CN210938276U - Centering shaft for supporting bearing inner ring during super-finishing - Google Patents
Centering shaft for supporting bearing inner ring during super-finishing Download PDFInfo
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- CN210938276U CN210938276U CN201921718845.9U CN201921718845U CN210938276U CN 210938276 U CN210938276 U CN 210938276U CN 201921718845 U CN201921718845 U CN 201921718845U CN 210938276 U CN210938276 U CN 210938276U
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Abstract
The utility model relates to a be used for supporting bearing inner race's centering shaft during super finishing belongs to bearing processing machinery technical field. The front end of the centering shaft body is an extension shaft, a bearing is sleeved on the extension shaft, a support piece is sleeved on the outer ring of the bearing and rotates around the extension shaft, and a threaded hole, a roller shaft hole and a centering shaft fixing threaded hole are formed in the centering shaft body. The back side of the inner ring of the supporting piece is provided with a shaft shoulder, the extension shaft is provided with a step, the step and the shaft shoulder respectively abut against the back end of the bearing to form a limit for preventing the bearing from moving backwards, the end cover is fixedly arranged on the end face of the front side of the supporting piece, the end face of the front end of the extension shaft is fixedly provided with a gasket, and the gasket and the end cover respectively partially abut against the front end of the bearing to form a limit for preventing the bearing from moving forwards. When the workpiece rotates, the ceramic wafer and the supporting piece rotate together, friction between the ceramic wafer and the bearing inner ring is reduced, and the surface of the workpiece inner ring is prevented from being scratched, so that the precision and the appearance quality of a product are improved.
Description
Technical Field
The utility model relates to a centering shaft belongs to bearing processing machinery technical field.
Background
Superfinishing is the finishing of a finished surface with a fine grit oilstone mounted on a vibrating head. The superfinishing is generally arranged after the finish grinding process, with a machining allowance of only a few microns, and is suitable for machining crankshafts, rollers, bearing rings and the like. The superfinishing machine is a precision machine for such processing, and presses an oilstone against a rotating workpiece at a relatively low pressure to form a surface contact state, and at the same time, the oilstone performs a relatively high frequency axial vibration to finely polish the surface of the workpiece. The superfinishing machine can greatly improve roughness in a short time, does not generate abnormal change on the surface structure of a workpiece due to processing under low pressure, can remove or mostly remove a surface deterioration layer generated in the grinding or cutting process, and can remove surface ripples which are easy to appear in grinding due to the fact that an oilstone is in surface contact with the workpiece and automatic profiling is performed, thereby improving roundness.
An important application field of the superfinishing machine is superfinishing of bearing inner rings. The common method is to sleeve the bearing inner ring on the centering shaft supporting device and then clamp the bearing inner ring on a machine tool for processing. Surface damage such as scratches cannot occur on the bearing inner ring in the machining process. At present, a centering shaft support device does not rotate along with a workpiece (as shown in fig. 1), so that mutual friction is generated between the centering shaft support device and the workpiece due to relative rotation, the centering shaft support device is abraded, the surface of an inner ring of the workpiece is damaged, and the product precision is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a centering shaft that is used for supporting the bearing inner circle during super finishing is provided to above-mentioned prior art, avoids rubbing each other between work piece inner circle and the centering shaft support piece, avoids work piece inner circle surface fish tail, improves the precision and the appearance quality of product.
The utility model provides a technical scheme that above-mentioned problem adopted does: the utility model provides a be used for supporting bearing inner race's centering shaft during super finishing, includes the centering shaft body, the front end of centering shaft body is for extending the axle, should extend epaxial cover and establish the bearing, support piece is established to bearing outer lane cover, and support piece makes the rotation action around extending the axle, threaded hole, roller shaft hole and centering shaft fixed thread hole are seted up to the centering shaft body.
The rear side of the inner ring of the supporting piece is provided with a shaft shoulder, the extension shaft is provided with a step, the step and the shaft shoulder respectively abut against the rear end of the bearing to form a limit for preventing the bearing from moving backwards, the end cover is fixedly arranged on the end face of the front side of the supporting piece, the end face of the front end of the extension shaft is fixedly provided with a gasket, and the gasket and the end cover respectively partially abut against the front end of the bearing to form a limit for preventing the bearing from moving forwards.
Specifically, the axial section of the end cover is L-shaped, the inner ring of the end cover is formed into a flanging, and the flanging is pressed against the bearing backwards. The front end of the extension shaft is flush with the front end of the bearing, and the gasket is simultaneously abutted against the extension shaft and the front end of the bearing.
The bearing is a deep groove ball bearing, and a plurality of bearings are arranged in parallel in the axial direction.
The support piece outer lane is equipped with the potsherd, and the potsherd has a plurality ofly, and the even interval of hoop sets up along support piece outer lane, and arbitrary potsherd axial runs through support piece (front and back).
Compared with the prior art, the utility model has the advantages of: the utility model discloses a centering shaft, when work piece (bearing inner circle) is rotatory, the potsherd is together rotatory thereupon with support piece, has reduced the friction between potsherd and the work piece inner circle, has avoided work piece inner circle surface fish tail to the precision and the appearance quality of product have been improved.
Drawings
FIG. 1 is a schematic view of a prior art centering shaft;
fig. 2 is a schematic view of a centering shaft according to an embodiment of the present invention;
fig. 3 is a three-dimensional view of a centering shaft according to an embodiment of the present invention;
in the figure, a centering shaft body 1, a deep groove ball bearing 2, a first screw 3, a gasket 4, an end cover 5, a second screw 6, a ceramic chip 7, a threaded hole 8, a roller shaft hole 9, a centering shaft fixing threaded hole 10 and a supporting piece 11 are arranged.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
As shown in fig. 1, the centering shaft for supporting the inner ring of the bearing in this embodiment includes a centering shaft body 1, an extension shaft is formed at the front end of the centering shaft body 1, the extension shaft is sleeved with a deep groove ball bearing 2, a support 11 is sleeved on the outer ring of the deep groove ball bearing 2, a step is provided on the extension shaft, a shoulder is provided on the rear side of the inner ring of the support 11, the shoulder and the step together form a limit for preventing the deep groove ball bearing 2 from moving backward, an end cover 5 is provided on the front end face of the support 11, the end cover 5 is fixed on the support 11 by a second screw 6, a gasket 4 is provided on the front end face of the extension shaft, the gasket 4 is fixedly connected with the extension shaft by a first screw 3, the gasket 4 and the end cover 5 respectively form a limit for preventing the deep groove ball bearing 2 from moving forward, so that the deep groove ball bearing 2 is fixed between the extension shaft and the support 11, the support, the centering shaft body 1 is provided with an M6 threaded hole 8, a roller shaft hole 9 and a centering shaft fixing threaded hole 10.
The deep groove ball bearings 2 on the centering shaft body 1 are axially arranged in parallel by 2.
The ceramic plate 7 is arranged on the outer ring of the supporting piece 11, and the ceramic plate 7 and the supporting piece 11 rotate around the centering shaft body 1.
When the roller path on the bearing inner ring is processed and then is subjected to lapping and grinding, the inner diameter of the bearing inner ring is sleeved on the ceramic plate 7, and when the bearing inner ring rotates, the ceramic plate 7 and the support piece 11 rotate together, so that the friction between the ceramic plate 7 and the bearing inner ring is reduced, the surface scratch of the bearing inner ring is avoided, and the precision and the appearance quality of a product are improved.
In addition to the above embodiments, the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.
Claims (6)
1. The utility model provides a be used for supporting centering shaft of bearing inner race when super finishing, includes centering shaft body (1), its characterized in that: the front end of the centering shaft body (1) is an extension shaft, a bearing is sleeved on the extension shaft, a support piece (11) is sleeved on the outer ring of the bearing, the support piece (11) rotates around the extension shaft, and the centering shaft body (1) is provided with a threaded hole (8), a roller shaft hole (9) and a centering shaft fixing threaded hole (10).
2. A centering shaft for supporting an inner race of a bearing at the time of superfinishing according to claim 1, wherein: the rear side of the inner ring of the support piece (11) is provided with a shaft shoulder, the extension shaft is provided with a step, the step and the shaft shoulder respectively abut against the rear end of the bearing to form a limit for preventing the bearing from moving backwards, the end cover (5) is fixedly arranged on the end face of the front side of the support piece (11), the end face of the front end of the extension shaft is fixedly provided with a gasket (4), and the gasket (4) and the end cover (5) respectively partially abut against the front end of the bearing to form a limit for preventing the bearing from moving forwards.
3. A centering shaft for supporting an inner race of a bearing at the time of superfinishing according to claim 1, wherein: the bearing is a deep groove ball bearing (2), and a plurality of bearings are arranged in parallel in the axial direction.
4. A centering shaft for supporting an inner race of a bearing at the time of superfinishing according to claim 1, wherein: the ceramic plate (7) is arranged on the outer ring of the supporting piece (11).
5. A centering shaft for supporting an inner race of a bearing at the time of superfinishing according to claim 2, wherein: the axial section of the end cover is L-shaped, the inner ring of the end cover is formed into a flanging, and the flanging is pressed against the bearing backwards.
6. A centering shaft for supporting an inner race of a bearing at the time of superfinishing according to claim 2, wherein: the front end of the extension shaft is flush with the front end of the bearing, and the gasket (4) is abutted against the front ends of the extension shaft and the bearing simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921718845.9U CN210938276U (en) | 2019-10-14 | 2019-10-14 | Centering shaft for supporting bearing inner ring during super-finishing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921718845.9U CN210938276U (en) | 2019-10-14 | 2019-10-14 | Centering shaft for supporting bearing inner ring during super-finishing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210938276U true CN210938276U (en) | 2020-07-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921718845.9U Active CN210938276U (en) | 2019-10-14 | 2019-10-14 | Centering shaft for supporting bearing inner ring during super-finishing |
Country Status (1)
| Country | Link |
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| CN (1) | CN210938276U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114986443A (en) * | 2022-05-09 | 2022-09-02 | 中国人民解放军第五七一九工厂 | Assembly protection structure of aero-engine support assembly, use method and preparation method |
| CN115302399A (en) * | 2022-08-30 | 2022-11-08 | 哈尔滨轴承集团有限公司 | Centering shaft for lapping inner raceway of bearing |
-
2019
- 2019-10-14 CN CN201921718845.9U patent/CN210938276U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114986443A (en) * | 2022-05-09 | 2022-09-02 | 中国人民解放军第五七一九工厂 | Assembly protection structure of aero-engine support assembly, use method and preparation method |
| CN115302399A (en) * | 2022-08-30 | 2022-11-08 | 哈尔滨轴承集团有限公司 | Centering shaft for lapping inner raceway of bearing |
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