JP5719641B2 - Tread cleaning device - Google Patents

Description

  The present invention relates to a wheel tread cleaning device and a railway vehicle including the tread cleaning device.

  In general, railcars that run on a track have rust, dust, gravel, etc. attached to the treads of wheels during long distances, and these dusts, etc. intervene between the tread and the track, damage the track and cause abnormal noise. In the worst case, there is a risk of derailment.

  Patent Document 1 discloses a conventional tread cleaning device that is assembled to a vehicle body of a railway vehicle and removes dust and the like adhering to the tread during traveling of the railway vehicle. This tread cleaning device has a torque receiving rod to which a polishing portion that comes into contact with the tread of a wheel is attached. The torque receiving rod slides in the cylinder by air pressure while being urged by the return spring. Further, the tread cleaning device has a guide mechanism that limits the movement of the torque receiving rod in the axial direction and prevents the polishing portion from rotating. This mechanism comprises a groove provided on the outer periphery of the torque receiving rod and a pin that is attached to the cylinder and fits into the groove.

JP 2000-225945 A

  However, in the conventional guide mechanism, since the pin is fitted in the groove of the torque receiving rod, the pin and the groove are greatly worn, the life is short, and the movement of the torque receiving rod cannot be restricted in the axial direction. was there.

  An object of this invention is to provide the tread cleaning apparatus which has a guide mechanism with little abrasion in view of said problem.

  The tread cleaning device according to the present invention includes a cylinder, a torque receiving rod that is slidably inserted into the cylinder and is movable by fluid pressure introduced into the cylinder, and a return that biases the torque receiving rod. A spring; a polishing portion attached to an end of the torque receiving rod; and a guide mechanism for restricting movement of the torque receiving rod in the axial direction. The guide mechanism includes a groove extending in the axial direction on the outer peripheral surface of the torque receiving rod, and a pin that is rotatably attached to the cylinder and fits into the groove.

  Furthermore, it is preferable that the guide mechanism includes a bearing that rotatably supports the pin on the cylinder.

  According to the present invention, in the tread cleaning device, since the pins of the guide mechanism are rotatably attached, wear of the pins and grooves of the guide mechanism is reduced. Further, the service life of the guide mechanism is extended, and the number of times the guide mechanism is replaced in the tread cleaning device is reduced.

It is a side view of a tread cleaning device. It is a partial cross section figure of a tread cleaning device. It is a figure explaining operation | movement of a guide mechanism.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a side view of the tread cleaning device according to the embodiment. FIG. 2 is a partial cross-sectional view taken along the cylinder axis (II-II direction in FIG. 1) of the tread cleaning device according to the embodiment.

  As shown in FIG. 1, the wheel tread cleaning device according to the present embodiment is attached to a carriage of a railway vehicle via a bracket 36, and is polished by bringing the polishing portion 3 into sliding contact with the wheel tread to be on the outer surface of the tread. Remove adhering dust and gravel and clean.

  As shown in FIG. 2, the tread cleaning device includes a cylinder 1, a torque receiving rod 2, a polishing unit 3, a return spring 4, and a guide mechanism 20. The horizontal cylinder 1 is coupled to a bracket 36 as shown in FIG. The piston rod type torque receiving rod 2 is slidably inserted into the cylinder 1 through a seal 16. The torque receiving rod 2 is always guided and slid in the horizontal direction in the cylinder 1, and the tangential force of the wheel received from the polishing portion 3 is carried by the cylinder 1 via the torque receiving rod 2. The cylinder 1 has a wear-resistant liner portion 1b in order to smoothly reciprocate while maintaining airtightness with the torque receiving rod 2. The torque receiving rod 2 has a lid portion 2a and an outer end flange 2b at one end on the polishing portion 3 side. A boot 14 is attached between the base end 1a of the cylinder 1 and the outer end flange 2b of the torque receiving rod 2 to prevent dust from entering.

  The polishing section 3 includes an abrasive receiver 3a that is detachably coupled to the outer end flange 2b of the torque receiving rod 2, and an abrasive 3b that is detachably attached to the end of the abrasive receiver 3a. The saddle curved surface 3c of the abrasive 3b is in sliding contact with the tread surface of the wheel.

  The cap (lid) 6 is coupled to the rear end portion of the cylinder 1 via an O-ring or the like. The cap 6 is formed hollow, and a connector 30 for supplying air pressure as a kind of fluid pressure is attached. Note that hydraulic pressure can also be used as the fluid pressure.

  The support rod 5 is attached to a cap 6 provided in the cylinder 1 and extends through the torque receiving rod 2. The torque receiving rod 2 is formed hollow. The return spring 4 is interposed between the seat 24 provided on the inner periphery of the torque receiving rod 2 and the seat 10 provided at the end of the support rod 5. The return spring 4 biases the torque receiving rod 2 in a direction in which the torque receiving rod 2 is pulled into the cylinder 1.

  The air pressure supplied from the connector 30 acts on the end face of the torque receiving rod 2 and the end of the return spring 4 through the cap 6 to push the torque receiving rod 2 out of the cylinder 1 while compressing the return spring 4 in the wheel direction. To stretch. When the torque receiving rod 2 extends, the polishing portion 3 moves, and the curved surface 3c of the polishing portion 3 comes into sliding contact with the tread surface of the rotating wheel that is running. When the removal of dust and the like by the polishing unit 3 is completed and the supply of air pressure is stopped, the torque receiving rod 2 is moved back together with the torque receiving rod 2 and the polishing unit 3 by the restoring force of the return spring 4 to the original position ( Return to the position before supplying air pressure.

  The guide mechanism 20 restricts the movement of the torque receiving rod 2 in the axial direction, thereby preventing the torque receiving rod 2 and the polishing section 3 from rotating around the axial direction. The guide mechanism 20 includes an axial groove 37 that extends in the rod axial direction on the outer peripheral surface of the torque receiving rod 2, and a pin 12 that is rotatably attached to the cylinder 1 and fits in the axial groove 37. In the present embodiment, the pin 12 is a columnar member having a cylindrical shape. The pin 12 is attached to the cylinder 1 via a bearing 13, and the bearing 13 supports the pin 12 so as to be rotatable with respect to the cylinder 1. In the present embodiment, a needle bearing having a plurality of cylindrical needles (needle portions) 13a is preferable as the bearing 13, but a ball bearing, a plain bearing, or the like can also be used as another bearing. The pin 12 and the bearing 13 are integrated with a bolt 25 that can be screwed into the cylinder 1, and can be attached to and detached from the cylinder 1 and easily exchanged.

  The torque receiving rod 2 includes an outer peripheral groove 38 on the outer periphery. In the outer circumferential groove 38 of the torque receiving rod 2, a latch receiver 8 having a large number of sawtooth grooves on the outer circumference is inserted so as to be movable in the axial direction of the torque receiving rod 2 (or the axial direction of the cylinder 1). ing. The tip of the latch 7 is selectively engaged with one of the toothed grooves.

  The rod-shaped latch 7 is provided in the cylinder 1 and selectively engages with the latch receiver 8. In the cylinder 1, a guide cylinder 39 rises in the diametrical direction, and is inserted in the center of the guide cylinder 39 so that the latch 7 can move. The latch 7 is normally pushed by a spring 19 and its tip engages with the latch receiver 8. When the outer end of the latch 7 is pulled out against the spring 19 with a finger, the engagement with the latch receiver 8 is released and the latch receiver 8 moves.

  The latch receiver 8 regulates the reverse stroke of the torque receiving rod 2. For example, when the saddle curved surface 3c of the polishing section 3 is worn, the torque receiving rod 2 and the latch receiver 8 are pushed out by a distance corresponding to the worn thickness. The latch receiver 8 regulates the position of the torque receiving rod 2 according to the amount pushed out so that the torque receiving rod 2 does not move backward. As a result, even if the polishing portion 3 is worn, the distance between the polishing portion 3 and the tread surface of the wheel can always be kept within a certain range.

  Next, the effect of this embodiment will be described. According to the present embodiment, the tread cleaning device has the guide mechanism 20 that limits the movement of the torque receiving rod 2 in the axial direction. The guide mechanism 20 includes a groove 37 that extends in the axial direction on the outer peripheral surface of the torque receiving rod 2, and a pin 12 that is rotatably attached to the cylinder 1 and fits into the groove 37. Thereby, even when the torque receiving rod 2 repeatedly reciprocates by repeatedly supplying and stopping air pressure, wear of the pin 12 or the groove 37 of the guide mechanism 20 can be prevented. Further, the movement of the torque receiving rod 2 is preferably limited in the axial direction, the rotation of the polishing portion is prevented, and the good cleaning operation of the tread cleaning device is maintained. Moreover, the rail vehicle provided with this tread cleaning device is suitably cleaned of the tread of the wheel.

  For example, as shown in FIG. 3, when the friction coefficient of one wall surface 37 a of the groove 37 is larger than the friction coefficient of the other wall surface 37 b at a certain position in the length direction of the groove 37, the torque receiving rod 2 with respect to the pin 12. Even if (as a result, the wall surface 37a of the groove 37) moves, the pin 12 rotates, so that wear of the pin 12 by the wall surface 37a having a large friction coefficient can be prevented. On the contrary, when the friction coefficient of one wall surface 37a of the groove 37 is smaller than the friction coefficient of the other wall surface 37b at a certain position in the length direction of the groove 37, the torque receiving rod 2 (and hence the groove 37) Even if the wall surface 37b) moves, the pin 12 rotates in the direction opposite to that shown in FIG. 3, so that the wear of the pin 12 by the wall surface 37b having a large friction coefficient can be prevented.

  The guide mechanism 20 may include a bearing 13 that supports the pin 12 so as to be rotatable with respect to the cylinder 1. The pin 12 can be easily rotated by the bearing 13.

  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.

DESCRIPTION OF SYMBOLS 1 Cylinder 2 Torque receiving rod 3 Polishing part 4 Return spring 12 Pin 13 Bearing 20 Guide mechanism 37 Groove

Claims (2)

A cylinder,
A torque receiving rod that is slidably inserted into the cylinder and is movable by fluid pressure introduced into the cylinder;
A return spring for urging the torque receiving rod;
A polishing portion attached to an end of the torque receiving rod;
A guide mechanism for limiting the movement of the torque receiving rod in the axial direction,
The wheel tread cleaning device according to claim 1, wherein the guide mechanism includes a groove extending in an axial direction on an outer peripheral surface of the torque receiving rod, and a pin that is rotatably attached to the cylinder and fits into the groove. .   The tread cleaning device according to claim 1, wherein the guide mechanism includes a bearing that rotatably supports the pin with respect to the cylinder.

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