Arcuate tongue shaft drive assembly for train axle end speed sensor speed measurement

Abstract

This utility model discloses an arc-shaped tongue shaft drive assembly for train axle-end speed sensor speed measurement, belonging to the field of train speed measurement technology. The arc-shaped tongue shaft drive assembly for train axle-end speed sensor speed measurement includes: a drive disk and a tongue shaft plate; the drive disk and the tongue shaft plate are connected; the drive disk has a mounting groove; the side wall of the mounting groove has an arc-shaped clearance surface; the side wall of the tongue shaft plate has an arc-shaped mounting surface; when the tongue shaft plate is installed in the mounting groove, the arc-shaped mounting surface and the arc-shaped clearance surface are aligned; this utility model uses an arc-shaped surface fit between the arc-shaped mounting surface of the tongue shaft plate and the arc-shaped clearance surface of the drive disk mounting groove, replacing the traditional straight surface and arc-shaped surface fit method; at the same time, an appropriate driving gap is set between the straight mounting groove and the tongue shaft plate, and this gap remains stable even after the tongue shaft plate wears, avoiding deviation of the speed sensor output signal due to excessive gap, effectively improving speed measurement accuracy.

Description

Technical Field

[0001] This utility model relates to the field of train speed measurement technology, and in particular to an arc-shaped tongue shaft drive assembly for train axle end speed sensor speed measurement. Background Technology

[0002] In the speed measurement system of the train axle end speed sensor, the speed measurement function is generally achieved by using a drive method in which the tongue shaft and the drive disc cooperate. In the traditional structure, the drive tongue shaft and the speed sensor are designed as one piece, while the drive disc is installed outside the axle pressure plate or designed as one piece with the pressure plate. When the train is moving, the axle rotates, which drives the drive disc to rotate. The drive disc further drives the tongue shaft to rotate. The speed sensor achieves speed measurement by detecting the change in the rotational position of the tongue shaft.

[0003] However, traditional drive methods have certain defects and shortcomings: On the one hand, the drive clearance is relatively large, especially the clearance between the short side of the tongue shaft and the arc of the waist-shaped hole of the drive disc; since the speed sensor's speed measurement principle relies on the detection of changes in the shaft's rotational position, excessive drive clearance will directly affect the sensor's output signal, which may lead to a decrease in speed measurement accuracy; on the other hand, during long-term use, the four edges of the tongue shaft are prone to wear, which will further increase the clearance between the short side of the tongue shaft and the arc of the waist-shaped hole of the drive disc. After the clearance increases, the drive shaft and the drive disc are prone to sliding against each other along the long side. Especially when the train passes through complex road conditions such as switches, intersections, and curves, the detection signal will fluctuate accordingly, causing the output signal to be unstable and seriously affecting the reliability of the speed measurement system. Utility Model Content

[0004] The purpose of this invention is to solve the problems mentioned in the background art, and to propose an arc-shaped tongue shaft drive assembly for speed measurement of train axle end speed sensors.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The arc-shaped tongue shaft drive assembly for speed measurement using a train axle-end speed sensor includes:

[0007] The drive disc and the tongue plate are connected;

[0008] The drive disk has a mounting slot;

[0009] The mounting groove has an arc-shaped clearance surface on its side wall;

[0010] The tongue plate has an arc-shaped mounting surface on its side wall;

[0011] When the tongue plate is installed in the mounting groove, the arc mounting surface is opposite to the arc clearance surface.

[0012] Preferably, a mounting plate is fixedly connected to the tongue shaft plate, and a first mounting hole is provided on the mounting plate.

[0013] Furthermore, a second mounting hole is provided on the drive disk.

[0014] Preferably, the mounting slot is a straight slot.

[0015] Preferably, the thickness of the tongue plate is 6.9-7.1 mm.

[0016] Preferably, the length of the tongue plate is 38.4-38.6 mm.

[0017] Preferably, the thickness of the mounting plate is 3.9-4.1 mm.

[0018] Compared with the prior art, this utility model provides an arc-shaped tongue shaft drive assembly for speed measurement of train axle-end speed sensors, which has the following beneficial effects:

[0019] 1. This utility model adopts an arc surface fit between the arc mounting surface of the tongue plate and the arc clearance surface of the drive plate mounting groove, replacing the traditional straight surface and arc surface fit method; at the same time, an appropriate driving gap is set between the straight mounting groove and the tongue plate, and this gap can remain stable even after the tongue plate is worn, avoiding the deviation of the speed sensor output signal caused by excessive gap, and effectively improving the speed measurement accuracy.

[0020] 2. In this utility model, the contact gap between the tongue plate and the drive disc is small, and the arc surface fit reduces stress concentration and reduces the wear on the side of the tongue plate. Even when the train passes through complex road conditions such as turnouts, intersections, and curves, the mutual sliding between the tongue plate and the drive disc along the long side is greatly reduced, the phenomenon of signal fluctuation is significantly reduced, and the output signal of the speed sensor is more stable. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the arc-shaped tongue shaft drive assembly for train axle end speed sensor speed measurement proposed in this utility model;

[0022] Figure 2 This is an exploded view of the arc-shaped tongue shaft drive assembly for speed measurement using a train axle-end speed sensor proposed in this utility model.

[0023] Figure 3 This is a top view of the arc-shaped tongue shaft drive assembly for measuring train axle end speed sensors proposed in this utility model.

[0024] Figure 4 This is a schematic diagram of the tongue plate in the arc-shaped tongue drive assembly for speed measurement of train axle end speed sensor proposed in this utility model.

[0025] In the figure: 1. Drive plate; 101. Second mounting hole; 102. Mounting groove; 1021. Arc relief surface; 2. Tongue plate; 201. Mounting plate; 2011. First mounting hole; 202. Arc mounting surface. Detailed Implementation

[0026] 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.

[0027] Example:

[0028] Reference Figures 1-4 A speed sensor drive assembly for measuring train speed using an arc-shaped tongue shaft includes:

[0029] Drive disk 1 and tongue shaft plate 2; drive disk 1 and tongue shaft plate 2 are connected;

[0030] The drive disk 1 has an installation slot 102;

[0031] An arc-shaped clearance surface 1021 is provided on the side wall of the mounting groove 102;

[0032] A circular arc mounting surface 202 is provided on the side wall of the tongue plate 2;

[0033] When the tongue plate 2 is installed in the mounting groove 102, the arc mounting surface 202 is opposite to the arc clearance surface 1021.

[0034] A mounting plate 201 is fixedly connected to the tongue plate 2, and a first mounting hole 2011 is provided on the mounting plate 201.

[0035] The drive disk 1 has a second mounting hole 101.

[0036] Mounting slot 102 is a straight slot.

[0037] The thickness of the tongue plate 2 is 7mm.

[0038] The length of the tongue plate 2 is 38.5mm.

[0039] The thickness of mounting plate 201 is 4mm.

[0040] Reference Figures 1-4During installation and use, the drive plate 1 is installed outside the axle pressure plate through the second mounting hole 101, or it is fixed together with the axle pressure plate according to the design requirements. During installation, ensure that the drive plate 1 is accurately positioned and firmly fixed to avoid loosening during subsequent use. Then, the mounting plate 201 on the tongue plate 2 is fixedly connected to the rotating shaft of the speed sensor through the first mounting hole 2011, ensuring that the tongue plate 2 and the speed sensor are integrated. Align the tongue plate 2, which is already connected to the speed sensor, with the straight mounting groove 102 on the drive plate 1, so that the arc mounting surface 202 of the tongue plate 2 is opposite to the arc clearance surface 1021 of the mounting groove 102. Then, place the tongue plate 2 into the mounting groove 102. Adjust the position of the speed sensor to ensure that the tongue plate 2 can rotate flexibly in the mounting groove 102 without obvious jamming. Then fix the speed sensor to complete the installation of the entire drive assembly.

[0041] This invention changes the original method of matching straight and curved surfaces by using an arc-shaped mating surface between the arc mounting surface 202 of the tongue plate 2 and the arc clearance surface 1021 of the mounting groove 102 on the drive disk 1. At the same time, an appropriate driving gap is set between the straight mounting groove 102 and the tongue plate 2, and this gap can remain stable even after the tongue plate 2 is worn, avoiding deviation of the speed sensor output signal due to excessive gap, and effectively improving the speed measurement accuracy.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A curved tongue shaft drive assembly for speed measurement using a train axle-end speed sensor, characterized in that, include: A drive disc (1) and a tongue plate (2); the drive disc (1) and the tongue plate (2) are connected; The drive disk (1) has an installation slot (102); The mounting groove (102) has an arc-shaped clearance surface (1021) on its side wall; The tongue plate (2) has an arc mounting surface (202) on its side wall; When the tongue plate (2) is installed in the mounting groove (102), the arc mounting surface (202) is opposite to the arc clearance surface (1021).

2. The cambered tongue shaft drive assembly for train axle end speed sensor speed measurement of claim 1, wherein, A mounting plate (201) is fixedly connected to the tongue plate (2), and a first mounting hole (2011) is provided on the mounting plate (201).

3. The cambered tongue shaft drive assembly for train axle end speed sensor speed measurement of claim 1, wherein, The drive disk (1) has a second mounting hole (101).

4. The cambered tongue shaft drive assembly for train axle end speed sensor speed measurement of claim 1, wherein, The mounting slot (102) is a straight slot.

5. The cambered tongue shaft drive assembly for train axle end speed sensor speed measurement of claim 1, wherein, The thickness of the tongue plate (2) is 6.9-7.1 mm.

6. The cambered tongue shaft drive assembly for train axle end speed sensor speed measurement of claim 5, wherein, The length of the tongue plate (2) is 38.4-38.6 mm.

7. The cambered tongue shaft drive assembly for train axle end speed sensor speed measurement of claim 2, wherein, The thickness of the mounting plate (201) is 3.9-4.1 mm.

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