CN114776714A - Contact bearing seal structure - Google Patents
Contact bearing seal structure Download PDFInfo
- Publication number
- CN114776714A CN114776714A CN202210458903.9A CN202210458903A CN114776714A CN 114776714 A CN114776714 A CN 114776714A CN 202210458903 A CN202210458903 A CN 202210458903A CN 114776714 A CN114776714 A CN 114776714A
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- Prior art keywords
- sealing
- bearing
- contact
- bearing inner
- ring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
- F16C33/7806—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for spherical roller bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
- F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
- F16C33/7823—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region of sealing lips
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
- F16C33/783—Details of the sealing or parts thereof, e.g. geometry, material of the mounting region
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
- F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
- F16C33/7853—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner race
- F16C33/7856—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner race with a single sealing lip
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
- F16J15/3252—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Of Bearings (AREA)
Abstract
The utility model provides a contact bearing seal structure, includes bearing inner race, bearing inner race and two sealing washers, the sealing washer comprises steel skeleton and elastic sealing element, elastic sealing element is provided with sealed arch at its external diameter end, be provided with the seal lip at its internal diameter end, the seal lip is sheet structure, the arc wall has been seted up on the outer peripheral surface of bearing inner race, a side boundary setting of this arc wall is on an axial terminal surface of bearing inner race, the seal lip assembly is in the arc wall, and be the interference fit state with the arc wall contact, in order to realize that the holding chamber is sealed in the circumference girdle face contact of bearing inner race side, the seal lip still seted up the relief groove in its axial one side that deviates from the holding chamber. When the bearing sealing structure is used in a wide temperature range, the circumferential surface can still be ensured to be in contact with the annular belt type seal better, so that the sealing performance of the bearing is enhanced, and the service life and the reliability of the bearing are further improved.
Description
Technical Field
The invention relates to the technical field of bearings, in particular to a contact type bearing sealing structure.
Background
The bearing employs a contact type sealing structure, which should have a function of preventing leakage of an internal lubricant and intrusion of external dust, moisture and foreign substances. The sealing structure adopted by the bearing in the prior industry cannot be well adapted to a wide-temperature environment, and the sealing performance is poor and grease leakage occurs due to the fact that a sealing ring is separated from a contact part or the contact surface is small and basically adopts a circumferential line contact sealing mode under a low-temperature environment; under the high-temperature environment, the contact sealing area between the bearing and the bearing is too large, the deformation is large, the contact force is also large, and larger friction is generated, so that the service life and the reliability of the bearing are influenced. For example, chinese patent application with application publication No. CN111022487A discloses a sealed bearing, wherein sealing rings are disposed on the left and right sides of a retainer, the radially outer ends of the sealing rings are clamped with an outer ring, the radially inner ends of the sealing rings are in interference fit with an inner ring groove of the bearing, and the sealing rings are in interference fit with the inner ring of the bearing to prevent lubricant leakage and perform a sealing function. If the initial interference is large, the contact sealing area between the bearing and the bearing is increased under a high-temperature environment, and large friction is generated, so that the service life and the reliability of the bearing are influenced; if the initial interference is small, the contact sealing area between the two parts is small and even a gap is formed in a low-temperature environment, so that lubricating grease is leaked. Therefore, how to improve the above phenomena is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The technical purpose of the invention is as follows: the high-low temperature working environment is high in adaptability, and when the high-low temperature sealing ring is used in a wide temperature range, better circumferential surface contact annular belt type sealing can be still guaranteed, so that the sealing performance of the bearing is enhanced, and the service life and the reliability of the bearing are further improved.
In order to solve the technical problems, the invention adopts the technical scheme that: a contact type bearing sealing structure comprises a bearing outer ring, a bearing inner ring and two sealing rings, wherein the two sealing rings are arranged between the bearing outer ring and the bearing inner ring in a bilateral symmetry manner and enclose the bearing outer ring and the bearing inner ring together to form a hollow accommodating cavity, a steel ball is fixedly supported at the center of the accommodating cavity through a retainer, each sealing ring comprises a steel framework and an elastic sealing element coated outside the steel framework, the outer diameter end of each elastic sealing element is provided with a sealing bulge, the inner diameter end of each elastic sealing element is provided with a sealing lip, the sealing bulges can be embedded and matched with a preset sealing groove on the inner diameter surface of the bearing outer ring to realize the clearance fit type sealing of the accommodating cavity on the side of the bearing outer ring, the sealing lips are of a sheet structure, the outer circumferential surface of the bearing inner ring is provided with an arc-shaped groove, and one side boundary of the arc-shaped groove is arranged on one axial end surface of the bearing inner ring, the assembly of seal lip in the arc wall to be interference fit state with the arc wall contact, in order to realize that the holding chamber is sealed in the circumference girdle surface contact of bearing inner race side, the seal lip one side that deviates from the holding chamber in its axial still seted up the relief groove.
Preferably, the sealing bulge is also provided with a pressure relief groove on one side deviating from the accommodating cavity in the axial direction.
Preferably, the elastic sealing element is made of rubber.
Preferably, the steel skeleton is of an L-shaped structure with a downward opening.
Preferably, the sealing lip is in a circular ring sheet structure, and the inner diameter end of the sealing lip is in a tapered structure with a continuously reduced end part.
Preferably, the relief groove is provided on the seal lip at a position near the center of the seal ring.
Has the beneficial effects that:
1. according to the contact type bearing sealing structure, the arc-shaped groove formed in the outer diameter of the bearing inner ring is in contact with the sealing lip on the inner diameter of the sealing ring, so that the sealing lip is in contact deformation, circumferential annular belt surface contact is formed in the arc-shaped groove, and the circumferential surface contact annular belt is still kept under the high-temperature and low-temperature environment, so that the sealing performance is improved, and the service life and the reliability of the bearing are further improved.
2. According to the contact type bearing sealing structure, the interference magnitude between the arc-shaped groove and the sealing lip is increased due to a high-temperature environment, and the pressure reducing groove is formed in the upper part of the inner diameter of the sealing ring, so that the interaction force between the arc-shaped groove and the sealing lip can be effectively reduced, namely, the friction of sealing contact is reduced; under the low temperature environment, rely on the elastic deformation of seal lip, can guarantee that arc wall and seal lip have circumference face contact clitellum, can guarantee sealed effect under the effect of deformation force. The device has simple integral structure, reliable sealing and strong adaptability in wide-temperature environment, can prolong and improve the lubricating effect, and greatly prolongs the service life of the bearing.
Drawings
FIG. 1 is a schematic cross-sectional view of the structure of the present invention;
FIG. 2 is a schematic cross-sectional view of the seal ring when unassembled;
reference numerals: 1. the bearing comprises a bearing outer ring, 2, a bearing inner ring, 3, a sealing ring, 301, a steel skeleton, 302, an elastic sealing element, 3021, a sealing bulge, 3022, a sealing lip, 4, an accommodating cavity, 5, a retainer, 6, a steel ball, 7, a sealing groove, 8, an arc-shaped groove, 9 and a pressure reduction groove.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, the contact type bearing sealing structure of the present invention comprises a bearing outer ring 1, a bearing inner ring 2 and two sealing rings 3, wherein the two sealing rings 3 are symmetrically arranged between the bearing outer ring 1 and the bearing inner ring 2 in a left-right manner, and enclose the bearing outer ring 1 and the bearing inner ring 2 to form a hollow accommodating cavity 4, a steel ball 6 is fixedly supported at the center of the accommodating cavity 4 through a retainer 5, the sealing ring 3 is composed of a steel framework 301 and an elastic sealing element 302 covering the steel framework 301, the steel framework 301 is in an L-shaped structure with a downward opening, the elastic sealing element 302 is made of rubber, the elastic sealing element 302 is provided with a sealing protrusion 3021 at an outer diameter end thereof, and is provided with a sealing lip 2 at an inner diameter end thereof, the sealing protrusion 3021 can be fitted and matched with a sealing groove 3027 preset on the inner diameter surface of the bearing outer ring 1 in an embedded manner to realize the gap-fit type sealing of the accommodating cavity 4 at the bearing outer ring 1 side, the relief groove 9 has also been seted up to one side that sealed arch 3021 deviates from holding chamber 4 in its axial, seal lip 3022 be ring sheet structure, and seal lip 3022's internal diameter end is the taper structure that the tip constantly reduces, has seted up arc wall 8 at the outer circumferential surface of bearing inner circle 2, and a side boundary setting of this arc wall 8 is on bearing inner circle 2's an axial terminal surface, seal lip 3022 assemble in arc wall 8 to be the interference fit state with the contact of arc wall 8, in order to realize that holding chamber 4 is sealed in the circumferential ring area face contact of bearing inner circle 2 side, seal lip 3022 deviate from one side of holding chamber 4 in its axial and still seted up relief groove 9, and should state relief groove 9 sets up the position that is close to sealing washer 3 center department on seal lip 3022.
The invention relates to a contact type bearing sealing structure, wherein an arc-shaped groove is arranged on a flange of the outer diameter of a bearing inner ring, the arc-shaped groove is in contact with a sealing lip at the inner diameter of a sealing ring and is in an interference fit state, and when the arc-shaped groove is in contact with the inner diameter of the sealing ring, the elastic sealing piece on the sealing ring has elasticity, so that the sealing lip on the inner diameter of the sealing ring is deformed to form circumferential annular surface contact, contact force is generated, and sealing performance is realized. When the arc-shaped groove is matched with the sealing lip, the inner diameter of the sealing ring is ensured to be lower than the contact point for a certain length, and a pressure reducing groove is also arranged at the upper part of the inner diameter of the sealing lip which is contacted with the arc-shaped groove. In a high-temperature environment, the interference magnitude between the arc-shaped groove and the sealing lip is increased, and the upper part of the inner diameter of the sealing lip is provided with the pressure reducing groove, so that the interaction force between the arc-shaped groove and the sealing lip can be effectively reduced, namely, the friction of sealing contact is reduced; under the low temperature environment, mainly lean on the elastic deformation of the last elastic sealing member of sealing washer, guarantee that arc wall and seal lip have the circumference face and contact the clitellum, can guarantee sealed effect under the effect of deformation power. Therefore, the invention can better ensure the sealing effect, has stronger adaptability in wide-temperature environment, can prolong and improve the lubricating effect, and greatly improves the service life performance of the bearing.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will recognize that changes may be made in form and detail without departing from the spirit and scope of the invention. The invention is intended to cover all modifications, equivalents and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A contact type bearing sealing structure comprises a bearing outer ring (1), a bearing inner ring (2) and two sealing rings (3), wherein the two sealing rings (3) are arranged between the bearing outer ring (1) and the bearing inner ring (2) in a bilateral symmetry mode, and enclose the bearing outer ring (1) and the bearing inner ring (2) to form a hollow accommodating cavity (4), a steel ball (6) is fixedly supported at the center of the accommodating cavity (4) through a retainer (5), the sealing rings (3) are composed of a steel framework (301) and an elastic sealing element (302) coated on the outer side of the steel framework (301), a sealing bulge (3021) is arranged at the outer diameter end of the elastic sealing element (302), a sealing lip (3022) is arranged at the inner diameter end of the elastic sealing element, the sealing bulge (3021) can be matched with a sealing groove (7) preset on the inner diameter surface of the bearing outer ring (1) in an embedded mode, in order to realize holding chamber (4) in the sealed of bearing inner race (1) side, its characterized in that: seal lip (3022) be sheet structure, offered arc wall (8) at the outer circumferential surface of bearing inner race (2), the setting of a side boundary of this arc wall (8) is on the axial terminal surface of bearing inner race (2), seal lip (3022) assemble in arc wall (8) to be the interference fit state with arc wall (8) contact, in order to realize that holding chamber (4) are sealed in the circumference girdle surface contact of bearing inner race (2) side, seal lip (3022) deviate from one side of holding chamber (4) still seted up decompression groove (9) in its axial.
2. A contact bearing seal structure according to claim 1, wherein: the side of the sealing bulge (3021) which deviates from the accommodating cavity (4) in the axial direction is also provided with a pressure reducing groove (9).
3. A contact bearing seal structure according to claim 1, wherein: the elastic sealing element (302) is made of rubber.
4. A contact bearing seal structure according to claim 1, wherein: the steel skeleton (301) is of an L-shaped structure with a downward opening.
5. A contact bearing seal structure according to claim 1, wherein: the sealing lip (3022) is of a circular ring sheet structure, and the tail end of the inner diameter of the sealing lip (3022) is of a conical structure with an end part continuously reduced.
6. A contact bearing seal structure according to claim 1, wherein: the decompression groove (9) is arranged on the sealing lip (3022) at a position close to the center of the sealing ring (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210458903.9A CN114776714A (en) | 2022-04-28 | 2022-04-28 | Contact bearing seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210458903.9A CN114776714A (en) | 2022-04-28 | 2022-04-28 | Contact bearing seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114776714A true CN114776714A (en) | 2022-07-22 |
Family
ID=82432328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210458903.9A Pending CN114776714A (en) | 2022-04-28 | 2022-04-28 | Contact bearing seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114776714A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3499654A (en) * | 1966-01-17 | 1970-03-10 | Reliance Electric Co | Bearing-shaft sealing structure |
| CN2221680Y (en) * | 1995-01-24 | 1996-03-06 | 曹宗瑞 | Bearing contact efficient sealing structure |
| CN201277267Y (en) * | 2008-08-22 | 2009-07-22 | 宁波新大地轴承有限公司 | Sealing check ring and deep groove ball bearing employing the same |
| CN205226096U (en) * | 2015-12-28 | 2016-05-11 | 芜湖人本轴承有限公司 | Bearing sealing device |
| CN205618553U (en) * | 2015-12-25 | 2016-10-05 | 温州人本汽车轴承股份有限公司 | Bearing seal structure |
| CN207715566U (en) * | 2017-12-27 | 2018-08-10 | 哈尔滨轴承集团公司 | A kind of deep groove ball bearing sealing ring |
| CN209483819U (en) * | 2018-12-27 | 2019-10-11 | 无锡市利钧轴承有限公司 | Bearing sealed ring |
| CN110848266A (en) * | 2019-10-17 | 2020-02-28 | 钱潮轴承有限公司 | Bearing with inclined plane sealing structure |
| CN211398300U (en) * | 2019-12-09 | 2020-09-01 | 杭州人本中型轴承有限公司 | Unilateral waterproof type high-load bearing |
| CN213575154U (en) * | 2020-10-19 | 2021-06-29 | 浙江丰安精密机械有限公司 | Deep groove ball bearing |
-
2022
- 2022-04-28 CN CN202210458903.9A patent/CN114776714A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3499654A (en) * | 1966-01-17 | 1970-03-10 | Reliance Electric Co | Bearing-shaft sealing structure |
| CN2221680Y (en) * | 1995-01-24 | 1996-03-06 | 曹宗瑞 | Bearing contact efficient sealing structure |
| CN201277267Y (en) * | 2008-08-22 | 2009-07-22 | 宁波新大地轴承有限公司 | Sealing check ring and deep groove ball bearing employing the same |
| CN205618553U (en) * | 2015-12-25 | 2016-10-05 | 温州人本汽车轴承股份有限公司 | Bearing seal structure |
| CN205226096U (en) * | 2015-12-28 | 2016-05-11 | 芜湖人本轴承有限公司 | Bearing sealing device |
| CN207715566U (en) * | 2017-12-27 | 2018-08-10 | 哈尔滨轴承集团公司 | A kind of deep groove ball bearing sealing ring |
| CN209483819U (en) * | 2018-12-27 | 2019-10-11 | 无锡市利钧轴承有限公司 | Bearing sealed ring |
| CN110848266A (en) * | 2019-10-17 | 2020-02-28 | 钱潮轴承有限公司 | Bearing with inclined plane sealing structure |
| CN211398300U (en) * | 2019-12-09 | 2020-09-01 | 杭州人本中型轴承有限公司 | Unilateral waterproof type high-load bearing |
| CN213575154U (en) * | 2020-10-19 | 2021-06-29 | 浙江丰安精密机械有限公司 | Deep groove ball bearing |
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