Machine tool bearing positioning device

Abstract

The utility model relates to the technical field of machine tool auxiliary devices, and discloses a machine tool bearing positioning device which comprises a screwing ring, a plurality of ring holes are formed in the inner wall of the screwing ring, a screw ring is connected to the inner wall of the screwing ring in a sliding mode, a plurality of ring blocks are fixedly connected to the outer wall of the screw ring, a clamping groove is formed in the outer wall of the screw ring, and a clamping groove is formed in the clamping groove. A stud is in threaded connection with the inner wall of the threaded ring, a sliding column is fixedly connected to the front side of the stud, a plurality of sliding blocks are fixedly connected to the outer wall of the sliding column, two clamping blocks are arranged on the outer wall of the sliding column, a plurality of sliding grooves are formed in the inner walls of the two clamping blocks, and a rotating ring is in threaded connection with the rear side of the outer wall of the stud. And the outer wall of the rotating ring is fixedly connected with a rotating block. According to the bearing positioning device, the clamping blocks are clamped with the clamping grooves in the inner wall of the bearing part, radial and axial positioning of the bearing part can be achieved at the same time, deviation of the bearing in the working process is effectively avoided, and the mounting precision and the working stability of the bearing are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of machine tool auxiliary device technology, and in particular to a machine tool bearing positioning device. Background Technology

[0002] As modern manufacturing demands increasingly higher precision in parts processing, the precision of machine tools themselves continues to improve, and the shapes and structures of parts become more and more complex. This places higher demands on the functions and processing capabilities of machine tools. Machine tool auxiliary devices can expand the processing functions of machine tools, enabling them to complete more complex processing tasks.

[0003] The machining accuracy of a machine tool largely depends on the relative positional accuracy between its components. Bearing positioning devices can precisely determine the bearing's position within the machine tool, thus ensuring the relative positional accuracy between the spindle and the worktable. Under high-speed operation, bearings need to withstand greater centrifugal and inertial forces. Insecure bearing positioning can lead to loosening or vibration during high-speed operation, affecting the normal operation of the machine tool. Machine tool bearing positioning devices can provide sufficient preload and rigidity to keep the bearing stable during high-speed operation, improving the dynamic stability of the machine tool. To prevent vibrations and impacts generated during machine tool operation from being transmitted to the bearing, causing it to axially move due to cutting forces and vibrations, existing bearing positioning devices are equipped with retaining rings.

[0004] Existing bearing positioning devices use snap rings to continuously apply axial clamping force to the bearing, keeping it in a predetermined axial position. The snap ring engages with a groove in the shaft or bearing housing, securing the outer or inner ring of the bearing. The snap ring generates a moderate clamping force within the groove, preventing axial movement of the bearing and achieving axial positioning. A stable bearing position helps improve the machining accuracy and stability of machine tools and reduces machining errors. However, the elastic deformation of the snap ring occurs in the axial direction, with minimal elastic deformation in the radial direction. It is difficult for the snap ring to effectively constrain the radial movement of the bearing through its own elasticity, leading to radial offset of the bearing during operation, which in turn affects the machining accuracy and stability of the machine tool. Therefore, a machine tool bearing positioning device is proposed to solve these problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a machine tool bearing positioning device, which aims to improve the problem of radial misalignment of bearings in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a machine tool bearing positioning device, comprising a screw ring, wherein the inner wall of the screw ring has multiple annular holes, a threaded ring is slidably connected to the inner wall of the screw ring, multiple ring blocks are fixedly connected to the outer wall of the threaded ring, a clamping groove is formed on the outer wall of the threaded ring, a stud is threadedly connected to the inner wall of the threaded ring, a sliding column is fixedly connected to the front side of the stud, multiple sliders are fixedly connected to the outer wall of the sliding column, two clamping blocks are provided on the outer wall of the sliding column, and multiple sliding grooves are formed on the inner walls of the two clamping blocks. The outer wall of the stud is threaded with a rotating ring, the outer wall of the rotating ring is fixedly connected with a rotating block, the outer wall of the rotating ring has multiple positioning holes, the inner wall of the rotating ring is provided with multiple positioning components, the outer wall of the rotating ring is slidably connected with an insert ring, the outer wall of the insert ring has multiple sliding holes, the inner wall of the insert ring has a rotating groove, the outer wall of the insert ring is slidably connected with a bearing component, the inner wall of the bearing component has a retaining groove, and the outer walls of the two clamping blocks are provided with the same clamping mechanism, which is used for radially fixing the positioning device.

[0007] As a further description of the above technical solution:

[0008] The clamping mechanism includes two clamping pieces, the inner walls of the two clamping pieces are slidably connected to the outer wall of the clamping block, two clamping plates are fixedly connected to the outer walls of the two clamping pieces, bolts are threadedly connected to the inner walls of the clamping plates, clamping shells are fixedly connected to the outer walls of the two clamping pieces, and fixing seats are fixedly connected to the front side of the outer walls of the two clamping shells.

[0009] As a further description of the above technical solution:

[0010] The positioning component includes a rotating shaft, the outer wall of which is fixedly connected to an adjacent side of two positioning holes, and two rotating plates are slidably connected to the outer wall of the rotating shaft.

[0011] As a further description of the above technical solution:

[0012] The inner walls of the two rotating plates are rotatably connected to the same fixed shaft, and the inner walls of both rotating plates are slidably connected to sliding shafts.

[0013] As a further description of the above technical solution:

[0014] The outer walls of the two sliding shafts are fixedly connected to the same sliding rod on adjacent sides, and the top of the sliding rod is fixedly connected to a locking block.

[0015] As a further description of the above technical solution:

[0016] The inner wall of the bearing component is fixedly connected to a retaining ring, and the inner wall of the bearing component is slidably connected to multiple balls.

[0017] As a further description of the above technical solution:

[0018] The inner wall of the insertion ring is fixedly connected to a baffle, and the inner wall of the fixing seat is threaded with multiple screws.

[0019] As a further description of the above technical solution:

[0020] The outer walls of the multiple screws are threadedly connected to the same fixing plate, and the outer wall of the fixing plate is slidably connected to the machine tool side plate.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, the device engages with the slot on the inner wall of the bearing part through a locking block, which can simultaneously achieve radial and axial positioning of the bearing part, effectively preventing the bearing from shifting during operation, ensuring the installation accuracy and working stability of the bearing. At the same time, through the threaded connection between the screw ring and the stud, the rotational motion of the screw ring is converted into the linear motion of the stud. This motion conversion method can accurately control the axial displacement of the stud, meeting the requirements of different positions and accuracy during the positioning of machine tool bearings.

[0023] 2. In this utility model, by rotating the bolt to screw it in or out of the threaded hole of the clamping plate, the distance between the two clamping plates can be changed, thereby precisely adjusting the clamping force on the positioning device. This can effectively prevent the clamping plates from loosening due to machine tool vibration or other external forces. Under high-speed operation of the machine tool, this stable clamping state can ensure that the positioning device is firmly fixed on the machine tool, avoiding loosening or vibration due to insecure bearing positioning, and thus ensuring the normal operation of the machine tool. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of the machine tool bearing positioning device proposed in this utility model;

[0025] Figure 2 This is a partial structural exploded view of the machine tool bearing positioning device proposed in this utility model;

[0026] Figure 3 This is a partial structural schematic diagram of the machine tool bearing positioning device proposed in this utility model;

[0027] Figure 4 This is a structural exploded view of the insert ring of the machine tool bearing positioning device proposed in this utility model;

[0028] Figure 5 This is a partial structural cross-sectional view of the machine tool bearing positioning device proposed in this utility model;

[0029] Figure 6 This is a schematic diagram of the positioning component of the machine tool bearing positioning device proposed in this utility model;

[0030] Figure 7 This is an exploded view of the clamping mechanism of the machine tool bearing positioning device proposed in this utility model.

[0031] Legend:

[0032] 1. Tightening ring; 2. Clamping mechanism; 201. Clamping piece; 202. Clamping plate; 203. Bolt; 204. Clamping shell; 205. Fixed seat; 3. Ring hole; 4. Threaded ring; 5. Ring block; 6. Clamping groove; 7. Stud; 8. Sliding column; 9. Sliding block; 10. Clamping block; 11. Sliding groove; 12. Rotary ring; 13. Rotary block; 14. Positioning hole; 15. Insert ring; 16. Sliding hole; 17. Rotary groove; 18. Bearing parts; 19. Slot; 20. Shielding ring; 21. Baffle; 22. Screw; 23. Fixed plate; 24. Machine tool side plate; 25. Rotating shaft; 26. Rotating plate; 27. Fixed shaft; 28. Sliding shaft; 29. ​​Sliding rod; 30. Clamping block; 31. Ball bearing. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] See attached document Figure 2 Appendix Figure 3 and attached Figure 4This utility model provides an embodiment of a machine tool bearing positioning device, including a screw ring 1. The screw ring 1 provides a force point for the operator, transmits power to the internal mechanism, and encloses the entire transmission system internally, preventing the transmission system from being contaminated by dust in the air. Multiple annular holes 3 are formed on the inner wall of the screw ring 1. A screw ring 4 is slidably connected to the inner wall of the screw ring 1. Multiple ring blocks 5 are fixedly connected to the outer wall of the screw ring 4. The ring blocks 5 engage in the annular holes 3, connecting the screw ring 1 and the screw ring 4 together, effectively limiting the displacement of the screw ring 4 relative to the screw ring 1, ensuring a fixed relative position between the two, and making the transmission process more stable and reliable. A clamping groove 6 is formed on the outer wall of the screw ring 4, and a stud 7 is threadedly connected to the inner wall of the screw ring 4. The stud 7 is threadedly connected to the inner wall of the screw ring 4. When the screw ring 1 rotates, it drives the screw ring 4 to rotate through the connection between the ring hole 3 and the ring block 5, thereby causing the stud 7 to generate axial displacement within the screw ring 4, realizing the transmission and conversion of power, converting rotational motion into linear motion, and thus driving other components to perform corresponding actions. A sliding column 8 is fixedly connected to the front side of the stud 7. The sliding column 8 is fixedly connected to the front side of the stud 7 and moves synchronously with the axial movement of the stud 7, playing the role of transmitting power and displacement. Multiple sliders 9 are fixedly connected to the outer wall of the sliding column 8. The sliding column 8 transmits the linear motion of the stud 7 to the sliders 9. Two clamping blocks 10 are provided on the outer wall of the sliding column 8. The clamping blocks 10 cooperate with the clamping mechanism 2 to clamp and fix the transmission system. At the same time, the protruding part of the outer wall of the clamping block 10 is slidably connected in the clamping groove 6 of the ring block 5. Each clamping block 10 has multiple grooves 11 on its inner wall. The slider 9 slides within the grooves 11, ensuring the stability and accuracy of the clamping block 10 during movement, enabling it to accurately position and fix the bearing. A rotating ring 12 is threaded onto the rear side of the outer wall of the stud 7. The linear motion of the stud 7 drives the rotating ring 12 to rotate. A rotating block 13 is fixedly connected to the outer wall of the rotating ring 12, and the rotating block 13 is slidably connected to the rotating groove 17. Multiple positioning holes 14 are provided on the outer wall of the rotating ring 12 to provide installation positions and reference benchmarks for the positioning components. Multiple positioning components are provided on the inner wall of the rotating ring 12. The positioning components include a rotating shaft 25. The outer wall of the rotating shaft 25 is fixedly connected to the adjacent side of two positioning holes 14. The rotating shaft 25 serves as the rotation axis of the rotating plate 26, allowing the rotating plate 26 to rotate around it. The rotating shaft 25 defines the rotation center of the rotating plate 26, ensuring its stability and accuracy during rotation and providing a basis for subsequent positioning operations. Two rotating plates 26 are slidably connected to the outer wall of the rotating shaft 25. These two plates 26 are connected together by a fixed shaft 27 and rotate around the rotating shaft 25. The rotating plates 26 transmit motion and force during positioning. When the rotating ring 12 rotates, the rotating plates 26 rotate accordingly based on the position change of the rotating ring 12, thereby driving the sliding shaft 28 to move. The inner walls of the two rotating plates 26 are rotatably connected to the same fixed shaft 27, ensuring a fixed relative position between the two plates 26 and ensuring synchronized movement during rotation. The outer wall of the fixed shaft 27 is fixedly connected to the inner wall of the insertion ring 15.The overall stability and reliability of the positioning assembly are improved. Sliding shafts 28 are slidably connected to the inner walls of both rotating plates 26. The sliding shafts 28 allow a certain degree of sliding within the rotating plates 26, enabling the sliding rod 29 to adjust its displacement according to the rotation angle and position changes of the rotating plates 26. This provides a flexible adjustment mechanism for the accurate movement of the locking block 30. The same sliding rod 29 is fixedly connected to adjacent sides of the outer walls of the two sliding shafts 28, transmitting the movement of the two sliding shafts 28 to the locking block 30, allowing the locking block 30 to move under the drive of the sliding rod 29. The sliding rod 29 is slidably connected to the inner wall of the insertion ring 15, serving as a connection and transmission mechanism, ensuring coordinated movement between the locking block 30 and the rotating plates 26, and achieving precise control of the locking block 30's position. The top of the sliding rod 29 is fixedly connected to the locking block 30. When the rotating ring 1... When rotated to a specific position, the locking block 30 moves to the locking groove 19 under the drive of the slide rod 29 and engages with the locking groove 19 on the bearing part 18, thereby preventing the radial and axial displacement of the bearing part 18. A plug ring 15 is slidably connected to the outer wall of the rotating ring 12. Multiple sliding holes 16 are provided on the outer wall of the plug ring 15, and a rotating groove 17 is provided on the inner wall of the plug ring 15. The rotating groove 17 provides rotation space for the rotating block 13 and simultaneously locks the rotating block 13, preventing it from shifting. The bearing part 18 is slidably connected to the outer wall of the plug ring 15, and a locking groove 19 is provided on the inner wall of the bearing part 18. The locking groove 19 provides movement space for the locking block 30. When the locking block 30 engages with the locking groove 19, the radial and axial positions of the bearing part 18 are locked. The outer walls of the two clamping blocks 10 are provided with the same clamping mechanism 2, which is used for radial fixing and positioning.

[0035] See attached document Figure 1 and attached Figure 7The clamping mechanism 2 includes two clamping plates 201. The inner walls of the two clamping plates 201 are slidably connected to the outer wall of the clamping block 10. The two clamping plates 201 cooperate with each other to clamp the positioning device radially. The clamping plates 201 have elastic properties and can undergo elastic deformation to a certain extent, thereby better adapting to positioning devices of different sizes and ensuring the tightness and stability of the clamping. Two clamping plates 202 are fixedly connected to the outer walls of the two clamping plates 201. The clamping plates 202 play an important role in connecting the clamping plates 201 and the bolts 203. During the clamping operation, the tightening force of the bolts 203 is evenly transmitted through the clamping plates 202. The clamping plates 201 ensure that all parts of the clamping plates 201 are simultaneously subjected to uniform clamping force, thereby making the clamping of the positioning device by the clamping plates 201 more balanced and stable, further improving the accuracy and reliability of radial fixing. Multiple clamping plates 202 have bolts 203 threadedly connected to their inner walls. The bolts 203, threaded into the inner walls of the clamping plates 202, are key components for controlling the clamping force of the clamping mechanism 2. By rotating the bolts 203, allowing them to screw in or out of the threaded holes in the clamping plates 202, the distance between the two clamping plates 201 can be changed, thereby precisely adjusting the clamping force on the positioning device. When tightened to the appropriate position, clamping plates 203 can firmly fix the two clamping plates 201 together, forming a stable clamping state. This effectively prevents the clamping plates 201 from loosening due to machine tool vibration or other external forces, thus ensuring the durability and reliability of the radial fixation of the positioning device and providing strong support for the stable operation of the machine tool. Clamping shells 204 are fixedly connected to the outer walls of both clamping plates 201, serving to protect the clamping plates 201 and enhance the structural strength of the entire clamping mechanism 2. This prevents the clamping plates 201 from being damaged by external environmental erosion or impact, extending the service life of the clamping plates 201. Simultaneously, clamping shells 204... Additional support is provided for the clamping plate 201, which helps to fix the position of the clamping plate 201 to a certain extent, preventing the clamping plate 201 from accidentally shifting or twisting during the clamping process. This improves the overall rigidity and stability of the clamping mechanism 2 and ensures that the clamping force can be effectively transmitted to the positioning device. The front side of the outer wall of both clamping shells 204 is fixedly connected to the fixing seat 205, which accurately installs and positions the clamping mechanism 2 on the machine tool. At the same time, it provides a stable support point for the clamping mechanism 2, so that it can be firmly fixed on the equipment and prevent displacement or shaking due to external forces such as vibration and impact during the operation of the machine tool.

[0036] See attached document Figure 1 Appendix Figure 5 and attached Figure 6A retaining ring 20 is fixedly connected to the inner wall of the bearing component 18. The retaining ring 20 is connected to the protruding part of the outer wall of the insert ring 15, providing a defined position for the insert ring 15 to slide on the inner wall of the bearing component 18. Multiple balls 31 are slidably connected to the inner wall of the bearing component 18. The balls 31 can withstand loads from various directions, including radial loads, axial loads, and torque loads. By bearing the load in the bearing component 18 through the balls 31, support and rotation can be provided in different directions. Simultaneously, because the contact area between the balls 31 and the bearing component 18 is relatively small, the friction loss is less compared to sliding friction during rolling motion, which can reduce the power consumption and wear of the bearing component 18 and improve its performance. For longevity, a baffle 21 is fixedly connected to the inner wall of the insert ring 15. The baffle 21 is connected to the inner shaft of the bearing part 18 and cooperates with the retaining ring 20 to restrict the position of the insert ring 15 inside the bearing part 18. At the same time, the baffle 21 separates the transmission system and the interior of the bearing part 18, forming independent spaces for each. The inner wall of the fixed seat 205 is threaded with multiple screws 22. The outer wall of the multiple screws 22 is threaded with the same fixed plate 23. The outer wall of the fixed plate 23 is slidably connected to the machine tool side plate 24. The multiple screws 22 pass through the fixed plate 23, the machine tool side plate 24 and the fixed seat 205, and firmly fix the fixed plate 23 and the fixed seat 205 to the machine tool side plate 24, thereby fixing the entire positioning device on the machine tool.

[0037] Working principle: First, the operator rotates the screw ring 1 counterclockwise. The screw ring 1 provides the force point for operation. When the screw ring 1 rotates, the multiple annular holes 3 on its inner wall engage with the multiple ring blocks 5 fixedly connected to the outer wall of the screw ring 4, causing the screw ring 4 to rotate in the same direction. At the same time, because the ring blocks 5 are engaged in the annular holes 3, the displacement of the screw ring 4 relative to the screw ring 1 is effectively restricted, ensuring that the relative positions of the two are fixed, making the transmission process stable and reliable. When the screw ring 4 rotates counterclockwise, because its inner wall is threadedly connected to the stud 7, the stud 7 will generate axial displacement within the screw ring 4, realizing the rotational motion of the screw ring 1. The rearward linear movement of the stud 7 drives other components to perform corresponding actions. The sliding pin 8, fixedly connected to the front of the stud 7, moves synchronously to the rear as the stud 7 moves axially, transmitting power and displacement. Simultaneously, multiple sliders 9 fixedly connected to the outer wall of the sliding pin 8 slide within multiple grooves 11 opened on the inner wall of the clamping block 10. The sliding distance and direction are consistent with the displacement of the stud 7. The two clamping blocks 10 on the outer wall of the sliding pin 8 cooperate with the clamping mechanism 2 to clamp and fix the transmission system. Furthermore, the protruding portion of the outer wall of the clamping block 10 slides in the clamping groove 6 opened on the outer wall of the screw ring 4. In this way, the integrity and stability of the structure are further guaranteed, ensuring that the stud 7 maintains linear motion without rotation during movement. The swivel ring 12, which is threaded to the rear side of the outer wall of the stud 7, will rotate counterclockwise as the stud 7 moves backward in a linear motion. The swivel block 13, which is fixedly connected to the outer wall of the swivel ring 12, slides in the swivel groove 17 opened in the inner wall of the insert ring 15. The outer wall of the swivel ring 12 is swivelly connected to the inner wall of the insert ring 15, and at the same time, the position of the positioning hole 14 is aligned with the sliding hole 16. The insert ring 15 provides rotation space for the rotation of the swivel ring 12 and restricts its displacement. The multiple positioning holes 14 opened in the outer wall of the swivel ring 12 provide rotation space for the swivel ring 12 and restrict its displacement. The positioning component provides the installation position and reference benchmark. The counterclockwise rotation of the rotating ring 12 drives the rotating shaft 25 to move synchronously. The outer wall of the fixed shaft 27 is fixedly connected to the inner wall of the insert ring 15, fixing the rotating plate 26 in the axial position and allowing it to rotate only radially. The bottom of the rotating plate 26 is pulled by the counterclockwise rotation of the rotating shaft 25, causing the rotating plate 26 to rotate clockwise around the fixed shaft 27, driving the sliding shaft 28 to move upward, causing the sliding rod 29 to slide in the sliding hole 16, pushing the locking block 30 to engage with the locking groove 19. The locking block 30 and the locking groove 19 are engaged, simultaneously achieving axial and radial positioning of the bearing part 18.

[0038] Furthermore, under high-speed operation, the bearings of the machine tool need to withstand greater centrifugal and inertial forces. Insecure bearing positioning can lead to loosening or vibration during high-speed operation, affecting the normal operation of the machine tool. The clamping mechanism 2 radially fixes the positioning device to the machine tool, clamping the two clamping plates 201 vertically to the clamping block 10. Simultaneously, bolts 203 connect the two upper and lower clamping plates 202 on the same side. At this point, the two clamping plates 201 form a ring structure and slide on the outer wall of the clamping block 10. Then, the fixing seat 205... The inner wall of the machine tool side plate 24 is attached, and then the fixing plate 23 is attached to the outer wall of the machine tool side plate 24 and coincides with the central axis of the fixing seat 205. Then, the tip of the screw 22 is screwed into the inner wall of the fixing plate 23, the machine tool side plate 24 and the fixing seat 205 in sequence. Tightening the screw 22 makes the clamping mechanism 2 firmly connected to the machine tool. Then, the bolt 203 is tightened again. The clamping piece 201 is tightly attached to the outer wall of the clamping block 10 and deforms on the inner wall of the clamping shell 204, so that the entire mechanism is firmly radially fixed to the machine tool.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. Machine tool bearing positioning device, comprising a screw ring (1), characterized in that: The inner wall of the screw ring (1) is provided with a plurality of ring holes (3), the inner wall of the screw ring (1) is slidably connected with a screw ring (4), the outer wall of the screw ring (4) is fixedly connected with a plurality of ring blocks (5), the outer wall of the screw ring (4) is provided with a clamping groove (6), the inner wall of the screw ring (4) is threadedly connected with a screw post (7), the front side of the screw post (7) is fixedly connected with a sliding column (8), the outer wall of the sliding column (8) is fixedly connected with a plurality of sliding blocks (9), the outer wall of the sliding column (8) is provided with two clamping blocks (10), the inner walls of the two clamping blocks (10) are each provided with a plurality of sliding grooves (11), the outer wall of the screw post (7) is threadedly connected with a rotating ring (12) at the rear side, the outer wall of the rotating ring (12) is fixedly connected with a rotating block (13), the outer wall of the rotating ring (12) is provided with a plurality of positioning holes (14), the inner wall of the rotating ring (12) is provided with a plurality of positioning assemblies, the outer wall of the rotating ring (12) is slidably connected with an insertion ring (15), the outer wall of the insertion ring (15) is provided with a plurality of sliding holes (16), the inner wall of the insertion ring (15) is provided with a rotating groove (17), the outer wall of the insertion ring (15) is slidably connected with a bearing part (18), the inner wall of the bearing part (18) is provided with a clamping groove (19), the outer walls of the two clamping blocks (10) are provided with the same clamping mechanism (2), and the clamping mechanism (2) is used for radially fixing the positioning device.

2. The machine tool bearing positioning device of claim 1, wherein: The clamping mechanism (2) comprises two clamping pieces (201), the inner walls of the two clamping pieces (201) are slidably connected to the outer wall of the clamping block (10), the outer walls of the two clamping pieces (201) are each fixedly connected with two clamping plates (202), the inner walls of the plurality of clamping plates (202) are each threadedly connected with a bolt (203), the outer walls of the two clamping pieces (201) are each fixedly connected with a clamping shell (204), and the outer walls of the two clamping shells (204) are each fixedly connected with a fixed seat (205).

3. The machine tool bearing positioning device of claim 1, wherein: The positioning assembly comprises a rotating shaft (25), the outer wall of the rotating shaft (25) is fixedly connected to the adjacent side of the two positioning holes (14), and the outer wall of the rotating shaft (25) is slidably connected with two rotating plates (26).

4. The machine tool bearing positioning device of claim 3, wherein: The inner walls of the two rotating plates (26) are rotatably connected with the same fixed shaft (27), and the inner walls of the two rotating plates (26) are each slidably connected with a sliding shaft (28).

5. The machine tool bearing positioning device of claim 4, wherein: The outer walls of the two sliding shafts (28) are fixedly connected with the same sliding rod (29) at the adjacent side, and the top end of the sliding rod (29) is fixedly connected with a clamping block (30).

6. The machine tool bearing positioning device of claim 1, wherein: The inner wall of the bearing part (18) is fixedly connected with a blocking ring (20), and the inner wall of the bearing part (18) is slidably connected with a plurality of rolling balls (31).

7. The machine tool bearing positioning device of claim 2, wherein: The inner wall of the insertion ring (15) is fixedly connected with a baffle (21), and the inner wall of the fixed seat (205) is threadedly connected with a plurality of screws (22).

8. The machine tool bearing positioning device of claim 7, wherein: The outer walls of the plurality of screws (22) are threadedly connected with the same fixed plate (23), and the outer wall of the fixed plate (23) is slidably connected with a machine bed side plate (24).

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