CN201651282U - Hydraulic piston - Google Patents
Hydraulic piston Download PDFInfo
- Publication number
- CN201651282U CN201651282U CN2010201705219U CN201020170521U CN201651282U CN 201651282 U CN201651282 U CN 201651282U CN 2010201705219 U CN2010201705219 U CN 2010201705219U CN 201020170521 U CN201020170521 U CN 201020170521U CN 201651282 U CN201651282 U CN 201651282U
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- CN
- China
- Prior art keywords
- piston
- groove
- piston rod
- rod
- piston body
- 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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- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model discloses a piton, which comprises a piston body. Internal threads are arranged on the inner surface of the piston body, a piston rod is arranged on the internal threads in a screwed manner, and a groove extending peripherally is arranged on the end wall of the piston body. As the groove arranged on the end wall of the piston body leads stress to be transferred to the groove, the hydraulic piston effectively avoids threaded seizure of the joint of the piston rod and the internal threads of the piston body.
Description
Technical field
The utility model relates to a kind of hydraulic piston.
Background technique
Piston is widely used on the various dynamic power machines, as steamer, diesel engine, petrol engine, compressor, hydraulic press etc., a kind of hydraulic piston is arranged at present, its structure is such, and it comprises piston only, and the internal surface of described piston only is provided with internal thread, this internal thread is twisted and is provided with piston rod, the outer surface of described piston only is located in inner surface of cylinder block, and concrete structure is seen Fig. 1, this hydraulic piston, the screw thread rigid constraint, axially contact stress is big, causes that frictional force is big, and interlock easily takes place.And the rigid constraint place easily produces fatigue crack, even fracture.Also promptly the junction of the piston rod of this hydraulic piston and piston only internal thread can produce stress and concentrates, and causes the outside thread and piston only internal thread mutual " killing " of piston rod.
The model utility content
The purpose of this utility model provides a kind of hydraulic piston, and the junction of the piston rod of this hydraulic piston and piston only internal thread is difficult for producing stress concentrates, and also is that the outside thread and the piston only internal thread of piston rod can " do not killed " mutually.
In order to solve the problems of the technologies described above, the utility model is solved by following technical proposals:
A kind of piston comprises piston only, and the internal surface of described piston only is provided with internal thread, and this internal thread is twisted and is provided with piston rod, and the end wall of described piston only is provided with the groove along extending circumferentially.
In the technique scheme, the longitudinal section of described groove becomes " V " shape, and is somebody's turn to do " V " shape opening along piston rod body of rod direction.
The utility model compared with prior art has following beneficial effect:
The utility model makes stress concentrate and is transferred to this groove because the piston only end wall is provided with groove, avoided the junction of stopper rod outside thread and piston only internal thread " to kill " effectively.
Description of drawings
Fig. 1 is the piston structure schematic representation of prior art.
Fig. 2 is a structural representation of the present utility model.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
Referring to Fig. 2, a kind of piston, the internal surface of described piston only 3 is provided with internal thread, this internal thread is twisted and is provided with piston rod 1, during use, the outer surface of piston only 3 is located in the internal surface of cylinder body, and the end wall of described piston only 3 is provided with the groove 30 along extending circumferentially.
The vertical sectional shape of these grooves 30 can semicircle, V-arrangement, U-shaped or other shapes of being convenient to process.The utility model is arranged to " V " shape that the end is an arc with the longitudinal section of groove 30, and is somebody's turn to do " V " shape opening along piston rod 1 body of rod direction.
Stress is concentrated and to be meant the phenomenon that increase the stress part in the object, generally appears at body form place jumpy, as breach, hole, groove and the rigid constraint part is arranged.Conventional hydraulic piston, the screw thread rigid constraint, axially contact stress is big, causes that frictional force is big, and interlock easily takes place.And the rigid constraint place easily produces fatigue crack, even fracture, specifically referring to Fig. 1, when not offering groove, stress concentrates on the junction of piston only 3 and piston rod 1, specifically sees arrow 100, thereby makes the junction screw thread of piston rod 1 outside thread and piston only 3 internal threads " kill "." killing " described in the utility model is meant that the junction of piston rod 1 outside thread and piston only 3 internal threads is stuck mutually, can not rotate mutually.
Join Fig. 2 once more, when offering groove 30, stress is concentrated by original threaded engagement place shifted,, avoided the junction of piston rod 1 outside thread and piston only 3 internal threads " to kill " effectively even stress concentrates on the position shown in arrow 200 to " V " type groove 30.
Claims (2)
1. a piston comprises piston only (3), and the internal surface of described piston only (3) is provided with internal thread, and this internal thread is twisted and is provided with piston rod (1), it is characterized in that the end wall of described piston only (3) is provided with the groove (30) along extending circumferentially.
2. piston as claimed in claim 1 is characterized in that, the longitudinal section of described groove (30) becomes " V " shape, and is somebody's turn to do " V " shape opening along piston rod (1) body of rod direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201705219U CN201651282U (en) | 2010-04-26 | 2010-04-26 | Hydraulic piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201705219U CN201651282U (en) | 2010-04-26 | 2010-04-26 | Hydraulic piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201651282U true CN201651282U (en) | 2010-11-24 |
Family
ID=43116517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201705219U Expired - Fee Related CN201651282U (en) | 2010-04-26 | 2010-04-26 | Hydraulic piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201651282U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470474A (en) * | 2013-08-31 | 2013-12-25 | 蚌埠高科能源装备有限公司 | Novel small-diameter piston component structure |
-
2010
- 2010-04-26 CN CN2010201705219U patent/CN201651282U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470474A (en) * | 2013-08-31 | 2013-12-25 | 蚌埠高科能源装备有限公司 | Novel small-diameter piston component structure |
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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: 20101124 Termination date: 20140426 |