Mirror grinding tool for outer raceway of bearing inner ring

Abstract

The utility model relates to a bearing inner ring outer raceway mirror surface grinding tool which comprises a base, a first positioning piece rotationally connected to the base, a sliding seat slidably connected to the base, a second positioning piece rotationally connected to the sliding seat and a driving piece for pushing the sliding seat to reciprocate, and the first positioning piece and the second positioning piece are coaxially arranged. The ends, close to each other, of the outer walls of the first positioning piece and the second positioning piece incline towards the axis direction. The bearing is clamped by the first positioning piece and the second positioning piece together, and the axis of the bearing coincides with the axis of the first positioning piece and the axis of the second positioning piece through the inclined side walls of the first positioning piece and the second positioning piece, so that the stable positioning of the bearing is realized.

Description

Technical Field

[0001] The present application relates to the technical field of bearing grinding tools, and in particular to a mirror grinding tool for the outer raceway of an inner ring of a bearing. Background Art

[0002] During the processing of the bearing, the raceways of the inner and outer rings need to be polished to reduce the roughness of the raceways so that the rolling of the balls in the raceways can remain smooth. The grinding of the raceways of the inner and outer rings of the bearings is usually carried out using a grinder, and the position of the bearing also needs to be limited before grinding.

[0003] A Chinese patent with application number CN202021428500.2 discloses a bearing grinding machine, including a frame, a workbench and an adjustable grinding mechanism. The workbench is rotatably connected to the frame, and a power structure for driving the workbench to rotate is fixedly connected to the bottom of the frame. A chassis is fixedly connected to the workbench, and a tooling structure for clamping different bearing rings is fixedly connected to the chassis. The tooling structure includes an adjusting rod, an adjusting block, a sliding block and a plurality of clamping blocks. The adjusting rod is rotatably connected to the chassis, the sliding block is sleeved on the adjusting rod, the clamping block is circumferentially evenly hinged on the adjusting block, and the adjusting block is sleeved on the adjusting rod for clamping the sliding block.

[0004] The above scheme uses internal tensioning to limit the position of the inner ring of the bearing, but the adjustment rod is relatively slender and keeps rotating, which will cause certain deformation after long-term use, resulting in the coaxiality between the inner ring of the bearing and the tooling cannot be guaranteed, thereby affecting the accuracy of the final processed inner ring of the bearing.

[0005] Therefore, it is necessary to propose a new technical solution to solve the above problems. Utility Model Content

[0006] In order to prevent the position of the bearing inner ring from changing during clamping and processing, and to improve the processing accuracy of the bearing inner ring, the present application provides a mirror grinding tool for the outer raceway of the bearing inner ring.

[0007] The present application provides a bearing inner ring outer raceway mirror grinding tool, which adopts the following technical solution:

[0008] A tool for mirror grinding the outer raceway of an inner ring of a bearing, comprising a base, a first positioning member rotatably connected to the base, a sliding seat slidably connected to the base, a second positioning member rotatably connected to the sliding seat, and a driving member for pushing the sliding seat to reciprocate, wherein the first positioning member and the second positioning member are coaxially arranged, and the ends of the outer walls of the first positioning member and the second positioning member that are close to each other are inclined toward the axial direction.

[0009] By adopting the above technical solution, the first positioning member and the second positioning member are used to clamp the bearing together, and the inclined side walls of the first positioning member and the second positioning member are used to make the axis of the bearing coincide with the axis of the first positioning member and the second positioning member, thereby achieving stable positioning of the bearing.

[0010] Optionally: an extension shaft is coaxially fixed on the end surface of the first positioning member close to the second positioning member, the diameter of the extension shaft is smaller than the inner diameter of the bearing inner ring, and the length of the extension shaft is smaller than the axial length of the bearing inner ring.

[0011] By adopting the above technical solution, the bearing can be placed on the extension shaft before the first positioning member and the second positioning member clamp the bearing, and then the second positioning member moves toward the first positioning member and clamps the bearing in place.

[0012] Optionally, a positioning groove is coaxially formed on the end surface of the extension shaft away from the first positioning member, and a positioning rod is fixed to the end surface of the second positioning member close to the first positioning member, and the positioning rod is inserted into the positioning groove.

[0013] By adopting the above technical solution, the first positioning member and the second positioning member can maintain a coaxial state by utilizing the cooperation between the positioning rod and the positioning groove, thereby improving the stability of the first positioning member and the second positioning member.

[0014] Optionally: the end surface of the positioning rod away from the second positioning member is spherical.

[0015] By adopting the above technical solution, the area of ​​the opening of the positioning rod toward the positioning groove is reduced, making it easier for the positioning rod to be inserted into the positioning groove.

[0016] Optionally: a plurality of exhaust holes connected to the positioning grooves are circumferentially formed on the outer wall of the extension shaft.

[0017] By adopting the above technical solution, when the positioning rod is tightly matched and inserted into the positioning groove, the air in the positioning groove can be discharged through the exhaust hole, and the air in the positioning groove is not easily compressed, thereby making the use of the positioning rod and the positioning groove more convenient.

[0018] Optionally: a plurality of support bars are fixed circumferentially to the outer wall of the extension shaft, and the support bars abut against the inner wall of the inner ring of the bearing.

[0019] By adopting the above technical solution, the bearing is supported by the support bar so that the axis of the bearing can be close to the axis of the extension shaft, thereby reducing the distance the bearing moves when the first positioning member and the second positioning member clamp the bearing, thereby reducing wear.

[0020] Optionally: the end of the support bar away from the first positioning member is flush with the end of the extension shaft away from the first positioning member, and the end surface of the support bar away from the first positioning member is provided with a guide slope, and the end of the guide slope away from the axis of the extension shaft is inclined toward the direction of the first positioning member.

[0021] By adopting the above technical solution, the longest distance between the support bars is shortened by utilizing the guiding inclined surface, so that the bearing can be more easily sleeved on the support bar.

[0022] Optionally: the base is also rotatably connected to two positioning wheels, and the upper ends of the positioning wheels are respectively abutted against the lower ends of the first positioning member and the second positioning member.

[0023] By adopting the above technical solution, the first positioning member and the second positioning member are supported by the positioning wheel, so that the axes of the first positioning member and the second positioning member can still remain overlapped during the process of clamping and grinding the bearing.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. Clamp the bearing using the first positioning member and the second positioning member, and use the inclined surface to keep the axis of the bearing coincident with the first positioning member and the second positioning member, so that the axis of the bearing can remain unchanged during the grinding process, and the machining accuracy of the bearing is not easily affected;

[0026] 2. Use the support bar to make the axis of the unclamped bearing close to the axis of the extension shaft, thereby reducing the distance the bearing moves after being clamped and reducing the wear of the first positioning member and the second positioning member. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of an embodiment of the present application;

[0028] Figure 2 This is a schematic diagram for illustrating the connection relationship between the positioning groove and the positioning rod according to an embodiment of the present application.

[0029] In the figure, 1, base; 11, sliding seat; 12, driving member; 13, positioning wheel; 2, first positioning member; 21, extension shaft; 211, positioning groove; 212, exhaust hole; 22, support bar; 221, guide slope; 3, second positioning member; 31, positioning rod. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with the accompanying drawings.

[0031] The present application discloses a mirror grinding tool for the outer raceway of the inner ring of a bearing, such as Figure 1As shown, it includes a base 1, a first positioning member 2 rotatably connected to the base 1, a sliding seat 11 slidably arranged on the base 1, a second positioning member 3 rotatably connected to the sliding seat 11, and a driving member 12 for pushing the sliding seat 11 to move back and forth. The rotation axes of the first positioning member 2 and the second positioning member 3 are both arranged horizontally, and the rotation axes of the two coincide. The sliding seat 11 is arranged on the base 1 through the cooperation of the guide rail and the slider, the second positioning member 3 is rotatably connected to the sliding seat 11 through the bearing, and the driving member 12 is selected as a cylinder in this embodiment. The driving member 12 is fixed to the base 1 with bolts, and the free end of the driving member 12 is connected to the end surface of the sliding seat 11 away from the first positioning member 2, thereby driving the second positioning member 3 to approach or move away from the first positioning member 2. The first positioning member 2 and the second positioning member 3 are both cylindrically arranged, and the ends of the outer walls of the first positioning member 2 and the second positioning member 3 that are close to each other are inclined toward the direction of the rotation axis, so that the ends of the first positioning member 2 and the second positioning member 3 that are close to each other are truncated in a cone shape. When the inner ring of the bearing is placed between the first positioning member 2 and the second positioning member 3, the truncated cone-shaped parts of the first positioning member 2 and the second positioning member 3 can be inserted into the inner ring of the bearing to limit the position of the inner ring of the bearing.

[0032] like Figure 2 As shown, when the inner ring of the bearing is placed between the first positioning member 2 and the second positioning member 3, the first positioning member 2 and the second positioning member 3 have not yet clamped the inner ring of the bearing. At this time, it is still necessary to manually support the position of the inner ring of the bearing, which is still troublesome. Therefore, an extension shaft 21 arranged in a cylindrical shape is also integrally formed on the end face of the first positioning member 2 close to the second positioning member 3. The axial length of the extension shaft 21 is less than the axial length of the bearing, and when the first positioning member 2 and the second positioning member 3 are close to each other and clamp the bearing, there is still a gap between the extension shaft 21 and the second positioning member 3. The diameter of the extension shaft 21 is also smaller than the diameter of the bearing, so that it is more convenient to place the bearing on the extension shaft 21, and it will not affect the subsequent positioning of the bearing by the first positioning member 2 and the second positioning member 3.

[0033] In order to ensure that the first positioning member 2 and the second positioning member 3 can maintain a coaxial state when they are close to each other and clamp the bearing, a positioning groove 211 is coaxially provided on the end surface of the first positioning member 2 in the extension shaft 21, and a positioning rod 31 is integrally formed on the end surface of the second positioning member 3 close to the first positioning member 2, and the positioning rod 31 can be inserted into the positioning groove 211, thereby limiting the coaxiality of the first positioning member 2 and the second positioning member 3. The end surface of the positioning rod 31 close to the first positioning member 2 is spherical, so that when the positioning rod 31 is inserted into the positioning groove 211, the spherical end surface can guide the movement of the positioning rod 31, so that the positioning rod 31 is easier to insert into the positioning groove 211.

[0034] Since the positioning groove 211 is arranged as a blind hole, when the positioning rod 31 is inserted into the positioning groove 211, if the positioning rod 31 and the positioning groove 211 fit tightly, the air will be compressed in the positioning groove 211 and affect the insertion process of the positioning rod 31 into the positioning groove 211. Therefore, a plurality of exhaust holes 212 connected to the positioning groove 211 are circumferentially opened on the outer wall of the extension shaft 21. The exhaust holes 212 are used to realize the connection between the positioning groove 211 and the outside world. During the process of inserting the positioning rod 31 into the positioning groove 211, the gas can be discharged from the exhaust holes 212.

[0035] A plurality of support strips 22 are circumferentially adhered to the outer wall of the extension shaft 21. The support strips 22 are made of engineering plastics, and the end face of the support strip 22 away from the extension shaft 21 is arranged in an arc shape and fits the inner wall of the bearing. The end face of the support strip 22 away from the first positioning member 2 is flush with the end face of the extension shaft 21 away from the first positioning member 2, and the end face of the first positioning member 2 away from the first positioning member 2 is also provided with a guide slope 221, and the end of the guide slope 221 away from the extension shaft 21 is inclined toward the direction of the first positioning member 2, and the guide slope 221 transitions to the arc of the side wall of the support strip 22 away from the extension shaft 21. When the bearing is sleeved on the extension shaft 21, the support strip 22 abuts against the inner wall of the bearing, and then the movement of the bearing is reduced when the first positioning member 2 and the second positioning member 3 position the inner ring of the bearing, thereby reducing the wear between the bearing, the first positioning member 2 and the second positioning member 3.

[0036] like Figure 1 As shown, since the first positioning member 2 and the second positioning member 3 will be subjected to the pressure applied by the grinding wheel when the first positioning member 2 and the second positioning member 3 clamp the inner ring of the bearing and grind it, the base 1 is also rotatably connected with two positioning wheels 13, and the positioning wheels 13 are located below the axes of the first positioning member 2 and the second positioning member 3. The upper ends of the positioning wheels 13 are respectively abutted against the lower ends of the first positioning member 2 and the second positioning member 3, thereby supporting the first positioning member 2 and the second positioning member 3, so that the first positioning member 2 and the second positioning member 3 are not easily subject to changes in coaxiality when subjected to the pressure applied by the grinding wheel.

[0037] The implementation principle of this embodiment is: before processing the bearing, the inner ring of the bearing is first sleeved on the extension shaft 21 and abutted against the inclined side wall of the first positioning member 2, and when sleeved on the extension shaft 21, the support bar 22 abuts against the inner ring of the bearing, and then the second positioning member 3 moves toward the first positioning member 2, and after the positioning rod 31 is inserted into the positioning groove 211, the second positioning member 3 abuts against the inner ring of the bearing, thereby clamping the inner ring of the bearing in position.

[0038] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A mirror grinding tool for the outer raceway of the inner ring of a bearing, characterized in that: The invention comprises a base (1), a first positioning member (2) rotatably connected to the base (1), a sliding seat (11) slidably connected to the base (1), a second positioning member (3) rotatably connected to the sliding seat (11), and a driving member (12) for driving the sliding seat (11) to move back and forth, wherein the first positioning member (2) and the second positioning member (3) are coaxially arranged, and the ends of the outer walls of the first positioning member (2) and the second positioning member (3) that are close to each other are inclined toward the axial direction.

2. A tool for mirror grinding of the outer raceway of the inner ring of a bearing according to claim 1, characterized in that: An extension shaft (21) is coaxially fixed on the end surface of the first positioning member (2) close to the second positioning member (3); the diameter of the extension shaft (21) is smaller than the inner diameter of the bearing inner ring; and the length of the extension shaft (21) is smaller than the axial length of the bearing inner ring.

3. A mirror grinding tool for outer raceway of inner ring of a bearing according to claim 2, characterized in that: A positioning groove (211) is coaxially formed on the end surface of the extension shaft (21) away from the first positioning member (2), and a positioning rod (31) is fixed to the end surface of the second positioning member (3) close to the first positioning member (2), wherein the positioning rod (31) is inserted into the positioning groove (211).

4. A mirror grinding tool for outer raceway of inner ring of a bearing according to claim 3, characterized in that: The end surface of the positioning rod (31) away from the second positioning member (3) is spherical.

5. The tool for mirror grinding the outer raceway of the inner ring of a bearing according to claim 3, characterized in that: A plurality of exhaust holes (212) communicating with the positioning grooves (211) are circumferentially formed on the outer wall of the extension shaft (21).

6. The tool for mirror grinding the outer raceway of the inner ring of a bearing according to claim 2, characterized in that: A plurality of support strips (22) are fixed circumferentially on the outer wall of the extension shaft (21), and the support strips (22) abut against the inner wall of the inner ring of the bearing.

7. A tool for mirror grinding of outer raceway of inner ring of bearing according to claim 6, characterized in that: The end of the support bar (22) away from the first positioning member (2) is flush with the end of the extension shaft (21) away from the first positioning member (2); the end surface of the support bar (22) away from the first positioning member (2) is provided with a guide slope (221); and one end of the guide slope (221) away from the axis of the extension shaft (21) is inclined in the direction of the first positioning member (2).

8. The tool for mirror grinding the outer raceway of the inner ring of a bearing according to claim 1, characterized in that: The base (1) is also rotatably connected to two positioning wheels (13), and the upper ends of the positioning wheels (13) are respectively in contact with the lower ends of the first positioning member (2) and the second positioning member (3).

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