CN108591165B - Compact type double-rod hydraulic cylinder - Google Patents
Compact type double-rod hydraulic cylinder Download PDFInfo
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- CN108591165B CN108591165B CN201810461192.4A CN201810461192A CN108591165B CN 108591165 B CN108591165 B CN 108591165B CN 201810461192 A CN201810461192 A CN 201810461192A CN 108591165 B CN108591165 B CN 108591165B
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- cylinder
- rod
- oil inlet
- oil return
- oil
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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
- F15B15/1404—Characterised by the construction of the motor unit of the straight-cylinder type in clusters, e.g. multiple cylinders in one block
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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
- F15B15/1428—Cylinders
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The invention discloses a compact double-rod hydraulic cylinder, which relates to the technical field of hydraulic cylinders and solves the problems that the existing double-head hydraulic cylinder with double hydraulic rods is inconvenient to use and install and is not beneficial to use in places with limited space, the compact double-rod hydraulic cylinder comprises an outer cylinder, an inner cylinder is arranged in the outer cylinder, a hollow hydraulic rod is sleeved on the outer wall of the inner cylinder, the right end of the hollow hydraulic rod is connected with an annular piston in contact fit with the outer wall of the inner cylinder and the inner wall of the outer cylinder, the left side and the right side of the annular piston are respectively an outer oil return cavity and an outer oil inlet cavity, a hydraulic rod with a piston is arranged in the inner cylinder, the left side and the right side of the piston are respectively an inner oil inlet cavity and an inner oil return cavity, an oil inlet channel communicated with the inner oil inlet cavity is arranged in the inner cylinder body of the outer cylinder, an oil return, the oil inlet pipe wall is provided with an oil inlet hole communicated with the outer oil inlet cavity, and the oil return pipe wall is provided with an oil return hole communicated with the oil return channel.
Description
Technical Field
The invention relates to the technical field of hydraulic cylinders, in particular to a compact double-rod hydraulic cylinder.
Background
The hydraulic cylinder is an actuating element in a hydraulic transmission system, and is an energy conversion device for converting hydraulic energy into mechanical energy to realize the reciprocating motion of a hydraulic rod. The hydraulic cylinder has three types, namely a piston cylinder, a plunger cylinder and a swing cylinder, wherein the piston cylinder and the plunger cylinder realize reciprocating linear motion and output speed and thrust, and the swing cylinder realizes reciprocating swing and outputs angular speed (rotating speed) and torque. The cylinders may be used in combination of two or more or with other mechanisms to accomplish a particular function, other than individually. The hydraulic cylinder has simple structure and reliable work and is widely applied to a hydraulic system of a machine tool.
In the industrial production now, some fields need the pneumatic cylinder both ends all to have flexible function, have appeared thereupon the double-end pneumatic cylinder, and the double-end pneumatic cylinder divide into single hydraulic stem and double hydraulic stem. The double-end hydraulic cylinder of single hydraulic stem is provided with the piston in hydraulic stem mid point department, can realize the reciprocating motion at both ends, but the both ends of pneumatic cylinder can not work simultaneously. And the double-end hydraulic cylinder of two hydraulic pressure poles adopts two hydraulic pressure poles that set up same axis in a cylinder body, and two hydraulic pressure poles are provided with the piston respectively, and both ends can the simultaneous movement, but the cylinder body length of this kind of double-end hydraulic cylinder need be greater than the length sum of two hydraulic pressure poles, leads to cylinder body length overlength, is unfavorable for using in the limited place in space.
Disclosure of Invention
The invention aims to: the invention provides a compact double-rod hydraulic cylinder, aiming at solving the problems that the cylinder body of the double-head hydraulic cylinder of the existing double-hydraulic rod is too long, the use and the installation are inconvenient, and the use in a place with limited space is not facilitated.
The invention specifically adopts the following technical scheme for realizing the purpose:
the utility model provides a compact double-rod hydraulic cylinder, including the outer jar, be provided with the inner cylinder in the outer jar, the cover is equipped with the cavity hydraulic stem on the inner cylinder outer wall, cavity hydraulic stem left end stretches out the outer jar, cavity hydraulic stem right-hand member is connected with the inner cylinder outer wall, outer jar inner wall contact complex annular piston, the annular piston left and right sides is outer oil return chamber and outer oil feed chamber respectively, be provided with the hydraulic stem of taking the piston in the inner cylinder, the piston left and right sides is interior oil feed chamber and interior oil return chamber respectively, the hydraulic stem right-hand member stretches out the outer jar, be provided with the oil feed passageway of intercommunication inner oil feed chamber in the inner cylinder body, be provided with the oil return passageway of intercommunication outer oil return chamber in the outer jar cylinder body, be provided with the inlet tube of intercommunication oil feed passageway and the oil return pipe of intercommunication inner oil return chamber on the outer jar, the inlet tube.
Furthermore, a pipeline switching mechanism a and a pipeline switching mechanism b are respectively arranged at the oil inlet hole and the oil return hole.
Further, the pipeline switching mechanism a comprises a cylinder a, a rod body of the cylinder a transversely penetrates through the oil inlet pipe and corresponds to the oil inlet hole, the diameter of the rod body of the cylinder a is identical to the inner diameter of the oil inlet pipe, an oil inlet which can be communicated and matched with the oil inlet pipe is formed in the rod body of the cylinder a, and a semi-cylindrical notch a is formed in one side, facing the outer cylinder, of the tail end of the rod body of the cylinder a.
Further, pipeline switching mechanism b includes that the body of rod transversely runs through oil return pipe and the cylinder b that the oil gallery corresponds, and cylinder b body of rod diameter is the same with oil return pipe internal diameter, seted up on the body of rod of cylinder b can with oil return pipe pipeline intercommunication complex oil return opening, the terminal outside one side of cylinder b body of rod towards the outer jar of cylinder is provided with semi-cylindrical breach b.
Furthermore, the hollow hydraulic rod is provided with a vent hole on one end surface positioned outside the outer cylinder.
Furthermore, the inner wall of the left end of the inner cylinder and the inner wall of the right end of the outer cylinder are both provided with a limiting ring plate used for limiting the piston and the annular piston.
The invention has the following beneficial effects:
1. the compact double-rod hydraulic cylinder provided by the invention adopts the matching of the hollow rod and the solid rod, so that the telescopic matching of the two hydraulic cylinders is realized.
2. Pipeline switching mechanism a and pipeline switching mechanism b can realize advancing oil pipe, returning oil pipe's oil feed and the switching of oil return, realize that cavity hydraulic stem and hydraulic stem can be respectively solitary work of stretching out and drawing back, still can stretch out and draw back simultaneously to make the device can satisfy different user demands.
3. When the hollow hydraulic rod stretches out and draws back, air can pass through the cavity between air vent business turn over hollow hydraulic rod inner wall and the outer jar terminal surface, prevents that local vacuum from appearing in the cavity and influencing the normal flexible of hollow hydraulic rod.
4. The limit ring plate can prevent the piston and the annular piston from excessively retracting, so that the normal operation of the device is ensured.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is an enlarged view of a portion of FIG. 1 at B;
FIG. 4 is another operational state diagram of the mechanism shown in FIG. 2;
FIG. 5 is another operational state diagram of the mechanism shown in FIG. 3;
reference numerals: 1-vent hole, 2-inner cylinder, 3-inner oil inlet chamber, 4-piston, 5-oil inlet channel, 6-hydraulic rod, 7-outer cylinder, 8-hollow hydraulic rod, 9-outer oil return chamber, 10-annular piston, 11-outer oil inlet chamber, 12-oil inlet pipe, 13-oil return pipe, 14-limit ring plate, 15-oil return channel, 16-inner oil return chamber, 17-oil inlet hole, 18-pipeline switching mechanism a, 18.1-oil inlet, 18.2-cylinder a, 18.3-gap a, 19-oil return hole, 20-pipeline switching mechanism b, 20.1-oil return hole, 20.2-cylinder b, 20.3-gap b.
Detailed Description
For a better understanding of the present invention by those skilled in the art, the present invention will be described in further detail below with reference to the accompanying drawings and the following examples.
Example 1
A compact double-rod hydraulic cylinder comprises an outer cylinder 7, an inner cylinder 2 is arranged in the outer cylinder 7, a hollow hydraulic rod 8 is sleeved on the outer wall of the inner cylinder 2, the left end of the hollow hydraulic rod 8 extends out of the outer cylinder 7, the right end of the hollow hydraulic rod 8 is connected with an annular piston 10 which is in contact fit with the outer wall of the inner cylinder 2 and the inner wall of the outer cylinder 7, the left side and the right side of the annular piston 10 are respectively an outer oil return cavity 9 and an outer oil inlet cavity 11, a hydraulic rod 6 with a piston 4 is arranged in the inner cylinder 2, the left side and the right side of the piston 4 are respectively an inner oil inlet cavity 3 and an inner oil return cavity 16, the right end of the hydraulic rod 6 extends out of the outer cylinder 7, an oil inlet channel 5 communicated with the inner oil inlet cavity 3 is arranged in the inner cylinder body of the inner cylinder 2, an oil return channel 15 communicated with the outer oil return cavity 9 is arranged in the outer cylinder 7, an oil inlet pipe 12 communicated with, the wall of the oil return pipe 13 is provided with an oil return hole 19 communicated with the oil return channel 15.
The working principle is as follows: when the hydraulic cylinder needs to be extended, hydraulic medium oil is input through the oil inlet pipe 12 and enters the outer oil inlet cavity 11 through the oil inlet hole 17 on the oil inlet pipe 12, so that the annular piston 10 and the hollow hydraulic rod 8 are driven to extend out, meanwhile, the hydraulic medium oil enters the oil inlet channel 5 through the oil inlet pipe 12 and enters the inner oil inlet cavity 3 through the oil inlet channel 5, and the piston 4 and the hydraulic rod 6 are driven to extend out; when the hydraulic cylinder needs to retract, hydraulic medium oil is input through the oil return pipe 13, the hydraulic medium oil enters the oil return channel 15 through the oil return hole 19 in the oil return pipe 13, so that the annular piston 10 and the hollow hydraulic rod 8 are driven to retract, and meanwhile, the hydraulic medium oil enters the inner oil return cavity 16 through the oil inlet pipe 12, so that the piston 4 and the hydraulic rod 6 are driven to retract.
The compact double-rod hydraulic cylinder provided by the invention adopts the matching of the hollow rod and the solid rod, so that the telescopic matching of the two hydraulic cylinders is realized.
Example 2
The embodiment is improved on the basis of embodiment 1:
the oil inlet hole 17 and the oil return hole 19 are respectively provided with a pipeline switching mechanism a18 and a pipeline switching mechanism b20.
The improvement has the advantages that: pipeline switching mechanism a and pipeline switching mechanism b can realize advancing oil pipe, returning oil pipe's oil feed and the switching of oil return, realize that cavity hydraulic stem and hydraulic stem can be respectively solitary work of stretching out and drawing back, still can stretch out and draw back simultaneously to make the device can satisfy different user demands.
Example 3
The embodiment is improved on the basis of the embodiment 2:
the pipeline switching mechanism a18 comprises a cylinder a18.2 with a rod body transversely penetrating through the oil inlet pipe 12 and corresponding to the oil inlet hole 17, the diameter of the rod body of the cylinder a18.2 is the same as the inner diameter of the oil inlet pipe 12, an oil inlet 18.1 which can be communicated and matched with the pipeline of the oil inlet pipe 12 is arranged on the rod body of the cylinder a18.2, and a semi-cylindrical notch a18.3 is arranged at one side of the tail end of the rod body of the cylinder a18.2 facing the outside of the outer cylinder 7.
The working principle is as follows: the working principle is as follows: when the hollow hydraulic rod 8 needs to be extended out, the rod body of the cylinder a18.2 extends out to the gap a and corresponds to the pipeline of the oil inlet pipe 12, at the moment, the pipeline of the oil inlet pipe 12 in front of the oil inlet channel 5 is blocked by the rod body of the cylinder a18.2 on the back of the gap a18.3, the oil inlet hole 17 is opened, and hydraulic medium oil enters the outer oil inlet cavity 11 through the oil inlet hole 17; when the hydraulic rod 6 needs to extend out, the rod body of the air cylinder a18.2 extends out to the oil inlet hole 17 and blocks the oil inlet hole 17, the oil inlet 18.1 is communicated with the oil inlet pipe 12 through a pipeline, and hydraulic medium oil enters the oil inlet channel 5 through the oil inlet pipe 12 and the oil inlet 18.1, so as to enter the inner oil inlet cavity 3; when the hollow hydraulic rod 8 and the hydraulic rod 6 are required to extend out simultaneously, the rod body of the air cylinder a18.2 is contracted and opened, and the oil inlet hole 17 and the oil inlet pipe 12 are opened simultaneously, so that hydraulic medium oil enters the outer oil inlet cavity 11 and the inner oil inlet cavity 3 simultaneously.
Example 4
The embodiment is improved on the basis of the embodiment 2:
the pipeline switching mechanism b20 includes that the body of rod transversely runs through oil return pipe 13 and cylinder b20.2 that oil return hole 19 corresponds, and the body of rod diameter of cylinder b20.2 is the same with oil return pipe 13 internal diameter, is seted up on the body of rod of cylinder b20.2 can with oil return pipe 13 pipeline intercommunication complex oil return opening 20.1, the cylinder b20.2 body of rod end is provided with semi-cylindrical breach b20.3 towards outside one side of jar 7.
The operation principle is the same as that of embodiment 3.
Example 5
The embodiment is improved on the basis of embodiment 1:
the hollow hydraulic rod 8 is provided with a vent hole 1 on one end surface located outside the outer cylinder 7.
The improvement has the advantages that: when the hollow hydraulic rod stretches out and draws back, air can pass through the cavity between air vent business turn over hollow hydraulic rod inner wall and the outer jar terminal surface, prevents that local vacuum from appearing in the cavity and influencing the normal flexible of hollow hydraulic rod.
Example 6
The embodiment is improved on the basis of the above embodiment:
and the inner walls of the left end of the inner cylinder 2 and the right end of the outer cylinder 7 are respectively provided with a limit ring plate 14 for limiting the piston 4 and the annular piston 10.
The improvement has the advantages that: the limit ring plate can prevent the piston and the annular piston from excessively retracting, so that the normal operation of the device is ensured.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.
Claims (4)
1. A compact double-rod hydraulic cylinder comprising an outer cylinder (7), characterized in that: an inner cylinder (2) is arranged in an outer cylinder (7), a hollow hydraulic rod (8) is sleeved on the outer wall of the inner cylinder (2), the left end of the hollow hydraulic rod (8) extends out of the outer cylinder (7), the right end of the hollow hydraulic rod (8) is connected with an annular piston (10) which is in contact fit with the outer wall of the inner cylinder (2) and the inner wall of the outer cylinder (7), an outer oil return cavity (9) and an outer oil inlet cavity (11) are respectively arranged on the left side and the right side of the annular piston (10), a hydraulic rod (6) with a piston (4) is arranged in the inner cylinder (2), an inner oil inlet cavity (3) and an inner oil return cavity (16) are respectively arranged on the left side and the right side of the piston (4), the right end of the hydraulic rod (6) extends out of the outer cylinder (7), an oil inlet channel (5) communicated with the inner oil inlet cavity (3) is arranged in the cylinder body of the inner cylinder (2), an oil return channel (15) communicated with the outer oil return cavity (9) is arranged in The oil return pipe comprises an oil pipe (13), an oil inlet hole (17) communicated with an outer oil inlet cavity (11) is formed in the pipe wall of the oil inlet pipe (12), an oil return hole (19) communicated with an oil return channel (15) is formed in the pipe wall of the oil return pipe (13), a pipeline switching mechanism a (18) and a pipeline switching mechanism b (20) are respectively arranged at the oil inlet hole (17) and the oil return hole (19), the pipeline switching mechanism a (18) comprises a cylinder a (18.2) with a rod body transversely penetrating through the oil inlet pipe (12) and corresponding to the oil inlet hole (17), the diameter of the rod body of the cylinder a (18.2) is identical to the inner diameter of the oil inlet pipe (12), an oil inlet (18.1) capable of being communicated and matched with the pipeline of the oil inlet pipe (12) is formed in the rod body of the cylinder a (18.2), and a semi-cylindrical.
2. The compact dual rod hydraulic cylinder of claim 1, wherein: pipeline switching mechanism b (20) include that the body of rod transversely runs through oil return pipe (13) and cylinder b (20.2) that oil return hole (19) correspond, cylinder b (20.2) body of rod diameter is the same with oil return pipe (13) internal diameter, seted up on the body of rod of cylinder b (20.2) can with oil return pipe (13) pipeline intercommunication complex oil return opening (20.1), cylinder b (20.2) body of rod terminal is provided with semi-cylindrical breach b (20.3) towards outer jar (7) outside one side.
3. The compact dual rod hydraulic cylinder of claim 1, wherein: the hollow hydraulic rod (8) is provided with a vent hole (1) on one end surface positioned outside the outer cylinder (7).
4. The compact dual rod hydraulic cylinder of claim 1, wherein: and the inner wall of the left end of the inner cylinder (2) and the inner wall of the right end of the outer cylinder (7) are respectively provided with a limiting ring plate (14) used for limiting the piston (4) and the annular piston (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810461192.4A CN108591165B (en) | 2018-05-15 | 2018-05-15 | Compact type double-rod hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810461192.4A CN108591165B (en) | 2018-05-15 | 2018-05-15 | Compact type double-rod hydraulic cylinder |
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| Publication Number | Publication Date |
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| CN108591165A CN108591165A (en) | 2018-09-28 |
| CN108591165B true CN108591165B (en) | 2020-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810461192.4A Active CN108591165B (en) | 2018-05-15 | 2018-05-15 | Compact type double-rod hydraulic cylinder |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671386A (en) * | 2019-09-19 | 2020-01-10 | 温州燧人智能科技有限公司 | Bidirectional cylinder |
| CN112145497A (en) * | 2020-08-31 | 2020-12-29 | 江苏科技大学 | Sectional type linkage double-rod plunger hydraulic cylinder |
| CN113738737B (en) * | 2021-09-10 | 2023-11-24 | 浙江弘创液压科技有限公司 | Oil cylinder |
| CN113738738B (en) * | 2021-09-29 | 2023-06-23 | 西安航空学院 | Bidirectional rapid hydraulic cylinder |
| CN113906956B (en) * | 2021-10-08 | 2023-11-24 | 吉林省农业科学院 | Black fungus and Auricularia auricula-judae factorization ware |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1295050B1 (en) * | 1997-09-23 | 1999-04-27 | Luciano Migliori | DOUBLE ACTING TELESCOPIC PNEUMATIC ACTUATOR |
| DE10222914A1 (en) * | 2002-05-24 | 2003-12-04 | Matthias Schum | Actuator cylinder for lifting loads using pneumatic or hydraulic pressure has two concentric cylinders with pistons moving in opposite directions to extend piston rods |
| CN201228689Y (en) * | 2008-07-11 | 2009-04-29 | 包头职业技术学院 | Compound hydraulic cylinder |
| CN101893016A (en) * | 2010-07-20 | 2010-11-24 | 王思聪 | Combined bidirectional long-stroke push-and-pull hydraulic cylinder |
| CN202381448U (en) * | 2011-11-14 | 2012-08-15 | 徐州重型机械有限公司 | Hydraulic oil cylinder and hydraulic system |
| CN202833373U (en) * | 2012-08-16 | 2013-03-27 | 三一重工股份有限公司 | Hydraulic valve, high and low voltage switch oil circuit, material pumping system and concrete pump |
| CN102788061A (en) * | 2012-08-30 | 2012-11-21 | 中国地质科学院勘探技术研究所 | Low-flow fast movable cylinder |
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2018
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