CN107339278A - Stroke-controllable automatic reciprocating hydraulic cylinder - Google Patents
Stroke-controllable automatic reciprocating hydraulic cylinder Download PDFInfo
- Publication number
- CN107339278A CN107339278A CN201710727772.9A CN201710727772A CN107339278A CN 107339278 A CN107339278 A CN 107339278A CN 201710727772 A CN201710727772 A CN 201710727772A CN 107339278 A CN107339278 A CN 107339278A
- Authority
- CN
- China
- Prior art keywords
- valve core
- reversing valve
- cylinder body
- hydraulic cylinder
- spool chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 47
- 239000010720 hydraulic oil Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1414—Characterised by the construction of the motor unit of the straight-cylinder type with non-rotatable piston
-
- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
-
- 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
- F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
-
- 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
- F15B15/202—Externally-operated valves mounted in or on the actuator
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
An automatic reciprocating hydraulic cylinder with controllable stroke relates to a hydraulic cylinder. The hydraulic cylinder comprises a hydraulic cylinder body, a piston and a piston rod are arranged in the hydraulic cylinder body, a valve core cavity is arranged in the side wall of the hydraulic cylinder body, a reversing valve core capable of sliding left and right is arranged in the valve core cavity, sliding blocks are respectively arranged in the valve core cavities on the left side and the right side of the reversing valve core in a sliding mode, return springs are respectively arranged between the sliding blocks and the reversing valve core, the reversing valve core is arranged at two left and right stations in the valve core cavity, and reciprocating motion control of the hydraulic cylinder is. The invention can provide the oil pressure required by the working of the hydraulic cylinder and the power required by reversing by dividing the oil supply path into two parts, thereby saving an external control device. The reversing valve core is arranged in the cylinder body after being structurally modified, and is matched with the positioning mechanism, so that the working space is greatly reduced.
Description
Technical field
The present invention relates to a kind of hydraulic cylinder, specially a kind of automatic reciprocating hydraulic cylinder of stroke controllable type.
Background technology
The most structure type of hydraulic cylinder in the market is simple, i.e., only single input and output hydraulic fluid port, without setting
Count other be used for control structure.When needing commutation, only by coupled hydraulic valve outside manual operation or other
Control device, hydraulic cylinder is set to commutate, automaticity is relatively low.
With the development of national economy, market requires more and more higher to the degree of automation, and increasing machine starts
Substitute worker, thus design it is a without it is manually-operated, can automatic reciprocating hydraulic cylinder be required for meeting national development
, the automatic reciprocating hydraulic cylinder that in the market occurs is mostly external structure complexity, and integrated level is poor.
The content of the invention
It is an object of the invention to provide a kind of automatic reciprocating hydraulic cylinder simple in construction, dependable performance.By by fuel feeding
Oil circuit is divided into two, you can oil pressure needed for providing hydraulic cylinder works, the power needed for commutation can be provided again, so as to realize hydraulic cylinder
Rotation move back and forth.
Realizing the technical scheme of above-mentioned purpose is：A kind of automatic reciprocating hydraulic cylinder of stroke controllable type, it is characterised in that：Including
Cylinder body, piston and piston rod are provided with cylinder body, spool chamber, valve element are provided with the side wall of cylinder body
Intracavitary is provided with the reversing valve core that can be horizontally slipped, and is slided respectively in the spool chamber at left and right sides of reversing valve core and sets sliding block, sliding
Return spring is respectively arranged between block and reversing valve core；
Exhaust passage and the first annular groove and the second annular groove arranged in left and right are provided with the reversing valve core, exhaust is logical
Road connection reversing valve core both sides are provided with the spool chamber of return spring；Pressure oil port, are provided with the outer wall of cylinder body
One oil return opening, the second oil return opening, be provided with the side wall of cylinder body with the first work oil ducts, the second work oil ducts, first
Work oil ducts are provided with the tie point for being respectively communicated with cylinder body rodless cavity and connection positioned at valve element on the left of left slider
Second branch road of chamber, the second work oil ducts are provided with the 3rd branch road for being respectively communicated with cylinder body rod chamber and connection is located at
4th branch road of spool chamber on the right side of the sliding block of right side；
Reversing valve core is provided with two stations in left and right in spool chamber, and when reversing valve core is in left position, pressure oil port passes through
The second annular groove on reversing valve core connects with the first work oil ducts, and the second work oil ducts pass through first annular on reversing valve core
Groove connects with the first oil return opening, and the exhaust passage on reversing valve core connects with the second oil return opening；When reversing valve core is in right position,
Pressure oil port is connected by the first annular groove on reversing valve core with the second work oil ducts, and the first work oil ducts pass through reversing valve core
On the second annular groove connected with the second oil return opening, the exhaust passage on reversing valve core connects with the first oil return opening；
Detent mechanism is additionally provided between reversing valve core and the inwall of spool chamber, the detent mechanism is used to be in reversing valve core
During two stations in left and right, reversing valve core is positioned in spool chamber.
Further, be connected with cylinder body two respectively with the second branch road, the 4th branch road is corresponding, is adjusted for flow
The regulating bolt of section, regulating bolt are extended respectively in the second branch road and the 4th branch road.
Further, the detent mechanism is respectively arranged between the both sides of reversing valve core and the inwall of spool chamber, is positioned
Mechanism includes the mounting groove being arranged in spool chamber side wall, is provided with positioning ball in mounting groove, positions the bottom land of ball and mounting groove
Between be provided with holddown spring, be provided with reversing valve core outer wall positioning ball coordinate annular groove；
When reversing valve core is in left position, the positioning ball positioned at the detent mechanism in left side coordinates in corresponding annular groove；When changing
When being in right position to valve element, the positioning ball positioned at the detent mechanism on right side coordinates in corresponding annular groove.
Further, the exhaust passage includes downward through the interconnection of reversing valve core and two along its length
The vertical passageway connected through reversing valve core and with interconnection.
The beneficial effects of the invention are as follows：The present invention is by the way that oil feeding line is divided into two, you can provides hydraulic cylinder works institute
Oil pressure is needed, the power needed for commutation can be provided again, eliminate external control device.After reversing valve core is transformed in structure again
It is built in cylinder body, and it is substantially reduced with detent mechanism mutual cooperation, working space.The stroke of all directions at work
Size and commutating frequency can be individually adjusted to be mutually independent of each other by regulating bolt.The present invention is simple in construction, automates journey
Degree is high, stable work in work.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the partial schematic diagram of detent mechanism；
Fig. 3 is the structural representation that reversing valve core is located at left position；
Fig. 4 is the structural representation that reversing valve core is located at right position.
Embodiment
As shown in Figure 1, 2, the present invention includes cylinder body 1, and piston 14 and piston rod 15 are provided with cylinder body,
Spool chamber 2 is provided with the side wall of cylinder body 1, the reversing valve core 3 that can be horizontally slipped, reversal valve are provided with spool chamber 2
Slided respectively in the spool chamber of the left and right sides of core 3 and sliding block 4 is set, return spring is respectively arranged between sliding block 4 and reversing valve core 3
5。
Exhaust passage 6 and the annular groove 8 of first annular groove 7 and second arranged in left and right, row are provided with reversing valve core 3
Gas passage 6 connects the spool chamber 2 that the both sides of reversing valve core 3 are provided with return spring 5, and exhaust passage 6 includes running through along its length
The interconnection 61 of reversing valve core 3 and two are downward through reversing valve core 3 and the vertical passageway that is connected with interconnection 61
62、63；Pressure oil port 9, the first oil return opening 10, the second oil return opening 11, cylinder body are provided with the outer wall of cylinder body 1
Be provided with 1 side wall with the first work oil ducts 12, the second work oil ducts 13, the first work oil ducts 12, which are provided with, is respectively communicated with liquid
The tie point 121 of cylinder pressure body rodless cavity and connection are located at the second branch road 122 of the left side spool chamber 2 of left slider 4, the
Two work oil ducts 13 are provided with the 3rd branch road 131 for being respectively communicated with cylinder body rod chamber and connection positioned at right side sliding block
4th branch road 132 of right side spool chamber 2.
Be connected with cylinder body 1 two respectively with the second branch road 122, the 4th branch road it is 132 corresponding, for Flow-rate adjustment
Regulating bolt 16, regulating bolt 16 is extended respectively in the second branch road 122 and the 4th branch road 132, by adjusting regulating bolt
The length that 16 screw rod end is extended in the second branch road 122 and the 4th branch road 132, so as to realize Flow-rate adjustment.
Reversing valve core 3 is provided with two stations in left and right, when reversing valve core 3 is in left position, pressure oil in spool chamber 2
Mouth 9 is connected by the second annular groove 8 on reversing valve core 3 with the first work oil ducts 12, and the second work oil ducts 13 pass through reversal valve
First annular groove 7 on core 3 connects with the first oil return opening 10, and exhaust passage 6 is located at the oil return of vertical passageway 62 and second in left side
Mouth 11 connects；When reversing valve core 3 is in right position, pressure oil port 9 passes through the work of first annular groove 7 and second on reversing valve core 3
Make oil duct 13 to connect, the first work oil ducts 12 are connected by the second annular groove 8 on reversing valve core 3 with the second oil return opening 11, row
The vertical passageway 63 that gas passage 6 is located at right side connects with the first oil return opening 10.
The detent mechanism 17, detent mechanism 17 are respectively arranged between the both sides of reversing valve core 3 and the inwall of spool chamber 2
Including the mounting groove 171 being arranged in spool chamber side wall, positioning ball 172, positioning ball 172 and installation are provided with mounting groove 171
Holddown spring 173 is provided between the bottom land of groove 171, positioning ball is provided with the outer wall of reversing valve core 3 and matches somebody with somebody 172 annular grooves closed
174。
When reversing valve core 3 is in left position, the positioning ball 172 positioned at the detent mechanism 17 in left side coordinates in corresponding annular
In groove 174；When reversing valve core 17 is in right position, the positioning ball 172 positioned at the detent mechanism 17 on right side coordinates in corresponding ring
In shape groove 174.
The operation principle of the present invention：
When the left position of reversing valve core 3 as shown in Figure 3 switches to the right position shown in Fig. 4, the detent mechanism 17 positioned at left side is determined
Position ball 172 coordinates in corresponding annular groove 174, and hydraulic oil enters the first working oil from pressure oil port 9 by the second annular groove 8
Road 12, promote piston 14 and the displacement to the right of sliding block 4 positioned at left side, time of the compression to the right positioned at left side simultaneously of sliding block 4 in left side
Position spring 5；Hydraulic oil in the rod chamber of cylinder body 1 is through first annular groove 7, the oil return box of the first oil return opening 10, two sliding blocks 4
Between spool chamber 2 in gas be located at vertical passageway 63, the oil return box of the second oil return opening 11 on right side by exhaust passage 6.
After piston 14 moves right a segment distance, the hydraulic oil flowed into the left side spool chamber 2 of left slider 4 becomes more,
Left slider 4 compressed under the promotion of hydraulic oil on the left of return spring 5 and promote reversing valve core 3 to the right, and working as motive force
More than the holddown spring 173 of left positioner mechanism 17 thrust when promote reversing valve core 3 move to right, the detent mechanism 17 on right side
Positioning ball 172 coordinates in corresponding annular groove 174, so that reversing valve core switches to the right side station shown in Fig. 4.
The direction that now liquid flows in cylinder body 1 changes, and occurs so as to the direction of motion of cylinder body 1
Change, reversing valve core 3 is continued to move to not to the right, and left slider 4 is moved to the left under the promotion of the return spring 5 in left side, left
Hydraulic oil in the left side spool chamber 2 of side slide 4 passes sequentially through the first work oil ducts 12, the second annular groove 8, the second oil return opening 11
Oil return box.
When the right position of reversing valve core 3 as shown in Figure 4 to shown in Fig. 3 left position switch principle it is identical, will not be repeated here.
So circulation, cylinder body 1 automatic in the case where being controlled without the external world can change the direction of motion, that is, realize automatic
Reciprocal function.And the stroke size and commutating frequency of all directions can be individually adjusted by adjusting nut 16.
Claims (4)
- A kind of 1. automatic reciprocating hydraulic cylinder of stroke controllable type, it is characterised in that：Including cylinder body, set in cylinder body There are piston and piston rod, spool chamber is provided with the side wall of cylinder body, the commutation that can be horizontally slipped is provided with spool chamber Valve element, slide respectively in the spool chamber at left and right sides of reversing valve core and sliding block is set, be respectively arranged between sliding block and reversing valve core Return spring；Exhaust passage and the first annular groove and the second annular groove arranged in left and right are provided with the reversing valve core, exhaust is logical Road connection reversing valve core both sides are provided with the spool chamber of return spring；Pressure oil port, are provided with the outer wall of cylinder body One oil return opening, the second oil return opening, be provided with the side wall of cylinder body with the first work oil ducts, the second work oil ducts, first Work oil ducts are provided with the tie point for being respectively communicated with cylinder body rodless cavity and the left side spool chamber for connecting left slider The second branch road, the second work oil ducts are provided with the 3rd branch road that is respectively communicated with cylinder body rod chamber and connection positioned at the right side 4th branch road of spool chamber on the right side of side slide；Reversing valve core is provided with two stations in left and right in spool chamber, and when reversing valve core is in left position, pressure oil port is by changing Connected to the second annular groove on valve element with the first work oil ducts, the second work oil ducts pass through the first annular groove on reversing valve core Connected with the first oil return opening, the exhaust passage on reversing valve core connects with the second oil return opening；When reversing valve core is in right position, pressure Power hydraulic fluid port is connected by the first annular groove on reversing valve core with the second work oil ducts, and the first work oil ducts pass through on reversing valve core The second annular groove connected with the second oil return opening, the exhaust passage on reversing valve core connects with the first oil return opening；Detent mechanism is additionally provided between reversing valve core and the inwall of spool chamber, the detent mechanism is used to be in reversing valve core During two stations in left and right, reversing valve core is positioned in spool chamber.
- A kind of 2. automatic reciprocating hydraulic cylinder of stroke controllable type according to claim 1, it is characterised in that：On cylinder body Be connected with two respectively with the second branch road, the 4th branch road is corresponding, regulating bolt for Flow-rate adjustment, regulating bolt each extends over To the second branch road and the 4th branch road.
- A kind of 3. automatic reciprocating hydraulic cylinder of stroke controllable type according to claim 1, it is characterised in that：The two of reversing valve core The detent mechanism is respectively arranged between side and the inwall of spool chamber, detent mechanism includes the peace being arranged in spool chamber side wall Tankage, positioning ball is provided with mounting groove, positions and be provided with holddown spring, reversing valve core outer wall between ball and the bottom land of mounting groove On be provided with positioning ball coordinate annular groove；When reversing valve core is in left position, the positioning ball positioned at the detent mechanism in left side coordinates in corresponding annular groove；When changing When being in right position to valve element, the positioning ball positioned at the detent mechanism on right side coordinates in corresponding annular groove.
- A kind of 4. automatic reciprocating hydraulic cylinder of stroke controllable type according to claim 1, it is characterised in that：The exhaust passage Interconnection and two including running through reversing valve core along its length are connected downward through reversing valve core and with interconnection Vertical passageway.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710727772.9A CN107339278A (en) | 2017-08-23 | 2017-08-23 | Stroke-controllable automatic reciprocating hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710727772.9A CN107339278A (en) | 2017-08-23 | 2017-08-23 | Stroke-controllable automatic reciprocating hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107339278A true CN107339278A (en) | 2017-11-10 |
Family
ID=60214327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710727772.9A Pending CN107339278A (en) | 2017-08-23 | 2017-08-23 | Stroke-controllable automatic reciprocating hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107339278A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108006001A (en) * | 2017-12-29 | 2018-05-08 | 浙江洁普斯清洁设备有限公司 | A kind of reciprocating air cylinder of automatic switchover |
| CN108708885A (en) * | 2018-08-10 | 2018-10-26 | 苏州劳灵精密机械有限公司 | Valve barrel integrated component, piston cylinder start module and modular fluid transmission device |
| CN109681484A (en) * | 2019-01-08 | 2019-04-26 | 江苏大学 | A kind of automatic reciprocating valve gear of mechanical adjustable hydraulic |
| CN110985479A (en) * | 2019-12-29 | 2020-04-10 | 邵延荣 | Automatic reversing hydraulic cylinder |
| CN111853515A (en) * | 2020-08-13 | 2020-10-30 | 杜应特 | Automatic reciprocating pushing mechanism of pneumatic high-pressure oiling machine |
| CN113124016A (en) * | 2021-04-19 | 2021-07-16 | 东北石油大学 | Automatic reciprocating hydraulic cylinder |
| CN113339354A (en) * | 2021-08-02 | 2021-09-03 | 中国电建集团透平科技有限公司 | Moving blade adjusting device of axial flow fan |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1467402A (en) * | 2002-06-13 | 2004-01-14 | 马栋栋 | Pneumatic transfusing device |
| CN101929449A (en) * | 2010-09-07 | 2010-12-29 | 济南赛思特流体系统设备有限公司 | Hydraulic drive liquid booster pump |
| CN104265714A (en) * | 2014-10-09 | 2015-01-07 | 平原机器厂（新乡） | Piston actuator and automatic reversing valve thereof |
| CN204082762U (en) * | 2014-09-17 | 2015-01-07 | 扬州市江都永坚有限公司 | The automatic reciprocating oil hydraulic cylinder of a kind of integrated form |
| CN105757030A (en) * | 2016-05-05 | 2016-07-13 | 哈尔滨工程大学 | Autocontrol pneumatic reversing valve |
| CN207111584U (en) * | 2017-08-23 | 2018-03-16 | 南通理工智能制造技术有限公司 | Stroke-controllable automatic reciprocating hydraulic cylinder |
-
2017
- 2017-08-23 CN CN201710727772.9A patent/CN107339278A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1467402A (en) * | 2002-06-13 | 2004-01-14 | 马栋栋 | Pneumatic transfusing device |
| CN101929449A (en) * | 2010-09-07 | 2010-12-29 | 济南赛思特流体系统设备有限公司 | Hydraulic drive liquid booster pump |
| CN204082762U (en) * | 2014-09-17 | 2015-01-07 | 扬州市江都永坚有限公司 | The automatic reciprocating oil hydraulic cylinder of a kind of integrated form |
| CN104265714A (en) * | 2014-10-09 | 2015-01-07 | 平原机器厂（新乡） | Piston actuator and automatic reversing valve thereof |
| CN105757030A (en) * | 2016-05-05 | 2016-07-13 | 哈尔滨工程大学 | Autocontrol pneumatic reversing valve |
| CN207111584U (en) * | 2017-08-23 | 2018-03-16 | 南通理工智能制造技术有限公司 | Stroke-controllable automatic reciprocating hydraulic cylinder |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108006001A (en) * | 2017-12-29 | 2018-05-08 | 浙江洁普斯清洁设备有限公司 | A kind of reciprocating air cylinder of automatic switchover |
| CN108006001B (en) * | 2017-12-29 | 2023-12-12 | 山东洁普斯自动化科技有限公司 | Automatic switching reciprocating cylinder |
| CN108708885A (en) * | 2018-08-10 | 2018-10-26 | 苏州劳灵精密机械有限公司 | Valve barrel integrated component, piston cylinder start module and modular fluid transmission device |
| CN108708885B (en) * | 2018-08-10 | 2024-05-03 | 苏州辛得利机电科技有限公司 | Valve cylinder integrated element, piston cylinder actuation module and modularized fluid transmission device |
| CN109681484A (en) * | 2019-01-08 | 2019-04-26 | 江苏大学 | A kind of automatic reciprocating valve gear of mechanical adjustable hydraulic |
| CN110985479A (en) * | 2019-12-29 | 2020-04-10 | 邵延荣 | Automatic reversing hydraulic cylinder |
| CN110985479B (en) * | 2019-12-29 | 2021-08-27 | 山东金利液压科技有限公司 | Automatic reversing hydraulic cylinder |
| CN111853515A (en) * | 2020-08-13 | 2020-10-30 | 杜应特 | Automatic reciprocating pushing mechanism of pneumatic high-pressure oiling machine |
| CN113124016A (en) * | 2021-04-19 | 2021-07-16 | 东北石油大学 | Automatic reciprocating hydraulic cylinder |
| CN113339354A (en) * | 2021-08-02 | 2021-09-03 | 中国电建集团透平科技有限公司 | Moving blade adjusting device of axial flow fan |
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| PB01 | Publication | ||
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| AD01 | Patent right deemed abandoned | ||
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20231201 |