CN110500337B - Hydraulic cylinder type telescopic oil pipe - Google Patents
Hydraulic cylinder type telescopic oil pipe Download PDFInfo
- Publication number
- CN110500337B CN110500337B CN201910463946.4A CN201910463946A CN110500337B CN 110500337 B CN110500337 B CN 110500337B CN 201910463946 A CN201910463946 A CN 201910463946A CN 110500337 B CN110500337 B CN 110500337B
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- China
- Prior art keywords
- oil
- cylinder
- oil pipe
- end cover
- piston rod
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- 239000003921 oil Substances 0.000 claims description 87
- 239000010727 cylinder oil Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 description 6
- 230000033001 locomotion Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- 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
- F15B15/16—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type
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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 relates to the technical field of hydraulic equipment, in particular to a hydraulic cylinder type telescopic oil pipe, wherein one end of the telescopic oil pipe is fixed, the other end of the telescopic oil pipe is fixedly connected with a moving platform, a fixed end port is connected with an oil source, and a moving end port is connected with an oil utilization part on the moving platform.
Description
Technical Field
The invention relates to the technical field of hydraulic equipment, in particular to a hydraulic cylinder type telescopic oil pipe.
Background
The existing oil pipes for connecting the moving part and the fixed part are mostly flexible pipes, the flexible pipes can be bent to different degrees along with the change of the distance between the moving part and the fixed part in the moving process of the moving part, and enough space is needed to be reserved for the deformation of the flexible pipes in the design and construction processes; meanwhile, the hose is often bent, so that fatigue damage is easy to occur, and the operation of the system is influenced.
Therefore, aiming at the requirements, the telescopic oil pipe with small reserved space volume and long fatigue life is designed, and has great significance and engineering application value for reducing the volume of a hydraulic system, increasing the reliability and improving the stability of the system.
Disclosure of Invention
The invention aims to solve the technical problems that: the invention provides a hydraulic cylinder type telescopic oil pipe, which aims to solve the problems of large occupied space and short fatigue life of the existing moving platform oil supply mode.
The technical scheme adopted for solving the technical problems is as follows: a hydraulic cylinder type telescopic oil pipe comprises a top end cover, a cylinder barrel, a hollow piston rod, an in-cylinder oil pipe, a piston, a bottom end cover and an oil equalizing pipe, wherein the top end cover and the bottom end cover are respectively and fixedly arranged at the front end and the rear end of the cylinder barrel, the bottom end cover is of a cylindrical structure, a blind hole is formed in the inner end surface of the bottom end cover along an axial line, an oil inlet B and a bottom oil hole are formed in the periphery of the bottom end cover, the oil inlet B and the bottom oil hole are communicated with the blind hole, the top oil hole is formed in the periphery of the top end cover, the top oil hole is communicated with the bottom oil hole through the oil equalizing pipe, the in-cylinder oil pipe is located in the cylinder barrel, the bottom of the in-cylinder oil pipe is fixedly connected with the bottom end cover, the bottom of the in-cylinder oil pipe is located at the periphery of the blind hole, the inside of the in-cylinder oil pipe is communicated with the blind hole, the hollow piston rod is sleeved on the in-cylinder oil pipe, the front end cover of the hollow piston rod penetrates out of the top end cover, an oil port A is formed in the front end surface of the hollow piston rod, the rear end of the piston is fixedly connected with the piston rod, an exhaust cavity is arranged between the piston and the bottom end cover, the piston is communicated with the cylinder end cover, the exhaust cavity is communicated with the exhaust cavity is formed in the exhaust cavity, the exhaust cavity is formed in the position close to the top is communicated with the top cavity, the inside the cylinder cavity is communicated with the inside the cylinder piston through the inside the cylinder piston rod.
The area of the outer circle of the cross section of the oil pipe in the cylinder is equal to the annular area clamped by the inner circle of the cylinder barrel and the inner circle of the hollow piston rod.
The length of the oil pipe in the cylinder is equal to the length of the cylinder barrel.
The hydraulic cylinder type telescopic oil pipe has the advantages that one end of the telescopic oil pipe is fixed, the other end of the telescopic oil pipe is fixedly connected with the moving platform, the fixed end port is connected with an oil source, and the moving end port is connected with an oil utilization part on the moving platform.
Drawings
The invention will be further described with reference to the drawings and examples.
Fig. 1 is a schematic structural view of a hydraulic cylinder type telescopic oil pipe of the present invention.
FIG. 2 is a schematic diagram of the bottom end cap of the hydraulic cylinder type telescoping oil pipe of the present invention;
fig. 3 is a schematic view of the piston rod structure.
In the figure: 1. top end cover, 11, top oilhole, 2, cylinder, 21, exhaust hole, 3, hollow piston rod, 31, hydraulic fluid port A,4, in-cylinder oil pipe, 5, piston, 6, bottom end cover, 61, blind hole, 62, oil inlet hole B,63, bottom oilhole, 7, oil equalizing pipeline, 8, exhaust chamber, 9, working chamber B,10, working chamber a.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only the structures which are relevant to the invention.
As shown in figures 1-3, the hydraulic cylinder type telescopic oil pipe comprises a top end cover 1, a cylinder barrel 2, a hollow piston rod 3, an in-cylinder oil pipe 4, a piston 5, a bottom end cover 6 and an oil equalizing pipe 7, wherein the top end cover 1 and the bottom end cover 6 are respectively fixedly arranged at the front end and the rear end of the cylinder barrel 2, the bottom end cover 6 is of a cylindrical structure, a blind hole 61 is formed in the inner end surface of the bottom end cover 6 along the axis, an oil inlet B62 and a bottom oil hole 63 are formed in the periphery of the bottom end cover 6, the oil inlet B62 and the bottom oil hole 63 are communicated with the blind hole 61, a top oil hole 11 is formed in the periphery of the top end cover 1, the top oil hole 11 and the bottom oil hole 63 are communicated through the oil equalizing pipe 7, the in-cylinder oil pipe 4 is arranged in the cylinder barrel 2, the bottom of the in-cylinder oil pipe 4 is fixedly connected with the bottom end cover 6, the hollow piston rod 3 and the piston 5 are sleeved on the periphery of the blind hole 61, the front end cover 1 penetrates through the top end cover 1, the front end cover 3 is fixedly arranged at the front end of the piston rod 3 and the piston rod 5 is communicated with the piston rod 3, the piston rod 9 a is arranged at the position near the piston rod 3 a, and the piston rod 3 is communicated with the piston rod 3 a is arranged at the piston end 9 a is communicated with the piston rod 4, and the piston rod 3 is arranged near the piston end is arranged at the piston end 9, and is communicated with the piston rod 3, and is communicated with the piston rod is inside the piston end is inside the piston cylinder end and is the piston cylinder end is 5. The cylinder barrel 2, the hollow piston rod 3 and the in-cylinder oil pipe 4 are all coaxially arranged.
The area of the outer circle of the cross section of the in-cylinder oil pipe 4 is equal to the annular area clamped by the inner circle of the cylinder barrel 2 and the inner circle of the hollow piston rod 3. The length of the in-cylinder oil pipe 4 is equal to the length of the cylinder tube 2.
Working principle: the oil inlet hole B62 is used for oil feeding, the oil port A31 is used for oil feeding, and meanwhile, the oil in the oil inlet hole B62 enters the working cavity B9 through the top oil hole 11 and the oil equalizing pipeline 7. When the hollow piston rod 3 stretches out, the piston 5 moves forwards, the working cavity B9 is reduced, oil in the working cavity B9 enters the working cavity a10 through the oil equalizing conduit 7, and the effective acting area of the working cavity B9 is equal to the effective acting area of the working cavity a10 (the area of the outer circle of the cross section of the oil pipe 4 in the cylinder is equal to the annular area clamped by the inner circle of the cylinder barrel 2 and the inner circle of the hollow piston rod 3), so that excessive oil supplement of the oil inlet hole B62 is not needed, and the hollow piston rod 3 stretches out to increase the volume of the hollow inside the working cavity a10. When the hollow piston rod 3 is retracted, the oil inlet hole B62 is still used for oil inlet, the oil port A31 is used for oil outlet, at the moment, the volume of the working cavity a10 is reduced, the volume of the working cavity B9 is increased, and the volume increased by the working cavity B9 is supplemented by the volume of oil liquid reduced by the working cavity a10 due to the fact that the effective acting areas of the two working cavities are equal, so that no extra flow is needed.
The oil inlet hole B62 is fixed, the oil port A31 on the front end surface of the hollow piston rod 3 is fixedly connected with the moving platform, the fixed end oil inlet hole B62 is connected with an oil source, the movable end oil port A31 is connected with an oil utilization component on the moving platform, then the hollow piston rod 3 is driven to reciprocate in the reciprocating motion process of the moving platform, the position of an oil pipe joint is fixed relative to the oil utilization component on the platform, the oil supply of the moving platform is realized without a hose, the reserved bending space in the hose motion process can be saved, the system rigidity is increased, and the fatigue and aging problems caused by bending of the hose in the motion process are avoided.
The oil port A31 and the oil inlet hole B62 are respectively connected with the oil paths of the moving platform and the fixed part, and as the middle is a passage, the pressure oil can realize oil liquid transmission through the telescopic oil pipe. The area of the outer circle of the cross section of the in-cylinder oil pipe 4 is equal to the annular area clamped by the inner circle of the cylinder barrel 2 and the inner circle of the hollow piston rod 3, so that the volume change quantity of the working cavity a10 is equal to the volume change quantity of the working cavity b9 in the moving process of the piston 5, and the volume change rates are opposite, namely the total volume of the working cavity 10a and the working cavity b9 is kept unchanged. The movement of the piston 5 does not have any effect on the downstream flow.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (3)
1. The utility model provides a telescopic oil pipe of pneumatic cylinder formula which characterized in that: comprises a top end cover (1), a cylinder barrel (2), a hollow piston rod (3), an in-cylinder oil pipe (4), a piston (5), a bottom end cover (6) and an oil homogenizing pipeline (7),
the top end cover (1) and the bottom end cover (6) are respectively and fixedly arranged at the front end and the rear end of the cylinder barrel (2),
the bottom end cover (6) is of a cylindrical structure, a blind hole (61) is arranged on the inner end surface of the bottom end cover (6) along the axis, an oil inlet hole B (62) and a bottom oil hole (63) are arranged on the periphery of the bottom end cover (6), the oil inlet hole B (62) and the bottom oil hole (63) are communicated with the blind hole (61),
the periphery of the top end cover (1) is provided with a top oil hole (11), the top oil hole (11) is communicated with the bottom oil hole (63) through an oil equalizing pipeline (7),
the in-cylinder oil pipe (4) is positioned in the cylinder barrel (2), the bottom of the in-cylinder oil pipe (4) is fixedly connected with the bottom end cover (6), the bottom of the in-cylinder oil pipe (4) is positioned at the periphery of the blind hole (61), the inside of the in-cylinder oil pipe (4) is communicated with the blind hole (61),
the hollow piston rod (3) and the piston (5) are both sleeved on the oil pipe (4) in the cylinder, the front end of the hollow piston rod (3) penetrates out of the top end cover (1), the front end surface of the hollow piston rod (3) is provided with an oil port A (31), the rear ends of the piston (5) and the hollow piston rod (3) are fixedly connected, an exhaust cavity (8) is arranged between the piston (5) and the bottom end cover (6), an exhaust hole (21) communicated with the exhaust cavity (8) is arranged on the cylinder barrel (2) close to the bottom,
a working cavity b (9) is arranged between the piston (5) and the top end cover (1), the top oil hole (11) is communicated with the working cavity b (9), the inside of the hollow piston rod (3) is communicated with the inside of the in-cylinder oil pipe (4), and a working cavity a (10) is formed inside the hollow piston rod (3), the inside of the in-cylinder oil pipe (4) and the inside of the blind hole (61).
2. The hydraulic cylinder type telescoping oil pipe as claimed in claim 1, wherein: the area of the outer circle of the cross section of the in-cylinder oil pipe (4) is equal to the annular area clamped by the inner circle of the cylinder barrel (2) and the inner circle of the hollow piston rod (3).
3. The hydraulic cylinder type telescoping oil pipe as claimed in claim 1, wherein: the length of the oil pipe (4) in the cylinder is equal to the length of the cylinder barrel (2).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2019103375308 | 2019-04-25 | ||
| CN201910337530 | 2019-04-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110500337A CN110500337A (en) | 2019-11-26 |
| CN110500337B true CN110500337B (en) | 2024-04-16 |
Family
ID=68585718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910463946.4A Active CN110500337B (en) | 2019-04-25 | 2019-05-30 | Hydraulic cylinder type telescopic oil pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110500337B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1526960A (en) * | 2003-09-25 | 2004-09-08 | 浙江大学 | Single rod equal area double acting hydraulic cylinder capable of balancing weight |
| CN200982331Y (en) * | 2006-10-09 | 2007-11-28 | 国营第三八八厂 | Sandwiched cylinder wall two-stage double-function gudgeon oil-intake sea water resistant hydraulic cylinder |
| CN201547054U (en) * | 2009-11-13 | 2010-08-11 | 福建三钢闽光股份有限公司 | Hydraulic cylinder capable of removing oil stains |
| CN102913507A (en) * | 2012-11-16 | 2013-02-06 | 江阴市洪腾机械有限公司 | Hydraulic cylinder with hollow piston rod |
| CN103216484A (en) * | 2013-04-09 | 2013-07-24 | 西安交通大学 | Lower crossbeam inner piston cylinder structure with oil tank arranged on upper crossbeam hydraulic machine |
| CN106438566A (en) * | 2016-11-23 | 2017-02-22 | 韶关市博仕乐液压机械制造有限公司 | Hydrocylinder with built-in circular oil-way |
| JP2017078507A (en) * | 2015-10-19 | 2017-04-27 | 株式会社ユーテック | Single rod type double-acting hydraulic cylinder |
| CN109595217A (en) * | 2019-01-02 | 2019-04-09 | 中船重工中南装备有限责任公司 | The oil cylinder of asphalt channel built in a kind of band |
| CN210509799U (en) * | 2019-04-25 | 2020-05-12 | 江苏恒盈动力科技有限公司 | Hydraulic cylinder type telescopic oil pipe |
-
2019
- 2019-05-30 CN CN201910463946.4A patent/CN110500337B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1526960A (en) * | 2003-09-25 | 2004-09-08 | 浙江大学 | Single rod equal area double acting hydraulic cylinder capable of balancing weight |
| CN200982331Y (en) * | 2006-10-09 | 2007-11-28 | 国营第三八八厂 | Sandwiched cylinder wall two-stage double-function gudgeon oil-intake sea water resistant hydraulic cylinder |
| CN201547054U (en) * | 2009-11-13 | 2010-08-11 | 福建三钢闽光股份有限公司 | Hydraulic cylinder capable of removing oil stains |
| CN102913507A (en) * | 2012-11-16 | 2013-02-06 | 江阴市洪腾机械有限公司 | Hydraulic cylinder with hollow piston rod |
| CN103216484A (en) * | 2013-04-09 | 2013-07-24 | 西安交通大学 | Lower crossbeam inner piston cylinder structure with oil tank arranged on upper crossbeam hydraulic machine |
| JP2017078507A (en) * | 2015-10-19 | 2017-04-27 | 株式会社ユーテック | Single rod type double-acting hydraulic cylinder |
| CN106438566A (en) * | 2016-11-23 | 2017-02-22 | 韶关市博仕乐液压机械制造有限公司 | Hydrocylinder with built-in circular oil-way |
| CN109595217A (en) * | 2019-01-02 | 2019-04-09 | 中船重工中南装备有限责任公司 | The oil cylinder of asphalt channel built in a kind of band |
| CN210509799U (en) * | 2019-04-25 | 2020-05-12 | 江苏恒盈动力科技有限公司 | Hydraulic cylinder type telescopic oil pipe |
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| Publication number | Publication date |
|---|---|
| CN110500337A (en) | 2019-11-26 |
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