CN207111732U - A kind of bearing block with lubricating oil cooling and oil-leakage-prevention - Google Patents
A kind of bearing block with lubricating oil cooling and oil-leakage-prevention Download PDFInfo
- Publication number
- CN207111732U CN207111732U CN201721074746.2U CN201721074746U CN207111732U CN 207111732 U CN207111732 U CN 207111732U CN 201721074746 U CN201721074746 U CN 201721074746U CN 207111732 U CN207111732 U CN 207111732U
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- China
- Prior art keywords
- oil
- oleophobic
- bearing
- collar
- bearing housing
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- 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.)
- Withdrawn - After Issue
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Abstract
The utility model discloses a kind of bearing block with lubricating oil cooling and oil-leakage-prevention, including bearing housing.Pedestal collar is provided with bearing housing.Pedestal collar is used to install and fix bearing.The tank wall of bearing housing is provided with axis hole.Oleophobic collar bush is provided with axis hole.One end that oleophobic collar bush is located in bearing housing is provided with oil baffle ring.Oil baffle ring is annular plate body.The external diameter of oil baffle ring is more than the diameter of axis hole.The outer wall of oleophobic collar bush is provided with the W shape oleophobic grooves of annular.Axis hole is provided with first oil guide groove of the opening towards axle center.First oil guide groove is in a ring.W shape oleophobic grooves face the first oil guide groove, and are enclosed in by the cell wall of the first oil guide groove both sides in the range of the first Oil Guide channel opening.Oil spilling room is provided between bearing housing tank wall and pedestal collar provided with axis hole.Oil Guide road is provided between the bottom and oil spilling room of first oil guide groove.The top of bearing housing is provided with fuel feed hole.Fuel feed hole is located at the top of pedestal collar.The bottom of oil spilling room is provided with oil outlet.
Description
Technical field
It the utility model is related to bearing block.
Background technology
The bearing of rotation usually requires to be cooled down at a high speed, and a kind of type of cooling is to be circulated by the cooling of lubricating oil to axle
Bearing is cooled down.In the prior art, for by the cooling bearing of lubricating oil, generally to bearing block closure designs, and it is anti-with this
Only lubricating oil does not flow out bearing block.But hydronic lubricating oil needs high-pressure oil pump that the lubricating oil after cooling is pumped into bearing block
It is interior, high pressure conditions are in the bearing block of sealing, under the high pressure conditions of bearing block, lubricating oil passes through line shaft and bearing seat-box
Gap between body is easy to flow out outside bearing block.Therefore, in the prior art, circulated by the cooling of lubricating oil to bearing block
Under the mode cooled down, the also no oil-proof of outflow of lubrication oil bearing block is prevented by the sealing to bearing block.
The content of the invention
Problem to be solved in the utility model：Asked in the cooling circulation of lubricating oil because oil leak occurs in the high pressure of bearing block
Topic.
To solve the above problems, the scheme that the utility model uses is as follows：
A kind of bearing block with lubricating oil cooling and oil-leakage-prevention, including bearing housing；Pedestal collar is provided with the bearing housing；
The pedestal collar is rounded, for installing and fixing bearing；The tank wall of bearing housing is provided with axis hole；Axis hole is rounded, its axle
The heart and the axle center of the pedestal collar coincide；Oleophobic collar bush is provided with axis hole；Oleophobic collar bush is enclosed in axis hole；Oleophobic axle
Ring set is in circle ring column structure, and its axle center and the axle center of the pedestal collar coincide, and the diameter of its external diameter and axis hole matches,
The diameter of its internal diameter and line shaft matches；One end that oleophobic collar bush is located in the bearing housing is provided with oil baffle ring；Gear oil
Plate ring is annular plate body；The external diameter of oil baffle ring is more than the diameter of axis hole；The outer wall of oleophobic collar bush is provided with the W shapes of annular
Oleophobic groove；Axis hole is provided with first oil guide groove of the opening towards axle center；First oil guide groove is in a ring；W shape oleophobic grooves face
One oil guide groove, and be enclosed in by the cell wall of the first oil guide groove both sides in the range of the first Oil Guide channel opening；Bearing housing provided with axis hole
Oil spilling room is provided between tank wall and the pedestal collar；Oil Guide road is provided between the bottom and oil spilling room of first oil guide groove；It is described
The top of bearing housing is provided with fuel feed hole；Fuel feed hole is located at the top of the pedestal collar；The bottom of oil spilling room is provided with oil outlet.
Further, oleophobic collar bush, which is located on the inside of the annulus of one end in the bearing housing, is provided with the first oleophobic groove；First
Oleophobic groove is in a ring.
Further, the oil baffle ring of oleophobic collar bush is provided with second oleophobic groove of the opening towards outside；Second oleophobic groove
In a ring, the diameter of its internal diameter and axis hole matches.
Further, axle center of the bearing housing along axis hole is cut into bearing housing bottom and bearing box cover up and down；The bearing
Case is fastened by bearing housing bottom and bearing box cover and formed.
Further, axis hole has two；The axis coinciding of two axis holes；Oleophobic collar bush is mounted in two axis holes；Institute
The both ends for stating pedestal collar are respectively equipped with two oil spilling rooms；Two oil spilling rooms are interconnected.
Further, bearing is installed in the pedestal collar；The external annulus of bearing are provided with the profit oil groove of annular；Fuel feed hole
Inner side connection profit oil groove.
Further, the both ends of the pedestal collar are provided with the second oil guide groove of annular.
Further, the external annulus of oil baffle ring are provided with wedge angle ring body.
Technique effect of the present utility model is as follows：The utility model is a kind of oil-leakage-prevention design based on the mode of dredging, and
The non-traditional oil-leakage-prevention design realized by way of sealing.Bearing housing and extraneous no sealing part, but pass through oleophobic axle
Design is dredged in gap between ring set and bearing box body, the lubricating oil flowed to by gap outside bearing box body is passed through each
Kind cell body design is dredged to oil spilling room.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the utility model embodiment.
Fig. 2 is the utility model embodiment along the dimensional structure diagram after the vertical cutting in axle center.
Fig. 3 is the utility model embodiment along the cutting plane view after the vertical cutting in axle center.
Fig. 4 is that the utility model embodiment is mutually connected part along the oleophobic collar bush after the vertical cutting in axle center with bearing housing bottom
Enlarged drawing.
Fig. 5 is the oleophobic collar bush dimensional structure diagram of the utility model embodiment.
Fig. 6 is the oleophobic collar bush of the utility model embodiment along the cutting plane view after the cutting of axle center.
Fig. 7 is the dimensional structure diagram at the utility model embodiment bearing housing bottom.
Fig. 8 is the utility model embodiment bearing housing bottom along the dimensional structure diagram after the vertical cutting in axle center.
Fig. 9 is the dimensional structure diagram of the utility model embodiment bearing box cover.
Figure 10 is the dimensional structure diagram of the utility model embodiment bearing.
Embodiment
The utility model is described in further details below in conjunction with the accompanying drawings.
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10, a kind of cooling of band lubricating oil and leakproof
The bearing block of oil, including bearing housing bottom 1, bearing box cover 2, oleophobic collar bush 3 and bearing 5.Bearing housing bottom 1 and bearing box cover 2 are logical
Cross after screw is fastened and form bearing housing.The both ends of bearing housing are respectively equipped with axis hole 4.Oleophobic collar bush 3 is in axis hole 4.Two
The corresponding two oleophobic collar bushes 3 of individual axis hole 4.The axle center of two axis holes 4 coincides.Pedestal collar is provided with bearing housing.Bearing bracket stand
Ring is rounded, and pedestal collar is used to install and fixing bearing 5, and its axle center and the axle center of two axis holes 4 coincide.Bearing 5 is installed
In pedestal collar.
The axle center of axis hole 4 is horizontal.Bearing housing bottom 1 and bearing box cover 2 are by the horizontal upper incision in axle center of the bearing housing along axis hole 4
It is divided into.Lower section for bearing housing bottom 1, top is for bearing box cover 2.Bearing housing bottom 1, as shown in Figure 7, Figure 8, including semicircle
Pedestal collar bottom 13 and two semicircle axis holes.Bearing box cover 2, as shown in figure 9, including semicircle bearing bracket stand ring cowling 23 and two
Semicircle axis hole.After bearing housing bottom 1 and bearing box cover 2 are fastened, semicircle pedestal collar bottom 13 and semicircle bearing bracket stand ring cowling
23 collectively constitute the pedestal collar of circle.Two semicircles on two semicircle axis holes and bearing box cover 2 on bearing housing bottom 1
Axis hole collectively constitutes two two circular axis holes 4.Bearing housing bottom 1 is provided with the tank wall of semicircle axis hole and semicircle bearing bracket stand
Oil spilling chamber 12 is provided between ring bottom 13.The both ends at semicircle pedestal collar bottom 13 are respectively equipped with two oil spilling chambers 12.Two oil spillings
The bottom of chamber 12 is interconnected.Bearing box cover 2 is provided between the tank wall of semicircle axis hole and semicircle bearing bracket stand ring cowling 23 and set
There is cavity 22.The both ends of semicircle bearing bracket stand ring cowling 23 are respectively equipped with two cavitys 22.Two oil spilling chambers 12 and two cavitys 22
It is corresponding respectively, form two oil spilling rooms.That is, it is provided with oil spilling between bearing housing tank wall and pedestal collar provided with axis hole
Room.The both ends of pedestal collar are respectively equipped with two oil spilling rooms.The bottom of two oil spilling chambers 12 is interconnected, and also implies that, two
Oil spilling room bottom is interconnected.One of them is provided with oil outlet 11 for two oil spilling chambers 12, also implies that, the bottom of oil spilling room is provided with
Oil outlet 11.Bearing box cover 2 is provided with fuel feed hole 21.Fuel feed hole 21 is located at the top of semicircle bearing bracket stand ring cowling 23, also means
, fuel feed hole 21 is located at the top of pedestal collar.For specifically, as shown in Figure 10, the bearing 5 in pedestal collar
External annulus be provided with annular profit oil groove 51.Profit oil groove 51 connects with Bearing inner.The inner side connection profit oil groove of fuel feed hole 21
51.In addition, bearing box cover 2 is provided with the lifting hole(eyelet) 29 being easily installed.Bearing housing bottom 1 is provided with for fixed screw hole.
The semicircle axis hole at bearing housing bottom 1 is provided with opening towards the first oil guide groove bottom 14 of the semi-circular shape in axle center.The
The bottom at one oil guide groove bottom 14 is provided with the Oil Guide road 15 connected with oil spilling chamber 12.The semicircle axis hole of bearing box cover 2 is provided with and opened
First Oil Guide groove lid 24 of the mouth towards the semi-circular shape in axle center.First oil guide groove bottom 14 and the first Oil Guide groove lid 24 match, altogether
With the first oil guide groove of composition.That is, axis hole is provided with first oil guide groove of the opening towards axle center.First oil guide groove is in ring
Shape.The Oil Guide road 15 being communicated between the bottom and oil spilling room of first oil guide groove.Oil Guide road 15 is located at the inwall at bearing housing bottom 1
On.
The both ends at semicircle pedestal collar bottom 13 are circumferentially provided with the second oil guide groove bottom 131 of semi-circular shape.Half
The both ends of circular shaft bolster ring cowling 23 are circumferentially provided with the second Oil Guide groove lid 231 of semi-circular shape.Second oil guide groove bottom
131 and second Oil Guide groove lid 231 match, collectively constitute annular the second oil guide groove.It is, the both ends of pedestal collar are provided with
Second oil guide groove of annular.Second oil guide groove is 45 degree of trimmings of annular at the both ends of pedestal collar, and thus, the second oil guide groove is natural
Connect the oil spilling room at pedestal collar both ends.
Oleophobic collar bush 3, as shown in Figure 5, Figure 6, including ring set body and oil baffle ring 32.The ring set of oleophobic collar bush 3
Body is in circle ring column structure, and the axle center of its axle center and pedestal collar coincides, and the diameter of its external diameter and axis hole 4 matches, its
The diameter of internal diameter and line shaft matches.Because the axle center of pedestal collar and the axle center of axis hole 4 coincide, therefore, oleophobic collar
The ring set body axle center and the axle center of axis hole 4 of set 3 coincide.The outer wall of ring set body is provided with the W shape oleophobics groove 34 of annular.W
Shape oleophobic groove 34 is the cell body that section is in " W " shape.Oil baffle ring 32 is located at one end of ring set body, toroidal, its internal diameter with
Ring set body is identical, and its external diameter is more than the diameter of axis hole 4.Ring set body is provided with the inside of one end annulus of oil baffle ring 32 and is provided with platform
The first oleophobic of annular groove 31 of stepwise.Oil baffle ring 32 has a certain thickness, and oil baffle ring 32 is towards being provided with oil baffle ring 32
The other end be provided with annular the second oleophobic groove 33.The diameter of the internal diameter and axis hole 4 of second oleophobic groove 33 matches, and in other words
The internal diameter of two oleophobic grooves 33 is identical with the external diameter of ring set body.
Oleophobic collar bush 3 is arranged on the structure on the axis hole 4 of bearing housing, as shown in Figure 2, Figure 3, Figure 4.Oleophobic collar bush 3
It is enclosed in axis hole 4.Oil baffle ring 32 on oleophobic collar bush 3 is located in the casing of bearing housing, and is stuck on the inwall of bearing housing.
Blow-by between oil baffle ring 32 and the inwall of bearing housing.W shape oleophobics groove 34 on oleophobic collar bush 3 faces the first Oil Guide
Groove, that is, W shape oleophobic grooves face the first Oil Guide groove lid 24 and the first oil guide groove bottom 14 respectively about 34.W shape oleophobics groove 34
Width is less than the width of the first oil guide groove so that W shape oleophobics groove 34 is enclosed in the first oil guide groove by the cell wall of the first oil guide groove both sides
In the range of opening.Second oleophobic groove 33 is towards outside.Because Oil Guide road 15 is the connection that is opened up on the inwall at bearing housing bottom 1
One oil guide groove and the passage of oil spilling room, the bottom of the second oleophobic groove 33 is towards Oil Guide road 15.Therefore, Oil Guide road 15 not only connects
One oil guide groove, the second oleophobic groove 33 is also connected.
The operation principle of the present embodiment is as follows：When bearing block is installed, line shaft passes through the circular channel in oleophobic collar bush 3
Into in the casing of bearing housing, it is connected with bearing 5.That is, oleophobic collar bush 3 is enclosed on outside line shaft.Bearing block work
When making, the lubricating oil after cooling is entered by fuel feed hole 21 in the casing of bearing housing, and enters axle by the profit oil groove 51 on bearing 5
Hold and bearing 5 is lubricated and cooled down inside 5.The lubricating oil that profit oil groove 51 overflows flows into oil spilling room naturally through the second oil guide groove.
Lubricating oil in bearing 5 naturally also flows into oil spilling room after overflowing.The lubricating oil that the bearing 5 of rotation throws away or spilt at a high speed, is dredged
Bearing chamber interior wall and oil baffle ring 32 on oily collar bush 3 are stopped.A large amount of lubricating oil on bearing chamber interior wall are through oleophobic collar
Gap between the oil baffle ring 32 and bearing chamber interior wall of set 3 is flowed to outside bearing housing.By in oil baffle ring 32 and bearing housing
Gap between wall flows to elicitation effect of the lubricating oil first through the second oleophobic groove 33 outside bearing housing, is dredged to second and dredged
In oil groove 33, oil spilling room is then flowed into by the Oil Guide road 15 between oil baffle ring 32 and bearing chamber interior wall.Second oleophobic groove 33
Interior lubricating oil has and can pass through gap between oleophobic collar bush 3 and axis hole 4 on a small quantity and flow to outside bearing housing.Through oleophobic collar bush
Gap between 3 and axis hole 4 flows to lubricating oil outside bearing housing due to the elicitation effect of W shape oleophobics groove 34, W shape oleophobics groove 34
Interior lubricating oil can be imported in the first oil guide groove by the effect on pinnacle among W shapes.Lubricating oil in first oil guide groove is through Oil Guide
Road 15 flows into oil spilling room.Plate face of the lubricating oil that oil baffle ring 32 is stopped along oil baffle ring 32 is finally flowed into and overflow to flowing down
Grease chamber, but also there is a small amount of lubricating oil to be flowed to through the gap between oleophobic collar bush 3 and line shaft outside bearing housing.But due to
The elicitation effect of one oleophobic groove 31, the lubricating oil quilt outside bearing housing is flowed to through the gap between oleophobic collar bush 3 and line shaft
Dredge to the first oleophobic groove 31, and bearing housing can not be flowed out.The plate face through oil baffle ring 32 is last certainly in first oleophobic groove 31
So flow into oil spilling room.Lubricating oil in oil spilling room is now the condition of high temperature, is led to the lubricating oil of high temperature in oil spilling room by oil pump
Cross outside the outflow bearing housing of oil outlet 11 and cooled down, the lubricating oil after cooling is pumped into bearing housing through fuel feed hole 21 by oil pump again.
From above-mentioned operation principle, the utility model is a kind of oil-leakage-prevention design based on the mode of dredging, and non-traditional
The oil-leakage-prevention design realized by way of sealing.From above-mentioned operation principle, bearing housing and extraneous no sealing part, and
It is that design is dredged by gap between oleophobic collar bush 3 and bearing box body, will be flowed to by gap outside bearing box body
Lubricating oil by various cell bodies design dredge to oil spilling room.
In addition it should be pointed out that due to the high speed turning effort of bearing 5, compared to the lubricating oil on bearing chamber interior wall
For, the lubricating oil that oil baffle ring 32 is stopped will be far less than the lubricating oil on bearing chamber interior wall.In addition, in the present embodiment,
Oil pressure at fuel feed hole 21 is in high pressure conditions.But because oil spilling room by gap due to being in communication with the outside, oil spilling room is originally in
In atmospheric pressure state.And in fact, due to adding oleophobic collar bush 3 between line shaft and the axis hole of bearing housing, therefore, bearing housing
It also is difficult to seal.Also therefore, pressure differential is mainly reflected between fuel feed hole 21 and oil spilling room.Pressure between oil spilling room and the external world
Poor very little.Also therefore, compared to oleophobic collar bush 3 and bearing chamber interior wall labyrinth, the first oleophobic groove on oleophobic collar bush 3
31 are enough dredged the lubricating oil flowed to through the gap between oleophobic collar bush 3 and line shaft outside bearing housing to first
In oleophobic groove 31.If oil spilling chamber pressure is larger, then the first oleophobic groove 31 is not enough to through between oleophobic collar bush 3 and line shaft
Gap flows to the lubricating oil outside bearing housing.
In addition, to cause the lubricating oil on oil baffle ring 32 to flow into faster in oil spilling room.The external annulus of oil baffle ring 32
It is provided with wedge angle ring body 321.The section of wedge angle ring body 321 is the ring body of wedge angle.
Claims (8)
1. a kind of bearing block with lubricating oil cooling and oil-leakage-prevention, including bearing housing；Pedestal collar is provided with the bearing housing；Institute
It is rounded to state pedestal collar, for installing and fixing bearing (5)；The tank wall of bearing housing is provided with axis hole (4)；Axis hole (4) is in circle
Shape, its axle center and the axle center of the pedestal collar coincide；It is characterized in that；Oleophobic collar bush (3) is provided with axis hole (4)；Dredge
Oily collar bush (3) is enclosed in axis hole (4)；Oleophobic collar bush (3) is in circle ring column structure, its axle center and the axle of the pedestal collar
The heart coincides, and its external diameter and the diameter of axis hole (4) match, and the diameter of its internal diameter and line shaft matches；Oleophobic collar bush (3)
One end in the bearing housing is provided with oil baffle ring (32)；Oil baffle ring (32) is annular plate body；Oil baffle ring (32)
External diameter be more than axis hole (4) diameter；The outer wall of oleophobic collar bush (3) is provided with the W shape oleophobic grooves (34) of annular；Axis hole (4)
It is provided with first oil guide groove of the opening towards axle center；First oil guide groove is in a ring；W shape oleophobic grooves (34) face the first Oil Guide
Groove, and be enclosed in by the cell wall of the first oil guide groove both sides in the range of the first Oil Guide channel opening；Bearing housing tank wall provided with axis hole (4)
Oil spilling room is provided between the pedestal collar；Oil Guide road (15) are provided between the bottom and oil spilling room of first oil guide groove；It is described
The top of bearing housing is provided with fuel feed hole (21)；Fuel feed hole (21) is located at the top of the pedestal collar；The bottom of oil spilling room is provided with
Oil outlet (11).
2. the bearing block with lubricating oil cooling and oil-leakage-prevention as claimed in claim 1, it is characterised in that oleophobic collar bush (3)
The first oleophobic groove (31) is provided with the inside of the annulus of one end in the bearing housing；First oleophobic groove (31) is in a ring.
3. the bearing block with lubricating oil cooling and oil-leakage-prevention as claimed in claim 1, it is characterised in that oleophobic collar bush (3)
Oil baffle ring (32) be provided with second oleophobic groove (33) of the opening towards outside；Second oleophobic groove (33) in a ring, its internal diameter
Match with the diameter of axis hole (4).
4. as claimed in claim 1 with lubricating oil cooling and oil-leakage-prevention bearing block, it is characterised in that the bearing housing along
The axle center of axis hole (4) is cut into bearing housing bottom (1) and bearing box cover (2) up and down；The bearing housing is by bearing housing bottom (1) and bearing
Case lid (2), which is fastened, to be formed.
5. the bearing block with lubricating oil cooling and oil-leakage-prevention as claimed in claim 1, it is characterised in that axis hole (4) has two；
The axis coinciding of two axis holes (4)；Oleophobic collar bush (3) is mounted in two axis holes (4)；The both ends of the pedestal collar point
She You not two oil spilling rooms；Two oil spilling rooms are interconnected.
6. the bearing block with lubricating oil cooling and oil-leakage-prevention as claimed in claim 1, it is characterised in that in the pedestal collar
Bearing (5) is installed；The external annulus of bearing (5) are provided with the profit oil groove (51) of annular；The inner side connection profit oil of fuel feed hole (21)
Groove (51).
7. the bearing block with lubricating oil cooling and oil-leakage-prevention as claimed in claim 1, it is characterised in that the pedestal collar
Both ends are provided with the second oil guide groove of annular.
8. the bearing block with lubricating oil cooling and oil-leakage-prevention as claimed in claim 1, it is characterised in that oil baffle ring (32)
External annulus are provided with wedge angle ring body (321).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721074746.2U CN207111732U (en) | 2017-08-25 | 2017-08-25 | A kind of bearing block with lubricating oil cooling and oil-leakage-prevention |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721074746.2U CN207111732U (en) | 2017-08-25 | 2017-08-25 | A kind of bearing block with lubricating oil cooling and oil-leakage-prevention |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207111732U true CN207111732U (en) | 2018-03-16 |
Family
ID=61577669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721074746.2U Withdrawn - After Issue CN207111732U (en) | 2017-08-25 | 2017-08-25 | A kind of bearing block with lubricating oil cooling and oil-leakage-prevention |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207111732U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107314038A (en) * | 2017-08-25 | 2017-11-03 | 江苏海特尔机械有限公司 | A kind of bearing block cooled down with lubricating oil with oil-leakage-prevention |
-
2017
- 2017-08-25 CN CN201721074746.2U patent/CN207111732U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107314038A (en) * | 2017-08-25 | 2017-11-03 | 江苏海特尔机械有限公司 | A kind of bearing block cooled down with lubricating oil with oil-leakage-prevention |
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Legal Events
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180316 Effective date of abandoning: 20221209 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180316 Effective date of abandoning: 20221209 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |