CN207864286U - The oil cylinder of jack - Google Patents
The oil cylinder of jack Download PDFInfo
- Publication number
- CN207864286U CN207864286U CN201721779149.XU CN201721779149U CN207864286U CN 207864286 U CN207864286 U CN 207864286U CN 201721779149 U CN201721779149 U CN 201721779149U CN 207864286 U CN207864286 U CN 207864286U
- Authority
- CN
- China
- Prior art keywords
- oil cylinder
- oil
- unloading trough
- wall
- jack
- 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
- 239000003921 oil Substances 0.000 description 54
- 238000007789 sealing Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
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- Actuator (AREA)
Abstract
The utility model discloses a kind of oil cylinders of jack, solve in existing jack, piston seal mobile serious wear in oil cylinder, cause the problem that service life is low, technical solution to be：A plurality of oil unloading trough is offered on the inner wall of the oil cylinder, the a plurality of oil unloading trough is arranged around the central axis of oil cylinder at even circumferential, and every oil unloading trough is along the axially extending setting of oil cylinder, the upper end wall of oil cylinder is run through in the upper end of oil unloading trough, the lower end wall setting in the arc-shaped of oil unloading trough, and the excessive curved surface of circular arc is formed between the inner wall of oil cylinder, oil unloading trough can reduce the wear intensity that piston seal moves in oil cylinder, improve the service life of oil cylinder and piston seal.
Description
Technical field
The utility model is related to a kind of oil cylinders of jack.
Background technology
Jack cylinder limit hole is all drilling off-load in the prior art, i.e., when the piston rod in oil cylinder 1a is moved to off-load
When hole 3, hydraulic oil can be flowed out from unloading hole, limit the lifting stroke of piston rod, as shown in Figure 4.However by opening up off-load
The mode in hole plays position-limiting action, during use can there is certain defect, i.e., the sealing element on piston rod is slided
When moving by unloading hole, the edge at unloading hole aperture causes serious abrasion to the sealing element on piston rod, leads to sealing element
The case where leakage；On the other hand, the structural strength of oil cylinder entirety can be reduced by opening up unloading hole also, therefore there is improved skies
Between.
Utility model content
In view of the deficiencies of the prior art, the utility model provides a kind of oil cylinder of jack, can reduce piston seal
The wear intensity that part moves in oil cylinder improves the service life of oil cylinder and piston seal.
To achieve the above object, the utility model provides following technical solution：
A kind of oil cylinder of jack, offers a plurality of oil unloading trough on the inner wall of the oil cylinder, a plurality of oil unloading trough around
The central axis of oil cylinder is arranged at even circumferential, and every oil unloading trough is along the axially extending setting of oil cylinder, the upper end of oil unloading trough
Through the upper end wall of oil cylinder, the lower end wall setting in the arc-shaped of oil unloading trough, and form circular arc between the inner wall of oil cylinder and cross and write music
Face.
Preferably, between the two side of the oil unloading trough and oil cylinder inner wall being connected side it is stupefied for fillet be arranged.
Preferably, the bottom wall of the oil unloading trough is arc-shaped setting.
Compared with prior art, it is the advantages of the utility model：Due to the extending direction and piston seal of oil unloading trough
It is excessive by the excessive curved surface of circular arc between extending direction is identical and the lower end wall and the inner wall of oil cylinder of oil unloading trough, therefore when living
When plug sealing element slides past oil unloading trough, it not will produce friction between oil unloading trough, scrape damage, to improve piston rod seal component
And the service life of oil cylinder；On the other hand, replace unloading hole with oil unloading trough, the overall construction intensity of oil cylinder is enabled to obtain
It is obviously improved, the further normal service life for improving oil cylinder.
Description of the drawings
The sectional view of the oil cylinder for the jack that Fig. 1 is provided by the present embodiment；
Fig. 2 is the portions A enlarged drawing in Fig. 1；
The sectional view for the oil unloading trough that Fig. 3 is provided by the present embodiment；
Fig. 4 is the sectional view of oil cylinder in the prior art.
Specific implementation mode
The oil cylinder of the utility model jack is further described by Fig. 1 to Fig. 3.
A kind of oil cylinder of jack offers a plurality of oil unloading trough 2, a plurality of oil unloading trough 2 on the inner wall of the oil cylinder 1
Central axis around oil cylinder 1 is arranged at even circumferential, and every oil unloading trough 2 is along the axially extending setting of oil cylinder 1, oil unloading trough 2
Upper end run through oil cylinder 1 upper end wall, the lower end wall setting in the arc-shaped of oil unloading trough 2, and between the inner wall of oil cylinder 1 formed circle
The excessive curved surface 21 of arc, the excessive 21 significant friction reduced between piston rod seal component of curved surface of the circular arc, to reduce
Abrasion between the two improves the normal service life of oil cylinder 1 and piston seal.
Further, between the two side of the oil unloading trough 2 and 1 inner wall 11 of oil cylinder being connected side it is stupefied for fillet 22 be arranged,
When piston rod rotates relative to oil cylinder 1, which can avoid piston rod seal component and 2 notch edge of oil unloading trough
Between scraping, to further improve the normal service life of oil cylinder 1 and piston rod seal component.
Further, the bottom wall of the oil unloading trough 2 is arc-shaped setting, and the bottom wall of oil unloading trough 2 is arc-shaped setting, can
The generation for avoiding dead angle between bottom wall and side wall, to facilitate the cleaning of oil unloading trough 2.
The above is only the preferred embodiment of the utility model, and the scope of protection of the utility model is not limited merely to
Above-described embodiment, technical solution belonging to the idea of the present invention belong to the scope of protection of the utility model.It should refer to
Go out, for those skilled in the art, it is without departing from the principle of the utility model it is several improvement and
Retouching, these improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (3)
1. a kind of oil cylinder of jack, it is characterized in that：A plurality of oil unloading trough is offered on the inner wall of the oil cylinder, a plurality of described unloads
Oil groove is arranged around the central axis of oil cylinder at even circumferential, and every oil unloading trough is along the axially extending setting of oil cylinder, oil unloading trough
Upper end run through the upper end wall of oil cylinder, the lower end wall setting in the arc-shaped of oil unloading trough, and circular arc is formed between the inner wall of oil cylinder
Excessive curved surface.
2. the oil cylinder of jack according to claim 1, it is characterized in that：The two side of the oil unloading trough and oil cylinder inner wall it
Between linking side it is stupefied for fillet be arranged.
3. the oil cylinder of jack according to claim 1, it is characterized in that：The bottom wall of the oil unloading trough is arc-shaped setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721779149.XU CN207864286U (en) | 2017-12-19 | 2017-12-19 | The oil cylinder of jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721779149.XU CN207864286U (en) | 2017-12-19 | 2017-12-19 | The oil cylinder of jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207864286U true CN207864286U (en) | 2018-09-14 |
Family
ID=63465270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721779149.XU Expired - Fee Related CN207864286U (en) | 2017-12-19 | 2017-12-19 | The oil cylinder of jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207864286U (en) |
-
2017
- 2017-12-19 CN CN201721779149.XU patent/CN207864286U/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 |
Granted publication date: 20180914 |