CN107687459A - Piston rod - Google Patents
Piston rod Download PDFInfo
- Publication number
- CN107687459A CN107687459A CN201710783008.3A CN201710783008A CN107687459A CN 107687459 A CN107687459 A CN 107687459A CN 201710783008 A CN201710783008 A CN 201710783008A CN 107687459 A CN107687459 A CN 107687459A
- Authority
- CN
- China
- Prior art keywords
- sleeve pipe
- described sleeve
- sealing ring
- pressure
- diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- F15B15/1423—Component parts; Constructional details
- F15B15/1457—Piston rods
- F15B15/1461—Piston rod sealings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/164—Sealings between relatively-moving surfaces the sealing action depending on movements; pressure difference, temperature or presence of leaking fluid
-
- 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
- F15B2215/00—Fluid-actuated devices for displacing a member from one position to another
- F15B2215/30—Constructional details thereof
Abstract
The invention discloses a kind of piston rod, include the body and sealing ring of cylinder, also include a sleeve pipe, the body is multi-diameter shaft, the body includes Part I and Part II, the Part I diameter is more than the Part II, the external diameter of described sleeve pipe is identical with the Part I diameter, described sleeve pipe is connected on the Part II, the sealing ring is arranged on the position between described sleeve pipe and the Part I on the body, the sealing ring includes cross section for the main body of arc and the connecting plate at the main body both ends, the end face of the connecting plate insertion described sleeve pipe and the Part I, passage is provided with the Part I, the passage runs through two end faces of the Part I.
Description
Technical field
The present invention relates to a kind of hydraulic cylinder, more particularly to the piston rod used on hydraulic cylinder.
Background technology
Piston rod in hydraulic cylinder includes the body of cylinder, and described body sidewall sets groove, sealing is set in groove
Circle.Traditional sealing ring is all the rubber ring of a ring shape, and this sealing ring can not be adjusted, under hyperbaric environment and under environment under low pressure
Sealing face pressure be just as.If all sealed according to the requirement of high pressure, the pressure of sealing surface will be very high, corresponding friction
Power can also increase, and efficiency can be caused to reduce under low voltage situations, and if all going to seal according to the pressure ball of low pressure, then it can cause again
Leaked under condition of high voltage.
The content of the invention
For the deficiencies in the prior art, the invention provides a kind of piston rod, can adapt to height pressure ring automatically
Border adjusts the pressure of sealing surface.
The present invention is achieved through the following technical solutions：Piston rod, include the body and sealing ring of cylinder, in addition to
One sleeve pipe, the body are multi-diameter shaft, and the body includes Part I and Part II, and the Part I diameter is more than
The Part II, the external diameter of described sleeve pipe is identical with the Part I diameter, and described sleeve pipe is connected to the Part II
On, the sealing ring is arranged on the position between described sleeve pipe and the Part I on the body, the sealing ring
It is the main body of arc and the connecting plate at the main body both ends including cross section, the connecting plate inserts described sleeve pipe and described first
Partial end face, passage is provided with the Part I, and the passage runs through two end faces of the Part I.Use
When, hydraulic oil by being communicated on the inside of passage and sealing ring, that is, the pressure of sealing ring and the pressure of hydraulic oil it is identical, work as hydraulic pressure
When oil is in low-pressure, the pressure of sealing surface is also low, and the resistance of motion of piston is small, will not also leak, when hydraulic oil is in high pressure
During power, the pressure rise of sealing surface, sealed reliable, it will not leak.
In above-mentioned technical proposal, it is preferred that described sleeve pipe is connected on the Part II by interference fit.
The present invention has the advantages that：In use, hydraulic oil is communicated by passage with sealing ring inner side, that is, it is close
The pressure of seal is identical with the pressure of hydraulic oil, and when hydraulic oil is in low-pressure, the pressure of sealing surface is also low, the motion of piston
Resistance is small, will not also leak, and when hydraulic oil is in high pressure, the pressure rise of sealing surface, sealed reliable, will not leak.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Fig. 2 is Fig. 1 close-up schematic view.
Embodiment
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings：
Referring to Fig. 1-2, piston rod, include cylindrical body 1 and sealing ring 2, in addition to a sleeve pipe 3.
The body is multi-diameter shaft, and the body 1 includes Part I 11 and Part II 12, and the Part I 11 is straight
Footpath is more than the Part II 12, and the external diameter of described sleeve pipe 3 is identical with the diameter of Part I 11, and described sleeve pipe 3 passed through
Mating connection be full of on the Part II 12.
The sealing ring 2 is arranged on the position between described sleeve pipe 3 and the Part I 11 on the body 1,
The sealing ring 2 includes cross section and inserted for the main body 21 of arc and the connecting plate 22 at the main body both ends, the connecting plate 22
The end face of described sleeve pipe 3 and the Part I 11, passage 1a, the passage 1a are provided with the Part I 11 and runs through institute
State two end faces of Part I 11.
In use, hydraulic oil is communicated by passage with sealing ring inner side, that is, the pressure of the pressure of sealing ring and hydraulic oil
Strong identical, when hydraulic oil is in low-pressure, the pressure of sealing surface is also low, and the resistance of motion of piston is small, will not also leak, work as liquid
When force feed is in high pressure, the pressure rise of sealing surface, sealed reliable, it will not leak.
Claims (2)
1. piston rod, include the body and sealing ring of cylinder, it is characterised in that：Also include a sleeve pipe, the body is rank
Terraced axle, the body include Part I and Part II, and the Part I diameter is more than the Part II, described sleeve pipe
External diameter it is identical with the Part I diameter, described sleeve pipe is connected on the Part II, and the sealing ring is arranged on institute
The position between described sleeve pipe and the Part I on body is stated, the sealing ring includes the main body that cross section is arc
With the connecting plate at the main body both ends, the end face of the connecting plate insertion described sleeve pipe and the Part I, described first
Passage is provided with point, the passage runs through two end faces of the Part I.
2. piston rod according to claim 1, it is characterised in that：Described sleeve pipe is connected to described second by interference fit
On part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710783008.3A CN107687459A (en) | 2017-09-03 | 2017-09-03 | Piston rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710783008.3A CN107687459A (en) | 2017-09-03 | 2017-09-03 | Piston rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107687459A true CN107687459A (en) | 2018-02-13 |
Family
ID=61155915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710783008.3A Pending CN107687459A (en) | 2017-09-03 | 2017-09-03 | Piston rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107687459A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131237A (en) * | 2019-06-17 | 2019-08-16 | 宁波东液传动科技有限公司 | A kind of piston of hydraulic motor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5118141A (en) * | 1989-12-07 | 1992-06-02 | Sanko Kogyo Kabushiki Kaisha | Union joint |
| JPH10252892A (en) * | 1997-03-18 | 1998-09-22 | Ishikawa Gasket Kk | Sealing structure of metal plate gasket |
| CN103291911A (en) * | 2013-06-25 | 2013-09-11 | 郑州大学 | Compression type gas pressing nanometer coining self-adaptive pressing piston structure |
| CN203453465U (en) * | 2013-09-11 | 2014-02-26 | 林红泽 | Sealing nut |
| CN205047824U (en) * | 2015-10-09 | 2016-02-24 | 廊坊金润电气有限公司 | Female connection plug screw |
-
2017
- 2017-09-03 CN CN201710783008.3A patent/CN107687459A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5118141A (en) * | 1989-12-07 | 1992-06-02 | Sanko Kogyo Kabushiki Kaisha | Union joint |
| JPH10252892A (en) * | 1997-03-18 | 1998-09-22 | Ishikawa Gasket Kk | Sealing structure of metal plate gasket |
| CN103291911A (en) * | 2013-06-25 | 2013-09-11 | 郑州大学 | Compression type gas pressing nanometer coining self-adaptive pressing piston structure |
| CN203453465U (en) * | 2013-09-11 | 2014-02-26 | 林红泽 | Sealing nut |
| CN205047824U (en) * | 2015-10-09 | 2016-02-24 | 廊坊金润电气有限公司 | Female connection plug screw |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131237A (en) * | 2019-06-17 | 2019-08-16 | 宁波东液传动科技有限公司 | A kind of piston of hydraulic motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180213 |