CN219994187U - Rolling bearing - Google Patents
Rolling bearing Download PDFInfo
- Publication number
- CN219994187U CN219994187U CN202321733353.3U CN202321733353U CN219994187U CN 219994187 U CN219994187 U CN 219994187U CN 202321733353 U CN202321733353 U CN 202321733353U CN 219994187 U CN219994187 U CN 219994187U
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- CN
- China
- Prior art keywords
- rolling bearing
- inner ring
- lip
- outer ring
- groove
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- 238000005096 rolling process Methods 0.000 title claims abstract description 48
- 238000007789 sealing Methods 0.000 claims abstract description 38
- 239000004519 grease Substances 0.000 abstract description 13
- 230000000694 effects Effects 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The utility model provides a rolling bearing, which comprises an outer ring, an inner ring, a retainer, a sealing component and a plurality of rolling bodies, wherein an outer ring raceway groove is arranged on the inner diameter surface of the outer ring, an inner ring raceway groove corresponding to the outer ring raceway groove along the radial direction is arranged on the outer diameter surface of the inner ring, the rolling bearing is characterized in that outer ring annular grooves are arranged on two sides of the outer ring raceway groove, inner ring annular grooves are arranged on two sides of the inner ring raceway groove, one end of the sealing component is embedded into the outer ring annular grooves, the other end of the sealing component is adjacent to the inner ring annular grooves and comprises a lip extending towards the inner ring annular grooves, and at least one part of the lip is in the inner ring annular grooves and is in non-contact with the inner ring annular grooves. Because the interference in the annular groove of the inner ring is not required to be considered, the running is not smooth. Further, since grease is generally collected in the inner annular groove by centrifugal force, there is no problem that sealing performance is poor due to a non-contact region.
Description
Technical Field
The present utility model relates to a rolling bearing for a servo motor.
Background
Bearing grease has great influence on the encoder of the servo motor, if grease leakage occurs, the rotating speed of the servo motor cannot be detected, even personnel injury is caused, the grease leakage is prevented for the bearing, in order to meet the requirements, the bearing with better sealing performance is generally selected to correspond, but the bearing with good sealing performance generally has larger running torque and wastes energy.
Existing bearing seals include a bearing and a seal member. The bearing comprises an outer ring, an inner ring and a plurality of balls, wherein the inner diameter surface of the outer ring and the outer diameter surface of the inner ring are respectively provided with a rollaway nest, the balls are arranged between the two rollaway nest, and sealing grooves are respectively arranged on two sides of the rollaway nest of the inner diameter surface of the outer ring. The seal member is a contact seal member, which is typically in the shape of an annular plate. The external diameter part of the sealing part is embedded in the sealing groove, and the internal diameter part of the sealing part is in interference fit with the external diameter surface of the bearing inner ring to form elastic contact, so that the bearing is sealed.
For example, chinese patent (publication No. CN204458848U, hereinafter referred to as document 1) discloses a rolling bearing. The rolling bearing comprises an outer ring, an inner ring, a plurality of rolling bodies and a sealing component, wherein an outer ring raceway groove is arranged on the inner diameter surface of the outer ring, an inner ring raceway groove corresponding to the outer ring raceway groove in the radial direction is arranged on the outer diameter surface of the inner ring, a pair of annular grooves are arranged on two sides of the outer ring raceway groove and the inner ring raceway groove, the outer diameter part of the sealing component is embedded in the annular grooves, an inward contact type sealing inner lip is arranged on the inner diameter part of the sealing component, the contact type sealing inner lip is contacted with the annular grooves to form an annular groove sealing surface, and the included angle between the annular groove sealing surface and the width surface of the inner ring is 3-5 degrees. Can reliably prevent the entry of mud water and improve the sealing performance.
However, according to the technical solution of document 1, the above-mentioned existing sealed rolling bearing in which the inside of the bearing is sealed with a sealing member has the following drawbacks: the insufficient interference of the inward sealing lip of the sealing part causes poor sealing, but if the interference of the inward sealing lip is too large, the bearing runs unevenly.
Disclosure of Invention
The utility model aims to overcome the defects of unsmooth running or poor sealing performance of the rolling bearing in the prior art caused by difficult accurate setting of the interference between a sealing lip and a sealing groove, and provides the rolling bearing with good sealing performance and small influence on running.
The utility model solves the technical problems by the following technical scheme:
the rolling bearing comprises an outer ring, an inner ring, a retainer, a sealing component and a plurality of rolling bodies, wherein an outer ring raceway groove is arranged on the inner diameter surface of the outer ring, an inner ring raceway groove corresponding to the outer ring raceway groove in the radial direction is arranged on the outer diameter surface of the inner ring, the rolling bearing is characterized in that outer ring annular grooves are arranged on two sides of the outer ring raceway groove, inner ring annular grooves are arranged on two sides of the inner ring raceway groove, one end of the sealing component is embedded into the outer ring annular grooves, the other end of the sealing component is adjacent to the inner ring annular grooves, a lip extending towards the direction of the inner ring annular grooves is arranged on at least one part of the lip in the inner ring annular grooves and is in non-contact with the inner ring annular grooves. By fitting the seal member in the outer annular groove while at least a part of the lip portion in the inner annular groove is in a non-contact state, the problem of interference in the inner annular groove does not need to be considered, and thus, the running is not made unsmooth. Further, since grease is generally collected in the inner annular groove by centrifugal force, there is no problem that sealing performance is poor due to a non-contact region.
Preferably, the lip portion includes a main lip and an auxiliary lip, the main lip further extends in the direction of the rolling element, the front end portion of the main lip is not in contact with the inner ring-shaped groove, and the auxiliary lip extends in the bottom direction of the inner ring-shaped groove. That is, the main lip is close to but not contacted with the annular groove of the inner ring, the grease can be prevented from being accumulated and overflowed under the action of centrifugal force by utilizing the tension of the grease, and the oil return effect is better under the cooperation of the auxiliary lip.
Preferably, the seal member is attached to a seal core plate, the end of the seal core plate adjacent the inner annular groove being submerged into the seal member. By arranging the seal core plate in the seal part, the integral mechanical strength of the seal part can be improved, and the service life is longer. On the other hand, the end portions of the seal core plate are immersed in the seal member, so that the support of both ends of the seal member can be enhanced.
Preferably, the end portion is formed with an inward bent shape. Accordingly, the shape of the sealing member protruding inward at both ends can be supported better.
Preferably, the highest point of the inner annular groove near the inner side wall of the rolling element is higher than the highest point of the outer side wall of the other side, and a smooth surface facing the inner side wall is formed between the main lip and the auxiliary lip. Accordingly, the smooth surface can be pressed by vibration or the like more effectively, and leakage of grease can be further prevented.
In summary, according to the rolling bearing of the present utility model, at least a part of the lip portion in the inner ring annular groove is in a non-contact state, and the problem of interference in the inner ring annular groove is not considered, so that the rolling bearing does not cause unsmooth operation. Further, since grease is generally collected in the inner annular groove by centrifugal force, there is no problem that sealing performance is poor due to a non-contact region. The utility model also provides a plurality of additional technical features, and the technical features are described in the above paragraphs.
Drawings
Fig. 1 is a schematic view showing a structure of a single side of a rolling bearing according to an embodiment of the present utility model.
Fig. 2 is a schematic structural view of a lip according to an embodiment of the present utility model.
Detailed Description
The utility model will now be more fully described by way of example only, with reference to the accompanying drawings.
Fig. 1 is a schematic view of a single side structure of a rolling bearing according to an embodiment of the present utility model, and fig. 2 is a schematic view of a lip according to an embodiment of the present utility model. As shown in fig. 1 and 2, the rolling bearing according to the present embodiment includes an outer ring 2, an inner ring 1, a retainer 4, a seal member 5, and a plurality of rolling elements 3, wherein an outer ring raceway groove 7 is provided on an inner diameter surface of the outer ring 2, an inner ring raceway groove 6 corresponding to the outer ring raceway groove 7 in a radial direction is provided on an outer diameter surface of the inner ring 1, outer ring annular grooves 21 are provided on both sides of the outer ring raceway groove 7, inner ring annular grooves 11 are provided on both sides of the inner ring raceway groove 6, one end of the seal member 5 is fitted into the outer ring annular grooves 21, the other end of the seal member 5 is adjacent to the inner ring annular grooves 11, and includes a lip portion 51 extending in a direction of the inner ring annular grooves 11, and at least a part of the lip portion 51 is in the inner ring annular grooves 11 and is in non-contact with the inner ring annular grooves 11. By fitting the seal member 5 in the outer ring annular groove 21 while at least a part of the lip portion 51 in the inner ring annular groove 11 is in a non-contact state, since there is no need to consider the problem of interference in the inner ring annular groove 11, no unsmooth operation is caused. Further, since grease is generally collected in the inner annular groove 11 by centrifugal force, there is no problem that sealing performance is poor due to a non-contact region.
Specifically, the lip 51 includes a main lip 10 extending further in the direction of the rolling elements 3, and a front end portion of the main lip is not in contact with the inner annular groove 11, and the sub lip 9 extends in the bottom direction of the inner annular groove 11. That is, the main lip approaches but does not contact the inner annular groove 11, so that the grease can be prevented from being accumulated and overflowed under the action of centrifugal force by utilizing the tension of the grease, and the oil return effect is better under the cooperation of the auxiliary lip 9.
Next, the seal member 5 is attached to a seal core plate 8, and the end of the seal core plate 8 near the inner ring annular groove 11 is immersed in the seal member 5. By providing the seal core plate 8 in the seal member 5, the mechanical strength of the seal member 5 as a whole can be improved and the service life can be prolonged. On the other hand, the end portions of the seal core plate 8 are immersed in the seal member 5, so that the support of both ends of the seal member 5 can be enhanced.
Further, the end portion of the seal core plate 8 is formed with an inward bent shape. Hereby, the shape of the sealing member 5 protruding inward at both ends can be made to have a better support.
Preferably, the inner annular groove 11 is located closer to the highest point of the inner wall of the rolling element than the highest point of the outer wall of the other side, and a smooth surface facing the inner wall is formed between the main lip 10 and the sub lip 9. Accordingly, the smooth surface can be pressed by vibration or the like more effectively, and leakage of grease can be further prevented.
In order to test the effect of this embodiment, an old component (i.e., a prior art component in which both the inner ring annular groove and the outer ring annular groove are interference-fitted by the seal member) and a new component (i.e., the rolling bearing of this embodiment) were selected, and evaluation tests were performed on 8 rolling bearings (16 in total) in each of the two types, to obtain the results of table 1, respectively.
Oil leakage test as shown in table 1 below, the test bearings were run at 6000rpm and at 120 ℃ for 24 hours, and after running, the bearing surfaces were visually checked for oil leakage.
Table 1 fat leakage test table
According to the oil leakage experimental result, 8 new parts have no oil leakage phenomenon, and 3 old parts have oil leakage phenomenon, which means that the oil leakage performance of the new parts is better than that of the old parts.
In the embodiment, the rolling bearing is shown with a single row of rolling elements, but the rolling bearing is not limited to this type of bearing, and may be, for example, a sealed rolling bearing with double rows of rolling elements.
The foregoing is merely illustrative of the present utility model and is not intended to limit the scope of the utility model, i.e. all equivalent changes and modifications that may be made in accordance with the scope of the utility model as defined in the appended claims should fall within the scope of the utility model.
Claims (5)
1. The rolling bearing comprises an outer ring, an inner ring, a retainer, a sealing part and a plurality of rolling bodies, wherein the inner diameter surface of the outer ring is provided with an outer ring raceway groove, the outer diameter surface of the inner ring is provided with an inner ring raceway groove corresponding to the outer ring raceway groove along the radial direction,
outer ring annular grooves are arranged on two sides of the outer ring raceway grooves,
an inner ring-shaped groove is arranged on two sides of the inner ring raceway groove,
one end of the sealing component is embedded into the outer ring groove,
the other end of the sealing member is adjacent to the inner annular groove and includes a lip portion extending in the direction of the inner annular groove,
at least a portion of the lip is within the inner annular groove and is not in contact with the inner annular groove.
2. A rolling bearing according to claim 1, wherein the rolling bearing is a rolling bearing,
the lip part comprises a main lip and an auxiliary lip, the main lip further extends towards the direction of the rolling body, the front end part of the main lip is not contacted with the annular groove of the inner ring,
the auxiliary lip extends toward the bottom of the inner ring annular groove.
3. A rolling bearing according to claim 2, wherein the rolling bearing is a rolling bearing,
the seal member is attached to a seal core plate,
the end of the seal core plate, which is close to the inner ring annular groove, is immersed into the seal component.
4. A rolling bearing according to claim 3, wherein the rolling bearing is a rolling bearing,
the end portion is formed with an inward bent shape.
5. The rolling bearing of claim 4 wherein the rolling bearing is a rolling bearing,
the highest point of the inner side wall of the inner ring-shaped groove close to the rolling body is higher than the highest point of the outer side wall of the other side,
a smooth surface is formed between the main lip and the auxiliary lip, the smooth surface facing the inner side wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321733353.3U CN219994187U (en) | 2023-07-04 | 2023-07-04 | Rolling bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321733353.3U CN219994187U (en) | 2023-07-04 | 2023-07-04 | Rolling bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219994187U true CN219994187U (en) | 2023-11-10 |
Family
ID=88615646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321733353.3U Active CN219994187U (en) | 2023-07-04 | 2023-07-04 | Rolling bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219994187U (en) |
-
2023
- 2023-07-04 CN CN202321733353.3U patent/CN219994187U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |