CN101782090A - Double self locking hydraulic cylinder - Google Patents
Double self locking hydraulic cylinder Download PDFInfo
- Publication number
- CN101782090A CN101782090A CN 201010121462 CN201010121462A CN101782090A CN 101782090 A CN101782090 A CN 101782090A CN 201010121462 CN201010121462 CN 201010121462 CN 201010121462 A CN201010121462 A CN 201010121462A CN 101782090 A CN101782090 A CN 101782090A
- Authority
- CN
- China
- Prior art keywords
- hydraulic
- cylinder
- sliding sleeve
- locking
- piston rod
- 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
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 239000003921 oil Substances 0.000 claims description 31
- 239000012530 fluid Substances 0.000 claims description 29
- 229910000831 Steel Inorganic materials 0.000 claims description 20
- 239000010959 steel Substances 0.000 claims description 20
- 239000010720 hydraulic oil Substances 0.000 claims description 10
- 230000007306 turnover Effects 0.000 claims description 6
- 230000006872 improvement Effects 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Images
Landscapes
- Actuator (AREA)
Abstract
The invention relates to improvement on a hydraulic cylinder, in particular to a double self locking hydraulic cylinder having the combined functions of mechanical self locking and hydraulic self locking. The double self locking hydraulic cylinder has the advantages that: based on the traditional hydraulic cylinder, a mechanical and hydraulic double self locking design is adopted, a locking mode of primary hydraulic locking and secondary mechanical locking is realized, the hydraulic locking force is large, the locking force is adjustable and the locking technology is reliable; a piston rod extends out completely, and after the hydraulic cylinder is locked, the power supply and other power sources can be turned off to save energy as the hydraulic cylinder can maintain a locked state for a long time without any power; and the mechanical and hydraulic double self locking performance is stable, the sealing and locking are reliable, the pressure loss is simple, the pressure resistance is high, the structure is compact, and the locking operation is smooth without impact and vibration.
Description
Technical field
The invention belongs to the hydraulic equipment technical field, relate to a kind of improvement of oil hydraulic cylinder, specifically is a kind of double self locking hydraulic cylinder that possesses mechanical self-latching and hydraulic pressure auto-lock function simultaneously.
Background technique
Oil hydraulic cylinder is a kind of application area equipment very widely, generally with fluid as working medium, the variation by sealed volume comes transmitting movement, comes transferring power by the fluid pressure inside, can hydraulic pressure be can change into mechanical energy, straight reciprocating motion or oscillating motion done.Oil hydraulic cylinder is made up of several parts such as piston rod, cylinder body, piston and sealing systems usually.Development along with oil hydraulic cylinder, be applied in more and more on the vertical jacking apparatus, guide rail locking apparatus, milling train locking device of radar fix device, the bridge formation machine of some machinery such as space flight navigation, in these applications, the piston rod of oil hydraulic cylinder need remain on the same position state within a certain period of time usually and can not have mobile.Such requirement was to realize by Pilot operated check valve of serial connection on the return line of oil hydraulic cylinder in the past, but there is following shortcoming in this lock mode: leak because oil hydraulic cylinder can not be accomplished to seal completely not have, particularly under the situation of bearing certain pressure, leaking appears in hydraulic oil unavoidably, at this time piston rod will produce certain displacement, thereby has influence on the working efficiency and the Security of equipment.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of structure ingenious reasonable, safe and reliable double self locking hydraulic cylinder, the piston rod of this oil hydraulic cylinder is by mechanical self-latching and the locking of hydraulic pressure self-locking dual mode, can overcome the stressed crooked resistance that produces of piston rod, make hydraulic cylinder self locking more reliable, guarantee the security of operation of equipment.
According to technological scheme provided by the invention, described double self locking hydraulic cylinder comprises the piston rod that cylinder body and dress can move freely within it, the piston rod tail end is equipped with piston, piston is divided into rod chamber and rodless cavity with cylinder body, rod chamber is by rod chamber hydraulic fluid port turnover hydraulic oil, and rodless cavity is by rodless cavity hydraulic fluid port turnover hydraulic oil; The head end of cylinder body is connected with cylinder head, in the cylinder body of cylinder head inboard sliding sleeve is installed, and the center of cylinder head and sliding sleeve offers center hole, and the head end of piston rod passes center hole, and the center hole sealed sliding on piston rod and cylinder head, the sliding sleeve movingly; It is characterized in that, in the cylinder body along head end caudad direction be divided into first position with first internal diameter and second position with second internal diameter, first internal diameter is greater than second internal diameter; Cylinder head, sliding sleeve sealing are assemblied in first position of cylinder body, form lock chambers between cylinder head, the sliding sleeve, and lock chambers is by lock chambers hydraulic fluid port turnover hydraulic oil; Between cylinder head, the sliding sleeve spring is housed, spring one end is pressed on the cylinder head, and the other end is pressed on sliding sleeve on the interior edge face at first position; Center hole edge on the other end of described sliding sleeve extends axially backward and forms an extension, and the external diameter of extension is less than second internal diameter of described cylinder body, and the diameter of extension tail end diminishes gradually, shrinks to form the conical surface; Be concaved with an annular groove on the inwall at cylinder body second position, the transverse section of annular groove is arc or semicircle; On the front-end face of piston, be provided with an annular cavity, the perisporium of annular cavity is provided with a circular groove, be equipped with at least one steel ball in the circular groove, the internal diameter of annular cavity is greater than the external diameter of extension, the extension can be inserted annular cavity and be contacted steel ball, the radius of steel ball is less than the radius of described annular groove, and steel ball can be contained in the annular groove.
As a further improvement on the present invention, be concaved with cylinder head spring eye and the sliding sleeve spring eye that is used for putting spring on described cylinder head and the sliding sleeve opposing end faces respectively.
As a further improvement on the present invention, described rodless cavity hydraulic fluid port, rod chamber hydraulic fluid port and lock chambers hydraulic fluid port are opened in the head end of piston rod, the rodless cavity hydraulic fluid port is communicated to the oil hydraulic cylinder rodless cavity by the rodless cavity oil duct on the piston rod, the rod chamber hydraulic fluid port is communicated to the oil hydraulic cylinder rod chamber by the rod chamber oil duct on the piston rod, and the lock chambers hydraulic fluid port is communicated to lock chambers by the locking oil duct on the piston rod.
The present invention compared with prior art, advantage is:
(1), adopt machinery and the design of hydraulic pressure double self locking, based on hydraulic lock, mechanical interlocking is auxilliary, hydraulic lock power is big, and coupling mechanism force is adjustable, and is reliable from lock technology.
(2), piston rod all stretches out, behind the hydraulic locking cylinder, can break power down source and other power source, under effect without any power, but the oil hydraulic cylinder long period maintain the lock status, save the energy.
(3), the stable performance of machinery and hydraulic pressure double self locking, the sealing reliable lock, the pressure loss is little, withstand voltage height, compact structure, mild no shock and vibration when the action of open and close lock.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Description of reference numerals: 1-piston rod, 2-cylinder head, 3-flange, 4-spring, 5-sliding sleeve, 6-cylinder body, 7-extension, 8-annular groove, the 9-conical surface, 10-steel ball, 11-piston, 12-rodless cavity, 13-second position, 14-rod chamber, 15-lock chambers, 16-first position, 17-rodless cavity oil duct, 18-rod chamber oil duct, 19-rodless cavity hydraulic fluid port, 20-rod chamber hydraulic fluid port, 21-lock chambers hydraulic fluid port, 22-annular cavity, D1-first internal diameter, D2-second internal diameter.
Embodiment
The invention will be further described below in conjunction with concrete drawings and Examples.
As shown in Figure 1, piston rod 1 is contained in the cylinder body 6 and can moves freely, and piston rod 1 tail end is equipped with piston 11, and piston 11 is divided into rod chamber 14 and rodless cavity 12 with cylinder body 6; In the cylinder body 6 along head end caudad direction be divided into first position 16 and have second position, 13, the first inside diameter D 1 of second inside diameter D 2 greater than second inside diameter D 2 with first inside diameter D 1; The head end of cylinder body 6 is connected with cylinder head 2 by flange 3, in the cylinder body 6 of cylinder head 2 inboards, sliding sleeve 5 is installed, cylinder head 2 offers center hole with the center of sliding sleeve 5, and the head end of piston rod 1 passes center hole, and the center hole sealed sliding on piston rod 1 and cylinder head 2, the sliding sleeve 5 movingly; Cylinder head 2, sliding sleeve 5 sealings are assemblied in first position 16 of cylinder body 6, form lock chambers 15 between cylinder head 2, the sliding sleeve 5, spring 4 with strong reset function is housed between cylinder head 2, the sliding sleeve 5, be concaved with cylinder head spring eye and the sliding sleeve spring eye that is used for putting spring 4 respectively on cylinder head 2 and sliding sleeve 5 opposing end faces, spring 4 one ends are pressed on the cylinder head 2, and the other end is pressed on sliding sleeve 5 on the interior edge face at first position 16; Center hole edge on the other end of described sliding sleeve 5 extends axially backward and forms an extension 7, and the external diameter of extension 7 is less than second inside diameter D 1 of described cylinder body 6, and the diameter of extension 7 tail ends diminishes gradually, shrinks to form the conical surface 9; Be concaved with an annular groove 8 on the inwall at cylinder body 6 second positions 13, the transverse section of annular groove 8 is arc or semicircle; On the front-end face of piston 11, be provided with an annular cavity 22, the perisporium of annular cavity 22 is provided with a circular groove, be equipped with a plurality of steel balls 10 in the circular groove, the internal diameter of annular cavity 22 is greater than the external diameter of extension 7, extension 7 can be inserted annular cavity 22 and be contacted steel ball 10, the radius of steel ball 10 is less than the radius of described annular groove 8, and steel ball 10 can be contained in the annular groove 8; The head end of described piston rod 1 offers rodless cavity hydraulic fluid port 19, rod chamber hydraulic fluid port 20 and lock chambers hydraulic fluid port 21, rodless cavity hydraulic fluid port 19 is communicated to oil hydraulic cylinder rodless cavity 12 by the rodless cavity oil duct 17 on the piston rod 1, rod chamber hydraulic fluid port 20 is communicated to oil hydraulic cylinder rod chamber 14 by the rod chamber oil duct 18 on the piston rod 1, and lock chambers hydraulic fluid port 21 is communicated to lock chambers 15 by the locking oil duct (not shown) on the piston rod 1.
Working principle of the present invention and working procedure are as follows:
Lock operation: when rodless cavity 12 oil-feeds, when rod chamber 14 and lock chambers 15 oil returns, hydraulic oil promotion piston 11 and piston rod 1 are to left movement, and piston rod 1 stretches out, and piston 11 drives steel balls 10 and is moved to the left, steel ball 10 contacts the conical surface 9 of sliding sleeve 5 and overcomes the thrust of spring 4, promote sliding sleeve 5 and be moved to the left, when moving to certain position, steel ball 10 enters in the annular groove 8 on cylinder body 6 inner hole walls, oil hydraulic cylinder arrives working stroke, and piston rod 1 can not move again; At this moment, lock chambers 15 and rodless cavity 12 oil-feeds, rod chamber 14 oil returns, the elastic reset power of spring 4 produces pressure and promotes sliding sleeve 5 and move right when closing in the lock chambers 15 oil-feed, the conical surface 9 of sliding sleeve 5 is fixed on steel ball 10 extruding in the annular groove 8, making between piston rod 1 and the cylinder body 6 can not relative movement, thereby pins piston rod 1.
Unlocking operation: rod chamber 14 oil-feeds, when rodless cavity 12 and lock chambers 15 oil returns, the thrust that the thrust that hydraulic oil produces at first overcomes spring 4 promotes sliding sleeve 5 to left movement, the conical surface 9 and the steel ball 10 of sliding sleeve 5 disengage, steel ball 10 in the annular groove 8 of cylinder body 6 is replied free state, and this moment, oil hydraulic cylinder was separated open locking; The pressure that produces of hydraulic oil promotes piston 11 and piston rod 1 moves right again then, and in piston rod 1 retract cylinder 6, steel ball 10 moves right with piston 11.
Claims (3)
1. double self locking hydraulic cylinder, comprise the piston rod (1) that cylinder body (6) and dress can move freely within it, piston rod (1) tail end is equipped with piston (11), piston (11) is divided into rod chamber (14) and rodless cavity (12) with cylinder body (6), rod chamber (14) is by rod chamber hydraulic fluid port (20) turnover hydraulic oil, and rodless cavity (12) is by rodless cavity hydraulic fluid port (19) turnover hydraulic oil; The head end of cylinder body (6) is connected with cylinder head (2), in the cylinder body (6) of cylinder head (2) inboard, sliding sleeve (5) is installed, cylinder head (2) offers center hole with the center of sliding sleeve (5), the head end of piston rod (1) passes center hole, and the center hole sealed sliding on piston rod (1) and cylinder head (2), the sliding sleeve (5) movingly; It is characterized in that, in the cylinder body (6) along head end caudad direction be divided into first position (16) with first internal diameter (D1) and second position (13) with second internal diameter (D2), first internal diameter (D1) is greater than second internal diameter (D2); Cylinder head (2), sliding sleeve (5) sealing are assemblied in first position (16) of cylinder body (6), form lock chambers (15) between cylinder head (2), the sliding sleeve (5), and lock chambers (15) is by lock chambers hydraulic fluid port (21) turnover hydraulic oil; Between cylinder head (2), the sliding sleeve (5) spring (4) is housed, spring (4) one ends are pressed on the cylinder head (2), and the other end is pressed on sliding sleeve (5) on the interior edge face of first position (16); Center hole edge on the other end of described sliding sleeve (5) extends axially backward and forms an extension (7), the external diameter of extension (7) is less than second internal diameter (D1) of described cylinder body (6), the diameter of extension (7) tail end diminishes gradually, shrinks to form the conical surface (9); Be concaved with an annular groove (8) on the inwall at cylinder body (6) second positions (13), the transverse section of annular groove (8) is arc or semicircle; On the front-end face of piston (11), be provided with an annular cavity (22), the perisporium of annular cavity (22) is provided with a circular groove, be equipped with at least one steel ball (10) in the circular groove, the internal diameter of annular cavity (22) is greater than the external diameter of extension (7), extension (7) can be inserted annular cavity (22) and be contacted steel ball (10), the radius of steel ball (10) is less than the radius of described annular groove (8), and steel ball (10) can be contained in the annular groove (8).
2. double self locking hydraulic cylinder as claimed in claim 1, its feature also are, are concaved with cylinder head spring eye and the sliding sleeve spring eye that is used for putting spring (4) respectively on described cylinder head (2) and sliding sleeve (5) opposing end faces.
3. double self locking hydraulic cylinder as claimed in claim 1, its feature also is, described rodless cavity hydraulic fluid port (19), rod chamber hydraulic fluid port (20) and lock chambers hydraulic fluid port (21) are opened in the head end of piston rod (1), rodless cavity hydraulic fluid port (19) is communicated to oil hydraulic cylinder rodless cavity (12) by the rodless cavity oil duct (17) on the piston rod (1), rod chamber hydraulic fluid port (20) is communicated to oil hydraulic cylinder rod chamber (14) by the rod chamber oil duct (18) on the piston rod (1), and lock chambers hydraulic fluid port (21) is communicated to lock chambers (15) by the locking oil duct on the piston rod (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010121462 CN101782090A (en) | 2010-03-10 | 2010-03-10 | Double self locking hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010121462 CN101782090A (en) | 2010-03-10 | 2010-03-10 | Double self locking hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101782090A true CN101782090A (en) | 2010-07-21 |
Family
ID=42522218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010121462 Pending CN101782090A (en) | 2010-03-10 | 2010-03-10 | Double self locking hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101782090A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102032238A (en) * | 2011-01-17 | 2011-04-27 | 江阴市洪腾机械有限公司 | External control type self-locking hydraulic cylinder |
| CN102207116A (en) * | 2011-07-15 | 2011-10-05 | 四川大学 | Floating guide hydraulic cylinder |
| CN103511388A (en) * | 2013-09-17 | 2014-01-15 | 兰继红 | Lifting hydraulic cylinder used for electroplating suspension rod |
| CN106481613A (en) * | 2016-08-25 | 2017-03-08 | 北京冶自欧博科技发展有限公司 | A kind of machine liquid dual fail-safe locked hydraulic cylinder |
| CN108006007A (en) * | 2017-12-14 | 2018-05-08 | 中船重工中南装备有限责任公司 | Mechanical interlocking two-stage hydraulic cylinder |
| CN110939636A (en) * | 2019-11-21 | 2020-03-31 | 上海锡华机械工程有限公司 | Telescopic arm device |
| CN110979502A (en) * | 2019-11-21 | 2020-04-10 | 上海锡华机械工程有限公司 | Tower column climbing robot |
| CN112283198A (en) * | 2020-11-17 | 2021-01-29 | 山东益诚液压设备有限公司 | Mechanical self-locking spiral swinging oil cylinder |
| CN113357221A (en) * | 2021-06-29 | 2021-09-07 | 中船重工中南装备有限责任公司 | Steel ball type hydraulic cylinder with bidirectional mechanical locking |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB573033A (en) * | 1943-10-08 | 1945-11-02 | Dowty Equipment Ltd | Improvements in locking means for telescopic jacks |
| US4116113A (en) * | 1976-01-26 | 1978-09-26 | Wabco Westinghouse | Spring actuated brake cylinder device with fluid pressure operable release piston lockout means |
| US4989828A (en) * | 1990-07-25 | 1991-02-05 | Grumman Aerospace Corporation | Ball lock control valve actuation plunger-mechanical type |
| DE10343714A1 (en) * | 2003-09-20 | 2005-04-28 | Niemann Wolfgang | Lockable pneumatic cylinder |
| CN2851679Y (en) * | 2005-09-30 | 2006-12-27 | 北京市液压技术研究所 | Hydraulic cylinder with mechanical lock |
| CN101625003A (en) * | 2009-07-29 | 2010-01-13 | 贵州枫阳液压有限责任公司 | Two-stage locking cylinder |
| CN201391503Y (en) * | 2009-03-26 | 2010-01-27 | 江苏朝阳液压机械集团有限公司 | Hydraulic hoist oil cylinder |
| CN201407243Y (en) * | 2009-05-27 | 2010-02-17 | 陕西燎原国际航空制造有限公司 | Oil cylinder mechanical self-locking device |
| CN201636130U (en) * | 2010-03-10 | 2010-11-17 | 无锡市长江液压缸厂 | Dual self-locking hydraulic cylinder |
-
2010
- 2010-03-10 CN CN 201010121462 patent/CN101782090A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB573033A (en) * | 1943-10-08 | 1945-11-02 | Dowty Equipment Ltd | Improvements in locking means for telescopic jacks |
| US4116113A (en) * | 1976-01-26 | 1978-09-26 | Wabco Westinghouse | Spring actuated brake cylinder device with fluid pressure operable release piston lockout means |
| US4989828A (en) * | 1990-07-25 | 1991-02-05 | Grumman Aerospace Corporation | Ball lock control valve actuation plunger-mechanical type |
| DE10343714A1 (en) * | 2003-09-20 | 2005-04-28 | Niemann Wolfgang | Lockable pneumatic cylinder |
| CN2851679Y (en) * | 2005-09-30 | 2006-12-27 | 北京市液压技术研究所 | Hydraulic cylinder with mechanical lock |
| CN201391503Y (en) * | 2009-03-26 | 2010-01-27 | 江苏朝阳液压机械集团有限公司 | Hydraulic hoist oil cylinder |
| CN201407243Y (en) * | 2009-05-27 | 2010-02-17 | 陕西燎原国际航空制造有限公司 | Oil cylinder mechanical self-locking device |
| CN101625003A (en) * | 2009-07-29 | 2010-01-13 | 贵州枫阳液压有限责任公司 | Two-stage locking cylinder |
| CN201636130U (en) * | 2010-03-10 | 2010-11-17 | 无锡市长江液压缸厂 | Dual self-locking hydraulic cylinder |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102032238A (en) * | 2011-01-17 | 2011-04-27 | 江阴市洪腾机械有限公司 | External control type self-locking hydraulic cylinder |
| CN102032238B (en) * | 2011-01-17 | 2012-12-19 | 江阴市洪腾机械有限公司 | External control type self-locking hydraulic cylinder |
| CN102207116A (en) * | 2011-07-15 | 2011-10-05 | 四川大学 | Floating guide hydraulic cylinder |
| CN103511388A (en) * | 2013-09-17 | 2014-01-15 | 兰继红 | Lifting hydraulic cylinder used for electroplating suspension rod |
| CN106481613A (en) * | 2016-08-25 | 2017-03-08 | 北京冶自欧博科技发展有限公司 | A kind of machine liquid dual fail-safe locked hydraulic cylinder |
| CN108006007A (en) * | 2017-12-14 | 2018-05-08 | 中船重工中南装备有限责任公司 | Mechanical interlocking two-stage hydraulic cylinder |
| CN110939636A (en) * | 2019-11-21 | 2020-03-31 | 上海锡华机械工程有限公司 | Telescopic arm device |
| CN110979502A (en) * | 2019-11-21 | 2020-04-10 | 上海锡华机械工程有限公司 | Tower column climbing robot |
| CN112283198A (en) * | 2020-11-17 | 2021-01-29 | 山东益诚液压设备有限公司 | Mechanical self-locking spiral swinging oil cylinder |
| CN112283198B (en) * | 2020-11-17 | 2023-01-20 | 山东益诚液压设备有限公司 | Mechanical self-locking spiral swinging oil cylinder |
| CN113357221A (en) * | 2021-06-29 | 2021-09-07 | 中船重工中南装备有限责任公司 | Steel ball type hydraulic cylinder with bidirectional mechanical locking |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101782090A (en) | Double self locking hydraulic cylinder | |
| CN201636115U (en) | Mechanical self-locking hydraulic cylinder | |
| CN102032238B (en) | External control type self-locking hydraulic cylinder | |
| CN106402077B (en) | Hydraulic actuator class output speed controlled hydraulic circuit system | |
| CN201636116U (en) | Gap cushioning hydraulic cylinder | |
| CN201982411U (en) | External control type self-locking hydraulic cylinder | |
| CN105840303B (en) | A kind of variable-compression-ratio piston link assembly of excentric sleeve transmission | |
| CN103775431A (en) | Hydraulic cylinder capable of being locked at any position by using elastic sleeve | |
| CN201636130U (en) | Dual self-locking hydraulic cylinder | |
| CN111058848A (en) | Double-cylinder force-increasing splitter | |
| CN202946472U (en) | Small-flow fast-moving oil cylinder | |
| CN205669520U (en) | buffering structure of hydraulic cylinder | |
| CN206290519U (en) | Retractable actuating cylinder hydraulic circuit components | |
| CN105240343A (en) | Self-buffering-type gas-liquid mixing multi-stage ejection mechanism | |
| CN202073863U (en) | Differential pressure signaling structure for reversing of hydraulic cylinder | |
| CN101900148A (en) | Short-stroke pressure-maintaining high-pressure heavy hydraulic cylinder with high-pressure proximity switches | |
| CN110345129B (en) | Hydraulic cylinder | |
| CN202451514U (en) | Mechanical locking hydraulic cylinder | |
| CN207122531U (en) | Novel oil gas suspension cylinder | |
| CN103089746A (en) | Intelligent mechanical self-locking hydraulic device | |
| CN200940616Y (en) | Plunger hydraulic oil cylinder of braker | |
| CN211231094U (en) | Double-piston rod type hydraulic oil cylinder | |
| CN109764775A (en) | A kind of low impact firer's actuator | |
| CN201103307Y (en) | Fluid buffer for furniture | |
| CN204344571U (en) | A kind of steel ball locking hydraulic jack |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100721 |