Abrasion powder suction system and abrasion powder suction device

Abstract

To provide an abrasion powder suction system and an abrasion powder suction device that prevent deterioration of dust collection efficiency even when a contact position between a brake shoe and a wheel is displaced.SOLUTION: An abrasion powder suction system includes: a clearance regulator 40 provided in a unit brake device 1 to regulate a clearance between a brake shoe 2 of the unit brake device 1 and a wheel 3 against which the brake shoe 2 is pressed; a manual adjustment nut 39 that manually adjusts a clearance between the brake shoe 2 and the wheel 3 and rotates in cooperation with the clearance regulator 40; a conversion section 18 that converts rotating motion of the manual adjustment nut 39 into linear motion; and a suction section 11 that sucks abrasion powder generated by pressing the brake shoe 2 against the wheel 3. The suction section 11 moves in a direction in which the brake shoe 2 is pressed against the wheel 3 through the linear motion.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a wear powder suction system and a wear powder suction device.

Background Art

[0002] In the caliper brake device described in Patent Document 1, grooves are provided in the brake pads, and a through hole communicating with the grooves is provided at the center of the shoe holder that supports the brake pads. The through hole is connected to a negative pressure source via a pipe connected to the back surface of the shoe holder. Then, the wear powder generated by pressing the brake pads against the disc is sucked through the through hole and the pipe.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in a unit brake device, the vehicle is braked by pressing a brake shoe against the tread of a wheel. When the brake shoe and the wheel wear, the contact position between the brake shoe and the wheel is displaced. Therefore, if it is installed so as to suck wear powder at the initial position, the dust collection efficiency decreases as the wear progresses.

Means for Solving the Problems

[0005] The wear powder suction system for solving the above problems is provided in a unit brake device, and includes a gap adjuster for adjusting the gap between the brake wheel of the unit brake device and the wheel against which the brake wheel is pressed, a manual adjustment part that rotates in conjunction with the gap adjuster for manually adjusting the gap between the brake wheel and the wheel, a conversion part for converting the rotational motion of the manual adjustment part into a linear motion, and a suction part for sucking the wear powder generated when the brake wheel is pressed against the wheel. The suction part moves in the direction in which the brake wheel is pressed against the wheel by the linear motion.

[0006] According to the above configuration, the suction part for sucking the wear powder is moved in the direction in which the brake wheel is pressed against the wheel by utilizing the rotation of the manual adjustment part that rotates in conjunction with the gap adjuster. Since the gap adjuster rotates when the contact position between the brake wheel and the wheel is displaced due to wear, the suction part can also be moved in response to this rotation. Therefore, even if the contact position between the brake wheel and the wheel is displaced, it is possible to suck without reducing the dust collection efficiency.

[0007] Regarding the above wear powder suction system, it is preferable that the suction part is provided in a non-contact state with the brake wheel, and a suction port is provided at a position facing the contact portion between the brake wheel and the wheel.

[0008] Regarding the above wear powder suction system, it includes a first gear fixed coaxially with the rotation axis of the manual adjustment part, and a second gear meshing with the first gear to transmit the rotational motion to the conversion part. It is preferable that when the first gear rotates together with the manual adjustment part, the second gear rotates, thereby causing the conversion part to rotate.

[0009] Regarding the above wear powder suction system, it is preferable to include an endless belt spanned between the manual adjustment part and the conversion part, and when the manual adjustment part rotates, the conversion part rotates via the endless belt.

[0010] Regarding the above-mentioned wear powder suction system, a first pinion fixed coaxially with the rotation axis of the manual adjustment part, a rack that meshes with the first pinion and converts the rotational motion of the first pinion into a linear motion, and an outer periphery of the conversion part It is provided with a second pinion that meshes with the rack and converts the linear motion of the rack into a rotational motion. When the first pinion rotates together with the manual adjustment part, it is preferable that the conversion part rotates when the rack moves linearly.

[0011] Regarding the above-mentioned wear powder suction system, the suction part is a cylindrical member that penetrates the conversion part and has a male thread formed on its outer peripheral surface. A female thread that meshes with the male thread is formed on the inner surface of the conversion part. When the conversion part rotates, it is preferable that the suction part moves via the male thread and the female thread.

[0012] The wear powder suction device that solves the above problems is provided in the unit brake device and is connected to a manual adjustment part that rotates in conjunction with a gap adjuster that adjusts the gap between the brake wheel of the unit brake device and the wheel against which the brake wheel is pressed. A conversion part that converts the rotational motion of the manual adjustment part into a linear motion, and a suction part that sucks the wear powder generated when the brake wheel is pressed against the wheel. The suction part moves in the direction in which the brake wheel is pressed against the wheel by the linear motion.

[0013] According to the above configuration, the suction part that sucks the wear powder is moved in the direction in which the brake wheel is pressed against the wheel by using the rotation of the manual adjustment part that rotates in conjunction with the gap adjuster. Since the gap adjuster rotates when the contact position between the brake wheel and the wheel is displaced due to wear, the suction part can also be moved in response to this rotation. Therefore, even if the contact position between the brake wheel and the wheel is displaced, it is possible to suck without reducing the dust collection efficiency.

Effect of the Invention

[0014] According to the present invention, even if the contact position between the brake wheel and the wheel is displaced, it is possible to suck without reducing the dust collection efficiency.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Mode for Carrying Out the Invention

[0016] (First Embodiment) Hereinafter, with reference to FIGS. 1 to 3, a first embodiment of a wear powder suction system will be described. The wear powder suction system is provided in a unit brake device and includes a gap adjuster of the unit brake device and a wear powder suction device. The wear powder suction device sucks wear powder generated when a braking wheel is pressed against the tread of a wheel. The tread brake device includes the wheels of a railway vehicle and the unit brake device.

[0017] (Unit Brake Device 1) As shown in FIG. 1, the unit brake device 1 presses a braking wheel 2 against the tread 3A of a wheel 3 of a railway vehicle. 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 main body 31.

[0018] (Air Brake Cylinder 20) The air brake cylinder 20 includes a bottomed cylindrical cylinder 21. The cylinder 21 is provided at the upper part on the left side in FIG. 1 which is the front side of the main body 31. The air brake cylinder 20 includes a release spring 22 and a piston 23 biased by the release spring 22. A piston rod 23A protruding into the main body 31 is provided on the tip side of the piston 23. The piston rod 23A is rotatably connected to the brake lever 32 via a connecting pin 24. The brake lever 32 rotates about a support shaft 33 fixed to the main body 31 as the center of rotation.

[0019] A supply port 20A for supplying compressed air into the cylinder 21 is provided at the bottom of the cylinder 21 (left side in FIG. 1). The compressed air is supplied to the working chamber 21A surrounded by the cylinder 21 and the piston 23. When compressed air is supplied to the working chamber 21A of the air brake cylinder 20, the piston rod 23A moves in the direction of protruding from the cylinder 21 (right side in FIG. 1), and rotates the brake lever 32 clockwise in FIG. 1. On the other hand, when the compressed air is discharged from the working chamber 21A of the air brake cylinder 20, the piston 23 moves to the bottom surface side of the cylinder 21 (left side in FIG. 1) by the release spring 22, and rotates the brake lever 32 counterclockwise in FIG. 1.

[0020] (Transmission drive unit 30) The transmission drive unit 30 includes the above-mentioned brake lever 32, a spherical bearing 34 fitted into a spherical through hole 32A provided at the other end of the brake lever 32, and a cylindrical sleeve rod 35 to which the spherical bearing 34 is fixed on the outer peripheral surface. The transmission drive unit 30 includes a push rod 36 screwed into the inner surface of the sleeve rod 35. The base end side of the push rod 36 is screwed and connected inside the sleeve rod 35. A shoe head 37 is rotatably attached to the tip side of the push rod 36 via a connecting pin 36A. A hanger 38 is rotatably provided on the main body 31 via a connecting pin 31B. The shoe head 37 is rotatably attached to the hanger 38 via a connecting pin 36A. A brake wheel 2 is attached to the shoe head 37.

[0021] When the brake lever 32 rotates clockwise in Fig. 1 around the support shaft 33, the brake shoe 2 is pushed toward the tread 3A of the wheel 3 together with the sheath rod 35 and the push rod 36, 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 in Fig. 1 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 in Fig. 1 around the support shaft 33, the brake shoe 2 together with the sheath rod 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.

[0022] (Gap adjuster 40) The gap adjuster 40 is provided in the unit brake device 1 and constantly adjusts the gap between the brake shoe 2 and the wheel tread 3A to a constant value in accordance with wear of the brake shoe 2 and the wheel 3. A lever arm 32B that abuts against the gap adjuster 40 is provided near the lower end of the brake lever 32 on the left side in FIG. 1 . The gap adjuster 40 is provided on the outer periphery of the sheath rod 35 and includes a ratchet gear 35A that rotates in conjunction with the sheath rod 35, and a lever push rod 41 that abuts against the lever arm 32B of the brake lever 32. When the lever push rod 41 is pushed downward, the ratchet gear 35A rotates via a link (not shown), causing the sheath rod 35 to rotate. When the sheath rod 35 rotates, the push rod 36 moves in the direction that it protrudes from the sheath rod 35, bringing the brake shoe 2 closer to the wheel tread 3A.

[0023] A manual adjustment nut 39 that rotates in conjunction with the gap adjuster 40 is provided on the lower back side of the main body 31. The manual adjustment nut 39 is connected to the sheath rod 35 and rotates therewith. Therefore, when the sheath rod 35 is rotated by the gap adjuster 40, the manual adjustment nut 39 also rotates by the same amount. Conversely, the sheath rod 35 can be rotated by manually rotating the manual adjustment nut 39. Therefore, the position of the brake shoe 2 relative to the tread 3A of the wheel 3 can be manually adjusted. The manual adjustment nut 39 corresponds to the manual adjustment unit.

[0024] (Wear powder suction device 10) As shown in Figure 2, when the brake shoe 2 is pressed against the tread 3A of the wheel 3, wear powder is generated. For this reason, a wear powder suction device 10 that sucks up the wear powder is provided in the unit brake device 1. The wear powder suction device 10 includes a negative pressure source (not shown) that generates negative pressure, and a suction unit 11 that is connected to the negative pressure source by piping. The negative pressure source is provided in the body of the railway vehicle.

[0025] The suction portion 11 is an L-shaped cylindrical member. The suction portion 11 is provided out of contact with the brake shoe 2, and has a suction port 11A provided in a position facing the contact portion between the brake shoe 2 and the wheel 3. The suction portion 11 extends parallel to the axial direction of the push rod 36 and bends towards the contact portion between the brake shoe 2 and the wheel 3. The suction port 11A is located on the left side of the contact portion between the brake shoe 2 and the wheel 3 in Figure 2. The suction portion 11 sucks in wear powder generated when the brake shoe 2 is pressed against the wheel 3.

[0026] The wear debris suction device 10 includes a first holder 12, a second holder 13, a suction portion guide 16, a conversion portion 18, and a transmission portion 50. The suction portion guide 16 is a cylindrical member through which the suction portion 11 passes. The first holder 12 and the second holder 13 axially sandwich the suction portion guide 16 and rotatably hold the suction portion guide 16. The first holder 12 and the second holder 13 are fixed together with bolts 14 and nuts 15. Bearings 17 are provided between the inner walls of the first holder 12 and the second holder 13 and the outer wall of the suction portion guide 16, respectively. The first holder 12 includes a fixed portion 12A that is fixed to the side wall of the main body 31 of the unit brake device 1. The fixed portion 12A is fixed to the main body 31 with a bolt. The first holder 12 and the second holder 13 may be integral as long as the suction portion guide 16 is rotatably supported.

[0027] As shown in FIG. 3 , the transmission unit 50 is connected to the manually adjustable nut 39 and transmits the rotational motion of the manually adjustable nut 39. The transmission unit 50 includes a first gear 51 and a second gear 52. The first gear 51 is fixed coaxially with the rotation axis of the manually adjustable nut 39. The second gear 52 is provided on the outer periphery of the suction part guide 16 and meshes with the first gear 51 to transmit the rotational motion to the conversion unit 18. When the first gear 51 rotates together with the manually adjustable nut 39, the first gear 51 rotates the second gear 52, which in turn rotates the suction part guide 16.

[0028] As shown in FIG. 2, the conversion unit 18 converts the rotational motion input via the transmission unit 50 into linear motion. The suction unit 11 is moved by this linear motion in a direction in which the brake shoe 2 is pressed against the wheel 3. A male thread 18A is formed on the outer peripheral surface of the suction unit 11. A female thread 18B that meshes with the male thread 18A is formed on the inner peripheral surface of the suction unit guide 16. When the suction unit guide 16 rotates, the suction unit 11 moves axially via the male thread 18A and the female thread 18B. In other words, the female thread 18B of the suction unit guide 16 screws the male thread 18A of the suction unit 11 in the axial direction, and the suction unit 11 moves from the suction unit guide 16 in a direction in which the brake shoe 2 approaches the tread 3A of the wheel 3.

[0029] (action) Next, the operation of the wear debris suction system configured as above will be described. 2, when the negative pressure source is activated, the suction unit 11 sucks in wear powder. The wear powder located near the suction port 11A of the suction unit 11 is sucked in. The wear powder sucked into the suction port 11A passes through the suction unit 11 and the piping and is collected.

[0030] As shown in Fig. 1, when the gap between the brake wheel 2 and the tread surface 3A of the wheel 3 widens, the rotation angle of the brake lever 32 increases, and the lever push rod 41 is pushed downward by the lever arm portion 32B. When the lever push rod 41 is pushed downward, the ratchet gear 35A is rotated via a link (not shown) and the sheath rod 35 rotates. When the sheath rod 35 rotates, the push rod 36 is displaced in the direction protruding from the sheath rod 35, so that the initial position of the brake wheel 2 is brought closer to the tread surface 3A of the wheel 3. At this time, the manual adjustment nut 39 rotates by the same amount as the sheath rod 35 rotates.

[0031] As shown in Figs. 2 and 3, when the first gear 51 rotates together with the manual adjustment nut 39, the second gear 52 is rotated by the first gear 51, and the suction guide 16 is rotated by the second gear 52. Therefore, the transmission unit 50 transmits the rotational movement of the manual adjustment nut 39 to the suction guide 16.

[0032] When the suction guide 16 rotates, the male screw 18A of the suction unit 11 is screwed axially by the female screw 18B of the suction guide 16, and the suction unit 11 is moved in the direction in which the brake wheel 2 approaches the tread surface 3A of the wheel 3 from the suction guide 16. Therefore, even if the contact position between the brake wheel 2 and the tread surface 3A of the wheel 3 is displaced, the suction unit 11 can suck at the contact position by moving the suction unit 11 in accordance with the change in the initial position of the brake wheel 2.

[0033] The suction unit 11 is provided in a state of not contacting the brake wheel 2, and a suction port 11A is provided at a position facing the contact portion between the brake wheel 2 and the wheel 3. For this reason, when replacing the brake wheel 2, the brake wheel 2 can be removed from the shoe head 37 while the suction unit 11 and the piping are connected.

[0034] (Effect) Next, the effects of the first embodiment will be described. (1-1) Utilize the rotation of the manual adjustment nut 39 that rotates in conjunction with the gap adjuster 40 to move the suction unit 11 that sucks the wear powder in the direction in which the brake wheel 2 is pressed against the wheel 3. Since the gap adjuster 40 rotates when the contact position between the brake wheel 2 and the wheel 3 is displaced due to wear, the suction unit 11 can also be moved in response to this rotation. Therefore, even if the contact position between the brake wheel 2 and the wheel 3 is displaced, it is possible to suck without reducing the dust collection efficiency.

[0035] (1-2) The suction unit 11 is provided in a state where it does not contact the brake wheel 2. For this reason, when replacing the brake wheel 2, the suction unit 11 does not get in the way, and even if there is a suction unit 11, the brake wheel 2 can be easily replaced.

[0036] (1-3) By meshing the first gear 51 and the second gear 52, the rotational movement of the manual adjustment nut 39 can be transmitted to rotate the suction unit guide 16 provided with the conversion unit 18. Also, by changing the sizes of the first gear 51 and the second gear 52, the amount of movement of the suction unit 11 can be changed.

[0037] (1-4) When the suction unit guide 16 rotates, the suction unit 11 can be converted into a linear motion via the male screw 18A and the female screw 18B and moved in the direction in which the brake wheel 2 is pressed against the wheel 3.

[0038] (Second Embodiment) Hereinafter, with reference to FIG. 4, a second embodiment of the wear powder suction system will be described. The configuration of the transmission part of the wear powder suction system in this embodiment is different from that of the first embodiment described above. Hereinafter, the description will focus on the differences from the first embodiment.

[0039] As shown in FIG. 4, the transmission unit 60 includes an endless belt 63. The endless belt 63 is looped around the manual adjustment nut 39 and the suction unit guide 16 provided with the conversion unit 18. A first pulley 61 around which the endless belt 63 is looped is coaxially fixed to the rotation axis of the manual adjustment nut 39. A second pulley 62 around which the endless belt 63 is looped is provided on the outer periphery of the suction unit guide 16. The endless belt 63 is looped around the first pulley 61 and the second pulley 62, and transmits the rotation of the first pulley 61 to the second pulley 62. That is, when the manual adjustment nut 39 rotates, the suction unit guide 16 is rotated via the endless belt 63 in the transmission unit 60.

[0040] (Operation) Next, the operation of the wear powder suction system configured as described above will be described. As shown in FIG. 1, when the gap between the brake wheel 2 and the tread 3A of the wheel 3 widens, the rotation angle of the brake lever 32 increases, and the lever push rod 41 is pushed downward by the lever arm portion 32B. When the lever push rod 41 is pushed downward, the ratchet gear 35A is rotated via a link (not shown), and the sheath rod 35 rotates. When the sheath rod 35 rotates, the push rod 36 is displaced in the direction protruding from the sheath rod 35, so that the initial position of the brake wheel 2 approaches the tread 3A of the wheel 3. At this time, the manual adjustment nut 39 rotates by the same amount as the sheath rod 35 rotates.

[0041] As shown in FIG. 4, when the first pulley 61 rotates together with the manual adjustment nut 39, the second pulley 62 is rotated via the endless belt 63 by the first pulley 61, and the suction unit guide 16 is rotated by the second pulley 62. Therefore, the transmission unit 60 transmits the rotational motion of the manual adjustment nut 39 to the suction unit guide 16.

[0042] When the suction guide 16 rotates, the male screw 18A of the suction unit 11 is screwed axially by the female screw 18B of the suction guide 16, and the suction unit 11 is moved in a direction approaching the tread 3A of the wheel 3 by the brake wheel 2. Therefore, even if the contact position between the brake wheel 2 and the tread 3A of the wheel 3 is displaced, the suction unit 11 can suck at the contact position by moving the suction unit 11 in accordance with the change in the initial position of the brake wheel 2.

[0043] (Effect) Next, the effects of the second embodiment will be described. In addition to the effects of (1-1), (1-2), and (1-4) of the first embodiment, the following effects are achieved.

[0044] (2-1) By stretching an endless belt 63 between the manual adjustment nut 39 and the suction guide 16 provided with the conversion unit 18, the rotational motion of the manual adjustment nut 39 can be transmitted to rotate the suction guide 16. Further, the amount of movement of the suction unit 11 can be changed by changing the size of the first pulley 61 of the manual adjustment nut 39 and the size of the second pulley 62 of the suction guide 16.

[0045] (Third Embodiment) Hereinafter, with reference to FIG. 5, a third embodiment of the wear powder suction system will be described. The wear powder suction system of this embodiment is different from that of the first embodiment in the configuration of the transmission unit. Hereinafter, the description will focus on the differences from the first embodiment.

[0046] As shown in FIG. 5, the transmission unit 70 includes a first pinion 71, a second pinion 72, and a rack 73. The first pinion 71 is fixed coaxially with the rotation axis of the manual adjustment nut 39. The rack 73 meshes with the first pinion 71 and converts the rotational motion of the first pinion 71 into a linear motion. The second pinion 72 is provided on the outer periphery of the suction guide 16 where the conversion unit 18 is provided, meshes with the rack 73, and converts the linear motion of the rack 73 into a rotational motion. The rack 73 is supported by a support member (not shown) so as to be linearly movable. When the first pinion 71 rotates together with the manual adjustment nut 39, the transmission unit 70 rotates the suction guide 16 by the linear motion of the rack 73.

[0047] (Operation) Next, the operation of the wear powder suction system configured as described above will be described. As shown in FIG. 1, when the gap between the brake wheel 2 and the tread 3A of the wheel 3 widens, the rotation angle of the brake lever 32 increases, and the lever push rod 41 is pushed downward by the lever arm portion 32B. When the lever push rod 41 is pushed downward, the ratchet gear 35A is rotated via a link (not shown), and the sheath rod 35 rotates. When the sheath rod 35 rotates, the push rod 36 is displaced in the direction protruding from the sheath rod 35, so that the initial position of the brake wheel 2 approaches the tread 3A of the wheel 3. At this time, the manual adjustment nut 39 rotates by the same amount as the sheath rod 35 rotates.

[0048] As shown in FIG. 5, when the first pinion 71 rotates together with the manual adjustment nut 39, the rack 73 is moved by the first pinion 71, the second pinion 72 is rotated, and the suction guide 16 is rotated by the second pinion 72. Therefore, the transmission unit 70 transmits the rotational motion of the manual adjustment nut 39 to the suction guide 16.

[0049] When the suction guide 16 rotates, the male screw 18A of the suction unit 11 is screwed axially by the female screw 18B of the suction guide 16, and the suction unit 11 is moved in a direction approaching the tread 3A of the wheel 3 by the brake wheel 2. Therefore, even if the contact position between the brake wheel 2 and the tread 3A of the wheel 3 is displaced, the suction unit 11 can suck at the contact position by moving the suction unit 11 in accordance with the change in the initial position of the brake wheel 2.

[0050] (Effect) Next, the effects of the third embodiment will be described. In addition to the effects of (1-1), (1-2), and (1-4) of the first embodiment, the following effects are achieved.

[0051] (3-1) The rotational motion of the manual adjustment nut 39 can be transmitted by the first pinion 71, the rack 73, and the second pinion 72 to rotate the suction guide 16 provided with the conversion unit 18. Further, the amount of movement of the suction unit 11 can be changed by changing the size of the first pinion 71 of the manual adjustment nut 39 and the size of the second pinion 72 of the suction guide 16.

[0052] (Other Embodiments) Each of the above embodiments can be implemented with the following modifications. Each of the above embodiments and the following modification examples can be implemented in combination with each other within a technically non - conflicting range.

[0053] · In each of the above embodiments, the suction port 11A of the suction unit 11 may expand in the moving direction of the brake wheel 2. Also, the suction port 11A of the suction unit 11 may expand in the vertical direction, which is the extending direction of the brake wheel 2.

[0054] · In each of the above embodiments, the wear powder suction device 10 is fixed to the left side wall in FIG. 1 of the main body 31 of the unit brake device 1. However, the wear powder suction device 10 may be fixed to the right side wall in FIG. 1 of the main body 31 of the unit brake device 1.

[0055] · In each of the above embodiments, the wear powder suction device 10 was fixed to the main body 31 of the unit brake device 1. However, the wear powder suction device 10 may be fixed to the vehicle body. · In each of the above embodiments, the manual adjustment nut 39 that rotates in conjunction with the gap adjuster 40 was used. However, as long as it can rotate in conjunction with the gap adjuster 40, it is not limited to a nut, and other configurations may be used.

[0056] · In each of the above embodiments, the transmission parts 50, 60, 70 transmitted the rotational movement of the manual adjustment nut 39 to the conversion part 18. However, the transmission parts 50, 60, 70 may be omitted, and the rotational movement of the manual adjustment part may be directly converted into a linear movement by the conversion part.

[0057] · In each of the above embodiments, the strut arm part 32B pushed down the strut push rod 41 to rotate the ratchet gear 35A and thereby rotate the sheath rod 35 to form the gap adjuster 40. However, the mechanism for gap adjustment is not limited to this, and other configurations may be used as long as it includes a manual adjustment part that rotates in conjunction with the gap adjuster.

[0058] · In each of the above embodiments, the unit brake device 1 includes an air brake cylinder 20 that outputs a braking force by air. However, the unit brake device 1 is not limited to air, and may include an electric motor that outputs a braking force by electricity.

[0059] · In each of the above embodiments, those composed of a plurality of objects may integrate the plurality of objects, and conversely, those composed of one object may be divided into a plurality of objects. Whether integrated or not, it may be configured so that the object of the invention can be achieved.

Explanation of Reference Numerals

[0060] 1... Unit brake device 2... Retarder 3... Wheel 3A... Tread 10... Wear powder suction device 11... Suction part 11A... Suction port 12… First Holder 12A… Fixed Part 13… Second Holder 14… Bolt 15… Nut 16… Suction Guide 17… Bearing 18… Conversion Part 18A… Male Thread 18B… Female Thread 20… Air Brake Cylinder 20A… Supply Port 21… Cylinder 21A… Working Chamber 22… Slack Spring 23… Piston 23A… Piston Rod 24… Connecting Pin 30… Transmission Driving Part 31… Main Body 31B… Connecting Pin 32… Brake Lever 32A… Spherical Through-Hole 32B… Lever Arm 33… Support Shaft 34… Spherical Bearing 35… Sleeve Rod 35A… Ratchet Gear 36… Push Rod 36A… Connecting Pin 37… Shoe Head 38… Hanger 39… Manual Adjusting Nut (Manual Adjusting Part) 40… Clearance Adjuster 41… Lever Push Rod 50… Transmission Part 51… First Gear 52… Second Gear 60… Transmission Part 61… First Pulley 62… Second Pulley 63… Endless Belt 70… Transmission Part 71… First Pinion 72… Second Pinion 73… Rack

Claims

1. A gap adjuster provided in a unit brake device for adjusting a gap between a brake wheel of the unit brake device and a wheel against which the brake wheel is pressed, A manual adjustment part that rotates in conjunction with the gap adjuster for manually adjusting the gap between the brake wheel and the wheel, A conversion part that converts the rotational motion of the manual adjustment part into a linear motion, A suction part that sucks wear powder generated when the brake wheel is pressed against the wheel, comprising: The suction part moves in a direction in which the brake wheel is pressed against the wheel by the linear motion A wear powder suction system.

2. The suction part is provided in a state of not contacting the brake wheel, A suction port is provided at a position facing the contact part between the brake wheel and the wheel The wear powder suction system according to claim 1.

3. A first gear fixed coaxially with the rotation axis of the manual adjustment part, A second gear that meshes with the first gear and transmits the rotational motion to the conversion part, comprising: When the first gear rotates together with the manual adjustment part, the second gear rotates, whereby the conversion part rotates The wear powder suction system according to claim 1.

4. An endless belt bridged between the manual adjustment part and the conversion part, When the manual adjustment part rotates, the conversion part rotates via the endless belt The wear powder suction system according to claim 1.

5. A first pinion fixed coaxially with the rotation axis of the manual adjustment part, A rack that meshes with the first pinion and converts the rotational motion of the first pinion into a linear motion, A second pinion provided on the outer periphery of the conversion part, meshing with the rack, and converting the linear motion of the rack into a rotational motion, comprising: When the first pinion rotates together with the manual adjustment part, the rack moves linearly, whereby the conversion part rotates The wear powder suction system according to claim 1.

6. The suction part is a cylindrical member that penetrates the conversion part and has a male thread formed on its outer peripheral surface, A female thread that meshes with the male thread is formed on the inner surface of the conversion part, When the conversion part rotates, the suction part moves via the male thread and the female thread The wear powder suction system according to any one of claims 1 to 4.

7. It is provided in a unit brake device and is connected to a manual adjustment part that rotates in conjunction with a gap adjuster for adjusting the gap between a braking wheel of the unit brake device and a wheel against which the braking wheel is pressed, and a conversion part that converts the rotational movement of the manual adjustment part into linear movement, a suction part that sucks wear powder generated when the braking wheel is pressed against the wheel, and the suction part moves in a direction in which the braking wheel is pressed against the wheel by the linear movement Wear powder suction device.

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