CN107165941A - A kind of deep groove ball bearing hermetic water-proof structure - Google Patents
A kind of deep groove ball bearing hermetic water-proof structure Download PDFInfo
- Publication number
- CN107165941A CN107165941A CN201710556173.5A CN201710556173A CN107165941A CN 107165941 A CN107165941 A CN 107165941A CN 201710556173 A CN201710556173 A CN 201710556173A CN 107165941 A CN107165941 A CN 107165941A
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- CN
- China
- Prior art keywords
- sealing ring
- ring
- skeleton
- ball bearing
- sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- 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
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
- F16C33/585—Details of specific parts of races of raceways, e.g. ribs to guide the rollers
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The present invention relates to a kind of deep groove ball bearing hermetic water-proof structure, including inner ring, outer ring, steel ball, retainer and sealing device, it is correspondingly arranged on respectively on the inner ring and the outer ring and accommodates interior raceway groove and outer raceway groove that the steel ball is slided；The interior raceway groove and the outer raceway groove are the composite channels that the curvature and monosymmetric circular arc for being more than the steel ball by two sections of curvature are constituted, and the sealing device includes the first sealing ring and the second sealing ring；First sealing ring is arranged on the side of the inner ring and the outer ring, and second sealing ring is arranged on the opposite side of the inner ring and the outer ring.Inner ring is formed the enclosed environment of vacuum with outer ring, prevent the entrance of dust and steam, the sealing effectiveness of deep groove ball bearing has been effectively ensured.
Description
Technical field
The present invention relates to deep groove ball bearing technical field, more particularly to a kind of deep groove ball bearing hermetic water-proof structure.
Background technology
Deep groove ball bearing is the type that current rolling bearing is generally used, substantially by inner ring, outer ring, one group of steel
Ball and retainer composition, zanjon spherical structure also includes closed type deep-groove ball, mainly by the good dust seal cover of steel plate materialses punching press
Simple sealing effectiveness will be formed between Internal and external cycle, but only serving simply prevents dust from being acted on into raceway, waterproof
Effect is poor, and lubricant grease easily exposes, once and bearing is intake at work, then can reduce grease lubrication, increase the mill of bearing
Damage, the life-span for ultimately resulting in bearing subtracts or even damaged greatly, so as to cause the generation of production accident.
The content of the invention
In view of the above-mentioned state of the art, the technical problems to be solved by the invention are to provide a kind of good sealing effect
Deep groove ball bearing hermetic water-proof structure, the good sealing effect of the hermetic water-proof structure, water proof and dust proof, effectively protection bearing just
It is often stable to use.
Technical scheme
A kind of deep groove ball bearing hermetic water-proof structure, including inner ring, outer ring, steel ball, retainer and sealing device, it is described interior
It is correspondingly arranged on respectively on circle and the outer ring and accommodates interior raceway groove and outer raceway groove that the steel ball is slided；The interior raceway groove and described
Outer raceway groove is the composite channel that the curvature and monosymmetric circular arc for being more than the steel ball by two sections of curvature are constituted, described close
Seal apparatus includes the first sealing ring and the second sealing ring；First sealing ring is arranged on the one of the inner ring and the outer ring
Side, second sealing ring is arranged on the opposite side of the inner ring and the outer ring；The is enclosed with the inside of first sealing ring
There is the first bending part towards the horizontally arranged of the steel ball at the top of one skeleton, first skeleton；The outer ring correspondence is described
One side bottom of the first sealing ring, which is provided with, can accommodate the bottom neck of insertion at the top of first sealing ring, the inner ring correspondence
The side in first outer ring portion is provided with the inner ring neck for accommodating the first sealing ring bottom insertion；In first sealing ring
Portion is provided with the first inclined-plane lip extended towards the retainer direction；Receiving described the is provided with the top of first sealing ring
First skeleton slot of one bending part insertion, the inclined-plane lip is provided with the inclined-plane lip slot for accommodating the first skeleton bottom；With
It is easy to the first skeleton to be fixed at the top of first sealing ring between the inclined-plane lip；It is provided with the inside of second sealing ring
Second skeleton, the equal level in top of second sealing ring and second skeleton is sequentially provided with the second folding towards the steel ball direction
Turn of bilge and the 3rd bending part, the second bending part of second sealing ring wrap up the 3rd bending part of second skeleton, institute
State the top of the outer ring top neck fixed provided with the second bending part insertion is accommodated；The second sealing ring bottom is provided with appearance
Receive the second skeleton slot of the second skeleton bottom insertion；L-type support is provided with the outside of second sealing ring, described second is close
Seal bottom extends to form an extension to the vertical component effect of the L-type support, and the L-type support top is vertical component effect provided with receiving
The support slot of the extension insertion；The inner ring bottom is provided with the fixation open-work that level runs through, the bottom of the L-type support
Horizontal segment, which is horizontally inserted the open-work, to be used to be fixed on inner ring bottom.
The angle of the extension and second sealing ring is 30 ° -60 °.
The extension bottom is provided with the second inclined-plane lip；The inclined-plane of second inclined-plane lip and the extension
Angle is 90 degree.
Breach is provided between the bottom of second sealing ring and the L-type support.
The bottom neck draws section in close to end face side provided with curved surface, sliding after being inserted at the top of the first sealing ring for preventing
Go out.
The outside of first sealing ring is provided with the 3rd skeleton.
The L-type support uses plastics or resin material.
The retainer uses nylon material.
A kind of deep groove ball bearing, using a kind of above-mentioned deep groove ball bearing hermetic water-proof structure.
Beneficial effect：
The technical scheme provided using the present invention, compared with prior art, is had the advantages that：
A kind of deep groove ball bearing hermetic water-proof structure of the present invention, is provided with composite channel, inner ring contact point and outer ring connect
Contact is changed into two point of contacts by a point of contact of traditional structure, makes the big increase of the axial large carrying capacity of bearing, can also increase it
Radial direction bearing capacity；Inner ring side corresponding with outer ring can be formed good sealing effectiveness by the first sealing ring prevents dust and water
The entrance of gas, the second sealing is coordinated by extension and the insertion of L-type support vertical section, inner ring is formed the envelope of vacuum with outer ring
Closed loop border, prevents the entrance of dust and steam, and the sealing effectiveness of deep groove ball bearing has been effectively ensured.When second sealing ring
Loaded between bottom and the L-type support after lubricant grease, passed through the squeezing into lubricant grease to interior of the pressing to extension
Between circle and outer ring, it is ensured that to the lubrication of steel ball, the life-span is lifted.
Brief description of the drawings
Fig. 1 is a kind of deep groove ball bearing hermetic water-proof structure cross section structure schematic diagram in the present invention.
Fig. 2 is close-up schematic view at A in Fig. 1.
Fig. 3 is close-up schematic view at B in Fig. 1.
Drawing reference numeral：
Inner ring 1, outer ring 2, interior raceway groove 3, outer raceway groove 4, steel ball 5, retainer 6, the first sealing ring 7, the second sealing ring 8, the
One skeleton 9, the first bending part 10, bottom neck 11, inner ring neck 12, the first inclined-plane lip 13, the first skeleton slot 14, inclined-plane
Lip slot 15, the second skeleton 16, the second bending part 17, the 3rd bending part 18, top neck 19, the second skeleton slot 20, L-type
Support 21, vertical component effect 22, horizontal segment 23, extension 24, support slot 25, fixed open-work 26, the second inclined-plane lip 27, curved surface is received
Hold together section 28, the 3rd skeleton 29, breach 30.
Embodiment
Further understand and recognize to make to have architectural feature of the invention and the effect reached, to preferably
Embodiment and accompanying drawing coordinate detailed description, are described as follows：
As shown in Figure 1 to Figure 3, the invention discloses a kind of deep groove ball bearing hermetic water-proof structure, including inner ring 1, outer ring
2nd, steel ball 5,6 groups of retainer and sealing device, wherein, it is correspondingly arranged on respectively on inner ring 1 and outer ring 2 and accommodates what steel ball 5 was slided
Interior raceway groove 3 and outer raceway groove 4；Interior raceway groove 3 and outer raceway groove 4 are the curvature and monosymmetric circle for being more than steel ball 5 by two sections of curvature
The composite channel that arc is constituted, the contact point of inner ring 1 and the contact point of outer ring 2 are changed into two point of contacts by a point of contact of traditional structure,
Make the big increase of the axial large carrying capacity of bearing, can also increase its radial direction bearing capacity.
Sealing device includes the first sealing ring 7 and the second sealing ring 8；First sealing ring 7 is arranged on inner ring 1 and outer ring 2
Side, the second sealing ring 8 is arranged on the opposite side of inner ring 1 and outer ring 2；The inner side of first sealing ring 7 is enclosed with the first skeleton 9, the
There is the first bending part 10 at the top of one skeleton 9 towards the horizontally arranged of steel ball 5；One side bottom of the first sealing ring 7 of correspondence of outer ring 2
Provided with that can accommodate the bottom neck 11 of the top of the first sealing ring 7 insertion, the side of the correspondence of inner ring 1 first outer ring 2 is provided with appearance
Receive the bottom of the first sealing ring 7 insertion inner ring neck 12；The middle part of first sealing ring 7 is provided with the extended towards the direction of retainer 6
One inclined-plane lip 13；The top of first sealing ring 7 is provided with the first skeleton slot 14 for accommodating the insertion of the first bending part 10, inclined-plane lip
Side is provided with the inclined-plane lip slot 15 for accommodating the bottom of the first skeleton 9；In order to which the first skeleton 9 is fixed on the top of the first sealing ring 7
Between inclined-plane lip；Inner ring 1 and the correspondence side of outer ring 2 are formed good sealing effectiveness and prevent the entrance of dust and aqueous vapor.
Further, the inner side of the second sealing ring 8 is provided with the top of the second skeleton 16, the second sealing ring 8 and the second skeleton 16
Equal level is sequentially provided with the second bending part 17 and the 3rd bending part 18, the second bending part 17 of the second sealing ring 8 towards the direction of steel ball 5
3rd bending part 18 of the second skeleton 16 is wrapped up, the top of outer ring 2 is embedded in fixed top provided with the second bending part 17 is accommodated
Neck 19；The bottom of second sealing ring 8 is provided with the second skeleton slot 20 for accommodating the insertion of the bottom of the second skeleton 16；Second sealing ring 8
Outside is provided with L-type support 21, and the bottom of the second sealing ring 8 forms extension 24, L-type branch to the extension of vertical component effect 22 of L-type support 21
The top of frame 21 is vertical component effect 22 provided with the support slot 25 for accommodating the insertion of extension 24；The bottom of inner ring 1 is provided with consolidating that level runs through
Determine open-work 26, the bottom level section 23 of L-type support 21, which is horizontally inserted open-work, to be used to be fixed in inner ring 1.Second sealing is by prolonging
The insertion for stretching section 24 and the vertical section of L-type support 21 coordinates, and inner ring 1 is formed the enclosed environment of vacuum with outer ring 2, prevent dust with
The entrance of steam, has been effectively ensured the sealing effectiveness of deep groove ball bearing.It is preferred that, bottom and the L of second sealing ring 8
Breach 30 is provided between type support 21, the bottom of extension 24 is provided with the second inclined-plane lip 27；The inclined-plane of second inclined-plane lip 27
Angle with extension 24 is 90 degree, lubricant grease formation thrust can be increased grease and lead to composite channel, formed after pressing
To the good lubrication of steel ball 5.When having loaded lubricant grease (not between the bottom of second sealing ring 8 and the L-type support 21
Show) after, lubricant grease is squeezed into the compound ditch between inner ring 1 and outer ring 2 along breach by the pressing to extension 24
Road, it is ensured that to the lubrication of steel ball 5, lifts the life-span.
It is preferred that, the angle of the sealing ring 8 of extension 24 and second is 30 °~60 °, the second sealing ring 8 and L-type support 21
Support effect is good, effective guarantee sealing effectiveness.
It is preferred that, bottom neck 11 draws section 28 in close to end face side provided with curved surface, for preventing the top of the first sealing ring 7
Skidded off after insertion.
It is preferred that, the outside of the first sealing ring 7 is provided with the 3rd skeleton 29, and the sealing that the first sealing ring 7 has been effectively ensured is steady
It is qualitative.
It is preferred that, L-type support 21 uses plastics or resin material, gentlier, is hardly damaged.
It is preferred that, retainer 6 uses nylon material, and intensity is big, lifts durability.
A kind of deep groove ball bearing is also disclosed in the present invention, a kind of above-mentioned deep groove ball bearing sealing waterproof knot is employed
Structure.
Specifically, disclosing deep groove ball bearing in the present invention, its contact point of inner ring 1 and the contact point of outer ring 2 are by conventional junction
One point of contact of structure is changed into two point of contacts, makes the big increase of the axial large carrying capacity of bearing, can also increase its radial direction bearing capacity；The
Inner ring 1 and the correspondence side of outer ring 2 can be formed good sealing effectiveness and prevent the entrance of dust and aqueous vapor by one sealing ring 7, the
Two sealings are coordinated by extension 24 and the insertion of the vertical section of L-type support 21, inner ring 1 is formed the closed-loop of vacuum with outer ring 2
Border, prevents the entrance of dust and steam, and the sealing effectiveness of deep groove ball bearing has been effectively ensured.When the bottom of second sealing ring 8
Loaded between portion and the L-type support 21 after lubricant grease, by the pressing to extension 24 by lubricant grease squeeze into
Between inner ring 1 and outer ring 2, it is ensured that to the lubrication of steel ball 5, the life-span is lifted.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those of skill in the art that it still can be right
Technical scheme described in previous embodiment is modified, or which part technical characteristic is replaced on an equal basis；And these
Modification is replaced, and the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (9)
1. a kind of deep groove ball bearing hermetic water-proof structure, it is characterised in that：Including inner ring, outer ring, steel ball, retainer and sealing dress
Put, be correspondingly arranged on respectively on the inner ring and the outer ring and accommodate interior raceway groove and outer raceway groove that the steel ball is slided；In described
Raceway groove and the outer raceway groove are the compound ditches that the curvature and monosymmetric circular arc for being more than the steel ball by two sections of curvature are constituted
Road, the sealing device includes the first sealing ring and the second sealing ring；First sealing ring is arranged on the inner ring and described
The side of outer ring, second sealing ring is arranged on the opposite side of the inner ring and the outer ring；On the inside of first sealing ring
Be enclosed with the top of the first skeleton, first skeleton has the first bending part towards the horizontally arranged of the steel ball；The outer ring
One side bottom of correspondence first sealing ring, which is provided with, can accommodate the bottom neck of insertion at the top of first sealing ring, described
The side in inner ring correspondence first outer ring portion is provided with the inner ring neck for accommodating the first sealing ring bottom insertion；Described first
The the first inclined-plane lip extended towards the retainer direction is provided with the middle part of sealing ring；Appearance is provided with the top of first sealing ring
The first skeleton slot that first bending part of receiving is inserted, the inclined-plane lip is provided with the inclined-plane lip for accommodating the first skeleton bottom
Slot；In order to which the first skeleton is fixed at the top of first sealing ring between the inclined-plane lip；Second sealing ring
Inner side is provided with the second skeleton, and the equal level in top of second sealing ring and second skeleton is set successively towards the steel ball direction
There are the second bending part and the 3rd bending part, the second bending part of second sealing ring is by the 3rd bending part of second skeleton
Parcel, the top of the outer ring is provided with the top neck for accommodating the second bending part insertion fixation；The second sealing ring bottom
Portion is provided with the second skeleton slot for accommodating the second skeleton bottom insertion；L-type support, institute are provided with the outside of second sealing ring
State the second sealing ring bottom to extend to form an extension to the vertical component effect of the L-type support, the L-type support top is vertical component effect
Provided with the support slot for accommodating the extension insertion；The inner ring bottom is provided with the fixation open-work that level runs through, the L-type branch
The bottom level section of frame, which is horizontally inserted the open-work, to be used to be fixed on inner ring bottom.
2. a kind of deep groove ball bearing hermetic water-proof structure according to claim 1, it is characterised in that：The extension and institute
The angle for stating the second sealing ring is 30 ° -60 °.
3. a kind of deep groove ball bearing hermetic water-proof structure according to claim 1, it is characterised in that：The extension bottom
It is provided with the second inclined-plane lip；The inclined-plane of second inclined-plane lip and the angle of the extension are 90 degree.
4. a kind of deep groove ball bearing hermetic water-proof structure according to claim 1, it is characterised in that：Second sealing ring
Bottom and the L-type support between be provided with breach.
5. a kind of deep groove ball bearing hermetic water-proof structure according to claim 1, it is characterised in that：The bottom neck is leaned on
Proximal end face side draws section in provided with curved surface, for preventing from skidding off after inserting at the top of the first sealing ring.
6. a kind of deep groove ball bearing hermetic water-proof structure according to claim 1, it is characterised in that：First sealing ring
Outside be provided with the 3rd skeleton.
7. a kind of deep groove ball bearing hermetic water-proof structure according to claim 1, it is characterised in that：The L-type support is adopted
With plastics or resin material.
8. a kind of deep groove ball bearing hermetic water-proof structure according to claim 1, it is characterised in that：The retainer is used
Nylon material.
9. a kind of deep groove ball bearing, it is characterised in that：It is anti-using a kind of deep groove ball bearing sealing described in one of claim 1-8
Water-bound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710556173.5A CN107165941B (en) | 2017-06-24 | 2017-06-24 | A kind of deep groove ball bearing hermetic water-proof structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710556173.5A CN107165941B (en) | 2017-06-24 | 2017-06-24 | A kind of deep groove ball bearing hermetic water-proof structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107165941A true CN107165941A (en) | 2017-09-15 |
| CN107165941B CN107165941B (en) | 2019-09-06 |
Family
ID=59823491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710556173.5A Active CN107165941B (en) | 2017-06-24 | 2017-06-24 | A kind of deep groove ball bearing hermetic water-proof structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107165941B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110159660A (en) * | 2019-05-09 | 2019-08-23 | 宁波丰茂远东橡胶有限公司 | A kind of oil enveloping structure of high-speed train bearing |
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| CN204921712U (en) * | 2015-08-19 | 2015-12-30 | 安阳百瑞英机械有限责任公司 | Car transmission shaft bearing seal structure that prevents dust |
| CN205578509U (en) * | 2016-03-11 | 2016-09-14 | 泛科轴承集团有限公司 | Modified insert bearing sealing device |
| CN205780345U (en) * | 2016-05-30 | 2016-12-07 | 浙江省新昌新轴实业有限公司 | A kind of double-row conical bearing of good airproof performance |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001020960A (en) * | 1999-07-08 | 2001-01-23 | Nachi Fujikoshi Corp | Unit seal bearing |
| CN200975418Y (en) * | 2006-12-02 | 2007-11-14 | 瓦房店轴承集团有限责任公司 | Deep trench ball bearing seal assembly |
| JP2009063118A (en) * | 2007-09-07 | 2009-03-26 | Nsk Ltd | Rolling bearing |
| CN201524698U (en) * | 2009-09-08 | 2010-07-14 | 湖北精特轴承有限公司 | Durable mill special bearing |
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| JP2015209954A (en) * | 2014-04-30 | 2015-11-24 | Ntn株式会社 | Pulley unit |
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| CN205780345U (en) * | 2016-05-30 | 2016-12-07 | 浙江省新昌新轴实业有限公司 | A kind of double-row conical bearing of good airproof performance |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110159660A (en) * | 2019-05-09 | 2019-08-23 | 宁波丰茂远东橡胶有限公司 | A kind of oil enveloping structure of high-speed train bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107165941B (en) | 2019-09-06 |
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