Motor shaft precision detection grinding machine automatic detection device

Abstract

The utility model provides a kind of grinder automatic detection device for motor shaft precision detection belongs to motor shaft machining production technical field, it solves the technical problem that current grinder automatic detection device cannot carry out synchronous detection when motor shaft grinder machining, and automatically retreats after polishing in place.A kind of grinder automatic detection device for motor shaft precision detection, including rack, chuck rotationally connected in the top of rack and be used for driving chuck drive motor.In the utility model, through the sliding setting of support on the surface of rack, then make support can drive grinding wheel in tailstock and chuck between different positions to motor shaft polishing, ensure the flexibility of device, and by the vertical plate of internal penetration telescopic setting in support, under the action of marker rod and pressing plate, then make user can adjust the height of marker rod and pressing plate according to polishing amount, then make detection plate can synchronously drive gear column and electric push rod under the elastic action of telescopic spring.

Description

Technical Field

[0001] This utility model belongs to the field of motor shaft processing technology, and relates to a motor shaft detection device, particularly an automatic detection device for a grinding machine for detecting the precision of a motor shaft. Background Technology

[0002] Grinding machines are machine tools that use grinding wheels to grind the surface of workpieces. When machining motor shafts, external cylindrical grinding machines are usually used. External cylindrical grinding machines can process various cylindrical and conical outer surfaces as well as shaft shoulder end faces. As the core rotating component of a motor, the motor shaft has very strict requirements for dimensional accuracy and geometric tolerances. Currently, the inspection method after precision grinding of motor shafts is usually offline inspection, which requires manual removal of the machined motor shaft from the grinding machine and transfer to a coordinate measuring machine or other special inspection tools for measurement, resulting in low work efficiency.

[0003] A search revealed an automatic measuring device for a grinding machine disclosed in Chinese patent literature [Application No.: CN202322075814.9; Publication No.: CN220993979U]. This automatic measuring device for a grinding machine includes a housing, with a first motor fixedly connected to one side of the housing. The output end of the first motor extends into the housing and is fixedly connected to a reciprocating lead screw. This automatic measuring device for a grinding machine controls the starting of the first motor, the first electric telescopic rod, and the second motor. The first electric telescopic rod pushes the moving plate downward, placing the grinding head and the directional wheel against the object to be ground. The directional wheel pushes the sliding rod upward, thereby causing the pointer to move upward. The value indicated by the pointer is observed. The second motor drives the grinding head to rotate, thereby grinding the object to be ground.

[0004] Although the automatic measuring device for grinding machines disclosed in this patent can uniformly grind the object being ground by means of a pointer during grinding, in the production of motor shafts, it is necessary to observe the motor shaft at all times during grinding. It is impossible to automatically retract the tool when the grinding is in place, which makes the motor shaft prone to over-grinding and inaccurate grinding, seriously affecting the production efficiency of motor shafts. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing an automatic grinding machine detection device for motor shaft precision detection. The technical problem this invention aims to solve is: how to achieve synchronous detection of the motor shaft during grinding and automatic tool retraction after grinding is completed.

[0006] The objective of this utility model can be achieved through the following technical solutions: An automatic grinding machine inspection device for motor shaft precision inspection includes a frame, a chuck rotatably connected to the top of the frame, and a drive motor for driving the chuck. A support is slidably connected to the outer wall of the frame, and the support is located on one side of the chuck. A vertical plate is provided through the interior of the support, and a detection plate is fixedly installed at the top of the vertical plate. Two vertical plates are arranged in parallel, and a telescopic spring is provided between the two vertical plates. The bottom end of the telescopic spring is fixedly installed on the surface of the support, and the top end of the telescopic spring is fixedly installed on the bottom end of the detection plate. Side plates are fixedly installed on both outer walls of the vertical plates, and the side plates are located above the support. A marking rod is provided through the interior of the side plate, and the outer wall of the marking rod is provided with scale lines. A locking nut is threaded to the outer wall of the marking rod and is located on the surface of the side plate. A gear column is rotatably connected to the lower part of the support, and a marking rod is movably inserted into one side of the gear column's tooth groove. A rack is meshed with the outer wall of the gear column, and the rack is slidably connected to the columns on both sides of the support. A connecting plate is fixedly installed at the outer end of the rack, and a support is fixedly installed on the surface of the connecting plate. A grinding wheel is rotatably connected above the support, and a servo motor for driving the grinding wheel is fixedly installed on the outer side of the support. The grinding wheel is located on one side of the detection plate.

[0007] Using the above structure, the motor shaft is fixed between the chuck and the tailstock. Under the action of the drive motor, the chuck ensures that the motor shaft rotates during grinding. Furthermore, the tailstock, through the action of the first lead screw and the guide rail, can fix motor shafts of different lengths, ensuring the flexibility of the grinding machine. Before grinding, the electric push rod drives the connecting plate to compress the return spring, facilitating the support to drive the grinding wheel to grind the outer wall of the motor shaft. Simultaneously, a marking rod marks the grinding amount, allowing the marking rod to be inserted into the gear column at the corresponding grinding height. The marking rod is then fixed with a lock nut, ensuring it is securely attached to the vertical plate. Under the elastic action of the telescopic spring, the detection plate remains in contact with the bottom end of the motor shaft. Simultaneously, by rotating... The hand-tightening screw at the bottom of the pressure plate allows the pressure plate to be synchronously adjusted to the corresponding grinding distance below the press switch. Then, the grinding wheel is activated to grind the motor shaft. After the motor shaft is ground to the desired position, the detection plate moves upward under the elastic action of the telescopic spring, causing the corresponding height marker rod to move upward synchronously. This prevents the marker rod from limiting the gear column, allowing the connecting plate to be pressed outward under the elastic action of the return spring. To ensure the driving effect of the connecting plate, the pressure plate connected to the bottom of the vertical plate presses the press switch synchronously when the vertical plate moves upward. Through the electrical connection between the press switch and the electric push rod, the electric push rod pushes the connecting plate outward, enabling the connecting plate to drive the grinding wheel to retract via the support, thus avoiding over-grinding of the motor shaft.

[0008] The first lead screw is rotatably mounted inside the frame. A tailstock is mounted on the outer wall of the first lead screw via a ball nut. A guide rail is slidably connected to the bottom end of the tailstock. The guide rail is fixedly installed inside the frame and is parallel to the first lead screw. The first handwheel is fixedly installed at the outer end of the first lead screw, and the first handwheel is located on the outside of the frame.

[0009] With the above structure, the user can drive the first lead screw to rotate through the first handwheel, which in turn moves the tailstock on the outer wall of the first lead screw. The guide rail ensures the accuracy of the tailstock's movement. Specifically, the tailstock and the chuck are set coaxially, which ensures the stability and concentricity of the chuck and tailstock in clamping the motor shaft, thus improving the machining accuracy of the motor shaft.

[0010] The frame is internally rotatably connected to a second lead screw, which is parallel to the first lead screw. The outer wall of the second lead screw is connected to a support via a ball nut, and the support is slidably connected to the outer wall of the frame. The outer end of the second lead screw is fixedly connected to a second handwheel, and the second handwheel is located on the outside of the frame.

[0011] With the above structure, the second lead screw allows the support to slide precisely under the frame. At the same time, a groove is provided inside the support to facilitate sliding and guiding the groove on the outer wall of the frame, achieving a precise guiding effect for the support's movement path. This allows the support to drive the grinding wheel to process the motor shaft at different positions between the tailstock and the chuck via the connecting plate, ensuring the working quality of the grinding machine.

[0012] The frame has a through slot inside that can accommodate the movement of the vertical plate, and the through slot is arranged parallel to the second lead screw.

[0013] With the above structure, the through slot is set between the first lead screw and the guide rail. By setting the through slot, when the support moves the vertical plate parallel inside the frame, the vertical plate moves synchronously inside the frame, avoiding interference between the frame and the vertical plate, and realizing the effect of synchronous detection of the motor shaft by the vertical plate at different positions.

[0014] The bottom end of the vertical plate is threaded with a hand-tightening screw, and the outer wall of the hand-tightening screw is rotatably connected with a pressure plate, which is located below the support. The top of the pressure plate is fixedly connected to a sliding column, which is slidably inserted into the bottom of the vertical plate.

[0015] By adopting the above structure, the pressure plate is connected to the hand-tightening screw through the rotating shaft. When the hand-tightening screw rotates at the bottom of the vertical plate, it can simultaneously drive the pressure plate to adjust its height at the bottom of the vertical plate. Furthermore, under the sliding action of the sliding column, the extension and retraction of the pressure plate at the bottom of the vertical plate is guided, ensuring the accuracy of the pressure plate's height adjustment at the bottom of the vertical plate.

[0016] A push switch is fixedly installed at the bottom of the support, and the push switch is correspondingly set above the pressure plate. The push switch and the electric push rod are electrically connected.

[0017] With the above structure, the pressure plate can open and close the push switch by squeezing it, and the electric push rod can push the connecting plate outward on one side, which facilitates the connecting plate to drive the grinding wheel to retract through the support. This realizes the automatic retraction of the motor shaft after machining, avoids the problem of over-grinding, and effectively ensures the machining quality of the motor shaft.

[0018] A fixing plate is fixedly installed at the bottom end of the support, and a return spring is fixedly installed on the outer wall of the fixing plate. A connecting plate is fixedly installed at the other end of the return spring, and the return spring is located between two racks. An electric push rod is also fixedly installed on the outer wall of the fixed plate, and a connecting plate is fixedly installed on the output end of the electric push rod. The electric push rod is located between two reset springs, and a push switch is electrically connected to the outside of the electric push rod.

[0019] By adopting the above structure and setting the fixed plate, a stable connection between the reset spring and the push switch is achieved, which enables a stable drive for the connecting plate. This facilitates the extension and retraction of the connecting plate on one side of the support, making it convenient to retract the grinding wheel. In addition, a slot is set above the rack, which slides on both sides of the support, achieving a stable sliding connection between the connecting plate and the support, and ensuring the guiding effect of the connecting plate.

[0020] Compared with the prior art, the automatic grinding machine inspection device for motor shaft precision inspection of this utility model has the following advantages: In this invention, the sliding arrangement of the support on the frame surface allows the support to drive the grinding wheel to grind the motor shaft at different positions between the tailstock and the chuck, ensuring the flexibility of the device. Furthermore, by extending and retracting a vertical plate inside the support, the user can adjust the height of the marking rod and pressure plate according to the grinding amount, under the action of the marking rod and pressure plate. This allows the detection plate to simultaneously drive the gear column and electric push rod under the elastic action of the telescopic spring, achieving automatic tool retraction when the motor shaft is ground to the precise value. This avoids over-grinding of the motor shaft and ensures automatic detection of motor shaft grinding. Compared to existing observation and inspection methods, this significantly improves work efficiency and effectively reduces the scrap rate of motor shaft production. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of an automatic grinding machine inspection device for detecting the accuracy of a motor shaft, according to this utility model.

[0022] Figure 2 This is a schematic diagram of the bottom connection structure between the support and the rack in this utility model.

[0023] Figure 3 This is an exploded structural diagram of the support and connection in this utility model.

[0024] Figure 4 This is a cross-sectional structural diagram of the support and frame in this utility model.

[0025] In the picture: 1. Frame; 2. Chuck; 3. Drive motor; 4. First lead screw; 5. Tailstock; 6. Guide rail; 7. First handwheel; 8. Second lead screw; 9. Second handwheel; 10. Support; 11. Vertical plate; 12. Detection plate; 13. Pressure plate; 14. Hand-tightening screw; 15. Press switch; 16. Through slot; 17. Side plate; 18. Marking rod; 19. Locking nut; 20. Gear column; 21. Rack; 22. Connecting plate; 23. Electric push rod; 24. Fixing plate; 25. Return spring; 26. Support; 27. Grinding wheel. Detailed Implementation

[0026] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments. Example

[0027] like Figures 1-4 As shown; An automatic grinding machine inspection device for motor shaft precision inspection includes a frame 1, a chuck 2 rotatably connected to the top of the frame 1, a drive motor 3 for driving the chuck 2, a first lead screw 4, a tailstock 5, a guide rail 6, a first handwheel 7, a second lead screw 8, a second handwheel 9, a support 10, a vertical plate 11, a detection plate 12, a pressure plate 13, a hand-tightening screw 14, a push switch 15, a through slot 16, a side plate 17, a marking rod 18, a locking nut 19, a gear column 20, a rack 21, a connecting plate 22, an electric push rod 23, a fixing plate 24, a return spring 25, a support 26, and a grinding wheel 27. The first lead screw 4 is rotatably mounted inside the frame 1. The tailstock 5 is mounted on the outer wall of the first lead screw 4 via a ball nut, and the bottom end of the tailstock 5 is slidably connected to the guide rail 6. The guide rail 6 is fixedly installed inside the frame 1, and the guide rail 6 is parallel to the first lead screw 4. The first handwheel 7 is fixedly installed on the outer end of the first lead screw 4, and the first handwheel 7 is located on the outer side of the frame 1. Through the arrangement of the first lead screw 4 and the first handwheel 7, the user can drive the first lead screw 4 to rotate through the first handwheel 7, thereby moving the tailstock 5 on the outer wall of the first lead screw 4. Moreover, the arrangement of the guide rail 6 ensures the accuracy of the movement of the tailstock 5. Specifically, the tailstock 5 is coaxially set with the chuck 2, which ensures the stability and concentricity of the chuck 2 and the tailstock 5 in clamping the motor shaft, which is beneficial to improving the machining accuracy of the motor shaft. The outer wall of the frame 1 is slidably connected to the support 10, and the support 10 is located on one side of the chuck 2. Specifically, the internal rotational connection of the frame 1 is... A second lead screw 8 is provided, which is parallel to the first lead screw 4. A second handwheel 9 is fixedly connected to the outer end of the second lead screw 8, and the second handwheel 9 is located on the outer side of the frame 1. A support 10 is connected to the outer wall of the second lead screw 8 by a ball nut, and the support 10 is slidably connected to the outer wall of the frame 1. The arrangement of the second lead screw 8 allows the support 10 to slide precisely below the frame 1. At the same time, a groove is provided inside the support 10 to facilitate sliding guidance on the outer wall of the frame 1, achieving a precise guiding effect on the movement path of the support 10. This allows the support 10 to drive the grinding wheel 27 to process the motor shaft at different positions between the tailstock 5 and the chuck 2 via the connecting plate 22, ensuring the working quality of the grinding machine. A vertical plate 11 is provided through the inside of the support 10. Two vertical plates 11 are arranged in parallel, and a telescopic spring is provided between the two vertical plates 11. The bottom end of the telescopic spring is fixedly installed on the surface of the support 10, and the top end of the telescopic spring is fixedly installed on the bottom end of the detection plate 12. The inside of the frame 1 is provided with a through groove 16 that can accommodate the movement of the vertical plates 11. The through groove 16 is arranged parallel to the second lead screw 8. The through groove 16 is set between the first lead screw 4 and the guide rail 6. Through the setting of the through groove 16, when the support 10 drives the vertical plates 11 to move parallel inside the frame 1, the vertical plates 11 move synchronously inside the frame 1, avoiding interference between the frame 1 and the vertical plates 11. This achieves the effect of synchronous detection of the motor shaft by the vertical plates 11 at different positions. The detection plate 12 is fixedly installed at the top of the vertical plates 11.The detection plate 12 has an upward-arched arc-shaped structure, which ensures that the top of the detection plate 12 always fits against the bottom of the motor shaft, thus ensuring the detection accuracy of the detection plate 12. Side plates 17 are fixedly installed on both outer walls of the vertical plate 11. The side plates 17 are located above the support 10. A marking rod 18 is installed through the interior of the side plate 17, and the outer wall of the marking rod 18 is provided with scale lines. A locking nut 19 is threadedly connected to the outer wall of the marking rod 18. The locking nut 19 is located on the surface of the side plate 17. A hand-tightening screw 14 is threadedly connected to the bottom end of the vertical plate 11, and a pressure plate 13 is rotatably connected to the outer wall of the hand-tightening screw 14. The pressure plate 13 is located below the support 10. A sliding column is fixedly connected to the top of the pressure plate 13, and the sliding column is slidably inserted into the bottom end of the vertical plate 11. The pressure plate 13 is connected to the hand-tightening screw 14 through a rotating shaft, so that when the hand-tightening screw 14 rotates at the bottom end of the vertical plate 11, it can synchronously drive the pressure plate 13 to adjust the height at the bottom end of the vertical plate 11. Under the sliding action of the sliding column, The guide plate 13 extends and retracts at the bottom of the vertical plate 11, ensuring the accuracy of the height adjustment of the plate 13 at the bottom of the vertical plate 11. At the same time, a push switch 15 is fixedly installed at the bottom of the support 10, and the push switch 15 is correspondingly set above the plate 13. The push switch 15 is electrically connected to the electric push rod 23. Under the corresponding setting of the push switch 15 and the plate 13, the plate 13 can open and close the push switch 15 by squeezing. Under the electrical connection between the push switch 15 and the electric push rod 23, the electric push rod 23 pushes the connecting plate 22 outward on one side, which facilitates the connecting plate 22 to drive the grinding wheel 27 to retract through the support 26. This realizes the automatic retraction of the motor shaft after processing, avoids the problem of over-grinding, and effectively ensures the processing quality of the motor shaft. Furthermore, to achieve the transmission effect of the marking rod 18, a gear column 20 is rotatably connected below the support 10, and the marking rod 18 is movably inserted into one side of the gear column 20's tooth groove. A rack 21 is meshed with the outer wall of the gear column 20, and the rack 21 is slidably connected to columns on both sides of the support 10. A connecting plate 22 is fixedly installed on the outer end of the rack 21, and a support 26 is fixedly installed on the surface of the connecting plate 22. A grinding wheel 27 is rotatably connected above the support 26, and a servo motor for driving the grinding wheel 27 is fixedly installed on the outer side of the support 26. The grinding wheel 27 is located on one side of the detection plate 12. A fixing plate 24 is fixedly installed at the bottom end of the support 10, and a return spring 25 is fixedly installed on the outer wall of the fixing plate 24. The other end of the return spring 25 is fixedly installed with the connecting plate 22. The return spring 25 is located between the two racks 21. An electric push rod 23 is also fixedly installed on the outer wall of the fixing plate 24. A connecting plate 22 is fixedly installed at the output end of the electric push rod 23. The electric push rod 23 is located between the two return springs 25. A push switch 15 is electrically connected to the outside of the electric push rod 23. Through the setting of the fixing plate 24, the return spring 25 and the push switch 15 are stably connected, and the connecting plate 22 is stably driven. This facilitates the extension and retraction of the connecting plate 22 on one side of the support 10, which is convenient for retracting the grinding wheel 27. In addition, a slot is provided above the rack 21. The slot is slidably connected to both sides of the support 10, which realizes a stable sliding connection between the connecting plate 22 and the support 10, ensuring the guiding effect of the moving connecting plate 22.

[0028] The working principle of this utility model is as follows: During operation, the motor shaft is fixed between the chuck 2 and the tailstock 5. Under the action of the drive motor 3, the chuck 2 drives the motor shaft to rotate during grinding. Furthermore, under the action of the first lead screw 4 and the guide rail 6, the tailstock 5 can fix motor shafts of different lengths, ensuring the flexibility of the grinding machine. Before grinding, the electric push rod 23 drives the connecting plate 22 to press the return spring 25, facilitating the support 26 to drive the grinding wheel 27 to grind the outer wall of the motor shaft. Simultaneously, the grinding amount is marked by the marking rod 18, which is inserted into the gear column 20 at the corresponding grinding height. The marking rod 18 is fixed by the locking nut 19, ensuring that the marking rod 18 is fixed to the vertical plate 11. Under the elastic action of the telescopic spring, the detection plate 12 is always in contact with the bottom end of the motor shaft. At the same time, by rotating the hand-tightening screw 14 at the bottom of the pressure plate 13, the pressure plate... 13. Adjust the corresponding grinding distance synchronously below the press switch 15, and then start grinding the motor shaft through the grinding wheel 27. After the motor shaft is ground to the required position, the detection plate 12 moves upward under the elastic action of the telescopic spring, and the corresponding height marker rod 18 moves upward synchronously, so that the marker rod 18 does not limit the gear column 20. Then the connecting plate 22 can be pressed outward under the elastic action of the return spring 25. At the same time, in order to ensure the driving effect of the connecting plate 22, under the action of the pressure plate 13 connected to the bottom of the vertical plate 11, the pressure plate 13 presses the press switch 15 synchronously when the vertical plate 11 moves upward. Through the electrical connection between the press switch 15 and the electric push rod 23, the electric push rod 23 pushes the connecting plate 22 to move outward. This realizes that the connecting plate 22 drives the grinding wheel 27 to retract through the support 26, avoiding over-grinding of the motor shaft. This completes the working principle of the automatic detection device for the grinding machine for motor shaft accuracy detection.

[0029] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An automatic grinding machine inspection device for detecting the accuracy of a motor shaft, comprising a frame (1), a chuck (2) rotatably connected to the top of the frame (1), and a drive motor (3) for driving the chuck (2), characterized in that: The outer wall of the frame (1) is slidably connected to a support (10), and the support (10) is located on one side of the clamp (2). A vertical plate (11) is provided through the inside of the support (10), and a detection plate (12) is fixedly installed at the top of the vertical plate (11). There are two vertical plates (11) arranged in parallel, and a telescopic spring is provided between the two vertical plates (11). The bottom end of the telescopic spring is fixedly installed on the surface of the support (10), and the top end of the telescopic spring is fixedly installed at the bottom end of the detection plate (12). Side plates (17) are fixedly installed on both sides of the outer wall of the vertical plate (11), and the side plates (17) are located above the support (10). A marking rod (18) is provided through the interior of the side plate (17), and a scale line is provided on the outer wall of the marking rod (18). A locking nut (19) is threadedly connected to the outer wall of the marking rod (18), and the locking nut (19) is located on the surface of the side plate (17). A gear column (20) is rotatably connected to the lower part of the support (10), and a marking rod (18) is movably inserted into one side of the gear column (20). A rack (21) is meshed with the outer wall of the gear column (20). The rack (21) is slidably connected to the columns on both sides of the support (10). A connecting plate (22) is fixedly installed at the outer end of the rack (21), and a support (26) is fixedly installed on the surface of the connecting plate (22). A grinding wheel (27) is rotatably connected above the support (26), and a servo motor for driving the grinding wheel (27) is fixedly installed on the outer side of the support (26). The grinding wheel (27) is located on one side of the detection plate (12).

2. The automatic grinding machine inspection device for motor shaft accuracy inspection according to claim 1, characterized in that: The first lead screw (4) is rotatably installed inside the frame (1). The tailstock (5) is installed on the outer wall of the first lead screw (4) through a ball nut. The bottom end of the tailstock (5) is slidably connected to a guide rail (6). The guide rail (6) is fixedly installed inside the frame (1) and is parallel to the first lead screw (4). The first screw (4) is fixedly mounted with a first handwheel (7) at its outer end, and the first handwheel (7) is located on the outside of the frame (1).

3. The automatic grinding machine inspection device for motor shaft accuracy inspection according to claim 1, characterized in that: The frame (1) is rotatably connected to a second lead screw (8), which is parallel to the first lead screw (4). The outer wall of the second lead screw (8) is connected to a support (10) through a ball nut, and the support (10) is slidably connected to the outer wall of the frame (1). The second screw (8) is fixedly connected to a second handwheel (9) at its outer end, and the second handwheel (9) is located on the outside of the frame (1).

4. The automatic grinding machine inspection device for motor shaft accuracy inspection according to claim 1, characterized in that: The frame (1) has a through slot (16) inside that can accommodate the movement of the vertical plate (11), and the through slot (16) is arranged parallel to the second lead screw (8).

5. The automatic grinding machine inspection device for motor shaft accuracy inspection according to claim 4, characterized in that: The bottom end of the vertical plate (11) is threaded with a hand-tightening screw (14), and the outer wall of the hand-tightening screw (14) is rotatably connected with a pressure plate (13), which is located below the support (10). The top of the pressure plate (13) is fixedly connected to a sliding column, and the sliding column is slidably inserted into the bottom of the vertical plate (11).

6. The automatic grinding machine inspection device for motor shaft accuracy inspection according to claim 5, characterized in that: A push switch (15) is fixedly installed at the bottom of the support (10), and the push switch (15) is correspondingly set above the pressure plate (13). The push switch (15) and the electric push rod (23) are electrically connected.

7. The automatic grinding machine inspection device for motor shaft accuracy inspection according to claim 6, characterized in that: A fixing plate (24) is fixedly installed at the bottom end of the support (10), and a return spring (25) is fixedly installed on the outer wall of the fixing plate (24). A connecting plate (22) is fixedly installed at the other end of the return spring (25), and the return spring (25) is located between two racks (21). An electric push rod (23) is also fixedly installed on the outer wall of the fixed plate (24), and a connecting plate (22) is fixedly installed on the output end of the electric push rod (23). The electric push rod (23) is located between two reset springs (25), and a push switch (15) is electrically connected to the outside of the electric push rod (23).

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