CN105370645A - Novel sequential action hydraulic cylinder - Google Patents
Novel sequential action hydraulic cylinder Download PDFInfo
- Publication number
- CN105370645A CN105370645A CN201510945380.0A CN201510945380A CN105370645A CN 105370645 A CN105370645 A CN 105370645A CN 201510945380 A CN201510945380 A CN 201510945380A CN 105370645 A CN105370645 A CN 105370645A
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- Prior art keywords
- oil
- hydraulic cylinder
- piston rod
- fluid port
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/20—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members
- F15B11/205—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members the position of the actuator controlling the fluid flow to the subsequent actuator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1404—Characterised by the construction of the motor unit of the straight-cylinder type in clusters, e.g. multiple cylinders in one block
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Actuator (AREA)
Abstract
Disclosed is a novel sequential action hydraulic cylinder. The novel sequential action hydraulic cylinder is technically characterized by comprising a first hydraulic cylinder and a second hydraulic cylinder, the rear end of the first hydraulic cylinder is provided with an oil pushing supply opening, the front end of the first hydraulic cylinder is provided with an oil retraction supply opening communicated with a second oil cavity, a first oil duct is arranged in a piston rod of the first hydraulic cylinder, an oil hole is formed in the piston rod of the first hydraulic cylinder, a movable sealing block capable of sealing the oil hole is arranged in the second oil cavity, the second oil cavity is communicated with a first oil cavity inside the piston rod of the first hydraulic cylinder through the oil hole, a plugging head is provided with a first oil opening, a second oil opening and a second oil duct, the first oil opening is communicated with the first oil duct, the second oil opening is communicated with the first oil cavity through the second oil duct, the first oil opening is communicated with a third oil opening, the second oil opening is communicated with a fourth oil opening, the third oil opening is located behind a piston rod of the second hydraulic cylinder, and the fourth oil opening is located in the front of the tail of the piston rod of the second hydraulic cylinder. The two piston rods can sequentially act, and meanwhile the novel sequential action hydraulic cylinder has the advantages that the pushing speeds of the piston rods can be kept uniform and consistent and pushing force is large.
Description
Technical field:
The present invention relates to technical field of hydraulic pressure, be specifically related to a kind of novel sequentially-operating oil hydraulic cylinder being applied in agricultural mechanical field.
Background technique:
Complete in the practical application of corresponding actions at multiple Driven by Hydraulic Cylinder workpiece, often need oil hydraulic cylinder to carry out action according to certain sequence of movement.The method of current control multiple oil hydraulic cylinder sequence of movement mainly contains: 1, Stress control: utilize the different cracking pressure such as equilibrium valve, back pressure valve to make oil hydraulic cylinder realize sequentially-operating; 2, direction controlling: utilize relay, position limit switch etc. according to a definite sequence to solenoid valve, make oil hydraulic cylinder action, both this, control mode adds additional outer member, add the complexity of system to a certain extent, reduce reliability, add manufacture and maintenance cost simultaneously, and higher requirement is proposed to the mounting arrangements of system and Environmental Conditions.Especially in the farm machinery application taking tractor as power, not easily adopt automatically controlled mode, be merely able to be reached by the mechanical structure of oil hydraulic cylinder itself allow the object of piston sequentially-operating of multiple oil hydraulic cylinder, and then control by this little novel sequentially-operating oil hydraulic cylinder the break-make that next stage performs oil circuit.
Multi-stage telescopic oil hydraulic cylinder operationally piston or the extended very long stroke of plunger that existing tractor is used, when not working, piston or plunger can be retracted, and it takes up room little.But in the process that all pistons or plunger stretch out, by the sequence of movement of each hydraulic cylinder piston, the speed of stretching out of each piston increases gradually, thrust reduces gradually, and for require to take up room little, push distance and pushing speed remains uniform occasion, existing multi-stage telescopic oil hydraulic cylinder is under ultralong-stroke condition, be difficult to the action pushed continuously and multistage order pushes, and existing multi-stage telescopic oil hydraulic cylinder is merely able to propelling movement workpiece action, uses and has narrow limitation.
Summary of the invention:
The present invention is for overcoming the deficiencies in the prior art, provide a kind of novel sequentially-operating oil hydraulic cylinder, it can make two piston rod actions in order, have simultaneously and can make the advantage that the maintenance of the pushing speed of each piston rod is all even unanimously, thrust is large, under ultralong-stroke, also can realize continuous propelling movement, multistage order pushes the object that workpiece moves, and two workpiece actions can be pushed.
Novel sequentially-operating oil hydraulic cylinder of the present invention, technological scheme adopted for achieving the above object is: comprise the first oil hydraulic cylinder and the second oil hydraulic cylinder, the cylinder body of described first oil hydraulic cylinder is provided with the propelling movement oil-feed port communicated with the cavity of the first oil hydraulic cylinder in rear end, first hydraulic cylinder piston rod is located in the cavity of the first oil hydraulic cylinder by the piston seal seat of its rear end, the internal surface of the first oil hydraulic cylinder is close in the outside of piston seal seat, the second oil pocket is formed between the cavity of the first hydraulic cylinder piston rod and the first oil hydraulic cylinder, the outside that the front end of the first oil hydraulic cylinder is in the first hydraulic cylinder piston rod is provided with stuffing box gland, gap is had between the tail end of stuffing box gland and the cylinder body of the first oil hydraulic cylinder, the outside first oil hydraulic cylinder being in stuffing box gland tail end offers the retraction oil-feed port communicated with the second oil pocket, the front first hydraulic cylinder piston rod being in piston seal seat offers oilhole, the front that first hydraulic cylinder piston rod closes on oilhole forms dogging shoulder, be in second oil pocket to be provided with between dogging shoulder and piston seal seat and mobilely seal block, on piston seal seat, level offers the 3rd oil duct communicated with the cavity of the first oil hydraulic cylinder, the internal cavity center of the first hydraulic cylinder piston rod is provided with the first oil duct, the rear end of the first oil duct communicates with the cavity of the first oil hydraulic cylinder through the ear end face of the first hydraulic cylinder piston rod, the cavity formed between first oil duct and the first hydraulic cylinder piston rod is the first oil pocket, the block head of the first hydraulic cylinder piston rod front end offers the first hydraulic fluid port, second hydraulic fluid port and the second oil duct, first hydraulic fluid port communicates with the first oil duct, second hydraulic fluid port is communicated with the first oil pocket by the second oil duct, first hydraulic fluid port is communicated in the 3rd hydraulic fluid port on the cylinder body of the second oil hydraulic cylinder by the first oil pipe, second hydraulic fluid port is communicated in the 4th hydraulic fluid port on the cylinder body of the second oil hydraulic cylinder by the second oil pipe, 3rd hydraulic fluid port is in the rear of the second hydraulic cylinder piston rod in the second hydraulic cylinder body, 4th hydraulic fluid port is in the front of the second hydraulic cylinder piston rod afterbody.
As a further improvement on the present invention, the both sides up and down of described first hydraulic cylinder body rear end internal surface are formed towards the chamfering of 30 ° of the 3rd oil duct, be convenient to push the fuel feeding of oil-feed port and enter the 3rd oil duct, then flow in the second oil pocket through the 3rd oil duct and promote mobile envelope block and move forward stop oilhole.
As a further improvement on the present invention, mobile envelope block is provided with in described second oil pocket, the front that first hydraulic cylinder piston rod closes on oilhole forms dogging shoulder, and mobile envelope block is between dogging shoulder and piston seal seat, and on piston seal seat, level offers the 3rd oil duct communicated with the cavity of the first oil hydraulic cylinder.Push in the process that the first hydraulic cylinder piston rod and the second hydraulic cylinder piston rod stretch out, by mobile envelope block shutoff oilhole, prevent the hydraulic oil in the second hydraulic cylinder body from carrying out oil return, the resistance simultaneously also avoiding the oil return because of the second oil hydraulic cylinder to cause the first hydraulic cylinder piston rod stretching out.
As a further improvement on the present invention, described stuffing box gland is that outer surface is by the taper sheath narrowed gradually after forward direction, thus make there is gap between the cylinder body of the tail end of stuffing box gland and the first oil hydraulic cylinder, and then hydraulic oil is entered in the second oil pocket by retraction oil-feed port, thus the first hydraulic cylinder piston rod and the second hydraulic cylinder piston rod are retracted.
The invention has the beneficial effects as follows: the present invention by arranging mobile envelope block in the second oil pocket, when pushing, make the hydraulic oil in the second oil hydraulic cylinder cannot oil return and form the resistance stretched out the second hydraulic cylinder piston rod by the shutoff of mobile envelope block to oilhole, until the first hydraulic cylinder piston rod reach its cylinder body foremost time, mobile envelope block moves backward under the extruding of stuffing box gland tail end, hydraulic oil in second oil hydraulic cylinder just carries out oil return and removes the resistance stretched out the second hydraulic cylinder piston rod, thus allow the second hydraulic cylinder piston rod stretch out again after the first hydraulic cylinder piston rod stretches out, namely the order achieving two piston rods is stretched out, when retracting, the hydraulic oil part promotion mobile envelope block entered in the second oil pocket through retraction oil-feed port is mobile to promote the mobile retraction backward of the first hydraulic cylinder piston rod backward, oilhole is exposed because mobile envelope block moves backward, another part hydraulic oil entered in the second oil pocket finally flows in the second oil hydraulic cylinder by oilhole, promote the second hydraulic cylinder piston rod to move backward, now the piston rod of two oil hydraulic cylinders completes retraction according to the size of setting resistance, the first retraction that resistance is little, retract when resistance is equal simultaneously, thus make two piston rods realize retracting or order retraction by the requirement of practical application simultaneously.The present invention, through designing and calculating, can reach the object that speed that two piston rods are stretched out is basically identical, and makes the thrust that each piston rod keeps enough large.
The present invention can the position of flexible arrangement two oil hydraulic cylinders according to control overflow, be specially: the cylinder barrel of the second oil hydraulic cylinder can be fixed on the piston rod of the first oil hydraulic cylinder, both position relationships can be on the same line, push same workpiece by this kind of mode to travel forward, the propelling movement of ultralong-stroke can be realized, or on the workpiece that the piston rod that the cylinder barrel of the second oil hydraulic cylinder is fixed on the first oil hydraulic cylinder is pushed, both can be arranged above and below, also can left-right situs, overlapping according to all right front and rear part of special case, at the end of the first oil hydraulic cylinder pushes, push another workpiece again by the second oil hydraulic cylinder to travel forward, thus the propelling movement realized to the Long travel of two workpieces in the confined space, such as, when pushing material, first pushing one by the first oil hydraulic cylinder is with the base plate of push pedal to move forward, when base plate reaches range, the push pedal pushed on base plate by the second oil hydraulic cylinder again continues to move forward, thus realize the object of the long distance propelling movement to two workpieces.
On the whole, the present invention have take up room when not working little, during work, piston rod can stretch out the advantage of very Long travel, under ultralong-stroke condition, the object that two piston rod realization orders push, order is retracted or retracted simultaneously can be made, also can push two workpieces to run, use more flexible, applied widely.In addition, because the present invention adopts pure mechanical structure to realize the control of sequence of movement, can avoid causing because of the disorder of system electrical equipment or handling fault the situation that start-stop device and equipment interfere, system layout is optimized, reliability improves greatly, each oil hydraulic cylinder in cylinder hydraulic system can be made in strict accordance with predetermined order successively action, and comparatively adopt the novel sequentially-operating oil hydraulic cylinder of one-way valve group technique to run more stable, reliable.
Accompanying drawing illustrates:
Fig. 1 is structural representation of the present invention.
Embodiment:
With reference to Fig. 1, this novel sequentially-operating oil hydraulic cylinder, comprise the first oil hydraulic cylinder 4 and the second oil hydraulic cylinder 10, the cylinder body of described first oil hydraulic cylinder 4 is provided with the propelling movement oil-feed port 15 communicated with the cavity of the first oil hydraulic cylinder 4 in rear end, first hydraulic cylinder piston rod 5 is located in the cavity of the first oil hydraulic cylinder 4 by the piston seal seat 1 of its rear end, the internal surface of the first oil hydraulic cylinder 4 is close in the outside of piston seal seat 1, the second oil pocket 8 is formed between first hydraulic cylinder piston rod 5 and the cavity of the first oil hydraulic cylinder 4, the outside that the front end of the first oil hydraulic cylinder 4 is in the first hydraulic cylinder piston rod 5 is provided with stuffing box gland 13, described stuffing box gland 13 is that outer surface is by the taper sheath narrowed gradually after forward direction, thus make there is gap between the cylinder body of the tail end of stuffing box gland 13 and the first oil hydraulic cylinder 4, the outside first oil hydraulic cylinder 4 being in stuffing box gland 13 tail end offers the retraction oil-feed port 16 communicated with the second oil pocket 8, the front first hydraulic cylinder piston rod 5 being in piston seal seat 1 offers oilhole 3, the front that first hydraulic cylinder piston rod 5 closes on oilhole 3 forms dogging shoulder, be in second oil pocket 8 to be provided with between dogging shoulder and piston seal seat 1 and mobilely seal block 2, on piston seal seat 1, level offers the 3rd oil duct 14 communicated with the cavity of the first oil hydraulic cylinder 4, mobile envelope block 2 is provided with in described second oil pocket 8, the front that first hydraulic cylinder piston rod 5 closes on oilhole 3 forms dogging shoulder, mobile envelope block 2 is between dogging shoulder and piston seal seat 1, on piston seal seat 1, level offers the 3rd oil duct 14 communicated with the cavity of the first oil hydraulic cylinder 4, the both sides up and down of the first oil hydraulic cylinder 4 rear end of the cylinder block internal surface are formed towards the chamfering of 30 ° of the 3rd oil duct 14.The internal cavity center of the first hydraulic cylinder piston rod 5 is provided with the first oil duct 6, the rear end of the first oil duct 6 communicates with the cavity of the first oil hydraulic cylinder 4 through the ear end face of the first hydraulic cylinder piston rod 5, the cavity formed between first oil duct 6 and the first hydraulic cylinder piston rod 5 is the first oil pocket 7, the block head 22 of the first hydraulic cylinder piston rod 5 front end offers the first hydraulic fluid port 17, second hydraulic fluid port 18 and the second oil duct 9, first hydraulic fluid port 17 communicates with the first oil duct 6, second hydraulic fluid port 18 is communicated with the first oil pocket 7 by the second oil duct 9, first hydraulic fluid port 17 is communicated in the 3rd hydraulic fluid port 19 on the cylinder body of the second oil hydraulic cylinder 10 by the first oil pipe 23, second hydraulic fluid port 18 is communicated in the 4th hydraulic fluid port 20 on the cylinder body of the second oil hydraulic cylinder 10 by the second oil pipe 12, 3rd hydraulic fluid port 19 is in the rear of the second hydraulic cylinder piston rod 11 in the second oil hydraulic cylinder 10 cylinder body, 4th hydraulic fluid port 20 is in the front of the second hydraulic cylinder piston rod 11 afterbody.
Working procedure of the present invention is:
Push the first hydraulic cylinder piston rod 5 and the second hydraulic cylinder piston rod 11 order when stretching out, hydraulic oil enters in the cavity of the first oil hydraulic cylinder 4 by pushing oil-feed port 15, to the rear end of the first hydraulic cylinder piston rod 5 and piston seal seat 1 pressure applied forward, the first hydraulic cylinder piston rod 5 is moved forward to stretch out, most of hydraulic oil enters in the first oil duct 6 simultaneously, fraction hydraulic oil flows to mobile envelope block 2 through the 3rd oil duct 14 and promotes mobile envelope block 2 and moves ahead and block oilhole 3, the hydraulic oil entering the first oil duct 6 promotes the second hydraulic cylinder piston rod 11 by the first hydraulic fluid port 17 when flowing to the front end of the first oil duct 6 and moves ahead in the cylinder body that the first oil pipe 23 and the 3rd hydraulic fluid port 19 enter the second oil hydraulic cylinder 10, block because oilhole 3 has been moved envelope block 2, being in hydraulic oil on front side of the second hydraulic cylinder piston rod 11 tail end in second oil hydraulic cylinder 10 cannot oil return, thus formation resistance is stretched out to the second hydraulic cylinder piston rod 11, when the first hydraulic cylinder piston rod 5 moves to the front end of the first oil hydraulic cylinder 4 cylinder body, mobile envelope block 2 is mobile backward under the extruding of stuffing box gland 13 to be exposed oilhole 3, hydraulic oil before second hydraulic cylinder piston rod 11 tail end is successively through the 4th hydraulic fluid port 20, second oil circuit 12, second hydraulic fluid port 18, second oil duct 9, first oil pocket 7, oilhole 3 is back in the second oil pocket 8, eliminate the resistance that the second hydraulic cylinder piston rod 11 is stretched out, now promote the second hydraulic cylinder piston rod 11 through the 3rd hydraulic fluid port 19 hydraulic oil entered in the second oil hydraulic cylinder 10 to stretch out, thus the order realizing the first hydraulic cylinder piston rod 5 and the second hydraulic cylinder piston rod 11 is stretched out.
When the first hydraulic cylinder piston rod 5 and the second hydraulic cylinder piston rod 11 are retracted, hydraulic oil enters in the cavity of the first oil hydraulic cylinder 4 by oil-feed port 16 of retracting, promote mobile envelope block 2 to move backward, and then promotion piston seal seat 1 makes the first hydraulic cylinder piston rod 5 move backward, hydraulic oil enters in the first oil pocket 7 through oilhole 3 simultaneously, again by the first oil pocket 7 successively through the second oil duct 9, second hydraulic fluid port 18, second oil pipe 12, 4th hydraulic fluid port 20 enters in the cylinder body of the second oil hydraulic cylinder 10, promote the second hydraulic cylinder piston rod 11 to move backward, now two hydraulic cylinder piston rods complete retraction according to the size of setting resistance, the first retraction that resistance is little, retract when resistance is equal simultaneously.
Claims (3)
1. a novel sequentially-operating oil hydraulic cylinder, it is characterized in that: comprise the first oil hydraulic cylinder (4) and the second oil hydraulic cylinder (10), the cylinder body of described first oil hydraulic cylinder (4) is provided with the propelling movement oil-feed port (15) communicated with the cavity of the first oil hydraulic cylinder (4) in rear end, first hydraulic cylinder piston rod (5) is located in the cavity of the first oil hydraulic cylinder (4) by the piston seal seat (1) of its rear end, the internal surface of the first oil hydraulic cylinder (4) is close in the outside of piston seal seat (1), the second oil pocket (8) is formed between the cavity of the first hydraulic cylinder piston rod (5) and the first oil hydraulic cylinder (4), the outside that the front end of the first oil hydraulic cylinder (4) is in the first hydraulic cylinder piston rod (5) is provided with stuffing box gland (13), gap is had between the tail end of stuffing box gland (13) and the cylinder body of the first oil hydraulic cylinder (4), the outside first oil hydraulic cylinder (4) being in stuffing box gland (13) tail end offers the retraction oil-feed port (16) communicated with the second oil pocket (8), the front first hydraulic cylinder piston rod (5) being in piston seal seat (1) offers oilhole (3), the front that first hydraulic cylinder piston rod (5) closes on oilhole (3) forms dogging shoulder, be in second oil pocket (8) to be provided with between dogging shoulder and piston seal seat (1) and mobilely seal block (2), the upper level of piston seal seat (1) offers the 3rd oil duct (14) communicated with the cavity of the first oil hydraulic cylinder (4), the internal cavity center of the first hydraulic cylinder piston rod (5) is provided with the first oil duct (6), the rear end of the first oil duct (6) communicates with the cavity of the first oil hydraulic cylinder (4) through the ear end face of the first hydraulic cylinder piston rod (5), the cavity formed between first oil duct (6) and the first hydraulic cylinder piston rod (5) is the first oil pocket (7), the block head (22) of the first hydraulic cylinder piston rod (5) front end offers the first hydraulic fluid port (17), second hydraulic fluid port (18) and the second oil duct (9), first hydraulic fluid port (17) communicates with the first oil duct (6), second hydraulic fluid port (18) is communicated with the first oil pocket (7) by the second oil duct (9), first hydraulic fluid port (17) is communicated in the 3rd hydraulic fluid port (19) on the cylinder body of the second oil hydraulic cylinder (10) by the first oil pipe (23), second hydraulic fluid port (18) is communicated in the 4th hydraulic fluid port (20) on the cylinder body of the second oil hydraulic cylinder (10) by the second oil pipe (12), 3rd hydraulic fluid port (19) is in the rear of the second hydraulic cylinder piston rod (11) in the second oil hydraulic cylinder (10) cylinder body, 4th hydraulic fluid port (20) is in the front of the second hydraulic cylinder piston rod (11) afterbody.
2. a kind of novel sequentially-operating oil hydraulic cylinder as claimed in claim 1, is characterized in that: the both sides up and down of described first oil hydraulic cylinder (4) rear end of the cylinder block internal surface are formed towards the chamfering of 30 ° of the 3rd oil duct (14).
3. a kind of novel sequentially-operating oil hydraulic cylinder as claimed in claim 1, is characterized in that: described stuffing box gland (13) is for outer surface is by the taper sheath narrowed gradually after forward direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510945380.0A CN105370645B (en) | 2015-12-14 | 2015-12-14 | Novel sequential action hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510945380.0A CN105370645B (en) | 2015-12-14 | 2015-12-14 | Novel sequential action hydraulic cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN105370645A true CN105370645A (en) | 2016-03-02 |
| CN105370645B CN105370645B (en) | 2017-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510945380.0A Active CN105370645B (en) | 2015-12-14 | 2015-12-14 | Novel sequential action hydraulic cylinder |
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| Country | Link |
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| CN (1) | CN105370645B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111503088A (en) * | 2020-05-07 | 2020-08-07 | 山东万通液压股份有限公司 | Single-telescopic thrust multiplication hydraulic cylinder |
| CN112627662A (en) * | 2020-12-28 | 2021-04-09 | 北京北方华创微电子装备有限公司 | Semiconductor process equipment and door opening mechanism |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5868507A (en) * | 1981-10-20 | 1983-04-23 | Tadano Tekkosho:Kk | Coupling system for plural hydraulic cylinder |
| JPH10252709A (en) * | 1997-03-17 | 1998-09-22 | Tadano Eng:Kk | Hydraulic expansion device and operation method therefor |
| EP1270494A1 (en) * | 2001-06-18 | 2003-01-02 | FASSI GRU IDRAULICHE S.p.A. | Extension device for telescopic booms of hydraulic cranes |
| CN102518617A (en) * | 2011-12-21 | 2012-06-27 | 湖南特力液压有限公司 | Travel valve, sequential action type combination hydraulic cylinder and hydraulic equipment |
| CN202900830U (en) * | 2012-09-21 | 2013-04-24 | 张海平 | Sequence hydraulic cylinder |
| CN203441860U (en) * | 2013-07-30 | 2014-02-19 | 江苏建筑职业技术学院 | Dual-ejector-rod composite hydraulic cylinder capable of realizing sequential actions |
| CN205207304U (en) * | 2015-12-14 | 2016-05-04 | 黑龙江省农业机械工程科学研究院 | Novel sequence action pneumatic cylinder |
-
2015
- 2015-12-14 CN CN201510945380.0A patent/CN105370645B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5868507A (en) * | 1981-10-20 | 1983-04-23 | Tadano Tekkosho:Kk | Coupling system for plural hydraulic cylinder |
| JPH10252709A (en) * | 1997-03-17 | 1998-09-22 | Tadano Eng:Kk | Hydraulic expansion device and operation method therefor |
| EP1270494A1 (en) * | 2001-06-18 | 2003-01-02 | FASSI GRU IDRAULICHE S.p.A. | Extension device for telescopic booms of hydraulic cranes |
| CN102518617A (en) * | 2011-12-21 | 2012-06-27 | 湖南特力液压有限公司 | Travel valve, sequential action type combination hydraulic cylinder and hydraulic equipment |
| CN202900830U (en) * | 2012-09-21 | 2013-04-24 | 张海平 | Sequence hydraulic cylinder |
| CN203441860U (en) * | 2013-07-30 | 2014-02-19 | 江苏建筑职业技术学院 | Dual-ejector-rod composite hydraulic cylinder capable of realizing sequential actions |
| CN205207304U (en) * | 2015-12-14 | 2016-05-04 | 黑龙江省农业机械工程科学研究院 | Novel sequence action pneumatic cylinder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111503088A (en) * | 2020-05-07 | 2020-08-07 | 山东万通液压股份有限公司 | Single-telescopic thrust multiplication hydraulic cylinder |
| CN112627662A (en) * | 2020-12-28 | 2021-04-09 | 北京北方华创微电子装备有限公司 | Semiconductor process equipment and door opening mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105370645B (en) | 2017-04-19 |
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Effective date of registration: 20220712 Address after: 150081 Heilongjiang Province, Harbin city Nangang District haping Road No. 156 Patentee after: Heilongjiang wunongzhuang Technology Co.,Ltd. Patentee after: Heilongjiang Academy of Agricultural Machinery Engineering Address before: 150081 Heilongjiang Province, Harbin city Nangang District haping Road No. 156 Patentee before: Heilongjiang Province Research Academy of Agricultural Machinery Engineering |
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