CN2617751Y - Hydraulic jack - Google Patents
Hydraulic jack Download PDFInfo
- Publication number
- CN2617751Y CN2617751Y CN 03231135 CN03231135U CN2617751Y CN 2617751 Y CN2617751 Y CN 2617751Y CN 03231135 CN03231135 CN 03231135 CN 03231135 U CN03231135 U CN 03231135U CN 2617751 Y CN2617751 Y CN 2617751Y
- Authority
- CN
- China
- Prior art keywords
- oil
- base
- oil cylinder
- thread
- 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
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Abstract
The utility model discloses an oil jack which is characterized in that a base is connected with an oil cylinder via the thread. An inside diameter step is arranged near the bottom of the base thread. The utility model is equipped with the inside diameter step near the bottom of the base thread. Because the oil cylinder loads or unloads during the application, the elasticity of the oil cylinder increases to the restoration. When the oil cylinder thread and the base thread looses, the high pressure seal also can be ensured. When the high pressure oil in the oil cylinder presses the seal, the base step size is matched with the outside diameter of the oil cylinder, so the size gap is small, ensuring that the rubber seal not press in the size gap and the high pressure oil not relieving pressure. Therefore, the safe performance of the oil jack can be ensured and the service life of the products is enhanced.
Description
Technical field:
The utility model relate to the Hydraulic for lifting load instrument technical field, specifically a kind ofly be mainly used in that multiple automobile, trac. are repaired or the oil jack of changing of tire.
Background technology:
The oil cylinder of existing oil jack mostly adopts screw thread to screw connection with being connected of base, add rubber seal (side seal) in the lower end of oil cylinder and base, when using oil jack, because pressurization back oil cylinder internal work oil pressure increases (500-1200kg.cm), oil cylinder produces elasticity and increases, oil cylinder returns to original size again after the release, through repeated use oil cylinder screw thread and the loosening phenomenon of base can take place like this, as reuse and to make in-oil cylinder high pressure oil press to rubber seal by the oil cylinder lower end, high pressure oil presses to rubber seal in oil cylinder and the diameter clearance that base cooperates, being easy to generate rubber seal squeezes bad, the high pressure oil release, the jacking weight descends, and produces dangerous; Or just basic top, the loosening back of oil cylinder do not play regulation jacking weight, and this side seal structure causes quality problems maximum in the oil jack industry easily.
Summary of the invention:
The purpose of this utility model is to provide a kind of improved oil jack, and it can improve safety.
To achieve these goals, the technical solution of the utility model is: oil jack, and it mainly comprises base, and oil cylinder, the pump housing, oil return valve rod and overcoat are housed on base, it is characterized in that: base and oil cylinder are provided with the internal diameter step by being threaded at the place, bottom near whorl of base.
The utility model is by being provided with the internal diameter step at the place, bottom near the base negative thread, in use, because the load or unload of oil jack, along with the elasticity of oil cylinder increases to recovery, when oil cylinder screw thread and whorl of base are loosening, also can guarantee high pressure sealing, when oil cylinder inner high voltage oil pressure during to sealing member, because base step dimension and oil cylinder external diameter fit dimension gap are very little, can guarantee that rubber seal can not be depressed in the size gap, so just can guarantee that high pressure oil can release, thereby guarantee the safety performance of oil jack, the service life of having improved product.
Description of drawings:
Fig. 1 is the structural representation of the utility model one embodiment
Fig. 2 is the oil cylinder among Fig. 1 and the enlarged diagram of base junction
The specific embodiment:
The utility model will be further described below in conjunction with drawings and Examples.
The utility model mainly comprises base 7, oil cylinder 14, the pump housing 9, oil return valve rod 6 and overcoat 3 are housed on base 7, it is different from prior art and is: base 7 and oil cylinder 14 are by being threaded, be provided with internal diameter step 15 at place, bottom near base 7 screw threads, concrete structure about jack is prior art, accompanying drawing is representative a kind of, base 7 all adopts with the pump housing 9, oil cylinder 14 and is threaded, pump core 10 is housed in the pump housing 9, lift 11 is housed on the pump core 10, seal ring 8 is housed at the lower end of pump core; Piston 4, piston rod 13 and stressed screw rod 2 are housed in oil cylinder 14, be provided with seal ring 5 at lower end near piston 4, dress crown cap 1 on the oil cylinder 14, in base 7, also be provided with oil groove 16, power fluid 12 is housed in overcoat 3, overcoat 3 can be connected with oil return valve rod 6 by the oil groove in the base 16, and the monolateral width d of the internal diameter step of whorl of base bottom is the 0.1-5 millimeter in the enforcement.
Claims (2)
1, oil jack, it mainly comprises base, and oil cylinder, the pump housing, oil return valve rod and overcoat are housed on base, it is characterized in that: base and oil cylinder are provided with the internal diameter step by being threaded at the place, bottom near whorl of base.
2, by the described oil jack of claim 1, it is characterized in that: the monolateral width of the internal diameter step of whorl of base bottom is the 0.1-5 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03231135 CN2617751Y (en) | 2003-05-13 | 2003-05-13 | Hydraulic jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03231135 CN2617751Y (en) | 2003-05-13 | 2003-05-13 | Hydraulic jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2617751Y true CN2617751Y (en) | 2004-05-26 |
Family
ID=34247983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03231135 Expired - Fee Related CN2617751Y (en) | 2003-05-13 | 2003-05-13 | Hydraulic jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2617751Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102556569A (en) * | 2012-02-06 | 2012-07-11 | 常熟通润汽车零部件股份有限公司 | Hydraulic vertical conveying device |
| CN104235000A (en) * | 2013-12-13 | 2014-12-24 | 安徽三雕起重机械有限公司 | Hydraulic lifting vehicle oil pump |
-
2003
- 2003-05-13 CN CN 03231135 patent/CN2617751Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102556569A (en) * | 2012-02-06 | 2012-07-11 | 常熟通润汽车零部件股份有限公司 | Hydraulic vertical conveying device |
| CN104235000A (en) * | 2013-12-13 | 2014-12-24 | 安徽三雕起重机械有限公司 | Hydraulic lifting vehicle oil pump |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040526 Termination date: 20110513 |