Tool for measuring scratch depth of axle
By designing a tool for measuring axle scratch depth, including digital depth ruler and positioning components, the problems of low measurement accuracy and high equipment in the prior art are solved, and accurate measurement of axle scratch depth is achieved and portable use is achieved, which reduces factory repair costs.
Patent Information
- Application Number
- CN202421292868.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-06-06
AI Technical Summary
When measuring the depth of axle scratches, the prior art has low accuracy and cannot measure defects with smaller sizes. The special equipment is complex in structure and high in cost, making it difficult to widely promote and portable.
A tool set including a digital depth ruler and a positioning assembly is designed. The positioning assembly consists of a base, a first tool set and a second tool set. The digital depth ruler is slidably connected to the base in a horizontal direction. The probe slot penetrates the base. The probe can slide in the probe slot to ensure alignment with the deepest point of scratches.
It realizes accurate measurement of the depth of the axle scratch, with a simple structure and low cost, suitable for portable use, shortens measurement time and reduces factory repair costs.
Smart Images
Figure CN222544622U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of axle scratch detection, in particular to a tool for measuring the depth of axle scratches. Background Art
[0002] In subway maintenance operations, a huge amount of wheels are replaced. During the wheel withdrawal process, scratches on the axles are often found. If the scratches at different positions on the axles exceed a certain depth, the axles need to be scrapped and replaced with new ones. Therefore, during maintenance operations, it is also necessary to measure the scratch depth of the axles.
[0003] The existing technology generally uses depth gauges or steel plate rulers for measurement, and the numerical errors measured by the above methods are large; due to the low measurement accuracy, the above methods cannot measure small defects with accumulated scratches around the defects. The existing special surface defect measurement equipment has a complex structure and high cost, which is not convenient for widespread promotion and use; it is large in size, has low maintenance efficiency, is not easy to carry, cannot be carried out on-site portable operations, and has a limited scope of use.
[0004] Therefore, there is an urgent need to provide a tool for measuring the depth of axle scratches, which can improve the measurement accuracy, simplify the structure, reduce the cost, and perform portable operations compared to the existing technology. Utility Model Content
[0005] The utility model solves the technical problems existing in the prior art and provides a tool for measuring the scratch depth of an axle.
[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0007] A tool for measuring the depth of axle scratches, comprising a digital depth gauge and a positioning assembly, the positioning assembly comprising a base, a first tool seat and a second tool seat, the first tool seat and the second tool seat are respectively fixedly connected to the two ends of the lower wall of the base, the digital depth gauge is arranged to pass through the base in the vertical direction, the front ends of the first tool seat and the second tool seat are arranged flush, and the rear ends of the first tool seat and the second tool seat are also arranged flush, one end of the base extends out of the first tool seat and the second tool seat, and the digital depth gauge is slidably connected to the base in the horizontal direction.
[0008] Furthermore, a probe groove is provided on the base, and the probe groove runs through the base. Part of the probe groove is located on the part of the base extending out of the first tooling seat and the second tooling seat. The digital depth gauge extends into the probe groove, and the digital depth gauge is slidably connected to the inside of the probe groove along the horizontal direction.
[0009] Furthermore, the probe groove includes a semicircular groove and a rectangular groove, and the rectangular groove away from the semicircular groove is arranged on a portion of the base extending out of the first tooling seat and the second tooling seat.
[0010] Furthermore, one end of the rectangular groove is communicated with the semicircular groove, and the other end of the rectangular groove is communicated with the outside of the positioning assembly.
[0011] Furthermore, the digital depth gauge includes a head, a probe, a base, a processor and a display screen. The upper end of the base is connected to the head, one end of the probe extends into the head, and the other end of the probe passes through the base and extends into the probe slot. The probe is slidably connected to the head, the processor is arranged inside the head, and a display screen is provided on the head. The probe and the display screen are electrically connected to the processor.
[0012] Furthermore, the probe is a probe type displacement sensor.
[0013] Furthermore, the base, the first tooling seat, and the second tooling seat are all rectangular parallelepiped structures.
[0014] Furthermore, the lower wall of the base is a plane, the lower wall of the base is in contact with the upper wall of the base, and the width of the base is smaller than the width of the base.
[0015] Furthermore, the first tooling seat and the second tooling seat are in parallel linear contact with the axle.
[0016] Furthermore, the positioning component is made of nylon.
[0017] Compared with the prior art, the beneficial effects of the utility model are:
[0018] (1) The first and second tooling seats of the utility model are in parallel linear contact with the axle. When the positioning assembly is mounted on the axle, it can ensure that the positioning assembly is parallel to the axis of the axle. In order to avoid interference from scratch accumulation, the base extends out of the first and second tooling seats to set a distance, so that the digital depth gauge can slide on the base, so that the probe is aligned with the deepest scratch point. At the same time, it is ensured that the first and second tooling seats are in contact with the undamaged position of the axle, with high stability, which greatly shortens the time of measuring the scratch depth of the axle and achieves accurate measurement.
[0019] (2) The positioning assembly of the utility model is made of nylon material, has a simple structure, is easy to detect, has low manufacturing cost, low maintenance cost, and is easy to use. It provides a basis for judging whether the axle is scrapped, greatly saving factory repair costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is the front view of the overall structure of the utility model.
[0021] Figure 2 It is a top view of the positioning assembly of the utility model.
[0022] Figure 3 It is a left view of the positioning assembly of the utility model.
[0023] Description of reference numerals:
[0024] 1. Digital depth gauge; 11. Meter head; 12. Probe; 13. Base; 2. Base; 3. First tooling seat; 4. Second tooling seat; 5. Probe slot; 51. Semicircular slot; 52. Rectangular slot. DETAILED DESCRIPTION
[0025] The technical solution of the utility model will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the utility model. It should be noted that the orientation or position relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", etc. is based on the orientation or position relationship shown in the accompanying drawings. It is only for the convenience of describing the utility model and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.
[0026] like Figure 1 , Figure 2 , Figure 3 As shown, the utility model provides a tool for measuring the depth of axle scratches, including a digital depth gauge 1 and a positioning assembly, the positioning assembly includes a base 2, a first tool seat 3 and a second tool seat 4, the first tool seat 3 and the second tool seat 4 are respectively fixedly connected to the two ends of the lower wall of the base 2, and a probe groove 5 is provided on the upper wall of the base 2, the probe groove 5 is arranged to penetrate the base 2 in the vertical direction, and the digital depth gauge 1 is extended into the probe groove 5; the positioning assembly is made of nylon.
[0027] The digital depth gauge 1 includes a head 11, a probe 12 and a base 13. The head 11 is connected to the upper end of the base 13. One end of the probe 12 is inserted into the head 11. The probe 12 is slidably connected to the head 11. The other end of the probe 12 is passed through the base 13. The lower end of the probe 12 extends out of the base 13. The probe 12 is a probe-type displacement sensor. A processor is provided inside the head 11. The processor is used to receive and process the displacement signal transmitted by the probe 12. A display screen is provided on the head 11. The processor displays the displacement signal processed by the probe 12 on the display screen. The circuits electrically connecting the processor, the probe 12 and the display screen are all prior arts and will not be repeated here. The lower wall of the base 13 is a plane. The diameter of the probe 12 is 5 mm. The width of the base 13 is smaller than the width of the base 2.
[0028] The first tooling seat 3 and the second tooling seat 4 are vertically connected to the base 2. The base 2, the first tooling seat 3, and the second tooling seat 4 are all rectangular structures, that is, the upper wall of the base 2, the lower wall of the first tooling seat 3, and the lower wall of the second tooling seat 4 are all flat; the first tooling seat 3 and the second tooling seat 4 have the same size; the rear end of the base 2 is flush with the rear end of the first tooling seat 3 and the rear end of the second tooling seat 4, or the front end of the base 2 is flush with the front end of the first tooling seat 3 and the front end of the second tooling seat 4; the left end of the base 2 is flush with the left end of the first tooling seat 3, and the right end of the base 2 is flush with the right end of the second tooling seat 4.
[0029] When the rear wall of the base 2 is flush with the rear end of the first fixture seat 3 and the rear end of the second fixture seat 4, the front end of the base 2 extends out of the first fixture seat 3 and the second fixture seat 4 by a set distance; when the front end of the base 2 is flush with the front end of the first fixture seat 3 and the front end of the second fixture seat 4, the rear end of the base 2 extends out of the first fixture seat 3 and the second fixture seat 4 by a set distance, and the set distance is preferably 5 mm. Figure 3 What is shown is that the rear end of the base 2 is flush with the rear end of the first tooling seat 3 and the rear end of the second tooling seat 4 .
[0030] The probe groove 5 includes a connected semicircular groove 51 and a rectangular groove 52, one end of the rectangular groove 52 is connected to the semicircular groove 51, and the other end of the rectangular groove 52 is connected to the outside, the radius of the cross section of the semicircular groove 51 is 3mm, the radial length of the rectangular groove 52 along the semicircular groove 51 is 8mm, and the 5mm length portion of the rectangular groove 52 away from the semicircular groove 51 is set on the portion of the base 2 extending out of the first tooling seat 3 and the second tooling seat 4.
[0031] The diameter range of the axle acted on by the utility model is 120-185mm. When in use, the lower wall of the base 2 does not contact the axle, and the lower walls of the first tooling seat 3 and the second tooling seat 4 contact the axle, so the radius, chord length and arch height of the axle need to satisfy the following formula:
[0032]
[0033] In the above formula, A represents the arch height, which is the height of the first tooling seat 3 and the second tooling seat 4, r represents the radius of the axle, and x represents the chord length, which is the distance between the first tooling seat 3 and the second tooling seat 4.
[0034] When the length of the base 2 is set to 100 mm, the length of the first tooling seat 3 and the second tooling seat 4 is set to 10 mm, the chord length is 80 mm. Substituting the chord length into the above formula, the arch height is 15.3 mm when the axle diameter is minimum, and the arch height is 9.1 mm when the axle diameter is maximum. Considering the need to observe the position of the probe 12, the arch height is set to 18 mm.
[0035] Therefore, the dimensions of the base 2 are: 100 mm in length, 20 mm in width, and 10 mm in height; the dimensions of the first tooling seat 3 and the second tooling seat 4 are: 10 mm in length, 15 mm in width, and 18 mm in height.
[0036] In some restricted measuring positions, in order to ensure that the first fixture seat 3 and the second fixture seat 4 are in contact with the undamaged part of the axle and measure the deepest scratch point, the base 2 is arranged to extend out of the first fixture seat 3 and the second fixture seat 4 by a set distance, and the rectangular groove 52 is partially arranged on the extended part of the base 2, so that the digital depth gauge 1 can be fine-tuned forward and backward to ensure the accuracy of the depth measurement.
[0037] The utility model provides a tool for measuring the depth of axle scratches according to the working principle: a first tool seat 3 and a second tool seat 4 are set at an undamaged position of the axle, a probe 12 of a digital depth gauge 1 is inserted into a probe slot 5, a lower wall of a base 13 contacts an upper wall of a base 2, the digital depth gauge 1 is stably placed, the position of the digital depth gauge 1 in the probe slot 5 is adjusted, the probe 12 is aligned with the deepest point of the axle scratch, and the scratch depth at that position is measured by the digital depth gauge 1.
[0038] The positioning assembly of the utility model is made of nylon material, and the detection is easy; the first fixture seat 3 and the second fixture seat 4 are in parallel linear contact with the axle. When the positioning assembly is mounted on the axle, it can ensure that the positioning assembly is parallel to the axis of the axle, so as to achieve accurate detection; in order to avoid the interference of scratch accumulation, the base 2 extends out of the first fixture seat 3 and the second fixture seat 4 to set a distance, so that the digital depth gauge 1 can slide in the probe groove 5, so that the probe 12 is aligned with the deepest point of the scratch, and at the same time ensures that the first fixture seat 3 and the second fixture seat 4 are in contact with the undamaged position of the axle. Compared with the existing equipment, the utility model has a simple structure, low manufacturing cost, convenient use, high stability, and low maintenance cost, which greatly shortens the timeliness of the axle scratch depth measurement, achieves accurate measurement, provides a basis for the axle scrapping, and greatly saves the factory repair cost.
[0039] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Simple modifications or equivalent substitutions of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.
Claims
1. A tool for measuring the scratch depth of an axle, characterized in that: It includes a digital depth gauge and a positioning component, the positioning component includes a base, a first tool seat and a second tool seat, the first tool seat and the second tool seat are respectively fixedly connected to the two ends of the lower wall of the base, the digital depth gauge is arranged through the base in the vertical direction, the front ends of the first tool seat and the second tool seat are arranged flush, and the rear ends of the first tool seat and the second tool seat are also arranged flush, one end of the base extends out of the first tool seat and the second tool seat, and the digital depth gauge is slidably connected to the base in the horizontal direction.
2. The tool for measuring the scratch depth of an axle according to claim 1, characterized in that: The base is provided with a probe groove, which penetrates the base. Part of the probe groove is located on the part of the base extending out of the first tooling seat and the second tooling seat. The digital depth gauge extends into the probe groove. The digital depth gauge is slidably connected to the inside of the probe groove along the horizontal direction.
3. The tool for measuring the scratch depth of an axle according to claim 2, characterized in that: The probe groove includes a semicircular groove and a rectangular groove, and the rectangular groove away from the semicircular groove is arranged on a portion of the base extending out of the first tooling seat and the second tooling seat.
4. The tool for measuring the scratch depth of an axle according to claim 3, characterized in that: One end of the rectangular groove is communicated with the semicircular groove, and the other end of the rectangular groove is communicated with the outside of the positioning assembly.
5. The tool for measuring the scratch depth of an axle according to claim 2, characterized in that: The digital depth gauge includes a head, a probe, a base, a processor and a display screen. The upper end of the base is connected to the head, one end of the probe extends into the head, and the other end of the probe passes through the base and extends into the probe slot. The probe is slidably connected to the head, the processor is arranged inside the head, and a display screen is provided on the head. The probe and the display screen are electrically connected to the processor.
6. The tool for measuring the scratch depth of an axle according to claim 5, characterized in that: The probe is a probe type displacement sensor.
7. The tool for measuring the scratch depth of an axle according to claim 5, characterized in that: The base, the first tooling seat, and the second tooling seat are all rectangular parallelepiped structures.
8. The tool for measuring the scratch depth of an axle according to claim 7, characterized in that: The lower wall of the base is a plane, the lower wall of the base is in contact with the upper wall of the base, and the width of the base is smaller than the width of the base.
9. The tool for measuring the scratch depth of an axle according to claim 7, characterized in that: The first tooling seat and the second tooling seat are in parallel and linear contact with the axle.
10. The tool for measuring axle scratch depth according to claim 1, characterized in that: The material of the positioning component is nylon.