CN2716597Y - Jack piston - Google Patents
Jack piston Download PDFInfo
- Publication number
- CN2716597Y CN2716597Y CN 200420022338 CN200420022338U CN2716597Y CN 2716597 Y CN2716597 Y CN 2716597Y CN 200420022338 CN200420022338 CN 200420022338 CN 200420022338 U CN200420022338 U CN 200420022338U CN 2716597 Y CN2716597 Y CN 2716597Y
- Authority
- CN
- China
- Prior art keywords
- oil inlet
- jack
- piston
- inlet hole
- steel ball
- 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
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- Actuator (AREA)
Abstract
The utility model discloses a jack piston, which comprises a piston head and a piston rod. The bottom of the piston is provided with the two sects of oil inlets which have different bore diameters and can be communicated with each other. Steel balls are arranged inside of the oil inlet of a large bore diameter and positioned on the joint with the oil inlet of a small bore diameter. The outer side of the steel ball is provided with a regulating spring, and a regulating screw is arranged on the other end of the regulating spring and positioned on the outer end opening of the oil inlet of the large bore diameter. The safe device of a jack is composed of the oil inlet, the steel ball, the regulating spring, and the regulating screw. On the ground that the outer side end opening of the oil inlet of the large bore diameter and the regulating screw are positioned inside of the jack after assembly, users can not see and can not adjust the regulating screw by themselves. The utility model avoids and the use condition of over load, ensures the safe use of the jack, and plays the action of protecting the jack device and the safety of the users.
Description
It is piston that technical field the utility model relates to the inner used parts of a kind of jack, specifically a kind of jack piston that plays the safety protection effect.
The safety installations of background technique hydraulic jack is used for when the working load of jack surpasses rated load it being worked, thereby plays the effect of safety protection.The safety installations of existing hydraulic jack all is located at the jack base outside; like this; the user just can regulate voluntarily to safety installations; thereby reach the purpose that overburdening is used; make safety installations capable with illusory; can not play real safety protection effect, and then cause the generation of jack damage or human casualty accident.And in a single day have an accident, because product structure is destroyed, confirmation of responsibility is brought difficulty, and the user tends to shirk its responsibility, cause very big loss to manufacturing enterprise, influence the normal development of industry.
The summary of the invention technical problem to be solved in the utility model is to propose the jack piston that a kind of user can't regulate voluntarily, can guarantee that jack can overburdening use.
For solving the problems of the technologies described above, the utility model jack piston comprises piston head and piston rod, two sections oil inlet holes that offer the aperture difference in the bottom of piston, are interconnected, in the oil inlet hole of large aperture, the junction point of itself and small aperture oil inlet hole is provided with steel ball, the described steel ball outside is provided with Regulation spring, and the outside port of the other end of this spring, described large aperture oil inlet hole is provided with adjusting screw.
Above-mentioned jack piston, described adjusting screw are hollow screw.
Above-mentioned jack piston, described oil inlet hole, steel ball, Regulation spring and adjusting screw are located on the described piston head, corresponding to the corresponding oil guiding hole that offers on described large aperture oil inlet hole, the described piston rod.
Above-mentioned jack piston, described oil inlet hole, steel ball, Regulation spring and adjusting screw are located at the bottom of described piston rod, corresponding to the corresponding oil guiding hole that offers on described small aperture oil inlet hole, the described piston head.
Owing to adopted above-mentioned technical pattern, oil inlet hole, steel ball, Regulation spring and adjusting screw just to constitute the safety installations of the utility model jack.When the assembling jack, after adjusting pressure setting rated load, assembles check table.When very heavy overburdening is used; the pressure of working oil is just greater than setting value in the oil cylinder, and super high pressure oil can be washed steel ball open, and is back to shoe cream room by spring and hollow adjusting screw (or establish oilhole in addition oil is derived); make the jack cisco unity malfunction, thereby reach the effect of safety protection.Because of the outside port and the adjusting screw of assembling large aperture, back filler opening all is positioned at jack inside; the user can't see; thereby also just can't be again adjusting screw voluntarily; avoided the generation of user's overburdening use condition; guarantee the safe handling of jack, really played the effect of protection jack device and user's personal safety.Adjusting screw adopts hollow screw, can realize that working oil is directly derived by screw, and structure is simpler.For the less jack of working load,, thereby safety installations can be located on the piston head because piston rod inside is empty.And,, thereby safety installations should be located at the piston rod bottom because piston rod is a solid body for the bigger jack of working load.
Description of drawings is described in further detail the utility model below in conjunction with drawings and embodiments.
Fig. 1 is the structural representation of the utility model jack piston.
Embodiment as shown in the figure, jack piston comprises piston head 1, piston rod 2 and top cap 9, the two sections oil inlet holes 3,4 that on piston head 1, offer the aperture difference, are interconnected, in large aperture oil inlet hole 4, the junction point of itself and small aperture oil inlet hole 3 is provided with steel ball 5, steel ball 5 outsides are provided with Regulation spring 6.Be provided with hollow adjusting screw 7 at the other end of Regulation spring 6, the outside port of large aperture oil inlet hole 4.The corresponding oil guiding hole 8 that offers on the sidewall corresponding to large aperture oil inlet hole 4, piston rod 2.Adopt the piston of this structure to be applicable to the jack that rated load is less, because its employing is hollow body piston rod 2, the upper end of piston head 1 is inserted in the piston rod 2.And for the bigger jack of rated load, because piston rod 2 is solid bodys, therefore, small aperture oil inlet hole 3, large aperture oil inlet hole 4, steel ball 5, Regulation spring 6 and adjusting screw 7 all will be located at the bottom of piston rod 2, and on corresponding to the piston head 1 of small aperture oil inlet hole 3, need the corresponding oil guiding hole of offering, be communicated with small aperture oil inlet hole 3.
Safety installations in the utility model piston also can be without hollow screw, and adopt common adjusting screw, on piston head or piston rod, offer oil guiding hole in addition and be connected, thereby the working oil will work overloadingly the time imports the working oil shoe cream room from the large aperture oil inlet hole with the large aperture oil inlet hole.
Claims (4)
1, jack piston, comprise piston head and piston rod, it is characterized in that, two sections oil inlet holes that offer the aperture difference in the bottom of described piston, are interconnected, in the oil inlet hole of described large aperture, the junction point of itself and described small aperture oil inlet hole is provided with steel ball, the described steel ball outside is provided with Regulation spring, and the outside port of the other end of this spring, described large aperture oil inlet hole is provided with adjusting screw.
2, jack piston as claimed in claim 1 is characterized in that, described adjusting screw is a hollow screw.
3, jack piston as claimed in claim 1 or 2 is characterized in that, described oil inlet hole, steel ball, Regulation spring and adjusting screw are located on the described piston head, corresponding to the corresponding oil guiding hole that offers on described large aperture oil inlet hole, the described piston rod.
4, jack piston as claimed in claim 1 or 2 is characterized in that, described oil inlet hole, steel ball, Regulation spring and adjusting screw are located at the bottom of described piston rod, corresponding to the corresponding oil guiding hole that offers on described small aperture oil inlet hole, the described piston head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420022338 CN2716597Y (en) | 2004-04-25 | 2004-04-25 | Jack piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420022338 CN2716597Y (en) | 2004-04-25 | 2004-04-25 | Jack piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2716597Y true CN2716597Y (en) | 2005-08-10 |
Family
ID=34870555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420022338 Expired - Fee Related CN2716597Y (en) | 2004-04-25 | 2004-04-25 | Jack piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2716597Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793320A (en) * | 2010-03-08 | 2010-08-04 | 北京中清能发动机技术有限公司 | Piston used for end shaft-movable shaft mechanism, end shaft-movable shaft mechanism and equipment |
-
2004
- 2004-04-25 CN CN 200420022338 patent/CN2716597Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793320A (en) * | 2010-03-08 | 2010-08-04 | 北京中清能发动机技术有限公司 | Piston used for end shaft-movable shaft mechanism, end shaft-movable shaft mechanism and equipment |
| CN101793320B (en) * | 2010-03-08 | 2012-01-11 | 北京中清能发动机技术有限公司 | Piston, end shaft-movable shaft mechanism and internal combustion engine, compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |