CN205553850U - High governing system of bumper shock absorber - Google Patents
High governing system of bumper shock absorber Download PDFInfo
- Publication number
- CN205553850U CN205553850U CN201620395448.2U CN201620395448U CN205553850U CN 205553850 U CN205553850 U CN 205553850U CN 201620395448 U CN201620395448 U CN 201620395448U CN 205553850 U CN205553850 U CN 205553850U
- Authority
- CN
- China
- Prior art keywords
- damper cylinder
- outer damper
- amortisseur
- cylinder
- connecting piece
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a shock -absorption device field especially relates to a high governing system of bumper shock absorber. Including bumper shock absorber, chassiss height adjusting device and the wheel connection spare, the bumper shock absorber includes outer shock attenuation jar, internal damping jar and main spring, and the outer wall of shock attenuation jar sets up one section external screw thread outside, chassiss height adjusting device includes connected to the frame spare, accommodate motor, spool gear, outer shock attenuation jar ring gear and bears the weight of the bearing, the fixed suit of connected to the frame spare is outside in outer shock attenuation jar, and the spool gear setting is in the inner chamber of connected to the frame spare to rotate with connected to the frame spare and be connected, the inner circle of outer shock attenuation jar ring gear and the matching the external screw of outer shock attenuation jar, and the outer gear engagement of spool gear and outer shock attenuation jar ring gear bear the weight of the bearing cover and establish shock attenuation jar outside, and the main spring will bear the weight of the lower surface of bearing butt in outer shock attenuation jar ring gear, the lower extreme fixed connection of the wheel connection spare and internal damping jar. This system can adjust the relative distance between wheel and the frame according to the loading capacity of frame, makes the automobile body remain throughout steadily.
Description
Technical field
This utility model relates to shock-absorption device field, particularly relates to a kind of amortisseur height adjusting system.
Background technology
In order to make the vibration of vehicle frame and vehicle body decay rapidly, improve ride comfort and the comfortableness of running car,
Being typically equipped with amortisseur on automobile suspension system, widely used on automobile is that two-way function cartridge type subtracts
Shake device.
Suspension system produces vibration owing to flexible member is hit, for improving vehicle running smoothness,
Suspension is installed in parallel amortisseur with flexible member, for decay vibration, automobile suspension system uses and subtracts
Shake device and be mostly hydraulic shock absorber, its operation principle be when between vehicle frame (or vehicle body) and vehicle bridge vibrated go out
During existing relative motion, the piston in amortisseur moves up and down, the fluid in snubber cavity the most repeatedly from
One chamber flows into another intracavity through different holes.The now friction between hole wall and fluid and fluid
Intermolecular internal friction forms damping force to vibration, makes automobile vibrational energy be converted into fluid heat energy, then
It is dispersed in air by absorber.Oil passage cross section and etc. factor constant time, damping force with
Speed of related movement increase and decrease between vehicle frame and vehicle bridge (or wheel), and relevant with oil viscosity.
Amortisseur and flexible member carry the task of buffer and vibration damping, and damping force is excessive, will make to hang
Frame elasticity degenerates, and even makes amortisseur connector damage.Because of face flexible member to be regulated and amortisseur this
One contradiction.
When vehicle load, amortisseur and flexible member bear load simultaneously so that vehicle frame and wheel it
Between distance reduce, i.e. vehicle chassis reduce.And along with the reduction of vehicle chassis, vehicle by energy
Power will be deteriorated, comfortableness when simultaneously also can reduce by bus.Especially when vehicle load imbalance,
Can cause body sway, potential safety hazard increases.
Utility model content
The purpose of this utility model is to provide a kind of amortisseur height adjusting system, it is possible to according to
The loading condition of vehicle, the difference in height between regulation vehicle frame and wheel, make each amortisseur remain at
Poised state.
The amortisseur height adjusting system that this utility model provides, including amortisseur, height of chassis above ground regulation
Device and wheel connector；
Described amortisseur includes outer damper cylinder and the internal damping cylinder being mutually socketed, and be set in described outside
Main spring outside damper cylinder and described internal damping cylinder；Described outer damper cylinder is above, described in subtract
Shake cylinder is positioned at lower section, and arranges one section of outer damper cylinder external screw thread at the outer wall of described outer damper cylinder；
Described height of chassis above ground adjusting means include frame connecting piece, height of chassis above ground regulation motor, spool gear,
Outer damper cylinder gear ring and loading bearing；Described frame connecting piece is one to be set in outside described outer damper cylinder
Sleeve, and described frame connecting piece is affixed with described outer damper cylinder；Described spool gear subtracts outside described
The bearing of trend of shake cylinder is arranged in the inner chamber of described frame connecting piece, and turns with described frame connecting piece
Being dynamically connected, the outfan of described height of chassis above ground regulation motor is connected with the rotating shaft of described spool gear；
The inner ring of described outer damper cylinder gear ring coordinates with described outer damper cylinder external screw thread, and described spool gear
Engage with the external gear of described outer damper cylinder gear ring, make described outer damper cylinder gear ring nibble with described spool gear
Close while rotating, it is possible to along axially moving along a straight line of described outer damper cylinder；Described loading bearing set
It is located at outside described outer damper cylinder, and the lower surface of the upper end of described main spring and described loading bearing supports
Connect, the upper surface of described loading bearing is connected to the lower surface of described outer damper cylinder gear ring；
Described wheel connector is fixing with the lower end of described internal damping cylinder to be connected.
In alternative of the present utility model, the affixed upper lift ring in upper end of described outer damper cylinder, institute
Stating the affixed lower lift ring in lower end of internal damping cylinder, described wheel connector passes through described lower lift ring with described
Internal damping cylinder is fixing to be connected.
In alternative of the present utility model, described frame connecting piece also sets up at least one with
The through hole that described outer damper cylinder is parallel；It is arranged through the guide post of described through hole, and described guide post
Lower end is fixed with described wheel connector, and the upper end of described guide post is freely, high to limit described vehicle frame
Horizontally rotating of degree adjusting means.
In alternative of the present utility model, the upper end of described guide post arranges limited block, prevents from leading
Depart from from through hole to bar.
In alternative of the present utility model, described amortisseur height adjusting system also includes company
Extension bar；One end of described upper connecting rod is fixing with described upper lift ring to be connected, the other end and car body or vehicle frame
Fixing connection.
In alternative of the present utility model, described amortisseur height adjusting system also includes ripple
Set；In described amortisseur and described height of chassis above ground adjusting means are wrapped in by described radiation fins, described
The end of frame connecting piece is stretched out from described radiation fins.
In alternative of the present utility model, described radiation fins includes radiation fins and lower radiation fins；
The upper end of described upper radiation fins is tightly connected with the upper end of described outer damper cylinder, under described upper radiation fins
The upper surface with described frame connecting piece is held to be tightly connected；The upper surface of described lower radiation fins and described car
The lower surface of frame connector is tightly connected, under the lower surface of described lower radiation fins and described internal damping cylinder
End is tightly connected.
In alternative of the present utility model, the inner ring of described upper lift ring and described lower lift ring sets respectively
Put a rubber sleeve.
The beneficial effects of the utility model are:
The amortisseur height adjusting system that this utility model provides, it is possible to according to load and the distribution of vehicle body,
Automatically adjust the amortisseur at each wheel relative to the height between vehicle frame, make vehicle body remain at water
Level state, it is possible to increase stationarity during driving, it is also possible to improve comfortableness when taking.
Meanwhile, underbody can be maintained at suitable height with the gap on ground, it is ensured that leading to of vehicle
The property crossed.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model detailed description of the invention or technical side of the prior art
Case, will make simply the accompanying drawing used required in detailed description of the invention or description of the prior art below
Introduce, it should be apparent that, the accompanying drawing in describing below is embodiments more of the present utility model, right
From the point of view of those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to
These accompanying drawings obtain other accompanying drawing.
The structural representation of the amortisseur arrangement for adjusting height that Fig. 1 provides for this utility model embodiment；
Reference:
101-internal damping cylinder；The outer damper cylinder of 102-；
The outer damper cylinder external screw thread of 103-；104-main spring；
105-upper lift ring；106-lower lift ring；
201-frame connecting piece；202-height of chassis above ground regulation motor；
203-spool gear；The outer damper cylinder gear ring of 204-；
205-loading bearing；206-through hole；
301-upper connecting rod；302-wheel connector；
303-guide post；The upper radiation fins of 401-；
Radiation fins under 402-.
Detailed description of the invention
Below in conjunction with accompanying drawing, the technical solution of the utility model is clearly and completely described, aobvious
So, described embodiment is a part of embodiment of this utility model rather than whole embodiments.
Based on the embodiment in this utility model, those of ordinary skill in the art are not making creative work
The every other embodiment obtained under premise, broadly falls into the scope of this utility model protection.
In description of the present utility model, it should be noted that term " " center ", " on ", D score,
Orientation or the position relationship of the instruction such as "left", "right", " vertically ", " level ", " interior ", " outward " are base
In orientation shown in the drawings or position relationship, it is for only for ease of description this utility model and simplification is retouched
State rather than indicate or imply that the device of indication or element must have specific orientation, with specifically
Azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.Additionally, term " the
One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or imply relatively heavy
The property wanted.
In description of the present utility model, it should be noted that unless otherwise clearly defined and limited,
Term " is installed ", " being connected ", " connection " should be interpreted broadly, and connects, also for example, it may be fixing
Can be to removably connect, or be integrally connected；Can be to be mechanically connected, it is also possible to be electrical connection；
Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two element internals
Connection.For the ordinary skill in the art, can understand that above-mentioned term is at this with concrete condition
Concrete meaning in utility model.
The amortisseur height adjusting system that this utility model provides, is mainly used in automobile shock, including subtracting
Shake device, height of chassis above ground adjusting means and wheel connector；
Described amortisseur includes outer damper cylinder and the internal damping cylinder being mutually socketed, and be set in described outside
Main spring outside damper cylinder and described internal damping cylinder；Described outer damper cylinder is above, described in subtract
Shake cylinder is positioned at lower section, and the outer wall of damper cylinder outside arranges one section of outer damper cylinder external screw thread；
Described height of chassis above ground adjusting means include frame connecting piece, height of chassis above ground regulation motor, spool gear,
Outer damper cylinder gear ring and loading bearing；Described frame connecting piece is one to be set in outside described outer damper cylinder
Sleeve, and described frame connecting piece is affixed with described outer damper cylinder；Described spool gear subtracts outside described
The bearing of trend of shake cylinder is arranged in the inner chamber of described frame connecting piece, and turns with described frame connecting piece
Being dynamically connected, the outfan of described height of chassis above ground regulation motor is connected with the rotating shaft of described spool gear；
The inner ring of described outer damper cylinder gear ring coordinates with described outer damper cylinder external screw thread, and described spool gear
Engage with the external gear of described outer damper cylinder gear ring, make described outer damper cylinder gear ring nibble with described spool gear
Close while rotating, it is possible to along axially moving along a straight line of described outer damper cylinder；Described loading bearing set
It is located at outside described outer damper cylinder, and the lower surface of the upper end of described main spring and described loading bearing supports
Connect, the upper surface of described loading bearing is connected to the lower surface of described outer damper cylinder gear ring；
Described wheel connector is fixing with the lower end of described internal damping cylinder to be connected.
This amortisseur height adjusting system can adjust each car automatically according to the load of vehicle body and distribution
Amortisseur at wheel, relative to the height between vehicle frame, makes vehicle body remain at level, it is possible to carry
Stationarity during high driving, it is also possible to improve comfortableness when taking.
Meanwhile, underbody can be maintained at suitable height with the gap on ground, it is ensured that leading to of vehicle
The property crossed.
Below by a specific embodiment, this utility model is done specific description.
The structural representation of the amortisseur arrangement for adjusting height that Fig. 1 provides for this utility model embodiment.
As it is shown in figure 1, this amortisseur arrangement for adjusting height includes amortisseur, wheel connector and vehicle frame
Height adjusting system.
This amortisseur includes outer damper cylinder 102 and the internal damping cylinder 101 being mutually socketed, and is set in
Main spring 104 outside described outer damper cylinder 102 and described internal damping cylinder 101；Described outer damper cylinder
102 is above, and described internal damping cylinder 101 is positioned at lower section, and the outer wall of damper cylinder 102 outside sets
Put one section of outer damper cylinder external screw thread 103.It is additionally provided with baffle ring in the lower end of internal damping cylinder 101, is used for
Abut described main spring 104.
Described height of chassis above ground adjusting means include frame connecting piece 201, height of chassis above ground regulation motor 202,
Spool gear 203, outer damper cylinder gear ring 204 and loading bearing 205.
Described frame connecting piece 201 is a tube-in-tube structure being set in outside described outer damper cylinder 102,
And described frame connecting piece 201 is affixed with described outer damper cylinder 102；Described spool gear 203 is along described
The bearing of trend of outer damper cylinder 102 is arranged in the inner chamber of described frame connecting piece 201, and described
Use between rotating shaft and the described frame connecting piece 201 of spool gear 203 and be rotationally connected.Described vehicle frame is high
Degree regulation motor 202 is arranged in described frame connecting piece 201, and described height of chassis above ground regulation motor
The outfan of 202 is connected with the rotating shaft of described spool gear 203, it is possible to drive described spool gear 203 to revolve
Turn.
The inner ring of described outer damper cylinder gear ring 204 is horizontal female thread, spiral shell outer with described outer damper cylinder
Stricture of vagina 103 coordinates, and described spool gear 203 engages with the external gear of described outer damper cylinder gear ring 204,
While making described outer damper cylinder gear ring 204 and described spool gear 203 engagement rotation, it is possible to along described
Axially moving along a straight line of outer damper cylinder 102；Described loading bearing 205 is set in described outer damper cylinder
The outside of 102, and the upper end of described main spring 104 abuts with the lower surface of described loading bearing 205,
Thus the upper surface of described loading bearing 205 is connected to the following table of described outer damper cylinder gear ring 204
Face.
At the affixed upper lift ring 105 in the upper end of described outer damper cylinder 102, described internal damping cylinder 101
The affixed lower lift ring 106 in lower end.One end of described wheel connector 302 is solid with described lower lift ring 106
Fixed connection, the other end is connected with wheel；Upper connecting rod 301 is set, makes one end of upper connecting rod 301
Affixed with vehicle frame or vehicle body, the other end is affixed with upper lift ring 105.
Described frame connecting piece 201 also sets up a through hole parallel with described outer damper cylinder 102
206, and it is arranged through the guide post 303 of described through hole 206, and the lower end of described guide post 303
Fixing with described wheel connector 302, the upper end of described guide post 303 is free, to limit described car
Horizontally rotating of frame arrangement for adjusting height.
A limited block is also set up, to limit frame connecting piece 201 in the upper end of described guide post 303
Movement position, and prevent guide post 303 from departing from from through hole 206.
(such as increasing heavy burden) when there being external load to be applied on car body, frame connecting piece 201 will
Driving outer damper cylinder 102 to move downward, compress main spring 104, now, automobile chassis will be depressed,
Handling capacity and deterioration of safety.
When frame connecting piece 201 changes with the relative position of wheel connector 302, vehicle frame is high
Degree regulation motor 202 drives spool gear 203 and outer damper cylinder gear ring 204 to rotate, outer damper cylinder gear ring
204 move downward along the sidewall of outer damper cylinder 102, further compression main spring 104, simultaneously will outward
Damper cylinder 102 and frame connecting piece 201 jack-up, make frame connecting piece 201 and wheel connector 302
Between difference in height be returned to original state, thus ensure the height of vehicle body.After external load disappears,
Height of chassis above ground regulation motor 202 drives spool gear 203 and damping outer shell gear ring 204 to rotate backward, and subtracts
Shake outer shell 102 and frame connecting piece 201 decline, and make frame connecting piece 201 and wheel connector 302
Between difference in height be still maintained at original state.
In preferred version of the present utility model, it is additionally provided with radiation fins 401 and lower radiation fins 402；
The upper end of described upper radiation fins 401 is tightly connected with the upper end of described outer damper cylinder 102, described upper ripple
The lower end of stricture of vagina set 401 is tightly connected with the upper surface of described frame connecting piece 201；Described lower radiation fins
The upper surface of 402 is tightly connected with the lower surface of described frame connecting piece 201, described lower radiation fins 402
The lower end of lower surface and described internal damping cylinder 101 be tightly connected.
Described upper radiation fins 401 and lower radiation fins 402 can be by described amortisseur and described height of chassis above ground
In adjusting means is wrapped in, water proof and dust proof, it is also possible to avoid foreign body to enter.
In preferred version of the present utility model, described upper lift ring 105 and described lower lift ring 106 interior
Circle is respectively provided with a rubber sleeve, plays the effect of damping and buffering.
To sum up, this damping balance system can adjust vehicle frame relative to wheel automatically according to the load of vehicle body
The height of axle, makes vehicle body remain at the plateau of certain altitude, improves comfortableness when taking,
It also is able to make vehicle remain at a good form under steam.
It is last it is noted that various embodiments above is only in order to illustrate the technical solution of the utility model,
It is not intended to limit；Although this utility model being described in detail with reference to foregoing embodiments,
It will be understood by those within the art that: it still can be to the skill described in foregoing embodiments
Art scheme is modified, or the most some or all of technical characteristic is carried out equivalent；And this
A little amendments or replacement, do not make the essence of appropriate technical solution depart from this utility model each embodiment skill
The scope of art scheme.
Claims (8)
1. an amortisseur height adjusting system, it is characterised in that include amortisseur, height of chassis above ground
Adjusting means and wheel connector；
Described amortisseur includes outer damper cylinder and the internal damping cylinder being mutually socketed, and be set in described outside
Main spring outside damper cylinder and described internal damping cylinder；Described outer damper cylinder is above, described in subtract
Shake cylinder is positioned at lower section, and arranges one section of outer damper cylinder external screw thread at the outer wall of described outer damper cylinder；
Described height of chassis above ground adjusting means include frame connecting piece, height of chassis above ground regulation motor, spool gear,
Outer damper cylinder gear ring and loading bearing；Described frame connecting piece is one to be set in outside described outer damper cylinder
Sleeve, and described frame connecting piece is affixed with described outer damper cylinder；Described spool gear subtracts outside described
The bearing of trend of shake cylinder is arranged in the inner chamber of described frame connecting piece, and turns with described frame connecting piece
Being dynamically connected, the outfan of described height of chassis above ground regulation motor is connected with the rotating shaft of described spool gear；
The inner ring of described outer damper cylinder gear ring coordinates with described outer damper cylinder external screw thread, and described spool gear
Engage with the external gear of described outer damper cylinder gear ring, make described outer damper cylinder gear ring nibble with described spool gear
Close while rotating, it is possible to along axially moving along a straight line of described outer damper cylinder；Described loading bearing set
It is located at outside described outer damper cylinder, and the lower surface of the upper end of described main spring and described loading bearing supports
Connect, the upper surface of described loading bearing is connected to the lower surface of described outer damper cylinder gear ring；
Described wheel connector is fixing with the lower end of described internal damping cylinder to be connected.
Amortisseur height adjusting system the most according to claim 1, it is characterised in that described
The affixed upper lift ring in upper end of outer damper cylinder, the affixed lower lift ring in lower end of described internal damping cylinder, described
Wheel connector is connected by described lower lift ring and described internal damping cylinder are fixing.
Amortisseur height adjusting system the most according to claim 2, it is characterised in that in institute
State and in frame connecting piece, also set up at least one through hole parallel with described outer damper cylinder；It is arranged through institute
State the guide post of through hole, and the lower end of described guide post is fixed with described wheel connector, described guiding
The upper end of bar is freely.
Amortisseur height adjusting system the most according to claim 3, it is characterised in that described
The upper end of guide post arranges limited block.
Amortisseur height adjusting system the most according to claim 2, it is characterised in that also wrap
Include upper connecting rod；One end of described upper connecting rod is fixing with described upper lift ring to be connected, the other end and car body
Or the fixing connection of vehicle frame.
Amortisseur height adjusting system the most according to claim 1, it is characterised in that also wrap
Include radiation fins；Described amortisseur and described height of chassis above ground adjusting means are wrapped in by described radiation fins
In, the end of described frame connecting piece is stretched out from described radiation fins.
Amortisseur height adjusting system the most according to claim 6, it is characterised in that described
Radiation fins includes radiation fins and lower radiation fins；The upper end of described upper radiation fins and described outer damper cylinder
Upper end is tightly connected, and the lower end of described upper radiation fins seals even with the upper surface of described frame connecting piece
Connect；The upper surface of described lower radiation fins is tightly connected with the lower surface of described frame connecting piece, described under
The lower surface of radiation fins is tightly connected with the lower end of described internal damping cylinder.
Amortisseur height adjusting system the most according to claim 2, it is characterised in that described
The inner ring of upper lift ring and described lower lift ring is respectively provided with a rubber sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620395448.2U CN205553850U (en) | 2016-05-05 | 2016-05-05 | High governing system of bumper shock absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620395448.2U CN205553850U (en) | 2016-05-05 | 2016-05-05 | High governing system of bumper shock absorber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205553850U true CN205553850U (en) | 2016-09-07 |
Family
ID=56805980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620395448.2U Expired - Fee Related CN205553850U (en) | 2016-05-05 | 2016-05-05 | High governing system of bumper shock absorber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205553850U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106515346A (en) * | 2016-12-26 | 2017-03-22 | 芜湖哈特机器人产业技术研究院有限公司 | Suspension fork structure of transfer car |
| CN107415619A (en) * | 2017-04-20 | 2017-12-01 | 北京汽车股份有限公司 | Damper, damper method for adjusting height and automobile |
| CN108284909A (en) * | 2017-12-25 | 2018-07-17 | 平湖市好佳儿车业有限公司 | A kind of perambulator |
| CN108995497A (en) * | 2017-06-07 | 2018-12-14 | 大众汽车有限公司 | For automobile-wheel suspension assembly plate spring device |
| CN110505967A (en) * | 2017-04-28 | 2019-11-26 | 舍弗勒技术股份两合公司 | For carrying out the transmission device of the actuator equipment of height adjustment to vehicle body |
-
2016
- 2016-05-05 CN CN201620395448.2U patent/CN205553850U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106515346A (en) * | 2016-12-26 | 2017-03-22 | 芜湖哈特机器人产业技术研究院有限公司 | Suspension fork structure of transfer car |
| CN107415619A (en) * | 2017-04-20 | 2017-12-01 | 北京汽车股份有限公司 | Damper, damper method for adjusting height and automobile |
| CN107415619B (en) * | 2017-04-20 | 2019-11-26 | 北京汽车股份有限公司 | Damper, damper method for adjusting height and automobile |
| CN110505967A (en) * | 2017-04-28 | 2019-11-26 | 舍弗勒技术股份两合公司 | For carrying out the transmission device of the actuator equipment of height adjustment to vehicle body |
| CN110505967B (en) * | 2017-04-28 | 2023-05-05 | 舍弗勒技术股份两合公司 | Transmission device for actuator device for adjusting height of vehicle body |
| CN108995497A (en) * | 2017-06-07 | 2018-12-14 | 大众汽车有限公司 | For automobile-wheel suspension assembly plate spring device |
| CN108284909A (en) * | 2017-12-25 | 2018-07-17 | 平湖市好佳儿车业有限公司 | A kind of perambulator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160907 Termination date: 20180505 |
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| CF01 | Termination of patent right due to non-payment of annual fee |