CN103452928A - Novel hydraulic logic motor and control method thereof - Google Patents
Novel hydraulic logic motor and control method thereof Download PDFInfo
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- CN103452928A CN103452928A CN2013103763039A CN201310376303A CN103452928A CN 103452928 A CN103452928 A CN 103452928A CN 2013103763039 A CN2013103763039 A CN 2013103763039A CN 201310376303 A CN201310376303 A CN 201310376303A CN 103452928 A CN103452928 A CN 103452928A
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- oil cylinder
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- directional control
- solenoid directional
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Abstract
The invention relates to a novel hydraulic logic motor which comprises a motor shell and a rotor with an output shaft, wherein 360degrees/theta degrees locating pin holes are formed in the outer side of the rotor and correspond to output locating pins; 360degrees/theta degrees inner cavity slots are reserved in the inner side of the rotor and correspond to one connecting shaft pin; theta degrees is the rotation angle of the rotor; a rotary oil cylinder can entirely rotate around the pins; a cylinder rod is hinged to the connecting shaft pin which is simultaneously hinged to the cylinder rod; the cylinder rod is controlled by an electromagnetic directional valve I and pushes the whole oil cylinder to rotate around the pins; the cylinder rod performs telescopic movement to drive the connecting shaft pin to pass in and out the inner cavity slots of the rotor and is controlled by an electromagnetic directional valve II; the head of the cylinder rod is provided with the output locating pins, and the cylinder rod is controlled by an electromagnetic directional valve III. An organic combination mode of the hydraulic oil cylinder and the hydraulic electromagnetic valves is utilized, and the rotation angle in each step is changed by virtue of changing the quantity of slots at the inner and outer sides of the rotor, so that a simple oil cylinder and electromagnetic valve structure can be used for realizing a low-speed large-torque stepping rotation function.
Description
Technical field
The present invention relates to a kind of novel hydraulic pressure logic motor and controlling method thereof.Be mainly used in the low-speed big operating mode, according to direction and the speed clockwise and anticlockwise set, fix an angle, can be applied in the applications such as rig drill steel storehouse pipe-rod changing mechanism.
Background technique
Usually oil hydraulic motor is continuous operation, the minimum speed requirement is also arranged, if realize the rotating speed of 3-5 rev/min, need oil hydraulic motor band speed reducer to realize, if being applied in rig drill steel storehouse pipe-rod changing mechanism requires like this in the situation that realize that than heavy load speed is slow, the place of each forward or certain tilt fixing that reverses, existing oil hydraulic motor or mechanical mechanism are just very difficult, need a kind of volume little, simple in structure, can realize several angle at a slow speed the hydraulic pressure logic motor of clockwise and anticlockwise meet this or similar operating mode.
Summary of the invention
Technical problem to be solved by this invention is: large for existing oil hydraulic motor band speed reducer volume, cost is high, can't realize that accurate angular positive-negative is to problems such as steppings, a kind of novel hydraulic pressure logic motor and controlling method thereof are provided, realize low-speed big clockwise and anticlockwise several angle.
In order to solve the problems of the technologies described above, the present invention realizes by following technical proposal:
A kind of novel hydraulic pressure logic motor, comprise motor casing, rotor with output shaft, it is characterized in that: the described rotor outside is provided with 360 a °/θ ° positioning pin hole, positioning pin hole is corresponding with the output locating stud of a locating stud oil cylinder, a 360 °/θ ° inner chamber groove is left in the inboard of rotor, it is corresponding that inner chamber groove and connects pivot pin, the θ ° of angle that is rotor, one rotating hydraulic cylinder can whole be rotated around pin, the cylinder bar of rotating hydraulic cylinder is with to be connected pivot pin hinged, connect pivot pin simultaneously hinged with the cylinder bar of a push-tight oil cylinder, the cylinder bar of rotating hydraulic cylinder is controlled by solenoid directional control valve one, push-tight oil cylinder integral body is rotated around pin, the cylinder bar fore and aft motion of push-tight oil cylinder drives and connects pivot pin turnover rotor internal cavity groove, the cylinder bar of push-tight oil cylinder is controlled by solenoid directional control valve two, the cylinder club head of locating stud oil cylinder is the output locating stud, the cylinder bar of locating stud oil cylinder is controlled by solenoid directional control valve three, solenoid directional control valve one.
The filler opening of described solenoid directional control valve one, solenoid directional control valve two, solenoid directional control valve three is parallel to extraneous hydraulic power P mouth, return opening also is parallel to extraneous hydraulic power T mouth, and the oil outlet of three valves is connected with rotating hydraulic cylinder, push-tight oil cylinder and locating stud oil cylinder with hydraulic oil pipe by hydraulic fitting respectively.
The output locating stud of described locating stud oil cylinder is conical dowel pin.
A kind of controlling method of novel hydraulic logic motor: original state is that rotating hydraulic cylinder is in left position, the push-tight oil cylinder is upper, the locating stud oil cylinder is in left position, realize rotor dextrorotation θ °, the electromagnet DT3 of solenoid directional control valve three obtained electric commutation before this, the locating stud oil cylinder is moved to right, locating stud goes out pin, the electromagnet DT1 that is again solenoid directional control valve one obtains electric commutation, and rotating hydraulic cylinder is moved to right, and the rotor interlock is changed a job to part to right rotation θ °, the electromagnet DT3 dead electricity commutation of solenoid directional control valve three, the locating stud oil cylinder is moved to left, and locating stud enters pin, and fixed rotor can not rotate; The electromagnet DT2 of solenoid directional control valve two obtains electric commutation, and the push-tight oil cylinder is moved down, and connects pivot pin and moves downward out pin; The electromagnet DT1 dead electricity commutation of solenoid directional control valve one, move to left rotating hydraulic cylinder; The electromagnet DT2 dead electricity commutation of solenoid directional control valve two, make to move on the push-tight oil cylinder, connects pivot pin and move upward into pin, to initial position, completes one-period.
Original state is rotating hydraulic cylinder in right position, and the push-tight oil cylinder is upper, and the locating stud oil cylinder is in left position; Realize the left-handed θ ° of rotor, the electromagnet DT3 of solenoid directional control valve three obtained electric commutation before this, and the locating stud oil cylinder is moved to right, locating stud goes out pin, the electromagnet DT1 dead electricity of solenoid directional control valve one commutation again, move to left rotating hydraulic cylinder, and the rotor interlock is changed a job to part to anticlockwise θ °; The electromagnet DT3 dead electricity commutation of solenoid directional control valve three, move to left the locating stud oil cylinder, and locating stud enters pin, and fixed rotor can not rotate; The electromagnet DT2 of solenoid directional control valve two obtains electric commutation, and the push-tight oil cylinder is moved down, and connects pivot pin and moves downward out pin; The electromagnet DT1 of solenoid directional control valve one obtains electric commutation, and rotating hydraulic cylinder is moved to right; The electromagnet DT2 dead electricity commutation of solenoid directional control valve two, make to move on the push-tight oil cylinder, connects pivot pin and move upward into pin, to initial position, completes one-period.
After adopting said structure: utilize three hydraulic jacks to add the mode of three hydraulic buttery valve organic assembling, change the angle of every step rotation by the quantity that changes the groove in the outside in rotor, can realize low-speed big stepping spinfunction with simple oil cylinder and electromagnetic valve structure, realize hydraulic pressure logic motor function.
The accompanying drawing explanation
Fig. 1 structural representation of the present invention.
specific implementation method
Referring to Fig. 1, a kind of novel hydraulic pressure logic motor, by motor casing 1, rotating hydraulic cylinder 2, with the rotor 3 of output shaft, connect the parts such as pivot pin 4, push-tight oil cylinder 5, locating stud oil cylinder 6, hydraulic fitting 7, hydraulic oil pipe 8, solenoid directional control valve 9～11, positioning pin hole 12, output locating stud 13, inner chamber groove 14 and form, the rotor with output shaft 3 in Fig. 1 is outputs of motor, and all the other all parts all are equipped with for the motion of controlling rotor 3.If motor will rotate θ ° (being the angle of rotor 3 rotations) at every turn, stay so 360 °/θ °=n positioning pin hole 12 in rotor 3 outsides, corresponding with the output locating stud 13 of locating stud oil cylinder 6, the inboard of rotor 3 stays n cylinder type inner chamber groove 14, and with connecting, pivot pin 4 is corresponding.If realize the angle rotation of 45 ° of every steps, need to stay in rotor 3 outsides 360 °/45 °=8 positioning pin holes, corresponding with the output locating stud of locating stud oil cylinder 6, the inboard of rotor 3 stays 8 cylinder type inner chamber grooves 14, and with connecting, pivot pin 4 is corresponding.Rotor 3 can only carry out left-handed or dextrorotation, cannot carry out the action of other direction.One end of rotor 3 connects the workpiece that needs rotation, such as the workpiece drilling rod in the pipe-rod changing mechanism of rig drill steel storehouse.
Rodless cavity one end of rotating hydraulic cylinder 2 adopts hinged mode to be arranged on motor casing 1, rotating hydraulic cylinder 2 integral body can be rotated around pin a as shown in Figure 1, the cylinder bar of rotating hydraulic cylinder 2 is with to be connected pivot pin 4 hinged, connect pivot pin 4 simultaneously hinged with the cylinder bar of push-tight oil cylinder 5, the cylinder bar fore and aft motion of rotating hydraulic cylinder 2 can drive connection pivot pin 4 and carry out the left and right operation.The cylinder bar of rotating hydraulic cylinder 1 moves left and right mainly and is controlled by solenoid directional control valve 1, if the electromagnet DT1 no electric circuit of solenoid directional control valve one, pressure oil P enters the rod chamber of rotating hydraulic cylinder 2, and rotating hydraulic cylinder 2 moves to left, until oil cylinder is to top; If the electromagnet DT1 of solenoid directional control valve one energising, pressure oil P enters the rodless cavity of rotating hydraulic cylinder 2, and rotating hydraulic cylinder 2 moves to right, until oil cylinder is to top.The cylinder body of push-tight oil cylinder 5 adopts hinged mode to be arranged on motor casing 1, and push-tight oil cylinder 5 integral body can be rotated around pin c as shown in Figure 1.The cylinder bar of push-tight oil cylinder 5 is with to be connected pivot pin 4 hinged, and the cylinder bar fore and aft motion of push-tight oil cylinder 5 can drive and connect pivot pin 4 and passed in and out rotor 3 inner chamber grooves.The cylinder bar forward-reverse of push-tight oil cylinder 5 is mainly controlled by solenoid directional control valve 2 10, if the electromagnet DT2 no electric circuit of solenoid directional control valve 2 10, pressure oil P enters the rodless cavity of push-tight oil cylinder 5, and push-tight oil cylinder 5 advances, until will connect pivot pin 4, heads into rotor 3 inner chamber grooves; If the electromagnet DT2 of solenoid directional control valve 2 10 energising, pressure oil P enters the rod chamber of push-tight oil cylinder 5, and push-tight oil cylinder 5 retreats, and pulls out rotor 3 inner chamber grooves until will connect pivot pin 4, till push-tight oil cylinder 5 retreats to the end.The cylinder body of locating stud oil cylinder 6 adopts the mode be completely fixed to be arranged on motor casing 1, locating stud oil cylinder 6 cylinder bodies and motor casing 1 are without relative movement, conical dowel pin of cylinder club head band of locating stud oil cylinder 6, can enter the positioning pin hole in rotor 3 outsides, play the effect that restrict rotor 3 is rotated.The cylinder bar forward-reverse of locating stud oil cylinder 6 is mainly controlled by solenoid directional control valve 39, if the electromagnet DT3 no electric circuit of solenoid directional control valve 39, pressure oil P enters the rodless cavity of solenoid directional control valve 39, locating stud oil cylinder 6 advances (moving to left), until the conical dowel pin of locating stud oil cylinder 6 cylinder masthead sections is headed into to the positioning pin hole of rotor 3 outside; The electromagnet DT3 energising of solenoid directional control valve 39, pressure oil P enters the rod chamber of locating stud oil cylinder 6, and locating stud oil cylinder 6 retreats and moves to right, until locating stud oil cylinder 6 moves to right to the end.
The filler opening of solenoid directional control valve 1, solenoid directional control valve 2 10, solenoid directional control valve 39 is parallel to extraneous hydraulic power P mouth, return opening also is parallel to extraneous hydraulic power T mouth, the oil outlet of three valves is connected with rotating hydraulic cylinder 2, push-tight oil cylinder 5 and locating stud oil cylinder 6 with hydraulic oil pipe 8 by hydraulic fitting 7 respectively, and electromagnet DT1, the DT2 by controlling three solenoid valves and the power on/off of DT3 can be controlled the fore and aft motion of three oil cylinders.
Motor casing 1 is shell and the structural support of whole motor, and all parts are all in motor casing inside, and 3 oil cylinders also all are arranged on motor casing 1.The control of whole motor and driving mainly contain two oil pipes of PT, and the six roots of sensation electric wire of DM DT1, DT2, DT3 all will pass through the surface of motor casing 1.
Said structure changes the angle of every step rotation by the quantity that changes the groove in the outside in rotor, can realize low-speed big stepping spinfunction with simple oil cylinder and electromagnetic valve structure, realizes hydraulic pressure logic motor function.
Workflow and the controlling method of dextrorotation θ °: original state is rotating hydraulic cylinder 2 in left position, and push-tight oil cylinder 5 is upper, and locating stud oil cylinder 6 is in left position; Realize rotor 3 dextrorotation θ °, the electromagnet DT3 of solenoid directional control valve 39 obtained electric commutation before this, and locating stud oil cylinder 6 is moved to right, locating stud goes out pin, the electromagnet DT1 of solenoid directional control valve 1 obtains electric commutation again, and rotating hydraulic cylinder 2 is moved to right, and the rotor interlock is changed a job to part to right rotation θ °; The electromagnet DT3 dead electricity commutation of solenoid directional control valve 39, move to left locating stud oil cylinder 6, and locating stud enters pin, and fixed rotor can not rotate; The electromagnet DT2 of solenoid directional control valve 2 10 obtains electric commutation, and the push-tight oil cylinder is moved down, and connects pivot pin 6 and moves downward out pin; The electromagnet DT1 dead electricity commutation of solenoid directional control valve 1, move to left rotating hydraulic cylinder 2; The electromagnet DT2 dead electricity commutation of solenoid directional control valve 2 10, make to move on the push-tight oil cylinder, connects pivot pin 4 and move upward into pin, to initial position, completes one-period.
Workflow and the controlling method of left-handed θ °: original state is rotating hydraulic cylinder 2 in right position, and push-tight oil cylinder 5 is upper, and locating stud oil cylinder 6 is in left position; Realize the left-handed θ ° of rotor 3, the electromagnet DT3 of solenoid directional control valve 39 obtained electric commutation before this, and locating stud oil cylinder 6 is moved to right, locating stud goes out pin, the electromagnet DT1 dead electricity of solenoid directional control valve 1 commutation again, move to left rotating hydraulic cylinder 2, and the rotor interlock is changed a job to part to anticlockwise θ °; The electromagnet DT3 dead electricity commutation of solenoid directional control valve 39, move to left locating stud oil cylinder 6, and locating stud enters pin, and fixed rotor can not rotate; The electromagnet DT2 of solenoid directional control valve 2 10 obtains electric commutation, and the push-tight oil cylinder is moved down, and connects pivot pin 6 and moves downward out pin; The electromagnet DT1 of solenoid directional control valve 1 obtains electric commutation, and rotating hydraulic cylinder 2 is moved to right; The electromagnet DT2 dead electricity commutation of solenoid directional control valve 2 10, make to move on the push-tight oil cylinder, connects pivot pin 4 and move upward into pin, to initial position, completes one-period.
the Data Comparison of invention implementation result
Invention relatively, has following data before and after implementing:
| ? | before invention is implemented | after invention is implemented |
| export the zero motor quality of 2000NM moment of torsion | motor acceleration and deceleration machine is 95KG at least | hydraulic pressure logic motor 75KG of the present invention |
| the accuracy of angle | the employing electric angle is controlled, and controls complexity, and repeatability is poor, controls difficulty | pure mechanical structure guarantees that output angle is accurate, and repeatability is very high, only uses three switches and controls, and controls simple and reliable |
| working life and maintainability | due to electric closed loop control being arranged, the device type mistake easily appears, the rear more difficult decision problem that goes wrong, maintainability is poor. | pure mechanical structure, only have three solenoid valves easily to go wrong, and easily, maintainability is good in judgement. |
Claims (5)
1. a novel hydraulic pressure logic motor, comprise motor casing (1), rotor (3) with output shaft, it is characterized in that: described rotor (3) outside is provided with 360 a °/θ ° positioning pin hole (12), positioning pin hole (12) is corresponding with the output locating stud (13) of a locating stud oil cylinder (6), a 360 °/θ ° inner chamber groove (14) is left in the inboard of rotor (3), it is corresponding that inner chamber groove (14) and connects pivot pin (4), θ ° is the angle that rotor (3) rotates, one rotating hydraulic cylinder (1) can whole be rotated around pin (a), the cylinder bar of rotating hydraulic cylinder (1) is with to be connected pivot pin (4) hinged, connect pivot pin (4) simultaneously hinged with the cylinder bar of a push-tight oil cylinder (5), the cylinder bar of rotating hydraulic cylinder (1) is controlled by solenoid directional control valve one (11), push-tight oil cylinder (5) is whole to be rotated around pin (c), the cylinder bar fore and aft motion of push-tight oil cylinder (5) drives and connects pivot pin (4) turnover rotor (3) inner chamber groove (14), the cylinder bar of push-tight oil cylinder (5) is controlled by solenoid directional control valve two (10), the cylinder club head of locating stud oil cylinder (6) is output locating stud (13), the cylinder bar of locating stud oil cylinder (6) is controlled by solenoid directional control valve three (9).
2. a kind of novel hydraulic pressure logic motor as claimed in claim 1, it is characterized in that: the filler opening of described solenoid directional control valve one (11), solenoid directional control valve two (10), solenoid directional control valve three (9) is parallel to extraneous hydraulic power P mouth, return opening also is parallel to extraneous hydraulic power T mouth, and the oil outlet of three valves is connected with rotating hydraulic cylinder (2), push-tight oil cylinder (5) and locating stud oil cylinder (6) with hydraulic oil pipe (8) by hydraulic fitting (7) respectively.
3. a kind of novel hydraulic pressure logic motor as claimed in claim 1, it is characterized in that: the output locating stud of described locating stud oil cylinder (6) is conical dowel pin.
4. the controlling method of novel hydraulic logic motor as claimed in claim 1 or 2, it is characterized in that: original state is that rotating hydraulic cylinder (2) is in left position, push-tight oil cylinder (5) is upper, locating stud oil cylinder (6) is in left position, realize rotor (3) dextrorotation θ °, the electromagnet DT3 of solenoid directional control valve three (9) obtained electric commutation before this, locating stud oil cylinder (6) is moved to right, locating stud goes out pin, the electromagnet DT1 that is again solenoid directional control valve one (11) obtains electric commutation, rotating hydraulic cylinder (2) is moved to right, the rotor interlock is changed a job to part to right rotation θ °, the electromagnet DT3 dead electricity commutation of solenoid directional control valve three (9), locating stud oil cylinder (6) is moved to left, locating stud enters pin, fixed rotor can not rotate, the electromagnet DT2 of solenoid directional control valve two (10) obtains electric commutation, and the push-tight oil cylinder is moved down, and connects pivot pin (6) and moves downward out pin, the electromagnet DT1 dead electricity commutation of solenoid directional control valve one (11), move to left rotating hydraulic cylinder (2), the electromagnet DT2 dead electricity commutation of solenoid directional control valve two (10), make to move on the push-tight oil cylinder, connects pivot pin (4) and move upward into pin, to initial position, completes one-period.
5. the controlling method of novel hydraulic logic motor as claimed in claim 1 or 2 is characterized in that: original state be rotating hydraulic cylinder (2) in right position, push-tight oil cylinder (5) is upper, locating stud oil cylinder (6) is in left position; Realize the left-handed θ ° of rotor (3), the electromagnet DT3 of solenoid directional control valve three (9) obtained electric commutation before this, locating stud oil cylinder (6) is moved to right, locating stud goes out pin, the electromagnet DT1 dead electricity of solenoid directional control valve one (11) commutation again, rotating hydraulic cylinder (2) is moved to left, the rotor interlock is changed a job to part to anticlockwise θ °; The electromagnet DT3 dead electricity commutation of solenoid directional control valve three (9), move to left locating stud oil cylinder (6), and locating stud enters pin, and fixed rotor can not rotate; The electromagnet DT2 of solenoid directional control valve two (10) obtains electric commutation, and the push-tight oil cylinder is moved down, and connects pivot pin (6) and moves downward out pin; The electromagnet DT1 of solenoid directional control valve one (11) obtains electric commutation, and rotating hydraulic cylinder (2) is moved to right; The electromagnet DT2 dead electricity commutation of solenoid directional control valve two (10), make to move on the push-tight oil cylinder, connects pivot pin (4) and move upward into pin, to initial position, completes one-period.
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| CN201310376303.9A CN103452928B (en) | 2013-08-26 | 2013-08-26 | A kind of hydraulic logic motor and controlling method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310376303.9A CN103452928B (en) | 2013-08-26 | 2013-08-26 | A kind of hydraulic logic motor and controlling method thereof |
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| CN103452928A true CN103452928A (en) | 2013-12-18 |
| CN103452928B CN103452928B (en) | 2016-01-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107790228A (en) * | 2017-10-13 | 2018-03-13 | 徐工集团工程机械有限公司 | A kind of impact breaker, its rotor fixed position system and rotor fixed position method |
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| GB812589A (en) * | 1956-03-15 | 1959-04-29 | Cleveland Pneumatic Tool Co | Improvements in or relating to steering mechanism |
| US20040212249A1 (en) * | 2003-04-28 | 2004-10-28 | Tokico Ltd. | Electric disc brake apparatus |
| US20050001504A1 (en) * | 2002-01-07 | 2005-01-06 | Industrial Technology Research Institute | Motor of rotor with built-in permanent magnet |
| CN101033760A (en) * | 2007-04-10 | 2007-09-12 | 杭州慧翔电液技术开发有限公司 | Polyphase multi-rhythm stepped plunger piston hydraulic motor |
| US20080053269A1 (en) * | 2006-08-31 | 2008-03-06 | Toyota Jidosha Kabushiki Kaisha | Variable valve timing system and method for controlling the same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CS233774B1 (en) * | 1983-01-20 | 1985-03-14 | Vladimir Dasek | Stepping motor |
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2013
- 2013-08-26 CN CN201310376303.9A patent/CN103452928B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB812589A (en) * | 1956-03-15 | 1959-04-29 | Cleveland Pneumatic Tool Co | Improvements in or relating to steering mechanism |
| US20050001504A1 (en) * | 2002-01-07 | 2005-01-06 | Industrial Technology Research Institute | Motor of rotor with built-in permanent magnet |
| US20040212249A1 (en) * | 2003-04-28 | 2004-10-28 | Tokico Ltd. | Electric disc brake apparatus |
| US20080053269A1 (en) * | 2006-08-31 | 2008-03-06 | Toyota Jidosha Kabushiki Kaisha | Variable valve timing system and method for controlling the same |
| CN101033760A (en) * | 2007-04-10 | 2007-09-12 | 杭州慧翔电液技术开发有限公司 | Polyphase multi-rhythm stepped plunger piston hydraulic motor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107790228A (en) * | 2017-10-13 | 2018-03-13 | 徐工集团工程机械有限公司 | A kind of impact breaker, its rotor fixed position system and rotor fixed position method |
| CN107790228B (en) * | 2017-10-13 | 2023-02-10 | 江苏徐工工程机械研究院有限公司 | Impact crusher, rotor positioning system thereof and rotor positioning method |
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Address after: Hangzhou City, Zhejiang Province, 310099 west 2 Building No. 1500 Wen Applicant after: ZHEJIANG MOBILE HYDRAULIC POWER TECHNOLOGY CO.,LTD. Address before: 310051 No. 51 Xing Xing Road, Hangzhou, Zhejiang, Binjiang District Applicant before: ZHEJIANG MOBILE HYDRAULIC POWER TECHNOLOGY CO.,LTD. |
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Address after: Yuhang District, Hangzhou City, Zhejiang province 310099 Wenyi Road No. 1500 Building No. 2 Applicant after: ZHEJIANG MOBILE HYDRAULIC POWER TECHNOLOGY CO.,LTD. Address before: Hangzhou City, Zhejiang Province, 310099 west 2 Building No. 1500 Wen Applicant before: ZHEJIANG MOBILE HYDRAULIC POWER TECHNOLOGY CO.,LTD. |
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Denomination of invention: A hydraulic logic motor and its control method Effective date of registration: 20230103 Granted publication date: 20160120 Pledgee: Bank of Jiangsu Limited by Share Ltd. Hangzhou branch Pledgor: ZHEJIANG MOBILE HYDRAULIC POWER TECHNOLOGY CO.,LTD. Registration number: Y2022980029283 |
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