CN204140544U - A kind of hydraulic jack - Google Patents
A kind of hydraulic jack Download PDFInfo
- Publication number
- CN204140544U CN204140544U CN201420545713.1U CN201420545713U CN204140544U CN 204140544 U CN204140544 U CN 204140544U CN 201420545713 U CN201420545713 U CN 201420545713U CN 204140544 U CN204140544 U CN 204140544U
- Authority
- CN
- China
- Prior art keywords
- valve
- piston
- oil cylinder
- rod
- seat
- 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
Abstract
A kind of hydraulic jack disclosed in the utility model, comprises cylinder body, piston, piston rod and oil cylinder seat, it is characterized in that: piston region is provided with the upper pressure-limit valve of oil cylinder and the next trimmer valve of oil cylinder, the upper pressure-limit valve of described oil cylinder is by a plunger rod and arrange on piston and the plunger hole running through piston upper and lower end face forms, plunger rod is up and down setting in plunger hole, the next trimmer valve of described oil cylinder comprises valve rod, valve seat and spring, the lower end that valve rod is located at piston is fixedly connected with piston rod, valve seat slides up and down and is located on valve rod, spring bottom valve seat upper-end surface and piston rod between arrange, valve seat is provided with restriction, valve rod is provided with throttling groove, the bottom of described cylinder body is provided with the flow-off corresponding with seating position, flow-off communicates with the bottom filler opening of oil cylinder.Hydraulic jack of the present utility model has upper pressure limiting and the next pooling feature, is suitable for very much simultaneously and needs to rotate the occasion of installing.
Description
Technical field
The utility model relates to a kind of improvement invention of hydraulic jack.
Background technique
Hydraulic jack, as a kind of ram, has that compact structure, thrust are large, the advantage of having stable behavior, and a lot of equipment is widely used.Need hydraulic jack to do the workplace of unidirectional promotion at some, the promotion oil pressure overpressure of the piston rod of the hydraulic jack often oil cylinder cavity of resorption when arriving upper limit position, thus easily cause the generation of unsafe factor; In addition, after the pressure release of oil cylinder cavity of resorption, piston can hurtle down and to impact cylinder block, is not only easy to damage oil cylinder, and has very large noise and send.
Summary of the invention
In view of current known technology Problems existing, the technical problems to be solved in the utility model is to provide one to have upper pressure limiting and the next pooling feature, is suitable for very much simultaneously and needs to rotate the hydraulic jack installing occasion.
For solving the problems of the technologies described above, the utility model takes following technological scheme:
A kind of hydraulic jack, comprises cylinder body, piston, piston rod and oil cylinder seat, it is characterized in that: piston region is provided with the upper pressure-limit valve of oil cylinder and the next trimmer valve of oil cylinder; The upper pressure-limit valve of described oil cylinder is crossed the plunger rod of chute by an Intermediate Gray and to be arranged on piston and the plunger hole running through piston upper and lower end face forms, plunger rod is up and down setting in plunger hole, and plunger rod carries out shutoff by the lower end of plunger rod to plunger hole when upper; The next trimmer valve of described oil cylinder comprises valve rod, valve seat and spring, the lower end that valve rod is located at piston is fixedly connected with piston rod, valve seat slides up and down and is located on valve rod, spring bottom valve seat upper-end surface and piston rod between arrange, valve seat is provided with restriction, valve rod is provided with throttling groove, and the bottom of described cylinder body is provided with the flow-off corresponding with seating position, and flow-off communicates with the bottom filler opening of oil cylinder.
After adopting technique scheme, the utility model can realize upper pressure limiting and the next pooling feature, the working principle of upper pressure-limiting function is: bottom oil cylinder, oil-feed promotes piston moves, now plunger rod can be in upper and carry out shutoff (preventing oil cylinder upper and lower cavity from communicating) by the lower end of plunger rod to plunger hole under the effect of oil pressure, when piston is at close arrival upper limit position, the top of plunger rod can contact with the upper cover of cylinder block and be pressed down, so the upper and lower cavity of oil cylinder can by the launder portion conducting excessively of plunger rod, the pressure of oil cylinder upper and lower cavity (high low pressure chamber) is made to reach balance, play the object of hyperbaric chamber automatic deloading (part), avoid the promotion oil pressure overpressure of oil cylinder cavity of resorption, thus ensure that safety.The next pooling feature working principle be: can hurtle down at oil cylinder cavity of resorption pressure release back piston, at piston close to when arriving bottom cylinder block, first valve seat to be fallen in flow-off and to be stuck in flow-off, the restriction of hydraulic oil from valve seat, the throttling groove overflow of valve rod, the recirculating oil quantity of hydraulic oil significantly reduces, a back pressure is produced to piston, so the seating velocity of piston reduces rapidly, effectively alleviate piston to the impact bottom cylinder block, the system that simultaneously also meets falls requirement slowly to oil cylinder.
Also have, the occasion of installing is rotated for reaching the utility model more applicable needs, have employed following technological scheme: described oil cylinder seat is fixedly connected with the bottom of cylinder body, the both sides of oil cylinder seat arrange axis body overhanging to the left and right, and the outer round surface of axis body lays shallow slot in the shape of a spiral.In technique scheme, helical shallow slot can hold lubricant oil, oil cylinder seat and the cylinder block that is installed on it operationally can be rotated more neatly, also make the promotion of oil cylinder more effective.
Accompanying drawing explanation
The utility model has the following drawings:
Fig. 1 is outline drawing of the present utility model,
Fig. 2 is the A-A view of Fig. 1.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in detail:
As shown in the figure, hydraulic jack of the present utility model, comprises cylinder body 5, piston 4, piston rod 1 and oil cylinder seat 9, and piston region is provided with the upper pressure-limit valve of oil cylinder and the next trimmer valve of oil cylinder; The upper pressure-limit valve of described oil cylinder is crossed the plunger rod 2 of chute 3 by an Intermediate Gray and to be arranged on piston 4 and the plunger hole running through piston upper and lower end face forms, plunger rod 2 is up and down setting in plunger hole, and plunger rod 2 carries out shutoff by the lower end of plunger rod to plunger hole when upper; The next trimmer valve of described oil cylinder comprises valve rod 8, valve seat 7 and spring 6, the lower end that valve rod 8 is located at piston 4 is fixedly connected with piston rod 1, valve seat 7 slides up and down and is located on valve rod 8, spring 6 bottom valve seat 7 upper-end surface and piston rod 1 between arrange, valve seat 7 is provided with restriction 10, valve rod 8 is provided with throttling groove 11, and the bottom of described cylinder body 5 is provided with the flow-off 12 corresponding with valve seat 7 position, and flow-off 12 communicates with the bottom filler opening 13 of oil cylinder; Described oil cylinder seat 9 is fixedly connected with the bottom of cylinder body 5, and the both sides of oil cylinder seat 9 arrange axis body 15 overhanging to the left and right, and the outer round surface of axis body 15 lays shallow slot 14 in the shape of a spiral.
Claims (2)
1. a hydraulic jack, comprises cylinder body, piston, piston rod and oil cylinder seat, it is characterized in that: piston region is provided with the upper pressure-limit valve of oil cylinder and the next trimmer valve of oil cylinder; The upper pressure-limit valve of described oil cylinder is crossed the plunger rod of chute by an Intermediate Gray and to be arranged on piston and the plunger hole running through piston upper and lower end face forms, plunger rod is up and down setting in plunger hole, and plunger rod carries out shutoff by the lower end of plunger rod to plunger hole when upper; The next trimmer valve of described oil cylinder comprises valve rod, valve seat and spring, the lower end that valve rod is located at piston is fixedly connected with piston rod, valve seat slides up and down and is located on valve rod, spring bottom valve seat upper-end surface and piston rod between arrange, valve seat is provided with restriction, valve rod is provided with throttling groove, and the bottom of described cylinder body is provided with the flow-off corresponding with seating position, and flow-off communicates with the bottom filler opening of oil cylinder.
2. a kind of hydraulic jack as claimed in claim 1, is characterized in that: described oil cylinder seat is fixedly connected with the bottom of cylinder body, and the both sides of oil cylinder seat arrange axis body overhanging to the left and right, and the outer round surface of axis body lays shallow slot in the shape of a spiral.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420545713.1U CN204140544U (en) | 2014-09-23 | 2014-09-23 | A kind of hydraulic jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420545713.1U CN204140544U (en) | 2014-09-23 | 2014-09-23 | A kind of hydraulic jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204140544U true CN204140544U (en) | 2015-02-04 |
Family
ID=52417232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420545713.1U Expired - Fee Related CN204140544U (en) | 2014-09-23 | 2014-09-23 | A kind of hydraulic jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204140544U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194884A (en) * | 2016-08-26 | 2016-12-07 | 汽解放柳州特种汽车有限公司 | It is a kind of without internal leakage is pushed up Tipper Lifting oil cylinder |
-
2014
- 2014-09-23 CN CN201420545713.1U patent/CN204140544U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194884A (en) * | 2016-08-26 | 2016-12-07 | 汽解放柳州特种汽车有限公司 | It is a kind of without internal leakage is pushed up Tipper Lifting oil cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150204 Termination date: 20160923 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |