CN2318207Y - Hydraulic feed-through jack - Google Patents
Hydraulic feed-through jack Download PDFInfo
- Publication number
- CN2318207Y CN2318207Y CN 97244363 CN97244363U CN2318207Y CN 2318207 Y CN2318207 Y CN 2318207Y CN 97244363 CN97244363 CN 97244363 CN 97244363 U CN97244363 U CN 97244363U CN 2318207 Y CN2318207 Y CN 2318207Y
- Authority
- CN
- China
- Prior art keywords
- piston
- jack
- feed
- sleeve
- inner sheath
- 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 - Lifetime
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Abstract
The utility model discloses a hydraulic feed-through jack. The inner part of the feed-through sleeve of the prior hydraulic feed-through jack is provided with an inner protective sleeve. The flange on an upper part is fixed on the upper part of a piston and the lower part can be contacted with a back pressing plate. The inner protective sleeve covers the feed-through sleeve and the upper part of the piston. Thus the grit and various kinds of iron or steel foreign matter can be prevented from entering the feed-through sleeve and the gap of the piston from the upper part of the piston. The feed-through sleeve and the piston are prevented from being broken by pulling and shoveling in order to guarantee the jack can normally and reliably work and the service life of the jack is also prolonged.
Description
The utility model relates to a kind of hydraulic pressure feedthrough jack, a kind of hydraulic pressure feedthrough jack that has protective device of more specifically saying so.
Existing various hydraulic pressure feedthrough jack is not because of there being protective device, so in engineering is used, gravel and various iron, steel foreign matter easily enter the space of punching cover and piston space from the top of piston, along with the reciprocal relative motion of punching cover with piston is deep in the space, and it is bad that punching cover and piston are pulled shovel, cause punching cover or piston to be damaged, thereby can not effectively guarantee the normal operation of hydraulic pressure feedthrough jack, the service life of also having reduced jack simultaneously.
The purpose of this utility model is to provide a kind of gravel and various iron, steel foreign matter of preventing to enter the hydraulic pressure feedthrough jack in punching cover and the space of piston space from piston top.
The purpose of this utility model realizes in the following way: be provided with inner sheath in the punching cover of existing hydraulic pressure feedthrough jack, the chimb on inner sheath top is fixed on piston top, its underpart can contact with rear fender, and inner sheath can be followed piston motion.
Because the utility model is installed inner sheath in the punching cover of hydraulic pressure feedthrough jack; and the inner sheath chimb that is fixed on piston top all covers piston top; therefore it can prevent that gravel and various iron, steel foreign matter from entering the space of punching cover and piston space from the top of piston; thereby it is bad effectively to protect punching cover and piston not to be pulled shovel; guarantee the ground work of jack energy normal reliable, and prolonged the service life of jack.
Below in conjunction with drawings and Examples the utility model is further described:
Fig. 1-be the structural representation of first embodiment of the utility model.
Fig. 2-be the structural representation of second embodiment of the utility model.
Fig. 3-be the structural representation of the 3rd embodiment of the utility model.
As shown in Figure 1, hydraulic pressure feedthrough jack provided by the utility model is made of piston 1, front pressuring plate 2, preceding plug 3, punching cover 4, oil cylinder 5, rear fender 6, back plug 7, in punching cover 4, be provided with inner sheath 8, the chimb on its top is fixed on piston 1 top, the bottom can contact with rear fender 6, inner sheath 4 covers piston 1 top and punching cover, and follows piston 1 motion.Thereby can prevent that gravel and various iron, steel foreign matter from entering the space of punching cover and piston space from the top of piston, protection punching cover 4 and piston 1 are not pulled damage.
As these inner sheath 4 bottoms of a kind of embodiment of the present utility model also can with rear fender 6 (see figure 2) that is spaced a distance; Also can adopt another kind of embodiment that inner sheath 6 bottoms are passed rear fender 6 and rear fender 6 is all protected (referring to Fig. 3).
Utilize principle of the present utility model, also inner sheath can be arranged in the cylinder sleeve of hydraulic actuating cylinder, can reach equally and prevent that gravel and various iron, steel foreign matter from entering the space of cylinder sleeve and piston space from the top of piston, protection cylinder sleeve and the not impaired purpose of piston.
Claims (3)
1, a kind of hydraulic pressure feedthrough jack that constitutes by piston (1), front pressuring plate (2), preceding plug (3), punching cover (4), oil cylinder (5), rear fender (6), back plug (7), it is characterized in that being provided with in the punching cover (4) inner sheath (8), the chimb on inner sheath (8) top is fixed on piston (1) top, and its underpart can contact with rear fender (6).
2, hydraulic pressure feedthrough jack according to claim 1 is characterized in that the bottom of inner sheath (8) also can be spaced a distance with rear fender (6).
3, hydraulic pressure feedthrough jack according to claim 1 is characterized in that rear fender (6) also can be passed in the bottom of inner sheath (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97244363 CN2318207Y (en) | 1997-11-16 | 1997-11-16 | Hydraulic feed-through jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97244363 CN2318207Y (en) | 1997-11-16 | 1997-11-16 | Hydraulic feed-through jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2318207Y true CN2318207Y (en) | 1999-05-12 |
Family
ID=33953109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97244363 Expired - Lifetime CN2318207Y (en) | 1997-11-16 | 1997-11-16 | Hydraulic feed-through jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2318207Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101230750B (en) * | 2007-01-23 | 2011-02-09 | 上海海塔机械制造有限公司 | Core-passing type self-raising complete-fluid pressure step hoister and method for hoisting construction platform |
| CN103364276A (en) * | 2012-03-31 | 2013-10-23 | 田剑东 | Intelligent synchronous tension detection device of pre-stress under anchor |
-
1997
- 1997-11-16 CN CN 97244363 patent/CN2318207Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101230750B (en) * | 2007-01-23 | 2011-02-09 | 上海海塔机械制造有限公司 | Core-passing type self-raising complete-fluid pressure step hoister and method for hoisting construction platform |
| CN103364276A (en) * | 2012-03-31 | 2013-10-23 | 田剑东 | Intelligent synchronous tension detection device of pre-stress under anchor |
| CN103364276B (en) * | 2012-03-31 | 2015-08-26 | 田剑东 | A kind of anchor lower prestress intelligent synchronization tension test device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |