Tester wheel set

Abstract

The utility model discloses a tester wheel set which is characterized in that the tester wheel set comprises a walking wheel body, an installation shaft and two bearings, the walking wheel body is installed in the middle of the installation shaft, the walking wheel body is of a hollow cylindrical structure, the bearings are installed at the ends of the installation shaft and arranged on the two sides of the walking wheel body, and the bearings are arranged on the installation shaft. The walking wheel body is made of silicon nitride ceramic.

Description

Technical Field

[0001] The utility model belongs to the technical field of test accessories and relates to a tester wheel set. Background Art

[0002] Accurately measuring the speed of a train or high-speed rail is crucial. To ensure safe and efficient operation, wheel axle pulse speed sensors are often used to perform this critical speed measurement. These sensors detect the rotational speed of the wheels and convert this data into electrical signals, allowing real-time monitoring of train speed changes.

[0003] The tester wheel is an important part of the wheel axle pulse speed sensor. However, the existing tester wheel has a simple structure and its rotation stability will gradually decrease under long-term high-speed operation. Therefore, it is necessary to design a tester wheel set to solve the above problem. Summary of the Invention

[0004] The purpose of the utility model is to solve the above problems in the existing technology and to propose a tester wheel set.

[0005] To achieve the above-mentioned purpose, the technical solution of the utility model is: a tester wheel set, characterized in that it includes a walking wheel body, a mounting shaft and two bearings, the walking wheel body is installed in the middle of the mounting shaft, the walking wheel body is a hollow cylindrical structure, the bearings are installed at the end of the mounting shaft, and the bearings are arranged on both sides of the walking wheel body, and the material of the walking wheel body is silicon nitride ceramic.

[0006] The surface roughness of the walking wheel body is Ra0.8.

[0007] The mounting shaft includes a fixed shaft body, and the fixed shaft body cooperates with the walking wheel body. Both ends of the fixed shaft body have limiting bosses, and the diameter of the limiting bosses is larger than the diameter of the fixed shaft body. The limiting boss is connected to the outside of the limiting boss, and the fixed boss cooperates with the bearing. One of the fixed bosses also has a working boss outside, and the diameter of the working boss is larger than the diameter of the fixed boss.

[0008] By adopting the above technical solution, the beneficial effects of the utility model are:

[0009] The utility model achieves structural optimization by connecting the walking wheel body at the center position of the installation shaft and arranging a bearing on both sides of the installation shaft; the walking wheel body is made of silicon nitride ceramic material and is installed at the detection iron pipe position at the rear of vehicles such as motor vehicles or high-speed railways, and can maintain stable operating performance during high-speed operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1It is a three-dimensional structural diagram of the utility model.

[0011] Figure 2 This is a schematic diagram of the planar structure of the utility model.

[0012] Figure 3 It is an exploded schematic diagram of another embodiment of the utility model.

[0013] In the figure, 1, walking wheel body; 2, bearing; 3, mounting shaft; 3a, limiting boss; 3a1, threaded hole; 3b, fixing boss; 3c, working boss; 3d, fixing shaft body; 3d1, threaded portion. DETAILED DESCRIPTION

[0014] In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

[0015] like Figure 1-Figure 2 As shown, the tester wheel set includes a walking wheel body 1, a mounting shaft 3 and two bearings 2. In this embodiment, the model of the bearing 2 is 6202; the walking wheel body 1 is installed in the middle of the mounting shaft 3, and the walking wheel body 1 and the mounting shaft 3 are relatively fixed, and there is no relative rotation between the two; the walking wheel body 1 is a hollow cylindrical structure, the bearing 2 is installed at the end of the mounting shaft 3, and the bearings 2 are arranged on both sides of the walking wheel body 1. The material of the walking wheel body 1 is silicon nitride ceramic. In this embodiment, the walking wheel body 1 adopts an existing product purchased on the market.

[0016] The surface roughness of the running wheel body 1 is Ra0.8.

[0017] The mounting shaft 3 includes a fixed shaft body 3d, and the fixed shaft body 3d cooperates with the walking wheel body 1. Both ends of the fixed shaft body 3d have limiting bosses 3a, and the diameter of the limiting boss 3a is larger than the diameter of the fixed shaft body 3d. The limiting boss 3a is connected to the outside of the fixing boss 3b, and the fixed boss 3b cooperates with the bearing 2. One of the fixed bosses 3b also has a working boss 3c, and the diameter of the working boss 3c is larger than the diameter of the fixed boss 3b.

[0018] In this embodiment, the mounting shaft 3 is made of existing materials and can be an integrally formed structure.

[0019] Of course, it can also be a split structure, which is a two-section structure, specifically: the working boss 3c, the fixed boss 3b and the limiting boss 3a at one end are the first section, and a threaded hole 3a1 is provided in the limiting boss 3a, and the inner side of the limiting boss 3a also has anti-slip grooves; the fixed boss 3b, the limiting boss 3a and the fixed shaft body 3d at the other end are the second section, and the fixed shaft body 3d has a threaded portion 3d1 that matches the threaded hole 3a1, and the inner side of the limiting boss 3a also has anti-slip grooves. With this structure, the two sections are connected by a threaded structure, so that the walking wheel body 1 can be conveniently connected to the mounting shaft 3, and the walking wheel body 1 will not be separated from the mounting shaft 3 when running at high speed, and the rotation direction of the walking wheel body 1 is consistent with the locking direction of the threaded structure. The specific structure is as follows Figure 3 shown.

[0020] The utility model achieves structural optimization by connecting the walking wheel body 1 at the center position of the installation shaft 3 and arranging a bearing 2 on both sides of the installation shaft 3; the walking wheel body 1 is made of silicon nitride ceramic material and is installed at the detection iron pipe position at the rear of vehicles such as motor vehicles or high-speed railways, and can maintain stable operating performance during high-speed operation.

[0021] In summary, the silicon nitride material with a specific gravity of 3.2 is lighter, more wear-resistant, faster, resistant to freezing and high temperatures, and can remain stable at a high speed of 550km / h. In extremely cold areas in the north, thermal expansion and contraction are controlled above zero: 800° and below zero: 150°.

[0022] The above components are all common standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0023] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. Tester wheel set, characterized in that, The invention comprises a walking wheel body (1), a mounting shaft (3) and two bearings (2), wherein the walking wheel body (1) is mounted in the middle of the mounting shaft (3), the walking wheel body (1) is a hollow cylindrical structure, the bearings (2) are mounted at the ends of the mounting shaft (3), and the bearings (2) are arranged on both sides of the walking wheel body (1), and the material of the walking wheel body (1) is silicon nitride ceramic.

2. A tester wheel set according to claim 1, characterized in that: The surface roughness of the walking wheel body (1) is Ra0.

8.

3. A tester wheel set according to claim 1, characterized in that: The mounting shaft (3) includes a fixed shaft body (3d), and the fixed shaft body (3d) cooperates with the walking wheel body (1). Both ends of the fixed shaft body (3d) have limiting bosses (3a), the diameter of the limiting bosses (3a) is larger than the diameter of the fixed shaft body (3d), the limiting bosses (3a) are externally connected to the fixing bosses (3b), and the fixing bosses (3b) cooperate with the bearing (2), one of the fixing bosses (3b) also has a working boss (3c), the diameter of the working boss (3c) is larger than the diameter of the fixing boss (3b).

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