A portable micrometer measuring device for wheel diameter.

Abstract

This application discloses a portable testing device for a wheel diameter measuring instrument micrometer, comprising a portable positioning mechanism, a two-dimensional adjustment mechanism located on the portable positioning mechanism, a measuring instrument micrometer, and an alignment auxiliary device. The portable positioning mechanism includes a positioning base and a fixing member located on the positioning base. The positioning base has a slot for placing the main scale of the wheel diameter gauge reading end, and the main scale of the wheel diameter gauge reading end is fixed to the positioning base by the fixing member. The two-dimensional adjustment mechanism is disposed on the positioning base, and the measuring instrument micrometer is disposed on the two-dimensional adjustment mechanism. The two-dimensional adjustment mechanism is used to adjust the position of the measuring instrument micrometer, and the alignment auxiliary device is used to ensure that the axis of the measuring instrument micrometer is aligned with the axis of the micrometer being tested. This application solves the problems of disassembly for testing, insufficient accuracy, and poor portability in the prior art, and is suitable for rapid traceability of wheel diameter measuring instruments in railway fields.

Description

Technical Field

[0001] This application belongs to the field of railway wheel diameter measurement technology, and specifically relates to a portable detection device for wheel diameter measuring micrometers. Background Technology

[0002] As a critical running gear component of locomotives and rolling stock, the diameter difference and rolling roundness of railway wheelsets directly affect vehicle traction performance, braking anti-skid control, and other safe operating indicators. Wheel diameter measuring instruments, as core metrological tools for controlling wheel diameter, must strictly adhere to national metrological verification regulations for traceability to ensure their accuracy and reliability. In railway field inspection scenarios, the need for rapid calibration and portability of wheel diameter measuring instruments is increasingly prominent, and the technological bottlenecks of traditional testing devices urgently need to be overcome.

[0003] Existing wheel diameter gauge testing technology has significant drawbacks. In terms of operation, traditional methods require disassembling the reading end of the gauge frame and the micrometer device, which contradicts the "no disassembly" requirement in field operations. Repeated disassembly and reassembly not only lead to variations in the indicated value error but also cause wear on the connecting structure. Actual measurements show that the indicated value error fluctuation after disassembly can reach ±0.03mm. Regarding measurement accuracy, the point contact method between the planar probe and the measured part introduces a contact error of ±0.05mm, and the lack of an axis alignment auxiliary device results in a coaxiality error exceeding ±0.1mm during manual calibration, making it difficult to meet the requirements for high-precision traceability.

[0004] In terms of adaptability and portability, existing tooling cannot be compatible with the tolerance difference of ±0.3mm in the main scale thickness of wheel diameter gauges from different manufacturers, and the average weight of the device exceeds 5kg, making it difficult to pass railway vibration tests and unable to meet the needs of mobile testing scenarios such as workshops and the field.

[0005] Therefore, there is an urgent need for a wheel diameter measuring micrometer device that can be used without disassembling the ruler frame, has high measurement accuracy, and is easy to carry, so as to achieve rapid on-site testing and improve operational convenience. Utility Model Content

[0006] The purpose of this application is to provide a portable testing device for wheel diameter measuring micrometers. This addresses the technical problems mentioned in the background art, such as the need to disassemble the measuring frame for wheel diameter measurement leading to variations in reading error, large contact error of the flat probe, and bulky tooling that is incompatible with different wheel diameter measuring gauges.

[0007] To achieve the above objectives, this application adopts the following technical solution:

[0008] A portable testing device for wheel diameter measuring micrometer is provided, comprising a portable positioning mechanism, a two-dimensional adjustment mechanism located on the portable positioning mechanism, a measuring micrometer device, and a centering auxiliary device;

[0009] The portable positioning mechanism includes a positioning base and a fixing component located on the positioning base;

[0010] The positioning base is provided with a gauge slot for placing the main scale of the wheel diameter gauge reading end. The main scale of the wheel diameter gauge reading end is fixed on the positioning base by a fastener.

[0011] The two-dimensional adjustment mechanism is mounted on the positioning base, and the micrometer device is mounted on the two-dimensional adjustment mechanism. The two-dimensional adjustment mechanism is used to adjust the position of the micrometer device, and the centering auxiliary device is used to ensure that the axis of the micrometer device is aligned with the axis of the micrometer being inspected.

[0012] In one possible implementation, the fastener includes at least one quick-release set screw and an anti-displacement fastening screw;

[0013] The quick-release set screw passes through the positioning base, and one end of the quick-release set screw extends into the gauge slot to press the main scale of the wheel diameter gauge reading end against the side wall of the positioning base.

[0014] The anti-displacement fastening screw passes through the positioning base, and one end of the anti-displacement fastening screw is used to press the main scale of the wheel diameter gauge reading end against the bottom wall of the positioning base.

[0015] In one possible implementation, the two-dimensional adjustment mechanism includes a Z-axis adjustable displacement component and a Y-axis adjustable displacement component;

[0016] The Z-axis adjustable displacement component is used to adjust the micrometer device of the gauge in the vertical direction;

[0017] The Y-axis adjustable displacement component is used to adjust the micrometer device of the gauge in the horizontal direction.

[0018] In one possible implementation, the Z-axis adjustable displacement component has a resolution of 0.001 mm and a measurement range of 70.0-70.4 mm.

[0019] In one possible implementation, the Y-axis adjustable displacement component has a stroke of ±15mm, and the Z-axis adjustable displacement component is adapted to a 5-8mm ruler frame.

[0020] In one possible implementation, the centering aid includes a coaxial retainer.

[0021] In one possible implementation, the coaxial retainer is adapted to a probe with a diameter of 5-8mm and a coaxiality calibration accuracy of ≤0.005mm, and is used to assist in aligning the axis of the micrometer device of the inspection fixture with the axis of the micrometer device being inspected.

[0022] In one possible implementation, the surface of the positioning base is anodized with a film thickness of 25 μm and a protection rating of IP54.

[0023] In one possible implementation, the micrometer device of the gauge adopts a circular probe structure, which forms point contact with the micrometer being tested, and the indication error is ≤ ±0.001mm.

[0024] In one possible implementation, the Z-axis adjustable displacement component and the Y-axis adjustable displacement component are made of aviation aluminum alloy hollow profiles with a wall thickness of ≤3mm and internal triangular reinforcing ribs.

[0025] Compared with the prior art, this application has the following beneficial effects:

[0026] This application provides a portable testing device for a wheel diameter measuring micrometer. The device achieves lightweight design through an aerospace-grade aluminum alloy hollow frame, reducing weight by 64% compared to traditional tooling. The T-shaped gauge slot and fixing component design allow for quick fixation of the main scale at the wheel diameter gauge reading end, avoiding structural wear and indication error variations caused by disassembly. The combination of the two-dimensional adjustment mechanism and the centering auxiliary device solves the problems of poor tooling compatibility and insufficient measurement accuracy in existing technologies, enabling rapid on-site testing of wheel diameter gauges of different specifications, improving testing efficiency by more than 50%.

[0027] In one possible implementation, the dual-fixing structure, through double clamping in both horizontal and vertical directions, controls the fixing error of the main scale at the wheel diameter gauge reading end within ±0.01mm, solving the displacement problem caused by traditional single-set screw fixing. The combination design of quick-release set screw and anti-displacement fastening screw ensures clamping efficiency while preventing damage to the main scale surface through elastic clamping components. Actual measurements show that the repeatability after clamping is ≤0.005mm, providing a stable foundation for subsequent precision measurements.

[0028] In one possible implementation, the two-dimensional adjustment mechanism achieves rapid compatibility with wheel diameter gauges of different specifications and precise adjustment of the probe position through the collaborative design of the Z-axis adjustable displacement component and the Y-axis adjustable displacement component. This not only meets the strict requirements of the verification procedure for the distance between the probe center and the positioning surface, but also improves the detection efficiency by 80% and reduces the tooling replacement cost by 70%, providing a stable and reliable solution for high-precision and rapid detection of wheel diameter gauges on railway sites.

[0029] In one possible implementation, the combination of Y-axis large stroke adjustment and Z-axis thickness adaptation can cover all sizes of wheel diameter gauges from various manufacturers, and also ensures the stability of the probe adjustment in the two-dimensional direction. This solves the problem that existing tooling cannot be compatible with multiple sizes of wheel diameter gauges, improves the device's versatility by 80%, and reduces the cost of replacing dedicated tooling.

[0030] In one possible embodiment, the centering aid may include a coaxial retainer.

[0031] In one possible implementation, anodizing treatment increases the wear resistance of the positioning base surface by 3 times and enhances its corrosion resistance, allowing it to adapt to a temperature range of -20℃ to 50℃ and humid workshop environments. An IP54 protection rating ensures the device can withstand dust and water intrusion during field testing, extending its service life, reducing maintenance costs by 30%, and meeting the needs of complex working conditions at railway sites. Attached Figure Description

[0032] Figure 1 A schematic diagram of the overall structure of a portable testing device for wheel diameter measuring micrometers provided in this application;

[0033] Figure 2 for Figure 1 A magnified view of a portion of the image.

[0034] The attached figures are labeled as follows: 1. Portable positioning mechanism; 11. Positioning base; 12. Fixing component; 13. Quick-release set screw; 14. Anti-displacement fastening screw; 2. Two-dimensional adjustment mechanism; 3. Micrometer device for inspection fixture; 4. Centering auxiliary device; 5. Main scale of wheel diameter gauge reading end; 6. Z-axis adjustable displacement assembly; 61. Vertical guide rail; 62. Vertical slider; 63. Vertical bolt; 7. Y-axis adjustable displacement assembly; 71. Horizontal guide rail; 72. Horizontal slider; 73. Horizontal bolt; 8. Micro-device being inspected. Detailed Implementation

[0035] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0036] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly defined. The specific embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0038] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0039] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] like Figure 1 and Figure 2 As shown, this application discloses a portable testing device for a wheel diameter measuring micrometer. The portable testing device for a wheel diameter measuring micrometer may include a portable positioning mechanism 1, a two-dimensional adjustment mechanism 2 located on the portable positioning mechanism 1, a measuring tool micrometer 3, and a centering auxiliary device 4.

[0042] The portable positioning mechanism 1 includes a positioning base 11 and a fixing member 12 located on the positioning base 11.

[0043] The positioning base 11 adopts an aviation aluminum alloy hollow frame structure and weighs 1.2kg.

[0044] The positioning base 11 is provided with a gauge slot for placing the main scale 5 of the wheel diameter gauge reading end. The main scale 5 of the wheel diameter gauge reading end is fixed on the positioning base 11 by a fastener 12.

[0045] Optionally, the gauge slot on the positioning base 11 is a T-slot structure, and the slot width is adapted to the width of the main scale 5 at the reading end of the wheel diameter gauge of various widths.

[0046] The two-dimensional adjustment mechanism 2 is mounted on the positioning base 11, and the micrometer device 3 is mounted on the two-dimensional adjustment mechanism 2. The two-dimensional adjustment mechanism 2 is used to adjust the position of the micrometer device 3, and the centering auxiliary device 4 is used to ensure that the micrometer device 3 is aligned with the axis of the micrometer device 8 being inspected.

[0047] In this embodiment, the device is lightweight by using an aerospace-grade aluminum alloy hollow frame, reducing its weight by 64% compared to traditional tooling. The T-shaped gauge slot and fixing component 12 design allows for quick fixation of the main scale 5 at the wheel diameter gauge reading end, avoiding structural wear and indication error variations caused by disassembly. The cooperation between the two-dimensional adjustment mechanism 2 and the centering auxiliary device 4 solves the problems of poor tooling compatibility and insufficient measurement accuracy in the prior art, enabling rapid on-site inspection of wheel diameter gauges of different specifications, improving inspection efficiency by more than 50%.

[0048] In one possible embodiment, the fastener 12 may include at least one quick-release set screw 13 and an anti-displacement fastening screw 14.

[0049] The quick-release set screw 13 passes through the positioning base 11, and one end of the quick-release set screw 13 extends into the gauge slot, which is used to press the main scale 5 of the wheel diameter gauge reading end against the side wall of the positioning base 11.

[0050] Optionally, the fastener 12 includes two M6 quick-release set screws 13 and one M8 anti-displacement fastening screw 14. The quick-release set screw 13 penetrates the upper surface of the positioning base 11, with a thread length of 25 mm, a front end nylon clamping block diameter of 10 mm, and a surface roughness Ra≤0.8μm.

[0051] The anti-displacement fastening screw 14 is installed through the positioning base 11. One end of the anti-displacement fastening screw 14 is used to press the main scale 5 of the wheel diameter gauge reading end against the bottom wall of the positioning base 11.

[0052] The anti-displacement fastening screw 14 is installed on the positioning base, with a thread length of 30mm, a bottom rubber pad diameter of 15mm, and a Shore A hardness of 50A. After the main scale 5 at the wheel diameter gauge reading end is placed into the gauge slot, first tighten the quick-release set screw 13 to a torque of 1.5 N•m, so that the side wall of the main scale abuts against the side wall of the slot of the positioning base 11, and then tighten the anti-displacement fastening screw 14 until the bottom wall of the main scale is tightly fitted with the bottom wall of the slot. The clamping time is ≤20 seconds.

[0053] In this embodiment, the double-fixing structure 12, through dual horizontal and vertical clamping, controls the fixing error of the main scale 5 at the wheel diameter gauge reading end within ±0.01mm, solving the displacement problem caused by traditional single-set screw fixing. The combination design of quick-release set screw 13 and anti-displacement fastening screw 14 not only ensures clamping efficiency but also avoids damage to the surface of the main scale through elastic clamping components. The measured repeatability accuracy after clamping the two-dimensional adjustment mechanism 2 is ≤0.005mm, providing a stable foundation for subsequent precision measurements.

[0054] In one possible embodiment, it may include a Z-axis adjustable displacement component 6 and a Y-axis adjustable displacement component 7.

[0055] The Z-axis adjustable displacement component 6 is used to adjust the micrometer device 3 of the gauge in the vertical direction.

[0056] Specifically, the Z-axis adjustable displacement assembly 6 may include a vertical guide rail 61, a vertical slider 62, and a vertical bolt 63.

[0057] The vertical guide rail 61 is a rectangular guide rail with a length of 100mm, and is vertically fixed to the side of the positioning base 11. The vertical slider 62 is slidably connected to the vertical guide rail 61, and the side wall of the vertical slider 62 is used to install the Y-axis adjustable displacement component 7.

[0058] The vertical bolt 63 is an M6 wing bolt. The vertical bolt 63 passes through the vertical slider 62 and abuts against the side of the vertical guide rail 61, thereby fixing the vertical slider 62 on the vertical slider 62.

[0059] Optionally, the stroke range of the vertical slider 62 can be adapted to various measurement needs of different thicknesses. By manually pushing the vertical slider 62 to slide on the vertical guide rail 61, it can be adapted to the frame thickness of different specifications of wheel diameter rulers.

[0060] The Y-axis adjustable displacement component 7 is used to adjust the micrometer device 3 of the gauge in the horizontal direction.

[0061] The Y-axis adjustable displacement assembly 7 may include a horizontal guide rail 71, a horizontal slider 72, and a horizontal bolt 73.

[0062] Optionally, the horizontal guide rail 71 is made of the same material as the vertical guide rail 61 and is fixed to the vertical slider 62. The horizontal guide rail 71 is 150mm long. The horizontal guide rail 71 is provided with a boss that matches the dovetail groove, and smooth sliding is achieved by ball bearings. The horizontal bolt 73 is an M5 lock nut, which can be tightened to fix the horizontal slider 72 at any position on the horizontal guide rail 71.

[0063] The micrometer device 3 is fixed to the top of the horizontal slider 72 by bolts.

[0064] Specifically, by adjusting the position of the horizontal slider 72 on the horizontal guide rail 71, the distance from the center of the probe of the micrometer device 3 to the positioning surface can be precisely controlled within the range of 70.0-70.4mm (in accordance with the requirements of JJG1081.1-2024), with a positioning accuracy of ±0.01mm.

[0065] In this embodiment, the two-dimensional adjustment mechanism 2, through the collaborative design of the Z-axis adjustable displacement component 6 and the Y-axis adjustable displacement component 7, achieves rapid compatibility with wheel diameter gauges of different specifications and precise adjustment of the probe position. It not only meets the strict requirements of the verification procedure for the distance between the probe center and the positioning surface, but also improves the detection efficiency by 80% and reduces the tooling replacement cost by 70%, providing a stable and reliable solution for high-precision and rapid detection of wheel diameter gauges on railway sites.

[0066] In one possible embodiment, the Z-axis adjustable displacement component 6 has a resolution of 0.001 mm and a measurement range of 70.0-70.4 mm.

[0067] The Z-axis adjustable displacement component 6 has a resolution of 0.001 mm, which is convenient for covering the main calibration range of the wheel diameter measuring micrometer, which is 70.0-70.4 mm.

[0068] In this embodiment, the Z-axis adjustable displacement component 6 achieves a submicron resolution of 0.001 mm and a precise measurement range of 70.0-70.4 mm. Through targeted range design and lightweight structure, it significantly enhances portability, improves the calibration efficiency of wheel diameter measuring tools by 60%, and extends environmental adaptability to -20℃~60℃, providing core technical support for high-precision inspection on railway sites.

[0069] In one possible embodiment, the Y-axis adjustable displacement component 7 has a stroke of ±15mm, and the Z-axis adjustable displacement component 6 is adapted to a ruler frame of 5-8mm.

[0070] Optionally, the Y-axis adjustable displacement component 7 adopts a T-shaped dovetail groove guide rail with a length of 150mm, a horizontal block travel of ±15mm, and is fixed by an M6 locking nut with a positioning accuracy of ±0.01mm.

[0071] The Z-axis adjustable displacement component 6 is a rectangular guide rail, suitable for ruler frame thicknesses of 5-8mm, with an adjustment step of 0.1mm, and a vertical wobble of ≤0.02mm after locking.

[0072] In this embodiment, the combination of Y-axis large stroke adjustment and Z-axis thickness adaptation can cover all sizes of wheel diameter gauges from various manufacturers, and also ensures the stability of the probe adjustment in the two-dimensional direction. This solves the problem that existing tooling cannot be compatible with multiple sizes of wheel diameter gauges, improves the versatility of the device by 80%, and reduces the cost of replacing special tooling.

[0073] In one possible embodiment, the centering aid 4 may include a coaxial retainer.

[0074] The coaxial retainer of the centering auxiliary device 4 can include three specifications of coaxial cylinders: Φ5mm, Φ6mm, and Φ8mm. The material is brass, with an inner diameter roundness error ≤0.002mm, a length of 30mm, and 1×45° chamfered inner holes at both ends. The outer wall of the coaxial cylinder is textured with anti-slip grooves for easy assembly and disassembly. The calibration accuracy is ≤0.005mm, and it is compatible with the probe diameters of the micrometer device 3 and the micrometer device 8 being tested.

[0075] In this embodiment, the coaxial retainer controls the coaxiality of the two micrometer axes to within 0.005mm through mechanical positioning, eliminating the manual alignment error found in the prior art. The wear resistance of the brass material and the high-precision internal hole machining ensure the reliability of coaxiality calibration during long-term use, making the measurement repeatability error ≤0.004mm, meeting the high-precision requirements for railway wheelset safety inspection.

[0076] In one possible embodiment, the coaxial retainer is adapted to a probe with a diameter of 5-8mm and a coaxiality calibration accuracy of ≤0.005mm, and is used to assist in aligning the axis of the micrometer device 3 of the inspection fixture with the axis of the micrometer device 8 being inspected.

[0077] The coaxial retainer is a Φ6mm brass coaxial cylinder with an inner diameter tolerance of H7, a roundness error of 0.002mm, and a coaxiality calibration accuracy of 0.005mm for the two-dimensional adjustment mechanism 2.

[0078] When in use, first put the coaxial retainer on the probe of the micrometer device 3 of the inspection fixture, move it so that the probe of the micrometer device 8 to be tested is inserted into the other end of the coaxial cylinder, and complete the axis calibration by observing the fit clearance between the coaxial cylinder and the two probes (≤0.01mm).

[0079] In this embodiment, the precision guiding function of the coaxial retainer solves the problem of the lack of an axis alignment auxiliary device 4 in the prior art, improving the alignment efficiency of the two micrometer axes by 60% and reducing the calibration time from 5 minutes to 30 seconds. The calibration accuracy of 0.005mm ensures the coaxiality of force transmission during measurement, avoiding additional errors caused by axis offset, and reducing the fluctuation range of measured indication error from ±0.03mm to ±0.008mm.

[0080] In one possible embodiment, the surface of the positioning base 11 is anodized with a film thickness of 25 μm and a protection level of IP54.

[0081] The positioning base 11 has an anodized surface with a 25μm thick oxide film, a hard black color, and an IP54 protection rating. The process involves sulfuric acid anodizing, followed by a sealing treatment. It has a salt spray resistance of ≥1000 hours and a surface hardness of ≥300HV.

[0082] In this embodiment, the anodizing treatment increases the wear resistance of the positioning base 11 by 3 times and enhances its corrosion resistance, making it adaptable to a temperature range of -20℃ to 50℃ and humid workshop environments. The IP54 protection rating ensures the device can withstand dust and water intrusion during field testing, extending its service life, reducing maintenance costs by 30%, and meeting the needs of complex working conditions at railway sites.

[0083] In one possible embodiment, the micrometer device 3 of the gauge adopts a circular probe structure, which forms point contact with the micrometer device 8 being tested, and the indication error is ≤ ±0.001mm.

[0084] Optionally, the micrometer device 3 of the gauge can be a Φ5mm tungsten carbide circular probe with a surface roughness Ra≤0.01μm, forming point contact with the micrometer device 8 being inspected. The probe is connected to the micrometer screw via a thread, and in conjunction with a 0.001mm resolution digital display device, the indication error is ≤±0.001mm, and the measuring force is controlled within 2-3N.

[0085] In this embodiment, the circular probe's point contact design reduces the contact error of traditional planar probes by 80%. Combined with a high-precision digital display device, the overall measurement accuracy is improved to ±0.001mm. The high hardness of the tungsten carbide material ensures that the probe remains wear-free during long-term use, and the constant 2-3N measuring force prevents deformation of the measured part. This solves the problems of large contact error and unstable measuring force in existing technologies, meeting the high-precision requirements for traceability of railway wheel diameter measuring instruments.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions for some or all of the technical features, do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A portable wheel diameter gauge micrometer device detection apparatus, characterized by, It includes a portable positioning mechanism (1), a two-dimensional adjustment mechanism (2) located on the portable positioning mechanism (1), a micrometer device (3) for measuring instruments, and a centering auxiliary device (4); The portable positioning mechanism (1) includes a positioning base (11) and a fixing member (12) located on the positioning base (11); The positioning base (11) is provided with a gauge slot for placing the main scale (5) of the wheel diameter ruler reading end. The main scale (5) of the wheel diameter ruler reading end is fixed on the positioning base (11) by a fastener (12). The two-dimensional adjustment mechanism (2) is set on the positioning base (11), and the micrometer device (3) is set on the two-dimensional adjustment mechanism (2). The two-dimensional adjustment mechanism (2) is used to adjust the position of the micrometer device (3), and the centering auxiliary device (4) is used to ensure that the micrometer device (3) is aligned with the axis of the micrometer device (8) being tested.

2. The wheel gage micrometer portable testing device of claim 1, wherein, The fastener (12) includes at least one quick-release set screw (13) and an anti-displacement fastening screw (14); The quick-release screw (13) is provided through the positioning base (11), and one end of the quick-release screw (13) is inserted into the gauge slot to press the main scale (5) of the wheel diameter gauge reading end against the side wall of the positioning base (11). The anti-displacement fastening screw (14) is installed through the positioning base (11), and one end of the anti-displacement fastening screw (14) is used to press the main scale (5) of the wheel diameter gauge reading end against the bottom wall of the positioning base (11).

3. The wheel gage micrometer portable testing device of claim 1, wherein, The two-dimensional adjustment mechanism (2) includes a Z-axis adjustable displacement component (6) and a Y-axis adjustable displacement component (7); The Z-axis adjustable displacement component (6) is used to realize the adjustment of the micrometer device (3) in the vertical direction; The Y-axis adjustable displacement component (7) is used to adjust the micrometer device (3) in the horizontal direction.

4. The wheel gage micrometer portable testing device of claim 3, wherein, The Z-axis adjustable displacement component (6) has a resolution of 0.001 mm and a measurement range of 70.0-70.4 mm.

5. The wheel gage micrometer portable testing device of claim 3, wherein, The Y-axis adjustable displacement component (7) has a stroke of ±15mm, and the Z-axis adjustable displacement component (6) is adapted to a 5-8mm ruler frame.

6. The wheel gage micrometer portable testing device of claim 1, wherein, The centering auxiliary device (4) includes a coaxial retainer.

7. The wheel gage micrometer portable testing device of claim 6, wherein, The coaxial fixture is compatible with probes of Φ5-Φ8mm and has a coaxiality calibration accuracy of ≤0.005mm. It is used to help align the axis of the micrometer device (3) of the inspection tool with the micrometer device (8) being inspected.

8. The wheel gage micrometer portable testing device of claim 4, wherein, The surface of the positioning base (11) is anodized, with a film thickness of 25μm and a protection level of IP54.

9. The wheel gage micrometer portable testing device of claim 5, wherein, The micrometer device (3) of the inspection tool adopts a circular probe structure and forms point contact with the micrometer device (8) being inspected, with an indication error of ≤ ±0.001 mm.

10. The wheel gage micrometer portable testing device of claim 3, wherein: The Z-axis adjustable displacement component (6) and the Y-axis adjustable displacement component (7) are made of aviation aluminum alloy hollow profile with a wall thickness of ≤3mm and a triangular reinforcing rib structure inside.

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