Mechanism for automatically measuring shaft runout

Abstract

The invention provides a mechanism for automatically measuring shaft runout, and relates to the technical field of industrial production and precision manufacturing. The mechanism for automatically measuring the shaft run-out comprises a shaft run-out horizontal translation unit, a shaft run-out vertical translation unit and a shaft run-out measuring unit, wherein the shaft run-out vertical translation unit is connected with the shaft run-out horizontal translation unit through a guide rail sliding block assembly; the shaft run-out measuring unit is installed on the shaft run-out vertical translation unit. According to the technology, by integrating the high-precision sensing unit, the high-speed computing control module and the flexible executing mechanism, full-process automatic closed-loop control over shaft jumping is achieved. The design objective of the method is to actively identify run-out deviation and timely correct the run-out deviation in the operation process of the shaft system, stably control the radial and axial run-out values of the shaft within a preset precision range, and reduce mechanical wear and energy loss at the same time.

Description

Technical Field

[0001] This invention relates to the field of industrial production and precision manufacturing technology, specifically to a mechanism for automatically measuring shaft runout. Background Technology

[0002] A mechanism for measuring axial runout is a device used to detect radial or axial runout errors in rotating shaft parts. It typically includes a fixed support structure, precision sensors (such as dial indicators, micrometers, or non-contact optical / laser probes), a data acquisition and processing system, and a motion control unit. Its core function is to capture the deviation between the actual trajectory of the shaft during rotation and its theoretical ideal trajectory through contact or non-contact methods. The main reason for measuring axial runout is to ensure the geometric accuracy, dynamic balance, and assembly quality of rotating components, which directly affects the smoothness, lifespan, and performance of mechanical equipment. For example, in fields such as precision machine tools, automotive engines, and aerospace components, even small runout errors can lead to increased vibration, accelerated wear, or even system failure. Therefore, accurate measurement can identify manufacturing defects early, optimize process parameters, and meet the intelligent requirements of full-process quality control, thereby improving product consistency and reliability.

[0003] In the fields of industrial production and precision manufacturing, as the manufacturing industry upgrades towards high precision, high capacity, and intelligent manufacturing, traditional product axis runout measurement methods have gradually revealed significant technical shortcomings, creating a prominent contradiction with the quality inspection needs of modern products throughout the entire process. Traditional product axis runout measurement mostly adopts a manual operation mode using contact measuring tools such as handheld dial indicators and micrometers. This mode not only cannot adapt to the high-speed production cycle of modern production lines, but is also prone to causing production line blockages due to efficiency bottlenecks in the inspection process, increasing the production turnover costs of enterprises. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an automatic mechanism for measuring shaft runout, which solves the problems of low efficiency, slow speed, reliance on manual accuracy, and difficulty in adapting to high-speed intelligent production lines in existing shaft runout measurement technologies.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a mechanism for automatically measuring shaft runout, comprising a horizontal translation unit for shaft runout, a vertical translation unit for shaft runout, and a shaft runout measuring unit.

[0006] The vertical translation unit for axis runout is connected to the horizontal translation unit for axis runout via a guide rail slider assembly; the axis runout measuring unit is mounted on the vertical translation unit for axis runout.

[0007] Preferably, the axis runout horizontal translation unit includes:

[0008] Base plate,

[0009] The first linear guide rail is fixedly mounted on the base plate.

[0010] The first guide rail slider slides in conjunction with the first linear guide rail.

[0011] The mounting plate is fixedly mounted on the upper surface of the first guide rail slider, and

[0012] Limiting blocks and stop blocks are mounted on the mounting plate.

[0013] Preferably, the axis runout vertical translation unit includes:

[0014] A connecting plate, which is fixedly connected to the mounting plate.

[0015] A support plate, which is vertically mounted on the connecting plate,

[0016] The second linear guide rail is fixedly mounted on the support plate.

[0017] The second guide rail slider slides in conjunction with the second linear guide rail and is connected to the shaft runout measuring unit.

[0018] An auxiliary support block, which is mounted on the connecting plate and fixedly connected to the support plate, and a limiting and fixing block mounted on the support plate.

[0019] Preferably, the shaft runout measurement unit includes:

[0020] The side plate is fixedly connected to the second guide rail slider.

[0021] The third linear guide rail is fixedly mounted on the side plate.

[0022] The third guide rail slider slides in conjunction with the third linear guide rail.

[0023] The cover plate is connected to the third guide rail slider.

[0024] A displacement sensor is mounted on the cover plate.

[0025] A cylinder, and a connecting shaft connected to the piston rod and cover plate of the cylinder.

[0026] The cylinder is mounted on the side plate via a cylinder fixing block.

[0027] Preferably, the displacement sensor is a contact displacement sensor or a non-contact displacement sensor, and the cylinder is a pen-shaped cylinder, a thin cylinder, or a heavy-duty cylinder.

[0028] Preferably, the cover plate is a customized cover plate, a standard cover plate, or a widened cover plate, and the connecting shaft is a standard connecting shaft or an extended connecting shaft.

[0029] Preferably, the mechanism is configured to be integrated alongside an automated production line, with the cylinder and displacement sensor connected to a programmable logic controller.

[0030] This invention provides a mechanism for automatically measuring shaft runout. It has the following advantages:

[0031] This invention provides an automatic shaft runout measurement mechanism. The device is divided into three independent functional units: horizontal translation, vertical translation, and measurement. Each unit can be assembled and debugged independently, and the units are connected by standardized guide rail sliders. This breaks through the limitations of the integrated structure of traditional shaft runout measurement devices, realizes the modular reconstruction and flexible adaptation of the measurement mechanism, and adopts a translation architecture with a combination of horizontal and vertical double linear guide rails to achieve precise displacement of the measurement unit in two-dimensional space. This solves the problems of low alignment accuracy and poor efficiency of traditional manual adjustment, and can be adapted to shafts with different diameters and different installation positions.

[0032] This invention provides a mechanism for automatically measuring shaft runout. The measuring unit of this technology integrates a retractable cylinder drive. The cylinder thrust drives the displacement sensor to smoothly approach and fit against the surface of the shaft being measured along the guide rail. It can adapt to the slight posture deviation of the shaft surface, while avoiding damage to the shaft and sensor caused by rigid contact. This solves the problems of easy jamming and scratching of the workpiece by traditional rigid measuring ends. Attached Figure Description

[0033] Figure 1 This is an overall schematic diagram of the present invention;

[0034] Figure 2 This is a schematic diagram of the axis runout horizontal translation unit of the present invention;

[0035] Figure 3 This is a schematic diagram of the axis runout horizontal translation unit of the present invention;

[0036] Figure 4 This is a schematic diagram of the axis runout vertical translation unit of the present invention;

[0037] Figure 5 This is a schematic diagram of the shaft runout measurement unit of the present invention.

[0038] The components include: 1. Axis runout horizontal translation unit; 11. Base plate; 12. First guide rail slider; 13. First linear guide rail; 14. Mounting plate; 15. Limiting block; 16. Stop block; 2. Axis runout vertical translation unit; 21. Connecting plate; 22. Second guide rail slider; 23. Auxiliary support block; 24. Support plate; 25. Limiting and fixing block; 26. Second linear guide rail; 3. Axis runout measurement unit; 31. Side plate; 32. Third linear guide rail; 33. Third guide rail slider; 34. Cover plate; 35. Displacement sensor; 36. Connecting shaft; 37. Cylinder fixing block; 38. Cylinder. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] like Figure 1-5 As shown, this embodiment of the invention provides a mechanism for automatically measuring shaft runout, including a horizontal translation unit 1 for shaft runout, a vertical translation unit 2 for shaft runout, and a shaft runout measuring unit 3.

[0041] The vertical translation unit 2 for axis runout is connected to the horizontal translation unit 1 for axis runout via a guide rail slider assembly; the axis runout measuring unit 3 is mounted on the vertical translation unit 2 for axis runout.

[0042] The axis runout horizontal translation unit 1 includes:

[0043] Base plate 11,

[0044] The first linear guide rail 13 is fixedly mounted on the base plate 11.

[0045] The first guide rail slider 12 is in sliding engagement with the first linear guide rail 13.

[0046] Mounting plate 14 is fixedly mounted on the upper surface of the first guide rail slider 12, and

[0047] Limiting block 15 and stop block 16 are mounted on mounting plate 14.

[0048] The axis runout vertical translation unit 2 includes:

[0049] Connecting plate 21, which is fixedly connected to mounting plate 14.

[0050] Support plate 24, which is vertically mounted on connecting plate 21.

[0051] The second linear guide 26 is fixedly mounted on the support plate 24.

[0052] The second guide rail slider 22 is in sliding engagement with the second linear guide rail 26 and is connected to the shaft runout measuring unit 3.

[0053] An auxiliary support block 23 is mounted on a connecting plate 21 and fixedly connected to a support plate 24, and a limiting and fixing block 25 is mounted on the support plate 24.

[0054] Shaft runout measurement unit 3 includes:

[0055] Side plate 31, which is fixedly connected to the second guide rail slider 22.

[0056] The third linear guide rail 32 is fixedly mounted on the side plate 31.

[0057] The third guide rail slider 33 slides in conjunction with the third linear guide rail 32.

[0058] Cover plate 34, which is connected to the third guide rail slider 33.

[0059] Displacement sensor 35 is mounted on cover plate 34.

[0060] Cylinder 38, and connecting shaft 36 connected to piston rod and cover plate 34 of cylinder 38.

[0061] The cylinder 38 is mounted on the side plate 31 via the cylinder fixing block 37.

[0062] The displacement sensor 35 can be a contact or non-contact displacement sensor, and the cylinder 38 can be a pen-shaped cylinder, a thin cylinder, or a heavy-duty cylinder. The cover plate 34 can be a customized cover plate, a standard cover plate, or a widened cover plate, and the connecting shaft 36 can be a standard connecting shaft or an extended connecting shaft. This technology is configured to be integrated alongside an automated production line, with the cylinder 38 and displacement sensor 35 connected to a programmable logic controller (PLC).

[0063] Axis runout horizontal translation unit 1: Base plate 11: The basic support component that supports the entire mechanism; First linear guide rail 13; First guide rail slider 12: Cooperates to achieve horizontal sliding and plays a guiding role; Mounting plate 14: The carrier that supports the vertical translation unit; Limiting block 15; Stop block 16: Limits the range of horizontal movement and avoids overtravel.

[0064] Vertical translation unit 2 with axis runout: Connecting plate 21: Transition piece connecting the horizontal unit and the vertical unit; Auxiliary support block 23; Support plate 24: Together support the vertical guide rail and measuring unit; Second linear guide rail 26: Cooperates with the slider to achieve vertical sliding and plays a guiding role; Limiting and fixing block 25: Limits the range of vertical movement.

[0065] Shaft runout measurement unit 3: Side plate 31: mounting base for measuring components; Third linear guide rail 32; Third guide rail slider 33: cooperates to realize the back-and-forth movement of the sensor and plays a guiding role; Cover plate 34: mounting carrier for displacement sensor 35; Displacement sensor 35: collects displacement data of shaft radial runout; Connecting shaft 36: transmits cylinder power and drives cover plate 34 to slide; Cylinder fixing block 37: support for fixing cylinder; Cylinder 38: provides power to push the sensor to fit against the measured shaft of the product being measured.

[0066] This invention's device is applicable to products with different shaft diameters. For example, in small shaft diameter scenarios: it is mainly suitable for inspecting parts such as precision motor shafts and micro reducer output shafts. A small displacement sensor 35 (detection distance 5mm) is used, paired with a pen-shaped cylinder 38. A customized cover plate 34 shortens the sensor installation distance, ensuring a detection accuracy of ±0.01mm. In medium shaft diameter scenarios: it is mainly suitable for inspecting parts such as automotive drive shafts and machine tool spindle intermediates. A medium displacement sensor 35 (detection distance 10mm) is used, paired with a thin cylinder 38. Installed with a standard cover plate 34, it is compatible with multiple shaft diameter specifications, achieving a measurement accuracy of ±0.02mm. In large shaft diameter scenarios: it is mainly suitable for inspecting parts such as engineering machinery drive shafts. A long-stroke displacement sensor 35 (detection distance 20mm) is used, paired with a heavy-duty cylinder 38. An extended connecting shaft 36 and a widened cover plate 34 ensure stable contact between the sensor and the measured shaft surface, achieving a measurement accuracy of ±0.02mm.

[0067] It can also adapt to different installation scenarios. It is mainly suitable for online inspection scenarios: integrated next to the production line conveyor, linked with the automated feeding mechanism, the cylinder 38 realizes the automatic contact / separation of the sensor through PLC control, and the displacement sensor 35 collects data in real time and uploads it to the MES system, which is suitable for full inspection of large batches of shaft parts.

[0068] Table 1: Comparison of Traditional Methods and This Technology

[0069] Comparison Dimensions Traditional measurement methods The design agency Damage risk Rigid contact can easily cause scratches on the shaft surface and wear on the sensor probe. Flexible contact, no risk of scratching the shaft surface / sensor Measurement efficiency Single measurement cycle ≥4.0s (requires manual adjustment of positioning or clearing of jams) The single measurement cycle is ≤2.5s (including bonding, data acquisition, and reset). Measurement accuracy Repeatability error ≤ ±0.08mm, measurement error ≤ ±0.1mm Repeatability error ≤ ±0.02mm, measurement error ≤ ±0.05mm Maintenance costs High maintenance costs (requires replacement of worn probes, repair of jamming mechanisms, and grinding of shaft surfaces). Low maintenance costs (only periodic cleaning of the guide rails is required). Device compatibility It is only compatible with specific models of contact sensors and has poor compatibility. It can integrate laser displacement sensors and inductive sensors, and supports PLC signal linkage.

[0070] The entire mechanism is installed on the side of the equipment. First, the base plate 11 of the horizontal translation unit 1 is assembled with the first linear guide rail 13 and the first guide rail slider 12. A mounting plate 14 with a limiting block 15 is mounted on the first guide rail slider 12. Then, the connecting plate 21 of the vertical translation unit 2 is fixed to the horizontal unit mounting plate 14, and auxiliary support block 23, vertical support plate 24, second linear guide rail 26, and second guide rail slider 22 are installed. Next, the side plate 31 of the axis runout measuring unit 3 is mounted on the second guide rail slider 22, and the third linear guide rail 32, cover plate 34, cylinder 38, and displacement sensor 35 are assembled and connected. Finally, it is installed in the designated position on the equipment. The specific steps are as follows:

[0071] Assembly of axis runout horizontal translation unit 1

[0072] Positioning and fixing of base plate 11: Attach the base plate 11 of the shaft runout horizontal translation unit 1 to the reserved mounting surface on the side of the equipment. Make a rough adjustment of the position through the holes on the base plate 11. Use a level to check the levelness of the base plate 11 to ensure that the longitudinal and transverse levelness errors are both ≤0.03mm / m. After the rough adjustment is qualified, tighten the fixing bolts with a torque wrench. Anti-loosening washers should be added to the bolt connection and a small amount of thread fastening glue should be applied to prevent vibration from loosening.

[0073] Installation of the first linear guide rail 13: The "two-point positioning method" is used for installation. First, gently pre-tighten the mounting bolts at both ends of the first linear guide rail 13. Then, attach the alignment block of the first linear guide rail 13 to the side of the first linear guide rail 13. Use a dial indicator to check the parallelism between the first linear guide rail 13 and the reference surface of the base plate 11, ensuring that the parallelism error is ≤0.02mm / m. After the alignment is qualified, gradually tighten the bolts in the order of "from the middle to both ends" to avoid deformation of the guide rail due to uneven force. The two first linear guide rails 13 of the same axis jump horizontal translation unit 1 must ensure equal height. Use a laser rangefinder to check the height difference between the top surfaces of the two guide rails; the error should be ≤0.01mm.

[0074] Assemble the first guide rail slider 12 with the mounting plate 14: Smoothly embed the first guide rail slider 12 into the first linear guide rail 13, ensuring that the slider slides smoothly without jamming and the sliding resistance is uniform (≤5N); Place the mounting plate 14 with the limit block 15 on the first guide rail slider 12, align the mounting holes and insert the bolts, pre-tighten first and then tighten in diagonal order to ensure that the mounting plate 14 and the first guide rail slider 12 fit tightly without loosening.

[0075] Install limit block 15: Adjust the installation position of limit block 15 according to the designed horizontal travel limit position, calibrate the limit distance with a laser rangefinder (error ≤ ±0.1mm), tighten the fixing bolts of limit block 15, manually push the mounting plate 14 to the limit positions at both ends, check the reliability of the limit, and ensure that there is no hard impact.

[0076] Preliminary lubrication: Inject an appropriate amount of special grease into the oil inlet of the first linear guide 13, spread it evenly, and manually push the mounting plate 14 back and forth ten to fifteen times to ensure that the grease evenly covers the mating surfaces of the guide rail and the slider.

[0077] Assembly of axis runout vertical translation unit 2

[0078] Fixing the connecting plate 21: Attach the connecting plate 21 of the vertical translation unit 2 to the mounting plate 14 of the horizontal translation unit 1, ensuring that the two surfaces are fully in contact (gap ≤ 0.02mm). After aligning the mounting holes, tighten the connecting bolts with a torque wrench. Install anti-loosening washers at the bolt connections and apply thread-locking adhesive if necessary.

[0079] Installation of auxiliary support block 23 and vertical support plate 24: First, fix the auxiliary support block 23 in the preset position of the connecting plate 21. Use a right-angle ruler to check the verticality of the auxiliary support block 23. The error should be ≤0.02mm / m. Tighten the fixing bolts. Place the vertical support plate 24 against the side of the auxiliary support block 23. Adjust the position of the support plate 24 to ensure that it is perpendicular to the horizontal base plate 11 (verticality error ≤0.03mm / m). Tighten the bolts in two steps: first pre-tighten and then tighten symmetrically to avoid deformation of the support plate 24.

[0080] Installation of the second linear guide rail 26: Refer to the installation method of the first linear guide rail 13 and install the second linear guide rail 26 in a "top-down" sequence. Use a dial indicator to check the parallelism between the guide rail and the reference plane of the vertical support plate 24. The error should be ≤0.02mm / m. Tighten the guide rail mounting bolts to ensure that the guide rail is firmly installed and there is no looseness. The two second linear guide rails 26 of the vertical translation unit 2 on the same axis must ensure coplanarity, and the height difference error should be ≤0.01mm.

[0081] Second guide rail slider 22 debugging: Embed the second guide rail slider 22 into the second linear guide rail 26, manually slide the slider to check the smoothness of sliding, and ensure that there is no jamming or abnormal noise.

[0082] Shaft runout measurement unit 3 assembly

[0083] Side plate 31 installation: Attach the side plate 31 of the shaft runout measuring unit 3 to the second guide rail slider 22 of the shaft runout vertical translation unit 2, align the mounting holes, pre-tighten the bolts, and use a right-angle ruler to check the perpendicularity of the side plate 31 to the horizontal direction (error ≤ 0.02 mm / m). After confirming that there is no error, tighten the bolts in diagonal order.

[0084] Internal component assembly:

[0085] Install the internal third linear guide 32: Fix the internal third linear guide 32 of the shaft runout measuring unit 3 according to the design position, ensuring that the guide is parallel to the side plate 31 (parallelism error ≤ 0.01mm / m), and tighten the fixing bolts;

[0086] Cover plate 34 installation: Cover the cover plate 34 over the internal third linear guide 32, align the mounting holes and gently tighten the bolts, leaving a gap of 0.1-0.2mm for heat dissipation, and avoid interference between the cover plate 34 and the internal components;

[0087] Cylinder 38 installation: Fix cylinder 38 to the preset position on side plate 31 using cylinder fixing block 37, adjust the installation angle of cylinder 38 to ensure that the piston rod of cylinder 38 is parallel to the internal third linear guide rail 32 (parallelism error ≤ 0.02mm); connect cylinder 38 air pipe, ensuring that the air pipe is not twisted or kinked, and the joint is firmly fixed with clamps to prevent air leakage;

[0088] Installation and connection of displacement sensor 35:

[0089] Fix the displacement sensor 35 on the cylinder mounting block 37, and adjust the distance between the sensor probe and the target to meet the detection range recommended by the sensor manufacturer (usually 2-10mm) to avoid damaging the sensor due to excessive tightness.

[0090] Connect the signal and power lines of displacement sensor 35 according to the electrical wiring diagram. Insulation treatment must be done at the connection points (wrapping with insulating tape or adding terminal blocks) to ensure that the wiring is secure and free from short circuits. Organize and fix the sensor cables to avoid interference between the cables and moving parts.

[0091] Overall installation and fixing

[0092] After verifying that each unit is assembled correctly, move the entire mechanism to the reserved installation position on the side of the equipment, and recalibrate the levelness and verticality of the mechanism (levelness error ≤ 0.03 mm / m, verticality error ≤ 0.04 mm / m).

[0093] Secure the base plate 11 to the equipment's pre-reserved mounting surface with high-strength bolts. All bolts must be fitted with anti-loosening washers and coated with thread-locking adhesive. Organize all cables and air pipes and secure them to the pre-set cable trays in the mechanism with cable ties to ensure that the cables and air pipes are neatly arranged and do not affect the stroke of each moving unit. Allow sufficient length of movement to accommodate the translational movement of the mechanism.

[0094] The specific working principle is as follows:

[0095] Horizontal position adjustment (axial runout horizontal translation unit 1): The first guide rail slider 12 of the axial runout horizontal translation unit 1 slides along the first linear guide rail 13 on the base plate 11, driving the axial runout vertical translation unit 2 and the axial runout measuring unit 3 above to move horizontally as a whole; the limit block 15 and the stop block 16 limit the range of movement, adjusting the axial runout measuring unit 3 to the horizontal position corresponding to the product being measured.

[0096] Vertical height adjustment (axis runout vertical translation unit 2): The second linear guide rail 26 of the axis runout vertical translation unit 2 is mounted on the support plate 24 and slides in cooperation with the guide rail slider corresponding to the side plate 31 of the connecting component of the axis runout measuring unit 3, thereby driving the axis runout measuring unit 3 to move vertically and adjust it to a vertical height that matches the axis of the product being measured, so that the axis runout measuring unit 3 is aligned with the axis being measured of the product being measured.

[0097] Measuring end fits against the shaft being measured (shaft runout measuring unit 3): After receiving a command, the cylinder 38 of the shaft runout measuring unit 3 moves and pushes the cover plate 34 through the connecting shaft 36, which slides along the third linear guide rail 32 on the side plate 31, thereby driving the displacement sensor 35 to move towards the product being measured, so that the detection end of the displacement sensor 35 fits against the surface of the shaft being measured.

[0098] Shaft runout detection: When the shaft under test rotates, the radial runout of the shaft will cause a displacement change at the detection end of the displacement sensor 35. The displacement sensor 35 collects the change data in real time, thereby completing the automatic measurement of shaft runout.

[0099] Reset / Switching Station: After the measurement is completed, the cylinder 38 that receives the command retracts, moving the displacement sensor 35 away from the measured axis of the product being measured; then the horizontal translation unit and the vertical translation unit are reset to their initial positions, waiting for the next measurement.

[0100] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mechanism for automatically measuring shaft runout, comprising a horizontal translation unit (1) for shaft runout, a vertical translation unit (2) for shaft runout, and a shaft runout measuring unit (3), characterized in that: The vertical translation unit (2) for axis runout is connected to the horizontal translation unit (1) for axis runout via a guide rail slider assembly; the axis runout measuring unit (3) is mounted on the vertical translation unit (2) for axis runout.

2. The mechanism for automatically measuring shaft runout according to claim 1, characterized in that: The axis runout horizontal translation unit (1) includes: Base plate (11) The first linear guide rail (13) is fixedly installed on the base plate (11). The first guide rail slider (12) slides in conjunction with the first linear guide rail (13). Mounting plate (14), which is fixedly mounted on the upper surface of the first guide rail slider (12), and Limiting block (15) and stop block (16) are mounted on the mounting plate (14).

3. The mechanism for automatically measuring shaft runout according to claim 2, characterized in that: The axis runout vertical translation unit (2) includes: A connecting plate (21) is fixedly connected to the mounting plate (14). A support plate (24) is vertically mounted on the connecting plate (21). The second linear guide (26) is fixedly mounted on the support plate (24). The second guide rail slider (22) slides with the second linear guide rail (26) and is connected to the shaft runout measuring unit (3). An auxiliary support block (23) is installed on the connecting plate (21) and fixedly connected to the support plate (24), and a limiting and fixing block (25) is installed on the support plate (24).

4. The mechanism for automatically measuring shaft runout according to claim 3, characterized in that: The shaft runout measurement unit (3) includes: Side plate (31), which is fixedly connected to the second guide rail slider (22), The third linear guide (32) is fixedly mounted on the side plate (31). The third guide rail slider (33) slides in conjunction with the third linear guide rail (32). The cover plate (34) is connected to the third guide rail slider (33). A displacement sensor (35) is mounted on the cover plate (34). Cylinder (38), and connecting shaft (36) connected to piston rod and cover plate (34) of cylinder (38). The cylinder (38) is mounted on the side plate (31) via a cylinder fixing block (37).

5. The mechanism for automatically measuring shaft runout according to claim 4, characterized in that: The displacement sensor (35) is a contact displacement sensor or a non-contact displacement sensor, and the cylinder (38) is a pen-shaped cylinder, a thin cylinder, or a heavy-duty cylinder.

6. The mechanism for automatically measuring shaft runout according to claim 4, characterized in that: The cover plate (34) is a customized cover plate, a standard cover plate, or a widened cover plate, and the connecting shaft (36) is a standard connecting shaft or an extended connecting shaft.

7. The mechanism for automatically measuring shaft runout according to any one of claims 1-6, characterized in that, The mechanism is configured to be integrated alongside an automated production line, with the cylinder (38) and displacement sensor (35) connected to a programmable logic controller.

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