A precision motor bearing outer ring grinding and over-grinding device

Abstract

This invention discloses a precision motor bearing outer ring grinding and finishing device, relating to the field of bearing processing technology. It includes: a base, with a fixed frame fixedly connected to the top of the base, and a grinding and finishing component housed inside the fixed frame. Through the arrangement of grinding wheel one, grinding wheel shaft, and grinding wheel two, when grinding wheel one and grinding wheel shaft rotate in opposite directions, the outer arc surface and upper and lower end faces of the bearing outer ring can be ground simultaneously. The bearing outer ring rotates under the friction during grinding, and the inner arc surface of the bearing outer ring is simultaneously ground, resulting in higher grinding and finishing efficiency and a more uniform grinding and finishing effect on the bearing outer ring. Through the arrangement of the grinding wheel shaft, the spacing of the grinding points on the outer arc surface of the bearing outer ring can be adjusted simultaneously. When the bearing outer ring has different specifications, thickness, and dimensions, the grinding points on the outer arc surface of the bearing outer ring can be adjusted accordingly.

Description

Technical Field

[0001] This invention relates to the field of bearing processing technology, and more specifically, to a precision motor bearing outer ring grinding and over-grinding device. Background Technology

[0002] Bearing grinding and ultra-precision machining is a key step in precision motor manufacturing. Through grinding and ultra-precision machining, defects on the surface of the workpiece can be removed, thereby significantly improving the rotational accuracy and load-bearing capacity of the bearing.

[0003] In existing technologies, grinding the outer ring of a bearing takes a long time because the outer ring contains multiple surfaces. Therefore, the outer arc surface, inner arc surface, and upper and lower end surfaces of the outer ring need to be ground sequentially. During the process of grinding the multiple surfaces of the outer ring separately, the bearing needs to be transferred between multiple grinding machines. When the specifications of the bearing outer ring being ground change, the specifications of the grinding wheels on the grinding machines also need to be changed sequentially, which is time-consuming and labor-intensive. Furthermore, after the specifications of the bearing outer ring change, the grinding wheel spacing for different surfaces of the outer ring needs to be further adjusted. In the production process of precision motors of different specifications, the spacing of the grinding wheel assembly and the specifications of the grinding wheels on multiple grinding machines need to be changed frequently, which significantly affects the production efficiency of precision motors.

[0004] To solve the above problems, the inventors proposed a precision motor bearing outer ring grinding device. Summary of the Invention

[0005] To solve the above-mentioned technical problems, a precision motor bearing outer ring grinding and over-grinding device is provided.

[0006] To achieve the above objectives, the present invention can be implemented using the following technical solutions:

[0007] The present invention provides a precision motor bearing outer ring grinding and finishing device, comprising: a base, a fixing frame fixedly connected to the top of the base, and a grinding and finishing component disposed inside the fixing frame;

[0008] The grinding assembly includes a fixed plate fixedly connected to the top of a fixed frame. A rotating shaft is rotatably connected to the bottom of the fixed plate. A central shaft is fixedly connected to the bottom of the rotating shaft. A grinding wheel is sleeved in the middle of the central shaft. Slider 1 is symmetrically arranged inside the fixed frame. A rotating shaft 2 is rotatably connected to the bottom of each of the two sliders 1. A grinding wheel shaft is fixedly connected to the bottom of each of the two rotating shafts 2. Two grinding wheels 2 are sleeved on each of the two grinding wheel shafts.

[0009] Preferably, the outer diameter of the grinding wheel is the same as the inner diameter of the bearing outer ring.

[0010] Preferably, the thickness of each of the four grinding wheels is the same as the thickness of the outer ring of the bearing.

[0011] Preferably, a thickness adjustment component is provided inside the grinding wheel shaft. The thickness adjustment component includes symmetrically opened sliding grooves on the grinding wheel shaft. Two sliding grooves are arranged as a group, and a total of four groups are provided. Two groups of sliding grooves are symmetrically arranged on each grinding wheel shaft. A circular groove is opened in both grinding wheel shafts. The sliding grooves are connected to the circular grooves. A double-acting screw is rotatably connected to each of the two circular grooves. A sliding plate is symmetrically threaded on each of the two double-acting screws. A nut seat is symmetrically fixedly connected to both sides of each sliding plate. Two nut seats are arranged as a group. Each group of nut seats is slidably connected to the sliding groove. A screw hole is symmetrically opened on each of the two grinding wheel shafts. A rotating rod is rotatably connected to the bottom of each of the two grinding wheel shafts. The top of each rotating rod passes through the grinding wheel shaft and is fixedly connected to the double-acting screw.

[0012] Preferably, a bolt is provided in the screw hole, and one end of the bolt is threadedly connected to the nut seat.

[0013] Preferably, the fixed frame is internally equipped with a spacing adjustment assembly, which includes a motor 1 fixedly installed on one side of the fixed frame, a bidirectional lead screw 2 rotatably connected inside the fixed frame, the output shaft of the motor 1 passing through the fixed frame and fixedly connected to the bidirectional lead screw 2, two sliders 1 respectively threadedly connected to both ends of the bidirectional lead screw 2, a bevel gear 1 fixedly connected to the surface of the end of the bidirectional lead screw 2 away from the motor 1, a sliding lead screw rotatably connected inside the fixed frame away from the motor 1, a slider 2 threadedly connected to the outer surface of the sliding lead screw, a bevel gear 2 fixedly connected to the end of the sliding lead screw near the bidirectional lead screw 2, the bevel gear 1 meshing with the bevel gear 2, a slide rod fixedly connected inside the fixed frame near the motor 1, a slider 3 slidably connected to the surface of the slide rod, and a slider 4 fixedly connected between slider 2 and slider 3.

[0014] Preferably, the ratio of the number of teeth of bevel gear one to bevel gear two is two to one.

[0015] Preferably, the fixed frame is provided with a rotating assembly, which includes a second motor fixedly mounted on the top of the fixed plate. The output shaft of the second motor passes through the fixed plate and is fixedly connected to a first rotating shaft. A driving gear is fixedly connected to the surface of the first rotating shaft. A driven gear is rotatably connected to the bottom of the fixed plate. The driving gear and the driven gear mesh. A first synchronous wheel is coaxially fixedly connected to the bottom of the driven gear. The surfaces of the two second rotating shafts are both fixedly connected to the second synchronous wheel. A third synchronous wheel is rotatably connected to the bottom of the fourth slider.

[0016] Preferably, a synchronous belt is fitted onto synchronous pulley one, synchronous pulley two, and synchronous pulley three.

[0017] Preferably, the first synchronous pulley, the second synchronous pulley, and the third synchronous pulley are of the same size.

[0018] As described above, the features and advantages of the precision motor bearing outer ring grinding and over-grinding device of the present invention are as follows:

[0019] By setting up grinding wheel one, grinding wheel shaft and grinding wheel two, when grinding wheel one and grinding wheel shaft rotate in opposite directions, the outer arc surface and the upper and lower end faces of the bearing outer ring can be ground simultaneously. During the grinding of the outer arc surface and the upper and lower end faces of the bearing outer ring, the bearing outer ring rotates under the friction during grinding, and the inner arc surface of the bearing outer ring is simultaneously ground. Compared with the method of grinding the inner arc surface and the outer arc surface of the bearing outer ring separately, the grinding efficiency is higher and the grinding effect on the bearing outer ring is more uniform.

[0020] By setting the grinding wheel shafts, the two grinding wheel shafts can move synchronously, allowing the grinding points on the outer arc surface of the bearing outer ring to be adjusted synchronously. When the outer ring of the bearing has different specifications, thickness and size, the grinding points on the outer arc surface of the bearing outer ring can be quickly adjusted accordingly to fit the outer arc surface of the bearing outer ring, thus better adapting to bearing outer rings of different specifications and improving applicability.

[0021] By using grinding wheels of different thicknesses, the grinding wheels for polishing the upper and lower end faces of the bearing outer ring can be flexibly replaced. The grinding wheels can be adjusted according to the different thicknesses of the bearing outer rings of different specifications. Furthermore, the spacing of the grinding wheels is adjustable, which allows for adjustment of the spacing between the grinding points on the upper and lower end faces of the bearing outer ring. This can be further adjusted according to the different widths of the bearings of different specifications. The grinding points are always in close contact with the upper and lower end faces of the bearing, so that the polishing effect on the upper and lower end faces of the bearing can be well adapted to the bearing outer rings of different specifications.

[0022] By setting up the driving gear and the driven gear, when the grinding wheel drives the outer ring of the bearing to rotate through friction, the grinding points on the outer arc surface and the upper and lower end faces of the bearing outer ring are reversed. During the grinding process on the outer arc surface and the upper and lower end faces of the bearing outer ring, the outer ring of the bearing is driven to rotate through friction, so that its inner arc surface is simultaneously ground. Furthermore, after adjusting the spacing of the grinding points on the outer arc surface of the bearing outer ring, the inner and outer grinding points of the bearing outer ring always have the same speed and opposite direction, so as to improve the uniformity of the inner and outer grinding of the bearing outer ring. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a bottom-view perspective view of the overall structure of the present invention;

[0025] Figure 3 This is a three-dimensional schematic diagram of the grinding wheel shaft structure shown in this invention;

[0026] Figure 4 As shown in this invention Figure 3 Enlarged view of point A in the middle;

[0027] Figure 5 This is a three-dimensional cross-sectional view of the internal structure of the grinding wheel shaft shown in this invention;

[0028] Figure 6 This is a three-dimensional schematic diagram of the bidirectional lead screw 2 and slider 1 structure shown in this invention;

[0029] Figure 7 As shown in this invention Figure 6 Enlarged view at point B in the middle;

[0030] Figure 8 This is a three-dimensional schematic diagram of the driving gear and driven gear structure shown in this invention;

[0031] Figure 9 This is a three-dimensional schematic diagram of the driven gear and synchronous pulley structure shown in this invention;

[0032] Figure 10 This is a three-dimensional schematic diagram of the structure of synchronous pulley one, synchronous pulley three, etc., as shown in this invention.

[0033] In this invention, the reference numerals are: 1, base; 2, mounting bracket;

[0034] Grinding and polishing components: 301, fixed plate; 302, rotating shaft one; 303, central shaft; 304, grinding wheel one; 305, slider one; 306, rotating shaft two; 307, grinding wheel shaft; 308, grinding wheel two;

[0035] Thickness adjustment assembly: 401, sliding groove; 402, circular groove; 403, double-acting lead screw; 404, sliding plate; 405, nut seat; 406, screw hole; 407, rotating rod;

[0036] Spacing adjustment components: 501, Motor 1; 502, Bidirectional lead screw 2; 503, Bevel gear 1; 504, Sliding lead screw; 505, Bevel gear 2; 506, Slider 2; 507, Sliding rod; 508, Slider 3; 509, Slider 4;

[0037] Rotating components: 601, Motor 2; 602, Drive gear; 603, Driven gear; 604, Synchronous pulley 1; 605, Synchronous pulley 2; 606, Synchronous pulley 3. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0039] The embodiments provided by the present invention will be described in detail below:

[0040] A precision motor bearing outer ring grinding and over-grinding device, such as Figures 1-3 As shown, it includes: a base 1, a fixing frame 2 fixedly connected to the top of the base 1, and a grinding component disposed inside the fixing frame 2;

[0041] The grinding assembly includes a fixed plate 301 fixedly connected to the top of the fixed frame 2. A rotating shaft 302 is rotatably connected to the bottom of the fixed plate 301. A central shaft 303 is coaxially fixedly connected to the bottom of the rotating shaft 302. A grinding wheel 304 is sleeved in the middle of the central shaft 303. Slider 305 is symmetrically arranged inside the fixed frame 2. A rotating shaft 306 is rotatably connected to the bottom of each of the two sliders 305. A grinding wheel shaft 307 is fixedly connected to the bottom of each of the two rotating shafts 306. Two grinding wheels 308 are sleeved on each of the two grinding wheel shafts 307. The outer diameter of the grinding wheel 304 is the same as the inner diameter of the bearing outer ring. The thickness of the four grinding wheels 308 is the same as the thickness of the bearing outer ring.

[0042] It should be added that grinding wheel 304 is used to grind the inner arc surface of the bearing outer ring, the surface of grinding wheel shaft 307 is used to grind the outer arc surface of the bearing outer ring, and grinding wheel 308 is used to grind the upper and lower end faces of the bearing outer ring.

[0043] Specifically, when the central shaft 303 and the grinding wheel shaft 307 rotate in different directions, the outer ring of the bearing, which is sleeved on the first grinding wheel 304, rotates synchronously with the first grinding wheel 304 under the friction between the inner arc surface and the first grinding wheel 304. Then, the second grinding wheel 307 and the second grinding wheel 308 on it grind the outer arc surface and the upper and lower end faces of the outer ring of the bearing. During this process, the second grinding wheel 307 and the second grinding wheel 308 generate friction on the outer ring of the bearing, causing the outer ring of the bearing to rotate relative to the first grinding wheel 304. This allows the first grinding wheel 304 to grind the inner arc surface of the outer ring of the bearing synchronously, thereby achieving the effect of grinding the outer arc surface, inner arc surface and upper and lower end faces of the outer ring of the bearing simultaneously. Compared with the method of grinding the inner arc surface and outer arc surface of the bearing outer ring separately, the grinding efficiency is higher and the grinding effect on the outer ring of the bearing is more uniform.

[0044] Furthermore, such as Figures 2-5As shown, a thickness adjustment assembly is provided inside the grinding wheel shaft 307. The thickness adjustment assembly includes symmetrically formed sliding grooves 401 on the grinding wheel shaft 307. Two sliding grooves 401 are arranged as a group, and a total of four groups are provided. Two groups of sliding grooves 401 are symmetrically arranged on each grinding wheel shaft 307. A circular groove 402 is formed inside each of the two grinding wheel shafts 307. The sliding grooves 401 are connected to the circular grooves 402. A double-acting lead screw 403 is rotatably connected to each of the two circular grooves 402. A sliding plate is symmetrically threaded onto each of the two double-acting lead screws 403. 404. Nut seats 405 are symmetrically fixedly connected to both sides of each sliding plate 404. Two nut seats 405 form a group. Each group of nut seats 405 is slidably connected to the sliding groove 401. Each grinding wheel 308 is symmetrically provided with screw holes 406. Rotating rods 407 are rotatably connected to the bottom of the two grinding wheel shafts 307. The top ends of the two rotating rods 407 pass through the grinding wheel shafts 307 and are fixedly connected to the double-acting screw 403. Bolts are provided in the screw holes 406. One end of the bolt is threaded to the nut seat 405.

[0045] It should be added that the grinding wheel 308 is mounted on the sliding plate 404 by means of bolts and nut seat 405.

[0046] Specifically, when installing the second grinding wheel 308 for grinding different bearing outer rings, first select the second grinding wheel 308 with the same thickness as the bearing outer ring and the first grinding wheel 304 with the same width as the bearing outer ring. Then, put the two second grinding wheels 308 for grinding the upper end face of the bearing outer ring onto the grinding wheel shaft 307, and align the screw hole 406 on the second grinding wheel 308 with the upper nut seat 405. Then, use bolts to install the second grinding wheel 308 onto the nut seat 405 and the sliding plate 404. After the second grinding wheel 308 is installed, put the first grinding wheel 304 onto the central shaft 303, and then put the bearing outer ring onto the first grinding wheel 304. Then, put the second grinding wheel 308 for grinding the lower end face of the bearing outer ring onto the grinding wheel shaft 307, and use bolts to connect the second grinding wheel 308 to the circular groove. The lower sliding plate 404 inside 402 is fixedly connected to the nut seat 405. At this time, the operator uses his hand to rotate the two rotating rods 407 respectively, so that the rotating rods 407 drive the double-acting screw 403 to rotate. The double-acting screw 403 drives the two sliding plates 404 on it to slide towards the middle of the double-acting screw 403 through the double-acting thread. This causes the nut seat 405 to slide in the sliding groove 401 towards the side closer to the middle of the double-acting screw 403, thereby driving the grinding wheel 308 to move towards the middle of the central shaft 303. This allows the grinding wheel 308 to contact the upper and lower end faces of the bearing outer ring, so that the upper and lower end faces of the bearing outer ring can be ground when the grinding wheel 308 rotates. By synchronously adjusting the spacing of the grinding wheel 308, the grinding device can adapt to bearing outer rings of different sizes.

[0047] Furthermore, such as Figures 1-3 as well as Figures 6 to 10As shown, the fixed frame 2 has a spacing adjustment assembly inside. The spacing adjustment assembly includes a motor 501 fixedly installed on one side of the fixed frame 2. A double-acting lead screw 502 is rotatably connected inside the fixed frame 2. The output shaft of the motor 501 passes through the fixed frame 2 and is fixedly connected to the double-acting lead screw 502. Two sliders 305 are threadedly connected to both ends of the double-acting lead screw 502. A bevel gear 503 is fixedly connected to the surface of the end of the double-acting lead screw 502 away from the motor 501. The side of the fixed frame 2 away from the motor 501 is rotatably connected to... There is a sliding screw 504, and a slider 506 is threadedly connected to the outer surface of the sliding screw 504. A bevel gear 505 is fixedly connected to one end of the sliding screw 504 near the two-way screw 502. A bevel gear 503 meshes with the bevel gear 505. A slide rod 507 is fixedly connected to the inside of the fixed frame 2 near the motor 501. A slider 508 is slidably connected to the surface of the slide rod 507. A slider 509 is fixedly connected between the slider 506 and the slider 508. The tooth ratio of the bevel gear 503 to the bevel gear 505 is 2:1.

[0048] It should be added that the gear ratio of bevel gear 1 503 to bevel gear 2 505 is 2:1, so that when bevel gear 1 503 rotates once, bevel gear 2 505 rotates twice. This is existing technology and will not be elaborated further here. The pitch of the double-acting lead screw 2 502 and the sliding lead screw 504 is the same, so that when the double-acting lead screw 2 502 and the sliding lead screw 504 rotate at the same speed, the moving speed of slider 1 305 and slider 2 506 is the same. This is existing technology and will not be elaborated further here.

[0049] Specifically, when the outer ring of the bearing being ground has a different thickness depending on its specifications, and the distance between the grinding wheel shaft 307 and the central shaft 303 needs to be adjusted, the motor 1 501 starts and drives the double-acting lead screw 2 502 to rotate. The double-acting lead screw 2 502 drives the two sliders 1 305 to move closer to or further away from the central shaft 303 through the thread. When the sliders 1 305 move, they drive the grinding wheel shaft 307 at their bottom to move closer to or further away from the central shaft 303. This allows the two grinding wheel shafts 307 to adapt to gear outer rings of different thicknesses or sizes, improving the applicability of the grinding device.

[0050] Furthermore, such as Figure 1 as well as Figure 6 , Figures 8-10As shown, the fixed frame 2 has a rotating assembly inside. The rotating assembly includes a second motor 601 fixedly mounted on the top of the fixed plate 301. The output shaft of the second motor 601 passes through the fixed plate 301 and is fixedly connected to the first rotating shaft 302. A driving gear 602 is fixedly connected to the surface of the first rotating shaft 302. A driven gear 603 is rotatably connected to the bottom of the fixed plate 301. The driving gear 602 and the driven gear 603 mesh. A first synchronous pulley 604 is coaxially fixedly connected to the bottom of the driven gear 603. A second synchronous pulley 605 is fixedly connected to the surface of each of the two second rotating shafts 306. A third synchronous pulley 606 is rotatably connected to the bottom of the fourth slider 509. A synchronous belt is fitted on the first synchronous pulley 604, the second synchronous pulley 605, and the third synchronous pulley 606. The first synchronous pulley 604, the second synchronous pulley 605, and the third synchronous pulley 606 are the same size.

[0051] It should be added that the dimensions of synchronous pulley 1 604, synchronous pulley 2 605 and synchronous pulley 3 606 are the same. When the distance between synchronous pulley 2 605 and synchronous pulley 3 606 changes, causing the shape of the synchronous belt to change, the rotational speed of synchronous pulley 2 605 and synchronous pulley 3 606 driven by the synchronous belt remains unchanged. This is existing technology and will not be elaborated on here.

[0052] Specifically, when motor 2 601 starts and drives rotating shaft 1 302 to rotate, rotating shaft 1 302 drives its bottom central shaft 303 to rotate synchronously. Under the meshing action of driving gear 602 and driven gear 603, synchronous pulley 1 604 rotates in the opposite direction to the central shaft 303. Subsequently, synchronous pulley 1 604 drives the synchronous belt to rotate and drives synchronous pulley 2 605 and synchronous pulley 3 606 to rotate, so that the rotation direction of the two synchronous pulleys 2 605 is opposite to that of rotating shaft 1 302, thus the grinding wheel shaft 307 and grinding wheel 2 306 rotate in the opposite direction to the central shaft 302. The rotation direction of 08 is opposite to that of grinding wheel 304, thus simultaneously grinding the inner arc surface, outer arc surface, and upper and lower end faces of the bearing outer ring; when the double-acting screw 502 drives the slider 305 to move to adjust the spacing of the grinding wheel shaft 307, the rotating shaft 306 at the bottom of the slider 305 moves synchronously. At this time, the bevel gear 503 on the double-acting screw 502 drives the sliding screw 504 to rotate through the bevel gear 505, so that the sliding screw 504 drives the slider 506 to slide under the action of the thread, and at the same time, the sliding rod 5 Under the sliding engagement of slider 07 and slider 3 508, slider 2 506 drives slider 4 509 to move. Furthermore, with the bevel gear 1 503 and bevel gear 2 505 having a gear ratio of 2:1, the two sliders 1 305, under the action of the double-acting lead screw 2 502, synchronously approach the middle of the double-acting lead screw 2 502. Sliding slider 2 506 then drives slider 4 509 to slide away from the double-acting lead screw 2 502, and the sliding distance is the sum of the sliding distances of the two sliders 1 305. When the two sliders 1 305 are in the double-acting lead screw... When the synchronous pulley 509 moves away from the center of the two-way lead screw 502 under the action of the two-way lead screw 502, the slider 509 slides towards the two-way lead screw 502, and the sliding distance is the sum of the sliding distances of the two sliders 305. Thus, when the slider 305 drives the grinding wheel shaft 307 to adjust the spacing, the synchronous pulley 606 moves synchronously according to the moving distance of the two synchronous pulleys 605, thereby always keeping the synchronous belt taut, and thus ensuring that the synchronous pulley 605 can always rotate synchronously when the synchronous pulley 604 drives the synchronous belt to rotate.

[0053] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A precision motor bearing outer ring grinding and over-grinding device, characterized in that, include: The base (1) has a fixed frame (2) fixedly connected to its top, and the fixed frame (2) has a grinding component inside. The grinding assembly includes a fixed plate (301) fixedly connected to the top of the fixed frame (2), a rotating shaft (302) rotatably connected to the bottom of the fixed plate (301), a central shaft (303) fixedly connected to the bottom of the rotating shaft (302), a grinding wheel (304) sleeved in the middle of the central shaft (303), a slider (305) symmetrically arranged inside the fixed frame (2), a rotating shaft (306) rotatably connected to the bottom of each slider (305), a grinding wheel shaft (307) fixedly connected to the bottom of each rotating shaft (306), and two grinding wheels (308) sleeved on each grinding wheel shaft (307). A thickness adjustment assembly is provided inside the grinding wheel shaft (307). The thickness adjustment assembly includes sliding grooves (401) symmetrically opened on the grinding wheel shaft (307). The sliding grooves (401) are arranged in pairs, with a total of four sets. Two sets of sliding grooves (401) are symmetrically arranged on each grinding wheel shaft (307). A circular groove (402) is opened in both grinding wheel shafts (307). The sliding grooves (401) are connected to the circular grooves (402). A double-acting screw (403) is rotatably connected in both circular grooves (402). The two double-acting screws (403) are connected to each other. Each grinding wheel (308) is symmetrically threaded with a sliding plate (404), and each sliding plate (404) is symmetrically fixed with a nut seat (405) on both sides. The nut seats (405) are in groups of two, and each group of nut seats (405) is slidably connected to the sliding groove (401). Each grinding wheel (308) is symmetrically provided with a screw hole (406). The bottom of each of the two grinding wheel shafts (307) is rotatably connected with a rotating rod (407). The top of each of the two rotating rods (407) passes through the grinding wheel shaft (307) and is fixedly connected to the double-acting screw (403). The fixed frame (2) is equipped with a spacing adjustment assembly, which includes a motor (501) fixedly installed on one side of the fixed frame (2). A double-acting lead screw (502) is rotatably connected inside the fixed frame (2). The output shaft of the motor (501) passes through the fixed frame (2) and is fixedly connected to the double-acting lead screw (502). Two sliders (305) are threadedly connected to both ends of the double-acting lead screw (502). A bevel gear (503) is fixedly connected to the surface of the end of the double-acting lead screw (502) away from the motor (501). The interior of the fixed frame (2) is further away from the motor (501). 1) A sliding screw (504) is rotatably connected to one side of the sliding screw (504). A slider two (506) is threadedly connected to the outer surface of the sliding screw (504). A bevel gear two (505) is fixedly connected to one end of the sliding screw (504) near the two-way screw two (502). A bevel gear one (503) meshes with a bevel gear two (505). A slide rod (507) is fixedly connected to the inside of the fixed frame (2) near the motor one (501). A slider three (508) is slidably connected to the surface of the slide rod (507). A slider four (509) is fixedly connected between slider two (506) and slider three (508). The fixed frame (2) is equipped with a rotating assembly, which includes a second motor (601) fixedly mounted on the top of the fixed plate (301). The output shaft of the second motor (601) passes through the fixed plate (301) and is fixedly connected to the first rotating shaft (302). The surface of the first rotating shaft (302) is fixedly connected to the driving gear (602). The bottom of the fixed plate (301) is rotatably connected to the driven gear (603). The driving gear (602) meshes with the driven gear (603). The bottom of the driven gear (603) is coaxially fixedly connected to the first synchronous wheel (604). The surfaces of the two second rotating shafts (306) are fixedly connected to the second synchronous wheel (605). The bottom of the fourth slider (509) is rotatably connected to the third synchronous wheel (606). Synchronous belts are fitted together on synchronous pulley one (604), synchronous pulley two (605), and synchronous pulley three (606); The outer diameter of the grinding wheel (304) is the same as the inner diameter of the outer ring of the bearing.

2. The precision motor bearing outer ring grinding and over-grinding device according to claim 1, characterized in that, The thickness of all four grinding wheels (308) is the same as the thickness of the outer ring of the bearing.

3. The precision motor bearing outer ring grinding and over-grinding device according to claim 2, characterized in that, A bolt is installed in the screw hole (406), and one end of the bolt is threaded to the nut seat (405).

4. The precision motor bearing outer ring grinding and over-grinding device according to claim 3, characterized in that, The ratio of the number of teeth of bevel gear 1 (503) to bevel gear 2 (505) is 2 to 1.

5. The precision motor bearing outer ring grinding and over-grinding device according to claim 4, characterized in that, Synchronous pulley one (604), synchronous pulley two (605) and synchronous pulley three (606) have the same size.

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