CN215980241U - Novel multisection long stroke lift hydraulic cylinder - Google Patents
Novel multisection long stroke lift hydraulic cylinder Download PDFInfo
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- CN215980241U CN215980241U CN202122560954.6U CN202122560954U CN215980241U CN 215980241 U CN215980241 U CN 215980241U CN 202122560954 U CN202122560954 U CN 202122560954U CN 215980241 U CN215980241 U CN 215980241U
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Abstract
A novel multi-section long-stroke lifting hydraulic oil cylinder relates to the technical field of hydraulic oil cylinders and comprises a plurality of cylinder barrels which are arranged from outside to inside in sequence; a piston rod is arranged in the cylinder barrel at the innermost layer, and the piston rod is provided with an inner cavity; the lower end of the outermost cylinder barrel is connected with an end cover, a first oil port and a second oil port are arranged on the outermost cylinder barrel, the lower ends of other cylinder barrels except the outermost cylinder barrel and the lower end of a piston rod are connected with a piston, the piston divides the cylinder barrel into a rod cavity and a rodless cavity, the first oil port is communicated with the rodless cavity of the outermost cylinder barrel, and the second oil port is communicated with the rod cavity of the outermost cylinder barrel; oil guide pipes are arranged in the other cylinder barrels except the cylinder barrel at the outermost layer, and each oil guide pipe is connected with a corresponding piston; each piston connected with the cylinder barrel is provided with a through hole which is communicated with the rodless cavities of the two adjacent cylinder barrels; each piston is provided with an oil guide pipe channel which is communicated with the rod cavity of the cylinder barrel and the oil guide pipe. The utility model has stable operation.
Description
Technical Field
The utility model relates to the technical field of hydraulic oil cylinders, in particular to a novel multi-section long-stroke lifting hydraulic oil cylinder.
Background
The hydraulic oil cylinder is an actuating element which converts hydraulic energy into mechanical energy and makes linear reciprocating motion or plays a supporting role. Although the shape and the size of the hydraulic system are different on different occasions, the hydraulic system has a simple structure and relatively smooth operation, and is widely applied to various mechanical hydraulic systems.
At present, the multi-section telescopic hydraulic cylinder is widely applied, mainly used for automobile antennas, ship antennas, telescopic arms of hoisting equipment, telescopic devices of fire-fighting equipment, ship carrier equipment and the like, and has wide application range and great effect. However, since the use environments and conditions of various devices are different, the methods used are also different, and at present, there are mainly the following methods: the first method is that the piston rod is extended by hydraulic pressure and then is reset by the weight of the piston rod or the supported body; the second is that the hydraulic pressure pushes the piston to extend the cylinder, the retraction is that the central oil pipe is used to lead the hydraulic oil to the retraction cavity of the hydraulic cylinder, and the hydraulic pressure pushes the piston of the retraction cavity of the cylinder to reset the piston; the third is to use hydraulic pressure to push the piston to move outwards, and when it is withdrawn, it uses external force to discharge the oil in the extended cavity, so that it is in vacuum state, and uses molecular surface tension and atmospheric pressure to make it reset. The product belongs to the second type, and a central oil guide pipe is a multi-section telescopic cylinder. In the prior domestic design of four cylinders with similar sizes, the extension cannot ensure that the cylinder extends from a maximum piston rod to a minimum piston rod in sequence every time, and the cylinder retracts from the minimum piston rod to the maximum piston rod in sequence when retracting; the exhaust of the multi-section cylinder is incomplete, so that the operation is unstable.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide a novel multi-section long-stroke lifting hydraulic oil cylinder which runs stably.
The purpose of the utility model is realized as follows: a novel multi-section long-stroke lifting hydraulic oil cylinder comprises a plurality of cylinder barrels which are sequentially arranged from outside to inside, wherein the cylinder barrels are vertically arranged; a piston rod is arranged in the cylinder barrel at the innermost layer, and the piston rod is provided with an inner cavity; the lower end of the outermost cylinder barrel is connected with an end cover, a first oil port and a second oil port are arranged on the outermost cylinder barrel, the lower ends of other cylinder barrels except the outermost cylinder barrel and the lower end of a piston rod are connected with a piston, the piston divides the cylinder barrel into a rod cavity and a rodless cavity, the first oil port is communicated with the rodless cavity of the outermost cylinder barrel, and the second oil port is communicated with the rod cavity of the outermost cylinder barrel; oil guide pipes are arranged in the other cylinder barrels except the cylinder barrel at the outermost layer, and each oil guide pipe is connected with a corresponding piston; each piston connected with the cylinder barrel is provided with a through hole which is communicated with the rodless cavities of the two adjacent cylinder barrels; each piston is provided with an oil guide pipe channel which is communicated with the rod cavity of the cylinder barrel and the oil guide pipe.
The principle of the utility model is as follows: the pressure oil of the hydraulic power station enters from the first oil port and the second oil port through pipelines. According to the product of the oil pressure of the first oil port and the annular area of the lower end of the piston rod and the product of the oil pressure of the second oil port and the annular area between the piston rod and the outer wall of the oil guide pipe. If the former is larger than the latter, the hydraulic cylinder is pushed to extend from thick to thin in sequence. If the former is smaller than the latter, the piston rod is sequentially contracted. Due to reasonable design of the structure and the pipeline, the stability of the operation of the oil cylinder can be ensured to the maximum extent, and the long-stroke working advantage is achieved.
The upper end of the piston rod is provided with an exhaust valve mounting opening which is communicated with the inner cavity of the piston rod through an exhaust channel. When the air exhaust valve works, the air exhaust valve is connected at the air exhaust valve mounting opening, so that the air exhaust volume ratio of the rod cavity can reach 100% when the air exhaust valve extends out in a vertical working environment. When the telescopic rod is retracted, the exhaust volume ratio of the rodless cavity can reach more than 99.9 percent, and the stable operation of the product can be ensured.
A plurality of oil guide pipes and piston rods are arranged in a matched mode from inside to outside in sequence.
The length of the oil guide pipe is larger than the stroke of the piston.
The piston is a hard copper-welded piston to form a guide supporting structure, and the hard supporting structure can enable the distance between the piston and the guide supporting structure between the piston rods to be farther and the stability to be better. In particular, the lateral deflection of the multi-stage oil cylinder can be reduced and controlled to 1/4 with the general structure. The coaxiality of the center of the top end of the multi-stage oil cylinder is better, and the deviation degree of the center can be controlled to be 1/6 of the original structure.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a view from a-a in fig. 1.
Fig. 3 is a partially enlarged view of fig. 1.
Fig. 4 is a schematic diagram of the first oil port when oil is fed.
Fig. 5 is a schematic diagram of the second oil port when oil is fed.
In the figure, 1 first-stage oil cylinder, 1-1 first-stage cylinder barrel, 1-2 first-stage end cover, 2 second-stage oil cylinder, 2-1 second-stage cylinder barrel, 2-2 second-stage hard welding copper piston, 3 third-stage oil cylinder, 3-1 third-stage cylinder barrel, 3-2 third-stage hard welding copper piston, 4 fourth-stage oil cylinder, 4-1 fourth-stage cylinder barrel, 4-2 fourth-stage hard welding copper piston, 5 piston rod, 6 exhaust valve mounting opening, 7 exhaust passage, 8 first oil opening, 9 second oil opening, 10 second oil guide pipe passage, 11 second through hole, 12 second oil guide pipe, 13 third oil guide pipe, 14 fourth-stage oil guide pipe, 15 third oil guide pipe passage, 16 third through hole, 17 fourth oil guide pipe passage, 18 fourth through hole, 19 fifth oil guide pipe passage and 20 supporting piston.
Detailed Description
As shown in fig. 1 to 5, the novel multi-section long-stroke lifting hydraulic oil cylinder comprises a first-stage oil cylinder 1, a second-stage oil cylinder 2, a third-stage oil cylinder 3, a fourth-stage oil cylinder 4 and a piston rod 5 which are sequentially arranged from outside to inside, wherein the first-stage oil cylinder 1, the second-stage oil cylinder 2, the third-stage oil cylinder 3, the fourth-stage oil cylinder 4 and the piston rod 5 are vertically arranged.
The primary oil cylinder 1 comprises a primary cylinder barrel 1-1 and a primary end cover 1-2, a first oil port 8 and a second oil port 9 are arranged on the primary cylinder barrel 1-1, and the primary end cover 1-2 is connected to the lower end of the primary cylinder barrel 1-1.
The secondary oil cylinder 2 comprises a secondary cylinder barrel 2-1 and a secondary hard copper-welded piston 2-2, the upper end of the secondary cylinder barrel 2-1 extends out of the primary cylinder barrel 1-1, the secondary hard copper-welded piston 2-2 is connected to the lower end of the secondary cylinder barrel 2-1, the secondary hard copper-welded piston 2-2 divides the primary cylinder barrel 1-1 into a rod cavity and a rodless cavity, the rodless cavity of the primary cylinder barrel 1-1 is communicated with the first oil port 8, and the rod cavity is communicated with the second oil port 9. A second-stage oil guide pipe 12 is also arranged in the second-stage cylinder barrel 2-1, and the second-stage oil guide pipe 12 is connected with the second-stage hard copper-welded piston 2-2.
The three-level oil cylinder 3 comprises a three-level cylinder barrel 3-1 and a three-level hard welding copper piston 3-2, the upper end of the three-level cylinder barrel 3-1 extends out of the two-level cylinder barrel 2-1, the three-level hard welding copper piston 3-2 is connected to the lower end of the three-level cylinder barrel 3-1, and the two-level cylinder barrel 2-1 is divided into a rod cavity and a rodless cavity by the three-level hard welding copper piston 3-2. And a third-stage oil guide pipe 13 is also arranged in the third-stage cylinder barrel 3-1, and the third-stage oil guide pipe 13 is connected with the third-stage hard welded copper piston 3-2.
The four-stage oil cylinder 4 comprises a four-stage cylinder 4-1 and a four-stage hard welding copper piston 4-2, the upper end of the four-stage cylinder 4-1 extends out of the three-stage cylinder 3-1, the four-stage hard welding copper piston 4-2 is connected to the lower end of the four-stage cylinder 4-1, and the four-stage hard welding copper piston 4-2 divides the three-stage cylinder 3-1 into a rod cavity and a rodless cavity. A four-level oil guide pipe 14 is also arranged in the four-level cylinder barrel 4-1, and the four-level oil guide pipe 14 is connected with a four-level hard welded copper piston 4-2.
The piston rod 5 is provided with an inner cavity, the lower end of the piston rod 5 is connected with the supporting piston 20, the upper end of the piston rod 5 extends out of the four-stage cylinder barrel 4-1, and the four-stage cylinder barrel 4-1 is divided into a rod cavity and a rodless cavity by the piston rod 5 and the supporting piston 20. An exhaust valve mounting opening 6 is formed in the upper end of the piston rod 5, the exhaust valve mounting opening 6 is used for being connected with an exhaust valve, an exhaust channel 7 is formed in the piston rod 5, and the exhaust channel 7 is communicated with the exhaust valve mounting opening 6 and the inner cavity of the piston rod 5.
A second through hole 11 is formed in the second-stage hard copper-welded piston 2-2, and the second through hole 11 is communicated with a rodless cavity of the first-stage cylinder barrel 1-1 and a rodless cavity of the second-stage cylinder barrel 2-1. A second oil guide pipe passage 10 is also arranged on the second-stage hard welding copper piston 2-2, and the second oil guide pipe passage 10 is communicated with a second-stage oil guide pipe 12 and a rod cavity of the first-stage cylinder barrel 1-1.
And a third through hole 16 is formed in the third-stage hard welding copper piston 3-2, and the third through hole 16 is communicated with a rodless cavity of the second-stage cylinder barrel 2-1 and a rodless cavity of the third-stage cylinder barrel 3-1. And a third oil guide pipe passage 15 is also arranged on the third-stage hard welding copper piston 3-2, and the third oil guide pipe passage 15 is communicated with the third-stage oil guide pipe 13 and a rod cavity of the second-stage cylinder barrel 2-1.
A fourth through hole 18 is formed in the four-stage hard welding copper piston 4-2, and the fourth through hole 18 is communicated with a rodless cavity of the three-stage cylinder barrel 3-1 and a rodless cavity of the four-stage cylinder barrel 4-1. A fourth oil guide pipe channel 17 is also arranged on the four-stage hard welding copper piston 4-2, and the fourth oil guide pipe channel 17 is communicated with the four-stage oil guide pipe 14 and a rod cavity of the three-stage cylinder barrel 3-1.
A fifth oil guide pipe channel 19 is arranged on the supporting piston 20, and the fifth oil guide pipe channel 19 is communicated with the inner cavity of the piston rod 5 and the rod cavity of the four-stage cylinder 4-1.
After the oil cylinder retracts, the second-stage oil guide pipe 12 extends into the third-stage oil guide pipe 13 from the third-stage hard welding copper piston 3-2, the third-stage oil guide pipe 13 extends into the fourth-stage oil guide pipe 14 from the fourth-stage hard welding copper piston 4-2, and the fourth-stage oil guide pipe 14 extends into the inner cavity of the piston rod 5 from the supporting piston 20.
The length of the second-stage oil guide pipe 12 is slightly longer than the stroke of the third-stage hard welding copper piston 3-2, the length of the third-stage oil guide pipe 13 is slightly longer than the stroke of the fourth-stage hard welding copper piston 4-2, and the length of the fourth-stage oil guide pipe 14 is slightly longer than the stroke of the support piston 20.
During operation, pressure oil of the hydraulic power station enters from the first oil port 8 and the second oil port 9 through pipelines. According to the product of the pressure of the oil in the first oil port 8 and the annular area of the lower end of the supporting piston 20 of the piston rod 5 (namely, at C), and the product of the pressure of the oil in the second oil port 9 and the annular area between the piston rod 5 and the outer wall of the four-stage oil guide pipe 14 (namely, at B). If the former is larger than the latter, the hydraulic cylinder is pushed to extend from thick to thin in sequence. If the former is smaller than the latter, the piston rod is sequentially contracted.
Claims (5)
1. The utility model provides a novel multisection long stroke lift hydraulic cylinder, characterized by: the cylinder barrel comprises a plurality of cylinder barrels which are sequentially arranged from outside to inside, and the cylinder barrels are vertically arranged; a piston rod is arranged in the cylinder barrel at the innermost layer, and the piston rod is provided with an inner cavity; the lower end of the outermost cylinder barrel is connected with an end cover, a first oil port and a second oil port are arranged on the outermost cylinder barrel, the lower ends of other cylinder barrels except the outermost cylinder barrel and the lower end of a piston rod are connected with a piston, the piston divides the cylinder barrel into a rod cavity and a rodless cavity, the first oil port is communicated with the rodless cavity of the outermost cylinder barrel, and the second oil port is communicated with the rod cavity of the outermost cylinder barrel; oil guide pipes are arranged in the other cylinder barrels except the cylinder barrel at the outermost layer, and each oil guide pipe is connected with a corresponding piston; each piston connected with the cylinder barrel is provided with a through hole which is communicated with the rodless cavities of the two adjacent cylinder barrels; each piston is provided with an oil guide pipe channel which is communicated with the rod cavity of the cylinder barrel and the oil guide pipe.
2. The novel multi-section long-stroke lifting hydraulic oil cylinder as claimed in claim 1, characterized in that: the upper end of the piston rod is provided with an exhaust valve mounting opening which is communicated with the inner cavity of the piston rod through an exhaust channel.
3. The novel multi-section long-stroke lifting hydraulic oil cylinder as claimed in claim 1, characterized in that: the oil guide pipes and the piston rod are sequentially matched from inside to outside.
4. The novel multi-section long-stroke lifting hydraulic oil cylinder as claimed in claim 3, characterized in that: the length of the oil guide pipe is larger than the stroke of the piston.
5. The novel multi-section long-stroke lifting hydraulic oil cylinder as claimed in claim 1, characterized in that: the piston is a hard welded copper piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122560954.6U CN215980241U (en) | 2021-10-25 | 2021-10-25 | Novel multisection long stroke lift hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122560954.6U CN215980241U (en) | 2021-10-25 | 2021-10-25 | Novel multisection long stroke lift hydraulic cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN215980241U true CN215980241U (en) | 2022-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122560954.6U Active CN215980241U (en) | 2021-10-25 | 2021-10-25 | Novel multisection long stroke lift hydraulic cylinder |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3135762A1 (en) * | 2022-05-18 | 2023-11-24 | Jean Ferras | Double channel telescopic cylinder |
| TWI831373B (en) * | 2022-09-14 | 2024-02-01 | 達見綜合工業股份有限公司 | Multi-section cylinder and flow control method for the same |
| TWI831471B (en) * | 2022-11-15 | 2024-02-01 | 達見綜合工業股份有限公司 | Double-acting multi-section cylinder with extension cushion function |
-
2021
- 2021-10-25 CN CN202122560954.6U patent/CN215980241U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3135762A1 (en) * | 2022-05-18 | 2023-11-24 | Jean Ferras | Double channel telescopic cylinder |
| TWI831373B (en) * | 2022-09-14 | 2024-02-01 | 達見綜合工業股份有限公司 | Multi-section cylinder and flow control method for the same |
| TWI831471B (en) * | 2022-11-15 | 2024-02-01 | 達見綜合工業股份有限公司 | Double-acting multi-section cylinder with extension cushion function |
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