CN112145497A - Sectional type linkage double-rod plunger hydraulic cylinder - Google Patents
Sectional type linkage double-rod plunger hydraulic cylinder Download PDFInfo
- Publication number
- CN112145497A CN112145497A CN202010893984.6A CN202010893984A CN112145497A CN 112145497 A CN112145497 A CN 112145497A CN 202010893984 A CN202010893984 A CN 202010893984A CN 112145497 A CN112145497 A CN 112145497A
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- China
- Prior art keywords
- plunger
- cylinder body
- annular
- hydraulic
- inner cylinder
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Classifications
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- 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
- F15B15/1409—Characterised by the construction of the motor unit of the straight-cylinder type with two or more independently movable working pistons
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- 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
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- 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
- F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
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- 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
Abstract
The invention discloses a sectional linkage double-rod-outlet plunger hydraulic cylinder which comprises an outer cylinder body, an annular first plunger body, an inner cylinder body and a second plunger body, wherein the inner cylinder body is arranged in the outer cylinder body, the second plunger body is arranged in the inner cylinder body, a first oil cavity and a fifth oil cavity are formed between a plunger of the second plunger body and the inner cylinder body, the annular first plunger body is arranged between the outer cylinder body and the inner cylinder body, a second oil cavity is formed between the inner side of the annular first plunger body and the inner cylinder body, a third oil cavity is formed between the outer side of the ring and the outer cylinder body, a fourth oil cavity is formed between the plunger of the annular first plunger body and the outer cylinder body, the second oil cavity is respectively communicated with the first oil cavity and the third oil cavity, and the annular first plunger body and the second plunger body extend out of the outer. The hydraulic cylinder is simple in structure, has longer transmission distance, can simultaneously push heavy objects bidirectionally or unidirectionally, has no eccentric force, can realize linkage control of bidirectional plunger rods, accurately controls the transmission speed ratio of the two plunger rods, and is stable in transmission.
Description
Technical Field
The invention relates to a plunger hydraulic cylinder, in particular to a sectional type linkage double-rod plunger hydraulic cylinder.
Background
The hydraulic cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and performs linear reciprocating motion or swinging motion. The hydraulic actuator is simple in structure and reliable in work, and is widely applied as the most typical hydraulic actuator. The multi-stage hydraulic cylinder is applied to occasions such as machine tools, ships and the like with limited installation space and high stroke requirements due to the characteristics of short installation distance and long stroke. At present, most of the existing multistage hydraulic cylinders can only work in one direction and generally cannot control expansion in a segmented mode. The document CN103343763A mentions a hydraulic cylinder capable of bidirectional single expansion, but it can only realize bidirectional independently controllable single expansion, and it still belongs to a unidirectional working hydraulic cylinder in nature, and cannot meet the requirement of multidirectional hydraulic pressure.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a sectional type linkage double-rod-outlet plunger hydraulic cylinder which has long transmission distance, can provide bidirectional or unidirectional force at the same time, has no eccentric force and realizes linkage control of a bidirectional plunger rod.
The technical scheme is as follows: the invention relates to a sectional type linkage double-rod-outlet plunger hydraulic cylinder which comprises an outer cylinder body, an annular first plunger body, an inner cylinder body and a second plunger body, wherein the inner cylinder body is arranged in the outer cylinder body, the second plunger body is arranged in the inner cylinder body, a first oil cavity and a fifth oil cavity are formed between a plunger of the second plunger body and the inner cylinder body, the annular first plunger body is arranged between the outer cylinder body and the inner cylinder body, a second oil cavity is formed between the inner side of the annular first plunger body and the inner cylinder body, a third oil cavity is formed between the outer side of the ring and the outer cylinder body, a fourth oil cavity is formed between the plunger of the annular first plunger body and the outer cylinder body, the second oil cavity is respectively communicated with the first oil cavity and the third oil cavity, and the annular first plunger body and the second plunger body extend.
The second oil cavity is communicated with the first oil cavity and the third oil cavity through a first hydraulic hole channel and a second hydraulic hole channel respectively, the first hydraulic hole channel is arranged on the inner cylinder body, and the second hydraulic hole channel is arranged at the position, close to the plunger, of the annular first plunger body, so that the second hydraulic hole channel can be guaranteed to be located between the outer cylinder body and the inner cylinder body all the time in the whole process of movement of the annular first plunger body; the outer cylinder body, the annular first plunger piston body, the inner cylinder body and the second plunger piston body are coaxially arranged, so that the phenomenon that eccentric force is generated to cause unbalance of force provided by the hydraulic cylinder and damage of the hydraulic cylinder is caused is avoided; one side of the outer cylinder body, which extends out of the annular first plunger body, is fixedly connected with an annular outer end cover, the inner cylinder body is fixedly connected with an inner end cover, the annular first plunger body is installed between the inner cylinder body and the outer cylinder body through a hole between the annular outer end cover and the inner end cover, one side of the outer cylinder body, which extends out of the second plunger body, is fixedly connected with an end cover, the end cover is fixedly connected with the inner cylinder body, the second plunger body extends out of the inner cylinder body through a center hole of the end cover, the annular first plunger body, the annular outer end cover and the inner end cover are sealed, the second plunger body and the end cover are sealed, and the end cover is provided with a third hydraulic pore channel communicated with a; and a fifth hydraulic pore canal communicated with the third oil cavity is arranged on the outer cylinder body.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages: 1. the structure is simple, and the transmission distance is longer; 2. the weight can be pushed bidirectionally or unidirectionally at the same time without eccentric force; 3. the ratio of the sectional areas of the first oil cavity, the second oil cavity and the third oil cavity is changed through size design, the movement rate ratio of the second plunger body of the annular first plunger body can be controlled, linkage control of the bidirectional plunger rods is achieved, the transmission speed ratio of the two plunger rods is accurately controlled, and transmission is stable.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
As shown in figure 1, the sectional type linkage double-rod-out plunger hydraulic cylinder comprises an outer cylinder body 1, an annular first plunger body 3, an inner cylinder body 7 and a second plunger body 9, wherein the inner cylinder body 7 is arranged in the outer cylinder body 1, the second plunger body 9 is arranged in the inner cylinder body 7, a first oil chamber 6 and a fifth oil chamber 14 are formed between a plunger of the second plunger body 9 and the inner cylinder body 7, the annular first plunger body 3 is arranged between the outer cylinder body 1 and the inner cylinder body 7, a second oil chamber 8 is formed between the ring inner side of the annular first plunger body 3 and the inner cylinder body 7, a third oil chamber 10 is formed between the ring outer side and the outer cylinder body 1, a fourth oil chamber 12 and a second oil chamber 8 are formed between a plunger of the annular first plunger body 3 and the outer cylinder body 1 and are respectively communicated with the first oil chamber 6 and the third oil chamber 10 through a first hydraulic hole 4 and a second hydraulic hole 11, the first hydraulic hole 4 is arranged on the inner cylinder body 7, the second hydraulic hole 11 is arranged at the, the annular first plunger body 3 and the annular second plunger body 9 extend out of the outer cylinder body 1 in opposite directions, the outer cylinder body 1, the annular first plunger body 3, the inner cylinder body 7 and the second plunger body 9 are coaxially installed, one side of the outer cylinder body 1 extending out of the annular first plunger body 3 is fixedly connected with an annular outer end cover 2, the inner cylinder body 7 is fixedly connected with an inner end cover 5, the annular first plunger body 3 is installed between the inner cylinder body 7 and the outer cylinder body 1 through a hole between the annular outer end cover 2 and the inner end cover 5, one side of the outer cylinder body 1 extending out of the second plunger body 9 is fixedly connected with an end cover 13, the end cover 13 is fixedly connected with the inner cylinder body 7, the second plunger body 9 extends out of the inner cylinder body 7 through a center hole of the end cover 13, the annular first plunger body 3 is sealed between the annular outer end cover 2 and the inner end cover 5, the second plunger body 9 is sealed between the end covers 13, a third hydraulic hole 15 communicated with a fifth hydraulic hole 14 and a fourth, the outer cylinder body 1 is provided with a fifth hydraulic duct 17 communicated with the third oil chamber 10, and the second oil chamber 8, the third oil chamber 10, the fourth oil chamber 12 and the fifth oil chamber 14 are all annular.
When the hydraulic cylinder is used, the annular first plunger body 3 and the annular second plunger body 9 are both retracted in the hydraulic cylinder in an initial state, at the moment, the total length of the hydraulic cylinder is shortest, when the annular first plunger body 3 and the annular second plunger body 9 work simultaneously, the fifth hydraulic hole 17 is closed, oil is injected into the fourth oil chamber 12 through the fourth hydraulic hole 16 to push the annular first plunger body 3 to move outwards, oil in the third oil chamber 10 is injected into the second oil chamber 8 through the second hydraulic hole 11 and enters the first oil chamber 6 through the first hydraulic hole 4 to push the second plunger body 9 to move outwards, and oil in the fifth oil chamber 14 flows out through the third hydraulic hole 15; when unloading, oil is injected into the fifth oil chamber 14 through the third hydraulic duct 15, the second plunger body 9 is pushed to move towards the inside of the hydraulic cylinder, the oil in the first oil chamber 6 enters the second oil chamber 8 through the first hydraulic duct 4, and is injected into the third oil chamber 10 through the second hydraulic duct 11, the annular first plunger body 3 is pushed to move towards the inside of the hydraulic cylinder, and the oil in the fourth oil chamber 12 flows out through the hydraulic duct 16. By changing the ratio of the sectional areas of the first oil chamber 6, the second oil chamber 8, and the third oil chamber 10 by the dimensional design, the ratio of the moving rates of the annular first plunger body 3 and the second plunger body 8 can be controlled.
When the second plunger body 9 works alone, the fifth hydraulic hole 17 is opened, the fourth hydraulic hole 16 is closed, the annular first plunger body 3 is static, oil is injected into the third oil chamber 10 from the fifth hydraulic hole 17, is injected into the second oil chamber 8 through the second hydraulic hole 11, enters the first oil chamber 6 through the first hydraulic hole 4, pushes the second plunger body 9 to move outwards, and the oil in the fifth oil chamber 14 flows out through the third hydraulic hole 15. When unloading, oil is injected into the fifth oil chamber 14 through the third hydraulic port 15, the second plunger body 9 is pushed to move towards the inside of the hydraulic cylinder, and the oil in the first oil chamber 6 enters the second oil chamber 8 through the hydraulic port 4, is injected into the third oil chamber 10 through the second hydraulic port 11, and finally flows out through the fifth hydraulic port 17.
When the annular first plunger body 3 works alone, the fifth hydraulic hole 17 is opened, the third hydraulic hole 15 is closed, the second plunger body 9 is static, oil is injected into the fourth oil chamber 12 through the hydraulic hole 16 to push the annular first plunger body 3 to move outwards, and oil in the third oil chamber 8 is injected into the second oil chamber 10 through the second hydraulic hole 11 and finally flows out through the fifth hydraulic hole 17. When unloading, oil is injected into the third oil chamber 10 through the fifth hydraulic duct 17 and into the second oil chamber 8 through the second hydraulic duct 11, the annular first plunger body 3 is pushed to move towards the hydraulic cylinder, and the oil in the fourth oil chamber 12 flows out through the fourth hydraulic duct 16.
Claims (6)
1. The sectional linkage double-rod-out plunger hydraulic cylinder is characterized by comprising an outer cylinder body (1), an annular first plunger body (3), an inner cylinder body (7) and a second plunger body (9), wherein the inner cylinder body (7) is installed in the outer cylinder body (1), the second plunger body (9) is installed in the inner cylinder body (7), a first oil cavity (6) and a fifth oil cavity (14) are formed between a plunger of the second plunger body (9) and the inner cylinder body (7), the annular first plunger body (3) is installed between the outer cylinder body (1) and the inner cylinder body (7), a second oil cavity (8) is formed between the annular inner side of the annular first plunger body (3) and the inner cylinder body (7), a third oil cavity (10) is formed between the annular outer side and the outer cylinder body (1), and a fourth oil cavity (12) is formed between a plunger of the annular first plunger body (3) and the outer cylinder body (1), the second oil chamber (8) is respectively communicated with the first oil chamber (6) and the third oil chamber (10), and the annular first plunger body (3) and the annular second plunger body (9) extend out of the outer cylinder body (1) in opposite directions.
2. The segmented linkage double-extension-rod plunger hydraulic cylinder according to claim 1, wherein the second oil chamber (8) is communicated with the first oil chamber (6) and the third oil chamber (10) respectively through a first hydraulic hole (4) and a second hydraulic hole (11), the first hydraulic hole (4) is arranged on the inner cylinder body (7), and the second hydraulic hole (11) is arranged at the position, close to the plunger, of the annular first plunger body (3).
3. The segmented linkage double out-rod plunger hydraulic cylinder according to claim 1, wherein the outer cylinder body (1), the annular first plunger body (3), the inner cylinder body (7) and the second plunger body (9) are coaxially mounted.
4. The segmented linkage double-outlet-rod plunger hydraulic cylinder according to claim 1, characterized in that one side of the outer cylinder body (1) extending out of the annular first plunger body (3) is fixedly connected with an annular outer end cover (2), the inner cylinder body (7) is fixedly connected with an inner end cover (5), the annular first plunger body (3) is installed between the inner cylinder body (7) and the outer cylinder body (1) through a gap between the annular outer end cover (2) and the inner end cover (5), one side of the outer cylinder body (1) extending out of the second plunger body (9) is fixedly connected with an end cover (13), the end cover (13) is fixedly connected with the inner cylinder body (7), and the second plunger body (9) extends out of the inner cylinder body (7) through a center hole of the end cover (13).
5. The segmented linkage double-out-rod plunger hydraulic cylinder according to claim 4, wherein a third hydraulic port (15) communicating with a fifth oil chamber (14) and a fourth hydraulic port (16) communicating with a fourth oil chamber (12) are provided in the end cover (13).
6. The segmented linkage double-outlet-rod plunger hydraulic cylinder according to claim 1, characterized in that the outer cylinder body (1) is provided with a fifth hydraulic hole (17) communicated with a third oil chamber (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010893984.6A CN112145497A (en) | 2020-08-31 | 2020-08-31 | Sectional type linkage double-rod plunger hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010893984.6A CN112145497A (en) | 2020-08-31 | 2020-08-31 | Sectional type linkage double-rod plunger hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112145497A true CN112145497A (en) | 2020-12-29 |
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ID=73890336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010893984.6A Pending CN112145497A (en) | 2020-08-31 | 2020-08-31 | Sectional type linkage double-rod plunger hydraulic cylinder |
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| Country | Link |
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| CN (1) | CN112145497A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113738737A (en) * | 2021-09-10 | 2021-12-03 | 于化奇 | Oil cylinder |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3827031A1 (en) * | 1988-08-10 | 1990-02-15 | Schenck Ag Carl | Loading cylinder with a hollow piston rod |
| CN104405723A (en) * | 2014-11-27 | 2015-03-11 | 无锡润地农林科技有限公司 | Extensible hydraulic oil cylinder |
| CN205154800U (en) * | 2015-11-28 | 2016-04-13 | 西安科技大学 | Can realize pneumatic cylinder of many actions |
| CN108591165A (en) * | 2018-05-15 | 2018-09-28 | 四川长江液压天成机械有限公司 | A kind of compact dual-rod hydraulic cylinder |
-
2020
- 2020-08-31 CN CN202010893984.6A patent/CN112145497A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3827031A1 (en) * | 1988-08-10 | 1990-02-15 | Schenck Ag Carl | Loading cylinder with a hollow piston rod |
| CN104405723A (en) * | 2014-11-27 | 2015-03-11 | 无锡润地农林科技有限公司 | Extensible hydraulic oil cylinder |
| CN205154800U (en) * | 2015-11-28 | 2016-04-13 | 西安科技大学 | Can realize pneumatic cylinder of many actions |
| CN108591165A (en) * | 2018-05-15 | 2018-09-28 | 四川长江液压天成机械有限公司 | A kind of compact dual-rod hydraulic cylinder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113738737A (en) * | 2021-09-10 | 2021-12-03 | 于化奇 | Oil cylinder |
| CN113738737B (en) * | 2021-09-10 | 2023-11-24 | 浙江弘创液压科技有限公司 | Oil cylinder |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201229 |
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| RJ01 | Rejection of invention patent application after publication |