JP2008051170A - Railroad vehicle caliper brake device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a railroad vehicle caliper brake device for preventing the uneven wear of a lining. <P>SOLUTION: The caliper brake device comprises first and second brackets 36, 37 formed on a supporting frame 20 for supporting both ends of an upper supporting pin 30, and a bearing housing 38 formed at a caliper body 10 for rockingly supporting the upper supporting pin 30 via a bearing 100. The bearing 100 is arranged so that its center line G2 passes through the whole gravity center position W1 of the caliper body 10. When the caliper body 10 is moved relative to the supporting frame 20 in the X-axial direction of upper and lower supporting pins 30, 32, the bearing 100 is kept at a constant position relative to the caliper body 10. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an improvement in a caliper brake device for a railway vehicle that includes a frame body fastened to a bogie of the railway vehicle and a caliper body that is slidably supported via two pins provided on the frame body. Is.

  Conventionally, as this type of caliper brake device for a railway vehicle, there is one shown in FIGS. 3 to 5 (see Patent Document 1).

  This will be described. As shown in FIGS. 3 and 4, the caliper brake device 1 for a railway vehicle includes a support frame 20 fixed on a vehicle carriage, and upper and lower support pins 30 provided on the support frame 20. The caliper main body 10 is supported via 32. The support frame 20 is fixed on the bogie of the vehicle via a groove 22 provided on the lower surface side thereof. 3 to 5, the description will be made on the assumption that the vehicle discharge device X-axis extends to a substantially horizontal lateral direction, the Y-axis extends to a substantially vertical direction, and the Z-axis extends to a substantially horizontal front-rear vehicle discharge device.

  The caliper body 10 includes first and second caliper arm portions 12 and 14 that extend so as to straddle the disk rotor of the wheel 5, and the first caliper arm portion 12 is provided with two hydraulic pistons 40. The first caliper arm portion 12 is provided with a brake clearance adjuster 50 that automatically adjusts the brake clearance.

  The first caliper arm portion 12 supports the control member 70 via the upper anchor block 60 and the lower anchor block 80. The upper anchor block 60 is fastened to the upper end portion of the first caliper arm portion 12 via the anchor bolt 62. The upper anchor block 60 receives the upper end portion of the restrictor 70 via the anchor pin 64. The lower anchor block 80 is fastened to the lower end portion of the first caliper arm portion 12 via the anchor bolt 82. The lower anchor block 80 receives the lower end portion of the restrictor 70 via the anchor pin 84.

  Similarly, the second caliper arm portion 14 supports the control member 70 via an upper anchor block 60a and a lower anchor block.

  The rail caliper brake device 1 is provided with a hydraulic piston 40 for pressing the brake restrictor 70 only on the first caliper arm portion 12 side of the brake caliper body 10, but the second caliper arm portion 14 is provided with the restrictor 70. A hydraulic piston for pressing is not provided. Therefore, the caliper body 10 is floating supported by the upper and lower support pins 30 and 32 so as to be slidable in the X-axis direction.

  When the brake is actuated, the hydraulic pressure guided to the hydraulic piston 40 increases, and when the hydraulic piston 40 is pushed out of the first caliper arm portion 12, the brake clearance disappears and the control 70 contacts the disc rotor, the reaction force is reduced. In response, the first caliper arm portion 12 moves away from the wheel 5, and when the second caliper arm portion 14 approaches the wheel 5, the control member 70 of the second caliper arm portion 14 is pressed by the disc rotor 6, The first and second caliper arm portions 12 and 14 sandwich the disc rotor to brake the rotation of the wheel 5.

  When the brake is released, the operating oil pressure guided to the hydraulic piston 40 decreases, and the hydraulic piston 40 is pulled in by the urging force of the return spring, so that the hydraulic brake 70 is separated from the disc rotor.

  As shown in FIG. 4, the caliper body 10 has first and second bracket portions 12a and 14a, and both end portions of the upper support pin 30 are made of rubber bushes 122 on the first and second bracket portions 12a and 14a. , 124.

  As shown in FIG. 5, between the first and second bracket portions 12 a and 14 a and the support frame 20, a vehicle discharge device boot made of rubber discharge device for a vehicle is interposed, and the upper support pin 30. The exposed part is protected from dust.

  The upper support pin 30 penetrates the support frame 20, and the spherical bearing 100 is interposed between the support frame 20 and the upper support pin 30, and a rubber bush 210 is interposed on one side of the bearing 100. The rubber bush 210 is fixed by fitting its outer peripheral portion into the hole 224 of the support frame 20.

  The spherical bearing 100 has its outer race (outer ring) fixed in the hole 222 of the support frame 20 via the snap ring 102, while the upper support pin 30 is slidably fitted to the inner race (inner ring) 106. To do.

  Thus, the bearing 100 supports the caliper body 10 so as to be swingable in the direction of arrow A and in the direction indicated by arrow T in FIG. 4 with respect to the support frame 20, and follows the swing of the wheel 5 relative to the carriage. The caliper body 10 is floatingly supported with respect to the frame 20 so as to be slidable in the X-axis direction of the upper support pin 30.

  By the way, the first caliper arm portion 12 provided with the hydraulic piston 40, the brake clearance adjuster 50 and the like is heavier than the second caliper arm portion 14 where these are not provided, and therefore the center line G2 of the bearing 100 is set to the width of the wheel 5. When arranged on the direction center line G1, the caliper body 10 rotates about the Z axis as shown by an arrow A in FIG. Will cause uneven wear of the lining. In this case, the lining attached to the heavy weight first caliper arm portion 12 is in contact with the disk rotor at the lower end, while the lining attached to the light weight second caliper arm portion 14 is The upper end portion contacts the disk rotor, and the upper and lower end portions of the linings that contact the disk rotor are subject to partial wear.

  As a countermeasure, the center line G2 of the bearing 100 is offset toward the first caliper arm 12 with respect to the center line G1 in the width direction of the wheel 5, and the center line G2 of the bearing 100 passes through the center of gravity position W1 of the caliper body 10 as a whole. Are arranged as follows.

This prevents the caliper body 10 from rotating in the direction indicated by the arrow A in FIG. 5 with respect to the support frame 20, so that the attitude of the control member 70 facing the disc rotor of the wheel 5 in parallel. Kept.
Japanese Patent Laid-Open No. 08-226467

  However, in such a conventional railcar caliper brake device, the outer race of the bearing 100 is fixed to the support frame 20, and the upper support pin 30 slides in the X-axis direction with respect to the inner race of the bearing 100. Due to the structure, when the wear of the two linings sandwiching the disk rotor of the wheel 5 progresses, the center line G2 of the bearing 100 moves from the center of gravity position W1 of the caliper body 10 as a whole to the first caliper in the X-axis direction of the vehicle discharge device. The discharge device for the vehicle is displaced toward the arm portion 12 (direction in FIG. 4), the caliper body 10 is inclined with respect to the support frame 20, and the disk rotor of the wheel 5 and the lining of the control ring 70 do not face each other in parallel. There is a problem that uneven wear of the lining occurs.

  The present invention has been made in view of the above problems, and an object thereof is to provide a caliper brake device for a railway vehicle that prevents uneven wear of the lining.

  The present invention relates to a support frame that is fixed to a carriage, a caliper body that is slidably supported in the axial direction by upper and lower support pins provided on the support frame, and a pair of restrictors that sandwich a disc rotor of a wheel. The caliper body can be swung relative to the first and second caliper arm parts of the caliper body, the hydraulic piston that presses the brake member provided on the first caliper arm part against the disk rotor, and the upper support pin. In a caliper brake device for a railway vehicle comprising a bearing for supporting the upper support pin, first and second bracket portions for supporting both ends of the upper support pin are formed on the support frame, and the upper support pin is slid on the caliper body via the bearing. A bearing housing part that is movably supported is formed and arranged so that the center line G2 of the bearing passes through the center of gravity position W1 of the entire caliper body. Body, characterized in that it has a configuration in which the position of the bearing is maintained constant with respect to the caliper body when moving in the axial direction of the upper and lower support pin with respect to the support frame.

  According to the present invention, when wear of the respective control members sandwiching the disk rotor of the wheel progresses, the vehicle discharge device is also the vehicle discharge device, and the bearing center line G2 may be displaced from the center of gravity position W1 of the entire caliper body. In addition, the attitude of the restrictor lining facing the disk rotor in parallel is maintained, and the lining of the restrictor can be prevented from being unevenly worn.

  Embodiments of the present invention will be described below with reference to FIGS. 1 and 2 of the accompanying drawings. In addition, the same code | symbol is attached | subjected to the same structure part as the said prior art example.

  FIG. 1 is a plan view of a caliper brake device 1 for a railway vehicle, and FIG. 2 is a cross-sectional view of the caliper brake device 1 including upper and lower support pins 30 and 32. Here, three axes X, Y, and Z orthogonal to each other are set, the X axis extends in the horizontal horizontal direction, the Y axis extends in the vehicle discharge device vertical vehicle discharge device direction, and the Z axis extends in the horizontal front-rear direction. The configuration of the caliper brake device 1 will be described.

  The caliper brake device 1 holds the disc rotor 6 of the wheel 5 between a pair of restrictors 70 to apply braking.

  Each restrictor 70 includes a lining member 74 that is pressed against the disk rotor 6, and the lining member 74 is attached to be exchangeable via a support race 100.

  The caliper brake device 1 for a railway vehicle includes a support frame 20 fixed on a cart (not shown) of the vehicle, and a caliper body 10 supported via upper and lower support pins 30 and 32 provided on the support frame 20. .

  The caliper body 10 includes first and second caliper arm portions 12 and 14 that extend so as to straddle the disc rotor 6 of the wheel 5, and the first caliper arm portion 12 is provided with a plurality of hydraulic pistons (not shown).

  The first caliper arm portion 12 supports the brake member 70 via an upper anchor block 60 and a lower anchor block (not shown). The upper anchor block 60 is fastened to the upper end portion of the first caliper arm portion 12 via an anchor bolt 62 and receives the upper end portion of the restrictor 70 via an anchor pin 64. The lower anchor block is fastened to the lower end portion of the first caliper arm portion 12 via an anchor bolt, and receives the lower end portion of the restrictor 70 via an anchor pin.

  Similarly, the second caliper arm portion 14 supports the brake member 70 via an upper anchor block 60a, a lower anchor block, and the like.

  The caliper body 10 is floatingly supported by the upper and lower support pins 30 and 32 so as to be slidable in the X-axis direction. The upper and lower support pins 30 and 32 are fixed to the support frame 20 and arranged so as to extend in the X-axis direction parallel to the rotation axis of the wheel 5.

  As shown in FIG. 2, first and second bracket portions 36 and 37 that support both end portions of the upper support pin 30 are integrally formed with the support frame 20. The upper support pin 30 is fitted to the first and second bracket portions 36 and 37 via bushes 122 and 124, and a flange portion 30 a formed at one end thereof abuts against the second bracket portion 17 via the bush 124. The nut 125 screwed into the screw portion 30b formed at the other end is fixed by coming into contact with the first bracket portion 16 via the bush 122.

  A bearing housing portion 38 that slidably supports the upper support pin 30 is formed integrally with the caliper body 10. The upper support pin 30 passes through the bearing housing portion 38, and the spherical bearing 100 and the rubber first and second bushes 110 and 112 are interposed between the bearing housing portion 38 and the upper support pin 30.

  The spherical bearing 100 includes an outer race (outer ring) 105 and an inner race (inner ring) 106 having bearing surfaces that are slidably fitted to each other, and the outer race 105 and the inner race 106 are engaged with each other so as to be relatively rotatable. .

  When the caliper body 10 moves in the X-axis direction of the upper and lower support pins 30 and 32 with respect to the support frame 20, the position of the bearing 100 with respect to the caliper body 10 is kept constant.

  The outer race 101 of the bearing 100 is fitted to the hole 39 of the bearing housing portion 38 at its outer peripheral portion, and is fixed via a snap ring 41.

  The inner race 106 of the bearing 100 is slidably fitted to the upper support pin 30. A sliding bush 109 is provided on the outer periphery of the outer race 101.

  Thus, the bearing 100 supports the caliper body 10 so as to be swingable with respect to the support frame 20, and the caliper body 10 swings following the swing of the wheel 5 with respect to the carriage, and also with respect to the support frame 20. The caliper body 10 is floatingly supported so as to be slidable in the X-axis direction of the upper support pin 30.

  The center line G2 of the bearing 100 is offset by a predetermined amount S toward the first caliper arm portion 12 with respect to the center line G1 in the width direction of the wheel 5, and the center line G2 of the bearing 100 passes through the center of gravity position W1 of the caliper body 10 as a whole. Are arranged as follows.

  As a result, the weight of the caliper body 10 is supported so as to be balanced through the bearing 100, and the caliper body 10 does not rotate around the Z axis with respect to the support frame 20, and the control member 70 with respect to the disk rotor 6. The attitude of the linings 74 facing each other in parallel is maintained.

  The first and second rubber bushings 110 and 112 have their outer peripheral portions fitted and fixed in the respective holes 42 of the bearing housing portion 38, and their inner peripheral portions are slidably fitted to the outer peripheral surface of the upper support pin 30. Combined.

  A rubber boot 130 is interposed between the first and second bracket portions 36 and 37 and the bearing housing portion 38 to protect the exposed portion of the upper support pin 30 from dust.

  Both ends of the lower support pin 32 are supported by the first and second bracket portions 26 and 27 of the caliper body 10 via bushes 122 and 124, and the middle of the lower support pin 32 is slidable on the bearing housing portion 28 of the support frame 20. Supported by A sleeve 29 that slidably supports the lower support pin 32 is interposed inside the bearing housing portion 28, and a rubber bush 31 is interposed between the sleeve 29 and the bearing housing portion 28.

  A rubber boot 130 is interposed between the first and second bracket portions 26 and 27 and the bearing housing portion 28 to protect the exposed portion of the lower support pin 32 from dust.

  The rail car caliper brake device 1 is configured as described above. Next, the operation and effect will be described.

  When the brake is actuated, the hydraulic pressure guided to the hydraulic piston of the caliper body 10 increases, and when the hydraulic piston is pushed out of the first caliper arm portion 12, the brake clearance disappears and the control 70 contacts the disc rotor. The first caliper arm portion 12 is moved in a direction away from the wheel 5 in response to the force, and when the second caliper arm portion 14 approaches the wheel 5, the control member 70 of the second caliper arm portion 14 is pressed against the disc rotor 6. The first and second caliper arm portions 12 and 14 each brake device 70 of the vehicle discharge device sandwiches the vehicle discharge device disk rotor, and the rotation of the wheel 5 is braked.

  When the brake is released, the operating oil pressure guided to the hydraulic piston is reduced, and the hydraulic piston is pulled in by the urging force of the return spring, and the brake 70 is separated from the disc rotor.

  The bearing 100 supports the caliper body 10 to be swingable with respect to the support frame 20, and the caliper body 10 swings following the swing of the wheel 5 with respect to the carriage.

  By arranging the center line G2 of the bearing 100 so as to pass through the center of gravity position W1 of the caliper body 10 as a whole, the gravity acting on the caliper body 10 and the hydraulic piston is balanced with the bearing 100 as a fulcrum, and the caliper body 10 is supported by the support frame 20. On the other hand, as shown by the arrow A in FIG.

  The outer race 105 of the bearing 100 is fixed to the bearing housing portion 38 of the caliper body 10, the inner race 106 of the bearing 100 is slidably fitted to the upper support pin 30, and the bearing is mounted on the discharge device support frame 20 for the vehicle. 100 Since the discharge device for a vehicle slides in the X-axis direction, even when wear of the two linings 74 sandwiching the disk rotor 6 of the wheel 5 progresses, the center line G2 of the bearing 100 is the entire caliper body 10 The center of gravity position W1 of the rim 74 is not deviated, and the attitude of the lining 74 of the restrictor 70 facing the disk rotor 6 in parallel is maintained, so that the lining 74 can be prevented from being unevenly worn.

  In the present embodiment, the support frame 20 fixed to the bogie of the railway vehicle, and the caliper body 10 supported by the upper and lower support pins 30 and 32 provided on the support frame 20 so as to be slidable in the X-axis direction. The first and second caliper arm portions 12 and 14 of the caliper main body 10 that respectively support the pair of wheel restrictors 70 sandwiching the disk rotor 6 of the wheel 5, and the wheel restrictor 70 provided on the first caliper arm portion 12 are connected to the disk. In the caliper brake device 1 for a railway vehicle including a hydraulic piston that presses against the rotor 6 and a bearing 100 that supports the caliper body 10 so as to be swingable with respect to the upper support pin 30, both ends of the upper support pin 30 are provided on the support frame 20. The first and second bracket portions 36 and 37 for supporting the portion are formed, and the upper support pin 30 can be slid on the caliper body 10 via the bearing 100. The bearing housing portion 38 is formed so that the center line G2 of the bearing 100 passes through the center of gravity position W1 of the entire caliper main body 10, and the caliper main body 10 is positioned between the upper and lower support pins 30 and 32 with respect to the support frame 20. Since the position of the bearing 100 with respect to the caliper main body 10 is kept constant when moving in the X-axis direction, even when wear of each of the control elements 70 sandwiching the disk rotor 6 of the wheel 5 progresses, The center line G2 does not deviate from the center of gravity position W1 of the caliper body 10 as a whole, and the posture in which the lining 74 of the restrictor 70 faces the disk rotor 6 in parallel can be prevented, thereby preventing the lining 74 from being unevenly worn. .

  In this embodiment, the bearing 100 includes an outer race 105 and an inner race 106 that engage with each other so as to be relatively rotatable. The outer race 105 is fixed to the bearing housing portion 100 of the caliper body 10, and the inner race 106 is slid onto the upper support pin 30. Since the caliper body 10 is movably fitted, the position of the bearing 100 relative to the caliper body 10 is kept constant even when the caliper body 10 moves in the X-axis direction of the upper and lower support pins 30 and 32 with respect to the support frame 20, and the lining 74 is Uneven wear can be prevented.

  The present invention is not limited to the above-described embodiment, and it is obvious that various modifications can be made within the scope of the technical idea.

The top view of the caliper brake device for rail vehicles which shows embodiment of this invention. Sectional drawing of the caliper brake device for rail vehicles similarly. The side view of the caliper brake device for rail vehicles which shows a prior art example. The top view of the caliper brake device for rail vehicles similarly. Sectional drawing of the caliper brake device for rail vehicles similarly.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Railcar caliper brake device 5 Wheel 6 Disc rotor 10 Caliper brake main body 12 First caliper arm part 14 Second caliper arm part 18 Bearing housing part 19 Guide surface 20 Support frame 30 Upper support pin 32 Lower support pins 36, 37 First, second bracket portion 38 Bearing housing portion 70 Bracket 100 Bearing 105 Outer race 106 Inner race

Claims (2)

A support frame that is fixed to the carriage, a caliper body that is slidably supported in the axial direction by upper and lower support pins provided on the support frame, and a pair of control wheels that sandwich the disk rotor of the wheel are supported. First and second caliper arm portions of the caliper main body, a hydraulic piston that presses the disc brake provided on the first caliper arm portion against the disk rotor, and the caliper main body swings with respect to the upper support pin. In a caliper brake device for a railway vehicle comprising a bearing that can be supported,
A bearing housing part is slidably supported on the caliper body via the bearing, and first and second bracket parts are formed on the support frame to support both ends of the upper support pin. The caliper body is arranged so that the center line G2 of the bearing passes through the center of gravity position W1 of the entire caliper body, and the caliper body moves in the axial direction of the upper and lower support pins with respect to the support frame. A caliper brake device for a railway vehicle, characterized in that the position of the bearing with respect to is maintained constant.   The bearing includes an outer race and an inner race that engage with each other so as to be relatively rotatable. The outer race is fixed to a bearing housing portion of the caliper body, and the inner race is slidably fitted to the upper support pin. The caliper brake device for a railway vehicle according to claim 1.