CN108506278B - A kind of hydraulic cylinder - Google Patents
A kind of hydraulic cylinder Download PDFInfo
- Publication number
- CN108506278B CN108506278B CN201810236190.5A CN201810236190A CN108506278B CN 108506278 B CN108506278 B CN 108506278B CN 201810236190 A CN201810236190 A CN 201810236190A CN 108506278 B CN108506278 B CN 108506278B
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- China
- Prior art keywords
- piston
- cylinder body
- locking
- way valve
- hydraulic cylinder
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- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims description 13
- 230000009471 action Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 239000002828 fuel tank Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000002045 lasting effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000004044 response Effects 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
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/26—Locking mechanisms
-
- 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
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
This application provides a kind of hydraulic cylinders, including cylinder body, piston is equipped in cylinder body, piston rod is connected on piston, piston rod is equipped with several locking pieces, cylinder body is equipped with several columns locking device, it include several locking mechanisms in each column locking device, locking mechanism can realize the locking to piston rod by the locking to locking piece, the outside of cylinder body is equipped with tee one-way valve, first three-way connection and the second three-way connection, the outlet of tee one-way valve is connected to the inlet of each two-position three-way valve, first inlet of tee one-way valve, the rodless cavity end oil inlet and outlet of cylinder body passes through the first three-way connection and is connected to the first outlet of the reversal valve of hydraulic cylinder, second inlet of tee one-way valve, the oil inlet and outlet at the rod chamber end of cylinder body is connected to by second three-way connection with the second outlet of the reversal valve of hydraulic cylinder.The application, which is able to achieve piston rod and does not depend on rodless cavity in multiple pre-positions, keeps pressure to be held in position, easy to use.
Description
Technical field
The present invention relates to a kind of hydraulic cylinders.
Background technique
Hydraulic cylinder, which in use, after the completion of single movement is typically required, to stay for some time, such as without bar
Chamber oil inlet, piston motion and after driving piston rod fully extended, in order to guarantee the lasting powerful support to the object on piston rod,
It would generally continue pressure maintaining to rodless cavity, to apply lasting hydraulic coupling to piston, so that it is motionless to allow piston rod to stop, in this way, living
Stopper rod could be under stress condition in not retraction cylinder body.But also suffer from certain drawbacks in this way, i.e., due to needing rodless cavity to hold
Continuation of insurance pressure, to increase energy consumption to a certain extent, in addition, needed under certain operating conditions to rodless cavity long lasting for
Pressure maintaining, and this prolonged persistently pressure maintaining can bring certain damage to entire hydraulic system.Thus piston rod is had investigated to arrive
It can be locked using locking mechanism after up to designated position, hydraulic system is avoided to be in high pressure conditions for a long time, but it is existing
The hydraulic cylinder that can be realized this function be typically only capable to be locked in a position, it is poor for applicability.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of hydraulic cylinder, solves piston rod and does not need pressure and is also able to maintain
Only one defect of the predetermined position of positioning, piston is easy to loosen, problem inconvenient to use, poor for applicability.
In order to solve the above technical problems, the invention provides the following technical scheme:
A kind of hydraulic cylinder, including cylinder body, the cylinder body is interior to be equipped with piston, is connected with piston rod, the work on the piston
The periphery of stopper rod is equipped with the locking piece of several annular spreads, and the casing wall of the cylinder body is equipped with and the locking piece number phase
With several columns locking device, include several locking mechanisms in each column locking device, and several locking mechanisms are along the cylinder
The axis of body is arranged successively, and the locking mechanism can realize the locking to the piston rod by the locking to the locking piece,
The outside of the cylinder body is equipped with tee one-way valve, the first three-way connection and the second three-way connection, the outlet of the tee one-way valve
It is connected to the inlet of the two-position three-way valve of each locking mechanism, the first inlet of the tee one-way valve, the cylinder body
Rodless cavity end oil inlet and outlet is connected to by first three-way connection with the first outlet of the reversal valve of hydraulic cylinder, the threeway
Second inlet of check valve, the oil inlet and outlet at the rod chamber end of the cylinder body pass through second three-way connection and hydraulic cylinder
Reversal valve second outlet connection, when work, the liquid return hole of each two-position three-way valve is connected to by hose with fuel tank.
Further, the locking mechanism further includes ladder sliding block and third spring, the ladder sliding block be located at it is described
Stepped hole on the side wall of cylinder body is slidably matched, and the third spring is set on the small axis of the ladder sliding block, and described
Three springs are located between the big axial end of the ladder sliding block and the step surface of the stepped hole, the outlet of the two-position three-way valve
It is connected to the macropore of the stepped hole, sealing ring is equipped between the big axis of the ladder sliding block and the macropore of the stepped hole,
In, the stepped hole is connected to the cavity of the cylinder body, when the inlet of the two-position three-way valve, outlet conducting, high pressure liquid
Body pushes the ladder sliding block to avoid the locking piece locked to the small bore end of the stepped hole is mobile, when the two-bit triplet
When the liquid return hole of valve, outlet are connected, the ladder sliding block resets under the action of the third spring, and the locking piece can be locked
It is fixed.
Further, the locking piece includes stull, air supported head, second spring, and the stull is fixed at described
On the periphery of piston rod, and the stull is mutually perpendicular to the piston rod, and the free end of the stull is equipped with and the stull
Coaxial guide hole, the air supported head are slidably matched with the guide hole, and the second spring setting is led in the air supported head with described
Between the bottom surface in hole, the air supported head can extend into the aperture of the stepped hole locking for realizing the piston rod, wherein institute
The free end for stating stull is slidably matched with the corresponding guide groove on the inner wall for being located at the cylinder body.
Further, the number of the locking piece is two or three or four, and annular is uniformly distributed.
Further, the piston includes preceding partial piston, rear partial piston and taper sheath, the preceding partial piston, cone
Shape set, rear partial piston are sequentially sleeved on the end axis of the piston rod, the taper sheath by several annular spreads wedge shape
Item composition, the wedge-shaped bar are connect with the end face of the preceding partial piston, and the wedge-shaped bar can be moved along the radial direction of the piston
Dynamic, wedge-shaped bar push-in is located at by the conical bolt hole of the rear partial piston after being threadedly coupled with the male cone (strobilus masculinus) of the taper sheath
In corresponding limiting slot on the outer peripheral surface of the end axis.
Further, the end face of the preceding partial piston is equipped with T-slot, on the large end face of the wedge-shaped bar
T-shaped block is slidably matched with the T-slot.
Further, the piston further includes the first spring, first spring setting the taper sheath with it is described
Between the bottom surface of conical bolt hole.
Further, the outer end face of the rear partial piston is equipped with six holes in one, interior six holes and the piston
Coaxial arrangement.
Further, the number of the wedge-shaped bar is three or four.
It further, further include gasket, the preceding partial piston and the piston rod is arranged in the gasket
Between the shaft shoulder.
It can be seen from above-mentioned technical proposal the invention has the following advantages:
Due to being equipped with multiple locking mechanisms, thus piston rod can be protected in the case where rodless cavity no pressure in multiple positions
Lock state is held, easy to use, applicability is more preferable；
It is embedded in due to wedge-shaped bar in the limiting slot of piston rod, while the setting of the first spring avoids rear partial piston and taper
Set loosens, thus piston connection is reliable, it is not easy to the case where loosening.
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the structural schematic diagram of piston of the invention.
Fig. 3 is the connection schematic diagram of preceding partial piston and taper sheath of the invention.
Fig. 4 is the structural schematic diagram of locking mechanism of the invention.
Description of symbols: cylinder body 1, guide groove 11, stepped hole 12, piston 2, preceding partial piston 21, T-slot 211, rear part
Piston 22, conical bolt hole 221, interior six hole 222, taper sheath 23, wedge-shaped bar 231, T-shaped block 232, the first spring 24, piston rod 3,
Hold axis 31, limiting slot 32, locking piece 4, stull 41, guide hole 411, air supported head 42, second spring 43, locking mechanism 5, ladder sliding block
51, third spring 52, sealing ring 53, two-position three-way valve 54, tee one-way valve 6, the first three-way connection 7, the second three-way connection 8,
Gasket 9.
Specific embodiment
The embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention can be defined by the claims
Implement with the multitude of different ways of covering.
The application is described further below with reference to Fig. 1 to Fig. 4, a kind of hydraulic cylinder as shown in Figure 1 and Figure 4, including
Cylinder body 1, the cylinder body 1 is interior to be equipped with piston 2, piston rod 3 is connected on the piston 2, if the periphery of the piston rod 3 is equipped with
The locking piece 4 of dry annular spread, the casing wall of the cylinder body 1 is equipped with to be locked with the same number of several columns of the locking piece 4
Device, includes several locking mechanisms 5 in each column locking device, and several locking mechanisms 5 along the cylinder body 1 axis successively
Arrangement, the locking mechanism 5 can realize the locking to the piston rod 3 by the locking to the locking piece 4, realize multiple pre-
The use set is positioned, easy to use, the outside of the cylinder body 1 is equipped with tee one-way valve 6, the first three-way connection 7 and the second threeway
The outlet of connector 8, the tee one-way valve 6 is connected to the inlet of the two-position three-way valve 54 of each locking mechanism 5, the threeway
The setting of check valve 6 can ensure that the rodless cavity of the hydraulic cylinder or rod chamber are in the two-position three-way valve 54 when high pressure conditions
Inlet is all in high pressure conditions, the rodless cavity end oil inlet and outlet of the first inlet of the tee one-way valve 6, the cylinder body 1
Be connected to by first three-way connection 7 with the first outlet of the reversal valve of hydraulic cylinder, the tee one-way valve 6 second into
The oil inlet and outlet at the rod chamber end of liquid mouth, the cylinder body 1 passes through the of second three-way connection 8 and the reversal valve of hydraulic cylinder
Two outlets, when work, the liquid return hole of each two-position three-way valve 54 is connected to by hose with fuel tank.
As shown in Figures 2 and 3, the piston 2 includes preceding partial piston 21, rear partial piston 22, taper sheath 23 and first
Spring 24, the preceding partial piston 21, taper sheath 23, rear partial piston 22 are sequentially sleeved on the end axis 31 of the piston rod 3,
The taper sheath 23 is made of the wedge-shaped bar 231 of several annular spreads, the wedge-shaped bar 231 and the preceding partial piston 21
End face connection, and the wedge-shaped bar 231 can moving radially along the piston 2, it is described after partial piston 22 conical bolt hole 221
The wedge-shaped bar 231 push-in is located on the outer peripheral surface of the end axis 31 after being threadedly coupled with the male cone (strobilus masculinus) of the taper sheath 23
In corresponding limiting slot 32, first spring 24 is arranged between the taper sheath 23 and the bottom surface of the conical bolt hole 221.
The setting of first spring 24 is loosened in order to avoid the rear partial piston 22 with the taper sheath 23, and then avoids the wedge
Shape item 231 and the limiting slot 32 are detached from, and then the piston 2 is avoided to loosen, and the piston 2 is connect with the piston rod 3 can
It leans on, wherein the outer end face of partial piston 22 is equipped with six holes 222 in one after described, and interior six holes 222 and the piston 2 are same
Axis setting, the setting in interior six holes 222 facilitate the installation of the rear partial piston 22.
The end face of the preceding partial piston 21 is equipped with T-slot 211, the T shape on the large end face of the wedge-shaped bar 231
Block 232 is slidably matched with the T-slot 211.
Preferably, the number of the wedge-shaped bar 231 is three or four.
As shown in Figure 1 and Figure 4, the locking mechanism 5 further includes ladder sliding block 51 and third spring 52, the ladder sliding block
51 are slidably matched with the stepped hole 12 on the side wall of the cylinder body 1, and the third spring 52 is set in the ladder sliding block
On 51 small axis, and the third spring 52 is located at the big axial end of the ladder sliding block 51 and the step surface of the stepped hole 12
Between, the outlet of the two-position three-way valve 54 is connected to the macropore of the stepped hole 12, the big axis of the ladder sliding block 51 and institute
It states and is equipped with sealing ring 53 between the macropore of stepped hole 12, wherein the stepped hole 12 is connected to the cavity of the cylinder body 1, works as institute
When stating inlet, the outlet conducting of two-position three-way valve 54, highly pressurised liquid pushes the ladder sliding block 51 to the stepped hole 12
Small bore end is mobile to avoid the locking piece 4 locked, when the liquid return hole of the two-position three-way valve 54, outlet conducting, the rank
Terraced sliding block 51 resets under the action of third spring 52, and the locking piece 4 can be locked.
The locking piece 4 includes stull 41, air supported head 42, second spring 43, and the stull 41 is fixed at the work
On the periphery of stopper rod 3, and the stull 41 is mutually perpendicular to the piston rod 3, the free end of the stull 41 be equipped with it is described
The coaxial guide hole 411 of stull 41, the air supported head 42 are slidably matched with the guide hole 411, and the second spring 43 is arranged in institute
It states between air supported head 42 and the bottom surface of the guide hole 411, the air supported head 42 can extend into the aperture of the stepped hole 12 real
The locking of the existing piston rod 3, wherein the free end of the stull 41 is corresponding on the inner wall for being located at the cylinder body 1 to lead
Slot 11 is slidably matched.
Preferably, the number of the locking piece 4 is two or three or four, and annular is uniformly distributed.
Hydraulic cylinder further includes gasket 9, and the preceding partial piston 21 and the piston rod 3 is arranged in the gasket 9
Between the shaft shoulder, hydraulic cylinder pressure relief is avoided.
It is height at the inlet of the two-position three-way valve 54 of the locking mechanism 5 to the rodless cavity filling liquid of hydraulic cylinder when work
Pressure condition, and the inlet of all two-position three-way valves 54, outlet conducting, the ladder sliding block 51 are small to the stepped hole 12
Nose end movement avoids the air supported head 42 from entering in the aperture of the stepped hole 12, when the piston rod 3 will be at scheduled
When one predetermined position is held in position state, the movement of the two-position three-way valve 54 of corresponding locking mechanism 5 make liquid return hole, outlet be connected into
Row pressure release, the ladder sliding block 51 reset under the action of third spring 52, and the air supported head 42 can extend into corresponding
The locking that the piston rod 3 is realized in the aperture of stepped hole 12, after the completion of work, to the rod chamber filling liquid of hydraulic cylinder, the lock
Determine for high pressure conditions at the inlet of the two-position three-way valve 54 of mechanism 5, the two-position three-way valve 54 of corresponding position, which acts, makes feed liquor
Mouth, outlet conducting, the ladder sliding block 51 push the air supported head 42 to shrink, and the piston rod 3 can re-move, the course of work
Fast response time, and it is easy to operate, it is easy to use.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of hydraulic cylinder, which is characterized in that including cylinder body (1), be equipped with piston (2) in the cylinder body (1), the piston (2)
On be connected with piston rod (3), the periphery of the piston rod (3) is equipped with the locking piece (4) of several annular spreads, the locking
Part (4) includes stull (41), air supported head (42), second spring (43), and the stull (41) is fixed at the piston rod (3)
Periphery on, and the stull (41) is mutually perpendicular to the piston rod (3), the free end of the stull (41) be equipped with it is described
The coaxial guide hole (411) of stull (41), the air supported head (42) are slidably matched with the guide hole (411), the second spring
(43) it is arranged between the air supported head (42) and the bottom surface of the guide hole (411), the air supported head (42), which can extend into, to be located at
The locking of the piston rod (3) is realized in aperture on the side wall of the cylinder body (1), wherein the free end of the stull (41)
It is slidably matched with the corresponding guide groove (11) on the inner wall for being located at the cylinder body (1), the casing wall of the cylinder body (1) is equipped with and institute
The same number of several columns locking device of locking piece (4) is stated, includes several locking mechanisms (5) in each column locking device, and if
A dry locking mechanism (5) is arranged successively along the axis of the cylinder body (1), and the locking mechanism (5) can be by the locking piece
(4) locking to the piston rod (3) is realized in locking, and the locking mechanism (5) includes ladder sliding block (51), third spring
(52) and two-position three-way valve (54), the ladder sliding block (51) and the stepped hole (12) on the side wall for being located at the cylinder body (1) are sliding
Dynamic cooperation, the third spring (52) is set on the small axis of the ladder sliding block (51), and the third spring (52) is located at
Between the big axial end of the ladder sliding block (51) and the step surface of the stepped hole (12), the two-position three-way valve (54) goes out
Mouth is connected to the macropore of the stepped hole (12), between the big axis of the ladder sliding block (51) and the macropore of the stepped hole (12)
Equipped with sealing ring (53), wherein the stepped hole (12) is connected to the cavity of the cylinder body (1), sets on the outside of the cylinder body (1)
There are tee one-way valve (6), the first three-way connection (7) and the second three-way connection (8), the outlet of the tee one-way valve (6) and institute
State the inlet connection of two-position three-way valve (54), the first inlet of the tee one-way valve (6), the cylinder body (1) without bar
Chamber end oil inlet and outlet is connected to by first three-way connection (7) with the first outlet of the reversal valve of hydraulic cylinder, the threeway
Second inlet of check valve (6), the oil inlet and outlet at the rod chamber end of the cylinder body (1) pass through second three-way connection
(8) be connected to the second outlet of the reversal valve of hydraulic cylinder, when work, the liquid return hole of each two-position three-way valve (54) by hose with
Fuel tank connection.
2. hydraulic cylinder according to claim 1, which is characterized in that inlet, outlet when the two-position three-way valve (54)
When conducting, highly pressurised liquid pushes the small bore end movement of ladder sliding block (51) the Xiang Suoshu stepped hole (12) to avoid the locking piece
(4) it is locked, when the liquid return hole of the two-position three-way valve (54), outlet conducting, the ladder sliding block (51) is in the third
Spring resets under the action of (52), and the locking piece (4) can be locked.
3. hydraulic cylinder according to claim 1, which is characterized in that the number of the locking piece (4) be two or three or
Four, and annular is uniformly distributed.
4. hydraulic cylinder according to claim 1, which is characterized in that the piston (2) includes preceding partial piston (21), rear portion
Divide piston (22) and taper sheath (23), the preceding partial piston (21), taper sheath (23), rear partial piston (22) are sequentially sleeved at
On the end axis (31) of the piston rod (3), the taper sheath (23) is made of the wedge-shaped bar (231) of several annular spreads, institute
It states wedge-shaped bar (231) to connect with the end face of the preceding partial piston (21), and the wedge-shaped bar (231) can be along the piston (2)
Move radially, it is described after the conical bolt hole (221) of partial piston (22) be threadedly coupled with the male cone (strobilus masculinus) of the taper sheath (23)
The wedge-shaped bar (231) push-in is located in the corresponding limiting slot (32) on the outer peripheral surface of the end axis (31) afterwards.
5. hydraulic cylinder according to claim 4, which is characterized in that the end face of the preceding partial piston (21) is equipped with T shape
Slot (211), the T-shaped block (232) being located on the large end face of the wedge-shaped bar (231) are slidably matched with the T-slot (211).
6. hydraulic cylinder according to claim 4, which is characterized in that the piston (2) further includes the first spring (24), described
First spring (24) is arranged between the taper sheath (23) and the bottom surface of the conical bolt hole (221).
7. hydraulic cylinder according to claim 4, which is characterized in that the outer end face of partial piston (22) is equipped with one after described
Interior six hole (222), interior six holes (222) and the piston (2) are coaxially disposed.
8. hydraulic cylinder according to claim 4, which is characterized in that the number of the wedge-shaped bar (231) is three or four.
9. hydraulic cylinder according to claim 4, which is characterized in that it further include gasket (9), gasket (9) setting
Between the preceding partial piston (21) and the shaft shoulder of the piston rod (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810236190.5A CN108506278B (en) | 2018-03-21 | 2018-03-21 | A kind of hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810236190.5A CN108506278B (en) | 2018-03-21 | 2018-03-21 | A kind of hydraulic cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108506278A CN108506278A (en) | 2018-09-07 |
| CN108506278B true CN108506278B (en) | 2019-10-11 |
Family
ID=63377944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810236190.5A Active CN108506278B (en) | 2018-03-21 | 2018-03-21 | A kind of hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108506278B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006226522A (en) * | 2005-01-21 | 2006-08-31 | Pubot Giken:Kk | Locking device |
| CN103742482A (en) * | 2014-01-15 | 2014-04-23 | 鞍钢股份有限公司 | Crystallizer hydraulic cylinder pneumatic locking mechanism and application method thereof |
| CN204213102U (en) * | 2014-10-31 | 2015-03-18 | 长沙中联消防机械有限公司 | The hydraulic control system of locking cylinder, locking cylinder and engineering machinery |
| CN105114389A (en) * | 2015-07-27 | 2015-12-02 | 柳州柳工液压件有限公司 | Hydraulic oil cylinder |
-
2018
- 2018-03-21 CN CN201810236190.5A patent/CN108506278B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006226522A (en) * | 2005-01-21 | 2006-08-31 | Pubot Giken:Kk | Locking device |
| CN103742482A (en) * | 2014-01-15 | 2014-04-23 | 鞍钢股份有限公司 | Crystallizer hydraulic cylinder pneumatic locking mechanism and application method thereof |
| CN204213102U (en) * | 2014-10-31 | 2015-03-18 | 长沙中联消防机械有限公司 | The hydraulic control system of locking cylinder, locking cylinder and engineering machinery |
| CN105114389A (en) * | 2015-07-27 | 2015-12-02 | 柳州柳工液压件有限公司 | Hydraulic oil cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108506278A (en) | 2018-09-07 |
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