CN1807903A - Hydraulic system - Google Patents
Hydraulic system Download PDFInfo
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- CN1807903A CN1807903A CN 200510002429 CN200510002429A CN1807903A CN 1807903 A CN1807903 A CN 1807903A CN 200510002429 CN200510002429 CN 200510002429 CN 200510002429 A CN200510002429 A CN 200510002429A CN 1807903 A CN1807903 A CN 1807903A
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- 239000003921 oil Substances 0.000 claims abstract description 51
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 42
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 27
- 230000033001 locomotion Effects 0.000 claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 239000002828 fuel tank Substances 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 15
- 230000000694 effects Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 abstract 3
- 238000010168 coupling process Methods 0.000 abstract 3
- 238000005859 coupling reaction Methods 0.000 abstract 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- -1 shaft joint Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The invention relates to a hydraulic system which comprises a low power motor; a speed reducer connected with the motor; a coupling connected with the speed reducer, and a power transmission device which comprises a roller screw rod connected with the coupling, a pushing plate, a pushing rod fixed on the pushing plate and a roller screw cap on the roller screw rod and fixed on the pushing plate. Wherein, the roller screw rod is vertically through the center of pushing plate and inserted into the center of inner chamber of pushing rod; two ends of pushing plate have two straight bearings which move on a couple of straight guide rods that parallel with the roller screw rod; the sealed cylinder is connected to the oil tank; the piston is fixed on the pushing and inside the cylinder to slide match the inner chamber of cylinder; the power of motor via the speed reducer, the coupling, the roller screw rod, and the roller screw cap is transmitted to the pushing plate to drive the pushing rod and the piston inside the cylinder to change the rotational direction of motor to make the piston oscillating move straightly inside the cylinder; and in said motion, the cylinder can continuously output high pressure and/or low pressure hydraulic oil.
Description
Technical field
The present invention relates to a kind of hydraulic system, relate in particular to the high-effect hydraulic system that a kind of low-power motor drives.
Background technique
The prior oil pressure system drives oil pump work with certain power motor, makes by oil pump work to produce pressure and certain flow in the pressurized oil system, by the hydraulic control valve control oil channel, system is finished the work, but there is following defective in this system:
(1) oil pump and control valve when work oil temperature is very high, and the oil temperature overheated be the topmost induced factors of the many faults of pressurized oil system, and influence the reliability and the working life of hydraulic element and system works.
(2) control unit that uses in the system is many, needs requisite critical piece oil pump, also needs powerful power motor starting operation simultaneously.
Noise was big when (3) motor and oil pump were worked, and influenced environmental protection and worker's health.
(4) control valve is inaccurate, is difficult to the accurately validity of control machine action in system, such as pressure, stroke (each validity that comes and goes etc.).
(5) the quality requirements height of hydraulic oil, use amount need also much to be unfavorable for environmental protection that working life is short, because the strong pressure friction of oil pump control valve makes the very fast heating of oil lose its performance.
(6) voltage of machine use also has certain limitation, and the voltage that most machines use is three-phase 380V, just can not use when having the 380V power supply.
Summary of the invention
For overcoming the above-mentioned defective of prior art, the purpose of this invention is to provide a kind of high-effect hydraulic system that can export high pressure and/or low-pressure hydraulic oil continuously.
For achieving the above object, the invention provides a kind of hydraulic system, it comprises successively: low-power motor; The speed reducer that links to each other with motor; The shaft joint that links to each other with speed reducer; Power transmission, it comprises: the ball screw that links to each other with shaft joint, slurcocks, be fixed on catch bar on the slurcocks, be arranged on the ball screw and be fixed on ball nut on the slurcocks; Ball screw vertically passes the center of slurcocks, and inserts the lumen centers of catch bar; The two ends of described slurcocks are respectively equipped with linear bearing, and two linear bearings move on a pair of linear guide that parallels with ball screw; The sealing cylinder bucket that is communicated with fuel tank; And being fixed on piston on the catch bar, piston is positioned at the cylinder bucket and is with the cylinder barrel cavity and is slidingly matched; The power of motor is passed to slurcocks by speed reducer, shaft joint, ball screw, ball nut, drives catch bar and piston and moves in the cylinder bucket; Change turning to of motor, make piston in the cylinder bucket, do linear reciprocating motion; In the stroke that piston moves back and forth in the cylinder bucket, the cylinder bucket is exported high pressure and/or low-pressure hydraulic oil continuously.
Described piston is fixed on the top of catch bar, and piston is divided into chamber A and chamber B with the inner chamber of cylinder bucket, and two one-way valves link to each other with chamber B with chamber A respectively, and fuel tank links to each other with chamber B with chamber A respectively by two one-way valves; During the piston positive movement, form vacuum in the A of chamber, the oil in the fuel tank is inhaled into chamber A by one-way valve, and the oil in the B of chamber produces high pressure or low pressure under the effect of piston, and by one-way valve output high pressure or low-pressure hydraulic oil; During the piston reverses direction motion, chamber A is by one-way valve output high pressure or low-pressure hydraulic oil, and the oil in the fuel tank is inhaled into chamber B by one-way valve; When the internal diameter of cylinder bucket is between 30-70mm, output high-pressure and hydraulic oil; When the internal diameter of cylinder bucket is between 100-300mm, the output low-pressure hydraulic oil.
Described cylinder bucket is made up of the low pressure (LP) cylinder bucket and the high-pressure cylinder bucket that link to each other, and the internal diameter of high-pressure cylinder bucket is less than the internal diameter of low pressure (LP) cylinder bucket; Piston is divided into chamber A and chamber B with the inner chamber of low pressure (LP) cylinder bucket; The inner chamber of catch bar and high-pressure cylinder bucket is and is slidingly matched, and the inner chamber of piston and low pressure (LP) cylinder bucket is and is slidingly matched; One-way valve links to each other with chamber A, chamber B, chamber C respectively; Fuel tank links to each other with chamber A, chamber B, chamber C respectively by three one-way valves; Only in the low pressure (LP) cylinder bucket during positive movement, chamber B and chamber C are respectively by one-way valve output low-pressure hydraulic oil for catch bar and piston; When the catch bar positive movement enters chamber C, chamber C output high-pressure and hydraulic oil, the oil in the fuel tank is inhaled into chamber A simultaneously; When catch bar and piston reverses direction motion, the oil content in the fuel tank is not inhaled into chamber C, chamber B by one-way valve; Simultaneously, output low-pressure hydraulic oil in the A of chamber.The internal diameter of described high-pressure cylinder bucket is between 30-70mm, and the internal diameter of low pressure (LP) cylinder bucket is between 100-300mm.
Two fixed plates about the two ends of described pair of guide rods are respectively equipped with, the left side fixed plate is the wall of cylinder bucket, and the center of fixed plate is provided with through hole, is provided with oil sealing in the through hole, and the through hole that catch bar passes on the fixed plate of left side enters the cylinder bucket.
The outer periphery of described piston are provided with oil sealing.Joint between described chamber B and the chamber C is provided with oil sealing.Described low-power motor is an actuating motor, and described speed reducer is planet-gear speed reducer or turbine worm speed reducer.
Be provided with piston in the cylinder bucket of hydraulic system of the present invention, piston is divided into two inner chambers with the cylinder bucket, and in the reciprocating stroke, the cylinder bucket can be exported high pressure and/or low-pressure hydraulic oil to piston continuously in the cylinder bucket, has greatly improved working efficiency thus.This hydraulic system has replaced oil pump, component have been significantly reduced, it is highly stable to work, can accurately control the action of machine, solved the inaccurate drawback of operating accuracy of control valve, do not had oil pump also with regard to having solved fatal oily temperature problem, significantly reduced the powerful motor of driving source, the energy of saving system consumption is more than 50%-90%; Also reduced the use amount of hydraulic oil widely, made more environmental protection of machine, because of having cancelled powerful motor and oil pump, so the noise of this system can reduce 90%.
Description of drawings
Fig. 1 is the structural representation of the hydraulic system of first embodiment of the invention;
Fig. 2 is the structural representation of the hydraulic system of second embodiment of the invention.
Embodiment
Shown in Figure 1 is first embodiment of the invention, that is: can provide the hydraulic system of high pressure or low-pressure hydraulic oil continuously, it comprises successively: low-power motor 1, speed reducer 2, connecting plate 3, shaft joint 4, power transmission 100, and the cylinder bucket 40 that is communicated with fuel tank 27.
Speed reducer 2 links to each other with motor 1, and speed reducer 2 is fixed on a side of connecting plate 3, and shaft joint 4 is located at the opposite side of connecting plate 3, and links to each other with speed reducer 2.
Described power transmission 100 comprises: the ball screw 7 that links to each other with shaft joint 4, slurcocks 20, be fixed on catch bar 10 on the slurcocks 20, be arranged on the ball screw 7 and be fixed on ball nut 8 on the slurcocks 20.Ball screw 7 vertically passes the center of slurcocks 20, and inserts the lumen centers of catch bar 10.The two ends of slurcocks 20 be respectively equipped with linear bearing 9, two linear bearings with a pair of linear guide 6 that ball screw 7 parallels on motion, do linear reciprocating motion thereby drive slurcocks 20.The two ends of described a pair of linear guide 6 are respectively equipped with fixed plate 5,12, and fixing with bolt 13.Fixed plate 12 is the wall of cylinder bucket 40, and the center of fixed plate 12 is provided with through hole, is provided with oil sealing 11 in the through hole.The through hole that catch bar 10 passes on the fixed plate enters cylinder bucket 40.
Motor 1 drives speed reducer 2, and the power of motor 1 amplifies output power with the increase of reduction speed ratio.The power of motor 1 is given to ball screw 7 by speed reducer 2, shaft joint 4, thereby ball screw will rotatablely move and become linear motion and make ball nut 8 do straight reciprocating motion, because of ball nut 8 is fixed on the slurcocks 20, so make slurcocks 20 do straight reciprocating motion.Because of catch bar 10 is fixed on the slurcocks 20, so when slurcocks 20 motion, can drive catch bar 10 and piston 15 is synchronized with the movement.Because of ball screw 7 is located at the center of catch bar 10, so the kinetic energy of low-power motor 1 and speed reducer 2 produces the thrust source of amplifying on catch bar 10.When catch bar 10 passed through the through hole of fixed plate 12, oil sealing 11 separated the chamber C and the external world.
The front end of catch bar 10 is fixed with piston 15, and the inner chamber of piston 15 and cylinder bucket 40 is and is slidingly matched.The outer periphery of piston 15 are provided with oil sealing 16, and piston 15 is divided into chamber A and chamber B with the inner chamber of cylinder bucket 40.One- way valve 25A, 25B link to each other with chamber A, chamber B respectively, and fuel tank 27 links to each other with chamber A, chamber B respectively by one-way valve 19,23.Valve 25A, 25B, 19,23 are one-way valves, and pressure gauge 26,21 shows the oil pressure in chamber A, the chamber B respectively.
When motor turns clockwise, catch bar 10 drives piston 15 and does forward (left) motion, be vacuum in the A of chamber and have certain suction, oil in the fuel tank 27 is inhaled into chamber A by one-way valve 19, oil in the B of chamber is subjected to the active force of piston 15 and becomes high pressure or low-pressure hydraulic oil simultaneously, and exports from one-way valve 25B.Cover the whole stroke of cylinder barrel cavity left when piston 15 after, control low-power motor 1 is rotated counterclockwise it, at this moment piston 15 is done oppositely (to the right) motion, thereby make chamber A output high pressure or low-pressure hydraulic oil, this moment, chamber B produced suction because of the reversing motion of piston 15, and the oil in the fuel tank 27 is inhaled into chamber B by one-way valve 23.As seen, change turning to of motor, can make the chamber A of cylinder bucket and chamber B alternately export high pressure or low-pressure hydraulic oil continuously, for using to hydraulic system.
In this embodiment, the pressure of the hydraulic oil of cylinder bucket 40 output depends on the internal diameter of cylinder bucket, when the internal diameter of cylinder bucket between the 100-300mm, power of motor is during at 2.75N.m, is the low-pressure hydraulic oil of 10-70kg/cm with delivery pressure; When the internal diameter of cylinder bucket 40 between the 30-70mm, power of motor is during at 2.75N.m, is the high-pressure and hydraulic oil of 100-210kg/cm with delivery pressure.
Figure 2 shows that second embodiment of the invention, that is: provide the hydraulic system of high pressure and low-pressure hydraulic oil serially, the same with first embodiment, second embodiment also comprises: low-power motor 1, speed reducer 2, connecting plate 3, shaft joint 4, power transmission, and the cylinder bucket that is communicated with fuel tank 27.The kinetic force of motor 1 and speed reducer 2 acts on the catch bar 10 and produces the thrust source of amplifying.
Different is that cylinder bucket shown in Figure 2 is made up of the low pressure (LP) cylinder bucket 34 and the high-pressure cylinder bucket 14 that link to each other.The joint of high and low cylinder pressure bucket is provided with oil sealing 17, and the internal diameter of high-pressure cylinder bucket 14 is less than the internal diameter of low pressure (LP) cylinder bucket 34.
When catch bar 10 and piston 15 only during forward (left) motion, produce low-pressure hydraulic oil in the chamber B of low pressure (LP) cylinder bucket and the chamber C of high-pressure cylinder bucket 14, respectively by one-way valve 25B, 25C output simultaneously in low pressure (LP) cylinder bucket 34.When entering chamber C when catch bar 10 continuation forward (left) motions and by oil sealing 17, the hydraulic oil of one-way valve 25C output just becomes high-pressure and hydraulic oil.One-way valve 25B still exports low-pressure hydraulic oil.When piston 15 forwards move, form pull of vacuum in the chamber A of low pressure (LP) cylinder bucket, by the hydraulic oil in the one-way valve 19 absorption fuel tanks 27.When piston 14 reverse (to the right) moves, all form vacuum in the chamber B of high-pressure cylinder bucket 14 and low pressure (LP) cylinder bucket 34 and have suction, thus by the hydraulic oil in one-way valve 22, the 23 absorption fuel tanks 27, to replenish hydraulic oil and the preparation action next time that last action loses, chamber A produces low-pressure hydraulic oil because of the reversion effect that is subjected to piston 15 simultaneously, and supplies with hydraulic system by one-way valve 25A output and use.As seen, this system can export high pressure and low-pressure hydraulic oil simultaneously, and the chamber A and the chamber B of low pressure (LP) cylinder bucket 34 can replace continuous output low-pressure hydraulic oil simultaneously.
As mentioned above, pressure in the cylinder bucket depends on the size of its internal diameter, in Fig. 2, the internal diameter of low pressure (LP) cylinder bucket 34 between the 100-300mm, the internal diameter of high-pressure cylinder bucket 14 between the 30-70mm, power of motor is during at 2.75N.m, is that 10-70kg/cm low-pressure hydraulic oil and pressure are the high-pressure and hydraulic oil of 100-210kg/cm with delivery pressure.
In the present invention, low-power motor is single-phase 220 power supplys, so Applicable scope is extensive.And the controllability of low-power motor is very strong, its rotation precision can be controlled in below the 0.01mm, after becoming straight line motion by ball screw, precision improves more greatly, again by control original papers such as electronic rulers, hydraulic oil in the oil pocket just can be controlled oil pump capacity or pressure arbitrarily, can solve the precision problem of legacy system.In addition, described low-power motor can be an actuating motor, and speed reducer can be planet-gear speed reducer or turbine worm speed reducer.
Hydraulic system of the present invention can be used on existing any oil pressure unit, and above-mentioned two embodiments can replace low pressure fuel pump of the prior art, high pressure oil pump, high low pressure combination oil pump.In flow control, the present invention can change the flow that motor speed is controlled output arbitrarily, characteristics according to native system, if existing machine is all used this power source instead, one 100 tons oil hydraulic press for example, prior motor power is three-phase 380V, 7.5kw, and per hour * 0.71 yuan/degree of power consumption 7.5 degree is=5.325 yuan/hour.And employing the present invention, motor is individual event 220V, 0.4W, and per hour * 0.71 yuan/degree of power consumption 0.4 degree is=0.284 yuan/hour, this shows, and the energy that the present invention saves is very considerable.
Claims (8)
1, a kind of hydraulic system is characterized in that, system comprises successively:
Low-power motor (1);
The speed reducer (2) that links to each other with motor (1);
The shaft joint (4) that links to each other with speed reducer (2);
Power transmission, it comprises: the ball screw (7) that links to each other with shaft joint (4), slurcocks (20), be fixed on catch bar (10) on the slurcocks (20), be arranged on ball screw (7) and go up and be fixed on ball nut (8) on the slurcocks (20); Ball screw (7) vertically passes the center of slurcocks (20), and inserts the lumen centers of catch bar (10); The two ends of described slurcocks (20) are respectively equipped with linear bearing (9), and two linear bearings are gone up motion at a pair of linear guide (6) that parallels with ball screw (7);
The sealing cylinder bucket (40,50) that is communicated with fuel tank (27); And
Be fixed on the piston (15) on the catch bar (10), piston is positioned at the cylinder bucket and is with the cylinder barrel cavity and is slidingly matched;
Wherein, the power of motor (1) is passed to slurcocks (20) by speed reducer (2), shaft joint (4), ball screw (7), ball nut (8), drives catch bar (10) and piston (15) and moves in the cylinder bucket; Change turning to of motor, make piston in the cylinder bucket, do linear reciprocating motion; In the stroke that piston moves back and forth in the cylinder bucket, the cylinder bucket is exported high pressure and/or low-pressure hydraulic oil continuously.
2, hydraulic system as claimed in claim 1, it is characterized in that, described piston (15) is fixed on the top of catch bar (10), piston is divided into chamber (A), chamber (B) with the inner chamber of cylinder bucket (40), one-way valve (25A, 25B) links to each other with chamber (A, B) respectively, and fuel tank (27) links to each other with chamber (A, B) respectively by one-way valve (19,23);
During piston (15) positive movement, form vacuum in the chamber (A), oil in the fuel tank (27) is inhaled into chamber (A) by one-way valve (19), and the oil in chamber (B) produces high pressure or low pressure under the effect of piston (15), and by one-way valve (25B) output high pressure or low-pressure hydraulic oil; During piston (15) reversing motion, chamber (A) by one-way valve (25A) output high pressure or low-pressure hydraulic oil, the oil in the fuel tank (27) is inhaled into chamber (B) by one-way valve (23);
When the internal diameter of cylinder bucket (40) is between 30-70mm, output high-pressure and hydraulic oil; When the internal diameter of cylinder bucket (40) is between 100-300mm, the output low-pressure hydraulic oil.
3, hydraulic system as claimed in claim 1 is characterized in that, described cylinder bucket (50) is made up of the low pressure (LP) cylinder bucket (34) and the high-pressure cylinder bucket (14) that link to each other, and the internal diameter of high-pressure cylinder bucket is less than the internal diameter of low pressure (LP) cylinder bucket;
Piston (15) is divided into chamber (A) and chamber (B) with the inner chamber of low pressure (LP) cylinder bucket (34); The inner chamber (C) of catch bar (10) and high-pressure cylinder bucket is and is slidingly matched, and the inner chamber of piston (15) and low pressure (LP) cylinder bucket (34) is and is slidingly matched;
One-way valve (25A, 25B, 25C) links to each other with chamber (A), chamber (B), chamber (C) respectively; Fuel tank (27) links to each other with chamber (A), chamber (B), chamber (C) respectively by one-way valve (19,23,22);
Only in the low pressure (LP) cylinder bucket during positive movement, chamber (B) and chamber (C) is respectively by one-way valve (25B, 25C) output low-pressure hydraulic oil for catch bar (10) and piston (15); When catch bar (10) positive movement enters chamber (C), one-way valve (25C) output high-pressure and hydraulic oil, the oil in the fuel tank (27) is inhaled into chamber (A) by one-way valve (19) simultaneously;
When catch bar and piston reverses direction motion, the oil content in the fuel tank (27) is not inhaled into chamber (C), chamber (B) by one-way valve (22,23); Simultaneously, produce low-pressure hydraulic oil in chamber (A) also by one-way valve (25A) output.
4, hydraulic system as claimed in claim 3 is characterized in that, the internal diameter of described high-pressure cylinder bucket (14) is between 30-70mm, and the internal diameter of low pressure (LP) cylinder bucket (34) is between 100-300mm.
5, hydraulic system as claimed in claim 1, it is characterized in that, the two ends of described pair of guide rods (6) are respectively equipped with fixed plate (5,12), fixed plate (12) is the wall of cylinder bucket, the center of fixed plate is provided with through hole, be provided with oil sealing (11) in the through hole, the through hole that catch bar (10) passes on the fixed plate (12) enters the cylinder bucket.
As each described hydraulic system in the claim 1 to 3, it is characterized in that 6, the outer periphery of described piston (15) are provided with oil sealing (16).
7, hydraulic system as claimed in claim 3 is characterized in that, the joint between described chamber (B) and chamber (C) is provided with oil sealing (17).
8, hydraulic system as claimed in claim 1 is characterized in that, described low-power motor (1) is an actuating motor, and described speed reducer (2) is planet-gear speed reducer or turbine worm speed reducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100024295A CN100371612C (en) | 2005-01-21 | 2005-01-21 | Hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100024295A CN100371612C (en) | 2005-01-21 | 2005-01-21 | Hydraulic system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1807903A true CN1807903A (en) | 2006-07-26 |
| CN100371612C CN100371612C (en) | 2008-02-27 |
Family
ID=36839958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100024295A Expired - Fee Related CN100371612C (en) | 2005-01-21 | 2005-01-21 | Hydraulic system |
Country Status (1)
| Country | Link |
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| CN (1) | CN100371612C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913509A (en) * | 2012-11-23 | 2013-02-06 | 湖北汽车工业学院 | Electrohydraulic pressurizing cylinder and pressing machine equipment with same |
| CN103195397A (en) * | 2013-04-23 | 2013-07-10 | 刘铁军 | Mechanical jack type hydraulic double-well oil pumping machine |
| CN103742352A (en) * | 2014-01-16 | 2014-04-23 | 毛永波 | Screw type piston energy cycle power system capable of converting air pressure into hydraulic pressure |
| CN104712601A (en) * | 2013-12-12 | 2015-06-17 | 上海旭恒精工机械制造有限公司 | Inner-circulation high-speed hydraulic system |
| CN104712616A (en) * | 2013-12-12 | 2015-06-17 | 上海旭恒精工机械制造有限公司 | Internal circulation high-speed hydraulic system, hydraulic platform and hydraulic platform component |
| CN106695865A (en) * | 2016-12-14 | 2017-05-24 | 合肥瑞硕科技有限公司 | Robot joint driving device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2132012Y (en) * | 1992-08-27 | 1993-05-05 | 周文炳 | Electric liquid reciprocating motion device |
| JP2000257550A (en) * | 1999-03-08 | 2000-09-19 | Higashimoto Kikai:Kk | Piston pump for supplying food material or food filling liquid |
| JP4106683B2 (en) * | 2002-07-30 | 2008-06-25 | 株式会社ベイシテイサービス | Fluid suction / discharge device |
| CN1225603C (en) * | 2003-08-19 | 2005-11-02 | 焦让 | Hydraulic reinforcement electric cylinder |
| CN2818870Y (en) * | 2005-01-24 | 2006-09-20 | 蔡寿生 | Hydraulic system |
-
2005
- 2005-01-21 CN CNB2005100024295A patent/CN100371612C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913509A (en) * | 2012-11-23 | 2013-02-06 | 湖北汽车工业学院 | Electrohydraulic pressurizing cylinder and pressing machine equipment with same |
| CN103195397A (en) * | 2013-04-23 | 2013-07-10 | 刘铁军 | Mechanical jack type hydraulic double-well oil pumping machine |
| CN103195397B (en) * | 2013-04-23 | 2016-01-20 | 刘铁军 | Mechanical jack type hydraulic pressure twin-well oil-pumping machine |
| CN104712601A (en) * | 2013-12-12 | 2015-06-17 | 上海旭恒精工机械制造有限公司 | Inner-circulation high-speed hydraulic system |
| CN104712616A (en) * | 2013-12-12 | 2015-06-17 | 上海旭恒精工机械制造有限公司 | Internal circulation high-speed hydraulic system, hydraulic platform and hydraulic platform component |
| WO2015085647A1 (en) * | 2013-12-12 | 2015-06-18 | 上海旭恒精工机械制造有限公司 | Inner-circulation high-speed hydraulic system |
| CN104712616B (en) * | 2013-12-12 | 2017-04-12 | 上海旭恒精工机械制造有限公司 | Internal circulation high-speed hydraulic system, hydraulic platform and hydraulic platform component |
| US10875272B2 (en) | 2013-12-12 | 2020-12-29 | Shanghai Eternal Machinery Co., Ltd. | Inner-circulation high-speed hydraulic system, hydraulic platform, and hydraulic platform assembly |
| CN103742352A (en) * | 2014-01-16 | 2014-04-23 | 毛永波 | Screw type piston energy cycle power system capable of converting air pressure into hydraulic pressure |
| CN103742352B (en) * | 2014-01-16 | 2016-01-13 | 毛永波 | Bolt type piston air pressure turns hydraulic energy source Circulated power system |
| CN106695865A (en) * | 2016-12-14 | 2017-05-24 | 合肥瑞硕科技有限公司 | Robot joint driving device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100371612C (en) | 2008-02-27 |
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Owner name: DONGGUAN HONGQI MACHINERY CO., LTD. Free format text: FORMER OWNER: CAI SHOUSHENG Effective date: 20110524 |
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