CN112431807A - Swing hydraulic cylinder in electro-hydraulic actuator - Google Patents
Swing hydraulic cylinder in electro-hydraulic actuator Download PDFInfo
- Publication number
- CN112431807A CN112431807A CN202011426523.4A CN202011426523A CN112431807A CN 112431807 A CN112431807 A CN 112431807A CN 202011426523 A CN202011426523 A CN 202011426523A CN 112431807 A CN112431807 A CN 112431807A
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- cylinder
- hole
- piston
- rack
- oil
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Links
- 238000013016 damping Methods 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 15
- 230000003139 buffering effect Effects 0.000 claims description 14
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000007790 scraping Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910001141 Ductile iron Inorganic materials 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241000227287 Elliottia pyroliflora Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007847 structural defect Effects 0.000 description 1
Images
Classifications
-
- 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
- F15B15/12—Characterised by the construction of the motor unit of the oscillating-vane or curved-cylinder type
-
- 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
- F15B15/20—Other details, e.g. assembly with regulating devices
-
- 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
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
- F15B15/222—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having a piston with a piston extension or piston recess which throttles the main fluid outlet as the piston approaches its end position
-
- 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
- F15B2215/00—Fluid-actuated devices for displacing a member from one position to another
- F15B2215/30—Constructional details thereof
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a swing hydraulic cylinder in an electro-hydraulic actuator, which comprises: the gear box is internally provided with a gear with a keyhole, two sides of the gear box are respectively provided with a cylinder barrel, each cylinder barrel is internally provided with two pistons and two racks, the two racks are meshed with the gear, two ends of each cylinder barrel are respectively provided with an oil hole, the back of each rack is provided with a supporting bearing bush, the bottoms of two ends of an inner cavity of each cylinder barrel are respectively provided with a buffer sleeve, the outer end of each piston is provided with a buffer boss, each buffer sleeve is provided with a damping hole and a smooth hole, and the rack and the two pistons in each cylinder barrel are not fixedly connected; a dirt containing ring is arranged on the side wall of each piston; the surface of the outer ring of the supporting bearing bush is provided with a blind hole, the side wall of the cylinder barrel is provided with a countersunk threaded hole, an adjusting bolt is screwed in the countersunk threaded hole, and the inner end of the adjusting bolt is inserted into the blind hole; two guide rings are embedded in each cylinder barrel. The swing hydraulic cylinder has long service life.
Description
Technical Field
The invention relates to the field of electro-hydraulic actuators, in particular to a swing hydraulic cylinder in an electro-hydraulic actuator.
Background
The principle of the swing hydraulic cylinder is that reciprocating motion of a piston drives a gear through a rack to be converted into forward and reverse swing rotation of the gear, and meanwhile, thrust of the piston is converted into output torque of the gear. However, the conventional swing hydraulic cylinder generally has structural defects, so that the service life of the swing hydraulic cylinder is not long.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the swing hydraulic cylinder in the electro-hydraulic actuator has long service life.
In order to solve the problems, the technical scheme adopted by the invention is as follows: an oscillating hydraulic cylinder in an electro-hydraulic actuator, comprising: a gear box, a gear with a keyhole is arranged in the gear box, the keyhole can be inserted by a valve shaft, so that the gear can control the valve by driving the valve shaft to rotate, a cylinder is respectively arranged at the upper part and the lower part of the gear box, the middle parts of the two cylinders are communicated with the gear box, each cylinder is provided with two pistons and a cylindrical rack positioned between the two pistons, each piston is provided with a sealing ring capable of sealing a gap between the piston and the cylinder, the two racks are respectively engaged with the gear through the communication part of the cylinder and the gear box, two ends of each cylinder are respectively provided with an oil hole communicated with an inner cavity of the cylinder, pressure oil can drive the piston at the end of the cylinder to push the rack and the other piston to move towards the other end of the cylinder after being introduced into one end of the cylinder through the oil holes, so that the rack can drive the gear to rotate, Another piston can be with the oilhole extrusion cylinder of the oil in the cylinder other end through its place end, two oilholes on every cylinder all lead to oil in turn like this and make two racks do the reciprocating motion opposite in direction after just can drive gear positive and negative rotation, all be provided with a support axle bush between the back of every rack and cylinder, support the axle bush and adjust the meshing clearance between rack and the gear through pressing the rack, its characterized in that: the bottom of two ends of each cylinder barrel cavity is provided with a buffer sleeve facing a piston, the outer ends of two pistons in each cylinder barrel are respectively provided with a buffer boss facing the buffer sleeve at the end where the two pistons are located, each buffer boss is formed by coaxially connecting a circular table section and a cylindrical section located on the inner side of the circular table section, the small end of the circular table section is located on the outer side, the diameter of the cylindrical section is equal to the diameter of the large end of the circular table section, the cylindrical section is fixed with the piston, each buffer sleeve is provided with a damping hole and an open flow hole, one port of the damping hole is located on the end face of the buffer sleeve and communicated with the cylinder barrel cavity, the other port of the damping hole is communicated with an oil hole at the end of the damping hole through a pipeline with a one-way throttle valve, the one-way throttle valve can throttle oil flowing from the damping hole to the oil hole, and one port of the open flow hole is located on the inner ring, the other port of the smooth flow hole is communicated with the oil hole at the end of the smooth flow hole through a pipeline, an inner ring sealing ring positioned at the inner side of the smooth flow hole is arranged on the side wall of the inner ring of each buffer sleeve, when the piston moves to the end part of the cylinder barrel, the buffer boss on the piston can be inserted into the corresponding buffer sleeve, so that the circular platform section on the buffer boss can gradually reduce the through-flow section of the inner ring of the buffer sleeve along with the insertion, thereby reducing the oil flowing out from the smooth flow hole, playing a role of buffering the speed of the piston, when the cylindrical section on the buffer boss is inserted into the buffer sleeve, the inner ring sealing ring can seal the gap between the cylindrical section and the buffer sleeve, so that the oil cannot flow out through the smooth flow hole, and the oil can only flow out from the damping hole, thus limiting the flow of the oil through the one-way throttle valve and playing a role of buffering the speed of the, the speed of the piston speed reduction can be adjusted; the rack in each cylinder barrel and the two pistons are not fixedly connected; an annular accommodating groove is formed in the side wall of each piston, a dirt accommodating ring for cleaning impurities is placed in each accommodating groove, and the dirt accommodating ring is located on the inner side of a sealing ring on the piston; the support bearing bush is an arc-shaped spherical iron bush, a blind hole is formed in the surface of the outer ring of the support bearing bush, a countersunk threaded hole is formed in the side wall of the cylinder barrel, an adjusting bolt is screwed into the countersunk threaded hole from outside to inside, and the inner end of the adjusting bolt is inserted into the blind hole and presses the support bearing bush; two guide rings which are sleeved on the rack and are respectively positioned on two sides of the gear are embedded in each cylinder barrel, the guide rings can guide the rack and can prevent the end part of the rack from scraping the inner wall of the cylinder barrel when the rack is flexibly deformed.
Further, the swing hydraulic cylinder in the electro-hydraulic actuator, wherein: the one-way throttle valve is provided with a manual knob positioned on the outer side, and the throttle opening of the one-way throttle valve can be conveniently adjusted by rotating the manual knob.
Further, the swing hydraulic cylinder in the electro-hydraulic actuator, wherein: the width of the guide ring is not less than twice the pitch on the rack.
Further, the swing hydraulic cylinder in the electro-hydraulic actuator, wherein: the blind hole is located at the center of the supporting bearing bush.
Further, the swing hydraulic cylinder in the electro-hydraulic actuator, wherein: and a sealing ring is arranged between the buffer sleeve and the side wall of the cylinder barrel.
The invention has the advantages that: the swing hydraulic cylinder can be buffered when the piston moves to the end part of the cylinder barrel due to the addition of the adjustable buffer mechanism, so that the service life of the swing hydraulic cylinder can be prolonged, and the speed of the piston which is reduced when the piston is buffered can be adjusted, so that the swing hydraulic cylinder can be more suitable for occasions with high-speed rotation and working conditions with adjustable end buffering requirements, in addition, the swing hydraulic cylinder is further greatly prolonged because the rack and the two pistons are not fixedly connected, a dirt receiving ring is arranged on the piston, the support bearing bush is arranged as a spherical iron bush, and an adjusting bolt and a guide ring are additionally arranged.
Drawings
Fig. 1 is a schematic structural diagram of a swing hydraulic cylinder in an electro-hydraulic actuator according to the present invention.
Detailed Description
The present invention will be described in further detail below with reference to specific embodiments and the attached drawings.
As shown in fig. 1, an oscillating hydraulic cylinder in an electro-hydraulic actuator includes: a gear box 1, a gear 2 with a keyhole is arranged in the gear box 1, the keyhole can be inserted by a valve shaft, so that the gear 2 can control the valve by driving the valve shaft to rotate, a cylinder 3 is respectively arranged at the upper part and the lower part of the gear box 1, the middle parts of the two cylinders 3 are communicated with the gear box 1, two pistons 4 and a cylindrical rack 5 positioned between the two pistons 4 are arranged in each cylinder 3, a sealing ring capable of sealing a gap between the piston 4 and the cylinder 3 is arranged on each piston 4, the two racks 5 are engaged with the gear 2 for transmission through the communication part of the cylinder 3 and the gear box 1, oil holes 6 communicated with the inner cavity of the cylinder 3 are respectively arranged at the two ends of each cylinder 3, pressure oil is introduced into one end of the cylinder 3 through the oil holes 6 and then can drive the piston 4 at the end to push the rack 5 and the other piston 4 to move towards the other end of the cylinder 3, so that the rack 5 can drive the gear 2 to rotate, the other piston 4 can press oil in the other end of the cylinder 3 out of the cylinder 3 through the oil hole 6 in the end where the other piston is located, thus the two oil holes 6 on each cylinder 3 are alternately filled with oil to drive the gear 2 to rotate forward and backward after the two racks 5 do reciprocating motion in opposite directions, a supporting bearing bush 7 is arranged between the back surface of each rack 5 and the cylinder 3, the supporting bearing bush 7 adjusts the meshing gap between the rack 5 and the gear 2 by pressing the rack 5, the bottom parts of the two ends of the inner cavity of each cylinder 3 are respectively provided with a buffer sleeve 7 facing the piston 4, the outer ends of the two pistons 4 in each cylinder 3 are respectively provided with a buffer boss 8 facing the buffer sleeve 7 in the end where the two pistons are located, each buffer boss 8 is formed by coaxially connecting a circular platform section 81 and a cylindrical section 82 located on the inner side of the circular platform section, the small end of the circular platform section 81 is positioned at the outer side, the diameter of the cylindrical section 82 is equal to the diameter of the large end of the circular platform section 81, the cylindrical section 82 is fixed with the piston 4, each buffer sleeve 7 is provided with a damping hole 71 and an open flow hole 72, one port of the damping hole 71 is positioned on the end surface of the buffer sleeve 7 and is communicated with the inner cavity of the cylinder barrel 3, the other port of the damping hole 71 is communicated with the oil hole 6 at the end of the damping hole through a pipeline with a one-way throttle valve 9, the one-way throttle valve 9 can throttle oil flowing from the damping hole 71 to the oil hole 6, one port of the open flow hole 72 is positioned on the inner ring side wall of the buffer sleeve 7 and is communicated with the inner cavity of the cylinder barrel 3, the other port of the open flow hole 72 is communicated with the oil hole 6 at the end of the open flow hole through a pipeline, an inner ring sealing ring 73 positioned at the inner ring of the open flow hole 72, the buffering boss 8 on the piston 4 can be inserted into the corresponding buffering sleeve 7, so that the circular platform section 81 on the buffering boss 8 can gradually reduce the through-flow section of the inner ring of the buffering sleeve 7 along with the insertion, and the oil flowing out of the smooth flow hole 72 can be reduced, so that the buffering effect of reducing the speed of the piston 4 can be achieved, when the cylindrical section 82 on the buffering boss 8 is inserted into the buffering sleeve 7, the inner sealing ring 73 can seal the gap between the cylindrical section 82 and the buffering sleeve 7, so that the oil cannot flow out through the smooth flow hole 72, and the oil can only flow out of the damping hole 71, so that the flow of the oil can be limited through the one-way throttle valve 9, the buffering effect of reducing the speed of the piston 4 can be achieved, and the opening throttling of the one-way throttle valve 9 can be adjusted, so that the speed of the piston 4 can be reduced, namely;
the rack 5 and the two pistons 4 in each cylinder barrel 3 are not fixedly connected; an annular accommodating groove is formed in the side wall of each piston 4, a dirt accommodating ring 642 for cleaning impurities is placed in each accommodating groove, and the dirt accommodating ring 642 is located on the inner side of a sealing ring on the piston 4; the supporting bearing bush 7 is an arc-shaped ball iron bush, the ball iron has good self-lubricating performance and higher hardness than copper, a blind hole 671 is arranged on the surface of the outer ring of the supporting bearing bush 7, the blind hole 671 is positioned at the center of the supporting bearing bush 7, a countersunk head threaded hole 631 is arranged on the side wall of the cylinder barrel 3, an adjusting bolt 632 is screwed into the countersunk head threaded hole 631 from outside to inside, and the inner end of the adjusting bolt 632 is inserted into the blind hole 671 and presses the supporting bearing bush 7; two guide rings 68 which are sleeved on the rack 5 and are respectively positioned at two sides of the gear 2 are embedded in each cylinder 3, and the guide rings 68 can guide the rack 5 and can prevent the end part of the rack 5 from scraping the inner wall of the cylinder 3 when the rack 5 is flexibly deformed.
In the present embodiment, the flow opening hole 72 is an L-shaped hole, which is relatively easy to machine. The one-way throttle valve 9 is provided with a manual knob 91 positioned at the outer side, and the throttle opening of the one-way throttle valve 9 can be conveniently adjusted by rotating the manual knob 91. And a sealing ring is arranged between the buffer sleeve 7 and the side wall of the cylinder barrel 3, so that oil leakage can be prevented.
In this embodiment, the guide ring 68 is a ductile iron ring, and the ductile iron has good self-lubricating property and high hardness. The width a of the guide ring 68 is not less than twice the pitch on the toothed rack 5, which is provided for better guidance.
The gear can provide a large radial force for the rack in the rotating process, the rack and the two pistons in the conventional swing hydraulic cylinder are usually connected and fixed, so that the radial force can be transmitted to the pistons, the sealing element on the pistons can be quickly abraded, the function of the oil cylinder is failed, and in order to avoid the problem, the piston and the rack are not connected and fixed, the piston and the rack are integrally separated, the sealing structure of the piston is not influenced when the rack is subjected to the radial force, and the design can prolong the service life of the sealing element, so that the service life of the swing hydraulic cylinder can be prolonged.
Scrap iron is generated due to tooth surface friction between the gear and the rack, the scrap iron is brought into the cylinder barrel through the rack and falls on the inner wall of the cylinder barrel, and when a piston passes through the position, the damage of a piston sealing piece or the pulling damage of the inner wall of the cylinder barrel can be caused, so that the failure of the swing hydraulic cylinder is caused.
The supporting bearing bush in the conventional swing hydraulic cylinder is usually a copper bush, copper has a self-lubricating function but is soft, the requirement on the roughness of a rack is high, if the roughness of the rack is high, the abrasion of the supporting bearing bush is aggravated, so that the supporting bearing bush cannot well press the rack, the meshing gap between the rack and a gear is enlarged, the tooth surfaces of the rack and the gear are seriously abraded, and the service life of the swing hydraulic cylinder is influenced; when the supporting bearing bush is worn, the supporting bearing bush can be attached to the pressing rack again by rotating the adjusting bolt downwards.
The gear can apply a large radial force to the rack in the rotating process, so that the rack can generate flexible deformation, after the flexible deformation, two ends of the rack can easily scrape the inner wall of the cylinder barrel, and further the swing hydraulic cylinder is out of work.
Claims (5)
1. An oscillating hydraulic cylinder in an electro-hydraulic actuator, comprising: a gear box, a gear with a keyhole is arranged in the gear box, the keyhole can be inserted by a valve shaft, so that the gear can control the valve by driving the valve shaft to rotate, a cylinder is respectively arranged at the upper part and the lower part of the gear box, the middle parts of the two cylinders are communicated with the gear box, each cylinder is provided with two pistons and a cylindrical rack positioned between the two pistons, each piston is provided with a sealing ring capable of sealing a gap between the piston and the cylinder, the two racks are respectively engaged with the gear through the communication part of the cylinder and the gear box, two ends of each cylinder are respectively provided with an oil hole communicated with an inner cavity of the cylinder, pressure oil can drive the piston at the end of the cylinder to push the rack and the other piston to move towards the other end of the cylinder after being introduced into one end of the cylinder through the oil holes, so that the rack can drive the gear to rotate, Another piston can be with the oilhole extrusion cylinder of the oil in the cylinder other end through its place end, two oilholes on every cylinder all lead to oil in turn like this and make two racks do the reciprocating motion opposite in direction after just can drive gear positive and negative rotation, all be provided with a support axle bush between the back of every rack and cylinder, support the axle bush and adjust the meshing clearance between rack and the gear through pressing the rack, its characterized in that: the bottom of two ends of each cylinder barrel cavity is provided with a buffer sleeve facing a piston, the outer ends of two pistons in each cylinder barrel are respectively provided with a buffer boss facing the buffer sleeve at the end where the two pistons are located, each buffer boss is formed by coaxially connecting a circular table section and a cylindrical section located on the inner side of the circular table section, the small end of the circular table section is located on the outer side, the diameter of the cylindrical section is equal to the diameter of the large end of the circular table section, the cylindrical section is fixed with the piston, each buffer sleeve is provided with a damping hole and an open flow hole, one port of the damping hole is located on the end face of the buffer sleeve and communicated with the cylinder barrel cavity, the other port of the damping hole is communicated with an oil hole at the end of the damping hole through a pipeline with a one-way throttle valve, the one-way throttle valve can throttle oil flowing from the damping hole to the oil hole, and one port of the open flow hole is located on the inner ring, the other port of the smooth flow hole is communicated with the oil hole at the end of the smooth flow hole through a pipeline, an inner ring sealing ring positioned at the inner side of the smooth flow hole is arranged on the side wall of the inner ring of each buffer sleeve, when the piston moves to the end part of the cylinder barrel, the buffer boss on the piston can be inserted into the corresponding buffer sleeve, so that the circular platform section on the buffer boss can gradually reduce the through-flow section of the inner ring of the buffer sleeve along with the insertion, thereby reducing the oil flowing out from the smooth flow hole, playing a role of buffering the speed of the piston, when the cylindrical section on the buffer boss is inserted into the buffer sleeve, the inner ring sealing ring can seal the gap between the cylindrical section and the buffer sleeve, so that the oil cannot flow out through the smooth flow hole, and the oil can only flow out from the damping hole, thus limiting the flow of the oil through the one-way throttle valve and playing a role of buffering the speed of the, the speed of the piston speed reduction can be adjusted; the rack in each cylinder barrel and the two pistons are not fixedly connected; an annular accommodating groove is formed in the side wall of each piston, a dirt accommodating ring for cleaning impurities is placed in each accommodating groove, and the dirt accommodating ring is located on the inner side of a sealing ring on the piston; the support bearing bush is an arc-shaped spherical iron bush, a blind hole is formed in the surface of the outer ring of the support bearing bush, a countersunk threaded hole is formed in the side wall of the cylinder barrel, an adjusting bolt is screwed into the countersunk threaded hole from outside to inside, and the inner end of the adjusting bolt is inserted into the blind hole and presses the support bearing bush; two guide rings which are sleeved on the rack and are respectively positioned on two sides of the gear are embedded in each cylinder barrel, the guide rings can guide the rack and can prevent the end part of the rack from scraping the inner wall of the cylinder barrel when the rack is flexibly deformed.
2. The electro-hydraulic actuator swing cylinder of claim 1, wherein: the one-way throttle valve is provided with a manual knob positioned on the outer side, and the throttle opening of the one-way throttle valve can be conveniently adjusted by rotating the manual knob.
3. The electro-hydraulic actuator swing cylinder of claim 1, wherein: the width of the guide ring is not less than twice the pitch on the rack.
4. The electro-hydraulic actuator swing cylinder of claim 1, wherein: the blind hole is located at the center of the supporting bearing bush.
5. The electro-hydraulic actuator swing cylinder of claim 1, wherein: and a sealing ring is arranged between the buffer sleeve and the side wall of the cylinder barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011426523.4A CN112431807B (en) | 2020-12-09 | 2020-12-09 | Swing hydraulic cylinder in electrohydraulic actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011426523.4A CN112431807B (en) | 2020-12-09 | 2020-12-09 | Swing hydraulic cylinder in electrohydraulic actuator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112431807A true CN112431807A (en) | 2021-03-02 |
| CN112431807B CN112431807B (en) | 2024-05-28 |
Family
ID=74691812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011426523.4A Active CN112431807B (en) | 2020-12-09 | 2020-12-09 | Swing hydraulic cylinder in electrohydraulic actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112431807B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113441540A (en) * | 2021-07-20 | 2021-09-28 | 河北环境工程学院 | A high-efficient reaction separation drip washing device for heavy metal contaminated soil |
| CN114083340A (en) * | 2021-11-29 | 2022-02-25 | 广东职业技术学院 | Protective door of numerical control machine tool |
| CN115898978A (en) * | 2022-11-16 | 2023-04-04 | 湖南福能液压科技有限公司 | Automatic pressure compensating system of hydraulic elastic support |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003083308A (en) * | 2001-09-11 | 2003-03-19 | Taiyo Ltd | Rotary actuator |
| CN201412406Y (en) * | 2009-03-30 | 2010-02-24 | 张伟 | Rack and pinion oscillating oil cylinder |
| CN208138237U (en) * | 2018-04-28 | 2018-11-23 | 四川长江液压天成机械有限公司 | A kind of biparting shape gearing oil cylinder |
| CN209621754U (en) * | 2019-02-01 | 2019-11-12 | 江苏源普控制设备有限公司 | Oscillating oil cylinder |
| CN210623248U (en) * | 2019-08-27 | 2020-05-26 | 扬州来源液压设备有限公司 | Rack and pinion oil cylinder |
| CN215257082U (en) * | 2020-12-09 | 2021-12-21 | 张家港市艾罗执行器有限公司 | Swing hydraulic cylinder in electro-hydraulic actuator |
-
2020
- 2020-12-09 CN CN202011426523.4A patent/CN112431807B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003083308A (en) * | 2001-09-11 | 2003-03-19 | Taiyo Ltd | Rotary actuator |
| CN201412406Y (en) * | 2009-03-30 | 2010-02-24 | 张伟 | Rack and pinion oscillating oil cylinder |
| CN208138237U (en) * | 2018-04-28 | 2018-11-23 | 四川长江液压天成机械有限公司 | A kind of biparting shape gearing oil cylinder |
| CN209621754U (en) * | 2019-02-01 | 2019-11-12 | 江苏源普控制设备有限公司 | Oscillating oil cylinder |
| CN210623248U (en) * | 2019-08-27 | 2020-05-26 | 扬州来源液压设备有限公司 | Rack and pinion oil cylinder |
| CN215257082U (en) * | 2020-12-09 | 2021-12-21 | 张家港市艾罗执行器有限公司 | Swing hydraulic cylinder in electro-hydraulic actuator |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113441540A (en) * | 2021-07-20 | 2021-09-28 | 河北环境工程学院 | A high-efficient reaction separation drip washing device for heavy metal contaminated soil |
| CN113441540B (en) * | 2021-07-20 | 2022-06-03 | 河北环境工程学院 | A high-efficient reaction separation drip washing device for heavy metal contaminated soil |
| CN114083340A (en) * | 2021-11-29 | 2022-02-25 | 广东职业技术学院 | Protective door of numerical control machine tool |
| CN115898978A (en) * | 2022-11-16 | 2023-04-04 | 湖南福能液压科技有限公司 | Automatic pressure compensating system of hydraulic elastic support |
| CN115898978B (en) * | 2022-11-16 | 2023-09-22 | 湖南福能液压科技有限公司 | Automatic pressure supplementing system of hydraulic elastic support |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112431807B (en) | 2024-05-28 |
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