CN203645461U - Electric eddy current brake used for heavy-type mining dump vehicle - Google Patents
Electric eddy current brake used for heavy-type mining dump vehicle Download PDFInfo
- Publication number
- CN203645461U CN203645461U CN201320830804.5U CN201320830804U CN203645461U CN 203645461 U CN203645461 U CN 203645461U CN 201320830804 U CN201320830804 U CN 201320830804U CN 203645461 U CN203645461 U CN 203645461U
- Authority
- CN
- China
- Prior art keywords
- eddy current
- current brake
- electric eddy
- rotor
- resolver
- 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.)
- Withdrawn - After Issue
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Abstract
The utility model provides an electric eddy current brake used for a heavy-type mining dump vehicle. The electric eddy current brake is installed between an automobile internal combustion engine and a gearbox. The rotor of the electric eddy current brake is an excitation member. An induction ring is fixed on a flywheel casing and a cooling water channel is arranged between the induction ring and the flywheel casing. An excitation current is obtained from the electric eddy current brake through a rotary transformer stator, a rotary transformer rotor and a rotating rectifier or an electric brush and a collecting ring. Because the rotor of the electric eddy current brake installed between the engine and the gearbox, when the gearbox is in a low gear during downhill, even if the driving speed is low, the engine still has a high rotating speed, and therefore the light and small electric eddy current brake can generate a braking torque which is big enough, and usage of mechanical brake is decreased furthest.
Description
Technical field
The utility model belongs to the contactless braking technology of automobile field, is specifically related to a kind of electric eddy current brake for heavy mining truck.
Background technology
Heavy mining truck often has in the process of moving a long period and travels on the road of continuous descending, driver need step on and brake always, cause the too high and premature failure of brake bush temperature rise, thereby cause the generation of accident, the mine car accident causing because of brake failure according to statistics accounts for the over half of mine car accident.The best approach of head it off is exactly to be in operation to use the mode of braking of non-friction, avoids as far as possible or reduce the use wearing and tearing of mechanical brake friction plate.For example, the heavy self-dumping car of super-huge electric transmission more than 100t, what in the time of descending, adopt is dynamic brake, absorbs the kinetic energy power generation of vehicle when the descending by motor, is then converted the energy into and is dissipated the heat in air by air-cooled resistor; Passenger's comfort when public transport big bus is braked in order to improve in addition; conventionally can between automobile drive axle and gearbox, install " current vortex retarder "; realize mild contactless braking by electromagnetic induction principle, but this device because excitation completes on stator, rotor is inductor; wind-cooling heat dissipating; add that working speed is lower, its volume and quality are larger, and braking power is less continuously; can not meet the braking needs of the long-time descending of heavy mining truck, therefore be necessary to propose to improve.
Utility model content
The technical problem that the utility model solves: a kind of electric eddy current brake for heavy mining truck is provided, adopt current vortex braking principle the electric eddy current brake rotor of variable magnetic field intensity to be arranged between the internal combustion engine and decelerator of rotation, inductance loop is fixed on bell housing, and inductance loop is forced cooling by the cooling water of internal combustion engine, take away in time the heat producing because of eddy current braking, provide long high-power braking as vehicle.
The technical solution adopted in the utility model: for the electric eddy current brake of heavy mining truck, described electric eddy current brake is arranged between car combustion engine and gearbox, electric eddy current brake rotor is field element, inductance loop is fixed on bell housing and is provided with cooling water channel between the two, obtains exciting current by resolver stator, resolver rotor and rotating rectifier or brush and collector ring from electric eddy current brake.
Further, described electric eddy current brake is arranged on clutch front end or the rear end between car combustion engine and gearbox.
One of preferred version, the exciting current of described electric eddy current brake rotor is provided by brush and collector ring by electric eddy current brake, and described brush axially or is radially placed, and the electric current of electric eddy current brake output is adjustable DC electricity.
Two of preferred version, described electric eddy current brake comprises electric eddy current brake rotor, resolver rotor, resolver stator, rotating rectifier and inductance loop, described inductance loop is arranged on the bell housing inner chamber wall being fixed on vehicle body and leaves cooling water channel between the two, described electric eddy current brake rotor is arranged in the shaft shoulder I of the flywheel being fixed on car combustion engine output shaft and is corresponding with inductance loop, described resolver rotor is arranged in the shaft shoulder II of flywheel, described resolver stator is arranged in bell housing and between resolver rotor and resolver stator and leaves air gap, when brake, electric eddy current brake applies the resolver rotor that high-frequency alternating current makes two ends be connected with rotating rectifier input and induces respective electrical kinetic potential at resolver stator two ends, described rotating rectifier output is connected with electric eddy current brake rotor, cause the inductance loop corresponding with electric eddy current brake rotor to produce induced current and electric eddy current brake rotor is produced to the brake torque contrary with its direction of rotation, described rotating rectifier is arranged on flywheel.
Further, described electric eddy current brake rotor comprises eddy-current brake rotor core and around eddy-current brake rotor excitation coil thereon; Described resolver rotor comprises resolver rotary magnetic core and around resolver rotary inductive coil thereon; Described resolver stator comprises the static magnetic core of resolver and around resolver static excitation coil thereon.
Further, described inductance loop and cooling water channel contact side are shaped with many cooling fins, and the recirculated cooling water of internal combustion engine forces cooling by cooling water channel to inductance loop.
Described electric eddy current brake rotor is salient-pole structure or the hidden pole type structure that adopts low remanent magnetism soft magnetic material to make; Described inductance loop adopts magnetic conduction, conduction, heat conduction, and all pure iron, mild steel or copper-iron alloy material are made preferably; The iron core of described resolver stator and resolver rotor is ferrocart core, soft magnetic ferrite or solidifies and form with the radial lamination of U-shaped silicon steel sheet annular potting resin; Described rotating rectifier adopts the SiC diode that can adapt to engine flywheel position higher temperature.
Or described electric eddy current brake rotor is the concentrated winding claw-pole structure that one group of employing or the low remanent magnetism soft magnetic material of array are made; The iron core of described resolver stator and resolver rotor is ferrocart core or solidifies and form with the radial lamination of U-shaped silicon steel sheet annular potting resin; Described rotating rectifier adopts the SiC diode that can adapt to engine flywheel position higher temperature.
Further, the outermost of described eddy-current brake rotor excitation coil is wound with the high strength reinforcement such as glass fibre belt or aramid belt material.
The utility model is compared with prior art because eddy-current brake rotor is arranged between engine and gearbox, in the time of descending, gearbox hangs over low or first gear, even if the very low engine shaft of travel speed still has higher rotating speed, thereby make the electric eddy current brake of finite volume can produce enough large brake torque, farthest reduce the use of mechanical brake;
If electric eddy current brake rotor is arranged on gearbox one axle of clutch rear end, driver's operation can be carried out routinely; If electric eddy current brake rotor is arranged on the flywheel of clutch front end, when driver operates routinely, likely there will be flame-out, for fear of engine misses, a sensitive switch also should be installed on clutch pedal, when depressing after clutch pedal, electric eddy current brake should stop providing exciting current to eddy-current brake immediately.
Accompanying drawing explanation
Fig. 1 is the utility model the first example structure schematic diagram;
Fig. 2 is the utility model the second example structure schematic diagram.
Embodiment
Below in conjunction with accompanying drawing 1,2, embodiment of the present utility model is described.
In order to express easily, following embodiment is all arranged on the flywheel 13 of clutch front end by eddy-current brake rotor 14, actual design can be arranged on eddy-current brake rotor 14 on gearbox one axle of clutch rear end while manufacture, also vortex induction ring 10 can be arranged on the housing or special independent case of gearbox.
For the electric eddy current brake of heavy mining truck, described electric eddy current brake is arranged between car combustion engine and gearbox, and specifically, described electric eddy current brake is arranged on clutch front end or the rear end between car combustion engine and gearbox.Electric eddy current brake rotor 14 is field element, inductance loop 10 is fixed on bell housing 11 and is provided with cooling water channel 12 between the two, specifically, described inductance loop 10 is shaped with many cooling fins 19 with cooling water channel 12 contact sides, and the recirculated cooling water of internal combustion engine forces cooling by cooling water channel 12 to inductance loop 10.Obtain exciting current by resolver stator 16, resolver rotor 15 and rotating rectifier 7 or brush and collector ring from electric eddy current brake.
One of preferred version, the exciting current of described electric eddy current brake rotor 14 is provided by brush and collector ring by electric eddy current brake, and described brush axially or is radially placed, and the electric current of electric eddy current brake output is adjustable DC electricity.
Two of preferred version, above-mentioned electric eddy current brake comprises electric eddy current brake rotor 14, resolver rotor 15, resolver stator 16, rotating rectifier 7 and inductance loop 10, described inductance loop 10 is arranged on the bell housing 11 inner chamber walls that are fixed on vehicle body and leaves cooling water channel 12 between the two, described electric eddy current brake rotor 14 is arranged in the shaft shoulder I 17 of the flywheel 13 being fixed on car combustion engine output shaft 1 and is corresponding with inductance loop 10, in accompanying drawing 1-2, label 2 is connecting bolt, described resolver rotor 15 is arranged in the shaft shoulder II 18 of flywheel 13, described resolver stator 16 is arranged in bell housing 11 and between resolver rotor 15 and resolver stator 16 and leaves air gap, when brake, electric eddy current brake applies high-frequency alternating current and makes two ends induce respective electrical kinetic potential with the resolver rotor 15 that rotating rectifier 7 inputs are connected at resolver stator 16 two ends, described rotating rectifier 7 outputs are connected with electric eddy current brake rotor 14, cause the inductance loop corresponding with electric eddy current brake rotor 14 10 to produce induced current electric eddy current brake rotor 14 is produced to the torque braking contrary with its direction of rotation, described rotating rectifier 7 is arranged on flywheel 13.Above-mentioned electric eddy current brake rotor 14 comprises eddy-current brake rotor core 9 and around eddy-current brake rotor excitation coil 8 thereon; Described resolver rotor 15 comprises resolver rotary magnetic core 3 and around resolver revolving coil 4 thereon; Described resolver stator 16 comprises the static magnetic core 5 of resolver and around resolver stationary coil 6 thereon.The outermost of described eddy-current brake rotor excitation coil 8 is wound with glass fibre belt or aramid belt high strength reinforcement material.
Salient-pole structure or the hidden pole type structure of above-mentioned electric eddy current brake rotor 14 for adopting low remanent magnetism soft magnetic material to make; Or electric eddy current brake rotor 14 is the concentrated winding claw-pole structure that one group of employing or the low remanent magnetism soft magnetic material of array are made; Described inductance loop 10 adopts magnetic conduction, conduction, heat conduction, and all pure iron, mild steel or copper-iron alloy material are made preferably; The iron core of described resolver stator 16 and resolver rotor 15 is ferrocart core, soft magnetic ferrite or solidifies and form with the radial lamination of U-shaped silicon steel sheet annular potting resin; Described rotating rectifier 7 adopts the SiC diode that can adapt to engine flywheel position higher temperature.
As one of optimal way, between described resolver rotor 15 and resolver stator 16, leave radial air gap as shown in Figure 1; As two of optimal way, between described resolver rotor 15 and resolver stator 16, leave axial air-gap as shown in Figure 2; Also can be the breath of tilting.
Operation principle: be regulation speed in the time of the continuous descending of vehicle, first answer gearbox to hang over low or first gear, then gently touch on the brake, at this moment eddy current braking controller will apply according to the angle of brake pedal the high-frequency alternating current of certain voltage at the two ends of resolver stationary coil 6.By magnetic Field Coupling, resolver revolving coil 4 will induce respective electrical kinetic potential, the two ends of resolver revolving coil 4 are connected to the input of rotating rectifier 7, the output of rotating rectifier 7 is connected with eddy-current brake rotor excitation coil 8, thereby make the magnetic pole of rotor produce the magnetic field of rotation, adjacent inductance loop 10 will produce induced current and also claim eddy current, this eddy current can produce a torque contrary with direction of rotation to rotor, the form that inductance loop 10 can generate heat to 10 works of inductance loop rotor 9 by eddy current resistance simultaneously all changes into heat, recirculated cooling water by internal combustion engine forces cooling by cooling water channel 12 to inductance loop 10, take away in time the heat producing because of eddy current braking.In order to strengthen inductance loop 10 heat-sinking capabilities, between the outside of inductance loop 10 and bell housing 11, a cooling water channel 12 should be set, and should process many cooling fins 19 in the outside of inductance loop 10, to increase the area of heat exchange.In this example, electric eddy current brake rotor 14 adopts Lundell structure, and its benefit is simple in structure, and moderate strength is easily manufactured.Iron core can use the casting such as mild steel or ferroaluminium; Coil is that winding is concentrated in moulding, and the outermost of coil can be done to reinforce with glass fibre belt or aramid belt and is wound around, the powerful centrifugal force running into when resisting High Rotation Speed.
A sensitive switch is installed on the brake pedal of automobile and can be reflected that pedal is operated the angular transducer of the degree of depth, when depressing after brake pedal, first sensitive switch action, start electric eddy current brake, electric eddy current brake sends corresponding exciting current electricity according to the signal of angular transducer subsequently, and the exciting current size of sending is directly proportional to pedal angle substantially.This sensitive switch can be common contact sensitive switch, can be also the approach switch of Hall switch or other type; Angular transducer can be the transducer by potentiometer, linear Hall or other form.The generally control for eddy current braking by the first half section of the whole strokes of pedal, the second half section is for the control of mechanical brake.
For the higher engine of rotating speed, should adopt aforesaid way, but cost is higher; For the lower high output diesel engine of rotating speed, rotor excitation current transmits relatively simple by collector ring and brush.
Above-described embodiment, is preferred embodiment of the present utility model, is not used for limiting the utility model practical range, and the equivalence of being done with content described in the utility model claim therefore all changes, within all should being included in the utility model claim scope.
Claims (7)
1. for the electric eddy current brake of heavy mining truck, it is characterized in that: described electric eddy current brake is arranged between car combustion engine and gearbox, electric eddy current brake rotor (14) is field element, it is upper and be provided with cooling water channel (12) between the two that inductance loop (10) is fixed on bell housing (11), obtains exciting current by resolver stator (16), resolver rotor (15) and rotating rectifier (7) or brush and collector ring from electric eddy current brake; described electric eddy current brake comprises electric eddy current brake rotor (14), resolver rotor (15), resolver stator (16), rotating rectifier (7) and inductance loop (10), described inductance loop (10) is arranged on bell housing (11) the inner chamber wall being fixed on vehicle body and leaves cooling water channel (12) between the two, it is upper and corresponding with inductance loop (10) that described electric eddy current brake rotor (14) is arranged on the shaft shoulder I (17) of the flywheel (13) being fixed on car combustion engine output shaft (1), described resolver rotor (15) is arranged in the shaft shoulder II (18) of flywheel (13), described resolver stator (16) is arranged in bell housing (11) and between resolver rotor (15) and resolver stator (16) and leaves air gap, when brake, electric eddy current brake applies high-frequency alternating current and makes two ends induce respective electrical kinetic potential with the resolver rotor (15) that rotating rectifier (7) input is connected at resolver stator (16) two ends, described rotating rectifier (7) output is connected with electric eddy current brake rotor (14), cause the inductance loop (10) corresponding with electric eddy current brake rotor (14) to produce induced current and electric eddy current brake rotor (14) is produced to the brake torque contrary with its direction of rotation, described rotating rectifier (7) is arranged on flywheel (13).
2. the electric eddy current brake for heavy mining truck according to claim 1, is characterized in that: described electric eddy current brake is arranged on clutch front end or the rear end between car combustion engine and gearbox.
3. the electric eddy current brake for heavy mining truck according to claim 1 and 2, is characterized in that: described electric eddy current brake rotor (14) comprises eddy-current brake rotor core (9) and around eddy-current brake rotor excitation coil (8) thereon; Described resolver rotor (15) comprises resolver rotary magnetic core (3) and around resolver rotary inductive coil (4) thereon; Described resolver stator (16) comprises the static magnetic core of resolver (5) and around resolver static excitation coil (6) thereon.
4. the electric eddy current brake for heavy mining truck according to claim 1 and 2, it is characterized in that: described inductance loop (10) is shaped with many cooling fins (19) with cooling water channel (12) contact side, and the recirculated cooling water of internal combustion engine forces cooling by cooling water channel (12) to inductance loop (10).
5. the electric eddy current brake for heavy mining truck according to claim 1 and 2, it is characterized in that: salient-pole structure or the hidden pole type structure of described electric eddy current brake rotor (14) for adopting low remanent magnetism soft magnetic material to make, described inductance loop (10) adopts magnetic conduction, conduction, heat conduction, and all pure iron, mild steel or copper-iron alloy material are made preferably; The iron core of described resolver stator (16) and resolver rotor (15) is ferrocart core, soft magnetic ferrite or solidifies and form with the radial lamination of U-shaped silicon steel sheet annular potting resin; Described rotating rectifier (7) adopts the SiC diode that can adapt to engine flywheel position higher temperature.
6. the electric eddy current brake for heavy mining truck according to claim 1 and 2, is characterized in that: described electric eddy current brake rotor (14) is the concentrated winding claw-pole structure that one group of employing or the low remanent magnetism soft magnetic material of array are made; The iron core of described resolver stator (16) and resolver rotor (15) is ferrocart core, soft magnetic ferrite or solidifies and form with the radial lamination of U-shaped silicon steel sheet annular potting resin; Described rotating rectifier (7) adopts the SiC diode that can adapt to engine flywheel position higher temperature.
7. the electric eddy current brake for heavy mining truck according to claim 3, is characterized in that: the outermost of described eddy-current brake rotor excitation coil (8) is wound with glass fibre belt or aramid belt high strength reinforcement material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320830804.5U CN203645461U (en) | 2013-12-16 | 2013-12-16 | Electric eddy current brake used for heavy-type mining dump vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320830804.5U CN203645461U (en) | 2013-12-16 | 2013-12-16 | Electric eddy current brake used for heavy-type mining dump vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203645461U true CN203645461U (en) | 2014-06-11 |
Family
ID=50876681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320830804.5U Withdrawn - After Issue CN203645461U (en) | 2013-12-16 | 2013-12-16 | Electric eddy current brake used for heavy-type mining dump vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203645461U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683645A (en) * | 2013-12-16 | 2014-03-26 | 陕西通运专用汽车集团有限公司 | Eddy current brake for heavy-duty mining dump truck |
| CN108880094A (en) * | 2017-08-21 | 2018-11-23 | 北京精密机电控制设备研究所 | A kind of double circle structure suitable for moving external rotor electric machine |
-
2013
- 2013-12-16 CN CN201320830804.5U patent/CN203645461U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683645A (en) * | 2013-12-16 | 2014-03-26 | 陕西通运专用汽车集团有限公司 | Eddy current brake for heavy-duty mining dump truck |
| CN103683645B (en) * | 2013-12-16 | 2016-06-15 | 陕西通运专用汽车集团有限公司 | Electric eddy current brake for heavy mining truck |
| CN108880094A (en) * | 2017-08-21 | 2018-11-23 | 北京精密机电控制设备研究所 | A kind of double circle structure suitable for moving external rotor electric machine |
| CN108880094B (en) * | 2017-08-21 | 2019-08-09 | 北京精密机电控制设备研究所 | A kind of double circle structure suitable for moving external rotor electric machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103683645B (en) | Electric eddy current brake for heavy mining truck | |
| US9083222B2 (en) | Self-excited eddy current liquid-cooled retarder | |
| CN102594090B (en) | Liquid cooling self-excitation type eddy current retarder with salient pole structure | |
| CN105846623B (en) | A kind of electromagnetism liquid-cooled retarder of bimorph transducer twin coil | |
| US11299031B2 (en) | Wheel hub motor for electric vehicle | |
| CN106059250B (en) | A kind of embedded electromagnetism liquid-cooled retarder of rotor | |
| CN101951048A (en) | Direct-drive electric motor modulated basing on space magnetic field | |
| CN103935232A (en) | Electric wheel based on birotor motor and control method thereof | |
| CN103248195B (en) | A kind of engine flywheel integrated electromagnetic liquid-cooled retarder | |
| CN202294336U (en) | Power generation device matched with vehicle brake | |
| CN203645461U (en) | Electric eddy current brake used for heavy-type mining dump vehicle | |
| CN103904846B (en) | A kind of Hybrid Vehicle stator permanent magnetic type double-rotor machine structure | |
| CN206510767U (en) | A kind of Direct Action Type permanent-magnet eddy current wheel side retarder | |
| CN107846092A (en) | A kind of wheel hub electric motor of electric vehicle of integrated caliper | |
| CN104753310B (en) | A kind of self-excitation type retarding device and its control method | |
| CN104670184B (en) | A kind of brake gear of recyclable braking energy | |
| CN107117041B (en) | Eddy current liquid cooling retarder with electric energy recycling function | |
| CN201928133U (en) | Combined driving device for disk-type motor | |
| CN107846126B (en) | Electric car directly drives hub motor | |
| CN107294344B (en) | Engine flywheel integrated single salient pole structure hydraulic-electric retarder | |
| CN202094788U (en) | Novel eddy current brake | |
| CN201918877U (en) | Small-size, light and high-efficiency direct-driving motor | |
| CN206528352U (en) | A kind of automobile regeneration brake system | |
| CN103280944B (en) | A kind of eddy current retarder strengthening braking moment | |
| CN201570971U (en) | Electric eddy speed damper |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHAANXI TONGYUN HEAVY INDUSTRY CO., LTD. Free format text: FORMER OWNER: SHAANXI TONGYUN SPECIAL AUTOMOBILE GROUP CO., LTD. Effective date: 20140829 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140829 Address after: 722405 Shaanxi, Baoji County, Qishan Province, Caijiapo east two road on the east side Patentee after: SHAANXI TONGYUN HEAVY INDUSTRY CO., LTD. Address before: 722405, No. 1, Weibei East Road, Caijiapo Economic Development Zone, Qishan, Shaanxi, Baoji Patentee before: SHAANXI TONGYUN SPECIAL AUTOMOBILE GROUP CO., LTD. |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20140611 Effective date of abandoning: 20160615 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |