CN110273921A - A kind of full working scope composite construction sliding bearing - Google Patents
A kind of full working scope composite construction sliding bearing Download PDFInfo
- Publication number
- CN110273921A CN110273921A CN201910509183.2A CN201910509183A CN110273921A CN 110273921 A CN110273921 A CN 110273921A CN 201910509183 A CN201910509183 A CN 201910509183A CN 110273921 A CN110273921 A CN 110273921A
- Authority
- CN
- China
- Prior art keywords
- pit
- sliding bearing
- dimple
- composite construction
- sliding
- 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.)
- Pending
Links
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
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
- F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
- F16C33/107—Grooves for generating pressure
Abstract
The invention belongs to sliding bearing technical fields, disclose a kind of full working scope composite construction sliding bearing, triple compound texture are provided on the sliding surface of sliding bearing, triple compound texture include the pit group being evenly arranged on the sliding surface of sliding bearing, and each pit group includes the first pit, second dimple and third pit；First pit has the characteristics that the small depth of diameter is big, suitable for low-speed heave-load operating condition and plays the role of noise-and-vibration-reduction；Second dimple has the characteristics that the big depth as shallow of diameter, makes bearing be easier to reach hydrodynamic lubrication state suitable for the low load operating condition of high speed；Third pit has the characteristics that the moderate depth of diameter is moderate, suitable for top load operating condition middling speed for operating condition cataclysm steady-working state in the transition short time.The present invention designs reasonable multiple texture on sliding bearing, to promote the comprehensive performance of sliding friction auxiliary structure, coefficient of friction and wear rate is effectively reduced, and accelerates oil film film forming, improves bearing capacity, wear-resisting property, service life.
Description
Technical field
The present invention relates to sliding bearing technical fields, in particular to a kind of full working scope composite sliding bearing.
Background technique
Friction auxiliary structure is the important feature form of rotating machinery, directly influences the safety and stable operation of equipment, with
Various work mechanisms to heavy duty, precise treatment and high speed development, the requirement to friction auxiliary structure is continuously improved, secondary in friction
It is a kind of important technical for improving friction, lubrication performance that body structure surface, which processes regular morphology (also referred to as Surface Texture),.It passes
System friction auxiliary structure low load working condition suitable for high speed, increases calorific value there are coefficient of friction under high-speed overload operating condition and increases,
The auxiliary structure that rubs generates the defects of secondary oil film of thermal deformation friction fails.
Current technology is to increase sliding bearing in a certain specific operation in friction one texture of auxiliary structure surface work sheet
The anti-friction performance of (high-speed overload), but friction mill is still easy to produce under other operating conditions (load etc. in low-speed heave-load, low speed)
Damage causes flexible deformation, reduces the stability of oil film carrying, interferes the steady operation of sliding bearing.
Summary of the invention
The present invention puts forth effort on various technical problems such as solution friction auxiliary structure wearability, vibration and noise reducing and intensity,
Overcome single texture friction auxiliary structure to act only under specific operation, under full working scope high speed alternating load fretting wear it is serious,
Calorific value increase and the disadvantages of vulnerable oil film, reasonable multiple texture is designed on sliding bearing, to promote sliding friction
Coefficient of friction and wear rate is effectively reduced in the comprehensive performance of auxiliary structure, accelerates oil film film forming, improves bearing capacity, wearability
Energy, service life, finally obtain with strong wearability, low-friction coefficient, good noise-and-vibration-reduction performance and high bearing capacity
Full working scope composite construction sliding bearing.
In order to solve the above-mentioned technical problem, the present invention is achieved by technical solution below:
A kind of full working scope composite construction sliding bearing, including sliding bearing are provided on the sliding surface of the sliding bearing
Triple compound texture, triple compound texture include the pit group being evenly arranged on the sliding surface of the sliding bearing, often
A pit group includes the first pit, second dimple and third pit；
The maximal axial extension of first pit is 1-50 microns, maximum radial dimension is 2-5 microns；Described second is recessed
The maximal axial extension in hole is 50-100 microns, maximum radial dimension is 5-30 microns；The maximum axial ruler of the third pit
100-500 microns very little, maximum radial dimension is depth 0.2-2 microns.
Further, the sliding of first pit, the second dimple and the third pit in the sliding bearing
The accounting range in face is 1-30%.
Further, first pit, the second dimple and the third pit in each pit group according to
It is secondary in the axial direction equidistantly along arranged in a straight line.
Further, first pit, the second dimple and the third pit in each pit group are pressed
It is arranged according to triangle endpoint location.
Further, the radial section of first pit, the second dimple and the third pit is rectangle, semicircle
Shape, triangle, any one in inverted trapezoidal.
Further, the axial cross section of first pit, the second dimple and the third pit is round, oval
Shape, it is partially circular, polygonal in any one.
The beneficial effects of the present invention are:
The present invention uses triple compound texture, optimizes, obtains to sliding bearing surface texture distribution in friction auxiliary structure
It is sliding to the full working scope composite construction with strong wearability, low-friction coefficient, good noise-and-vibration-reduction performance and high bearing capacity
Dynamic bearing.
The present invention plays a role in triple compound texture of sliding bearing surface layout using pit group as basic unit, pit
It include three kinds of different pits in group.The present invention is laid out by reasonable texture, so that the bearing capacity on sliding bearing surface
Close with the bearing of smooth surface, frictional behaviour is better than smooth surface bearing；Under actual condition, sliding bearing is whole not
It is to be constantly under the conditions of steady operation, by non-uniform Distribution power elastic deformation is occurred for the load-bearing surface of sliding bearing, by excellent
Change compared with the bearing capacity of shallow pits enhancing sliding bearing in the pit group of texture arrangement, while the deep diameter pit cooperated can drop again
Low friction coefficient improves greasy property.Pit group reduces sliding bearing maximum oil film pressure and frictional force, minimum oil film thickness
Increase, sliding bearing operation is more stable, and verifies by actual experiment, and smooth no texture sliding bearing is simulating practical work
Fretting wear is serious in loading experiment under condition, and coefficient of friction is larger；Using the sliding bearing of triplex texture in above-mentioned same item
Superslide state and stable working state are rapidly entered in part experiment.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of full working scope composite construction sliding bearing provided by embodiment 1 in the present invention；
Fig. 2 is the electron microscope of full working scope composite construction sliding bearing provided by embodiment 1 in the present invention；
Fig. 3 is the structural schematic diagram of full working scope composite construction sliding bearing provided by embodiment 2 in the present invention；
Fig. 4 is the electron microscope of full working scope composite construction sliding bearing provided by embodiment 2 in the present invention；
Fig. 5 is the friction coefficient time variation diagram of full working scope composite construction sliding bearing provided by the present invention；
Fig. 6 is the friction coefficient time variation diagram of smooth no texture sliding bearing.
In above-mentioned figure: 1- sliding bearing；100- sliding surface；The first pit of 101-；102- second dimple；103- third is recessed
Hole.
Specific embodiment
Below by specific embodiment, the present invention is described in further detail:
Following embodiment can make those skilled in the art that the present invention be more completely understood, but not limit this in any way
Invention.
Embodiment 1:
As depicted in figs. 1 and 2, a kind of full working scope composite construction sliding bearing, including sliding bearing are present embodiments provided
1, triple compound texture are provided on the sliding surface of sliding bearing 1, and triple compound texture include multiple pit groups, multiple pits
Group is evenly arranged on the sliding surface 100 of sliding bearing 1.
Each pit group includes the first pit 101, second dimple 102 and third pit 103.First pit 101, second is recessed
Hole 102 and third pit 103 the sliding surface 100 of sliding bearing 1 accounting range be 1-30%.
The full-size of each first pit 101 in the axial direction is 1-50 microns, full-size in the radial direction is 2-5 micro-
Rice.The full-size of each second dimple 102 in the axial direction is 50-100 microns, full-size in the radial direction is 5-30 micro-
Rice.The full-size of each third pit 103 in the axial direction is 100-500 microns, full-size in the radial direction is 0.2-2
Micron.
In the present embodiment, the first pit 101, second dimple 102 and the third pit 103 in each pit group are with it
Central point successively linearly linear arrangement in the axial direction, and between the first pit 101 and second dimple 102, second
Spaced set between pit 102 and third pit 103.Between first pit 101, second dimple 102 and third pit 103
Spacing range be 1-999 microns；To keep 1 structure of sliding bearing more reasonable, it is preferable that spacing is 100- inside pit group
500 microns；It is further preferred that spacing is 150 microns inside pit group.It is possible thereby to make the surface texture of sliding bearing 1
More rationally.It is required to consider that actual condition demand is joined again along distribution spacing axially and radially between pit group and pit group
With setting.
The shape of first pit 101, second dimple 102 and third pit 103 can be there are many selection, and radial section can
To be rectangle, semicircle, triangle, inverted trapezoidal etc., axial cross section can be round, oval, partially circular, polygonal
Etc..
First pit 101 has the characteristics that the small depth of diameter is big, suitable for low-speed heave-load operating condition and plays noise-and-vibration-reduction
Effect；Second dimple 102 has the characteristics that the big depth as shallow of diameter, makes bearing be easier to reach dynamic suitable for the low load operating condition of high speed
Pressure lubricating state；Third pit 103 has the characteristics that the moderate depth of diameter is moderate, and top load operating condition is used for suitable for middling speed
Operating condition cataclysm steady-working state in the transition short time.The present embodiment is by the first pit 101 in pit group, second dimple 102
It is linearly arranged in the axial direction in order with third pit 103, compared with the bearing capacity of shallow pits enhancing bearing in pit group, together
The deep diameter pit of Shi Peihe can reduce friction factor again and improve greasy property, and moderate pit steady-working state increases preceding two
The maximal work range of kind pit, the vibration resistance of reinforced shaft, while linear array can adjust maximum oil film pressure, increase
Minimum oil film thickness reduces the influence of elastic deformation bring operating condition shakiness.As shown in Figure 5 and Figure 6, it is tested by actual experiment
Card, the fretting wear in simulating the loading experiment under actual condition of smooth no texture bearing is serious, and coefficient of friction is larger (Fig. 6)；
And the sliding bearing 1 using triple compound texture of the present embodiment rapidly enters superslide state and work in above-mentioned same condition experiment
Make in stable condition (Fig. 5).
Embodiment 2:
As shown in Figure 3 and Figure 4, a kind of full working scope composite construction sliding bearing, including sliding bearing are present embodiments provided
1, triple compound texture are provided on the sliding surface of sliding bearing 1, and triple compound texture include multiple pit groups, multiple pits
Group is evenly arranged on the sliding surface 100 of sliding bearing 1.
Each pit group includes the first pit 101, second dimple 102 and third pit 103.First pit 101, second is recessed
Hole 102 and third pit 103 the sliding surface 100 of sliding bearing 1 accounting range be 1-30%.
The full-size of each first pit 101 in the axial direction is 1-50 microns, full-size in the radial direction is 2-5 micro-
Rice.The full-size of each second dimple 102 in the axial direction is 50-100 microns, full-size in the radial direction is 5-30 micro-
Rice.The full-size of each third pit 103 in the axial direction is 100-500 microns, full-size in the radial direction is 0.2-2
Micron.
In the present embodiment, the first pit 101, second dimple 102 and the third pit 103 in each pit group are with it
Central point is arranged according to three endpoint locations of triangle, i.e., between the first pit 101 and second dimple 102, second dimple
Spaced set between 102 and third pit 103.Between between first pit 101, second dimple 102 and third pit 103
It is 1-999 microns away from range；To keep 1 structure of sliding bearing more reasonable, it is preferable that spacing is that 100-500 is micro- inside pit group
Rice；It is further preferred that spacing is 150 microns inside pit group.It is possible thereby to make the surface texture of sliding bearing 1 more
Rationally.It is required to consider that actual condition demand participates in setting again along distribution spacing axially and radially between pit group and pit group
It is fixed.
The shape of first pit 101, second dimple 102 and third pit 103 can be there are many selection, and radial section can
To be rectangle, semicircle, triangle, inverted trapezoidal etc., axial cross section can be round, oval, partially circular, polygonal
Etc..
First pit 101 has the characteristics that the small depth of diameter is big, suitable for low-speed heave-load operating condition and plays noise-and-vibration-reduction
Effect；Second dimple 102 has the characteristics that the big depth as shallow of diameter, makes bearing be easier to reach dynamic suitable for the low load operating condition of high speed
Pressure lubricating state；Third pit 103 has the characteristics that the moderate depth of diameter is moderate, and top load operating condition is used for suitable for middling speed
Operating condition cataclysm steady-working state in the transition short time.The present embodiment is by the first pit 101 in pit group, second dimple 102
With third pit 103 according to rounded projections arranged, compared with the bearing capacity of shallow pits enhancing bearing in pit group, while the depth cooperated
Diameter pit can reduce friction factor again and improve greasy property, and moderate pit steady-working state increases the pole of first two pit
Limit working range, the vibration resistance of reinforced shaft, while rounded projections arranged makes sliding shaft body 1 non-linear exciting-vibration force (oil occur again
Membrane forces, sealing force, uneven steam pressure) induce system unstability when or eccentric vibrating operating condition under stability increase substantially,
It plays to vibrate reduction and reduces friction factor steady-working state with positive effect.
Although the preferred embodiment of the present invention is described above in conjunction with attached drawing, the invention is not limited to upper
The specific embodiment stated, the above mentioned embodiment is only schematical, be not it is restrictive, this field it is general
Logical technical staff under the inspiration of the present invention, when not departing from invention objective and scope of the claimed protection, may be used also
By make it is many in the form of specific transformation, within these are all belonged to the scope of protection of the present invention.
Claims (6)
1. a kind of full working scope composite construction sliding bearing, including sliding bearing, which is characterized in that the sliding surface of the sliding bearing
On be provided with triple compound texture, triple compound texture include be evenly arranged in it is recessed on the sliding surface of the sliding bearing
Hole group, each pit group include the first pit, second dimple and third pit；
The maximal axial extension of first pit is 1-50 microns, maximum radial dimension is 2-5 microns；The second dimple
Maximal axial extension is 50-100 microns, maximum radial dimension is 5-30 microns；The maximal axial extension of the third pit
100-500 microns, maximum radial dimension be depth 0.2-2 microns.
2. a kind of full working scope composite construction sliding bearing according to claim 1, which is characterized in that first pit,
The accounting range of the sliding surface of the second dimple and the third pit in the sliding bearing is 1-30%.
3. a kind of full working scope composite construction sliding bearing according to claim 1, which is characterized in that each pit group
Interior first pit, the second dimple and the third pit is successively in the axial direction equidistantly along arranged in a straight line.
4. a kind of full working scope composite construction sliding bearing according to claim 1, which is characterized in that each pit group
Interior first pit, the second dimple and the third pit is arranged according to triangle endpoint location.
5. a kind of full working scope composite construction sliding bearing according to claim 1, which is characterized in that first pit,
The radial section of the second dimple and the third pit is rectangle, semicircle, triangle, any one in inverted trapezoidal.
6. a kind of full working scope composite construction sliding bearing according to claim 1, which is characterized in that first pit,
The axial cross section of the second dimple and the third pit is any one in round, oval, partially circular, polygonal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910509183.2A CN110273921A (en) | 2019-06-13 | 2019-06-13 | A kind of full working scope composite construction sliding bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910509183.2A CN110273921A (en) | 2019-06-13 | 2019-06-13 | A kind of full working scope composite construction sliding bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110273921A true CN110273921A (en) | 2019-09-24 |
Family
ID=67962141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910509183.2A Pending CN110273921A (en) | 2019-06-13 | 2019-06-13 | A kind of full working scope composite construction sliding bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110273921A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111822733A (en) * | 2020-06-30 | 2020-10-27 | 天津大学 | Dynamic and static pressure sliding ceramic main shaft device |
| CN111828480A (en) * | 2020-06-30 | 2020-10-27 | 天津大学 | Anti-impact sliding main shaft device |
| CN115013437A (en) * | 2022-06-29 | 2022-09-06 | 中国地质大学（北京） | Long-life ultralow-friction solid lubrication sliding bearing assembly for spacecraft |
| CN116181803A (en) * | 2023-03-08 | 2023-05-30 | 西南石油大学 | Bearing bush gradient surface texture for improving lubricating capacity of sliding bearing of fracturing pump |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3386783A (en) * | 1964-05-02 | 1968-06-04 | Schmidt Gmbh Karl | Anti-friction bearing |
| EP1231393A1 (en) * | 2001-02-09 | 2002-08-14 | Nissan Motor Co., Ltd. | Low friction sliding element for a reciprocating engine |
| US20040228554A1 (en) * | 2003-05-15 | 2004-11-18 | Daido Metal Company Ltd. | Sliding member |
| KR20060121343A (en) * | 2005-05-24 | 2006-11-29 | 노병후 | Externally pressurized journal bearings with different supply holes |
| CN103211666A (en) * | 2013-04-25 | 2013-07-24 | 南京理工大学 | Artificial joint bearing surface micro-hole texture capable of improving lubricating performance and abrasion-resistant performance |
| WO2015041048A1 (en) * | 2013-09-18 | 2015-03-26 | イーグル工業株式会社 | Sliding component |
| CN103527632B (en) * | 2013-09-27 | 2017-03-01 | 昆山欣海韵贸易有限公司 | A kind of supporting construction of axle and its manufacture method |
| CN107165819A (en) * | 2017-07-12 | 2017-09-15 | 安徽理工大学 | The cylinder sleeve friction pair of horizontal colliery high-pressure high-flow Water Hydraulic Pump based on micro forming |
| CN107429848A (en) * | 2015-03-11 | 2017-12-01 | 伊格尔工业股份有限公司 | Slide unit |
| CN108869473A (en) * | 2018-06-20 | 2018-11-23 | 西安交通大学 | A kind of texturing interference joint face group design method |
-
2019
- 2019-06-13 CN CN201910509183.2A patent/CN110273921A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3386783A (en) * | 1964-05-02 | 1968-06-04 | Schmidt Gmbh Karl | Anti-friction bearing |
| EP1231393A1 (en) * | 2001-02-09 | 2002-08-14 | Nissan Motor Co., Ltd. | Low friction sliding element for a reciprocating engine |
| US20040228554A1 (en) * | 2003-05-15 | 2004-11-18 | Daido Metal Company Ltd. | Sliding member |
| KR20060121343A (en) * | 2005-05-24 | 2006-11-29 | 노병후 | Externally pressurized journal bearings with different supply holes |
| CN103211666A (en) * | 2013-04-25 | 2013-07-24 | 南京理工大学 | Artificial joint bearing surface micro-hole texture capable of improving lubricating performance and abrasion-resistant performance |
| WO2015041048A1 (en) * | 2013-09-18 | 2015-03-26 | イーグル工業株式会社 | Sliding component |
| CN103527632B (en) * | 2013-09-27 | 2017-03-01 | 昆山欣海韵贸易有限公司 | A kind of supporting construction of axle and its manufacture method |
| CN107429848A (en) * | 2015-03-11 | 2017-12-01 | 伊格尔工业股份有限公司 | Slide unit |
| CN107165819A (en) * | 2017-07-12 | 2017-09-15 | 安徽理工大学 | The cylinder sleeve friction pair of horizontal colliery high-pressure high-flow Water Hydraulic Pump based on micro forming |
| CN108869473A (en) * | 2018-06-20 | 2018-11-23 | 西安交通大学 | A kind of texturing interference joint face group design method |
Non-Patent Citations (1)
| Title |
|---|
| 马晨波等: "椭圆形截面织构的最优参数设计模型", <中南大学学报（自然科学版）> * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111822733A (en) * | 2020-06-30 | 2020-10-27 | 天津大学 | Dynamic and static pressure sliding ceramic main shaft device |
| CN111828480A (en) * | 2020-06-30 | 2020-10-27 | 天津大学 | Anti-impact sliding main shaft device |
| CN111822733B (en) * | 2020-06-30 | 2022-12-06 | 天津大学 | Dynamic and static pressure sliding ceramic main shaft device |
| CN115013437A (en) * | 2022-06-29 | 2022-09-06 | 中国地质大学（北京） | Long-life ultralow-friction solid lubrication sliding bearing assembly for spacecraft |
| CN116181803A (en) * | 2023-03-08 | 2023-05-30 | 西南石油大学 | Bearing bush gradient surface texture for improving lubricating capacity of sliding bearing of fracturing pump |
| CN116181803B (en) * | 2023-03-08 | 2023-09-22 | 西南石油大学 | Bearing bush gradient surface texture for improving lubricating capacity of sliding bearing of fracturing pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110273921A (en) | A kind of full working scope composite construction sliding bearing | |
| CN106649982B (en) | Method for calculating friction torque of large-cone-angle conical main bearing of wind driven generator | |
| CN102748390B (en) | Hydrodynamic axial bearing | |
| CN102606618B (en) | Novel energy-saving tilting-pad thrust slide bearing | |
| CN110230638A (en) | A kind of full working scope composite construction sliding axle | |
| CN109915477A (en) | A kind of multi stage resilient support component and kinetic pressure gas transverse bearing | |
| CN111188832A (en) | Energy efficiency type tapered roller bearing | |
| CN101413541A (en) | Internal groove self-lubricating dynamic-static pressure coupling air-float bearing | |
| CN201347963Y (en) | Bidirectional thrust conical roller bearing | |
| CN109869327A (en) | A kind of centrifugal compressor using quiet dynamic pressure mixed gas thrust bearing | |
| CN101413540A (en) | Kinetic pressure air-float bearing of inner flow passage self-lubricating structure | |
| CN110219878A (en) | A kind of full working scope compound friction auxiliary structure | |
| CN109710964A (en) | A kind of milling train radial oil film bearing design method | |
| CN206386383U (en) | It is segmented rubber tilting thrust bearing | |
| CN109578431A (en) | The design method of surface micro-moulding in a kind of hydrodynamic combination bearing and bearing | |
| CN110094430A (en) | A kind of part needle-type heavy-duty universal section | |
| CN109764057A (en) | A kind of multi stage resilient supporting mechanism and kinetic pressure gas thrust bearing | |
| CN105179462B (en) | A kind of ripple foil-type air hydrodynamic bearing | |
| WO2021109581A1 (en) | Ball retainer and angular contact ball bearing | |
| CN201106631Y (en) | Dynamical pressure air bearing of interval channel self-lubricating structure | |
| CN201851497U (en) | Novel self-aligning type double-row cylindrical roller bearing | |
| CN206636698U (en) | A kind of return plate with dimple structure | |
| Bassani | Lubricated hybrid journal bearings | |
| CN111853052A (en) | Wear-resistant tapered roller bearing | |
| CN106763195B (en) | A kind of elasticity tilting bush sliding bearing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190924 |