JPH0577766U - Railway vehicle rotation detection device - Google Patents

Abstract

(57) [Abstract] [Purpose] To detect the wheel rotation speed of a railroad vehicle and introduce an ABS device to brake the railroad vehicle to prevent the occurrence of tire flats on the wheels during sudden braking. [Structure] A pulsar ring 3 is integrally provided on an outer peripheral surface of a tightening member 9 that rotates integrally with an axle 2 inside an axle bearing 1 for a railway vehicle, and an ABS is provided on a cover member 14 that is a fixed portion.
The rotation detection sensor 4 for the device is attached so that its tip 4a faces the outer peripheral surface of the pulsar ring 3, and the ABS device is controlled by detecting the rotation speed of the wheel during braking of the vehicle to prevent the wheel from being locked during braking. To prevent the tire tread from forming on the wheel tread.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotation detecting device for a railway vehicle, and more specifically, a rotation detecting device for detecting the number of rotations of wheels so that an antilock brake system (hereinafter referred to as an ABS device) can be introduced to brake a railway vehicle. The present invention relates to a detection device.

[0002]

[Prior Art]

 In a railway vehicle, if the vehicle is suddenly braked during traveling, the wheels may be locked before the vehicle body stops. As shown in FIG. 3, the wheels 21 are locked so that the treads of the wheels 21 and the rails 22 are locked. A slip occurs on the surface, and the tread of the vehicle wheel 21 is partially worn by the slip, resulting in an open circle. This missing circle surface is generally called a tire flat 23.

[0003]

[Problems to be solved by the device]

 As described above, when the tire flat 23 is formed on the tread surface of the wheel 21, when the vehicle is running, the tire flat serves as a vibration source to increase the vibration of the vehicle body and adversely affect the axle bearing.

The tire flat as described above is currently supported by a correction process in which the wheels are inspected at a certain fixed time (constant inspection) and the tread surface is ground to remove the tire flat. There is a problem in that not only is it costly but also the service life of the wheels is shortened.

In view of this, the present invention makes it possible to introduce an ABS device for braking a railway vehicle by detecting the number of rotations of a wheel, eliminate the wheel lock during sudden braking, and prevent the occurrence of a tire flat. An object of the present invention is to provide a rotation detecting device for a railway vehicle that can be used.

[0006]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides a pulser ring around a member that rotates integrally with an axle inside an axle bearing, and a sensor is provided at a fixed portion of the bearing so that the tip of the sensor faces the pulser ring. This is the structure that is attached to.

[0007]

[Action]

 The pulsar ring is fixed to the member that rotates together with the axle inside the axle bearing of the railway vehicle, and the sensor is attached to the fixed part of the bearing. During braking, the ABS device is controlled by detecting the number of rotations to prevent wheel lock.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the rotation detecting device is provided with a pulsar ring 3 around a member that rotates integrally with an axle 2 inside an axle bearing 1 of a railway vehicle, and a fixed portion of the bearing 1 is provided. A rotation detection sensor 4 for the ABS device is attached to the pulsar ring 3 so that its tip 4a faces the pulsar ring 3.

In the illustrated case, the axle bearing 1 includes a spacer 5 and inner rings 6 and 6a press-fitted on both sides of the spacer 5 at a position near the end of the axle 2 to form an inner ring 6 and 6a and an outer ring 7 located outside thereof. A large number of tapered rollers 8 and 8a are incorporated between the two, and cylindrical fastening members 9 and 9a are externally fitted to the axle 2 at positions on the outer end sides of both inner rings 6 and 6a. An annular seat 11 for receiving the end of the tightening member 9a is externally fitted to the position of the step 10 provided close to the end of the axle 2 and fixed between the end cover 13 and the seat 11 by a bolt 12. Thus, the spacer 5, the inner rings 6 and 6a, and the fastening members 9 and 9a are fastened and fixed in the axial direction.

At both ends of the outer ring 7, cover members 14, 14a covering the outer peripheries of the fastening members 9, 9a are fixed, and inside the cover members 14, 14a, the space between the fastening members 9, 9a is fixed. Sealing members 15 and 15a which are hermetically sealed and seal the lubricating oil filled between the inner rings 6 and 6a and the outer ring 7 are incorporated.

In the axle bearing 1 as described above, it is the spacer 5, the inner rings 6 and 6a, the fastening members 9 and 9a and the end cover 13 that rotate integrally with the axle 2 and are supported by the axle box. The outer ring 7 and the cover members 14 and 14a fixed to the outer ring 7 are fixed parts that do not rotate.

The pulsar ring 3 is attached to the rotating portion of the axle bearing 1, and the sensor 4 is attached to the fixed portion.

In the first embodiment shown in FIG. 1, a gear-shaped pulsar ring 3 is integrally provided on the outer peripheral surface of a tightening member 9 located on the end side of the axle 2, and a sensor 4 is attached to a cover member 14. The pulsar ring 3 is mounted so that its tip 4a faces the outer peripheral surface of the pulsar ring 3.

In the second embodiment shown in FIG. 2, a gear-shaped pulsar ring 3 is integrally provided on the outer periphery of the spacer 5, and a sensor 4 is provided at the center of the outer ring 7 with its tip 4 a located outside the pulsar ring 3. It is fixed so as to face the peripheral surface.

In any of the embodiments, the pulsar ring 3 formed separately from the tightening member 9 or the spacer 5 may be fixed to the pulsar ring 3, and the pulsar ring 3 and the sensor. 4 is compact and easy to install inside the current axle bearings for railway vehicles.

The rotation detecting device of the present invention has the above-mentioned configuration, and the ABS device is adopted as the braking device of the railway vehicle, and the pulsar ring 3 that rotates integrally with the axle 2 and the pulsar ring 3 face each other. The number of rotations of the wheel detected by the sensor 4 fixed as described above is input to the ABS device to control the braking of the wheel.

That is, when sudden braking is applied while the railway vehicle is running, when the wheels are about to lock, the brakes on the wheels are decompressed to prevent the wheels from locking, and the possibility of locking the wheels disappears. The control to increase the pressure of the brake is performed to prevent the occurrence of tire flatness due to wheel locking.

[0019]

【effect】

 As described above, according to the present invention, since the pulsar ring and the sensor are provided on the railroad axle bearing, it is possible to introduce the ABS device to the braking of the railway vehicle by detecting the rotation speed of the wheel during braking. It is possible to prevent the wheels from locking during sudden braking and to prevent tire flats from forming on the treads of the wheels.

Further, since it is possible to prevent the tire flatness of the wheel, it is possible to reduce the cost required for the correction processing of the wheel and extend the service life of the wheel.

[Brief description of drawings]

1 is a longitudinal sectional view showing a first embodiment of a rotation detecting device according to the present invention.

FIG. 2 is a vertical sectional view showing a second embodiment of the same.

FIG. 3 is an explanatory view when a tire flat occurs on a wheel.

[Explanation of symbols]

 1 Axle bearing 2 Axle 3 Pulsar ring 4 Sensor 5 Spacer 9 Tightening member

Claims (1)

[Scope of utility model registration request] 1. A rotation detecting device for a railway vehicle in which a pulser ring is provided around a member that rotates integrally with an axle inside an axle bearing, and a sensor is attached to a fixed portion of the bearing so that a tip of the sensor faces the pulser ring. .