CN103112382A - Anti-pull cylinder control device and mining dump truck - Google Patents
Anti-pull cylinder control device and mining dump truck Download PDFInfo
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- CN103112382A CN103112382A CN2013100885848A CN201310088584A CN103112382A CN 103112382 A CN103112382 A CN 103112382A CN 2013100885848 A CN2013100885848 A CN 2013100885848A CN 201310088584 A CN201310088584 A CN 201310088584A CN 103112382 A CN103112382 A CN 103112382A
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Abstract
The invention discloses an anti-pull cylinder control device and a mining dump truck, and belongs to the technical field of a dump truck. According to the control device, an A1 oil port of the device is communicated with a rodless cavity of a lifting cylinder, a B1 oil port of the device is communicated with a rod cavity of the lifting cylinder, an A0 oil port of the device is communicated with the A1 oil port, a B0 oil port of the device is communicated with the B1 oil port, a balance valve is located on an oil line between the B0 oil port and the B1 oil port, a control port of the balance valve is connected with a first electromagnetic valve, a parallel oil line is formed by a check valve and a first throttle valve, one end of the parallel oil line is communicated with the oil line between the A0 oil port and the A1 oil port, and the other end of the parallel oil line is communicated with the first electromagnetic valve. According to the anti-pull cylinder control device and the mining dump truck, the balance valve is arranged on the oil line connected with the rod cavity, and the throttle valve and the check valve are arranged between the rod cavity oil line and the rodless cavity oil line in parallel, so that the balance valve has a faster response speed, and the effect of restraining cylinder pulling is obvious.
Description
Technical field
The present invention relates to the dumping car technical field, particularly a kind of anti-pull out cylinder control setup and quarry tipper.
Background technology
Quarry tipper is a kind of mining transportation vehicle that is used for mining, being mainly used in the open, the mine is to complete the rock earthwork to peel off a kind of non-highway heavy-duty tipper that uses with the Ore Transportation task, be applicable to all kinds of mines, hydraulic engineering, have the characteristics such as length of run is short, turn radius is little, load is heavy, physical dimension is large.
The discharging of quarry tipper is by three revolute pair (O in figure of lifting mechanism
1, O
2, O
3) rotation and the stretching motion of load lifting cylinder realize, as shown in Figure 1.For prevent from unloading material from car body close to, bury wheel, railway carriage 3 and vehicle frame 1 hinge (O in figure
1) to railway carriage 3 tip designs long distance (being referred to as rear seesaw), material need slip over rear seesaw and just can be removed.Railway carriage 3 and material will be at O
1Point forms lever principle.When the body lifting angle hour, O
1Point the place ahead solid accumulation is more, at this moment O
1The gravitational moment of some the place ahead material is greater than the gravitational moment of rear material, and load lifting cylinder 2 need provide certain moment of thrust can realize uniform rotation and the discharging of railway carriage; When railway carriage 3 lifting angles increase gradually, O
1Point the place ahead material is piled up on rear seesaw gradually, may cause O
1The gravitational moment of some the place ahead material is less than the gravitational moment of rear material, and at this moment load lifting cylinder 2 need provide certain drag torque could realize the moment balance in compartment.
But quarry tipper in the process of discharging, the accumulation of material on rear seesaw often moment complete, turn over to end position after causing railway carriage rapidly, make car load produce larger vibration, produce and pull out the cylinder phenomenon.Theoretically, after the existence, the compartment of seesaw all can't be eradicated and pull out the cylinder phenomenon.But it is less that packing ratio, dump angle railway carriage reasonable in design produces the probability of pulling out cylinder, and material has little time to pile up on rear seesaw and just is removed.Only have when position that the larger material of vehicle loading viscosity or material load too when rear, producing the probability of pulling out cylinder just can increase.
Dumping car produces and pulls out the comfort level that the cylinder phenomenon has a strong impact on vehicle, and the pressure peak of its generation also will produce harmful effect to car load, therefore, be necessary to be optimized in system, pull out the cylinder probability with reduction, strengthens vehicle to the adaptive capacity of different material.
Summary of the invention
Pull out in order to solve present dumping car generation the comfort level that the cylinder phenomenon can affect vehicle, and car load is produced dysgenic problem, a kind of anti-cylinder control setup that pulls out now is provided.Concrete technical scheme is as follows:
a kind of anti-cylinder control setup that pulls out, be connected between load lifting cylinder and lifting valve, described load lifting cylinder is between vehicle frame and compartment, and be divided into rodless cavity and rod chamber, wherein, include flow regulating valve one, check valve one, electromagnetic valve and balance cock, the A hydraulic fluid port of described lifting valve is communicated with the A0 hydraulic fluid port of described device, the B hydraulic fluid port of described lifting valve is communicated with the B0 hydraulic fluid port of described device, the A1 hydraulic fluid port of described device is communicated with the rodless cavity of described load lifting cylinder, the B1 hydraulic fluid port of described device is communicated with the rod chamber of described load lifting cylinder, be communicated with between described A0 hydraulic fluid port and described A1 hydraulic fluid port, be communicated with between described B0 hydraulic fluid port and described B1 hydraulic fluid port, described balance cock is on the oil circuit between described B0 hydraulic fluid port and described B1 hydraulic fluid port, described check valve and described flow regulating valve one form an oil circuit in parallel, one end of described oil circuit in parallel is communicated with the oil circuit between described A0 hydraulic fluid port and described A1 hydraulic fluid port, an other end is communicated with the control port of described electromagnetic valve one balance cock, it is from described balance cock to described A0-A1 oil circuit that described check valve one flows to.
Preferably, described load lifting cylinder has two, and another one load lifting cylinder rodless cavity is communicated with the A2 hydraulic fluid port of described device, and rod chamber is communicated with the B2 hydraulic fluid port of described device, and described A2 hydraulic fluid port is communicated with the A0-A1 oil circuit, and described B2 hydraulic fluid port is communicated with described B0-B1 oil circuit.
Preferably, also comprise oil return inlet T, electromagnetic valve one and flow regulating valve two, described electromagnetic valve is between described oil circuit in parallel and described balance cock, and described electromagnetic valve one connects described hydraulic fluid port T, and described flow regulating valve two is positioned on oil circuit between described electromagnetic valve and described hydraulic fluid port T.
Preferably, described hydraulic fluid port A0, hydraulic fluid port B0, hydraulic fluid port A1 and hydraulic fluid port B1 place are provided with pressure tap.
Preferably, the oil circuit between described hydraulic fluid port T and described hydraulic fluid port B1 is provided with by pass valve one.
Preferably, be connected with electromagnetic valve two between described hydraulic fluid port T and described A0-A1 oil circuit, be connected with electromagnetic valve three between described hydraulic fluid port T and described B0-B1 oil circuit, be parallel with respectively check valve two and flow regulating valve three with described balance cock on described B0-B1 oil circuit, described check valve two flows to and is the direction along the B1-B0 oil circuit.
Preferably, the oil circuit between described hydraulic fluid port B1 and described hydraulic fluid port T is provided with by pass valve two.
Preferably, valve piece described above is inserted valve, and is integrated in and unifies one valve piece.
A kind of quarry tipper, described quarry tipper have the anti-cylinder control setup that pulls out described above.
Compared with prior art, technique scheme provides anti-ly pulls out the cylinder control setup and quarry tipper has the following advantages: by on the oil circuit that connects at rodless cavity, balance cock being set, between oil circuit that rod chamber connects and rodless cavity oil circuit, flow regulating valve, check valve in parallel are set, make balance cock have speed of response faster, suppress to pull out the cylinder successful, simultaneously, balance cock also can change pro-active intervention into by passive response, reduced producing the probability that pulls out cylinder, improved stationarity and the traveling comfort in the lifting process.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, during the below will describe embodiment, the accompanying drawing of required use is done to introduce simply, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the load lifting cylinder work schematic diagram that provides in prior art;
Fig. 2 is the anti-cylinder control setup work schematic diagram that pulls out that provides in the embodiment of the present invention.
In accompanying drawing, the component list of each label representative is as follows:
1 vehicle frame, 2 load lifting cylinders, 3 railway carriages, 4 lifting valves, 5 check valve one, 6 flow regulating valve one, 7 balance cocks, 8 electromagnetic valve one, 9 flow regulating valve two, 10 by pass valve two, 11 electromagnetic valve two, 12 electromagnetic valve three, 13 by pass valve one, 14 check valve two, 15 flow regulating valve three.
The specific embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
as shown in Figure 2, the embodiment of the present invention provides a kind of anti-cylinder control setup that pulls out, be connected between load lifting cylinder 2 and lifting valve 4, load lifting cylinder 2 is between vehicle frame 1 and compartment 3, and be divided into rodless cavity and rod chamber, wherein this device includes flow regulating valve 1, check valve 1, electromagnetic valve 1 and balance cock 7, the A0 hydraulic fluid port of the A hydraulic fluid port communication apparatus of lifting valve 4, the B0 hydraulic fluid port of the B hydraulic fluid port communication apparatus of lifting valve 4, the A1 hydraulic fluid port of device is communicated with the rodless cavity of load lifting cylinder 2, the B1 hydraulic fluid port of device is communicated with the rod chamber of load lifting cylinder 2, be communicated with between A0 hydraulic fluid port and A1 hydraulic fluid port, be communicated with between B0 hydraulic fluid port and B1 hydraulic fluid port, balance cock 7 is on the oil circuit between B0 hydraulic fluid port and B1 hydraulic fluid port, the control port connected electromagnetic valve 1 of balance cock 7, check valve 1 and flow regulating valve 1 form an oil circuit in parallel, one end of oil circuit in parallel is communicated with the oil circuit between A0 hydraulic fluid port and A1 hydraulic fluid port, an other end is communicated with electromagnetic valve 1, wherein check valve one 5 flow directions are from balance cock to the A0-A1 oil circuit.Load lifting cylinder 2 has two, the A2 hydraulic fluid port of another one load lifting cylinder rodless cavity communication apparatus, and the B2 hydraulic fluid port of rod chamber communication apparatus, the A2 hydraulic fluid port is communicated with the A0-A1 oil circuit, and the B2 hydraulic fluid port is communicated with the B0-B1 oil circuit.Device also comprises oil return inlet T and flow regulating valve 29, and electromagnetic valve 1 connects hydraulic fluid port T, and flow regulating valve 29 is positioned on oil circuit between electromagnetic valve 1 and hydraulic fluid port T.Hydraulic fluid port A0, hydraulic fluid port B0, hydraulic fluid port A1 and hydraulic fluid port B1 place are provided with pressure tap.Oil circuit between hydraulic fluid port T and hydraulic fluid port B1 is provided with by pass valve 1, and by pass valve 1 is safety valve, opens the safety of protection system element when the rod chamber internal pressure reaches this valve setting value.Be connected with electromagnetic valve 2 11 between hydraulic fluid port T and A0-A1 oil circuit, be connected with electromagnetic valve 3 12 between hydraulic fluid port T and B0-B1 oil circuit, be parallel with respectively check valve 2 14 and flow regulating valve 3 15 with balance cock 7 on the B0-B1 oil circuit.Wherein, check valve two flows to and is the direction along the B1-B0 oil circuit.Oil circuit between hydraulic fluid port B1 and hydraulic fluid port T is provided with by pass valve 2 10.Above-mentioned valve piece is inserted valve, and is integrated in and unifies one valve piece.
Below the simple principle of work of describing the embodiment of the present invention.
During body lifting, the A0 mouth of the fluid access to plant that the A mouth of lifting valve provides, and enter the rodless cavity of load lifting cylinder 2 by A1, the A2 mouth of device, thus make load lifting cylinder 2 elongation produce thrusts, compartment 3 discharging of tumbling; Simultaneously, oil circuit A0-A1(A2) fluid through flow regulating valve 1, electromagnetic valve one 8(electromagnet not electric) enter the control chamber of balance cock 7, balance cock 7 is opened, the fluid of load lifting cylinder 2 rod chambers can flow back to lifting valve 4 through B1 mouth, B2 mouth, the B0 mouth of device, flow back to fuel tank by lifting valve 4 inner passages, realize the lifting action of vehicle.Wherein balance cock 7 is for suppressing to pull out the main valve of cylinder, and when oil pressure in load lifting cylinder was reduced to setting value because pulling out cylinder, this valve cut out rapidly the path of rod chamber and fuel tank, made rod chamber be in closed state, reaches the effect that cylinder is pulled out in inhibition.Flow regulating valve 1 is used for floating and controls the speed in compartment when descending;
When making material moment be deposited on the rear seesaw in compartment 3, compartment 3 will be by material pressure backward, and load lifting cylinder 2 produces and pulls out the cylinder phenomenon; When pulling out cylinder, load lifting cylinder 2 rodless cavity internal pressures reduce, and even produce negative pressure, fluid in balance cock 7 control chambers through electromagnetic valve one 8(electromagnet not electric), check valve 1 flows back to oil circuit A0-A1(A2), balance valve core is closed, and makes load lifting cylinder 8 rod chamber sealings, plays the effect that cylinder is pulled out in inhibition; Because the response pressure of check valve 1 is extremely low, the control chamber of balance cock 7 release is rapidly closed, and has improved the speed of response of balance valve core, has namely improved the promptness that cylinder is pulled out in inhibition.For convenience of debugging and trouble diagnosing, anti-pulling out designed 4 pressure tap M1, M2, M3, M4 on the cylinder control setup;
When continuing the larger material of delivery viscosity, electromagnetic valve 1 is got electric, the fluid of balance cock 7 control chambers flows back to fuel tank through electromagnetic valve 1, flow regulating valve 29, and balance valve core will be in closed condition always, for load lifting cylinder 2 provides lasting back pressure, the back pressure value can be set by the balance valve core set screw; Because load lifting cylinder 2 rod chambers are in closed condition always, namely be in always and suppress to pull out the cylinder state, the change passive response is pro-active intervention, has promoted inhibition.
When carriage floating descended (freely descending under gravity), two electromagnetic valves 11 and 12(electromagnet got electric) can make the rodless cavity of load lifting cylinder 2, rod chamber connect respectively fuel tank, load lifting cylinder 2 is in relaxed state, and the compartment freely descends under Action of Gravity Field; This moment, flow regulating valve 3 15 played the effect of regulating the compartment descending speed, can be by changing orifice plug, the size of regulating throttle diameter, thereby the speed that the adjusting carriage floating descends.
When vehicle need to overhaul, need compartment 3 is lifted to the top, and plug the safety pin (not shown), after maintenance is completed, the operator often forgets and pulls out safety pin, and uses " power decline " function by force with the compartment landing, thus cause safety pin crooked, the accident such as cut off; At this moment, can reduce the pressure of " power decline " by by pass valve 2 10, the response pressure of this valve is lower; Preferred as the present embodiment, setting pressure is 20bar.
The anti-cylinder control setup balance valve core speed of response of pulling out provided by the invention is very fast, suppresses to pull out the cylinder successful; For the larger material of viscosity, can change the passive response of balance valve core into pro-active intervention, reduced producing the probability of pulling out cylinder, improved stationarity and the traveling comfort of lifting process; The carriage floating descending speed is adjustable; The operator forgets when pulling out safety pin, can protect safety pin and jack thereof.
A kind of quarry tipper, quarry tipper have the anti-cylinder control setup that pulls out described above.Other parts of quarry tipper can with reference to prior art, not repeat them here.
The above is only preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. prevent pulling out the cylinder control setup for one kind, be connected between load lifting cylinder and lifting valve, described load lifting cylinder is between vehicle frame and compartment, and be divided into rodless cavity and rod chamber, it is characterized in that, include flow regulating valve one, check valve one and balance cock, the A hydraulic fluid port of described lifting valve is communicated with the A0 hydraulic fluid port of described device, the B hydraulic fluid port of described lifting valve is communicated with the B0 hydraulic fluid port of described device, the A1 hydraulic fluid port of described device is communicated with the rodless cavity of described load lifting cylinder, the B1 hydraulic fluid port of described device is communicated with the rod chamber of described load lifting cylinder, be communicated with between described A0 hydraulic fluid port and described A1 hydraulic fluid port, be communicated with between described B0 hydraulic fluid port and described B1 hydraulic fluid port, described balance cock is on the oil circuit between described B0 hydraulic fluid port and described B1 hydraulic fluid port, described check valve one and described flow regulating valve one form an oil circuit in parallel, one end of described oil circuit in parallel is communicated with the oil circuit between described A0 hydraulic fluid port and described A1 hydraulic fluid port, an other end is communicated with the control port of described balance cock, it is from described balance cock to described A0-A1 oil circuit that described check valve one flows to.
2. the anti-cylinder control setup that pulls out according to claim 1, it is characterized in that, described load lifting cylinder has two, another one load lifting cylinder rodless cavity is communicated with the A2 hydraulic fluid port of described device, rod chamber is communicated with the B2 hydraulic fluid port of described device, described A2 hydraulic fluid port is communicated with the A0-A1 oil circuit, and described B2 hydraulic fluid port is communicated with described B0-B1 oil circuit.
3. the anti-cylinder control setup that pulls out according to claim 1, it is characterized in that, also comprise oil return inlet T, electromagnetic valve one and flow regulating valve two, described electromagnetic valve is between described oil circuit in parallel and described balance cock, described electromagnetic valve one connects described hydraulic fluid port T, and described flow regulating valve two is positioned on oil circuit between described electromagnetic valve and described hydraulic fluid port T.
4. according to claim 1ly anti-pull out the cylinder control setup, it is characterized in that, described hydraulic fluid port A0, hydraulic fluid port B0, hydraulic fluid port A1 and hydraulic fluid port B1 place are provided with pressure tap.
5. according to claim 3ly anti-pull out the cylinder control setup, it is characterized in that, the oil circuit between described hydraulic fluid port T and described hydraulic fluid port B1 is provided with by pass valve one.
6. the anti-cylinder control setup that pulls out according to claim 3, it is characterized in that, be connected with electromagnetic valve two between described hydraulic fluid port T and described A0-A1 oil circuit, be connected with electromagnetic valve three between described hydraulic fluid port T and described B0-B1 oil circuit, be parallel with respectively check valve two and flow regulating valve three with described balance cock on described B0-B1 oil circuit, described check valve two flows to and is the direction along the B1-B0 oil circuit.
7. according to claim 6ly anti-pull out the cylinder control setup, it is characterized in that, the oil circuit between described hydraulic fluid port B1 and described hydraulic fluid port T is provided with by pass valve two.
8. any one describedly anti-is pulled out the cylinder control setup according to claim 1 to 7, it is characterized in that, valve piece described above is inserted valve, and is integrated in and unifies one valve piece.
9. a quarry tipper, is characterized in that, described quarry tipper comprises the anti-cylinder control setup that pulls out claimed in claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310088584.8A CN103112382B (en) | 2013-03-19 | 2013-03-19 | One is anti-pulls out cylinder control setup and quarry tipper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310088584.8A CN103112382B (en) | 2013-03-19 | 2013-03-19 | One is anti-pulls out cylinder control setup and quarry tipper |
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| Publication Number | Publication Date |
|---|---|
| CN103112382A true CN103112382A (en) | 2013-05-22 |
| CN103112382B CN103112382B (en) | 2015-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310088584.8A Expired - Fee Related CN103112382B (en) | 2013-03-19 | 2013-03-19 | One is anti-pulls out cylinder control setup and quarry tipper |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106740054A (en) * | 2016-12-21 | 2017-05-31 | 湘电重型装备有限公司 | A kind of delivered payload capability is the electric power wheel self-discharging vehicle of 136t |
| CN117698545A (en) * | 2024-02-06 | 2024-03-15 | 三一重型装备有限公司 | Lifting control system, method and device of mining vehicle and mining vehicle |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3523490A (en) * | 1968-03-28 | 1970-08-11 | Caterpillar Tractor Co | Anti-cavitation mechanism for fluid driven systems |
| US3761123A (en) * | 1971-12-10 | 1973-09-25 | Applied Power Ind Inc | Flow control of tilt cab in free fall |
| US4367673A (en) * | 1981-01-09 | 1983-01-11 | Dresser Industries, Inc. | System and method for controlling the elevation of a boom hoist device |
| US5065664A (en) * | 1989-04-03 | 1991-11-19 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Control circuit for a cylinder allowing flow between an upper and a lower chamber |
| JP2006051879A (en) * | 2004-08-11 | 2006-02-23 | Kyokuto Kaihatsu Kogyo Co Ltd | Working vehicle |
| CN201090562Y (en) * | 2007-09-20 | 2008-07-23 | 韶关市起重机厂有限责任公司 | Electrohydraulic control system of tipper |
| CN202827257U (en) * | 2012-08-16 | 2013-03-27 | 秦皇岛天业通联重工股份有限公司 | Hydraulic lifting control system for mine self-discharging vehicle and mine self-discharging vehicle |
| CN203157803U (en) * | 2013-03-19 | 2013-08-28 | 三一矿机有限公司 | Cylinder-drawing preventing control device and mining dumper |
-
2013
- 2013-03-19 CN CN201310088584.8A patent/CN103112382B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3523490A (en) * | 1968-03-28 | 1970-08-11 | Caterpillar Tractor Co | Anti-cavitation mechanism for fluid driven systems |
| US3761123A (en) * | 1971-12-10 | 1973-09-25 | Applied Power Ind Inc | Flow control of tilt cab in free fall |
| US4367673A (en) * | 1981-01-09 | 1983-01-11 | Dresser Industries, Inc. | System and method for controlling the elevation of a boom hoist device |
| US5065664A (en) * | 1989-04-03 | 1991-11-19 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Control circuit for a cylinder allowing flow between an upper and a lower chamber |
| JP2006051879A (en) * | 2004-08-11 | 2006-02-23 | Kyokuto Kaihatsu Kogyo Co Ltd | Working vehicle |
| CN201090562Y (en) * | 2007-09-20 | 2008-07-23 | 韶关市起重机厂有限责任公司 | Electrohydraulic control system of tipper |
| CN202827257U (en) * | 2012-08-16 | 2013-03-27 | 秦皇岛天业通联重工股份有限公司 | Hydraulic lifting control system for mine self-discharging vehicle and mine self-discharging vehicle |
| CN203157803U (en) * | 2013-03-19 | 2013-08-28 | 三一矿机有限公司 | Cylinder-drawing preventing control device and mining dumper |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106740054A (en) * | 2016-12-21 | 2017-05-31 | 湘电重型装备有限公司 | A kind of delivered payload capability is the electric power wheel self-discharging vehicle of 136t |
| CN117698545A (en) * | 2024-02-06 | 2024-03-15 | 三一重型装备有限公司 | Lifting control system, method and device of mining vehicle and mining vehicle |
| CN117698545B (en) * | 2024-02-06 | 2024-05-03 | 三一重型装备有限公司 | Lifting control system, method and device of mining vehicle and mining vehicle |
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| CN103112382B (en) | 2015-08-26 |
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Effective date of registration: 20151105 Address after: 110000, No. 25, development road, Shenyang economic and Technological Development Zone, Liaoning Patentee after: Sany Heavy Equipment Co.,Ltd. Address before: 215300 18 building, No. 9999 Lake Road, Kunshan Development Zone, Jiangsu, Suzhou Patentee before: Sany Mining Machinery Co., Ltd. |
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Granted publication date: 20150826 Termination date: 20160319 |