CN213393137U - Deep groove ball bearing with concentric outer spacer sleeve - Google Patents
Deep groove ball bearing with concentric outer spacer sleeve Download PDFInfo
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- CN213393137U CN213393137U CN202022063974.8U CN202022063974U CN213393137U CN 213393137 U CN213393137 U CN 213393137U CN 202022063974 U CN202022063974 U CN 202022063974U CN 213393137 U CN213393137 U CN 213393137U
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Abstract
The invention discloses a deep groove ball bearing with an outer spacer sleeve concentric, and belongs to the technical field of bearings. It includes: a mandrel; the inner diameter of the tight-fitting bearing is in interference fit with the outer diameter of the mandrel, and the end face of the inner ring of the tight-fitting bearing is connected with an inner bushing; the inner diameter of the sliding fit bearing is connected with the mandrel in a sliding fit manner, and an outer spacer bush is arranged between the outer ring end face of the sliding fit bearing and the outer ring end face of the tight fit bearing; the annular groove is formed in the outer spacer sleeve, a nylon ring is arranged in the annular groove, the outer diameter of the nylon ring is in interference fit with the annular groove, and the inner diameter of the nylon ring is in clearance fit with the inner bushing. The utility model discloses install the nylon ring in the inside ring groove of outer spacer, the external diameter and the ring groove interference fit of this nylon ring of installation back, the width of nylon ring is less than the width of outer spacer, the internal diameter of nylon ring slightly be greater than the external diameter of neck bush and with clearance fit to this clearance between having reduced outer spacer and the neck bush, ensure that outer spacer is concentric when the high-speed operation of bearing, reduce centrifugal force, ensure that the bearing operates steadily.
Description
Technical Field
The utility model belongs to the technical field of the bearing, concretely relates to concentric deep groove ball bearing of outer spacer.
Background
In order to eliminate the axial clearance of the bearing, improve the rigidity and the rotation precision of the bearing, and reduce the axial movement, the steel ball slippage and the noise in the bearing operation, the bearing is properly pre-tightened in the axial direction.
In the prior art, axial pretensioning of deep groove ball bearings is generally performed by two methods: 1. the constant-pressure pre-tightening is to pre-tighten the bearings at two sides by transmitting axial pre-tightening force between the outer rings of the two bearings through a compression spring or a waveform spring piece, but the method for pre-tightening the bearings by using the compression spring or the waveform spring piece has the problems of non-uniform stress in the bearing operation, inclination, shaking, sliding and the like of the outer rings of the bearings easily occur due to low manufacturing precision of the spring and components in the pre-tightening method, so that the bearings are difficult to stably operate, and the problem of bearing noise is difficult to solve; 2. the bearing is pre-tightened by positioning and pre-tightening, the pre-tightening of the bearing is realized through the pre-tightening amount, the pre-tightening spacer sleeve needs to be polished and adjusted, or the position is fixed by threads, so that time is consumed, and a master with certain experience is needed to complete the pre-tightening. The two methods also have the common disadvantage of requiring a large space and being difficult to apply to the ultra-miniature deep groove ball bearing.
In addition, after the deep groove ball bearing is axially pre-tightened, the outer spacer bush cannot keep concentric operation with the bearing due to the action of centrifugal force during operation of the bearing, and the problem that the bearing is unstable in operation exists.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an to prior art in the application of special miniature deep groove ball bearing above-mentioned problem, provided a bearing carrier and changeed endocentric deep groove ball bearing of steady outer spacer.
The utility model discloses the accessible is realized by following technical scheme:
a deep groove ball bearing with concentric outer cups, comprising:
a mandrel;
the inner diameter of the tight-fitting bearing is in interference fit with the outer diameter of the mandrel, and the end face of the inner ring of the tight-fitting bearing is connected with an inner bushing;
the inner diameter of the sliding fit bearing is connected with the mandrel in a sliding fit manner, and an outer spacer bush is arranged between the outer ring end face of the sliding fit bearing and the outer ring end face of the tight fit bearing;
the nylon ring is arranged in the annular groove, the outer diameter of the nylon ring is in interference fit with the annular groove, and the inner diameter of the nylon ring is in clearance fit with the outer diameter of the inner bushing.
As a further improvement of the utility model, the width of the nylon ring is smaller than the width of the circular groove, and the inner diameter of the nylon ring is larger than the outer diameter of the inner bushing.
As a further improvement, the utility model discloses a still include the ring of pretightning, its with dabber external diameter clearance fit, the ring of pretightning is located the outside of sliding fit bearing, the ring of pretightning under the effect of axial pretension, to the inner circle transmission axial precompression of sliding fit bearing.
As a further improvement, the inner diameter of the neck bush with the external diameter interference fit of dabber, just the both ends of neck bush respectively with the inner circle terminal surface of tight fit bearing with the inner circle terminal surface of sliding fit bearing contacts.
As a further improvement, the close-fitting bearing and the bearing inner race and the bearing outer race of the sliding fit bearing are respectively provided with a bearing channel.
As a further improvement of the utility model, the steel ball has been distributed in the bearing channel, just the steel ball passes through the cage and is the interval equipartition in the bearing channel and arranges.
As a further improvement, the close-fitting bearing with the bearing channel both sides of sliding fit bearing inner race are equipped with seal groove, dust-proof groove respectively, the seal groove with the structure size in dust-proof groove is the same.
As a further improvement, the dustproof groove is equipped with space ring, shield, tight circle outside by interior in proper order, the space ring inboard with the dustproof groove terminal surface is hugged closely, the space ring outside with the external diameter internal plane of shield is hugged closely, just the external plane quilt of shield the tight circle compresses tightly.
As a further improvement, the sealing groove is internally provided with a rubber sealing ring which is embedded with a metal framework.
As a further improvement of the utility model, a plurality of annular glue grooves are arranged on the outer surface of the mandrel at intervals.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model discloses install the nylon ring in the inside ring groove of outer spacer, the external diameter and the ring groove interference fit of this nylon ring of installation back, the width of nylon ring is less than the width of outer spacer, the internal diameter of nylon ring slightly is greater than the external diameter of neck bush and with clearance fit between to this clearance between reduced outer spacer and the neck bush, reduce the eccentric amount of outer spacer, ensure that outer spacer is concentric when the high-speed operation of bearing, reduce centrifugal force, ensure that the bearing operates steadily.
2. The tight-fitting bearing of the utility model is fixedly arranged on the outer diameter of the mandrel, the other set of sliding-fit bearing, is connected with the outer diameter of the mandrel in a sliding fit way, the two outer rings of the bearings are positioned by contacting through an outer spacer sleeve, before axial pre-tightening, glue is coated on a mandrel area for installing a slide-fit bearing, then the slide-fit bearing is installed, a pre-tightening ring is installed to be contacted with the end face of an inner ring of the slide-fit bearing, the pre-tightening ring is pressed inwards by setting axial pre-tightening force from the outside, the pre-tightening ring transmits the axial pre-tightening force to the inner ring of the sliding fit bearing, and then the axial pre-tightening force is transmitted to the steel ball of the sliding fit bearing, the outer ring of the sliding fit bearing, the outer spacer bush, the outer ring of the close fit bearing, the steel ball of the close fit bearing and the inner ring of the close fit bearing in sequence to implement axial pre-tightening, the axial pre-tightening force is kept for a certain time, after the, the axial pressure at the position can be kept, so that the bearing is always in a pre-tightening state, and finally, the external axial pre-tightening force is removed. The utility model discloses both reached the level pressure pretension, compromise the location pretension again, and simplified the structure, practiced thrift the space, be applicable to the axial pretension of special miniature deep ditch ball bearing, be a new solution.
Drawings
Fig. 1 is a cross-sectional view of a first embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of the embodiment A of FIG. 1;
fig. 3 is an exploded view of the embodiment of fig. 1.
In the figure, 100, a mandrel; 101. an annular glue tank; 110. tightly fitting a bearing; 120. an inner liner; 130. a sliding bearing; 140. an outer spacer sleeve; 150. a circular groove; 151. a nylon ring; 160. pre-tightening a ring; 170. a bearing channel; 171. a steel ball; 172. a holder; 180. a dust-proof groove; 181. a space ring; 182. a dust cover; 183. tightening a ring; 190. a sealing groove; 191. a rubber seal ring; 192. a metal skeleton.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical method of the present invention, but the present invention is not limited to these embodiments.
As shown in fig. 1-3, the utility model provides a concentric deep groove ball bearing of outer spacer, include: the bearing comprises a mandrel 100, a tight-fitting bearing 110, a sliding-fit bearing 130, an outer spacer 140, an inner bushing 120, a circular groove 150 and a nylon ring 151.
The mandrel 100 is arranged in a step shape, one end with a small diameter is an optical axis, one end with a large diameter (hereinafter referred to as an outer diameter) is used for mounting a bearing, and a plurality of annular glue grooves 101 are arranged on the outer surface of the mandrel at intervals.
The tight-fitting bearing 110 is a standard deep groove ball bearing, the inner diameter of the tight-fitting bearing 110 is in interference fit with the outer diameter of the mandrel 100, the inner ring end face of the tight-fitting bearing 110 is connected with an inner bushing 120, and the tight-fitting bearing 110 can be axially positioned through the arrangement of the inner bushing 120.
The sliding fit bearing 130 is a deep groove ball bearing with a non-standard inner diameter, the outer shape dimension of the sliding fit bearing 130 is the same as that of the tight fit bearing 110 except that the inner diameter is non-standard, the inner structure of the sliding fit bearing 130 is also the same as that of the tight fit bearing 110, the sliding fit bearing 130 is slidably mounted on the mandrel 100, an outer spacer 140 is arranged between the outer ring end surface of the sliding fit bearing 130 and the outer ring end surface of the tight fit bearing 110, and the outer spacer 140 is used for contact positioning, namely the axial position can be determined after the outer ring end surface of the sliding fit bearing 130 is contacted with the outer ring end surface of the tight fit bearing 110 through the outer spacer 140.
The annular groove 150 is formed in the outer spacer 140, the nylon ring 151 is installed in the annular groove 150, the outer diameter of the nylon ring 151 is in interference fit with the annular groove 150, the inner diameter of the nylon ring 151 is in clearance fit with the inner bushing 120, the width of the nylon ring 151 is smaller than that of the annular groove 150, and the inner diameter of the nylon ring 151 is slightly larger than that of the inner bushing 120, so that the clearance between the outer spacer 140 and the inner bushing 120 can be reduced, the outer spacer 140 is guaranteed to be concentric when the bearing runs at a high speed, the centrifugal force is reduced, and the bearing runs stably.
Preferably, the pre-tightening ring 160 is further included, and is in clearance fit with the outer diameter of the mandrel 100, the pre-tightening ring 160 is located on the outer side of the sliding fit bearing 130, and the pre-tightening ring 160 transmits the axial pre-tightening force to the inner ring of the sliding fit bearing 130 under the action of the axial pre-tightening force.
Specifically, before axial pre-tightening, glue is coated on the area of a mandrel 100 for installing the sliding fit bearing 130, namely the annular glue groove 101 for installing the sliding fit bearing 130, then the sliding fit bearing 130 is installed, then the pre-tightening ring 160 is installed to be contacted with the end face of the inner ring of the sliding fit bearing 130, the pre-tightening ring 160 is pressed inwards through the externally set axial pre-tightening force, the pre-tightening ring 160 can transmit the axial pre-tightening force to the inner ring of the sliding fit bearing 130, and further sequentially transmit the axial pre-tightening force to the steel ball 171 of the sliding fit bearing 130, the outer ring of the sliding fit bearing 130, the outer spacer 140, the outer ring of the tight fit bearing 110, the steel ball 171 of the tight fit bearing 110 and the inner ring of the tight fit bearing 110, so as to complete axial pre-tightening, at this time, after the axial pre-tightening force is maintained for a certain time, after the glue is solidified, the axial pressure transmitted by the pre-tightening ring 160 can be, the bearing after axial pretension operates stably, the problems of inclination, shaking, sliding and the like of the outer ring of the bearing can not occur, and the problem of noise is solved. To sum up, the utility model discloses both adopted the method of level pressure pretension, compromise the method of location pretension again to simplified the structure, practiced thrift the space, be applicable to the axial pretension of special miniature deep furrow ball bearing.
In addition, in the embodiment, the installation positions of the tight-fitting bearing 110, the inner bushing 120, the sliding-fit bearing 130 and the pre-tightening ring 160 are respectively in one-to-one correspondence with the annular glue grooves 101 formed in the mandrel 100, glue is pre-coated in the grooves, so that the installed tight-fitting bearing 110, the inner bushing 120, the sliding-fit bearing 130 and the pre-tightening ring 160 are firmly installed, and the bearings are pre-tightened through the glue.
Preferably, the inner diameter of the inner bushing 120 is in interference fit with the outer diameter of the mandrel 100, and both ends of the inner bushing 120 are respectively in contact with the inner ring end surface of the tight-fit bearing 110 and the inner ring end surface of the slide-fit bearing 130.
Preferably, the bearing inner ring and the bearing outer ring of the tight-fit bearing 110 and the sliding-fit bearing 130 are respectively provided with a bearing channel 170, steel balls 171 are distributed in the bearing channel 170 through a retainer 172, and the steel balls 171 are equally distributed at intervals through ball pockets of the retainer 172. In addition, because there is the clearance between the inside and outside lane of steel ball 171 and bearing, before the bearing operates, must eliminate this bearing clearance at first to prevent that the bearing from appearing shake, slip scheduling problem in operation process, also can avoid the noise simultaneously, and the utility model discloses a set up above-mentioned pretension circle 160 and carry out the axial pretension, be exactly in order to eliminate steel ball 171 and the bearing, the clearance between the outside lane to rethread glue is fixed after accomplishing the axial pretension, and overall structure is simplified, has practiced thrift the space, and has guaranteed that the bearing operates steadily.
Preferably, a sealing groove 190 and a dust-proof groove 180 are respectively arranged on two sides of the bearing channel 170 of the outer rings of the close-fitting bearing 110 and the sliding-fitting bearing 130, and the structural dimensions of the sealing groove 190 and the dust-proof groove 180 are the same.
The dust-proof groove 180 is internally and externally provided with a spacing ring 181, a dust cover 182 and a fastening ring 183 in sequence, the inner side of the spacing ring 181 is tightly attached to the end surface of the dust-proof groove 180, the outer side of the spacing ring 181 is tightly attached to the outer diameter inner plane of the dust cover 182, and the outer plane of the dust cover 182 is tightly pressed by the fastening ring 183, so that the dust cover 182 and the spacing ring 181 can be firmly installed in the dust-proof groove 180, impurities such as dust and the like are prevented from entering the bearing, the abrasion of the bearing is reduced, and the service life is prolonged.
And still be equipped with rubber seal 191 in the seal groove 190, rubber seal 191 is embedded to have metal framework 192, and this metal framework 192 plays the supporting role to rubber seal 191 to make rubber seal 191's sealed effect better, rubber seal 191's internal diameter and bearing inner race external diameter non-contact, through this rubber seal 191's setting, not only prevented in outside dust from entering into the bearing, still prevented the inside grease of bearing to reveal.
The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the technical means, but also comprises the technical scheme formed by the arbitrary combination of the technical characteristics. The above is a detailed implementation manner of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.
Claims (10)
1. A deep groove ball bearing with concentric outer spacers is characterized by comprising:
a mandrel;
the inner diameter of the tight-fitting bearing is in interference fit with the outer diameter of the mandrel, and the end face of the inner ring of the tight-fitting bearing is connected with an inner bushing;
the inner diameter of the sliding fit bearing is connected with the mandrel in a sliding fit manner, and an outer spacer bush is arranged between the outer ring end face of the sliding fit bearing and the outer ring end face of the tight fit bearing;
the nylon ring is arranged in the annular groove, the outer diameter of the nylon ring is in interference fit with the annular groove, and the inner diameter of the nylon ring is in clearance fit with the outer diameter of the inner bushing.
2. The deep groove ball bearing concentric with an outer spacer as claimed in claim 1, wherein the width of the nylon ring is smaller than the width of the circular groove, and the inner diameter of the nylon ring is larger than the outer diameter of the inner liner.
3. The deep groove ball bearing with the concentric outer spacer sleeve as claimed in claim 1, further comprising a pre-tightening ring in clearance fit with the outer diameter of the mandrel, wherein the pre-tightening ring is located outside the sliding fit bearing, and the pre-tightening ring transmits axial pre-pressure to the inner ring of the sliding fit bearing under the action of axial pre-tightening force.
4. The deep groove ball bearing with the concentric outer spacer as claimed in claim 1, wherein the inner diameter of the inner bushing is in interference fit with the outer diameter of the mandrel, and both ends of the inner bushing are respectively in contact with the inner ring end face of the close-fitting bearing and the inner ring end face of the sliding-fitting bearing.
5. The deep groove ball bearing with the concentric outer spacer of claim 1, wherein the inner ring and the outer ring of the close-fitting bearing and the sliding-fit bearing are respectively provided with a bearing channel.
6. The deep groove ball bearing with the concentric outer spacer of claim 5, wherein steel balls are distributed in the bearing channel and are equally spaced in the bearing channel by a retainer.
7. The deep groove ball bearing with the concentric outer spacer sleeve as claimed in claim 5, wherein two sides of the bearing channel of the outer ring of the close-fitting bearing and the sliding-fit bearing are respectively provided with a sealing groove and a dust-proof groove, and the sealing groove and the dust-proof groove have the same structural dimension.
8. The deep groove ball bearing with the concentric outer spacer of claim 7, wherein a spacer ring, a dust cap and a clamping ring are sequentially arranged in the dust-proof groove from inside to outside, the inner side of the spacer ring is tightly attached to the end face of the dust-proof groove, the outer side of the spacer ring is tightly attached to the outer diameter inner plane of the dust cap, and the outer plane of the dust cap is tightly pressed by the clamping ring.
9. The deep groove ball bearing with the concentric outer spacer of claim 7, wherein a rubber sealing ring is further arranged in the sealing groove, and a metal skeleton is embedded in the rubber sealing ring.
10. The deep groove ball bearing with the concentric outer spacer of claim 1, wherein a plurality of annular glue grooves are spaced on the outer surface of the mandrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022063974.8U CN213393137U (en) | 2020-09-18 | 2020-09-18 | Deep groove ball bearing with concentric outer spacer sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022063974.8U CN213393137U (en) | 2020-09-18 | 2020-09-18 | Deep groove ball bearing with concentric outer spacer sleeve |
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| Publication Number | Publication Date |
|---|---|
| CN213393137U true CN213393137U (en) | 2021-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022063974.8U Active CN213393137U (en) | 2020-09-18 | 2020-09-18 | Deep groove ball bearing with concentric outer spacer sleeve |
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| CN (1) | CN213393137U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116538149A (en) * | 2023-06-19 | 2023-08-04 | 湖南南光精密机械有限公司 | Bearing pre-tightening assembly structure, fan and bearing pre-tightening assembly method |
-
2020
- 2020-09-18 CN CN202022063974.8U patent/CN213393137U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116538149A (en) * | 2023-06-19 | 2023-08-04 | 湖南南光精密机械有限公司 | Bearing pre-tightening assembly structure, fan and bearing pre-tightening assembly method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A concentric deep groove ball bearing with outer spacer Effective date of registration: 20211009 Granted publication date: 20210608 Pledgee: China Construction Bank Corporation Ningbo Zhenhai sub branch Pledgor: NINGBO ZHENHAI SILVER-BALL BEARING Co.,Ltd. Registration number: Y2021330001860 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20220304 Granted publication date: 20210608 Pledgee: China Construction Bank Corporation Ningbo Zhenhai sub branch Pledgor: NINGBO ZHENHAI SILVER-BALL BEARING Co.,Ltd. Registration number: Y2021330001860 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| CP03 | Change of name, title or address |
Address after: No. 1288, Zhenluo East Road, Zhenhai District, Ningbo City, Zhejiang Province Patentee after: Ningbo Yinqiu Technology Co.,Ltd. Address before: No. 1288, Zhenluo East Road, Zhenhai District, Ningbo City, Zhejiang Province, 315200 Patentee before: NINGBO ZHENHAI SILVER-BALL BEARING Co.,Ltd. |
|
| CP03 | Change of name, title or address |