Flange bearing inner ring inner diameter grinding device

CN224765024UActive Publication Date: 2026-09-18LINQING YUNFEI BEARING TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202521461768.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-14
Publication Date
2026-09-18
Estimated Expiration
2035-07-14

AI Technical Summary

Technical Problem

[0003]本实用新型的目的是为了解决现有技术中存在传动的法兰轴承内圈的磨削时,对法兰轴承的限位方式,一般都是将法兰轴承固定不动,需要工作人员或机械顺着内圈转动进行磨削,这中磨削方式不够简便,且无法适配多种规格大小的法兰轴承,使得在加工不同规格大小的法兰轴承时需要更换夹持配件或夹持工具,十分不便,且不方便实时观察磨削的效果,使得出现残次品的概率增加的缺点,而提出的一种法兰轴承内圈内径磨削装置

Benefits of technology

[0015]1. The rotation of the first threaded column can adjust the distance between the two connecting columns, and the rotation of the second threaded column can adjust the distance between the fixed block and the first limit block, thereby adapting to flange bearings of different specifications and sizes. The extension of the telescopic rod of the electro-hydraulic rod can press and fix the flange bearing with the two pressure rollers. The rotation of the first rotating column can drive the flange bearing to rotate.

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Abstract

The utility model belongs to bearing processing technical field especially a flange bearing inner raceway inner diameter grinding device, it includes base, first support frame and electric hydraulic rod, first support frame fixedly arranged in the upper end of base, electric hydraulic rod is fixedly connected with the upper end of first support frame, this grinding device still includes pressing mechanism, pressing mechanism sets up above base, and pressing mechanism is used for clamping and fixing to flange bearing, the utility model discloses, through the cooperation of pressing mechanism and grinding mechanism, can be adapted to different size specifications flange bearing under the condition of not changing clamping accessory, and can drive flange bearing to rotate while fixing flange bearing, make when grinding flange bearing inner raceway inner diameter more convenient and more convenient to run through, not only can improve work efficiency and can effectively reduce the probability of defective product appearance.
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Description

Technical Field

[0001] This utility model relates to the field of bearing processing technology, and in particular to a grinding device for the inner diameter of the inner ring of a flange bearing. Background Technology

[0002] Flange bearings are a type of connecting component with a wide range of applications. They are used in many types of machinery. During the production of flange bearings, the inner ring needs to be ground. This is because flange bearings are often connected to the inner ring, which requires a smooth inner ring. When grinding the inner ring of a transmission flange bearing, the bearing is usually fixed in place, and the worker or machine needs to rotate the inner ring to grind it. This grinding method is not convenient and cannot be adapted to various sizes of flange bearings. This means that when processing flange bearings of different sizes, it is necessary to change the clamping accessories or tools, which is very inconvenient. It is also difficult to observe the grinding effect in real time, increasing the probability of defective products. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies for grinding the inner ring of flange bearings. In conventional methods, the flange bearing is typically fixed in place, requiring workers or machinery to rotate the inner ring for grinding. This method is inconvenient and cannot accommodate flange bearings of various sizes. Changing clamping accessories or tools is necessary when processing different sizes of flange bearings, which is extremely cumbersome. Furthermore, it is difficult to monitor the grinding effect in real time, increasing the probability of defective products. Therefore, this invention proposes a flange bearing inner ring inner diameter grinding device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A grinding device for the inner diameter of the inner ring of a flange bearing includes a base, a first support frame and an electro-hydraulic rod. The first support frame is fixedly mounted on the upper end of the base, and the electro-hydraulic rod is fixedly connected to the upper end of the first support frame. The grinding device also includes a clamping mechanism, which is mounted above the base and is used to clamp and fix the flange bearing. The grinding mechanism is located above the base and is used to grind the inner diameter of the inner ring of the flange bearing.

[0005] Preferably, the clamping mechanism includes: two first sliding blocks, a connecting plate, a motor, two fixed plates, a first rotating column, a driving gear, two driven gears, two second rotating columns, two clamping rollers, two second sliding blocks, a first threaded column, two fixed blocks, two first limiting blocks, two second threaded columns, two rotating rings, and two connecting columns; The inner walls of both sides of the first support frame are provided with first sliding grooves. First sliding blocks are slidably disposed within the first sliding grooves. A connecting plate is disposed between two first sliding blocks and fixedly connected to each of the two first sliding blocks. The first support frame has telescopic holes. The telescopic rod of the electro-hydraulic rod passes through the telescopic holes and is fixedly connected to the upper end of the connecting plate. The motor is fixedly disposed on one side of the upper end of the connecting plate. Two fixed plates are symmetrically fixedly disposed at the lower end of the connecting plate. One end of the first rotating column is keyed to the output shaft of the motor, and the other end is fixedly connected to the drive gear. Two second rotating columns are symmetrically disposed. One end of each second rotating column is fixedly disposed through the pressure roller and rotatably connected to one of the fixed plates. The other end of each second rotating column rotatably passes through the other fixed plate and is fixedly connected to the driven gear. The driven gear and... The driving gears mesh with each other. A second sliding groove is provided at the upper end of the base. Two second sliding blocks are symmetrically slidably disposed in the second sliding groove. One end of the first threaded column rotates through one side of the inner wall of the second sliding groove and extends to the outer side of the base. The other end of the first threaded column is threaded through the two second sliding blocks in sequence and rotates to be connected to the other side of the inner wall of the second sliding groove. A fixing block is fixedly disposed on one side of the upper end of the second sliding block. One end of the second threaded column is rotatedly connected to the fixing block. The other end of the second threaded column is threaded through the first limiting block and extends to the other side of the first limiting block. The first limiting block is slidably connected to the upper end of the second sliding block. A rotating hole is provided on the first limiting block. A rotating ring is rotatably disposed in the rotating hole. One end of the connecting column is rotatedly connected to the fixing block. The other end of the connecting column slides through the rotating ring.

[0006] Furthermore, the rotation of the first threaded column can adjust the distance between the two connecting columns, and the rotation of the second threaded column can adjust the distance between the fixed block and the first limit block, thereby adapting to flange bearings of different specifications and sizes. The extension of the telescopic rod of the electro-hydraulic rod can press and fix the flange bearing with two clamping rollers, and the rotation of the first rotating column can drive the flange bearing to rotate.

[0007] Preferably, the grinding mechanism includes: a third sliding block, a second support frame, a third threaded column, two fourth sliding blocks, a connecting block, a fourth threaded column, a third rotating column, two belts, a grinding tool, and a second limiting block; A third sliding groove is provided at the upper end of the base, and a third sliding block is slidably disposed in the third sliding groove. A second support frame is fixedly disposed at the upper end of the third sliding block. One end of a third threaded post is threaded through the third sliding block and rotatably connected to one side of the inner wall of the third sliding groove. The other end of the third threaded post rotatably passes through the other side of the inner wall of the third sliding groove and extends to the outer side of the base. A fourth sliding groove is provided on both sides of the inner wall of the second support frame, and a fourth sliding block is slidably disposed in the fourth sliding groove. A connecting block is disposed between two fourth sliding blocks and is fixedly connected to each of the two fourth sliding blocks. The lower end of the fourth threaded column is threaded through the fourth sliding block and rotatably connected to the bottom inner wall of the fourth sliding groove. The upper end of the fourth threaded column rotatably passes through the top inner wall of the fourth sliding groove and extends to the top of the second support frame. The third rotating column is disposed between the two fourth threaded columns and rotatably connected to the upper end of the second support frame. The belt is sleeved on the third rotating column and the fourth threaded column. The connecting block has an installation hole. The tool holder of the grinding tool is fixedly provided with a second limiting block. The tool holder of the grinding tool passes through the installation hole and extends to the outside of the installation hole. The second limiting block contacts the connecting block.

[0008] Furthermore, the rotation of the third rotating column drives the two fourth threaded columns to rotate together via a belt, thereby adjusting the height of the grinding tool. The rotation of the third threaded column can bring the grinding tool closer to the flange bearing, thereby grinding the inner diameter of the inner ring of the flange bearing.

[0009] Preferably, a first handle is fixedly connected to one end of the first threaded post extending from the base and one end of the second threaded post extending from the first limiting block.

[0010] Furthermore, the design of the first handle makes it easier to rotate the first and second threaded columns.

[0011] Preferably, a second handle is fixedly connected to one end of the third threaded column extending from the base and the upper end of the third rotating column.

[0012] Furthermore, the addition of a second handle makes it easier for the third threaded column and the third rotating column to rotate.

[0013] Preferably, the end of the grinding tool shank extending to the outside of the mounting hole is threaded with a third limiting block.

[0014] Furthermore, the third limiting block makes the grinding tool more stable and facilitates its replacement. Beneficial effects

[0015] 1. The rotation of the first threaded column can adjust the distance between the two connecting columns, and the rotation of the second threaded column can adjust the distance between the fixed block and the first limit block, thereby adapting to flange bearings of different specifications and sizes. The extension of the telescopic rod of the electro-hydraulic rod can press and fix the flange bearing with the two pressure rollers. The rotation of the first rotating column can drive the flange bearing to rotate.

[0016] 2. The rotation of the third rotating column drives the two fourth threaded columns to rotate together via a belt, thereby adjusting the height of the grinding tool. The rotation of the third threaded column can bring the grinding tool closer to the flange bearing, thereby grinding the inner diameter of the inner ring of the flange bearing.

[0017] 3. The third limit block makes the grinding tool more stable and facilitates its replacement.

[0018] In this invention, the clamping mechanism and the grinding mechanism work together to adapt to flange bearings of different sizes and specifications without changing the clamping accessories. While fixing the flange bearing, the flange bearing can be rotated, making it easier and more convenient to grind the inner diameter of the inner ring of the flange bearing. This not only improves work efficiency but also effectively reduces the probability of defective products. Attached Figure Description

[0019] Figure 1 This is a three-dimensional perspective view of the present invention. Figure 2 This is a partial structural cross-sectional view of the present invention; Figure 3 This is a partial structural diagram of the present invention; Figure 4 This is a partial structural cross-sectional view of the present invention.

[0020] In the diagram: 1. Base; 2. First support frame; 3. Electro-hydraulic rod; 4. First sliding block; 5. Connecting plate; 6. Motor; 7. Fixing plate; 8. First rotating column; 9. Drive gear; 10. Driven gear; 11. Second rotating column; 12. Pressure roller; 13. Second sliding block; 14. First threaded column; 141. First handle; 15. Fixing block; 16. First limiting block; 17. Second threaded column; 18. Rotating ring; 19. Connecting column; 20. Third sliding block; 201. Second support frame; 21. Third threaded column; 211. Second handle; 22. Fourth sliding block; 23. Connecting block; 24. Fourth threaded column; 25. Third rotating column; 26. Belt; 27. Grinding tool; 271. Second limiting block; 272. Third limiting block. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Example

[0022] Reference Figures 1-4 A grinding device for the inner diameter of the inner ring of a flange bearing includes a base 1, a first support frame 2 and an electric hydraulic rod 3. The first support frame 2 is fixedly disposed on the upper end of the base 1, and the electric hydraulic rod 3 is fixedly connected to the upper end of the first support frame 2. The grinding device also includes a clamping mechanism disposed above the base 1. The clamping mechanism is used to clamp and fix the flange bearing. The grinding mechanism is located above the base 1 and is used to grind the inner diameter of the inner ring of the flange bearing.

[0023] In this utility model, the pressing mechanism includes: two first sliding blocks 4, a connecting plate 5, a motor 6, two fixed plates 7, a first rotating column 8, a driving gear 9, two driven gears 10, two second rotating columns 11, two pressing rollers 12, two second sliding blocks 13, a first threaded column 14, two fixed blocks 15, two first limiting blocks 16, two second threaded columns 17, two rotating rings 18, and two connecting columns 19; First sliding grooves are provided on both inner walls of the first support frame 2. First sliding blocks 4 are slidably disposed within the first sliding grooves. Connecting plates 5 are disposed between the two first sliding blocks 4 and fixedly connected to each of the two first sliding blocks 4. Telescopic holes are provided on the first support frame 2. The telescopic rod of the electric hydraulic rod 3 passes through the telescopic holes and is fixedly connected to the upper end of the connecting plate 5. A motor 6 is fixedly disposed on one side of the upper end of the connecting plate 5. Two fixed plates 7 are symmetrically fixedly disposed at the lower end of the connecting plate 5. One end of the first rotating column 8 is keyed to the output shaft of the motor 6, and the other end is fixedly connected to the driving gear 9. Two second rotating columns 11 are symmetrically disposed. One end of the second rotating column 11 is fixedly disposed through the pressure roller 12 and rotatably connected to one of the fixed plates 7. The other end of the second rotating column 11 rotatably passes through the other fixed plate 7 and is fixedly connected to the driven gear 10. The driven gear 10 and the driving gear 9... The two sliding blocks 13 are symmetrically slidably disposed in the second sliding groove. One end of the first threaded post 14 rotates through the inner wall of one side of the second sliding groove and extends to the outside of the base 1. The other end of the first threaded post 14 is threaded through the two second sliding blocks 13 in sequence and rotates to be connected to the inner wall of the other side of the second sliding groove. The fixing block 15 is fixedly disposed on one side of the upper end of the second sliding block 13. One end of the second threaded post 17 is rotated to be connected to the fixing block 15. The other end of the second threaded post 17 is threaded through the first limiting block 16 and extends to the other side of the first limiting block 16. The first limiting block 16 is slidably connected to the upper end of the second sliding block 13. The first limiting block 16 is provided with a rotating hole. The rotating ring 18 is rotatably disposed in the rotating hole. One end of the connecting post 19 is rotated to be connected to the fixing block 15. The other end of the connecting post 19 slides through the rotating ring 18.

[0024] Furthermore, the rotation of the first threaded column 14 can adjust the distance between the two connecting columns 19, and the rotation of the second threaded column 17 can adjust the distance between the fixing block 15 and the first limiting block 16, thereby adapting to flange bearings of different specifications and sizes. The extension of the telescopic rod of the electric hydraulic rod 3 can press and fix the flange bearing with the two pressing rollers 12, and the rotation of the first rotating column 8 can drive the flange bearing to rotate.

[0025] In this utility model, the grinding mechanism includes: a third sliding block 20, a second support frame 201, a third threaded column 21, two fourth sliding blocks 22, a connecting block 23, a fourth threaded column 24, a third rotating column 25, two belts 26, a grinding cutter 27, and a second limiting block 271. A third sliding groove is provided at the upper end of the base 1. A third sliding block 20 is slidably disposed in the third sliding groove. A second support frame 201 is fixedly disposed at the upper end of the third sliding block 20. One end of a third threaded post 21 is threaded through the third sliding block 20 and rotatably connected to one side of the inner wall of the third sliding groove. The other end of the third threaded post 21 rotatably passes through the other side of the inner wall of the third sliding groove and extends to the outside of the base 1. A fourth sliding groove is provided on both sides of the inner wall of the second support frame 201. A fourth sliding block 22 is slidably disposed in the fourth sliding groove. A connecting block 23 is disposed between two fourth sliding blocks 22 and fixedly connected to each of the two fourth sliding blocks 22. The lower end of the threaded post 4 passes through the fourth sliding block 22 and is rotatably connected to the bottom inner wall of the fourth sliding groove. The upper end of the fourth threaded post 24 rotatably passes through the top inner wall of the fourth sliding groove and extends to the top of the second support frame 201. The third rotating post 25 is disposed between the two fourth threaded posts 24. The third rotating post 25 is rotatably connected to the upper end of the second support frame 201. The belt 26 is sleeved on the third rotating post 25 and the fourth threaded post 24. The connecting block 23 has an installation hole. The tool holder of the grinding tool 27 is fixedly provided with a second limiting block 271. The tool holder of the grinding tool 27 passes through the installation hole and extends to the outside of the installation hole. The second limiting block 271 contacts the connecting block 23.

[0026] Furthermore, the rotation of the third rotating column 25 drives the two fourth threaded columns 24 to rotate together via the belt 26, thereby adjusting the height of the grinding cutter 27. The rotation of the third threaded column 21 can drive the grinding cutter 27 to approach the flange bearing, thereby grinding the inner diameter of the inner ring of the flange bearing.

[0027] In this utility model, the first threaded post 14 extending out of the base 1 and the second threaded post 17 extending out of the first limiting block 16 are both fixedly connected to the first handle 141.

[0028] Furthermore, the first handle 141 makes it easier to rotate the first threaded post 14 and the second threaded post 17.

[0029] In this utility model, the third threaded column 21 extends from one end of the base 1 and the upper end of the third rotating column 25 are both fixedly connected to the second handle 211.

[0030] Furthermore, the second handle 211 makes it easier for the third threaded column 21 and the third rotating column 25 to rotate.

[0031] In this utility model, the end of the shank of the grinding tool 27 extending to the outside of the mounting hole is threadedly connected to a third limiting block 272.

[0032] Furthermore, the third limiting block 272 makes the grinding tool 27 more stable and facilitates its replacement.

[0033] It should be noted that the specific type of electric hydraulic rod 3 and motor 6 used should be selected by those skilled in the art, and the electric hydraulic rod 3 and motor 6 mentioned above are all existing technologies, which will not be elaborated on in this solution.

[0034] The working principle of this utility model: First, connect the equipment requiring power to an external power source. Rotate the first threaded post 14. The rotation of the first threaded post causes the two second sliding blocks 13 to move closer or further apart. The movement of the second sliding blocks 13 causes the fixed block 15, the first limiting block 16, the second threaded post 17, the rotating ring 18, and the connecting post 19 to move together. Rotating the second threaded post 17 causes the first limiting block 16 and the rotating ring 18 to move closer or further away from the fixed block 15. Adjust the distance between the two connecting posts 19 and the distance between the first limiting block 16 and the fixed block 15 according to the required grinding of the flange bearing. Then proceed as follows... Figure 1 As shown, the flange bearing is placed on the two connecting columns 19. Then, the electric hydraulic rod 3 is activated, causing its telescopic rod to extend. This extension of the electric hydraulic rod 3 drives the connecting plate 5, the two first sliding blocks 4, the motor 6, the two fixed plates 7, the first rotating column 8, the driving gear 9, the driven gear 10, the second rotating column 11, and the pressure roller 12 to move downwards together until the pressure roller 12 contacts the flange bearing and presses it down. The motor 6 is then activated, and its output shaft rotates, causing the first rotating column 8 and the driving gear 9 to rotate together. The rotation of the driving gear 9 then drives the driven gear 10, the second rotating column 11, and the pressure roller 12 to rotate together, thereby causing the flange bearing to rotate. The third rotating column 25 rotates, driving the fourth threaded column 24 to rotate together via the belt 26. The rotation of the fourth threaded column 24 causes the fourth sliding block 22 and the connecting block 23 to move up or down together, thereby adjusting the height of the grinding cutter 27. The rotation of the third threaded column 21 causes the third sliding block 20, the second support frame 201, the fourth sliding block 22, the connecting block 23, the fourth threaded column 24, the third rotating column 25, the belt 26, and the grinding cutter 27 to move closer to or away from the flange bearing, bringing the grinding cutter 27 closer to the flange bearing and adjusting the height of the grinding cutter 27 so that the grinding cutter 27 contacts the inner diameter of the flange bearing, thereby grinding the inner diameter of the flange bearing.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A grinding device for the inner diameter of the inner ring of a flange bearing, comprising a base (1), a first support frame (2), and an electro-hydraulic rod (3), wherein the first support frame (2) is fixedly disposed on the upper end of the base (1), and the electro-hydraulic rod (3) is fixedly connected to the upper end of the first support frame (2), characterized in that, The grinding device also includes a clamping mechanism, which is located above the base (1) and is used to clamp and fix the flange bearing. The grinding mechanism is located above the base (1) and is used to grind the inner diameter of the inner ring of the flange bearing. The clamping mechanism includes: two first sliding blocks (4), a connecting plate (5), a motor (6), two fixed plates (7), a first rotating column (8), a driving gear (9), two driven gears (10), two second rotating columns (11), two clamping rollers (12), two second sliding blocks (13), a first threaded column (14), two fixed blocks (15), two first limiting blocks (16), two second threaded columns (17), two rotating rings (18), and two connecting columns (19). The first support frame (2) has first sliding grooves on both inner walls. The first sliding block (4) is slidably disposed in the first sliding groove. The connecting plate (5) is disposed between the two first sliding blocks (4) and fixedly connected to the two first sliding blocks (4) respectively. The first support frame (2) has telescopic holes. The telescopic rod of the electric hydraulic rod (3) passes through the telescopic holes and is fixedly connected to the upper end of the connecting plate (5). The motor (6) is fixedly disposed on one side of the upper end of the connecting plate (5). The two fixed plates (7) are symmetrically fixedly disposed at the lower end of the connecting plate (5). One end of the first rotating column (8) is keyed to the output shaft of the motor (6). The other end of the first rotating column (8) is fixedly connected to the driving gear (9). The two second rotating columns (11) are symmetrically disposed. One end of the second rotating column (11) is fixedly disposed through the pressure roller (12) and rotatably connected to one of the fixed plates (7). The other end of the second rotating column (11) rotatably passes through the other fixed plate (7) and is fixedly connected to the driven gear (10). The driven gear (10) and the driving gear The wheels (9) mesh with each other, and the upper end of the base (1) is provided with a second sliding groove. Two second sliding blocks (13) are symmetrically slidably disposed in the second sliding groove. One end of the first threaded post (14) rotates through one side of the inner wall of the second sliding groove and extends to the outside of the base (1). The other end of the first threaded post (14) sequentially threads through the two second sliding blocks (13) and is rotatably connected to the other side of the inner wall of the second sliding groove. The fixing block (15) is fixedly disposed on one side of the upper end of the second sliding block (13). The second threaded post ( One end of the second threaded post (17) is rotatably connected to the fixed block (15), and the other end of the second threaded post (17) is threaded through the first limiting block (16) and extends to the other side of the first limiting block (16). The first limiting block (16) is slidably connected to the upper end of the second sliding block (13). A rotating hole is provided on the first limiting block (16), and the rotating ring (18) is rotatably set in the rotating hole. One end of the connecting post (19) is rotatably connected to the fixed block (15), and the other end of the connecting post (19) slides through the rotating ring (18).

2. The flange bearing inner race inner diameter grinding device according to claim 1, characterized in that, The grinding mechanism includes: a third sliding block (20), a second support frame (201), a third threaded column (21), two fourth sliding blocks (22), a connecting block (23), a fourth threaded column (24), a third rotating column (25), two belts (26), a grinding tool (27), and a second limiting block (271). A third sliding groove is provided at the upper end of the base (1), and a third sliding block (20) is slidably disposed in the third sliding groove. A second support frame (201) is fixedly disposed at the upper end of the third sliding block (20). One end of a third threaded column (21) is threaded through the third sliding block (20) and rotatably connected to one side of the inner wall of the third sliding groove. The other end of the third threaded column (21) rotatably passes through the other side of the inner wall of the third sliding groove and extends to the outside of the base (1). A fourth sliding groove is provided on both sides of the inner wall of the second support frame (201). A fourth sliding block (22) is slidably disposed in the fourth sliding groove. A connecting block (23) is disposed between the two fourth sliding blocks (22) and fixedly connected to the two fourth sliding blocks (22) respectively. The fourth threaded column (24) The lower end thread passes through the fourth sliding block (22) and is rotatably connected to the bottom inner wall of the fourth sliding groove. The upper end of the fourth threaded column (24) rotatably passes through the top inner wall of the fourth sliding groove and extends to the top of the second support frame (201). The third rotating column (25) is set between the two fourth threaded columns (24). The third rotating column (25) is rotatably connected to the upper end of the second support frame (201). The belt (26) is sleeved on the third rotating column (25) and the fourth threaded column (24). The connecting block (23) has an installation hole. The tool holder of the grinding tool (27) is fixedly set with a second limiting block (271). The tool holder of the grinding tool (27) passes through the installation hole and extends to the outside of the installation hole. The second limiting block (271) contacts the connecting block (23).

3. The device for grinding the inner diameter of the inner ring of a flanged bearing according to claim 1, characterized in that, The first threaded post (14) extending out of the base (1) and the second threaded post (17) extending out of the first limiting block (16) are both fixedly connected to the first handle (141).

4. The flange bearing inner race inner diameter grinding device of claim 2, wherein, The third threaded column (21) extends from one end of the base (1) and the upper end of the third rotating column (25) are both fixedly connected to the second handle (211).

5. The flange bearing inner ring inner diameter grinding device according to claim 1, characterized in that, The shank of the grinding tool (27) extends to one end outside the mounting hole and is threaded with a third limiting block (272).