JPH0578662U - Railcar braking system - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a braking device 4 that directly obtains a large frictional resistance between a rail car 1 and a rail 8. [Structure] The braking device 4 mounted between the rail car 1 and the rail 8 has a structure in which the braking piece 6 is in surface contact with the tread 9 of the rail 8. The friction material 5 of the braking piece 6 and the tread 9 are brought into direct pressure contact to frictionally brake.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a braking device for a rail car that cooperates with a rail.

[0002]

[Prior Art]

 FIG. 3 is a partial explanatory view of a conventional braking apparatus for a rail car. A conventional braking device is a device that brakes wheels 3 suspended from a truck 2 of a rail car 1. As shown in FIG. 3, the pair of braking devices actuates the arm 12 whose one end is supported by the carriage 2 by the actuating device 13, and interlocks with the arm 12 to press the brake shoe 11 against the wheel 3. When the braking device is operated, the pair of brake shoes 11 sandwich the wheel 3 and the rotation of the wheel 3 is stopped by the frictional force. At the same time, the wheel 3 stops the rail car 1 due to the frictional force between the treads 9 of the rails 8. A device for performing such two-stage friction braking is provided. However, in the braking device described above, although the braking force of the wheel 3 is present, only the frictional resistance of the line contact is present between the wheel 3 and the rail 8, and the braking force of the rail car 1 as a whole is weak.

In addition to conventional braking devices for rail cars, there are dynamic braking and electromagnetic braking, and various improvements have been made to improve the performance. Currently, the braking force of the vehicle is only the frictional resistance of the line contact, and the braking force of the entire vehicle has not improved at all.

[0004]

[Problems to be solved by the device]

 The problem to be solved is that the braking force of the conventional braking device is weak and the rail car 1 is stopped by the friction of the line contact between the wheel 3 and the rail 8. The present invention solves the above-mentioned problems of the prior art, and provides a braking device capable of obtaining a large frictional resistance in the surface contact with braking of a rail car.

[0005]

[Means and Actions for Solving the Problems] A braking device fixed to a bogie of a rail car has a braking piece having a friction material facing a tread surface of a rail, and the braking piece supported by the bogie so as to extend and contract. Providing a braking device that has a support arm and an actuator that pressurizes the braking piece, and pressurizes the friction material of the braking device against the tread surface of the rail to obtain a large frictional resistance of the surface contact when braking the rail car. Realized the purpose to.

[0006]

【Example】

 FIG. 1 is an explanatory view of a braking apparatus for a rail car according to an embodiment of the present invention. FIG. 2 is a partial perspective view of a braking piece according to an embodiment of the present invention. The trolley 2 of the rail car 1 includes wheels 3 that rotate on the tread 9 of the rail 8, and a braking device 4 that is fixed between the trolley 2 and the rail 8 so as to face the tread 9 of the rail 8. The braking device 4 includes a braking piece 6 on which a friction material 5 is mounted and a guide ridge 6A is projected, a support arm 10 for supporting the braking piece 6 on the carriage 2, and an actuator 7 for operating the braking piece 6. Composed of. The pair of supporting arms 10 are attached with the upper end inclined to the dolly 2 so as to form an inverted trapezoid with the dolly 2 and the braking piece 6, and with the lower end inclined to the braking piece 6. The support arm 10 is extendable in the axial direction, and at the same time has a built-in compression spring, a tension spring, an air damper, etc. so as to have a strong resistance to the axial compression force. The upper and lower ends of the supporting arm 10 have a slight degree of freedom in the turning direction with the carriage 2 and the control piece 6, respectively. The actuator 10 comprises a pneumatic or hydraulic cylinder and a piston. The upper and lower ends of the actuator 10 can also rotate with the carriage 2 and the braking piece 6.

When compressed air or hydraulic pressure is supplied to the actuator 7, the braking piece 6 is pressed against the tread 9 of the rail 8. Then, the friction material 5 of the braking piece 6 comes into pressure contact with the tread 9 to obtain a large frictional resistance of surface contact. Since the frictional resistance is transmitted to the truck 2 via the supporting arm 10, the truck 2 receives a large braking force on the track 8 and stops.

[0008]

[Effect of the device]

 As described above, in the present invention, the braking device does not stop the wheels by sandwiching the wheels, but the braking piece of the braking device is brought into pressure contact with the rail, so that a large friction resistance of surface contact can be obtained. It has the effect of stopping the entire track vehicle safely and quickly.

[Brief description of drawings]

FIG. 1 is an explanatory view of a braking device for a rail car according to an embodiment of the present invention.

FIG. 2 is a partial perspective view of a braking piece according to an embodiment of the present invention.

FIG. 3 is a partial explanatory view of a conventional railcar braking device.

[Explanation of symbols]

1 ... Rail car, 2 ... Bogie, 3 ... Wheels, 4 ... Braking device, 5 ...
Friction material, 6 ... Braking piece, 6A ... Guide ridge, 7 ... Actuator, 8
… Rails, 9… Treads, 10… Support arms, 11… Braces, 12…
Arm, 13 ... Actuator.

Claims (1)

[Scope of utility model registration request] 1. A braking device (4) fixed to a carriage (2) of a rail car (1) comprises a braking piece (6) having a friction material (5) facing a tread (9) of a rail (8). ), A support arm (10) for supporting the braking piece (6) on the carriage (2) in an extendable manner, and an actuator (7) for pressurizing the braking piece (6). A braking device (4) for a rail car (1), characterized in that a friction material (5) is brought into pressure contact with a tread (9) of a rail (8).