CN210440320U - Mechanical locking hydraulic oil cylinder - Google Patents
Mechanical locking hydraulic oil cylinder Download PDFInfo
- Publication number
- CN210440320U CN210440320U CN201921562468.4U CN201921562468U CN210440320U CN 210440320 U CN210440320 U CN 210440320U CN 201921562468 U CN201921562468 U CN 201921562468U CN 210440320 U CN210440320 U CN 210440320U
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- block
- fixedly connected
- oil cylinder
- mechanical locking
- stopper
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- Withdrawn - After Issue
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- 239000010720 hydraulic oil Substances 0.000 title claims abstract description 47
- 239000007788 liquid Substances 0.000 claims abstract description 50
- 239000003921 oil Substances 0.000 claims abstract description 24
- 230000007306 turnover Effects 0.000 abstract description 19
- 238000000034 method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 2
- 210000003781 tooth socket Anatomy 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
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Abstract
The utility model discloses a mechanical locking hydraulic cylinder belongs to hydraulic cylinder technical field. A mechanical locking hydraulic oil cylinder comprises an oil cylinder body and a piston column, wherein the piston column is connected in the oil cylinder body in a sliding manner, a first liquid inlet and outlet and a second liquid inlet and outlet are fixedly connected to the oil cylinder body, a first connecting block is fixedly connected to the first liquid inlet and outlet, a second connecting block is fixedly connected to the second liquid inlet and outlet, connecting stop blocks are respectively connected in the first connecting block and the second connecting block in a sliding manner, and driving ports are formed in the connecting stop blocks; the utility model discloses in when the control piston post slides, can be when control adds hydraulic oil to one side business turn over liquid mouth, control opposite side business turn over liquid mouth is opened, the discharge of the opposite side business turn over liquid mouth hydraulic oil of being convenient for, when not needing the control piston post to slide, business turn over liquid mouth is automatic closed, can fix the piston post through the tooth's socket simultaneously, multiple fixed locking, locking is effectual.
Description
Technical Field
The utility model relates to a hydraulic cylinder technical field especially relates to a mechanical locking hydraulic cylinder.
Background
The hydraulic cylinder is a hydraulic actuating element which converts hydraulic energy into mechanical energy and does linear reciprocating motion or swinging motion, has simple structure and reliable work, can omit a speed reducer when realizing reciprocating motion, has no transmission clearance and moves stably, thereby being widely applied to hydraulic systems of various machines, and the output force of the hydraulic cylinder is in direct proportion to the effective area of a piston and the pressure difference between the two sides of the piston.
The locking of the hydraulic cylinder is to enable the hydraulic cylinder to stop at any position and is not influenced by external force.
The existing hydraulic cylinder locking methods are various, a locking loop of a hydraulic control one-way valve is commonly used, a piston rod is fixed by using the oil pressure of hydraulic oil in an oil cylinder, the hydraulic oil can deteriorate after being used for a long time, and the piston rod can be instantly dropped due to insufficient pressure of the hydraulic oil; if the tightness in the hydraulic loop is in fault, hydraulic oil leakage can be caused, and further, the pressure of the hydraulic machine is insufficient in the using process, and the working efficiency of the hydraulic cylinder is not high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems that the existing hydraulic cylinder locking methods are various, the common locking loop adopts a hydraulic control one-way valve, the piston rod is fixed by using the oil pressure of the hydraulic oil in the oil cylinder, the hydraulic oil can deteriorate after being used for a long time, and the piston rod can be instantly lowered due to insufficient pressure of the hydraulic oil; if the tightness in the hydraulic loop is in fault, hydraulic oil leakage can be caused, and further the problems that the pressure of the hydraulic machine is insufficient and the working efficiency of the hydraulic cylinder is not high in the using process are caused, so that the mechanical locking hydraulic oil cylinder is provided.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a mechanical locking hydraulic oil cylinder comprises an oil cylinder body and a piston column, wherein the piston column is connected in the oil cylinder body in a sliding manner, a first liquid inlet and outlet and a second liquid inlet and outlet are fixedly connected to the oil cylinder body, a first connecting block is fixedly connected to the first liquid inlet and outlet, a second connecting block is fixedly connected to the second liquid inlet and outlet, connecting stop blocks are respectively and slidably connected to the first connecting block and the second connecting block, a driving port is formed in each connecting stop block, a fixing baffle is fixedly connected to one end, far away from the driving port, of each connecting stop block, a second spring is fixedly connected to one end, close to the driving port, of each fixing baffle, and one ends, far away from the fixing baffle, of the two second springs are respectively and fixedly connected to the first connecting block and the second connecting block;
fixedly connected with outer fixed plate on the hydro-cylinder body, sliding connection has interior slide in the outer fixed plate, the equal fixedly connected with inner fixed block in both ends of interior slide, inner fixed block is located the one end that the hydro-cylinder body was kept away from to the slide, be equipped with third stopper, spacing groove on the inner fixed block, the one end that fixed stop kept away from and connects the dog is equipped with first stopper, second stopper, first stopper is fixed continuous with the second stopper, first stopper and third stopper phase-match, second stopper and spacing groove phase-match.
Preferably, fixedly connected with head rod on the piston post, the piston post is connected with the second connecting rod through first connecting rod, second connecting rod sliding connection is on the outer wall of hydro-cylinder body, be equipped with first tooth's socket on the second connecting rod, be equipped with the second tooth's socket on the interior slide, second tooth's socket and first tooth's socket phase-match.
Preferably, the second connecting rod is positioned between the oil cylinder body and the inner sliding plate.
Preferably, one end of the inner fixing block, which is far away from the inner sliding plate, is fixedly connected with a first spring, and one end of the first spring, which is far away from the inner fixing block, is fixedly connected to the outer fixing plate.
Preferably, the number of the first springs on one side is 2-4.
Preferably, the drive port is wedge-shaped.
Preferably, one end of the fixed baffle far away from the connecting stop block is fixedly connected with a limit connecting block, and the limit connecting block is fixedly connected with the first limit block.
Preferably, the connection stopper, the first connecting block and the second connecting block are connected by a sealing rubber gasket, and the connection stopper is fixedly connected with the sealing rubber gasket.
Preferably, a cushion pad is fixedly connected to one side of the fixed baffle close to the inner fixed block.
Preferably, the joint of the inner sliding plate and the outer fixing plate is provided with a non-slip mat.
Compared with the prior art, the utility model provides a mechanical locking hydraulic cylinder possesses following beneficial effect:
1. when the mechanical locking hydraulic oil cylinder is used, a piston column slides in an oil cylinder body, a first liquid inlet and outlet and a second liquid inlet and outlet are externally connected with a hydraulic oil pipe, hydraulic oil is injected to the left side of the piston column in the oil cylinder body through the first liquid inlet and outlet, a driving port is wedge-shaped when the hydraulic oil passes through a first connecting block, and then a connecting stop block is pushed by the driving port to move towards the direction close to an inner fixing block, and the hydraulic oil enters the oil cylinder body through the first connecting block;
in the process of moving the connecting stop block, the fixed baffle, the limiting connecting block, the first limiting block and the second limiting block are driven to move towards the direction close to the inner fixed block, the second spring extends, the first limiting block drives the inner fixed block to slide downwards through the third limiting block, the inner fixed block drives the inner sliding plate to slide downwards, and the first spring is compressed;
when the inner sliding plate slides downwards, the inner fixed block on the side of the second connecting block is driven to slide, the first spring is compressed, the inner fixed block drives the second limiting block to move towards the direction close to the inner fixed block through the limiting groove, the second limiting block drives the first limiting block, the limiting connecting block, the fixed baffle and the connecting stop block to move towards the direction close to the inner fixed block, the second spring extends, and hydraulic pressure on the right side of the piston column can be discharged through the second liquid inlet and outlet;
after the hydraulic oil is added and discharged, the connecting stop block and the inner fixed block reset under the action of the first spring and the second spring, the sealing rubber gasket arranged on the connecting stop block can improve the sealing performance of the connecting stop block, and the first liquid inlet and outlet and the second liquid inlet and outlet are blocked to prevent the hydraulic oil from being discharged;
the device can control the opposite side business turn over liquid mouth to open when control is passed in and out the liquid mouth and is added hydraulic oil to one side when sliding at the control piston post, and the discharge of the opposite side business turn over liquid mouth hydraulic oil of being convenient for, when need not control the piston post and slide, business turn over liquid mouth self-closing, and then the piston post can be locked, and locking effect is good.
2. According to the mechanical locking hydraulic oil cylinder, in the process of controlling the piston column to slide, the piston column can drive the second connecting rod to slide through the first connecting rod, the second connecting rod slides between the oil cylinder body and the inner sliding plate, the second connecting rod is prevented from shaking, and the inner sliding plate moves downwards when the piston column is controlled to slide, add and remove hydraulic oil, so that the second connecting rod can slide conveniently;
when the piston post stop motion, under the effect of first spring, second spring, connect dog, interior fixed block and reset, in the second tooth's socket on the interior slide is gone into to first tooth's socket card on the second connecting rod, the slipmat that interior slide and outer fixed plate's junction was equipped with for the piston post is fixed by the locking, and is fixed effectual.
3. This mechanical locking hydraulic cylinder, first spring quantity is 3, and the effect that resets of first spring is better.
4. This mechanical locking hydraulic cylinder is equipped with the blotter on the fixed stop, can prevent when the fixed stop removes, and with the collision damage of inner fixed block.
The device does not relate to the part and all is the same with prior art or can adopt prior art to realize, the utility model discloses in when control piston post slides, can be when control adds hydraulic oil to one side business turn over liquid mouth, control opposite side business turn over liquid mouth is opened, the discharge of the opposite side business turn over liquid mouth hydraulic oil of being convenient for, when not needing control piston post to slide, business turn over liquid mouth is automatic closed, can fix the piston post through the tooth's socket simultaneously, multiple fixed locking, locking is effectual.
Drawings
Fig. 1 is a schematic structural view of a mechanical locking hydraulic cylinder provided by the present invention;
fig. 2 is a schematic cross-sectional structure view of a mechanical locking hydraulic cylinder provided by the present invention;
fig. 3 is a schematic structural diagram of a portion a in fig. 2 of a mechanical locking hydraulic cylinder according to the present invention;
fig. 4 is a schematic structural diagram of a first connecting rod of a mechanical locking hydraulic cylinder according to the present invention;
fig. 5 is a schematic structural view of a connection stopper of a mechanical locking hydraulic cylinder according to the present invention;
fig. 6 is the utility model provides a structural schematic diagram of mechanical locking hydraulic cylinder's inner fixed block.
In the figure: 1. an oil cylinder body; 101. a piston post; 102. a first liquid inlet and outlet; 1021. a first connection block; 103. a second liquid inlet and outlet; 1031. a second connecting block; 2. an outer fixing plate; 201. a first spring; 202. an inner fixed block; 2021. a third limiting block; 2022. a limiting groove; 203. an inner slide plate; 2031. a second tooth slot; 3. connecting a stop block; 3001. a drive port; 301. fixing a baffle plate; 302. a second spring; 303. a first stopper; 304. a second limiting block; 305. a limiting connecting block; 4. a first connecting rod; 401. a second connecting rod; 4011. a first tooth slot.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Example 1:
referring to fig. 1-6, a mechanical locking hydraulic cylinder comprises a cylinder body 1 and a piston column 101, wherein the piston column 101 is slidably connected in the cylinder body 1, a first liquid inlet and outlet 102 and a second liquid inlet and outlet 103 are fixedly connected on the cylinder body 1, a first connecting block 1021 is fixedly connected on the first liquid inlet and outlet 102, a second connecting block 1031 is fixedly connected on the second liquid inlet and outlet 103, a connecting block 3 is slidably connected in the first connecting block 1021 and the second connecting block 1031, a driving port 3001 is arranged on the connecting block 3, a fixing baffle 301 is fixedly connected at one end of the connecting block 3 far away from the driving port 3001, a second spring 302 is fixedly connected at one end of the fixing baffle 301 near the driving port 3001, and one ends of the two second springs 302 far away from the fixing baffle 301 are fixedly connected on the first connecting block 1021 and the second connecting block 1031 respectively;
fixedly connected with outer fixed plate 2 on the hydro-cylinder body 1, slide plate 203 in outer fixed plate 2 internal sliding connection, fixed block 202 in the equal fixedly connected with in both ends of interior slide plate 203, interior fixed block 202 is located the one end that hydro-cylinder body 1 was kept away from to slide plate 203, be equipped with third stopper 2021 on the interior fixed block 202, spacing groove 2022, the one end that connection dog 3 was kept away from to fixed stop 301 is equipped with first stopper 303, second stopper 304, first stopper 303 is fixed continuous with second stopper 304, first stopper 303 and third stopper 2021 phase-match, second stopper 304 and spacing groove 2022 phase-match.
One end of the inner fixing block 202 far away from the inner sliding plate 203 is fixedly connected with a first spring 201, and one end of the first spring 201 far away from the inner fixing block 202 is fixedly connected to the outer fixing plate 2.
The drive port 3001 is wedge-shaped.
The fixed baffle 301 is far away from the spacing connecting block 305 of one end fixedly connected with of connecting dog 3, and spacing connecting block 305 is fixed continuous with first stopper 303.
The joints of the connecting stopper 3, the first connecting block 1021 and the second connecting block 1031 are both sealed by hands, and the connecting stopper 3 is fixedly connected with the sealed rubber pad.
When the hydraulic oil injection device is used, the piston column 101 slides in the oil cylinder body 1, the first liquid inlet and outlet 102 and the second liquid inlet and outlet 103 are externally connected with a hydraulic oil pipe, hydraulic oil is injected to the left side of the piston column 101 in the oil cylinder body 1 through the first liquid inlet and outlet 102, when the hydraulic oil passes through the first connecting block 1021, the driving port 3001 is wedge-shaped, the connecting block 3 is pushed to move towards the direction close to the inner fixing block 202 through the driving port 3001, and the hydraulic oil enters the oil cylinder body 1 through the first connecting block 1021;
in the process that the connecting stopper 3 moves, the fixed baffle 301, the limiting connecting block 305, the first limiting block 303 and the second limiting block 304 are driven to move towards the direction close to the inner fixed block 202, the second spring 302 extends, the first limiting block 303 drives the inner fixed block 202 to slide downwards through the third limiting block 2021, then the inner fixed block 202 drives the inner sliding plate 203 to slide downwards, and the first spring 201 is compressed;
when the inner sliding plate 203 slides downwards, the inner fixing block 202 on the second connecting block 1031 side is driven to slide, the first spring 201 is compressed, and then the inner fixing block 202 drives the second limiting block 304 to move towards the direction close to the inner fixing block 202 through the limiting groove 2022, so that the second limiting block 304 drives the first limiting block 303, the limiting connecting block 305, the fixed baffle plate 301 and the connecting baffle 3 to move towards the direction close to the inner fixing block 202, the second spring 302 extends, and hydraulic pressure on the right side of the piston column 101 can be discharged through the second liquid inlet/outlet 103;
after the hydraulic oil is added and discharged, the connecting block 3 and the inner fixed block 202 reset under the action of the first spring 201 and the second spring 302, the sealing rubber gasket arranged on the connecting block 3 can improve the sealing performance of the connecting block 3, and the first liquid inlet and outlet 102 and the second liquid inlet and outlet 103 are blocked to prevent the hydraulic oil from being discharged;
the device can be when control piston post 101 slides, when control added hydraulic oil to one side business turn over liquid mouth, and control opposite side business turn over liquid mouth and open, the discharge of the business turn over liquid mouth hydraulic oil of the opposite side of being convenient for, when need not control piston post 101 and slide, business turn over liquid mouth self-closing, and then piston post 101 can be locked, and locking effect is good.
Example 2:
referring to fig. 1 to 6, a mechanical locking hydraulic cylinder is substantially the same as that of embodiment 1, further, a first connecting rod 4 is fixedly connected to the piston column 101, the piston column 101 is connected to a second connecting rod 401 through the first connecting rod 4, the second connecting rod 401 is slidably connected to the outer wall of the cylinder body 1, a first tooth groove 4011 is arranged on the second connecting rod 401, a second tooth groove 2031 is arranged on the inner sliding plate 203, and the second tooth groove 2031 is matched with the first tooth groove 4011.
The second connecting rod 401 is located between the cylinder body 1 and the inner slide plate 203.
The joint of the inner sliding plate 203 and the outer fixing plate 2 is provided with a non-slip mat.
In the process of controlling the piston column 101 to slide, the piston column 101 drives the second connecting rod 401 to slide through the first connecting rod 4, the second connecting rod 401 slides between the oil cylinder body 1 and the inner sliding plate 203, and the second connecting rod 401 is prevented from shaking, so that the inner sliding plate 203 moves downwards when the piston column 101 is controlled to slide, add and remove hydraulic oil, and the second connecting rod 401 can slide conveniently;
when the piston column 101 stops moving, under the action of the first spring 201 and the second spring 302, the connecting stop block 3 and the inner fixing block 202 reset, the first tooth socket 4011 on the second connecting rod 401 is clamped into the second tooth socket 2031 on the inner sliding plate 203, and the anti-slip pad is arranged at the joint of the inner sliding plate 203 and the outer fixing plate 2, so that the piston column 101 is locked and fixed, and the fixing effect is good;
example 3:
referring to fig. 1-6, a mechanical locking hydraulic cylinder, substantially the same as in example 2, and further, the number of the one-sided first springs 201 is 2-4.
The number of the first springs 201 is 3, and the resetting effect of the first springs 201 is better.
Example 4:
referring to fig. 1 to 6, a mechanical locking hydraulic cylinder is substantially the same as that of embodiment 2, and further, a cushion pad is fixedly connected to one side of the fixed baffle 301 close to the inner fixed block 202.
The fixed baffle 301 is provided with a cushion pad, which can prevent the fixed baffle 301 from colliding with the inner fixed block 202 and being damaged when moving.
The utility model discloses in can be when control piston post 101 slides, can be when control adds hydraulic oil to one side business turn over liquid mouth, control opposite side business turn over liquid mouth is opened, the discharge of the opposite side business turn over liquid mouth hydraulic oil of being convenient for, when not needing control piston post 101 to slide, business turn over liquid mouth is automatic closed, can fix piston post 101 through the tooth's socket simultaneously, multiple fixed locking, locking is effectual.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (10)
1. A mechanical locking hydraulic oil cylinder comprises an oil cylinder body (1) and a piston column (101), wherein the piston column (101) is connected in the oil cylinder body (1) in a sliding manner, the oil cylinder body (1) is fixedly connected with a first liquid inlet and outlet (102) and a second liquid inlet and outlet (103), the mechanical locking hydraulic oil cylinder is characterized in that the first liquid inlet and outlet (102) is fixedly connected with a first connecting block (1021), the second liquid inlet and outlet (103) is fixedly connected with a second connecting block (1031), the first connecting block (1021) and the second connecting block (1031) are both connected in a sliding manner with a connecting stop block (3), the connecting stop block (3) is provided with a driving port (3001), one end of the connecting stop (3) far away from the driving port (3001) is fixedly connected with a fixed baffle (301), one end of the fixed baffle (301) close to the driving port (3001) is fixedly connected with a second spring (302), one ends of the two second springs (302) far away from the fixed baffle (301) are respectively and fixedly connected to the first connecting block (1021) and the second connecting block (1031);
fixedly connected with outer fixed plate (2) on hydro-cylinder body (1), sliding connection has interior slide (203) in outer fixed plate (2), fixed block (202) in the equal fixedly connected with in both ends of interior slide (203), interior fixed block (202) are located the one end that hydro-cylinder body (1) was kept away from in slide (203), be equipped with third stopper (2021), spacing groove (2022) on interior fixed block (202), the one end that connection dog (3) were kept away from in fixed stop (301) is equipped with first stopper (303), second stopper (304), first stopper (303) are fixed continuous with second stopper (304), first stopper (303) and third stopper (2021) phase-match, second stopper (304) and spacing groove (2022) phase-match.
2. The mechanical locking hydraulic oil cylinder according to claim 1, characterized in that a first connecting rod (4) is fixedly connected to the piston column (101), a second connecting rod (401) is connected to the piston column (101) through the first connecting rod (4), the second connecting rod (401) is slidably connected to the outer wall of the oil cylinder body (1), a first tooth groove (4011) is formed in the second connecting rod (401), a second tooth groove (2031) is formed in the inner sliding plate (203), and the second tooth groove (2031) is matched with the first tooth groove (4011).
3. A mechanical locking hydraulic ram according to claim 2, characterized in that the second connecting rod (401) is located between the ram body (1) and the inner slide (203).
4. A mechanical locking hydraulic oil cylinder according to claim 3, characterized in that one end of the inner fixing block (202) far away from the inner sliding plate (203) is fixedly connected with a first spring (201), and one end of the first spring (201) far away from the inner fixing block (202) is fixedly connected on the outer fixing plate (2).
5. A mechanical locking hydraulic ram according to claim 4, characterized in that the number of said first springs (201) on one side is 2-4.
6. A mechanical locking hydraulic ram according to claim 1, characterized in that the drive port (3001) is wedge-shaped.
7. A mechanical locking hydraulic oil cylinder according to claim 6, characterized in that one end of the fixed baffle (301) far away from the connecting stop block (3) is fixedly connected with a limit connecting block (305), and the limit connecting block (305) is fixedly connected with the first limit block (303).
8. The mechanical locking hydraulic oil cylinder according to claim 1, characterized in that the joints of the connecting stopper (3) and the first connecting block (1021) and the second connecting block (1031) are both sealed rubber pads, and the connecting stopper (3) is fixedly connected with the sealed rubber pads.
9. A mechanical locking hydraulic oil cylinder as claimed in claim 1, characterized in that a cushion pad is fixedly connected to the side of the fixed baffle (301) close to the inner fixed block (202).
10. A mechanical locking hydraulic cylinder according to claim 1, characterized in that the joint of the inner sliding plate (203) and the outer fixing plate (2) is provided with a non-slip mat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921562468.4U CN210440320U (en) | 2019-09-19 | 2019-09-19 | Mechanical locking hydraulic oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921562468.4U CN210440320U (en) | 2019-09-19 | 2019-09-19 | Mechanical locking hydraulic oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210440320U true CN210440320U (en) | 2020-05-01 |
Family
ID=70411073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921562468.4U Withdrawn - After Issue CN210440320U (en) | 2019-09-19 | 2019-09-19 | Mechanical locking hydraulic oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210440320U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110500335A (en) * | 2019-09-19 | 2019-11-26 | 泰安市力华液压设备有限公司 | A kind of mechanical interlocking hydraulic cylinder |
-
2019
- 2019-09-19 CN CN201921562468.4U patent/CN210440320U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110500335A (en) * | 2019-09-19 | 2019-11-26 | 泰安市力华液压设备有限公司 | A kind of mechanical interlocking hydraulic cylinder |
| CN110500335B (en) * | 2019-09-19 | 2024-05-10 | 泰安市力华液压设备有限公司 | Mechanical locking hydraulic cylinder |
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Granted publication date: 20200501 Effective date of abandoning: 20240510 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200501 Effective date of abandoning: 20240510 |