CN201137530Y - Abrasion-proof piston - Google Patents
Abrasion-proof piston Download PDFInfo
- Publication number
- CN201137530Y CN201137530Y CNU2008201040078U CN200820104007U CN201137530Y CN 201137530 Y CN201137530 Y CN 201137530Y CN U2008201040078 U CNU2008201040078 U CN U2008201040078U CN 200820104007 U CN200820104007 U CN 200820104007U CN 201137530 Y CN201137530 Y CN 201137530Y
- Authority
- CN
- China
- Prior art keywords
- piston
- hole
- piston skirt
- annular groove
- wear
- 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 relates to an abrasion resistant piston, comprising a gas annular slot and an oil slot at the upper of the piston, wherein the piston skirt at the lower is provided with a piston pin base hole, the piston skirt has a flat bottom and at least one annular slot with through holes on the lower part, the annular slot is sheathed by an elastic guiding hoop whose outer diameter is larger than the outer diameter of the piston skirt. The utility model has small friction surface with the inner wall of the cylinder and has enough lubricant for the whole friction surface, thereby reducing the abrasion on the piston, improving tensile resistance and prolonging service life.
Description
Technical field
The utility model relates to the component of internal-combustion engine, specifically is the Wear-resitsting pistons that a kind of internal-combustion engine is used.
Background technique
Piston is one of crucial fragile part that directly influences engine performance and working life.The structure of conventional piston is that top is provided with two road piston gas ring grooves with oil ring groove, is provided with oilhole in the oil ring groove, and piston skirt is provided with the piston pin boss hole, and the periphery in hole is provided with the oil return groove, and the bottom of piston skirt is provided with the navigation wing of two symmetry projectioies.Crank by bent axle during engine operation gets rid of machine oil to piston inner wall, machine oil flows on the piston skirt through oil outlet, past dirty along piston skirt then, form lubricant film with the protection piston, but because the gap of the guiding junction of this piston and cylinder liner is too small, both junctions can not get enough oil lubrication, almost are in the dry grinding phenomenon, and pull-cylinder phenomena will appear in the skirt section of piston easily; And the surface of contact of piston skirt and cylinder inner wall is bigger, and the friction of generation is also very big, causes power to descend, and oil consumption increases, and shorten the working life of motor.
The model utility content
Technical problem to be solved in the utility model provides a kind of Wear-resitsting pistons of simple in structure, long service life.
The utility model solves the problems of the technologies described above with following technological scheme: compression and oil groove are arranged at Wear-resitsting pistons of the present utility model top, the piston pin boss hole is arranged on the piston skirt of bottom, the base of piston skirt is flat limit, the bottom of piston skirt has the annular groove that has through hole together at least, be with the elastic guide snap ring on the annular groove, the external diameter of elastic guide snap ring is bigger than the external diameter of piston skirt.
The shape of through holes of described annular groove is a manhole.
The shape of through holes of described annular groove is a square through hole.
The shape of through holes of described annular groove is the trapezoidal hole for sleeping in of two symmetry combinations.
The utility model is owing to only utilize the elastic guide snap ring to contact with cylinder inner wall, and attrition surface is little, and can produce the whole attrition surface of enough oil lubrication again, makes that wearing for piston is little, tension cylinder ability strong, the prolongation in working life.
Description of drawings
Fig. 1 is the structural representation of the utility model Wear-resitsting pistons.
Fig. 2 is the structural representation after Fig. 1 takes off the elastic guide snap ring.
Fig. 3 is another embodiment's of the utility model Wear-resitsting pistons a structural representation.The through hole of annular groove is the trapezoidal hole for sleeping in of two symmetry combinations among the figure.
Embodiment
As depicted in figs. 1 and 2, there are two road compressions 1 on the top of the utility model Wear-resitsting pistons with oil groove 2, on the piston skirt 3 of its underpart piston pin boss hole 4 is arranged, the base of piston skirt 4 is flat limit, the bottom of piston skirt 3 has the annular groove 6 that has manhole 7 together at least, be with elastic guide snap ring 5 on the annular groove 6, the external diameter of elastic guide snap ring 5 is bigger than the external diameter of piston skirt 4.
The through hole 7 of described annular groove 6 can be square through hole, also can be the trapezoidal hole for sleeping in of two symmetry combinations, as shown in Figure 3.
Described elastic guide snap ring 5 is made by the stainless steel material of chromium plating.
During the work of the utility model Wear-resitsting pistons; only there is elastic guide snap ring to contact with cylinder inner wall as navigation; because surface of contact is little; the friction that produces is very little; the machine oil of piston inner wall can flow out the whole friction surface of sufficient lubrication from through hole simultaneously; and snap ring has better elastic, reduces piston at work to the knocking of cylinder wall, and sliding property is good; therefore can improve the power of motor; fuel saving, high working efficiency can be protected whole piston again effectively; prolong the working life of piston; even the elastic guide snap ring is damaged, also be easy to change, therefore maintenance is also very convenient.
Claims (4)
1. Wear-resitsting pistons, compression and oil groove are arranged at its top, the piston pin boss hole is arranged on the piston skirt, it is characterized in that: the base of piston skirt is flat limit, the bottom of piston skirt has the annular groove that has through hole together at least, be with the elastic guide snap ring on the annular groove, the external diameter of elastic guide snap ring is bigger than the external diameter of piston skirt.
2. Wear-resitsting pistons according to claim 1 is characterized in that: the through hole of described annular groove is a manhole.
3. Wear-resitsting pistons according to claim 1 is characterized in that: the through hole of described annular groove is a square through hole.
4. Wear-resitsting pistons according to claim 1 is characterized in that: the through hole of described annular groove is the trapezoidal hole for sleeping in of two symmetry combinations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201040078U CN201137530Y (en) | 2008-01-07 | 2008-01-07 | Abrasion-proof piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201040078U CN201137530Y (en) | 2008-01-07 | 2008-01-07 | Abrasion-proof piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201137530Y true CN201137530Y (en) | 2008-10-22 |
Family
ID=40038217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201040078U Expired - Fee Related CN201137530Y (en) | 2008-01-07 | 2008-01-07 | Abrasion-proof piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201137530Y (en) |
-
2008
- 2008-01-07 CN CNU2008201040078U patent/CN201137530Y/en not_active Expired - Fee Related
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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: 20081022 Termination date: 20120107 |