Bearing axial clearance press fitting in-place measuring machine

Abstract

The invention relates to the technical field of measuring equipment, and provides a bearing axial clearance press-fitting in-place measuring machine, which comprises a supporting device fixedly arranged on the ground and used for providing a mounting foundation and stable support for the whole machine; the measuring devices are symmetrically arranged on the left side and the right side of the supporting device and used for conducting contact type measurement on the axial clearance and the press-fitting in-place size of the left side and the right side of the axle bearing; an axial positioning device which is connected with the supporting device and is used for carrying out axial positioning on the measured wheel shaft so as to prevent axial movement during measurement; the wheel discharging device is arranged at the tail end of the detection station of the supporting device and is used for pushing the wheel shaft out after the measurement is finished; and the electrical control system is electrically connected with the measuring device, the axial positioning device and the wheel discharging device respectively and is used for controlling cooperative work and data processing of all the components. The bearing axial clearance press fitting in-place measuring machine has the advantages of being accurate in measurement and high in automation level.

Description

Technical Field

[0001] This application relates to the technical field of measuring equipment, and in particular to a bearing axial clearance press-fit measuring machine. Background Technology

[0002] In the railway transportation sector, the axial clearance and press-fitting condition of wheel and axle bearings directly affect the operational safety of railway vehicles, thus requiring precise testing of relevant parameters. Existing technologies and equipment exist for measuring the axial clearance and press-fitting dimensions of railway freight car wheel and axle bearings. The core purpose of these technologies is to identify and eliminate substandard components by testing key bearing parameters, thereby preventing safety accidents caused by bearing assembly problems and ensuring the stable operation of railway transportation.

[0003] Current testing technologies typically employ manual or simple mechanical measurement methods. During the measurement process, the wheel / axle to be measured must be manually placed in the designated position, fixed by a manual positioning mechanism, and then a specialized measuring tool is used to contact the bearing's outer ring. The applied measuring force is manually controlled, and relevant bearing movement data is recorded to calculate axial clearance and press-fit dimensions. While some equipment has basic data recording functions, the overall process still relies on manual intervention; zeroing must be performed separately, and the measured wheel / axle must be manually removed from the testing station.

[0004] As can be seen from the above, existing testing technologies have many shortcomings. First, the high degree of human involvement leads to low measurement efficiency, and variations in human operation can easily introduce measurement errors, affecting the accuracy and consistency of test results. Second, the lack of reliable automatic positioning and anti-movement mechanisms means that wheel axle displacement may occur during measurement, further reducing measurement accuracy. Third, the zeroing and functional verification processes are cumbersome, making it difficult to ensure that the equipment remains in a precise working state over a long period, and the overall level of automation and testing reliability needs to be improved. Summary of the Invention

[0005] In view of this, this application aims to propose a bearing axial clearance press-fitting measurement machine to solve the above-mentioned technical problems and meet the requirements for automated high-precision detection of the axial clearance and press-fitting status of wheel and axle bearings.

[0006] To achieve the above objectives, the technical solution of this application is implemented as follows: The support device is fixedly installed on the ground to provide an installation foundation and stable support for the entire machine; The measuring device is symmetrically arranged on the left and right sides of the support device, and is used to perform contact measurement on the axial clearance and press-fit dimensions of the wheel axle bearing on the left and right sides. An axial positioning device, connected to the support device, is used to axially position the wheel axle being measured to prevent axial movement during measurement. A wheel ejection device is installed at the end of the testing station of the support device and is used to push the wheel axle out after the measurement is completed. The electrical control system is electrically connected to the measuring device, axial positioning device, and wheel-out device, respectively, and is used to control the coordinated operation of each component and data processing.

[0007] Furthermore, the support device includes a fuselage, columns, and crossbeams; The machine body, the column, and the crossbeam are fixedly connected by welding. The bottom of the machine body is provided with feet to adjust the overall height of the equipment and reduce external vibration interference.

[0008] Furthermore, the measuring device includes a force measuring component, a displacement measuring component, and a zeroing component; The force measuring component is used to collect and measure force values ​​in real time, the displacement measuring component is used to detect the displacement of the bearing outer ring, and the zeroing component includes standard samples symmetrically arranged on the left and right sides of the support device, as well as lifting cylinders that cooperate with the standard samples, for zeroing the equipment and verifying its functions.

[0009] Furthermore, the axial positioning device is hydraulically driven, using the inner side of the wheel rim as the positioning reference. The axial positioning device maintains its positioning state during the measurement process and automatically resets after the measurement is completed.

[0010] Furthermore, the wheel-exiting device includes multiple push wheels rotatably mounted on the support device. The push wheels are evenly distributed along the length of the support device and are used to push the measured wheel axle out of the testing station in the horizontal direction.

[0011] Furthermore, the electrical control system includes an industrial computer and supporting control modules, and is equipped with a Chinese operating interface based on the Windows platform. The electrical control system has self-locking and interlocking protection, emergency stop, overload protection, power failure protection and phase loss protection functions.

[0012] Furthermore, it also includes a pneumatic system, which includes a dual unit, a pressure regulating valve, an oil-water separator, and an oil mist lubricator; The main air circuit pressure of the pneumatic system is adjusted by the dual-unit assembly, and the working pressure of the measuring unit is controlled at 4-6 MPa by the pressure regulating valve.

[0013] Furthermore, the electrical control system supports manual input or barcode scanning to obtain workpiece information, has measurement data storage and printing output functions, and is equipped with a network interface that matches the HMIS system to realize remote uploading of measurement results and data sharing.

[0014] Compared with existing technologies, the bearing axial clearance press-fitting measuring machine proposed in this application has the following advantages: (1) This application provides a stable installation foundation for the whole machine through the support device. The measuring device is symmetrically arranged and is equipped with force measuring components, displacement measuring components and zeroing components to carry out contact measurement. The axial positioning device achieves accurate positioning by hydraulic drive and maintains the positioning state during the measurement process. The wheel-pushing device pushes the wheel axle in the horizontal direction through evenly distributed pushing wheels. The reasonable design and coordinated cooperation of these core components achieve the effects of stable equipment operation, accurate and reliable measurement, and smooth and efficient wheel axle pushing.

[0015] (2) The support device of this application provides a stable installation foundation for the whole machine. The measuring device is symmetrically arranged and is equipped with force measuring components, displacement measuring components and zeroing components to carry out contact measurement. The axial positioning device is hydraulically driven to achieve accurate positioning and maintain the positioning state during the measurement process. The wheel-pushing device pushes the wheel axle in the horizontal direction through evenly distributed pushing wheels. The reasonable design and coordinated cooperation of these core components have achieved the effects of stable equipment operation, accurate and reliable measurement, and smooth and efficient wheel axle pushing.

[0016] (3) This application uses a pneumatic system including components such as a dual unit, pressure regulating valve, oil-water separator and oil mist lubricator to reasonably adjust the main air circuit pressure and accurately control the working pressure of the measuring unit. At the same time, through timely removal of accumulated water, addition of lubricating oil, regular cleaning or replacement of filter elements and other maintenance operations, the pneumatic components are stabilized, wear is reduced, and the overall reliability and service life of the equipment are improved. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the bearing axial clearance press-fitting measuring machine described in the embodiments of this application.

[0018] Explanation of reference numerals in the attached figures: 1. Support device; 2. Measuring device; 3. Axial positioning device; 4. Wheel delivery device; 5. Electrical control system; 6. Pneumatic system; 101. Body; 102. Column; 103. Crossbeam; 104. Foot; 201. Force measuring component; 202. Displacement measuring component; 203. Zeroing component; 2031. Standard sample; 2032. Lifting cylinder; 401. Push wheel. Detailed Implementation

[0019] To make the technical solution and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0021] Furthermore, it should be noted that in the description of this application, if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and 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 on this application. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] Furthermore, in the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.

[0023] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0024] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0025] This application provides a bearing axial clearance press-fitting measuring machine, which is applied in the technical field of measuring equipment.

[0026] In existing technologies, manual or simple mechanical measurement methods are typically used. During the measurement process, the wheel / axle to be measured must be manually placed in the designated position, the wheel / axle is fixed by manually operating the positioning mechanism, and then a special measuring tool is used to contact the outer ring of the bearing. The applied measuring force is manually controlled, and relevant bearing movement data is recorded, thereby calculating the axial clearance and press-fit dimensions. Although some equipment has basic data recording functions, the overall process still relies on manual intervention; zeroing must be performed separately, and the wheel / axle must be manually removed from the testing station after measurement.

[0027] As can be seen from the above, existing testing technologies have many shortcomings. First, the high degree of human involvement leads to low measurement efficiency, and variations in human operation can easily introduce measurement errors, affecting the accuracy and consistency of test results. Second, the lack of reliable automatic positioning and anti-movement mechanisms means that wheel axle displacement may occur during measurement, further reducing measurement accuracy. Third, the zeroing and functional verification processes are cumbersome, making it difficult to ensure that the equipment remains in a precise working state over a long period, and the overall level of automation and testing reliability needs to be improved.

[0028] In view of this, and to overcome the shortcomings of the existing technology, this embodiment proposes a bearing axial clearance press-fitting measuring machine. (Refer to...) Figure 1 The bearing axial clearance press-fit measurement machine is equipped with a support device 1, which is fixed to the ground and provides a mounting foundation for all components, ensuring the overall stability of the equipment. The equipment is equipped with a measuring device 2, symmetrically arranged on both sides of the support device 1. This device uses a contact measurement method and is specifically designed to measure the axial clearance and press-fit dimensions of the wheel axle bearings. An axial positioning device 3 is connected to the support device 1; its core function is to axially position the wheel axle under test, preventing axial movement during measurement. A wheel ejection device 4 is installed at the end of the testing station on the support device 1. After measurement, it pushes the wheel axle out of the testing station. An electrical control system 5 is electrically connected to the measuring device 2, axial positioning device 3, and wheel ejection device 4. This system controls the components to work collaboratively according to a preset process and processes various data generated during the measurement process.

[0029] Support device 1 provides a stable and reliable installation foundation for the entire machine, ensuring the installation accuracy and operational stability of each working component; the symmetrically arranged measuring device 2 can fully cover the measurement needs on both sides of the wheel axle bearing, and the contact measurement method directly acts on the measured object, laying the foundation for the accuracy of the measurement results; the axial positioning device 3 effectively avoids the axial movement of the wheel axle during the measurement process, eliminating measurement errors caused by position changes; the wheel ejection device 4 realizes the automatic pushing of the wheel axle after the measurement is completed, reducing manual intervention; the electrical control system 5 coordinates the control of each component, ensuring the orderly progress of the measurement process, and the data processing function ensures the effective conversion of measurement data. The overall structural design enables the equipment to efficiently and accurately complete the measurement of bearing axial clearance and press-fit dimensions, improving the reliability and stability of the inspection.

[0030] Reference Figure 1 The support device 1 includes a body 101, a column 102, and a crossbeam 103. The body 101, column 102, and crossbeam 103 are fixedly connected by welding, which allows the components to be tightly integrated into a whole. A foot 104 is provided at the bottom of the body 101. The foot 104 can be used to adjust the overall height of the equipment and also to reduce the interference of external vibrations on the equipment.

[0031] The welded connection method gives the support device 1 a strong and rigid structure, enabling it to withstand various forces generated during equipment operation and preventing measurement accuracy from being affected by structural loosening. The height adjustment function of the feet 104 ensures that the equipment is at a level and suitable working height, meeting the installation requirements under different working conditions; its function of reducing external vibration interference reduces the impact of the external environment on the measurement process, allowing the equipment to maintain a stable working state even in complex environments, further ensuring the accuracy of the measurement results.

[0032] Reference Figure 1The measuring device 2 has a symmetrical structure and is assembled on both sides of the support device 1. It consists of a force measuring component 201, a displacement measuring component 202, and a zeroing component 203. The force measuring component 201 has a built-in pressure sensor, a force transmission rod, and a force adjustment mechanism. The pressure sensor is fixed to the end of the force transmission rod and can sense the force changes during the measurement process in real time and convert them into a recognizable electrical signal. The force transmission rod is made of high-strength wear-resistant material and can smoothly transmit the measuring force to the outer ring of the bearing. The adjustment mechanism is used to adjust the position of the force transmission rod to adapt to the measurement force requirements under different working conditions and ensure that the measured force always meets the preset standard. The displacement measuring component 202 is equipped with a high-precision displacement sensor and a contact measuring probe. The measuring probe is connected to the sensor through an elastic bracket. The probe end adopts a wear-resistant contact head design, which can fit tightly with the outer ring of the bearing. When the outer ring of the bearing moves axially, the displacement sensor can capture the position change of the probe in real time and accurately record the displacement data, providing direct raw data support for the calculation of axial clearance and press-fit dimensions. The calibration component 203 includes a standard sample 2031 and a lifting cylinder 2032. The standard sample 2031 adopts a contour-following design consistent with the structure of the bearing being measured. It is symmetrically installed on the left and right sides of the support device 1 via a fixed bracket. The cylinder body of the lifting cylinder 2032 is fixed on the frame of the support device 1. The top of the piston rod is rigidly connected to the fixed bracket of the standard sample 2031. With the extension and retraction of the cylinder, the bracket can be driven to smoothly lift and lower the standard sample 2031, so that it accurately reaches the calibration position consistent with the height of the measurement station. This completes the daily zeroing operation and functional verification of the equipment, ensuring the stability of the measurement benchmark.

[0033] The force measuring component 201 collects the measured force value in real time and can promptly report changes in the measured force to ensure the stability of the force during the measurement process and avoid the influence of force fluctuations on the measurement results. The displacement measuring component 202 accurately detects the displacement of the bearing outer ring, providing accurate basic data for subsequent data calculation. The zeroing component 203, through the cooperation of the standard sample 2031 and the lifting cylinder 2032, regularly zeros and verifies the function of the equipment, which can eliminate systematic errors that may occur during long-term use of the equipment and ensure that the equipment is always in a precise measurement state. The three components work together to significantly improve the measurement accuracy and reliability of the measuring device 2.

[0034] Reference Figure 1The axial positioning device 3 uses a hydraulic system as its power core and consists of a hydraulic pump, hydraulic cylinder, piston rod, positioning block, guide mechanism, and solenoid directional valve. The hydraulic pump is connected to the hydraulic cylinder via hydraulic lines, providing continuous power for the positioning action. The hydraulic cylinder is vertically mounted on both sides of the body 101 of the support device 1. A positioning block is fixedly installed at the end of the piston rod. The contact surface of the positioning block adopts an arc-shaped structure adapted to the inner surface of the wheel rim, ensuring a tight fit. A guide sleeve is provided on the outside of the hydraulic cylinder to guide the extension and retraction of the piston rod, preventing deviation during extension and retraction and ensuring positioning accuracy. The solenoid directional valve is electrically connected to the electrical control system 5 to control the flow of hydraulic oil, realizing the extension and retraction of the piston rod.

[0035] During operation, once the axle is pushed to the testing station and measurement is initiated, the electrical control system 5 sends a signal to the solenoid directional valve. The pressurized oil output from the hydraulic pump enters the rodless chamber of the hydraulic cylinder through the pipeline, pushing the piston rod to extend the positioning block towards the axle until the arc-shaped contact surface of the positioning block is fully engaged with the inner surface of the wheel rim, forming a reliable axial positioning. During the measurement process, the hydraulic system maintains a stable pressure, ensuring the positioning block remains firmly against the inner surface of the wheel rim, effectively limiting the axial movement of the axle.

[0036] Once the measurement is complete, the electrical control system 5 sends a reset signal, the solenoid directional valve switches the oil circuit, and pressurized oil enters the rod chamber of the hydraulic cylinder, pushing the piston rod to retract the positioning block in the opposite direction, returning it to its initial position, preparing for the next wheel axle positioning. The entire structure ensures the stability and accuracy of the positioning process through the stable output of hydraulic power, the adaptive design of the positioning block and the inner surface of the wheel rim, and the precise guidance of the guiding mechanism.

[0037] Hydraulic drive provides continuous and stable positioning force, ensuring the reliability of the positioning process and preventing wheel and axle displacement due to insufficient positioning force. Using the inner side of the wheel rim as the positioning reference, this clear and fixed reference ensures positioning accuracy, maintaining consistency in the reference for each measurement and reducing measurement errors caused by reference deviations. Maintaining the positioning state during measurement effectively prevents wheel and axle position changes, ensuring the accuracy of measurement data; automatic reset after measurement simplifies the operation process, eliminating the need for manual intervention and improving the ease of operation and work efficiency of the equipment.

[0038] Reference Figure 1 The wheel-output device 4 includes multiple push wheels 401, which are rotatably mounted on the support device 1 and evenly distributed along the length of the body 101 of the support device 1. After the measurement is completed, the push wheels 401 generate driving force by rotating, pushing the measured wheel axle out of the inspection station in a horizontal direction.

[0039] Multiple evenly distributed push wheels 401 ensure that the axle receives a uniform driving force during the pushing process, preventing tilting, offset, or surface damage caused by uneven force distribution, thus protecting the axle's integrity. The horizontal pushing method conforms to the axle's placement and movement requirements, making the pushing process smooth and stable, reducing resistance. The automatic pushing function replaces manual handling, saving labor costs and avoiding the inefficiencies and safety hazards associated with manual handling. This makes the entire inspection process more seamless and significantly improves overall inspection efficiency.

[0040] Reference Figure 1 The electrical control system 5 consists of an industrial computer and supporting control modules. It features a Chinese user interface based on the Windows platform, which is simple and intuitive, facilitating various operations for operators. Furthermore, the electrical control system 5 is equipped with multiple protection functions, including self-locking interlock protection, emergency stop, overload protection, power failure protection, and phase loss protection, comprehensively ensuring the safety of equipment operation and operators.

[0041] The combination of the industrial computer and its supporting control modules provides a stable and powerful operating foundation for the electrical control system 5, ensuring that control commands to each component are accurately and promptly transmitted and executed. The Chinese user interface conforms to the usage habits of domestic operators, reducing operational difficulty and the probability of operational errors. Multiple protection functions form a comprehensive safety protection system. When the equipment experiences self-locking or interlocking abnormalities, overload, power failure, phase loss, or other emergencies, the protection mechanism can be activated promptly to stop equipment operation, preventing further damage due to faults, ensuring operator safety, extending equipment lifespan, and improving the safety and reliability of equipment operation.

[0042] Reference Figure 1 The equipment is also equipped with a pneumatic system 6, which includes components such as a dual-unit assembly, a pressure regulating valve, an oil-water separator, and an oil mist lubricator. The pressure of the main air path is adjusted via the dual-unit assembly to meet the overall pressure requirements of the equipment. The working pressure of the measuring section is controlled by the pressure regulating valve to ensure that the air pressure in the measuring section meets the requirements of the measurement work. During equipment use, it is necessary to promptly remove accumulated water from the oil-water separator, add appropriate lubricating oil to the oil mist lubricator, and regularly clean or replace the filter element.

[0043] The components of pneumatic system 6 have clearly defined functions and work collaboratively. The dual-unit system can precisely adjust the main air circuit pressure, and the pressure regulating valve can stably control the working pressure of the measuring section, ensuring that each pneumatic component of the equipment receives appropriate air pressure and guarantees its normal operation. The oil-water separator can separate moisture and impurities from the compressed air, preventing moisture and impurities from entering the pneumatic components and causing corrosion or blockage. The oil mist lubricator provides lubrication for the pneumatic components, reducing friction and wear between components and extending their service life. Regular maintenance of relevant components can further ensure the cleanliness and lubrication effect of pneumatic system 6, enabling it to maintain a stable operating state over a long period of time. This provides reliable support for the normal operation of the entire equipment, improving its overall reliability and service life.

[0044] The electrical control system 5 supports obtaining workpiece information via manual input or barcode scanning, offering flexibility and convenience that can be selected based on actual usage scenarios and requirements. Simultaneously, the electrical control system 5 features measurement data storage and printing capabilities, effectively storing various data generated during the measurement process and outputting test results in print format as needed. Furthermore, the electrical control system 5 is equipped with a network interface compatible with the HMIS system, enabling remote uploading and data sharing of measurement results.

[0045] Multiple workpiece information acquisition methods adapt to different work scenarios. Manual input addresses situations where barcode scanning is inconvenient or unavailable, while barcode scanning is faster and more efficient, reducing input time and errors. Data storage facilitates the tracing, querying, and analysis of historical measurement data, providing data support for subsequent equipment maintenance and quality control. Printing output provides paper copies of inspection results, meeting archiving and verification needs. Networking with the HMIS system enables remote uploading and sharing of measurement data, allowing railway vehicle system administrators to access inspection data promptly. This, combined with the computerized network management of the railway vehicle system, improves management convenience and efficiency, while providing comprehensive and timely data support for railway vehicle operation safety.

[0046] The above descriptions are merely some embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A bearing axial clearance press-fitting measuring machine, characterized in that, include: The support device (1) is fixedly installed on the ground to provide an installation foundation and stable support for the whole machine; The measuring device (2) is symmetrically arranged on the left and right sides of the support device (1) for contact measurement of the axial clearance and press-fit dimensions of the wheel axle bearing on the left and right sides; The axial positioning device (3) is connected to the support device (1) and is used to axially position the wheel axle being measured to prevent axial movement during measurement. The wheel-out device (4) is installed at the end of the detection station of the support device (1) and is used to push the wheel axle out after the measurement is completed; The electrical control system (5) is electrically connected to the measuring device (2), the axial positioning device (3), and the wheel-out device (4) respectively, and is used to control the coordinated operation of each component and data processing.

2. The bearing axial clearance press-fitting measuring machine according to claim 1, characterized in that, The support device (1) includes a fuselage (101), a column (102), and a crossbeam (103); The body (101), the column (102) and the crossbeam (103) are fixedly connected by welding. The bottom of the body (101) is provided with feet (104) to adjust the overall height of the equipment and reduce external vibration interference.

3. The bearing axial clearance press-fitting measuring machine according to claim 1, characterized in that, The measuring device (2) includes a force measuring component (201), a displacement measuring component (202), and a zeroing component (203); The force measuring component (201) is used to collect and measure force values ​​in real time. The displacement measuring component (202) is used to detect the displacement of the outer ring of the bearing. The zeroing component (203) includes standard samples (2031) symmetrically arranged on the left and right sides of the support device (1) and lifting cylinders (2032) that cooperate with the standard samples (2031) for zeroing the equipment and verifying its functions.

4. The bearing axial clearance press-fitting measuring machine according to claim 1, characterized in that, The axial positioning device (3) is hydraulically driven and uses the inner side of the wheel rim as the positioning reference. The axial positioning device (3) maintains the positioning state during the measurement process and automatically resets after the measurement is completed.

5. A bearing axial clearance press-fitting measuring machine according to claim 1, characterized in that, The wheel-exiting device (4) includes multiple push wheels (401) rotatably mounted on the support device (1). The push wheels (401) are evenly distributed along the length of the body (101) of the support device (1) and are used to push the measured wheel axle out of the testing station in the horizontal direction.

6. A bearing axial clearance press-fitting measuring machine according to claim 1, characterized in that, The electrical control system (5) includes an industrial computer and a supporting control module. It is equipped with a Chinese operation interface based on the Windows platform. The electrical control system (5) is equipped with self-locking interlock protection, emergency stop, overload protection, power failure protection and phase loss protection functions.

7. A bearing axial clearance press-fitting measuring machine according to claim 1, characterized in that, It also includes a pneumatic system (6), which includes a dual unit, a pressure regulating valve, an oil-water separator, and an oil mist lubricator; The main air pressure of the pneumatic system (6) is adjusted by the dual-unit, and the working pressure of the measuring unit is controlled at 0.4-0.6MPa by the pressure regulating valve.

8. A bearing axial clearance press-fitting measuring machine according to claim 1, characterized in that, The electrical control system (5) supports manual input or barcode scanning to obtain workpiece information, has measurement data storage and printing output functions, and is equipped with a network interface that matches the HMIS system to realize remote uploading of measurement results and data sharing.

Images