Combination device of shaft end grounding device and velometer of metro vehicle

Abstract

The utility model discloses a subway vehicle shaft end grounding device and velometer combined device which comprises a shaft end box cover, the shaft end box cover is located at the end of an axle, a carbon brush support is fixed to the shaft end box cover, a grounding carbon brush makes contact with the axle through a compression spring, static charges are removed through a grounding wire, a speed measuring gear rotates along with the axle, and a speed measuring sensor is matched with the shaft end box cover to detect the rotating speed. The signal processing module processes the signal and transmits the signal to a vehicle control system. The device is integrally designed, the structure is simplified, the space is saved, and the running safety and stability of the vehicle are improved.

Description

Technical Field

[0001] This utility model relates to the field of rail transit technology, specifically a combination device of axle end grounding device and speed measuring device for subway vehicles. Background Technology

[0002] Two crucial safety requirements exist during subway vehicle operation. Firstly, due to friction between the wheels and rails and the continuous operation of electrical equipment, static electricity easily accumulates on the vehicle body. If this static charge is not effectively discharged in a timely manner, it may damage the vehicle's electrical equipment and pose a potential threat to passenger safety. Therefore, grounding devices are typically installed at the axle ends to ensure safe vehicle operation. Secondly, monitoring the subway vehicle's operating speed is a critical aspect of ensuring safe operation. Accurately and in real-time obtaining vehicle speed information ensures that the train operates within the prescribed speed range, avoiding safety hazards caused by speeding or underspeeding. Speed ​​measuring devices are essential equipment used for real-time monitoring of vehicle speed.

[0003] However, traditionally, the grounding device and speed measuring device on the axle end of subway vehicles are often installed separately. This installation method has many drawbacks, such as occupying a large space, making the layout of the vehicle axle end less compact; the installation and maintenance process is more complex, increasing manpower and time costs; and separate installation may also lead to signal interference or measurement errors, thereby affecting the stability and safety of vehicle operation. Therefore, designing a device that combines the grounding device and speed measuring device is of great practical significance. Utility Model Content

[0004] In view of the problems existing in the prior art, this utility model provides a combination device of axle end grounding device and speed measuring device for subway vehicles, including: an axle end cover, which is set at the end of the axle, a bearing is installed on the axle, a carbon brush bracket is fixed on the axle end cover, one end of the grounding carbon brush is connected to the carbon brush bracket, and the other end is in contact with the axle through a compression spring, and a grounding wire is connected to the grounding carbon brush and used to conduct static charge to the ground; a speed measuring gear is installed on the axle, a speed measuring sensor is installed on the carbon brush bracket and cooperates with the speed measuring gear to detect the axle speed, and a signal processing module is installed on the carbon brush bracket to process the signal of the speed measuring sensor and transmit the speed signal to the vehicle control system wirelessly or wiredly.

[0005] As a preferred embodiment of this utility model, the carbon brush bracket is made of insulating material to prevent electrical interference between the grounding device and the speedometer.

[0006] As a preferred embodiment of this utility model, the speed sensor is a non-contact sensor.

[0007] As a preferred embodiment of this utility model, the non-contact sensor is a Hall sensor to ensure the accuracy and reliability of speed measurement.

[0008] As a preferred embodiment of this utility model, the contact surface between the grounding carbon brush and the axle is made of copper-containing graphite composite material to extend the service life of the grounding carbon brush and reduce the maintenance frequency.

[0009] As a preferred embodiment of this utility model, the signal processing module is integrated inside the carbon brush bracket, which reduces external wiring and improves the compactness and anti-interference capability of the device.

[0010] By adopting the above technical solution, this utility model has the following beneficial effects:

[0011] 1. Integrated design: This utility model integrates the grounding device and the speed measuring device together, which simplifies the installation structure, reduces the space occupied, and facilitates maintenance and repair;

[0012] 2. Strong anti-interference capability: By using insulating materials and integrated signal processing modules, electrical interference is effectively reduced, improving the measurement accuracy and stability of the speed measuring device;

[0013] 3. High reliability: The application of non-contact sensors and the use of wear-resistant materials improve the reliability and service life of the device and reduce the failure rate;

[0014] 4. Enhanced safety: By monitoring vehicle speed in real time and effectively removing static charge, the safety and stability of subway vehicle operation are ensured. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] In the diagram: 1. Axle; 2. Axle end cover; 3. Carbon brush bracket; 4. Grounding carbon brush; 5. Compression spring; 6. Grounding wire; 7. Bearing; 8. Speed ​​measuring gear; 9. Speed ​​sensor; 10. Signal processing module. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Example 1

[0019] like Figure 1As shown, a specific embodiment of the combined device of a subway vehicle axle end grounding device and speed measuring device of the present invention includes: an axle end cover 2, which is disposed at the end of the axle 1; a bearing 7 is mounted on the axle 1; a carbon brush bracket 3 is fixed on the axle end cover 2; one end of a grounding carbon brush 4 is connected to the carbon brush bracket 3, and the other end is in contact with the axle 1 through a compression spring 5; a grounding wire 6 is connected to the grounding carbon brush 4 and is used to conduct static charge to the ground; a speed measuring gear 8 is mounted on the axle 1; a speed measuring sensor 9 is mounted on the carbon brush bracket 3 and cooperates with the speed measuring gear 8 to detect the rotational speed of the axle 1; a signal processing module 10 is installed on the carbon brush bracket 3, which is integrated inside the carbon brush bracket 3, reducing external wiring and improving the compactness and anti-interference ability of the device; the signal processing module 10 is used to process the signal of the speed measuring sensor 9 and transmit the speed signal to the vehicle control system wirelessly or via wired means.

[0020] The carbon brush holder 3 is made of insulating material. In this embodiment, it is made of alumina ceramic to prevent electrical interference between the grounding device and the speedometer.

[0021] The speed sensor 9 is a non-contact sensor; in this embodiment, a Hall sensor is used to ensure the accuracy and reliability of the speed measurement.

[0022] The contact surface between the grounding carbon brush 4 and the axle 1 is made of wear-resistant material. In this embodiment, a copper-containing graphite composite material is used to extend the service life of the grounding carbon brush 4 and reduce the maintenance frequency.

[0023] The working principle of this utility model:

[0024] When the vehicle is running, the rotation of the axle 1 drives the speed measuring gear 8 to rotate. The speed measuring sensor 9 detects the rotation signal of the speed measuring gear 8 and transmits it to the signal processing module 10. The signal processing module 10 processes and analyzes the signal, converts it into the vehicle's speed signal, and then transmits it to the vehicle control system wirelessly or via wire. At the same time, the static charge generated by wheel-rail friction and the operation of electrical equipment will be conducted to the ground through the grounding carbon brush 4 and the grounding wire 6 to ensure the electrical safety of the vehicle.

[0025] The insulating material used in the carbon brush holder 3 can effectively isolate the electrical interference between the grounding device and the speed sensor, ensuring that the two work independently and stably. The non-contact Hall sensor can accurately detect the speed of the axle 1. The contact surface between the grounding carbon brush 4, which contains copper graphite composite material, and the axle 1 can reduce wear and extend the service life of the grounding carbon brush 4. The signal processing module 10 is integrated inside the carbon brush holder 3, reducing external wiring and improving the compactness and anti-interference ability of the device.

[0026] The signal processing module in this paper uses existing components commonly used in the industry. Its connection method and structural principle are all existing technologies. Other components are all general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods, so they will not be described in detail here.

[0027] While the specific embodiments of this utility model have been described in detail above, this utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this utility model. Modifications or variations that do not involve creative labor are still within the protection scope of this utility model.

Claims

1. A combination device for grounding device at the axle end of a subway vehicle and a speed measuring device, characterized in that, include: A shaft end cover (2) is provided at the end of the axle (1). A bearing (7) is installed on the axle (1). A carbon brush bracket (3) is fixed on the shaft end cover (2). One end of a grounding carbon brush (4) is connected to the carbon brush bracket (3), and the other end is in contact with the axle (1) through a compression spring (5). A grounding wire (6) is connected to the grounding carbon brush (4) and used to conduct static charge to the ground. A speed measuring gear (8) is installed on the axle (1). A speed measuring sensor (9) is installed on the carbon brush bracket (3) and cooperates with the speed measuring gear (8) to detect the rotation speed of the axle (1). A signal processing module (10) is installed on the carbon brush bracket (3) to process the signal of the speed measuring sensor (9) and transmit the speed signal to the vehicle control system wirelessly or via wire.

2. The combined device of a subway vehicle axle end grounding device and a speed measuring device according to claim 1, characterized in that: The carbon brush holder (3) is made of insulating material to prevent electrical interference between the grounding device and the speedometer.

3. The combined device of a subway vehicle axle end grounding device and a speed measuring device according to claim 1, characterized in that: The speed sensor (9) is a non-contact sensor.

4. The combination device of a subway vehicle axle end grounding device and speed measuring device according to claim 3, characterized in that: The non-contact sensor is a Hall sensor to ensure the accuracy and reliability of speed measurement.

5. The combination device of a subway vehicle axle end grounding device and a speed measuring device according to claim 1, characterized in that: The contact surface between the grounding carbon brush (4) and the axle (1) is made of copper-containing graphite composite material to extend the service life of the grounding carbon brush (4) and reduce the maintenance frequency.

6. The combined device of a subway vehicle axle end grounding device and a speed measuring device according to claim 1, characterized in that: The signal processing module (10) is integrated inside the carbon brush holder (3), which reduces external wiring and improves the compactness and anti-interference capability of the device.

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