CN214788320U - Multi-stroke oil cylinder device - Google Patents
Multi-stroke oil cylinder device Download PDFInfo
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- CN214788320U CN214788320U CN202121034550.7U CN202121034550U CN214788320U CN 214788320 U CN214788320 U CN 214788320U CN 202121034550 U CN202121034550 U CN 202121034550U CN 214788320 U CN214788320 U CN 214788320U
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- 230000002457 bidirectional effect Effects 0.000 claims abstract description 24
- 238000007789 sealing Methods 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model discloses a multi-stroke oil cylinder device. The device comprises a main oil cylinder, an outer protecting pipe, an inner protecting pipe and an auxiliary oil cylinder; the main oil cylinder, the outer protecting pipe, the inner protecting pipe and the auxiliary oil cylinder are sequentially connected; one end of the piston rod penetrates into the main cylinder barrel to be connected with the main cylinder piston, and the other end of the piston rod penetrates through the inner protection pipe to penetrate into the auxiliary cylinder barrel to be connected with the auxiliary cylinder piston; the inner oil pipe is arranged in the inner protecting pipe, one end of the inner oil pipe is connected with the axial oil hole I on the main cylinder cover, and the other end of the inner oil pipe is connected with the axial oil hole II on the auxiliary cylinder cover; one end of an outer oil pipe of the main cylinder is connected with the bidirectional hydraulic lock, the other end of the outer oil pipe of the main cylinder is connected with a through hole II on the main cylinder, and the through hole I on the main cylinder is connected with an inlet and an outlet of the bidirectional hydraulic lock; one end of the auxiliary cylinder outer oil pipe is connected with the bidirectional hydraulic lock, and the other end of the auxiliary cylinder outer oil pipe is connected with a through hole III in the auxiliary cylinder barrel. The utility model discloses satisfied follower multistation reliable work in the mechanism, low in manufacturing cost, control simple, use the requirement that the maintenance cost is low, ensured low-cost, the high quality operation of follower in the mechanism.
Description
Technical Field
The utility model relates to a hydro-cylinder field, specificly relate to a hydro-cylinder device of multi-stroke.
Background
In construction engineering machinery, a large number of transmission mechanisms with oil cylinders as driving parts have the advantages of simple structure, large transmission force, small volume, good automatic control performance and the like, and are widely applied. However, for the accurate realization of multiple stations of a driven part in the mechanism, servo control is often needed, so that the manufacturing cost of the transmission mechanism is increased, and meanwhile, a hydraulic control system is also complex, so that the use and maintenance cost in the future is increased.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a multi-stroke oil cylinder device satisfies the reliable work of follower multistation in the mechanism, low in manufacturing cost, control simple, use the requirement that the maintenance cost is low, ensures low-cost, the high quality operation of follower in the mechanism.
In order to realize the utility model discloses a purpose, the utility model discloses a technical scheme be: the multi-stroke oil cylinder device comprises a main oil cylinder, an outer protecting pipe, an inner protecting pipe and an auxiliary oil cylinder; the main oil cylinder is assembled into an integral structure by a main cylinder barrel and a main cylinder cover, and the auxiliary oil cylinder is assembled into an integral structure by an auxiliary cylinder barrel and an auxiliary cylinder cover; one end of the main oil cylinder is provided with a connecting piece, the other end of the main oil cylinder is fixedly connected with one end of the outer protecting pipe, the other end of the outer protecting pipe is connected with the outer edge of the inner protecting pipe in a sliding and sealing mode, one end of the inner protecting pipe extends into the outer protecting pipe, the other end of the inner protecting pipe extends out of the outer protecting pipe and is fixedly connected with one end of the auxiliary oil cylinder, and the other end of the auxiliary oil cylinder is provided with a connecting piece; one end of the piston rod penetrates through the main cylinder cover and then penetrates into the main cylinder barrel and is fixedly connected with a main cylinder piston in the main cylinder barrel, and the other end of the piston rod penetrates through the inner protection pipe and the auxiliary cylinder cover and then penetrates into the auxiliary cylinder barrel and is fixedly connected with an auxiliary cylinder piston in the auxiliary cylinder barrel; the inner oil pipe is arranged in the inner protecting pipe, one end of the inner oil pipe is connected with an axial oil hole I arranged on the main cylinder cover, and the other end of the inner oil pipe is connected with an axial oil hole II arranged on the auxiliary cylinder cover; a rod cavity I of the main oil cylinder is communicated with a rod cavity II of the auxiliary oil cylinder through an inner oil pipe; one end of an outer oil pipe of the main cylinder is connected with the bidirectional hydraulic lock, the other end of the outer oil pipe of the main cylinder is connected with a through hole II which is arranged on the main cylinder barrel and is close to the end of a main cylinder cover, and a rodless cavity I in the main cylinder is connected with the bidirectional hydraulic lock through a through hole I which is arranged on the main cylinder barrel; one end of an auxiliary cylinder outer oil pipe is connected with the bidirectional hydraulic lock, and the other end of the auxiliary cylinder outer oil pipe is connected with a through hole III which is arranged on the auxiliary cylinder barrel and communicated with the rodless cavity II.
Preferably, in the multi-stroke oil cylinder device, the piston rod and the master cylinder piston are fixed by the locking nut; the piston rod and the auxiliary cylinder piston are fixed through a locking nut.
Preferably, in the multi-stroke cylinder device, the main cylinder, the auxiliary cylinder and the piston rod are coaxial.
Preferably, in the multi-stroke cylinder device, the connecting pieces at the two ends of the main cylinder and the auxiliary cylinder can be the same or different, and the connecting pieces are selected from a single lug plate, a double lug plate or a threaded rod.
Preferably, in the multi-stroke cylinder device, the bidirectional hydraulic lock is provided with 6 inlets and outlets: p1, P2, P3, P4, P5 and P6, and three pilot-controlled check valves K1, K2 and K3; the inlet and outlet P1, the hydraulic control one-way valve K1 and the inlet and outlet P4 form a group of oil passages, the inlet and outlet P2, the hydraulic control one-way valve K2 and the inlet and outlet P5 form a group of oil passages, the inlet and outlet P3, the hydraulic control one-way valve K3 and the inlet and outlet P6 form a group of oil passages, and the inlet and outlet P4 of the bidirectional hydraulic lock is communicated with the rodless cavity I of the main oil cylinder through a through hole I in the main cylinder; an inlet and an outlet P5 of the bidirectional hydraulic lock are communicated with a rod cavity I of the master cylinder through an outer oil pipe of the master cylinder and a through hole II on a master cylinder barrel; an inlet and an outlet P6 of the bidirectional hydraulic lock are communicated with a rodless cavity II of the auxiliary oil cylinder through an auxiliary cylinder outer oil pipe and a through hole III on the auxiliary cylinder barrel.
Preferably, in the multi-stroke oil cylinder device, the inner oil pipe is a flexible high-pressure rubber pipe.
Preferably, in the multi-stroke oil cylinder device, part or all of the oil pipe outside the auxiliary cylinder is a flexible high-pressure rubber pipe.
Preferably, in the multi-stroke cylinder device, the strokes of the main cylinder and the auxiliary cylinder may be the same or different.
The utility model has the advantages that:
1. the utility model discloses, through the fuel feeding of the different oil inlets of two-way hydraulic lock, can realize a plurality of limit strokes, be favorable to a plurality of reliable stations of follower in the mechanism, the practicality is strong.
2. The utility model discloses, compact structure is simple, low in manufacturing cost.
3. The utility model discloses, control system is simple, and stability is good, and control cost is low.
4. The utility model discloses, the piston rod protectiveness is good, hydro-cylinder long service life.
Drawings
Fig. 1 is a schematic structural diagram of the multi-stroke cylinder device of the present invention.
Fig. 2 is the hydraulic control principle schematic diagram of the bidirectional hydraulic lock of the utility model.
Fig. 3 is a schematic view of the utility model discloses the connecting piece at hydro-cylinder both ends is single otic placode connection.
Fig. 4 is the connecting piece at both ends of the oil cylinder of the utility model is a schematic view of double lug plate connection.
Fig. 5 is the connecting piece at both ends of the oil cylinder of the utility model is a threaded rod connection schematic diagram.
Detailed Description
As shown in fig. 1 to 5, the multi-stroke cylinder device includes a main cylinder 1, an outer protection tube 2, an inner protection tube 3, an auxiliary cylinder 4, a connector 5, a piston rod 6, an inner oil tube 7, a main cylinder outer oil tube 8, a two-way hydraulic lock 9, an auxiliary cylinder outer oil tube 10, a lock nut 11 and a pipe joint 12.
The main oil cylinder 1 is assembled into an integral structure by a main cylinder barrel 1-1 and a main cylinder cover 1-2. A main cylinder piston 1-3 is arranged in a main cylinder barrel 1-1, the main cylinder piston 1-3 is in sealed sliding connection with the main cylinder barrel 1-1, the main cylinder piston 1-3 divides an inner cavity of the main cylinder barrel 1-1 into a rod cavity I1-5 and a rodless cavity I1-6, a through hole I1-7 is formed in one end of the rodless cavity I1-6 of the main cylinder barrel 1-1, a through hole II 1-8 is formed in one end of the rod cavity I1-5, close to a main cylinder cover 1-2, and an axial oil hole I1-4 is formed in the main cylinder cover 1-2.
The auxiliary oil cylinder 4 is assembled into an integral structure by an auxiliary cylinder barrel 4-1 and an auxiliary cylinder cover 4-2. An auxiliary cylinder piston 4-3 is arranged in the auxiliary cylinder barrel 4-1, the auxiliary cylinder piston 4-3 is in sealed sliding connection with the auxiliary cylinder barrel 4-1, the auxiliary cylinder piston 4-3 divides an inner cavity of the auxiliary cylinder barrel 4-1 into a rod cavity II 4-5 and a rodless cavity II 4-6, one end of the rodless cavity II 4-6 on the auxiliary cylinder barrel 4-1 is provided with a through hole III 4-7, and an axial oil hole II 4-4 is formed in the auxiliary cylinder cover 4-2.
One end of the main oil cylinder 1 is fixedly connected with one end of the outer protecting pipe 2, and can be fixedly connected in a threaded or welding mode. The other end of the outer protecting pipe 2 is connected with the outer edge of the inner protecting pipe 3 in a sliding and sealing way. One end of the inner protection pipe 3 goes deep into the outer protection pipe 2, the other end of the inner protection pipe extends out of the outer protection pipe 2 and is fixedly connected with one end of the auxiliary oil cylinder 4, and the inner protection pipe 3 and the auxiliary oil cylinder 4 can be fixedly connected in a threaded or welded mode.
And connecting pieces 5 are respectively arranged at two ends of the main oil cylinder 1 and the auxiliary oil cylinder 4. In order to facilitate connection with other devices, as shown in fig. 3, the connecting member 5 may employ a single ear plate with both ends; as shown in fig. 4, the connecting member 5 may be a double-lug plate with both ends; as shown in fig. 5, the connecting member 5 may be a threaded rod having both ends. The connecting pieces 5 at the two ends of the main oil cylinder 1 and the auxiliary oil cylinder 4 can adopt the same structure or different structures according to actual conditions.
One end of the piston rod 6 penetrates through the main cylinder cover 1-2 and then penetrates into the main cylinder barrel 1-1 and is fixedly connected with the main cylinder piston 1-3. Preferably, one end of the piston rod 6 passes through the master cylinder pistons 1-3 and is fixed by a lock nut 11. The other end of the piston rod 6 penetrates through the inner protection pipe 3 and the auxiliary cylinder cover 4-2 and then goes deep into the auxiliary cylinder barrel 4-1 to be fixedly connected with the auxiliary cylinder piston 4-3. Preferably, the other end of the piston rod 6 passes through the auxiliary cylinder piston 4-3 and is fixed by a locking nut 11. The main oil cylinder 1, the auxiliary oil cylinder 4 and the piston rod 6 are coaxial.
The inner oil pipe 7 is arranged in the inner protective pipe 3, one end of the inner oil pipe is connected with an axial oil hole I1-4 arranged on the main cylinder cover 1-2 through a pipe joint 12, and the other end of the inner oil pipe is connected with an axial oil hole II 4-4 arranged on the auxiliary cylinder cover 4-2 through a pipe joint 12; the rod cavity I1-5 of the main oil cylinder 1 is communicated with the rod cavity II 4-5 of the auxiliary oil cylinder 4 through an inner oil pipe 7. Preferably, the inner oil pipe 7 is a flexible high-pressure rubber hose.
One end of an outer oil pipe 8 of the main cylinder is connected with a bidirectional hydraulic lock 9, and the other end of the outer oil pipe of the main cylinder is connected with a through hole II 1-8 arranged on a main cylinder barrel 1-1. The main cylinder barrel 1-1 is connected with a bidirectional hydraulic lock 9 through a through hole I1-7 communicated with the rodless cavity I1-6. One end of an auxiliary cylinder outer oil pipe 10 is connected with the bidirectional hydraulic lock 9, and the other end of the auxiliary cylinder outer oil pipe is connected with a through hole III 4-7 which is arranged on the auxiliary cylinder barrel 4-1 and communicated with the rodless cavity II 4-6. Preferably, part or all of the auxiliary cylinder outer oil pipe 10 is a flexible high-pressure rubber hose.
The lengths of the flexible high-pressure rubber hoses of the inner oil pipe 7 and the auxiliary cylinder outer oil pipe 10 meet the maximum stroke requirement of the oil cylinder.
The maximum strokes of the main oil cylinder 1 and the auxiliary oil cylinder 4 can be the same or different.
Preferably, as shown in fig. 2, the bidirectional hydraulic lock 9 is provided with 6 ports: p1, P2, P3, P4, P5 and P6, and three pilot-controlled check valves K1, K2 and K3; the inlet and outlet P1, the hydraulic control one-way valve K1 and the inlet and outlet P4 form a group of oil passages, the inlet and outlet P2, the hydraulic control one-way valve K2 and the inlet and outlet P5 form a group of oil passages, and the inlet and outlet P3, the hydraulic control one-way valve K3 and the inlet and outlet P6 form a group of oil passages. An inlet and an outlet P4 of the bidirectional hydraulic lock 9 are communicated with a rodless cavity I1-6 of the main oil cylinder 1 through a through hole I1-7 on the main cylinder barrel 1-1; an inlet and an outlet P5 of the bidirectional hydraulic lock 9 are communicated with a rod cavity I1-5 of the main oil cylinder 1 through an outer oil pipe 8 of the main cylinder and through holes II 1-8 on a main cylinder barrel 1-1; an inlet and an outlet P6 of the bidirectional hydraulic lock 9 are communicated with a rodless cavity II 4-6 of the auxiliary oil cylinder 4 through an auxiliary cylinder outer oil pipe 10 and a through hole III 4-7 on the auxiliary cylinder barrel 4-1. Pilot check valve K2 supplies control oil from inlet/outlet port P1 or P3, and pilot check valves K1 and K3 supply control oil from inlet/outlet port P2.
The utility model discloses a theory of operation is:
1. the extension stroke working principle of the main oil cylinder 1 is as follows: pressure oil enters an inlet and an outlet P1 of the two-way hydraulic lock 9, a hydraulic control one-way valve K2 is opened at the same time, the pressure oil enters a rodless cavity I1-6 of the main oil cylinder 1 through the hydraulic control one-way valve K1 and a through hole I1-7, the main oil cylinder piston 1-3 is pushed to drive the piston rod 6 to move rightwards, the auxiliary oil cylinder 4 moves rightwards at the same speed along with the piston rod 6, oil in a rod cavity I1-5 of the main oil cylinder 1 passes through a through hole II 1-8, an oil pipe 8 outside the main oil cylinder and the hydraulic control one-way valve K2 in the two-way hydraulic lock 9 until the inlet and the outlet P2 flow out, the main oil cylinder piston 1-3 moves rightwards to the limit position, and the piston rod 6 drives the auxiliary oil cylinder 4 to move rightwards by the same displacement, so that the maximum extension stroke of the main oil cylinder 1 is realized.
2. The extension stroke working principle of the auxiliary oil cylinder 4 is as follows: pressure oil enters an inlet and an outlet P3 of the two-way hydraulic lock 9, a hydraulic control one-way valve K2 is opened at the same time, the pressure oil enters a rodless cavity II 4-6 of the auxiliary oil cylinder 4 through a hydraulic control one-way valve K3, an auxiliary cylinder outer oil pipe 10 and a through hole III 4-7 of the auxiliary oil cylinder 4, the auxiliary cylinder barrel 4-1 is pushed to move rightwards, oil in a rod cavity II 4-5 of the auxiliary oil cylinder 4 enters a rod cavity I1-5 of the main oil cylinder 1 through an axial oil hole II 4-4, an inner oil pipe 7 and an axial oil hole I1-4, then flows out from an inlet and an outlet P2 through the through hole II 1-8, the main cylinder outer oil pipe 8 and the hydraulic control one-way valve K2 in the two-way hydraulic lock 9, and the auxiliary cylinder barrel 4-1 moves rightwards to a limit position, so that the maximum extension stroke of the auxiliary oil cylinder 4 is realized.
3. The working principle of the withdrawing stroke of the main oil cylinder 1 and the auxiliary oil cylinder 4 is as follows: pressure oil is fed into an inlet and an outlet P2 of the two-way hydraulic lock 9, a hydraulic control one-way valve K1 and K3 are opened simultaneously, the pressure oil enters a rod cavity I1-5 of the main oil cylinder 1 through the hydraulic control one-way valve K2, an outer oil pipe 8 of the main oil cylinder and a through hole II 1-8, then enters a rod cavity II 4-5 of the auxiliary oil cylinder 4 through an axial oil hole I1-4, an inner oil pipe 7 and an axial oil hole II 4-4, a main oil cylinder piston 1-3 of the main oil cylinder 1 drives a piston rod 6 to move leftwards, oil in a rodless cavity I1-6 of the main oil cylinder 1 flows through the through hole I1-7, the hydraulic control one-way valve K1 of the two-way hydraulic lock 9 and flows out of the inlet and the outlet P1, and after pressure oil enters a rod cavity II 4-5 of the auxiliary oil cylinder 4, the auxiliary cylinder 4-1 moves leftwards, oil in a rodless cavity II 4-6 of the auxiliary cylinder 4-1 passes through the through hole 4-7, The oil pipe 10 outside the auxiliary cylinder, the hydraulic control one-way valve K3 in the two-way hydraulic lock 9 flow out from the inlet and outlet P3, the inlet and outlet P2 is continuously supplied with pressure oil, the main cylinder piston 1-3 in the main cylinder 1 and the auxiliary cylinder barrel 4-1 in the auxiliary cylinder 4 continuously move leftwards until the limit positions, and the whole travel retraction of the main cylinder 1 and the auxiliary cylinder 4 is realized.
4. In the process of extending or retracting strokes of the main oil cylinder 1 and the auxiliary oil cylinder 4, the inner protection pipe 3 and the outer protection pipe 2 move axially relative to each other and always keep a sliding sealing state, and the inner oil pipe 7 and the auxiliary cylinder outer oil pipe 10 are pulled open or retracted along with the movement of the auxiliary cylinder barrel 4-1, so that the sufficient length of the oil pipes in the limit stroke state is ensured.
Claims (8)
1. The multi-stroke oil cylinder device is characterized by comprising a main oil cylinder (1), an outer protecting pipe (2), an inner protecting pipe (3) and an auxiliary oil cylinder (4); the main oil cylinder (1) is assembled into an integral structure by a main cylinder barrel (1-1) and a main cylinder cover (1-2), and the auxiliary oil cylinder (4) is assembled into an integral structure by an auxiliary cylinder barrel (4-1) and an auxiliary cylinder cover (4-2); one end of the main oil cylinder (1) is provided with a connecting piece (5), the other end of the main oil cylinder is fixedly connected with one end of the outer protecting pipe (2), the other end of the outer protecting pipe (2) is connected with the outer edge of the inner protecting pipe (3) in a sliding and sealing manner, one end of the inner protecting pipe (3) extends into the outer protecting pipe (2), the other end of the inner protecting pipe extends out of the outer protecting pipe (2) and is fixedly connected with one end of the auxiliary oil cylinder (4), and the other end of the auxiliary oil cylinder (4) is provided with the connecting piece (5); one end of a piston rod (6) penetrates through the main cylinder cover (1-2) and then extends into the main cylinder barrel (1-1) and is fixedly connected with a main cylinder piston (1-3) in the main cylinder barrel (1-1), and the other end of the piston rod (6) penetrates through the inner protection pipe (3) and the auxiliary cylinder cover (4-2) and then extends into the auxiliary cylinder barrel (4-1) and is fixedly connected with an auxiliary cylinder piston (4-3) in the auxiliary cylinder barrel (4-1); the inner oil pipe (7) is arranged in the inner protective pipe (3), one end of the inner oil pipe is connected with an axial oil hole I (1-4) arranged on the main cylinder cover (1-2), and the other end of the inner oil pipe is connected with an axial oil hole II (4-4) arranged on the auxiliary cylinder cover (4-2); a rod cavity I (1-5) of the main oil cylinder (1) is communicated with a rod cavity II (4-5) of the auxiliary oil cylinder (4) through an inner oil pipe (7); one end of an outer oil pipe (8) of the main cylinder is connected with a bidirectional hydraulic lock (9), the other end of the outer oil pipe of the main cylinder is connected with a through hole II (1-8) which is arranged on the main cylinder barrel (1-1) and is close to the end of the main cylinder cover (1-2), and a rodless cavity I (1-6) in the main cylinder (1) is connected with the bidirectional hydraulic lock (9) through a through hole I (1-7) arranged on the main cylinder barrel (1-1); one end of an auxiliary cylinder outer oil pipe (10) is connected with the bidirectional hydraulic lock (9), and the other end of the auxiliary cylinder outer oil pipe is connected with a through hole III (4-7) which is arranged on the auxiliary cylinder barrel (4-1) and communicated with the rodless cavity II (4-6).
2. The multi-stroke cylinder device according to claim 1, wherein the piston rod (6) is fixed with the master cylinder piston (1-3) by a lock nut (11); the piston rod (6) and the auxiliary cylinder piston (4-3) are fixed through a locking nut (11).
3. The multi-stroke cylinder device according to claim 1, wherein the master cylinder (1), the slave cylinder (4) and the piston rod (6) are coaxial.
4. The multi-stroke cylinder device according to claim 1, wherein the connecting members (5) at both ends of the multi-stroke cylinder device are the same or different, and the connecting members (5) are selected from a single lug plate, a double lug plate or a threaded rod.
5. The multi-stroke cylinder device as claimed in claim 1, wherein the bi-directional hydraulic lock (9) is provided with 6 ports: p1, P2, P3, P4, P5 and P6, and three pilot-controlled check valves K1, K2 and K3; the inlet and outlet P1, the hydraulic control one-way valve K1 and the inlet and outlet P4 form a group of oil passages, the inlet and outlet P2, the hydraulic control one-way valve K2 and the inlet and outlet P5 form a group of oil passages, the inlet and outlet P3, the hydraulic control one-way valve K3 and the inlet and outlet P6 form a group of oil passages, and the inlet and outlet P4 of the bidirectional hydraulic lock (9) is communicated with the rodless cavity I (1-6) of the main oil cylinder (1) through a through hole I (1-7) in the main cylinder (1-1); an inlet and an outlet P5 of the bidirectional hydraulic lock (9) are communicated with a rod cavity I (1-5) of the main oil cylinder (1) through a main cylinder outer oil pipe (8) and a through hole II (1-8) on the main cylinder barrel (1-1); an inlet and an outlet P6 of the bidirectional hydraulic lock (9) are communicated with a rodless cavity II (4-6) of the auxiliary oil cylinder (4) through an auxiliary cylinder outer oil pipe (10) and a through hole III (4-7) on the auxiliary cylinder barrel (4-1).
6. The multi-stroke cylinder device according to claim 1, wherein the inner oil pipe (7) is a flexible high-pressure hose.
7. The multi-stroke cylinder device according to claim 1, wherein part or all of the sub-cylinder outer oil pipe (10) is a flexible high-pressure hose.
8. The multi-stroke cylinder device as claimed in claim 1, wherein the strokes of the master cylinder (1) and the slave cylinder (4) are the same or different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121034550.7U CN214788320U (en) | 2021-05-14 | 2021-05-14 | Multi-stroke oil cylinder device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121034550.7U CN214788320U (en) | 2021-05-14 | 2021-05-14 | Multi-stroke oil cylinder device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214788320U true CN214788320U (en) | 2021-11-19 |
Family
ID=78693958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121034550.7U Expired - Fee Related CN214788320U (en) | 2021-05-14 | 2021-05-14 | Multi-stroke oil cylinder device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214788320U (en) |
-
2021
- 2021-05-14 CN CN202121034550.7U patent/CN214788320U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211119 |
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| CF01 | Termination of patent right due to non-payment of annual fee |