JP2005096628A - Towed-type railroad facility vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve maintainability and heat radiation of braking devices. <P>SOLUTION: A railroad facility vehicle is equipped with a truck 3, an iron wheel set 4 rotatably supported under the truck 3, iron wheels 5 mounted to the iron wheel set 4, and the brake caliper devices 20 for braking on the rotation of the iron wheel set 4. The brake caliper devices 20 are arranged on the outer end part sides in the longitudinal direction of the iron wheel set 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a towed railway facility vehicle including a braking device that brakes rotation of an iron wheel shaft that is rotatably supported below a carriage.

  2. Description of the Related Art Conventionally, as a braking device used in a railway facility vehicle, a disc that obtains a braking force by attaching a friction disk (disk) to an axle and sandwiching the friction disk with a frictional member made of a friction material provided on the carriage side Many brakes are used, and among them, a caliper type braking device is increasingly used. For example, as disclosed in Patent Document 1, this caliper type braking device is provided with a caliper body straddling a disc attached to an axle on the carriage side, and a hydraulically driven piston on the caliper body and the piston. Is provided with a brake member (pad) that is biased toward the disk, and the disk is pressed by the two brakes that are opposed to each other by the two pistons to obtain a braking force.

  On the other hand, although it is different from a railroad facility vehicle, a caliper type disc brake as shown in FIG. 5 is also used in a dump truck or the like. The disc brake 50 includes a brake disc 53 that is bolted to a wheel hub 52 that rotates about an axle 51, and a brake pad (pad) 54 that is fixed to the non-rotating axle 51 and is pressed from both sides of the brake disc 53. And a caliper 55 for braking the brake disc 53. Thus, the brake disc 54 that rotates about the axle 51 is sandwiched between the pair of brake members 54 that are opposed to each other when the brake member 54 is pressed in the direction toward the brake disc 53 by hydraulic pressure or air pressure. Is converted into frictional heat between the control wheel 54 and the brake disc 53, and the vehicle can be braked.

JP 2002-349614 A

  By the way, since the above-mentioned land work vehicles such as dump trucks often work on rough terrain and the like, there is a possibility that the periphery of the tire 56 may be covered with roadbed material and mud, and also hit an obstacle. There are many opportunities. For this reason, the disc brake 50 is usually disposed in the inner space of the tire 56 so as to protect them from mud or obstacles.

  On the other hand, in a railway vehicle as disclosed in Patent Document 1, there is almost no problem that foreign matter scattered from the road surface hits a wheel unlike a land work vehicle. Nevertheless, the conventional braking device including the brake caliper device described in Patent Document 1 has a structure arranged in the inner space of the wheel.

  However, when the braking device is arranged in the inner space of the wheel in this way, there is a difficulty in terms of maintainability such as replacement of consumable parts of the braking device. In addition, since auxiliary equipment and the like are usually provided at the lower part of the vehicle body and ventilation is poor, there is a difficulty in terms of heat dissipation of the brake disc when the vehicle is running.

  The present invention has been made in view of the above-described problems, and facilitates access from the outside to the braking device to improve its maintainability. The braking device can be used directly when the vehicle is traveling. It is an object of the present invention to provide a towed railway facility vehicle that can improve heat dissipation by touching outside air.

To achieve the above object, a towed railway facility vehicle according to the present invention provides:
A towed railway facility vehicle comprising a carriage, an iron wheel shaft rotatably supported below the carriage, an iron wheel attached to the iron wheel shaft, and a braking device that brakes rotation of the iron wheel shaft,
The braking device is arranged on the outer end side in the longitudinal direction of the steel wheel shaft (first invention).

  In the first invention, it is preferable that the braking device is provided on both ends of the iron wheel shaft (second invention).

  Moreover, it is preferable that a crane is attached to the cart (third invention).

  According to the first aspect of the present invention, the braking device disposed below the carriage in the towed railway facility vehicle is disposed on the outer end side in the longitudinal direction of the iron wheel shaft and is opened to the outside of the vehicle. Therefore, when an operator performs maintenance work such as replacement of consumable parts of the braking device, the work can be easily performed. In addition, there is no auxiliary equipment or the like on the outer end side in the longitudinal direction of the steel wheel shaft, and it is not difficult for the braking device to come into contact with the outside air due to the auxiliary equipment or the like when the vehicle is running. The air permeability and heat dissipation of the braking device can be improved, and the friction surface can be prevented from seizing due to the air cooling effect.

  Further, by adopting the configuration of the second invention, even when the braking device is arranged on the outer end side in the longitudinal direction of the steel wheel shaft, the capacity per set of the braking device can be reduced, Since it does not protrude greatly to one side, it becomes possible to easily arrange these braking devices within the limits of the railway vehicle.

  Further, by adopting the configuration of the third invention, a crane used for work such as rail transportation can be used for exchanging consumable parts of the braking device, and the maintainability of the braking device can be improved. Further improvement can be achieved.

  Next, specific embodiments of the towed railway facility vehicle according to the present invention will be described with reference to the drawings.

  FIG. 1 is a front view of a towed railway facility vehicle according to an embodiment of the present invention, and FIG. 2 is a side view of the towed railroad facility vehicle (90 jib from the state of FIG. 1). The imaginary diagram shows a state in which the rotary table is rotated by 90 ° and the jib is rotated in the solid line direction). This embodiment shows an example applied to a rail transport vehicle used for transporting a rail to the replacement position at the time of rail replacement.

  The rail transport vehicle 1 of the present embodiment includes a carriage (base frame) 3 that travels along the rail 2, an iron wheel shaft (axle) 4 that is rotatably supported at the front and rear of the carriage 3, and the iron wheel shaft. 4 are provided with iron wheels (wheels) 5 attached to both ends of the motor. A pin connector 6 is provided at each of the front end surface central portion and the rear end surface central portion of the carriage 3, and rail clamp devices 7 (see FIG. 1 is omitted). The rail clamp device 7 serves to hold the carriage 3 in a fixed position by clamping the rail 2 during work. When the carriage 3 travels, the rail clamp device 7 is substantially omitted from the work position (position shown in FIG. 2). It is held in the retracted position rotated 90 ° upward.

  A rotary table 8 is provided on the carriage 3, and a support column 9 is erected on the periphery of the rotary table 8. Further, a drive / stop mechanism (not shown) is provided between the rotary table 8 and the carriage 3, and the rotary table 8 is rotated in the horizontal plane with respect to the carriage 3 by the drive / stop mechanism. It can be stopped and fixed with. The cart 3 is held in a retracted position (position indicated by an imaginary line in FIG. 2) obtained by rotating the rotary table 8 by 90 ° from an operation position (position indicated by a solid line in FIG. 2) during empty traveling. Is done.

  A jib 10 made of I-shaped steel is provided on the upper portion of the column 9 in a direction perpendicular to the column 9. The jib 10 has a base end portion connected to a bracket 11 provided on the upper portion of the column 9 via a pin 12. Further, an upper bracket 13 is provided at the upper end portion of the support column 9, and the distal end portion of the stay 14 whose base end portion is rotatably provided on the upper bracket 13 is connected to the distal end portion of the jib 10, The jib 10 is always kept in a substantially horizontal state. In addition, a turnbuckle type cant correction mechanism 15 is arranged at the intermediate portion of the stay 14 so that the inclination angle of the jib 10 can be corrected.

  An electric chain block 16 is held on the jib 10 so as to be movable in the longitudinal direction. A rail holder 18 is suspended from the tip of the hook 17 of the electric chain block 16, and the rail R mounted on the rail mounting portion 19 on the rotary table 8 is held by the rail holder 18. It is configured to hang.

  On the other hand, a braking device (hereinafter referred to as “brake caliper device”) 20 for braking the steel wheel shaft 4 is provided on both lower sides of the carriage 3. Hereinafter, the brake caliper device 20 will be described with reference to FIGS. 3 and 4.

  The brake caliper device 20 is attached to a brake disc 21 attached to both ends in the longitudinal direction of the steel wheel shaft 4 (only one end side is shown in FIGS. 3 and 4), and is opposed to the brake disc 21. And a caliper body 24 attached to a bracket 23 attached to the attachment surface 22 of the carriage 3. Here, the caliper body 24 is provided so as to straddle the brake disc 21, as is apparent from FIG.

  The caliper body 24 includes a restrictor (pad) 25 formed in a U shape in plan view so as to sandwich the brake disc 21, and each of the restrictors 25 is disposed on the back side of a piston (whichever Further, a braking force is obtained by a frictional force between the brake discs 21 and the respective brake members 25 by being pressed against the surface of the brake discs 21 in the axial direction by hydraulic drive (not shown).

  In FIG. 1, reference numeral 26 indicates a railway vehicle limit line, and reference numeral 27 indicates a railway construction limit line.

  In the rail transport vehicle 1 of the present embodiment, no pressure oil is introduced into the cylinder portion of the caliper body 24 during operation, and no pressing force is acting on the control wheel 25. When braking is performed from this operating state, when a braking start command is issued to the hydraulic pressure supply system, pressure oil is introduced into the cylinder portion and the piston is pressed in a direction toward the brake disc 21. As a result, the brake disc 21 that rotates together with the iron wheel shaft 4 is sandwiched from both sides by the control device 25, and the kinetic energy of the vehicle is converted into frictional heat between the control device 25 and the brake disc 21 to perform braking. it can. After this braking, the rail clamp device 7 is rotated from the retracted position to the working position to clamp the rail 2, and in the holding state of the carriage 3, the rail R with respect to the rail mounting portion 19 using the electric chain block 16 is used. Loading and unloading work.

  According to the rail transport vehicle 1 of the present embodiment, the brake caliper device 20 provided below the carriage 3 is disposed outside both ends in the longitudinal direction of the steel wheel shaft 4 and is opened to the outside of the vehicle. Therefore, when an operator performs maintenance work such as replacement of consumable parts, the work can be easily performed. In addition, since auxiliary equipment or the like is not disposed at the outer end of the carriage 3, the auxiliary equipment or the like does not get in the way when the vehicle travels, and the braking device is not easily exposed to the outside air. Therefore, compared with the case where the brake caliper device 20 is arranged on the inner side of the steel wheel shaft 4, the ventilation property is improved, the heat dissipation of the brake caliper device 20 is improved, and the friction surface is prevented from seizing due to the air cooling effect. Can contribute.

  In the present embodiment, since the brake caliper device 20 is disposed at both ends of the iron wheel shaft 4, the capacity per set of the brake caliper device 20 can be reduced as compared with the case where the brake caliper device 20 is disposed only on one side. Can do. Therefore, there is an advantage that each brake caliper device 20 can be easily arranged in the railway vehicle limit line 26.

  Further, by applying the brake caliper device 20 of the present embodiment to the rail transport vehicle 1, a consumable part during maintenance of the brake caliper device 20 can be used for the crane (electric chain block 16) attached to the rail transport vehicle 1. Since it can be used for exchange and the like, its maintainability can be further improved.

  In this embodiment, the example applied to the rail transport vehicle has been described, but it goes without saying that the present invention can also be applied to other towed railway facility vehicles.

1 is a front view of a towed railway facility vehicle according to an embodiment of the present invention. Side view of the towed railway facility vehicle of this embodiment The enlarged front view around the mounting part of the braking device in this embodiment Enlarged plan view around the mounting portion of the braking device in the present embodiment The figure which shows the example of the caliper system disk brake which is installed in the dump truck

Explanation of symbols

1 rail carrier vehicle, 2 rails, 3 bogies, 4 iron wheel shafts, 5 iron wheels, 16 electric chain block, 20 brake caliper device, 21 brake disc, 24 caliper body, 25 wheel control

Claims (3)

A bogie (3), an iron wheel shaft (4) rotatably supported below the bogie (3), an iron wheel (5) attached to the iron wheel shaft (4), and the rotation of the iron wheel shaft (4) A towed railway facility vehicle comprising a braking device (20) for braking the vehicle,
A towed railway facility vehicle characterized in that the braking device (20) is arranged on the outer end side in the longitudinal direction of the steel wheel shaft (4).   The towed railway facility vehicle according to claim 1, wherein the braking device (20) is provided on both ends of the iron wheel shaft (4).   The towed railway facility vehicle according to claim 1 or 2, wherein a crane (16) is attached to the carriage (3).

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