CN201659975U - Front wheel braking system of dumper for mine - Google Patents
Front wheel braking system of dumper for mine Download PDFInfo
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- CN201659975U CN201659975U CN2010201590484U CN201020159048U CN201659975U CN 201659975 U CN201659975 U CN 201659975U CN 2010201590484 U CN2010201590484 U CN 2010201590484U CN 201020159048 U CN201020159048 U CN 201020159048U CN 201659975 U CN201659975 U CN 201659975U
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Abstract
The utility model discloses a front wheel braking system of a dumper for a mine, comprising a hydraulic pump and an oil tank connected with the input end of the hydraulic pump, wherein the driving end of the hydraulic pump is connected with a power mechanism of the mining dumper; the output end of the hydraulic pump is connected with a front wheel pressure-reducing valve in a foot brake valve of the mining dumper; and the output end of the front wheel pressure-reducing valve is connected with a front wheel brake by a braking control device and a front wheel brake. The front wheel braking system is characterized in that the braking control device comprises a two-position three-way electromagnetic reversing valve and a one-way valve; and an electro-hydraulic proportional pressure-reducing valve is arranged and is connected with the one-way valve in parallel. By adding the electro-hydraulic proportional pressure-reducing valve in the braking control device, the front wheel braking system leads a front wheel braking device of the mining dumper can output different braking forces, thus meeting the requirements of different road conditions.
Description
Technical field
The utility model relates to a kind of brake system, is specifically related to a kind of quarry tipper front wheel brake system.
Background technology
Quarry tipper is mining transport trolley, belongs to one of mining equipment, is mainly used in the transportation of ore and other bulk cargo in mine.Quarry tipper is mainly by vehicle frame, be installed on parts such as operator's compartment on the vehicle frame, driving engine, change speed gear box, brake system, and wheel formed.Vehicle in the process of moving, different road surfaces can produce different friction force to wheel, thereby also just needs different braking force come this friction force of balance at glancing impact when vehicle.For travelling at the non-ground-surface quarry tipper of mating formation, its road conditions of travelling are complicated and changeable especially, and when by some special road conditions, front and back wheel maximum, force glancing impact simultaneously might cause vehicle to cross strong lack of equilibrium because of braking force.
At present, many employings front wheel brake system shown in Figure 1 of the front wheel brake system of quarry tipper, this brake system mainly comprises: actuating unit 3, Hydraulic Pump 2, foot brake valve 4, braking force control system 5, drg 6, energy storage 7 and fuel tank 1.Wherein be integrated with 9, one 2/2-way solenoid directional control valves of 8, one check valves of a two-bit triplet solenoid directional control valve 13, a direct acting pressure valve 10 in the braking force control system.Solenoid directional control valve 8 has 3 hydraulic fluid ports, when electromagnet YV1 is charged, is in the A position, this valve X mouth sealing at this moment, and Y, Z mouth communicate and lead to fuel tank; When electromagnet YV1 was not charged, by spring reset, spool was in the B position, and at this moment valve X, Z mouth are connected, the sealing of Y mouth.The solenoid directional control valve 13 of 2/2-way has 2 hydraulic fluid ports, and promptly hydraulic fluid port X, hydraulic fluid port Y when electromagnet YV3 is charged, are in the A position, and at this moment pressure oil can only flow to the X mouth from the Y mouth by this valve, but can not flow to the Y mouth from the X mouth; When electromagnet YV3 was not charged, by spring reset, spool was in the B position, and at this moment pressure oil can flow to the Y mouth from the X mouth by this valve.Direct acting pressure valve 10 has 3 hydraulic fluid ports, and X, Y are logical under the normality, and along with Y mouth place pressure changes the also corresponding adjustment of valve core opening, it is constant to keep the Y mouth pressure, Z mouth connected tank.The P1 mouth of foot brake valve 4 connects Hydraulic Pump 2; The B1 mouth, the P mouth of connection braking force control system 5.The oil circuit that P2, B2 mouth are communicated with is the part of trailing wheel brake circuit.The T mouth connects fuel tank.The PX mouth is guide's hydraulic fluid port, accepts pilot pressure oil and implements emergency braking.Wherein be built in the reducing valve 11 in the foot brake valve 4, three hydraulic fluid ports are arranged, under the state of nature, the P1 mouth of the logical foot brake valve of hydraulic fluid port X, logical Hydraulic Pump; The logical fuel tank of the T mouth of the logical foot brake valve of hydraulic fluid port Y; The P mouth of the logical braking force control system of B1 mouth of the logical foot brake valve of hydraulic fluid port Z.Be provided with emergency braking oil pocket 12 in the foot brake valve, when implementing emergency braking, implement braking from the guide oil extrusion spring that the PX mouth enters, effect is equivalent to step on the stretcher of foot brake valve.
The braking procedure of this front wheel brake device is: when dumping car drives to certain road surface, the chaufeur opening installation is electrical control gear such as rocker switch in operator's compartment, at this moment electromagnet YV3 is charged, be in the A position, step on the pedal of foot brake valve when chaufeur and implement glancing impact, pass through the X mouth of reducing valve 11 from the pressure oil of Hydraulic Pump, the Z mouth, pass through the X mouth of solenoid directional control valve 8 again, the Z mouth, run into the reverse of check valve 9, at this moment two two energising magnetic change-over valve 13 interior check valves also are in reverse, pressure oil has only the X mouth through direct acting pressure valve 10, the Y mouth, the brake repair room of arrival drg 6, the piston that promotes drg is implemented braking.When braking finishes when unclamping the foot brake valve, the pressure oil of brake repair room through check valve 9, passes through Z mouth, the X mouth of solenoid directional control valve 8 again under the effect of brake spring, is pushed back fuel tank through Z mouth, the Y mouth of the reducing valve 11 in the foot brake valve, thus brake off.
Yet, there is following deficiency in above-mentioned this front wheel brake device: quarry tipper is at glancing impact, the braking force that provides to front-wheel brake has only two states, it or not the pre-set braking force of reducing valve 11 in the foot brake valve, be integrated in the braking force that reducing valve 10 is preset in the braking force control system exactly, these two kinds of braking forces all can not satisfy the different demands of different road conditions to quarry tipper front wheel brake power.
Summary of the invention
The utility model purpose provides a kind of quarry tipper front wheel brake system, by the improvement to structure, makes the front wheel brake system of quarry tipper can export different braking forces, satisfies the demand of different road conditions.
For achieving the above object, the technical solution adopted in the utility model is: a kind of quarry tipper front wheel brake system, comprise that a Hydraulic Pump reaches and Hydraulic Pump input end bonded assembly fuel tank, described hydraulic pump drive end is connected with the actuating unit of quarry tipper, front-wheel reducing valve in the foot brake valve of described hydraulic pressure delivery side of pump and quarry tipper is connected, the mouth of described front-wheel reducing valve is connected with front-wheel brake through braking force control system, described braking force control system comprises the solenoid directional control valve and the check valve of a two-bit triplet, the electro-hydraulic proportional reducing valve that is provided with in parallel with described check valve.
In the technique scheme, described Hydraulic Pump is the core apparatus of brake system, it is the propulsion source of whole brake system, drive by actuating unit (electrical motor or driving engine or transmission gearbox), its effect is the pressure energy that the mechanical energy of driving engine or transmission gearbox or electrical motor is converted to liquid, provides power to total system.Fuel tank is the container of storage hydraulic oil.The foot brake valve is the operated device of car brakeing, by two independently reducing valve form, respectively front-wheel and trailing wheel output hydraulic oil is implemented braking.The brake piston separating wheel that resets when front-wheel brake and rear wheel brake do not have pressure oil and apply, wheel can roll, and obtains to promote the brake piston brake wheel behind the pressure oil.Described solenoid directional control valve is a two-bit triplet, and three hydraulic fluid ports are arranged, and when electromagnet YV1 is charged, is in the A position, the X mouth of this valve sealing at this moment, and Y, Z mouth communicate and lead to fuel tank; When electromagnet YV1 was not charged, by spring reset, spool was in the B position, and at this moment this valve X, Z mouth are connected, the sealing of Y mouth.Electro-hydraulic proportional reducing valve has three hydraulic fluid ports, and wherein the X mouth is an oil inlet, and when the proportion electro-magnet YV2 of electro-hydraulic proportional reducing valve was not charged, this valve X, Z mouth were connected fully; When YV2 was charged, X, Z mouth opening changed, and along with the difference of YV2 carried charge, openings of sizes is also inequality, and its delivery pressure is with the proportional output of carried charge; Because built-in action of the spring, valve X, Z mouth are connected all the time, the logical all the time fuel tank of the Y mouth of proportional pressure-reducing valve.
Further technical scheme is connected with described front-wheel reducing valve and also is provided with energy storage.Energy storage is as the back-up power source of car side brake, for wheel braking provides power.
Principle of work of the present utility model: when quarry tipper is implemented glancing impact, drive Hydraulic Pump by actuating unit, the Hydraulic Pump running is with in the hydraulic oil input pin brake activation valve, through the front-wheel reducing valve in the foot brake valve hydraulic oil is imported solenoid directional control valve, again by solenoid directional control valve input electro-hydraulic proportional reducing valve, electro-hydraulic proportional reducing valve is given front-wheel brake according to preestablishing output with the matched hydraulic oil of road conditions demand, thereby implements front wheel brake as required.
Because the technique scheme utilization, the advantage that the utility model compared with prior art has is:
1, since the utility model by braking force control system is set, in braking force control system, be connected with a two-bit triplet solenoid directional control valve and a check valve, an electro-hydraulic proportional reducing valve in parallel with described check valve, make the front wheel brake system of quarry tipper can export different braking forces, satisfy the demand of different road conditions;
2, the utility model need not existing front wheel brake device is carried out large-scale redevelopment, is fit to promote the use of;
3. the utility model is simple in structure, controls conveniently, and is easy to realize.
Description of drawings
Fig. 1 is a front wheel brake device schematic diagram in the prior art;
Fig. 2 is a front wheel brake device schematic diagram among the utility model embodiment one.
Wherein: 1, fuel tank; 2, Hydraulic Pump; 3, actuating unit; 4, foot brake valve; 5, braking force control system; 6, front-wheel brake; 7, energy storage; 8, two-bit triplet solenoid directional control valve; 9, check valve; 10, direct acting pressure valve; 11, reducing valve; 12, emergency braking oil pocket; 13,2/2-way solenoid directional control valve; 21, fuel tank; 22, Hydraulic Pump; 23, actuating unit; 24, foot brake valve; 25, braking force control system; 26, front-wheel brake; 27, energy storage; 28, two-bit triplet solenoid directional control valve; 29, check valve; 30, electro-hydraulic proportional reducing valve; 31, reducing valve; 32, emergency braking oil pocket.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further described:
Embodiment one: referring to shown in Figure 2, a kind of quarry tipper front wheel brake system, comprise that a Hydraulic Pump 22 reaches and Hydraulic Pump 22 input end bonded assembly fuel tanks 21, described Hydraulic Pump 22 drive ends are connected with the actuating unit 23 of quarry tipper, front-wheel reducing valve 31 in the foot brake valve 24 of the mouth of described Hydraulic Pump 22 and quarry tipper is connected, be connected with described front-wheel reducing valve 31 and also be provided with energy storage 27, the mouth of described front-wheel reducing valve 31 is connected with front-wheel brake 26 through braking force control system 25, described braking force control system 25 comprises the solenoid directional control valve 28 and the check valve 29 of a two-bit triplet, with described check valve 29 electro-hydraulic proportional reducing valves 30 that are provided with in parallel.
Referring to Fig. 2, the B1 mouth of the P mouth connecting pin brake activation valve of braking force control system is accepted the pressure that the foot brake valve is exported.The A mouth is accepted hydraulic oil and is braked the front-wheel brake of front-wheel.The T mouth connects fuel tank.The G mouth is the pressure test point.Solenoid directional control valve has three hydraulic fluid ports, and wherein the P mouth of the logical braking force control system of X mouth that is to say the pressure oil of acceptance from the B1 mouth output of foot brake valve; The Y mouth of solenoid directional control valve communicates with the T mouth of braking force control system and leads to fuel tank; The Z mouth of solenoid directional control valve is communicated with the X mouth of check valve and the X mouth of electro-hydraulic proportional reducing valve simultaneously.The Y mouth of check valve communicates with the A mouth of braking force control system, promptly also communicates with front-wheel brake.Electro-hydraulic proportional reducing valve has three hydraulic fluid ports, and wherein the X mouth can be accepted the pressure oil from the Z mouth of solenoid directional control valve 28; The T mouth of the logical braking force control system of the Y mouth of electro-hydraulic proportional reducing valve and logical fuel tank; The Z mouth of electro-hydraulic proportional reducing valve leads to the A mouth of braking force control system and is communicated with front-wheel brake.
The P1 mouth of foot brake valve connects Hydraulic Pump.The B1 mouth, the P mouth of connection braking force control system is the part of front wheel brake oil circuit.P2, B2 mouth, the oil circuit that is communicated with is the part of trailing wheel brake circuit.The T mouth connects fuel tank.The PX mouth is guide's hydraulic fluid port, accepts first pilot oil and implements emergency braking.Wherein be built in the front-wheel reducing valve of foot brake valve, the P1 mouth of the logical foot brake valve of hydraulic fluid port X, logical check valve Y mouth can be accepted the pressure oil from Hydraulic Pump; The logical fuel tank of the T mouth of the logical foot brake valve of hydraulic fluid port Y; The P mouth of the logical braking force control system of B1 mouth of the logical foot brake valve of hydraulic fluid port Z.The trailing wheel reducing valve principle that is built in the foot brake valve is communicated with rear wheel brake with the front-wheel reducing valve.Be provided with the emergency braking oil pocket in the foot brake valve, when implementing emergency braking, the guide oil extrusion spring that enters from the PX mouth, front-wheel reducing valve, trailing wheel reducing valve X, Z mouth separately in the foot brake valve are connected, make B1, B2 mouth pressure oil output, go to implement braking, effect is equivalent to push down on the pedal.The check valve that is provided with between foot brake valve and the Hydraulic Pump, connect the energy storage that emergency braking is used thereafter, when engine off or other reason cause pressing oil sources that stable pressure oil can not be provided, by stepping on the foot brake valve, the hydraulic oil that energy storage stores is done emergency brake usefulness by the braking force control system input brake.
Working process of the present utility model:
When vehicle in the middle of driving process, the electromagnet YV1 on the solenoid directional control valve is an electriferous state not, at this moment change-over valve is in the work of B position, its internal oil passages X, Z connect, Y mouth and fuel tank connection.Proportion electro-magnet YV2 on the electro-hydraulic proportional reducing valve is an electriferous state not, the logical Z mouth of the X mouth of electro-hydraulic proportional reducing valve at this moment, and the Y mouth leads to fuel tank.With reference to shown in Figure 2, the hydraulic oil that enters the P mouth of braking force control system passes through X mouth, the Z mouth of solenoid directional control valve B position, and X mouth, the Z mouth through electro-hydraulic proportional reducing valve can directly affact front-wheel brake again.When proportion electro-magnet YV2 is charged, oil circuit X, Z still connect, and the pressure of electro-hydraulic proportional reducing valve output is directly proportional with the electric signal of input, by give its with proportion electro-magnet YV2 input and the cooresponding electric signal of wishing to get of force value, can realize the output of the proportional pressure-reducing valve force value expected.Be installed in the operator's compartment electrical control gear such as potential device by handling one, the electric signal that spool that can controlled proportional pressure-reducing valve moves.Be installed in the interior electrical control gear of operator's compartment and can establish a plurality of gears in position, to obtain different electric signals.So, to handle one and be installed in electrical control gear in the operator's compartment, the hydraulic oil of the P mouth of the control setup of self-retention in the future outputs on the front-wheel brake by the force value of expecting, implements braking.
When vehicle in the middle of driving process, the foot brake valve with the pedal state of nature under be to be built under the effect of the spring in the foot brake valve, be in the jack-up state.When the needs glancing impact, push down on the pedal overcomes spring, and promotes to be built in the front-wheel reducing valve in the foot brake valve, the valve core movement of trailing wheel reducing valve, thereby the inner passage of getting through is separately connected X mouth and Z mouth, thereby makes the pressure oil from Hydraulic Pump or energy storage offer braking force control system.
Complete process is, when vehicle ' arrives certain specific road surface, the gear that adapts with these road conditions that chaufeur can select to be installed in electrical control gear in the operator's compartment, when the needs glancing impact, step on the pedal of foot brake valve, at this moment pass through X mouth, the Z mouth of front-wheel reducing valve from the hydraulic oil of Hydraulic Pump, pass through X mouth, the Z mouth of solenoid directional control valve B position again, X mouth, Z mouth through electro-hydraulic proportional reducing valve finally reach front-wheel brake, and the piston that promotes drg is implemented braking.When braking finishes when unclamping foot valve, the hydraulic oil of front-wheel brake through check valve, passes through Z mouth, the X mouth of solenoid directional control valve B position again under the effect of brake spring, Z mouth, Y mouth that process is built in the front-wheel reducing valve of foot valve are pushed back fuel tank, thus brake off.
Claims (2)
1. quarry tipper front wheel brake system, comprise that a Hydraulic Pump (22) reaches and Hydraulic Pump (22) input end bonded assembly fuel tank (21), described Hydraulic Pump (22) drive end is connected with the actuating unit (23) of quarry tipper, front-wheel reducing valve (31) in the foot brake valve (24) of the mouth of described Hydraulic Pump (22) and quarry tipper is connected, the mouth of described front-wheel reducing valve (31) is connected with front-wheel brake (26) through braking force control system (25), it is characterized in that: described braking force control system (25) comprises a two-bit triplet solenoid directional control valve (28) and check valve (29), the electro-hydraulic proportional reducing valve (30) that is provided with in parallel with described check valve (29).
2. a kind of quarry tipper front wheel brake device according to claim 1 is characterized in that: be connected with described front-wheel reducing valve (31) and also be provided with energy storage (27).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201590484U CN201659975U (en) | 2010-03-29 | 2010-03-29 | Front wheel braking system of dumper for mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201590484U CN201659975U (en) | 2010-03-29 | 2010-03-29 | Front wheel braking system of dumper for mine |
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| Publication Number | Publication Date |
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| CN201659975U true CN201659975U (en) | 2010-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201590484U Expired - Fee Related CN201659975U (en) | 2010-03-29 | 2010-03-29 | Front wheel braking system of dumper for mine |
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| CN (1) | CN201659975U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102350987A (en) * | 2011-07-31 | 2012-02-15 | 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 | Electronic service braking system for electric wheel mining dump truck |
| CN102717788A (en) * | 2012-06-01 | 2012-10-10 | 内蒙古北方重型汽车股份有限公司 | Braking device of heavy-duty mining dump truck |
| CN103359594A (en) * | 2013-07-30 | 2013-10-23 | 西安煤矿机械有限公司 | Cage locking swing deck |
| CN103407442A (en) * | 2013-07-23 | 2013-11-27 | 内蒙古北方重型汽车股份有限公司 | Emergency brake control device for electric transmission mining dump truck |
| CN105857281A (en) * | 2016-04-18 | 2016-08-17 | 徐州徐工挖掘机械有限公司 | Anti-lock braking system (ABS)/anti-skip regulation (ASR) integrated hydraulic system of off-highway mechanical drivedumper |
| CN108953419A (en) * | 2018-09-25 | 2018-12-07 | 杭叉集团股份有限公司 | A kind of hydraulic brake system |
| CN109263622A (en) * | 2018-09-30 | 2019-01-25 | 广西柳工机械股份有限公司 | The full power hydraulic brake system and engineering machinery of combination valve and more braking approach |
| CN110155015A (en) * | 2019-04-26 | 2019-08-23 | 第一拖拉机股份有限公司 | A kind of used with tractor automatic brake control valve |
| WO2023216746A1 (en) * | 2022-05-10 | 2023-11-16 | 内蒙古北方重型汽车股份有限公司 | Braking apparatus for unmanned mining dump truck and braking method therefor |
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2010
- 2010-03-29 CN CN2010201590484U patent/CN201659975U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102350987A (en) * | 2011-07-31 | 2012-02-15 | 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 | Electronic service braking system for electric wheel mining dump truck |
| CN102350987B (en) * | 2011-07-31 | 2015-08-12 | 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 | A kind of electronic travelling crane braking system for mining electric wheeled dumper |
| CN102717788A (en) * | 2012-06-01 | 2012-10-10 | 内蒙古北方重型汽车股份有限公司 | Braking device of heavy-duty mining dump truck |
| CN103407442A (en) * | 2013-07-23 | 2013-11-27 | 内蒙古北方重型汽车股份有限公司 | Emergency brake control device for electric transmission mining dump truck |
| CN103359594A (en) * | 2013-07-30 | 2013-10-23 | 西安煤矿机械有限公司 | Cage locking swing deck |
| CN103359594B (en) * | 2013-07-30 | 2016-01-20 | 西安煤矿机械有限公司 | A kind of lock tank cage chair |
| CN105857281A (en) * | 2016-04-18 | 2016-08-17 | 徐州徐工挖掘机械有限公司 | Anti-lock braking system (ABS)/anti-skip regulation (ASR) integrated hydraulic system of off-highway mechanical drivedumper |
| CN108953419A (en) * | 2018-09-25 | 2018-12-07 | 杭叉集团股份有限公司 | A kind of hydraulic brake system |
| CN108953419B (en) * | 2018-09-25 | 2023-12-01 | 杭叉集团股份有限公司 | Hydraulic braking system |
| CN109263622A (en) * | 2018-09-30 | 2019-01-25 | 广西柳工机械股份有限公司 | The full power hydraulic brake system and engineering machinery of combination valve and more braking approach |
| CN109263622B (en) * | 2018-09-30 | 2021-05-14 | 广西柳工机械股份有限公司 | Full hydraulic braking system with multiple braking paths and engineering machinery |
| CN110155015A (en) * | 2019-04-26 | 2019-08-23 | 第一拖拉机股份有限公司 | A kind of used with tractor automatic brake control valve |
| WO2023216746A1 (en) * | 2022-05-10 | 2023-11-16 | 内蒙古北方重型汽车股份有限公司 | Braking apparatus for unmanned mining dump truck and braking method therefor |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SANYI HEAVY-DUTY EQUIPMENT CO., LTD. Free format text: FORMER OWNER: SANY HEAVY MACHINE CO., LTD. Effective date: 20120320 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 215300 SUZHOU, JIANGSU PROVINCE TO: 110027 SHENYANG, LIAONING PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20120320 Address after: Yansai Lake Street 110027 economic and Technological Development Zone Liaoning city Shenyang province No. 31 Patentee after: Sany Heavy Equipment Co.,Ltd. Address before: 31 Industrial Park, Songhua River Road, Kunshan Economic Development Zone, Jiangsu 215300, China Patentee before: Sany Heavy Machine Co., Ltd. |
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| ASS | Succession or assignment of patent right |
Owner name: SANY MINING MACHINERY CO., LTD. Free format text: FORMER OWNER: SANY HEAVY EQUIPMENT CO., LTD. Effective date: 20120724 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 110027 SHENYANG, LIAONING PROVINCE TO: 215300 SUZHOU, JIANGSU PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120724 Address after: The Yangcheng Lake Road Development Zone in Kunshan City, Suzhou City, Jiangsu province 215300 No. 999 room 18 Patentee after: Sany Mining Machinery Co., Ltd. Address before: Yansai Lake Street 110027 economic and Technological Development Zone Liaoning city Shenyang province No. 31 Patentee before: Sany Heavy Equipment Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101201 Termination date: 20160329 |