CN208534891U - A kind of hydraulic cylinder - Google Patents
A kind of hydraulic cylinder Download PDFInfo
- Publication number
- CN208534891U CN208534891U CN201820449770.8U CN201820449770U CN208534891U CN 208534891 U CN208534891 U CN 208534891U CN 201820449770 U CN201820449770 U CN 201820449770U CN 208534891 U CN208534891 U CN 208534891U
- Authority
- CN
- China
- Prior art keywords
- piston
- hydraulic cylinder
- flexible rubber
- rubber ring
- ring
- 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.)
- Expired - Fee Related
Links
- 238000007789 sealing Methods 0.000 claims abstract description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 10
- 229910021529 ammonia Inorganic materials 0.000 claims description 4
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
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- Actuator (AREA)
Abstract
The utility model relates to a kind of hydraulic cylinders, including hydraulic cylinder, piston, push rod, piston is located in hydraulic cylinder, sealing structure is formed with the hydraulic inside wall of cylinder on the outside of piston, push rod one end is fixed on the other end on piston and connects power source, -5 ring annular grooves are provided on the outside of piston only, every circle annular groove and hydraulic inside wall of cylinder contact side are provided with a circle notch, every ring annular groove is embedded in flexible rubber ring, flexible rubber ring is hollow structure, it is greater than the gas of air in hollow structure full of the coefficient of expansion, it is flushed on the outside of flexible rubber ring with piston medial plane under room temperature, temperature, which increases gas expansion, causes flexible rubber ring to squeeze out to increase the air-tightness of piston Yu the hydraulic inside wall of cylinder along notch, this programme can effectively prevent the hydraulic cylinder interior leakage in the course of work to leak.
Description
Technical field
The utility model relates to hydraulic cylinder fields, and in particular to a kind of hydraulic cylinder.
Background technique
There are many prominent advantages for hydraulic system, therefore it is very widely used, such as the plastic processing of general industry
Machinery, press, lathe etc.；Engineering machinery, building machinery, agricultural machinery, automobile in walking machine etc..Hydraulic system
Leakage is divided into internal leakage and external leakage.Internal leakage refers to that leakage process occurs in internal system, leakage, the control on hydraulic cylinder piston both sides
Leakage etc. between valve core and valve body processed.Although internal leakage will not generate the loss of hydraulic oil, due to leaking, both
Fixed control action may be subjected to influence, until causing the system failure.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of hydraulic cylinder, can effectively prevent work
Hydraulic cylinder interior leakage leakage in the process.
The purpose of this utility model is achieved through the following technical solutions:
A kind of hydraulic cylinder, including hydraulic cylinder, piston, push rod, the piston are located in hydraulic cylinder, piston outside and hydraulic cylinder
Inner wall forms sealing structure, and described push rod one end is fixed on the other end on piston and connects power source, sets on the outside of the piston only
It is equipped with 3-5 ring annular groove, every circle annular groove and hydraulic inside wall of cylinder contact side are provided with a circle notch, in every ring annular groove
It is embedded in flexible rubber ring, the flexible rubber ring is hollow structure, it is greater than the gas of air in the hollow structure full of the coefficient of expansion,
Flushed with piston medial plane on the outside of flexible rubber ring under room temperature, temperature increase gas expansion cause flexible rubber ring along notch extrusion from
And increase the air-tightness of piston Yu the hydraulic inside wall of cylinder.
Preferably, the gas is selected as ammonia, and it is by gas that gas volume, which varies with temperature, in known all gas
What the coefficient of volume expansion determined, the coefficient of expansion of ammonia (NH3) is 9.733 in common gas, is the largest, and air is 2.723.Therefore
And select the maximum gas of the coefficient of expansion can be sufficiently large with effective guarantee flexible rubber ring swelling volume in this programme, to enhance gas
Close property prevents from leaking.
Preferably, the opening width of the notch is no more than 1/5th of annular groove perimeter.
Preferably, the gap between adjacent two annular groove is greater than 0.5 centimetre.
Preferably, the sum of whole ring annular groove diameters of described piston the same side are no more than the half of piston thickness,
Its purpose prevents annular groove from destroying the structure that piston originally has, it is made to keep sufficiently large working strength.
The beneficial effects of the utility model are: this programme borrows the principle of generation high temperature during pistons work, in piston
Upper to increase the flexible rubber ring having equipped with the coefficient of expansion compared with atmospheric, high temperature makes cushion rubber expansion to the gas of enhancing and cylinder inner wall
Close property, effectively prevents cylinder internal leakage.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the structural schematic diagram of piston.
Specific embodiment
The technical solution of the utility model, but the protection scope of the utility model are described in further detail with reference to the accompanying drawing
It is not limited to as described below.
As shown in Figure 1, 2, a kind of hydraulic cylinder, including hydraulic cylinder 100, piston 200, push rod 301, the piston 200 are located at
In hydraulic cylinder 100,200 outside of piston forms sealing structure with 100 inner wall of hydraulic cylinder, and described 301 one end of push rod is fixed on piston
The other end connects power source on 200, and 200 outer body of piston is provided with 3-5 ring annular groove 201, as shown in Figure 2 in this reality
It applies to design altogether in example and has 4 ring annular grooves 201, the gap between adjacent two annular groove 201 is greater than 0.5 centimetre, and piston 200 is same
The sum of 201 diameter of whole ring annular grooves of side is no more than the half of 200 thickness of piston, every ring annular groove 201 and hydraulic cylinder
100 inner walls contact side is provided with a circle notch 202, and every ring annular groove 201 is embedded in flexible rubber ring 300, the flexible rubber ring 300
For hollow structure 400, it is preferably ammonia in the present embodiment that the hollow structure 400 is interior, which to be full of gas of the coefficient of expansion greater than air,
Gas, the biggish gas of other coefficients of expansion can also, wherein the opening width of above-mentioned notch 202 is no more than annular groove 201 perimeter
1/5th, the purpose is to prevent the flexible rubber ring 300 under high-speed motion of piston 200 elastic under the disengaging of annular groove 201, room temperature
300 outside of cushion rubber is flushed with 200 medial plane of piston, and temperature, which increases gas expansion, causes flexible rubber ring 300 to squeeze out along notch 202
To increase the air-tightness of piston 200 Yu 100 inner wall of hydraulic cylinder.
The above is only the preferred embodiment of the utility model, it should be understood that the utility model is not limited to herein
Disclosed form, should not be regarded as an exclusion of other examples, and can be used for other combinations, modifications, and environments, and
Can be in contemplated scope described herein, modifications can be made through the above teachings or related fields of technology or knowledge.And this field
The modifications and changes that personnel are carried out do not depart from the spirit and scope of the utility model, then all should be in right appended by the utility model
It is required that protection scope in.
Claims (5)
1. a kind of hydraulic cylinder, including hydraulic cylinder (100), piston (200), push rod (301), the piston (200) are located at hydraulic cylinder
(100) in, sealing structure is formed with hydraulic cylinder (100) inner wall on the outside of piston (200), described push rod (301) one end is fixed on work
It fills in the other end on (200) and connects power source, which is characterized in that piston (200) outer body is provided with 3-5 ring annular groove
(201), every circle annular groove (201) and hydraulic cylinder (100) inner wall contact side are provided with a circle notch (202), every ring shape
Slot (201) is embedded in flexible rubber ring (300), and the flexible rubber ring (300) is hollow structure (400), the hollow structure (400)
It is interior to be full of gas of the coefficient of expansion greater than air, it is flushed on the outside of flexible rubber ring (300) with piston (200) medial plane under room temperature,
Temperature, which increases gas expansion, causes flexible rubber ring (300) to squeeze out to increase piston (200) and hydraulic cylinder along notch (202)
(100) air-tightness of inner wall.
2. hydraulic cylinder according to claim 1, which is characterized in that the gas is selected as ammonia.
3. hydraulic cylinder according to claim 1, which is characterized in that the opening width of the notch (202) is no more than annular
/ 5th of slot (201) perimeter.
4. hydraulic cylinder according to claim 1, which is characterized in that the gap between adjacent two annular groove (201) is greater than 0.5
Centimetre.
5. hydraulic cylinder according to claim 1, which is characterized in that whole ring annular grooves of described piston (200) the same side
(201) the sum of diameter is no more than the half of piston (200) thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820449770.8U CN208534891U (en) | 2018-04-02 | 2018-04-02 | A kind of hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820449770.8U CN208534891U (en) | 2018-04-02 | 2018-04-02 | A kind of hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208534891U true CN208534891U (en) | 2019-02-22 |
Family
ID=65397094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820449770.8U Expired - Fee Related CN208534891U (en) | 2018-04-02 | 2018-04-02 | A kind of hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208534891U (en) |
-
2018
- 2018-04-02 CN CN201820449770.8U patent/CN208534891U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190222 |