe 10A and is collected. The wear powder sucked in from the second front side opening 71B passes through the second pipe 10B and is collected. In addition, wear powder that hits the flange 3B of the wheel 3 and bounces off, scattering, can be efficiently sucked in.

[0059] The first dust collecting portion 70A and the second dust collecting portion 70B are not positioned in the insertion path of the shoe cotter 48, and neither the first support portion 74A nor the second support portion 74B are positioned in the insertion path of the shoe cotter 48. Therefore, when replacing the brake shoe 2, the brake shoe 2 can be removed from the shoe head 37 with the first piping 10A still connected to the first dust collecting portion 70A and the second piping 10B still connected to the second dust collecting portion 70B.

[0060] Next, the effects of the third embodiment will be described. (3-1) The first dust collecting section 70A and the second dust collecting section 70B are provided outside the insertion path of the shoe cotter 48. For this reason, the brake shoe 2 can be detached from the shoe head 37 while the first piping 10A remains connected to the first dust collecting section 70A and while the second piping 10B remains connected to the second dust collecting section 70B.

[0061] (3-2) The first pipe 10A and the second pipe 10B are supported outside the insertion path of the shoe cotter 48. For this reason, the brake shoe 2 can be attached and detached from the shoe head 37 while the first pipe 10A and the second pipe 10B are connected to the shoe head 37.

[0062] (3-3) The first front opening 71A and the first rear opening 72A and the second front opening 71B and the second rear opening 72B are provided on the side opposite to the side on which the flange 3B is located in the width direction of the tread 3A of the wheel 3. Therefore, wear powder that hits the flange 3B of the wheel 3 and bounces off and scatters can be efficiently sucked in.

[0063] (3-4) The first valve 73A and the second valve 73B close the rear opening depending on the traveling direction. Therefore, even if the wear powder is moved by the traveling wind, the opening can be switched according to the traveling wind to suppress a decrease in the dust collection amount.

[0064] (3-5) The first pipe 10A and the second pipe 10B are connected to the first dust collecting unit 70A and the second dust collecting unit 70B on the side opposite to the side where the flange 3B of the wheel 3 is located. Therefore, the first pipe 10A and the second pipe 10B can be easily connected to the first dust collecting unit 70A and the second dust collecting unit 70B without being obstructed by the flange 3B of the wheel 3.

[0065] (Fourth embodiment) Hereinafter, a fourth embodiment of the brake shoe mounting structure for a unit brake device will be described with reference to Fig. 14 to Fig. 17. The dust collecting portion of this embodiment is different from the second embodiment in that it is provided on the upper and lower parts of the shoe head. The following description will focus on the differences from the second embodiment.

[0066] (Bracelet mounting structure) The brake shoe 2 is attached to the shoe head 37 by a shoe cotter 46. The shoe cotter 46 is inserted into the recess 37A of the shoe head 37 and an opening formed in the mounting plate 44. The shoe cotter 46 is L-shaped. The shoe head 37 has a locking portion 47. The locking portion 47 is movable between a restricting position that restricts the displacement of the shoe cotter 46 inserted into the recess 37A of the shoe head 37 and the opening formed in the mounting plate 44, and a non-restricting position that does not restrict the displacement of the shoe cotter 46.

[0067] (Dust collector) As shown in Figs. 14 to 16, the dust collecting section is provided on the shoe head 37. The dust collecting section includes a first dust collecting section 80A and a second dust collecting section 80B. The first dust collecting section 80A and the second dust collecting section 80B are provided outside the insertion path of the shoe cotter 46. The first dust collecting section 80A is box-shaped with an opening, and is provided on the upper part of the shoe head 37. The first dust collecting section 80A has a first suction port 81A for sucking wear powder, and two first pipes 10A for connecting the first suction port 81A and a negative pressure source. The opening of the first dust collecting section 80A corresponds to the first suction port 81A. The first dust collecting section 80A is provided integrally with the shoe head 37. The first pipes 10A are connected to both side surfaces of the first dust collecting section 80A. The shoe head 37 has two first support sections 82A for supporting the first pipes 10A. The first support portion 82A is provided outside the insertion path of the shoe cotter 46. The width of the first suction port 81A of the first dust collecting portion 80A is longer than the width of the brake shoe 2. The first suction port 81A covers the outside of the longitudinal end of the brake shoe 2. Therefore, wear powder located at the upper part of the brake shoe 2 can be efficiently sucked in.

[0068] The second dust collecting section 80B is a box-shaped body having an opening. under The second dust collecting section 80B has a second suction port 81B for sucking in wear powder, and two second pipes 10B connecting the second suction port 81B to a negative pressure source. The opening of the second dust collecting section 80B corresponds to the second suction port 81B. The second dust collecting section 80B is integrally provided with the shoe head 37. The second pipes 10B are connected to both side surfaces of the second dust collecting section 80B. The shoe head 37 has two second support sections 82B for supporting the second pipes 10B. The second support sections 82B are provided outside the insertion path of the shoe cotter 46. The width of the second suction port 81B of the second dust collecting section 80B is longer than the width of the brake shoe 2. The second suction port 81B covers the outside of the longitudinal ends of the brake shoe 2. For this reason, under This allows for efficient suction of wear debris located in the area.

[0069] (action) Next, the operation of the dust collecting device configured as above will be described with reference to FIG. When the negative pressure source is operated, the first dust collecting unit 80A and the second dust collecting unit 80B suck in the wear powder. The wear powder located near the first suction port 81A and the second suction port 81B is sucked in. The wear powder sucked into the first suction port 81A passes through the first piping 10A and is collected. The wear powder sucked into the second suction port 81B passes through the second piping 10B and is collected.

[0070] The first dust collecting portion 80A and the second dust collecting portion 80B are not positioned in the insertion path of the shoe cotter 46 and the movement path of the locking portion 47, and neither the first support portion 82A nor the second support portion 82B are positioned in the insertion path of the shoe cotter 46 and the movement path of the locking portion 47. Therefore, when replacing the brake shoe 2, the brake shoe 2 can be removed from the shoe head 37 with the first piping 10A still connected to the first dust collecting portion 80A and the second piping 10B still connected to the second dust collecting portion 80B.

[0071] Next, the effects of the fourth embodiment will be described. (4-1) The first dust collecting section 80A and the second dust collecting section 80B are provided outside the insertion path of the shoe cotter 46. For this reason, the brake shoe 2 can be detached from the shoe head 37 while the first piping 10A remains connected to the first dust collecting section 80A and while the second piping 10B remains connected to the second dust collecting section 80B.

[0072] (4-2) The first pipe 10A and the second pipe 10B are supported outside the insertion path of the shoe cotter 46. For this reason, the brake shoe 2 can be attached and detached from the shoe head 37 while the first pipe 10A and the second pipe 10B are connected to the shoe head 37.

[0073] (4-3) The first dust collecting section 80A and the second dust collecting section 80B are provided respectively on the upper and lower parts of the shoe head 37. Therefore, wear powder present in large amounts downstream in the rotation direction of the wheel 3 can be efficiently sucked in.

[0074] (4-4) The width of the first suction port 81A and the second suction port 81B is greater than the width of the brake shoe 2. For this reason, wear powder scattered to the outside of the brake shoe 2 can also be sucked in, so that wear powder can be sucked in more efficiently than when the width of the suction port is less than the width of the brake shoe 2.

[0075] (4-5) The first suction port 81A and the second suction port 81B cover the outside of the longitudinal ends of the brake shoe 2. For this reason, wear powder scattered to the outside of the brake shoe 2 can also be sucked in, and wear powder can be sucked in more efficiently than in a case where the suction ports are not located outside the longitudinal ends of the brake shoe 2.

[0076] Fifth embodiment Hereinafter, a fifth embodiment of the brake shoe mounting structure for a unit brake device will be described with reference to Fig. 18 to Fig. 21. The dust collecting section of this embodiment is different from the first embodiment in that it is provided in the metal block of the composite brake shoe. The following description will focus on the differences from the first embodiment.

[0077] (Bracelet mounting structure) As shown in FIG. 18, the friction material 41 of the brake shoe 2 is composed of a composite material 41A mainly composed of synthetic resin, and a metal block 41B that penetrates the composite material 41A and is exposed on the friction surface with the wheel 3. The metal block 41B is provided near the upper part and the lower part of the friction material 41. The brake shoe 2 is attached to the shoe head 37 by a shoe cotter 46. The shoe cotter 46 is inserted into the recess 37A of the shoe head 37 and an opening formed in the mounting plate 44. The shoe cotter 46 is L-shaped. The shoe head 37 has a locking portion 47. The locking portion 47 is movable between a restricting position that restricts the displacement of the shoe cotter 46 inserted into the recess 37A of the shoe head 37 and the opening formed in the mounting plate 44, and a non-restricting position that does not restrict the displacement of the shoe cotter 46.

[0078] (Dust collector) As shown in FIG. 18 and FIG. 19, the dust collecting section is provided in the brake shoe 2 and the shoe head 37. The dust collecting section includes a first dust collecting section 90A and a second dust collecting section 90B. The first dust collecting section 90A and the second dust collecting section 90B are provided outside the insertion path of the shoe cotter 46 and outside the movement path of the locking section 47. A first suction port 91A for sucking wear powder is formed in the metal block 41B near the upper part of the brake shoe 2. The first dust collecting section 90A is provided near the upper part of the shoe head 37 and has a first flow path 92A connected to the first suction port 91A. The first flow path 92A penetrates the metal block 41B and is connected to a first through hole 93A formed in the base plate 43. The first flow path 92A is provided with a first piping connection port 94A connected to a negative pressure source. The first piping connection port 94A is formed outside the insertion path of the shoe cotter 46 in the shoe head 37 and outside the movement path of the lock portion 47.

[0079] A second suction port 91B for sucking in wear powder is formed in the metal block 41B near the bottom of the brake shoe 2. The second dust collector 90B is provided near the bottom of the shoe head 37 and has a second flow passage 92B that is connected to the second suction port 91B. The second flow passage 92B passes through the metal block 41B and is connected to a second through hole 93B formed in the base plate 43. A second piping connection port 94B that is connected to a negative pressure source is provided in the second flow passage 92B. The second piping connection port 94B is formed outside the insertion path of the shoe cotter 46 in the shoe head 37 and outside the movement path of the locking portion 47.

[0080] As shown in Fig. 19, the first suction port 91A and the second suction port 91B are about the same size as the width of the brake shoe 2. As shown in Fig. 20, the first through hole 93A and the second through hole 93B of the base metal 42 are significantly smaller than the first suction port 91A and the second suction port 91B. As shown in Fig. 21, the first flow path 92A and the second flow path 92B formed in the metal block 41B are tapered so as to narrow from the first suction port 91A and the second suction port 91B toward the first through hole 93A and the second through hole 93B.

[0081] (action) Next, the operation of the dust collecting device configured as above will be described with reference to FIG. When the negative pressure source is operated, the first dust collecting unit 90A and the second dust collecting unit 90B suck in wear powder. Wear powder located near the first suction port 91A and the second suction port 91B is sucked in. The wear powder sucked into the first suction port 91A passes through the first flow path 92A and the first piping 10A and is collected. The wear powder sucked into the second suction port 91B passes through the second flow path 92B and the second piping 10B and is collected.

[0082] The first dust collecting section is disposed in the insertion path of the shoe cotter 46 and the movement path of the locking section 47. 90A and the second dust collection section 90B is not located and the first piping connection port 94A and second piping connection port 94B Therefore, when replacing the brake shoe 2, the first pipe 10A is not located in the first dust collecting section. 90A and the second pipe 10B is connected to the second dust collecting section. 90B The brake shoe 2 can be removed from the shoe head 37 while still connected to the brake shoe 2 .

[0083] Next, the effects of the fifth embodiment will be described. (5-1) The first dust collecting section 90A and the second dust collecting section 90B are provided outside the insertion path of the shoe cotter 46. Therefore, the first piping 10A is 90A and the second pipe 10B is connected to the second dust collecting section. 90B The brake shoe 2 can be detached from the shoe head 37 while still connected to the brake shoe 2 .

[0084] (5-2) By using the L-shaped shoe cotter 46, the degree of freedom in arranging the first dust collecting portion 90A and the second dust collecting portion 90B in the longitudinal direction of the shoe head 37 can be increased. (5-3) The first pipe 10A and the second pipe 10B are supported outside the insertion path of the shoe cotter 46. For this reason, the brake shoe 2 can be attached and detached from the shoe head 37 while the first pipe 10A and the second pipe 10B are connected to the shoe head 37.

[0085] (5-4) The first suction port 91A and the second suction port 91B are formed in the metal block 41B of the brake shoe 2. Therefore, compared to the case where suction ports are formed in the composite material 41A which is more brittle than the metal block 41B of the friction material 41, manufacturing can be facilitated.

[0086] Sixth embodiment Hereinafter, a sixth embodiment of the brake shoe mounting structure for a unit brake device will be described with reference to Fig. 22. The dust collection unit of this embodiment differs from the first embodiment in that it is provided near the end of the brake shoe 2. Below, the differences from the first embodiment will be mainly described.

[0087] (Dust collector) 22, the dust collecting section is provided on the brake shoe 2 and the shoe head 37. The dust collecting section includes a first dust collecting section 50A and a second dust collecting section 50B. The first dust collecting section 50A is provided near the upper part of the brake shoe 2. The second dust collecting section 50B is provided near the lower part of the brake shoe 2.

[0088] The first dust collecting section 50A and the second dust collecting section 50B are provided outside the insertion path of the shoe cotter 46 and outside the movement path of the locking section 47. A first suction port 51A for sucking wear powder is formed near the upper part of the brake shoe 2. The first dust collecting section 50A is provided on the base plate 43 outside the stop plate 45 along the longitudinal direction of the base plate 43 of the base metal 42. The first dust collecting section 50A is provided near the upper part of the shoe head 37 and has a first flow path 52A connected to the first suction port 51A. The first flow path 52A penetrates the friction material 41 and is connected to a first through hole 53A formed outside the stop plate 45 of the base plate 43. The first flow path 52A is provided with a first piping connection port 54A connected to a negative pressure source. The first piping connection port 54A is formed outside the insertion path of the shoe cotter 46 in the shoe head 37 and outside the movement path of the locking section 47.

[0089] A second suction port 51B for sucking wear powder is formed near the lower part of the brake shoe 2. The second dust collecting part 50B is provided on the base plate 43 of the base metal 42, outside the stop plate 45 along the longitudinal direction of the base plate 43. The second dust collecting part 50B is provided near the lower part of the shoe head 37 and has a second flow path 52B connected to the second suction port 51B. The second flow path 52B penetrates the friction material 41 and is connected to a second through hole 53B formed outside the stop plate 45 of the base plate 43. The second flow path 52B is provided with a second piping connection port 54B connected to a negative pressure source. The second piping connection port 54B is formed outside the insertion path of the shoe cotter 46 in the shoe head 37 and outside the movement path of the lock part 47.

[0090] (action) Next, the operation of the dust collecting device configured as above will be described with reference to FIG. When the negative pressure source is operated, the first dust collecting unit 50A and the second dust collecting unit 50B suck in the wear powder. The wear powder located near the first suction port 51A and the second suction port 51B is sucked in. The wear powder sucked into the first suction port 51A passes through the first flow path 52A and the first piping 10A and is collected. The wear powder sucked into the second suction port 51B passes through the second flow path 52B and the second piping 10B and is collected.

[0091] The first dust collecting section 50A and the second dust collecting section 50B are not positioned in the insertion path of the shoe cotter 46 and the movement path of the locking section 47, and neither the first pipe connection port 54A nor the second pipe connection port 54B are positioned in the insertion path of the shoe cotter 46 and the movement path of the locking section 47. Therefore, when replacing the brake shoe 2, the brake shoe 2 can be removed from the shoe head 37 with the first pipe 10A still connected to the first dust collecting section 50A and the second pipe 10B still connected to the second dust collecting section 50B.

[0092] Next, the effects of the sixth embodiment will be described. In addition to the effects (1-1) to (1-3) of the first embodiment, the sixth embodiment has the following effects. (2-1) The first dust collecting section 50A and the second dust collecting section 50B are provided on the base plate 43 on the outer side of the retaining plate 45 along the longitudinal direction of the base plate 43. Therefore, the brake shoe 2 can be detached from the shoe head 37 while the first piping 10A remains connected to the first dust collecting section 50A and while the second piping 10B remains connected to the second dust collecting section 50B.

[0093] Seventh embodiment Hereinafter, a seventh embodiment of the brake shoe mounting structure for a unit brake device will be described with reference to Fig. 23 and Fig. 24. The dust collection unit of this embodiment differs from the first embodiment in that the suction force of the upper suction port and the suction force of the lower suction port are adjusted. The following description will focus on the differences from the first embodiment.

[0094] 23 and 24, the first dust collecting section 50A and the second dust collecting section 50B have an adjustment valve 11, an acquisition section 13A, and a control section 13B. The adjustment valve 11 is connected to a negative pressure source, and is connected to a first pipe 10A and a second pipe 10B. The adjustment valve 11 adjusts the suction force of a first suction port 51A provided at the top of the shoe head 37 and the suction force of a second suction port 51B provided at the bottom.

[0095] The acquisition unit 13A and the control unit 13B are provided in the control device 13. The control device 13 may be configured as one or more processors that execute various processes according to a computer program (software). The control device 13 may be configured as one or more dedicated hardware circuits, such as an application specific integrated circuit (ASIC), that execute at least a part of the various processes, or a circuit including a combination thereof. The processor includes a CPU and memories such as a RAM and a ROM. The memory stores program codes or instructions that are configured to cause the CPU to execute the processes. The memory, i.e., the computer readable medium, includes any available medium that can be accessed by a general-purpose or dedicated computer. The acquisition unit 13A acquires driving information indicating the driving direction of the wheels 3. The control unit 13B controls the regulating valve 11 according to the driving information. The control unit 13B determines the rotation direction of the wheels 3. aboveThe suction force of the suction port on the downstream side is reduced by a predetermined amount, and the rotation direction of the wheel 3 is under The regulating valve 11 is controlled so as to increase the suction force of the suction port on the downstream side by the predetermined amount.

[0096] (action) Next, the operation of the dust collecting device configured as above will be described with reference to FIGS.

[0097] When the negative pressure source is activated, the acquisition unit 13A acquires driving information, and the control unit 13B under The suction force of the inlet on the flow side above The suction force of the first suction port 51A is greater than the suction force of the second suction port 51B on the downstream side. That is, as shown in FIG. 23, when the rotation direction of the wheel 3 is from top to bottom in the figure, the top of the brake shoe 2 is upstream and the bottom is downstream. The control unit 13B reduces the suction force of the first suction port 51A by a predetermined amount and increases the suction force of the second suction port 51B by a predetermined amount. The adjustment valve 11 increases the flow rate of the second piping 10B by a predetermined amount by reducing the flow rate of the first piping 10A by a predetermined amount. As shown in FIG. 24, when the rotation direction of the wheel 3 is from bottom to top in the figure, the top of the brake shoe 2 is downstream and the bottom is upstream. The control unit 13B increases the suction force of the first suction port 51A by a predetermined amount and decreases the suction force of the second suction port 51B by a predetermined amount. The adjustment valve 11 increases the flow rate of the first piping 10A by a predetermined amount by reducing the flow rate of the second piping 10B by a predetermined amount.

[0098] The first dust collecting section 50A and the second dust collecting section 50B suck up the wear powder. The wear powder located near the first suction port 51A and the second suction port 51B is sucked up. The wear powder sucked into the first suction port 51A passes through the first flow path 52A and the first piping 10A and is collected. The wear powder sucked into the second suction port 51B passes through the second flow path 52B and the second piping 10B and is collected.

[0099] Next, the effects of the seventh embodiment will be described. In addition to the effects (1-1) to (1-3) of the first embodiment, the seventh embodiment has the following effects. (7-1) Depending on the rotation direction of the wheel 3, the adjusting valve 11 increases the suction force downstream in the rotation direction of the wheel 3 and correspondingly reduces the suction force upstream in the rotation direction of the wheel 3. Therefore, even if the rotation direction of the wheel 3 changes, wear powder that is present in large amounts downstream in the rotation direction of the wheel 3 can be efficiently sucked in.

[0100] Eighth embodiment Hereinafter, an eighth embodiment of the brake shoe mounting structure for a unit brake device will be described with reference to Fig. 25. The dust collecting section of this embodiment differs from the seventh embodiment in that an adjustment valve is provided in each pipe. Below, the differences from the seventh embodiment will be mainly described.

[0101] As shown in FIG. 25, the first dust collecting section 50A and the second dust collecting section 50B have a first adjusting valve 15A and a second adjusting valve 15B, an acquisition section 13A, and a control section 13B. The first adjusting valve 15A is connected to a negative pressure source and is connected to a first pipe 10A. The first adjusting valve 15A adjusts the suction force of a first suction port 51A provided at an upper part of the shoe head 37. The second adjusting valve 15B is connected to a negative pressure source and is connected to a second pipe 10B. The second adjusting valve 15B adjusts the suction force of a second suction port 51B provided at a lower part of the shoe head 37.

[0102] (action) Next, the operation of the dust collecting device configured as above will be described with reference to FIG. When the negative pressure source is activated, the acquisition unit 13A acquires the driving information, and the control unit 13B makes the suction force of the downstream suction port greater than that of the upstream suction port. That is, the downstream adjustment valve out of the first adjustment valve 15A and the second adjustment valve 15B increases the flow rate by a predetermined amount. The upstream adjustment valve out of the first adjustment valve 15A and the second adjustment valve 15B decreases the flow rate by a predetermined amount.

[0103] Next, the effects of the eighth embodiment will be described. In addition to the effects (1-1) to (1-3) of the first embodiment, the eighth embodiment has the following effects. (8-1) According to the rotation direction of the wheel 3, the first adjusting valve 15A and the second adjusting valve 15B reduce the suction force upstream in the rotation direction of the wheel 3 and increase the suction force downstream in the rotation direction of the wheel 3 accordingly. Therefore, even if the rotation direction of the wheel 3 changes, wear powder that is present in large amounts downstream in the rotation direction of the wheel 3 can be efficiently sucked in.

[0104] Ninth embodiment Hereinafter, a ninth embodiment of the dust collecting device will be described with reference to FIG. A bogie of a railway vehicle is provided with various devices such as wheels and a brake device, so the space available for installing the piping of the dust collecting device is limited.

[0105] As shown in Fig. 26, a bogie 100 having wheels 3 includes side beams 101 extending in the track direction and cross beams 102 perpendicular to the track. A unit brake device 1 for braking each wheel 3 is fixed to each cross beam 102. A brake shoe 2 attached to a shoe head 37 of the unit brake device 1 is pressed against a tread surface 3A of the wheel 3. Therefore, the pressing of the brake shoe 2 generates wear powder.

[0106] A dust collector is provided on the cart 100 to suck up the wear powder. The dust collector includes a first pipe 103, a second pipe 104, a third pipe 105, and a fourth pipe 106, which are connected to a negative pressure source. The first pipe 103 and the second pipe 104 are provided inside the side beam 101 on the right side in the figure. The third pipe 105 and the fourth pipe 106 are provided inside the side beam 101 on the left side in the figure. The first suction of the first pipe 103 Mouth , protruding from the side beam 101 and located near the brake shoe 2 at the upper right in the figure. Mouth , protruding from the side beam 101 and located near the brake shoe 2 at the lower right in the figure. Mouth , protruding from the side beam 101 and located near the brake shoe 2 at the upper left in the figure. Mouth It protrudes from the side beam 101 and is located near the brake shoe 2 at the bottom left of the figure.

[0107] (action) Next, the operation of the dust collecting device configured as above will be described with reference to FIG. When the negative pressure source is operated, the first pipe 103, the second pipe 104, the third pipe 105, and the fourth pipe 106 suck in wear powder. Wear powder located near each suction port is sucked in. The sucked in wear powder then passes through the first pipe 103, the second pipe 104, the third pipe 105, and the fourth pipe 106, respectively, and is collected.

[0108] Next, the effects of the ninth embodiment will be described. (9-1) The first pipe 103, the second pipe 104, the third pipe 105, and the fourth pipe 106 connected to the negative pressure source are provided inside the side beam 101 of the bogie 100. This makes it possible to reduce the space used by the pipes.

[0109] (Other embodiments) The above-described embodiments may be modified as follows: The above-described embodiments and the following modifications may be combined with each other to the extent that no technical contradiction occurs.

[0110] In the third embodiment, the switching unit includes the first valve 73A and the second valve 73B that are switched by the running wind. However, the control unit may acquire running information of the railroad vehicle and switch between opening and closing of the opening in response to the running information.

[0111] In the fourth embodiment, two first pipes 10A are provided, but the number of first pipes 10A may be one. Similarly, two second pipes 10B are provided, but the number of second pipes 10B may be one.

[0112] In the above fourth embodiment, the width of the first suction port 81A of the first dust collecting portion 80A and the width of the second suction port 81B of the second dust collecting portion 80B are made longer than the width of the brake shoe 2. However, the width of the first suction port 81A of the first dust collecting portion 80A and the width of the second suction port 81B of the second dust collecting portion 80B may be the same as the width of the brake shoe 2 or shorter than the width of the brake shoe 2.

[0113] In each of the above embodiments, the suction port of the dust collecting unit may be open toward the outside of the railcar in which the dust collecting unit is provided. With this configuration, wear powder flying off the track can be collected regardless of which direction the railcar is traveling on the track.

[0114] In each of the above embodiments, if a product is made up of multiple objects, the multiple objects may be integrated, and conversely, if a product is made up of a single object, it may be divided into multiple objects. Regardless of whether the objects are integrated or not, it is sufficient that the product is configured to achieve the object of the invention.

[0115] In each of the above embodiments, where multiple functions are provided in a distributed manner, some or all of the multiple functions may be provided in an integrated manner, and conversely, where multiple functions are provided in an integrated manner, some or all of the multiple functions may be provided in a distributed manner. Regardless of whether the functions are integrated or distributed, it is sufficient that the configuration is such that the object of the invention can be achieved.

[0116] Next, the technical ideas that can be understood from the above-described embodiments and modifications will be described together with their effects. (A) A dust collection device provided inside a beam of a bogie having wheels, having a piping connected to a negative pressure source, the suction port of the piping protruding from the beam and positioned near a brake shoe driven by a brake cylinder.

[0117] According to the above-mentioned configuration, the piping connected to the negative pressure source is provided inside the beam of the cart, which makes it possible to reduce the space required for the piping. [Explanation of symbols]

[0118] 1...Unit brake device 2…Bracelets 3...wheels 3A…Tread 3B…Flange 10A…First pipe 10B…Second piping 11...Adjusting valve 13...Control device 13A…Acquisition Department 13B…Control section 15A…First adjustment valve 15B…Second adjusting valve 20...Air brake cylinder 20A…Supply port 21...Cylinder 21A…Operating chamber 22…Release spring 23…Piston 23A…Connecting pin 30...Transmission drive section 31...Main body 31A…Holding part 31B…Connecting pin 32…Brake lever 32A…Spherical through hole 33…Spindle 34...Spherical bearing 35…Sheath 36...Push stick 36A…Connecting pin 37…Shoehead 37A…Recess 38…Hanger 39…Manual adjustment nut 41...Friction material 41A…Composite material 41B…Metal block 42...base money 43…Base plate 44…Mounting plate 45…Stop plate 46...Shukotta 47…Rock Club 47A…Rotary shaft 48...Shukotta 50A…First dust collection section 50B…Second dust collection section 51A…1st suction port 51B…Second suction port 52A…First flow path 52B…Second flow path 53A…1st through hole 53B…Second through hole 54A…First pipe connection port 54B…Second piping connection port 60A…First dust collection section 60B…Second dust collection section 61A…1st suction port 61B…Second suction port 62A…First support part 62B…Second support part 70A…First dust collection section 70B…Second dust collection section 71A…First front opening 71B…Second front opening 72A…1st back side opening 72B…Second back side opening 73A…First valve (switching section) 73B…Second valve (switching section) 74A…First support part 74B…Second support part 80A…First dust collection section 80B…Second dust collection section 81A…1st suction port 81B…Second suction port 82A…1st support part 82B…Second support part 90A…First dust collection section 90B…Second dust collection section 91A…1st suction port 91B…Second suction port 92A…First flow path 92B…Second flow path 93A…1st through hole 93B…Second through hole 94A…First pipe connection port 94B…Second piping connection port 100…Trolley 101...Side beam 102…Horizontal beam 103…First pipe 103A…1st suction port 104…Second piping 104A…Second suction port 105…Third pipe 105A…Third suction port 106…4th pipe 106A…4th suction port

Claims

1. A shoe head having a recess into which the protrusion of the brake shoe fits; A shoe cotter is inserted into an opening formed in the recess and the protrusion to attach the brake shoe to the shoe head. A dust collection section that collects wear powder generated when the brake shoe is pressed against the wheel tread, The dust collecting section is provided outside the insertion path of the shoe cotter. Brake shoe mounting structure for unit brake device.

2. The shoe cotter is an L-shaped shoe cotter, The shoe cotter further includes a locking portion that is movable between a restricting position that restricts the displacement of the shoe cotter inserted into the openings formed in the recess and the protruding portion, and a non-restricting position that does not restrict the displacement of the shoe cotter. The dust collecting section is provided outside the insertion path of the shoe cotter and outside the movement path of the locking section.

2. A brake shoe mounting structure for a unit brake device according to claim 1.

3. The brake shoe is formed with a suction port for sucking the wear powder, The dust collection unit is provided in the shoe head and has a flow path connected to the suction port, A piping connection port of the flow path connected to a negative pressure source is formed outside the insertion path of the shoe cotter in the shoe head.

3. A brake shoe mounting structure for a unit brake device according to claim 1 or 2.

4. The dust collection unit has a suction port that sucks the wear powder and a pipe that connects the suction port to a negative pressure source, The shoe head has a support portion that supports the piping, The support portion is provided outside the insertion path of the shoe cotter.

3. A brake shoe mounting structure for a unit brake device according to claim 1 or 2.

5. The suction port of the dust collecting unit is provided on the opposite side to the side on which the flange is located in the width direction of the wheel tread.

5. A brake shoe mounting structure for a unit brake device according to claim 4.

6. The suction port of the dust collecting portion opens toward the outside of the vehicle when the brake shoe mounting structure is provided on the vehicle having the wheel.

5. A brake shoe mounting structure for a unit brake device according to claim 4.

7. The suction port of the dust collection unit has a first opening and a second opening that open in each of both directions in a traveling direction of a vehicle having the wheels, The dust collecting section has a switching section that opens a front opening of the first opening and a rear opening of the second opening according to the traveling direction.

5. A brake shoe mounting structure for a unit brake device according to claim 4.

8. The suction port of the dust collecting unit is provided in at least one of the upper and lower parts of the shoe head.

5. A brake shoe mounting structure for a unit brake device according to claim 4.

9. The suction ports are provided on both the upper and lower parts of the shoe head, The dust collection unit is an adjusting valve for adjusting the suction force of each of the suction ports at the upper and lower parts of the shoe head; an acquisition unit that acquires driving information indicating a driving direction of the wheels; a control unit that controls the adjustment valve so as to reduce a suction force of the suction port on the upstream side in the rotation direction of the wheel by a predetermined amount and to increase a suction force of the suction port on the downstream side in the rotation direction of the wheel by the predetermined amount in response to the driving information. The brake shoe mounting structure of a unit brake device according to claim 8.

10. The width of the suction port is greater than the width of the brake shoe. The brake shoe mounting structure of a unit brake device according to claim 8.

11. The suction port covers the outside of the longitudinal end of the brake shoe. The brake shoe mounting structure of a unit brake device according to claim 9.

12. The piping of the dust collecting unit is connected to the suction port on the side opposite to the side where the flange in the width direction of the wheel tread is located.

5. A brake shoe mounting structure for a unit brake device according to claim 4.

13. a curved base plate having a protrusion that fits into a recess of the shoe head and a stop plate that engages with the shoe head to position the shoe head; a friction material provided on the opposite side of the base plate to the surface on which the protrusion and the stop plate are provided, the friction material being pressed against the wheel; A dust collecting section that is connected to a pipe and that collects wear powder generated when the friction material is pressed against the wheel is provided on the base plate outside the stop plate along the longitudinal direction of the base plate. Brake shoe of unit brake device.

14. A curved base plate having a protrusion on one surface thereof that fits into a recess of the shoe head; a friction material provided on the opposite side of a surface on which a stop plate for engaging with the protrusion of the base plate and the shoe head to perform positioning is provided, the friction material being pressed against the wheel; The friction material is composed of a composite material mainly composed of a synthetic resin and a metal block that penetrates the composite material and is exposed on the friction surface with the wheel, A suction port for suctioning wear powder of the friction material is formed in the metal block. Brake shoe of unit brake device.

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