Caliper for measuring inner diameter of wheel rim of railway vehicle

Abstract

The utility model belongs to the technical field of measuring devices, and particularly relates to a caliper for measuring the inner diameter of a wheel rim of a railway vehicle, which comprises a main scale, two groups of positioning assemblies are arranged on the main scale in a sliding manner, and the positioning assemblies are used for realizing reference positioning of the caliper relative to the end face of the rim. A zero-scale sliding block and a digital display mechanism are further arranged on the main ruler in a sliding mode, measuring claws are arranged on the lower surface of the zero-scale sliding block and the lower surface of the digital display mechanism, and positioning screws are connected to the positioning assembly, the zero-scale sliding block and the digital display mechanism in a threaded mode. Therefore, the positioning assembly, the zero-scale slide block and the digital display mechanism can be fixed with the main ruler. Compared with sample plate detection, the rim measuring tool can measure rims of any vehicle types, is low in purchase cost, can be used for process monitoring as a digital display type measuring tool, and is beneficial to improving product quality.

Description

Technical Field

[0001] This utility model belongs to the field of measuring device technology, specifically relating to a caliper for measuring the inner diameter of the rim of a railway vehicle wheel. Background Technology

[0002] After railway vehicle wheels are manufactured, they need to be inspected to determine their quality. Because the end face edges of the wheel rim are chamfered, direct measurement is not possible. In existing technology, templates are used for inspection. Figure 1 As shown, sample testing has advantages such as simple operation, high efficiency and convenient use, but it also has many disadvantages, such as long sample production cycle, high procurement cost, and the need to manufacture special samples for testing each type of railway vehicle wheel. Moreover, it can only judge whether it is qualified or not, but cannot obtain specific data, which is not conducive to quality control. Utility Model Content

[0003] This invention provides a caliper for measuring the inner diameter of the rim of railway vehicle wheels to address the above-mentioned problems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A caliper for measuring the inner diameter of a railway vehicle wheel rim includes a main scale. Two sets of positioning components are slidably mounted on the main scale. The positioning components are used to achieve reference positioning of the caliper relative to the end face of the wheel rim. A zero-scale slider and a digital display mechanism are also slidably mounted on the main scale. Measuring claws are provided on the lower surfaces of the zero-scale slider and the digital display mechanism. Positioning screws are threaded onto the positioning components, the zero-scale slider, and the digital display mechanism to facilitate the fixation of the positioning components, the zero-scale slider, and the digital display mechanism to the main scale.

[0006] Furthermore, the positioning component includes a positioning slider that is slidably disposed on the main scale, and a positioning block that is fixedly disposed on the lower surface of the positioning slider, the lower surface of the positioning block serving as a reference surface and contacting the end face of the wheel rim.

[0007] Furthermore, a sliding sleeve is fixedly installed on the lower surface of both the zero-scale slider and the digital display mechanism. The measuring claw is slidably installed inside the sliding sleeve, and a fastening screw is threadedly connected to one side of the sliding sleeve to facilitate the fixing of the measuring claw to the sliding sleeve.

[0008] Furthermore, the measuring jaws are provided with graduations to ensure that the two measuring jaws are at the same height.

[0009] Furthermore, a roller is rotatably connected to the lower end of the measuring claw to reduce the friction between the measuring claw and the rim and prevent the measuring claw from scratching the rim.

[0010] Furthermore, limit blocks are provided at both ends of the main scale.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] This invention uses the lower surface of the positioning block as a reference surface to contact the end face of the wheel rim, ensuring the relative parallelism between the caliper and the end face of the wheel rim, thus achieving positioning of the caliper and the end face of the wheel rim. At the same time, it uses measuring jaws to measure the dimensions of the contact position between the wheel rim and the measuring jaws. Without considering the wheel rim's shape error, the dimensional error at the measuring jaws reflects the inner diameter error of the wheel rim. Compared with template inspection, this invention can measure wheel rims of any vehicle model and has a low procurement cost. Furthermore, as a digital display measuring tool, this invention can be used for process monitoring, which is beneficial to improving product quality. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure for sample testing;

[0014] Figure 2 This is a schematic diagram of the structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the connection of the zero-scale slider of this utility model;

[0016] Figure 4 This is a practical state diagram of the present invention;

[0017] In the figure, the main scale is 1, the zero scale slider is 2, the digital display mechanism is 3, the measuring claw is 4, the positioning screw is 5, the positioning slider is 6, the positioning block is 7, the sliding sleeve is 8, the fastening screw is 9, the scale is 10, the roller is 11, and the limit block is 12. Detailed Implementation

[0018] To further illustrate the technical solution of this utility model, the following embodiments will be used to further explain this utility model.

[0019] like Figures 2 to 4As shown, a caliper for measuring the inner diameter of a railway vehicle wheel rim includes a main scale 1. Limit blocks 12 are provided at both ends of the main scale 1. Two sets of positioning components are slidably mounted on the main scale 1, used for reference positioning of the caliper relative to the end face of the wheel rim. A zero-scale slider 2 and a digital display mechanism 3 are also slidably mounted on the main scale 1. Sliding sleeves 8 are fixedly mounted on the lower surfaces of both the zero-scale slider 2 and the digital display mechanism 3. The measuring jaws 4 are slidably mounted within the sliding sleeves 8. A threaded connection is made to one side of the sliding sleeve 8. A fastening screw 9 is provided to fix the measuring claw 4 to the sliding sleeve 8. A scale 10 is provided on the measuring claw 4 to ensure that the two measuring claws 4 are at the same height. A roller 11 is rotatably connected to the lower end of the measuring claw 4 to reduce the friction between the measuring claw 4 and the rim and prevent the measuring claw 4 from scratching the rim. Positioning screws 5 are threadedly connected to the positioning component, the zero scale slider 2 and the digital display mechanism 3 to fix the positioning component, the zero scale slider 2 and the digital display mechanism 3 to the main scale 1.

[0020] The positioning component includes a positioning slider 6 slidably mounted on the main scale 1, and a positioning block 7 fixedly mounted on the lower surface of the positioning slider 6. The lower surface of the positioning block 7 serves as a reference surface and contacts the end face of the wheel rim.

[0021] The foregoing has shown and described the main features and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.

[0022] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A caliper for measuring the inner diameter of the rim of a railway vehicle wheel, characterized in that: The caliper includes a main scale (1), on which two sets of positioning components are slidably arranged. The positioning components are used to achieve the reference positioning of the caliper relative to the end face of the wheel rim. A zero scale slider (2) and a digital display mechanism (3) are also slidably arranged on the main scale (1). Measuring claws (4) are provided on the lower surfaces of the zero scale slider (2) and the digital display mechanism (3). Positioning screws (5) are threadedly connected to the positioning components, the zero scale slider (2) and the digital display mechanism (3) to facilitate the fixing of the positioning components, the zero scale slider (2) and the digital display mechanism (3) to the main scale (1).

2. A caliper for measuring the inner diameter of a railway vehicle wheel rim according to claim 1, characterized in that: The positioning component includes a positioning slider (6) that is slidably disposed on the main scale (1), and a positioning block (7) is fixedly disposed on the lower surface of the positioning slider (6). The lower surface of the positioning block (7) serves as a reference surface and contacts the end face of the wheel rim.

3. A caliper for measuring the inner diameter of a railway vehicle wheel rim according to claim 1, characterized in that: Sliding sleeves (8) are fixedly provided on the lower surfaces of the zero scale slider (2) and the digital display mechanism (3). The measuring claw (4) is slidably disposed in the sliding sleeve (8). A fastening screw (9) is threadedly connected to one side of the sliding sleeve (8) to facilitate the fixing of the measuring claw (4) and the sliding sleeve (8).

4. A caliper for measuring the inner diameter of a railway vehicle wheel rim according to claim 3, characterized in that: A scale (10) is provided on the measuring claw (4) to ensure that the two measuring claws (4) are at the same height.

5. A caliper for measuring the inner diameter of a railway vehicle wheel rim according to claim 3, characterized in that: A roller (11) is rotatably connected to the lower end of the measuring claw (4) to reduce the friction between the measuring claw (4) and the rim and prevent the measuring claw (4) from scratching the rim.

6. A caliper for measuring the inner diameter of a railway vehicle wheel rim according to claim 1, characterized in that: Limiting blocks (12) are provided at both ends of the main ruler (1).

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