CN108999832A - A kind of self locking hydraulic cylinder - Google Patents
A kind of self locking hydraulic cylinder Download PDFInfo
- Publication number
- CN108999832A CN108999832A CN201810873544.7A CN201810873544A CN108999832A CN 108999832 A CN108999832 A CN 108999832A CN 201810873544 A CN201810873544 A CN 201810873544A CN 108999832 A CN108999832 A CN 108999832A
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- China
- Prior art keywords
- piston rod
- framework
- self
- locking
- inner cylinder
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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
-
- 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
- F15B15/26—Locking mechanisms
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
Present patent application is related to technical field of hydraulic equipment, discloses a kind of self locking hydraulic cylinder, including outer cylinder, inner cylinder tube and piston rod, sliding slot is offered on the inner wall of inner cylinder tube, and self-lock pin is equipped in sliding slot, and piston rod is equipped with the self-locking grooves of cooperation self-lock pin；Locking device is additionally provided in outer cylinder, locking device includes framework, sprocket wheel chain mechanism and idler wheel, and grip block is slidably connected in framework, and support rod is slidably connected in framework, and one end that support rod stretches out framework is equipped with rack gear；Idler wheel offsets with piston rod, and idler wheel is connect with one of sprocket coaxiality of sprocket wheel chain mechanism, another sprocket coaxiality of sprocket wheel chain mechanism is connected with gear, and the rack gear on gear and support rod is intermeshed.Hydraulic cylinder piston rod will appear retract action, the protection of locking device opened self-locking, and grip block carries out radial direction to piston rod and grips, to overcome the retract action of piston rod, piston rod be made to be maintained at current location steady operation.
Description
Technical field
The present invention relates to technical field of hydraulic equipment more particularly to a kind of self locking hydraulic cylinders.
Background technique
Hydraulic cylinder is a kind of critical elements being widely used in modern industry Hydraulic Industry, and hydraulic cylinder is to turn hydraulic energy
Become mechanical energy, do the hydraulic actuator of straight reciprocating motion (or pendulum motion), its structure is simple, reliable operation.With
Hydraulic cylinder when realizing reciprocating motion, can remove deceleration device from, and not have drive gap, and movement is steady, therefore in various machines
It is used widely in the hydraulic system of tool.
In hydraulic cylinder works, after hydraulic cylinder piston rod stretches out, need piston rod steady operation in current location, it can neither
Stretching can not retract, i.e., usually said is self-locking, all be by hydraulicdirectional control valve to realize this function on traditional technology
Median Function realize self-locking or use hydraulic lock, but due to the leakage of valve, self-locking effect is not ideal enough, or even in lifting
In the large-scale engineering machineries such as machine, excavator, it may appear that engineering accident.
Summary of the invention
The purpose of the present invention is to provide a kind of self locking hydraulic cylinders, are realized in the prior art using hydraulicdirectional control valve with overcoming
Self-locking, self-locking effect is poor, the not high problem of safety coefficient.
In order to achieve the above objectives, basic scheme of the invention is as follows: a kind of self locking hydraulic cylinder, including outer cylinder, inner cylinder tube
And piston rod, the inner cylinder tube are fixedly mounted in outer cylinder, and piston, piston rod one end and work are slidably connected in inner cylinder tube
Plug is fixedly connected, and the piston rod other end passes through outer cylinder and inner cylinder tube, and piston rod is matched with outer cylinder and inner cylinder tube sliding respectively
It closes, sliding slot is offered on the inner wall of the inner cylinder tube, the sealing plate for sealing sliding slot is equipped at the notch of the sliding slot, it is described
Slide plate is slidably connected in sliding slot, and sliding slot is divided into first chamber and second chamber by slide plate, on the side wall of the inner cylinder tube
Equipped with the oiling channel being connected to first chamber, the bottom of the slide plate and sliding slot is connected with the first spring, consolidates on the slide plate
Dingan County is equipped with self-lock pin, and the self-lock pin partially protrudes into inner cylinder tube far from slide plate, and the piston rod is equipped with cooperation certainly
The self-locking grooves of lock pin；Locking device is additionally provided in the outer cylinder, the locking device includes framework and sprocket wheel chain mechanism, institute
Piston rod is stated through framework and is slidably matched with framework, and two regions will be divided into framework, each region is equipped with locking
Structure, locking mechanism include the grip block being slidably matched with framework, and the bottom surface of the grip block and framework is connected with second spring,
Support rod is slidably connected in the framework, the support rod is protruded into framework and is fixedly connected with grip block, and the support rod is stretched
One end of framework is equipped with rack gear out；Hinge bar is hinged in the framework, the hinge bar and framework hinged place are equipped with torsional spring, institute
It states hinge bar and is rotatably connected to idler wheel far from one end of framework, the side of the idler wheel offsets with piston rod always, the idler wheel
It is connect with one of sprocket coaxiality of sprocket wheel chain mechanism, another sprocket coaxiality connection of the sprocket wheel chain mechanism is with teeth
Rack gear on wheel, the gear and support rod is intermeshed.
It is as follows using the working principle of this base case: in use, piston rod is protruding, at the first spring in sliding slot
It offsets always with piston rod in the self-lock pin in compressive state, inner cylinder tube, when piston rod reaches certain position, self-lock pin exists
It under the action of the elastic force of first spring, is engaged in the self-locking grooves on piston rod, sealed, realization level-one lock is carried out to piston rod
It closes.Meanwhile intracorporal two grip blocks of frame of locking device can be in piston rod stretching under the elastic force effect of second spring
The part of cylinder barrel is clamped, to piston rod play it is radial grip, realize second level it is sealed, finally make piston rod stablize work
Make in current location.
When hydraulic cylinder after working for a long time, hydraulic cylinder piston rod will appear retract action, i.e. piston rod will appear
The phenomenon that being slided into inner cylinder tube.At this point, locking device opened self-locking is protected, the torsional spring being connected between hinge bar and framework,
So that the idler wheel of hinged boom end offsets with piston rod always, sliding drives idler wheel rotation, idler wheel rotation in piston rod inner cylinder tube
The sprocket wheel rotation in the sprocket wheel chain mechanism engaged is driven, so that sprocket wheel chain mechanism starts running, it is another
A sprocket wheel rotates with it, so that the gear engaged be driven to start turning, gear rotation drives the support rod hair engaged
Raw movement, support rod in the process of moving, squeezes grip block, so that upper and lower two grip blocks are to piston rod
It clamps stronger, to overcome the retract action of piston rod, self-lock protection is carried out to piston rod, is maintained at piston rod still
Current location steady operation.
This programme the utility model has the advantages that 1, work when, self-lock pin is engaged to piston rod under the action of the elastic force of the first spring
On self-locking grooves in, to piston rod carry out it is sealed, realize level-one it is sealed.2, intracorporal two grip blocks of the frame of locking device,
Under the elastic force effect of second spring, the part that can stretch out inner cylinder tube to piston rod is clamped, and radial folder is played to piston rod
Fixation is held, realizes that second level is sealed.3, when retract action occurs in piston rod, piston rod is sensed with the idler wheel that piston rod offsets
It is mobile, by sprocket wheel chain mechanism and gear, so that support rod is mobile and squeezes grip block, so that upper and lower two folders
It is stronger to the clamping of piston rod to hold plate, to overcome the retract action of piston rod, self-lock protection is carried out to piston rod, makes to live
Stopper rod is still maintained at current location steady operation.4, this programme structure is simple, and self-locking effect is good, and safety coefficient is high.
Further, rubber layer is coated on the grip block.Increase the frictional force between grip block and piston rod, thus more
Effectively overcome the retract action of piston rod.
Further, the grip block is arc-shaped.It is bonded grip block sufficiently with piston rod surface, is conducive to grip block pair
Piston rod grips, to overcome the retract action of piston rod.
Further, the diameter of the gear is greater than the diameter of the sprocket wheel in sprocket wheel chain mechanism.Play the work of stroke amplification
With when small retract action occurs in piston rod, support rod can be squeezed grip block, make grip block to piston rod
It grips, to overcome the retract action of piston rod in time.
Further, drawstring is connected on the hinge bar.When unlock, by pulling drawstring, make idler wheel disengaging and piston rod
Mutual conflict, reduce grip block to the sealed of piston rod, so that hydraulic cylinder realizes unlock.
Further, rubber layer is coated on the idler wheel.The frictional force for increasing idler wheel and piston rod, prevents skidding
Phenomenon overcomes the retract action of piston rod so that locking device is sealed to piston rod progress in time.
Detailed description of the invention
Fig. 1 is a kind of cross-sectional view of self locking hydraulic cylinder of the embodiment of the present invention；
Fig. 2 is the cross-sectional view of inner cylinder tube of the embodiment of the present invention；
Fig. 3 is the structural schematic diagram of locking device of the embodiment of the present invention.
Specific embodiment
Below by specific embodiment, the present invention is described in further detail:
Appended drawing reference in Figure of description include: outer cylinder 1, inner cylinder tube 2, piston 21, piston rod 22, self-locking grooves 23,
It is locking device 3, sliding slot 4, first chamber 41, second chamber 42, oiling channel 43, slide plate 5, self-lock pin 51, the first spring 52, close
Sealing plate 53, framework 6, grip block 61, second spring 62, support rod 63, rack gear 64, sprocket wheel chain mechanism 7, sprocket wheel 71, gear 72,
Hinge bar 8, torsional spring 81, idler wheel 9.
Embodiment is basic as shown in attached drawing 1 to 3: a kind of self locking hydraulic cylinder, including outer cylinder 1, inner cylinder tube 2 and piston rod
22, inner cylinder tube 2 is fixedly mounted in outer cylinder 1.Piston 21,22 one end of piston rod and piston 21 are slidably connected in inner cylinder tube 2
Be fixedly connected, 22 other end of piston rod pass through outer cylinder 1 and inner cylinder tube 2, and piston rod 22 respectively with outer cylinder 1 and inner cylinder tube 2
It is slidably matched.Sliding slot 4 is offered on the inner wall of inner cylinder tube 2, and the sealing plate 53 for sealing sliding slot 4 is equipped at the notch of sliding slot 4,
Slide plate 5 is slidably connected in sliding slot 4, and sliding slot 4 is divided into first chamber 41 and second chamber 42, the side of inner cylinder tube 2 by slide plate 5
Wall is equipped with the oiling channel 43 being connected to first chamber 41, and the first spring 52, the first spring are equipped between slide plate 5 and sliding slot 4
52 both ends are connect with slide plate 5 and 4 bottom end of sliding slot respectively.5 upper surface of slide plate is fixedly installed with self-lock pin 51, and self-lock pin 51 is far from sliding
Plate 5 partially protrudes into inner cylinder tube 2, and piston rod 22 is equipped with self-locking grooves 23, and self-lock pin 51 can be extend into self-locking grooves 23.Outside
Be additionally provided with locking device 3 in cylinder barrel 1, locking device 3 includes framework 6 and sprocket wheel chain mechanism 7, piston rod 22 through framework 6 and
It is slidably matched with framework 6.Piston rod 22 will be divided into two regions in framework 6, each region is equipped with locking mechanism.Locking mechanism
Including the grip block 61 being slidably matched with framework, the bottom surface of grip block 61 and framework 6 is connected with second spring 62, slides in framework 6
Dynamic to be connected with support rod 63, support rod 63 is protruded into framework 6 and is fixedly connected with grip block 61, and support rod 63 stretches out the one of framework 6
End is equipped with rack gear 64；Hinge bar 8 is hinged in framework 6, hinge bar 8 and 6 hinged place of framework are equipped with torsional spring 81, and hinge bar 8 is separate
One end of framework 6 is rotatably connected to idler wheel 9, and the side of idler wheel 9 offsets with piston rod 22 always, idler wheel 9 and sprocket wheel chain mechanism 7
One of sprocket wheel 71 it is coaxially connected, another sprocket wheel 71 of sprocket wheel chain mechanism 7 is coaxially connected with gear 72, gear 72 with
Rack gear 64 on support rod 63 is intermeshed.
Specifically, rubber layer is coated on grip block 61 and idler wheel 9.The diameter of gear 72 is greater than sprocket wheel chain mechanism
The diameter of sprocket wheel 71 in 7.
This programme specific embodiment is as follows: in use, piston rod 22 is protruding, at the first spring 52 in sliding slot 4
It offsets always with piston rod 22 in the self-lock pin 51 in compressive state, inner cylinder tube 2, when piston rod 22 reaches certain position,
Self-lock pin 51 is engaged in the self-locking grooves 23 on piston rod 22 under the action of the elastic force of the first spring 52, to piston rod 22 into
Row is sealed, realizes that level-one is sealed.Meanwhile two grip blocks 61 in the framework 6 of locking device 3, in the elastic force of second spring 62
Under effect, the part that can stretch out inner cylinder tube 2 to piston rod 22 be clamped, to piston rod 22 play it is radial grip, it is real
Existing second level is sealed, finally makes 22 steady operation of piston rod in current location.
When hydraulic cylinder after working for a long time, hydraulic cylinder piston rod 22 will appear retract action, i.e. 22 meeting of piston rod
There is the phenomenon that sliding into inner cylinder tube 2.At this point, 3 opened self-locking of locking device is protected, it is connected between hinge bar 8 and framework 6
Torsional spring 81 so that the idler wheel 9 of 8 end of hinge bar offsets with piston rod 22 always, piston rod 22 slides drive rolling in cylinder barrel 2
9 rotation of wheel, the rotation of idler wheel 9 drives a sprocket wheel 71 rotation in the sprocket wheel chain mechanism 7 engaged, so that sprocket chain
Mechanism 7 starts running, another sprocket wheel 71 rotates with it, so that the gear 72 engaged is driven to start turning, gear 72
Rotation drives the support rod 63 engaged to move, and support rod 63 in the process of moving, squeezes grip block 61,
So that upper and lower two grip blocks 61 are stronger to the clamping of piston rod 22, thus overcome the retract action of 21 bar of piston,
Self-lock protection is carried out to piston rod 22, piston rod 22 is made still to be maintained at current location steady operation.
It needs to be unlocked piston rod 22 after hydraulic cylinder works, by the oiling channel 43 of 2 side wall of inner cylinder tube
Interior injection hydraulic oil, until hydraulic oil fills first chamber 41, hydraulic oil squeezes the slide plate 5 in sliding slot 4, works as hydraulic coupling
Greater than the first spring 52 elastic force when, be locked together in self-lock pin 51 in self-locking grooves 23 and inwardly bounce back, be detached from the lock to piston rod 22
It closes.Meanwhile hinge bar 8 is pulled by drawstring, so that the idler wheel 9 on hinge bar 8 is no longer offseted with piston rod 22, so that support
Bar 63 releases the extruding to grip block 61, and grip block 61 significantly reduces the clamping action of piston rod 22, to release piston
Bar 22 carries out self-lock protection, and hydraulic cylinder realizes unlock.
What has been described above is only an embodiment of the present invention, and the common sense such as well known specific structure and characteristic are not made herein in scheme
Excessive description.It, without departing from the structure of the invention, can be with it should be pointed out that for those skilled in the art
Several modifications and improvements are made, these also should be considered as protection scope of the present invention, these all will not influence what the present invention was implemented
Effect and patent practicability.The scope of protection required by this application should be based on the content of the claims, in specification
The records such as specific embodiment can be used for explaining the content of claim.
Claims (6)
1. a kind of self locking hydraulic cylinder, it is characterised in that: including outer cylinder, inner cylinder tube and piston rod, the fixed peace of the inner cylinder tube
In outer cylinder, piston is slidably connected in inner cylinder tube, piston rod one end is fixedly connected with the piston, and the piston rod other end passes through
Outer cylinder and inner cylinder tube, and piston rod is slidably matched with outer cylinder and inner cylinder tube respectively, offers on the inner wall of the inner cylinder tube
Sliding slot is equipped with the sealing plate for sealing sliding slot at the notch of the sliding slot, slidably connects slide plate, and slide plate in the sliding slot
Sliding slot is divided into first chamber and second chamber, it is logical that the side wall of the inner cylinder tube is equipped with the oiling being connected to first chamber
The bottom of road, the slide plate and sliding slot is connected with the first spring, and self-lock pin is fixedly installed on the slide plate, and the self-lock pin is remote
From partially protruding into inner cylinder tube for slide plate, the piston rod is equipped with the self-locking grooves of cooperation self-lock pin；In the outer cylinder also
Equipped with locking device, the locking device includes framework and sprocket wheel chain mechanism, and the piston rod is through framework and sliding with framework
Dynamic cooperation, and two regions will be divided into framework, each region is equipped with locking mechanism, and locking mechanism includes sliding with framework
The bottom surface of the grip block of cooperation, the grip block and framework is connected with second spring, slidably connects support rod in the framework,
The support rod is protruded into framework and is fixedly connected with grip block, and one end that the support rod stretches out framework is equipped with rack gear；The frame
Hinge bar is hinged on body, the hinge bar and framework hinged place are equipped with torsional spring, and the hinge bar is rotated far from one end of framework
It is connected with idler wheel, the side of the idler wheel offsets with piston rod always, one of chain of the idler wheel and sprocket wheel chain mechanism
Take turns coaxially connected, another sprocket coaxiality of the sprocket wheel chain mechanism is connected with gear, the tooth on the gear and support rod
Item intermeshing.
2. a kind of self locking hydraulic cylinder according to claim 1, it is characterised in that: be coated with rubber layer on the grip block.
3. a kind of self locking hydraulic cylinder according to claim 2, it is characterised in that: the grip block is arc-shaped.
4. a kind of self locking hydraulic cylinder according to claim 3, it is characterised in that: the diameter of the gear is greater than sprocket wheel chain
The diameter of sprocket wheel in mechanism.
5. a kind of self locking hydraulic cylinder according to claim 4, it is characterised in that: be connected with drawstring on the hinge bar.
6. a kind of self locking hydraulic cylinder according to claim 5, it is characterised in that: be coated with rubber layer on the idler wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810873544.7A CN108999832B (en) | 2018-08-02 | 2018-08-02 | Self-locking hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810873544.7A CN108999832B (en) | 2018-08-02 | 2018-08-02 | Self-locking hydraulic cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108999832A true CN108999832A (en) | 2018-12-14 |
| CN108999832B CN108999832B (en) | 2020-05-12 |
Family
ID=64594955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810873544.7A Active CN108999832B (en) | 2018-08-02 | 2018-08-02 | Self-locking hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108999832B (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109353064A (en) * | 2018-12-24 | 2019-02-19 | 无锡蓝力智能装备有限公司 | Hydraulic press total travel locking mechanism |
| CN110107467A (en) * | 2019-05-13 | 2019-08-09 | 哈尔滨工程大学 | Hydraulic type vibratory energy recycle device and deceleration strip energy recycling system |
| CN111550540A (en) * | 2020-05-20 | 2020-08-18 | 张述成 | Rotary driving device |
| CN111561491A (en) * | 2020-04-29 | 2020-08-21 | 苏州鑫旭合智能科技有限公司 | Internal and external combined mechanical self-locking hydraulic cylinder |
| CN112046609A (en) * | 2020-07-07 | 2020-12-08 | 阜阳常阳汽车部件有限公司 | Truck frame with rear-end collision protection function |
| CN112943744A (en) * | 2021-02-01 | 2021-06-11 | 许志业 | Novel sealing device for hydraulic cylinder |
| CN114278643A (en) * | 2021-12-31 | 2022-04-05 | 山东福阳液压科技有限公司 | Automobile hydraulic cylinder with self-locking function |
| CN116044861A (en) * | 2023-04-03 | 2023-05-02 | 烟台星辉劳斯堡液压机械有限公司 | Retractile position self-locking hydraulic cylinder |
| CN116146179A (en) * | 2023-02-14 | 2023-05-23 | 西安蓝水泵业有限公司 | Carbon fiber rod type logging cable injection system and process |
| CN116201788A (en) * | 2023-04-28 | 2023-06-02 | 沧州精跃液压油缸制造有限公司 | Single-action multistage hydraulic cylinder self-locking device |
| CN116538171A (en) * | 2023-07-03 | 2023-08-04 | 南安市泉信液压机械有限公司 | Hydraulic cylinder locking mechanism |
| CN116875788A (en) * | 2023-07-17 | 2023-10-13 | 南通华东油压科技有限公司 | Aging treatment device for multi-loop hydraulic cylinder casting |
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| CN202247831U (en) * | 2011-08-05 | 2012-05-30 | 四川宏华石油设备有限公司 | Locking device and hydraulic control system thereof |
| CN106593998A (en) * | 2016-12-08 | 2017-04-26 | 泸州长江液压密封件有限公司 | Hydraulic cylinder capable of realizing self-locking through elastic part |
| CN107035742A (en) * | 2017-06-21 | 2017-08-11 | 张多艳 | A kind of novel hydraulic cylinder |
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2018
- 2018-08-02 CN CN201810873544.7A patent/CN108999832B/en active Active
Patent Citations (3)
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| CN202247831U (en) * | 2011-08-05 | 2012-05-30 | 四川宏华石油设备有限公司 | Locking device and hydraulic control system thereof |
| CN106593998A (en) * | 2016-12-08 | 2017-04-26 | 泸州长江液压密封件有限公司 | Hydraulic cylinder capable of realizing self-locking through elastic part |
| CN107035742A (en) * | 2017-06-21 | 2017-08-11 | 张多艳 | A kind of novel hydraulic cylinder |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109353064A (en) * | 2018-12-24 | 2019-02-19 | 无锡蓝力智能装备有限公司 | Hydraulic press total travel locking mechanism |
| CN110107467A (en) * | 2019-05-13 | 2019-08-09 | 哈尔滨工程大学 | Hydraulic type vibratory energy recycle device and deceleration strip energy recycling system |
| CN110107467B (en) * | 2019-05-13 | 2021-01-08 | 哈尔滨工程大学 | Hydraulic vibration energy recovery device and deceleration strip energy recovery system |
| CN111561491A (en) * | 2020-04-29 | 2020-08-21 | 苏州鑫旭合智能科技有限公司 | Internal and external combined mechanical self-locking hydraulic cylinder |
| CN111550540A (en) * | 2020-05-20 | 2020-08-18 | 张述成 | Rotary driving device |
| CN112046609B (en) * | 2020-07-07 | 2023-08-15 | 阜阳常阳汽车部件有限公司 | Truck frame with rear-end collision protection function |
| CN112046609A (en) * | 2020-07-07 | 2020-12-08 | 阜阳常阳汽车部件有限公司 | Truck frame with rear-end collision protection function |
| CN112943744A (en) * | 2021-02-01 | 2021-06-11 | 许志业 | Novel sealing device for hydraulic cylinder |
| CN114278643A (en) * | 2021-12-31 | 2022-04-05 | 山东福阳液压科技有限公司 | Automobile hydraulic cylinder with self-locking function |
| CN116146179A (en) * | 2023-02-14 | 2023-05-23 | 西安蓝水泵业有限公司 | Carbon fiber rod type logging cable injection system and process |
| CN116146179B (en) * | 2023-02-14 | 2024-04-02 | 陕西航天德林科技集团有限公司 | Carbon fiber rod type logging cable injection system and process |
| CN116044861A (en) * | 2023-04-03 | 2023-05-02 | 烟台星辉劳斯堡液压机械有限公司 | Retractile position self-locking hydraulic cylinder |
| CN116044861B (en) * | 2023-04-03 | 2023-06-23 | 烟台星辉劳斯堡液压机械有限公司 | Retractile position self-locking hydraulic cylinder |
| CN116201788A (en) * | 2023-04-28 | 2023-06-02 | 沧州精跃液压油缸制造有限公司 | Single-action multistage hydraulic cylinder self-locking device |
| CN116538171A (en) * | 2023-07-03 | 2023-08-04 | 南安市泉信液压机械有限公司 | Hydraulic cylinder locking mechanism |
| CN116538171B (en) * | 2023-07-03 | 2023-09-15 | 南安市泉信液压机械有限公司 | Hydraulic cylinder locking mechanism |
| CN116875788A (en) * | 2023-07-17 | 2023-10-13 | 南通华东油压科技有限公司 | Aging treatment device for multi-loop hydraulic cylinder casting |
| CN116875788B (en) * | 2023-07-17 | 2024-04-02 | 南通华东油压科技有限公司 | Aging treatment device for multi-loop hydraulic cylinder casting |
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| Publication number | Publication date |
|---|---|
| CN108999832B (en) | 2020-05-12 |
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