Train wheel speed sensor

Abstract

The utility model discloses a train wheel speed sensor, and belongs to the field of wheel speed sensors. A train wheel speed sensor comprises a base shell and further comprises a probe shell which is connected to the base shell in a threaded mode. The hollow bracket is detachably connected in the probe shell; a pole, a coil and a permanent magnet are arranged on the hollow bracket; the circuit board is arranged on the upper side of the hollow bracket; the connecting line is arranged on the probe shell, and the connecting line is connected with the circuit board; the cable is fixedly arranged on the base shell; the female terminal is arranged at one end of the cable; the son terminal is arranged on the connecting line, and the son terminal and the mother terminal are mutually clamped; according to the utility model, the maintenance and replacement efficiency of the wheel speed sensor is effectively improved, the problem that the sealing performance is easily influenced by the adoption of a shell transverse clamping mode at present is effectively solved, and the stability of the probe shell is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wheel speed sensors, in particular to a train wheel speed sensor. Background Art

[0002] The speed sensor is a device used to detect the speed of a car. The output signal of the speed sensor can be a magnetoelectric AC signal. The speed sensor is usually installed on one side of the gear on the car's shaft, and is equipped with a magnet and a circuit board inside. The circuit board detects the changes in the magnetic field between the gear and the magnet and converts it into an electrical signal, thereby detecting the rotation speed of the car's shaft. It is often used in the fields of train speed measurement and car speed measurement.

[0003] Current train wheel speed sensors use an integrated housing, which makes it difficult to repair internal components and circuit boards. Some housings also use a transverse snap-fit ​​method, which facilitates maintenance but has a relatively poor sealing effect. Utility Model Content

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a train wheel speed sensor that can overcome the above problems or at least partially solve the above problems.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A train wheel speed sensor comprises: a base shell, and also: a probe shell, threadedly connected to the base shell; a hollow bracket, detachably connected to the probe shell; a pole, a coil and a permanent magnet are provided on the hollow bracket; a circuit board is provided on the upper side of the hollow bracket; a connecting wire is provided on the probe shell and connected to the circuit board; a cable is fixedly provided on the base shell; a female terminal is provided at one end of the cable; and a sub-terminal is provided on the connecting wire, and the sub-terminal and the female terminal are mutually clamped.

[0007] Preferably, a fixing ring is fixedly connected inside the base shell, and a sealing gasket is fixedly connected to the fixing ring.

[0008] In order to facilitate the limiting of the hollowing, a limiting pressure ring is further provided at the upper end of the hollow bracket, the circuit board is fixedly connected to the limiting pressure ring, bolts are symmetrically rotated on the probe housing, and one end of the bolt is against the limiting pressure ring, and a limiting ring matching the hollow bracket is fixedly connected inside the probe housing.

[0009] In order to improve the stability of the probe housing, preferably, a friction plate is fixedly connected to the base housing, and the friction plate is in contact with the probe housing.

[0010] In order to prevent the probe housing from shaking, further, a collar matching the base housing is fixedly connected to the probe housing, and a friction ring is arranged inside the collar.

[0011] In order to facilitate the resetting of the sub-terminal and the female terminal, preferably, a plurality of elastic ropes are fixedly connected between the base housing and the female terminal.

[0012] Compared with the prior art, the present invention provides a train wheel speed sensor with the following beneficial effects:

[0013] 1. The train wheel speed sensor can be removed by rotating the probe shell. Then, the coil, pole, permanent magnet and circuit board on the hollow bracket can be directly inspected and tested, or the internal components can be directly replaced as a whole, thereby effectively improving the efficiency of wheel speed sensor inspection and replacement. At the same time, it effectively solves the problem that the current horizontal snap-fit ​​method of the shell easily affects its sealing.

[0014] 2. The train wheel speed sensor uses a friction ring to abut against the outer wall of the base shell, which effectively increases the friction force on the probe shell on the one hand, and effectively prevents gas from entering between the probe shell and the base shell when the train is running too fast on the other hand. At the same time, the internal sealing gasket is set to effectively prevent its weathering from affecting its sealing.

[0015] 3. The train wheel speed sensor can further improve the sealing between the probe housing and the base housing through the friction ring.

[0016] The parts not involved in the device are the same as the existing technology or can be implemented by using the existing technology. The utility model effectively improves the efficiency of repairing and replacing the wheel speed sensor, and at the same time effectively solves the problem that the current method of horizontally snapping the shell easily affects its sealing, and effectively improves the stability of the probe shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a cross-sectional schematic diagram of a train wheel speed sensor proposed by the present utility model;

[0018] Figure 2 This is a partial cross-sectional schematic diagram of a train wheel speed sensor proposed by the present utility model;

[0019] Figure 3 This is a front view of a train wheel speed sensor proposed by the utility model.

[0020] In the figure: 1. Base shell; 101. Cable; 102. Female terminal; 103. Elastic rope; 104. Friction plate; 105. Fixing ring; 106. Sealing gasket; 2. Probe shell; 201. Connecting wire; 202. Sub-terminal; 203. Limiting ring; 3. Hollow bracket; 301. Pole; 302. Coil; 303. Permanent magnet; 304. Limiting pressure ring; 305. Bolt; 306. Circuit board; 4. Ring; 401. Friction ring. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] Example 1: Reference Figure 1-Figure 3 A train wheel speed sensor includes: a base shell 1, and also includes: a probe shell 2, which is threadedly connected to the base shell 1; a hollow bracket 3, which is detachably connected to the probe shell 2; a pole 301, a coil 302 and a permanent magnet 303 are provided on the hollow bracket 3; a circuit board 306 is provided on the upper side of the hollow bracket 3; a connecting wire 201 is provided on the probe shell 2, and the connecting wire 201 is connected to the circuit board 306; a cable 101 is fixedly provided on the base shell 1; a female terminal 102 is provided at one end of the cable 101; a sub-terminal 202 is provided on the connecting wire 201, and the sub-terminal 202 and the female terminal 102 are clamped with each other.

[0023] A fixing ring 105 is fixedly connected inside the base shell 1 , and a sealing gasket 106 is fixedly connected to the fixing ring 105 .

[0024] A limiting pressure ring 304 is provided at the upper end of the hollow bracket 3, and the circuit board 306 is fixedly connected to the limiting pressure ring 304. A bolt 305 is symmetrically rotated on the probe housing 2, and one end of the bolt 305 is against the limiting pressure ring 304. A limiting ring 203 matching the hollow bracket 3 is fixedly connected inside the probe housing 2.

[0025] When the wheel speed sensor needs to be repaired, the probe housing 2 is rotated and the entire probe housing 2 is removed. Then, the coil 302, pole 301, permanent magnet 303 and circuit board 306 on the hollow bracket 3 can be directly inspected and tested, or the internal components can be directly replaced as a whole, thereby effectively improving the efficiency of repairing and replacing the wheel speed sensor.

[0026] At the same time, it effectively solves the problem that the current method of horizontally snapping the shell easily affects its sealing performance.

[0027] It should be noted that the connecting wire 201 is connected to the circuit board 306 by plugging in the connection terminal.

[0028] Example 2: Reference Figure 1-Figure 3 A train wheel speed sensor is basically the same as Example 1, and further, a friction plate 104 is fixedly connected to the base shell 1, and the friction plate 104 is in contact with the probe shell 2.

[0029] The friction plate 104 abuts against the probe housing 2 , thereby effectively increasing the friction force on the probe housing 2 and effectively preventing the probe housing 2 from loosening.

[0030] A collar 4 matching the base housing 1 is fixedly connected to the probe housing 2 , and a friction ring 401 is provided inside the collar 4 .

[0031] A plurality of elastic cords 103 are fixedly connected between the base housing 1 and the female terminals 102 .

[0032] By abutting the outer wall of the base shell 1 against the friction ring 401, the friction force on the probe shell 2 is effectively increased on the one hand, and on the other hand, it effectively prevents gas from entering between the probe shell 2 and the base shell 1 when the train is running too fast. At the same time, the setting of the internal sealing gasket 106 is used to effectively prevent its weathering from affecting its sealing.

[0033] At the same time, the friction ring 401 can further improve the sealing between the probe housing 2 and the base housing 1 .

[0034] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A train wheel speed sensor, comprising: The base housing (1) is characterized in that it further comprises: A probe housing (2) is threadedly connected to the base housing (1); A hollow bracket (3) detachably connected to the probe housing (2); The hollow bracket (3) is provided with a pole (301), a coil (302) and a permanent magnet (303); A circuit board (306) is arranged on the upper side of the hollow bracket (3); A connecting line (201) is provided on the probe housing (2), and the connecting line (201) is connected to a circuit board (306); A cable (101) is fixedly mounted on the base housing (1); A female terminal (102) is provided at one end of the cable (101); The sub-terminal (202) is arranged on the connecting wire (201), and the sub-terminal (202) and the female terminal (102) are mutually clamped.

2. A train wheel speed sensor according to claim 1, characterized in that: A fixing ring (105) is fixedly connected inside the base shell (1), and a sealing gasket (106) is fixedly connected to the fixing ring (105).

3. The train wheel speed sensor according to claim 1, characterized in that: A limiting pressure ring (304) is provided at the upper end of the hollow bracket (3), the circuit board (306) is fixedly connected to the limiting pressure ring (304), a bolt (305) is symmetrically provided on the probe housing (2), and one end of the bolt (305) abuts against the limiting pressure ring (304), and a limiting ring (203) matching the hollow bracket (3) is fixedly connected inside the probe housing (2).

4. A train wheel speed sensor according to claim 1, characterized in that: A friction plate (104) is fixedly connected to the base housing (1), and the friction plate (104) is in contact with the probe housing (2).

5. The train wheel speed sensor according to claim 4, characterized in that: A collar (4) matching the base housing (1) is fixedly connected to the probe housing (2), and a friction ring (401) is provided inside the collar (4).

6. The train wheel speed sensor according to claim 1, characterized in that: A plurality of elastic ropes (103) are fixedly connected between the base housing (1) and the female terminal (102).

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