CN204060959U - Wear-resitsting pistons - Google Patents
Wear-resitsting pistons Download PDFInfo
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- CN204060959U CN204060959U CN201420355183.4U CN201420355183U CN204060959U CN 204060959 U CN204060959 U CN 204060959U CN 201420355183 U CN201420355183 U CN 201420355183U CN 204060959 U CN204060959 U CN 204060959U
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- Prior art keywords
- skirt section
- piston
- oil
- wear
- section
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- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model relates to a kind of Wear-resitsting pistons, belongs to Piston Machining technical field.This piston comprises head and is connected to the skirt section of head lower end, and described head is provided with oil ring groove, and the both sides in described skirt section are provided with two relative pin-and-holes; The cross section in described skirt section is oval, and described skirt section is provided with some oil throughs.This piston long service life and wear-resisting.
Description
Technical field
The utility model relates to a kind of piston coordinated with cylinder, and especially a kind of wear-resisting piston, belongs to Piston Machining technical field.
Background technique
There is strict matching gap when piston normally works and between cylinder, because the effect of high-temperature expansion, in order to prevent seizure of piston in cylinder, usually can take some special measures in the structure of piston:
1) because the temperature of upper piston area is high, swell increment wants large, so generally piston is made up-small and down-big taper shape;
2) because the side pressure of piston skirt long axis direction is large, so usually ellipse is made in the skirt section of piston, oval major axis is in the direction perpendicular to key seat axially bored line;
3) multiple oil through is set in the oil ring groove of piston crown, can cools and lubrication assistant skirt section, reduce thus the thermal expansion in skirt section.
Because piston in cylinder high temperature, at a high speed, lubricating difficulties and too small with the matching gap of cylinder, so require that piston material has enough intensity, rigidity, less density and expansion coefficient, common used material is aluminum alloy.General known piston is by head and skirt section composition at present, and skirt section is arm contact in cylinder, is the motion guide of piston.
According to the applicant understood, in order to reduce the friction and wear between piston and piston/cylinder, extend the life-span of piston and piston cylinder, existing piston is generally provided with oil guiding hole on head, in use, by oil guiding hole, lubricant oil is thrown to piston exterior, makes the surface attachment of cylinder body and piston contact have film lubrication, prevent piston and cylinder body from occurring inordinate wear.
In addition; the skirt section of piston does not contact when normally using with cylinder body; and there is no lubricant oil between the outer skirt surface of usual piston and piston/cylinder yet; but As time goes on, can there is slight deformation in piston and cylinder body, when distortion is accumulated to a certain degree; the skirt section of piston and cylinder body can be caused to produce rub; so not only reduce the working life of piston and cylinder body, and it is not steady that piston and cylinder body are run, easily generation accident.
Model utility content
The technical problem that the utility model solves is: overcome the deficiencies in the prior art, propose a kind of long service life and wear-resisting piston.
In order to solve the problems of the technologies described above, the technological scheme that the utility model proposes is: a kind of Wear-resitsting pistons, and comprise head and the skirt section being connected to head lower end, described head is provided with oil ring groove, the cross section in described skirt section is oval, and the both sides in described skirt section are provided with two relative pin-and-holes; Described skirt section is provided with some oil throughs.
The improvement of technique scheme is: described skirt section is provided with horizontal heat dam and the expansion slot of longitudinal direction, and described oil through is positioned at heat dam and/or expansion slot.
The further improvement of technique scheme is: described oil through is positioned on the line of the major axis end points of all cross sections in skirt section.Preferably, the both sides in described oil through separation skirt section, every side is provided with 4 oil throughs, and the diameter of described oil through is less than or equal to 2mm.
The further improvement of technique scheme is: the outer circumferential face in described skirt section is provided with some counterbores.Preferably, the degree of depth of described counterbore is less than or equal to 1mm.
The beneficial effect that the utility model brings is: 1) the utility model is provided with oil through in the skirt section of piston, such piston operationally can throw away part oil to skirt surface, the effect in lubrication skirt section can be played, avoid the piston skirt that causes because of piston and cylinder body generation slight deformation and cylinder body produces dry friction, thus add the wear resistance of piston, and extend the life-span of piston.2) the utility model offers horizontal heat dam and longitudinal expansion slot in the skirt section of piston, and heat dam can prevent the heat of piston crown from spreading to skirt section, reduce the distortion that skirt section causes because of thermal expansion, and the thermal expansion that expansion slot is skirt section leaves compensating action.3) cross section in skirt section is made ellipse by piston of the present utility model, the distortion produced by factors such as thermal expansions during such work is along gudgeon pin shaft Directional Extension, skirt section cross section is made to become sub-circular, thus can obtain when pistons work wider evenly supporting plane, also make the skirt section of piston and cylinder wall fit better simultaneously, reduce and join cylinder air gap, be conducive to reducing piston skirt specific pressure, reduce the impact of piston countercylinder wall, reduce noise when motor runs.4) the utility model arranges oil-containing counterbore on the outer circumferential face in skirt section, even if can not throw away lubricant oil from oil through in certain period like this, also can ensure the lubrication between piston and cylinder body, thus extends the working life of piston and cylinder body further.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Fig. 1 is the structural representation of the utility model embodiment one.
Fig. 2 is the left view of Fig. 1.
Embodiment
Embodiment one
The Wear-resitsting pistons of the present embodiment, as depicted in figs. 1 and 2, comprise head 1 and be connected to the skirt section 2 of head lower end, head 1 is provided with oil ring groove 3, and the both sides in skirt section 2 are provided with two relative pin-and-holes 4; The position of skirt section 2 between two pin-and-holes 4 has oil through 5.Like this, the piston of this sample embodiment operationally can throw away the surface of part oil to skirt section 2 by oil through 5, play the effect in lubrication skirt section 2, avoid the skirt section 2 caused because of piston and cylinder body generation slight deformation and produce dry friction with cylinder body, thus not only add the wear resistance of piston, and extend the life-span of piston.
The cross section in the skirt section 2 in the present embodiment is oval, and oil through 5 is preferably opened on the line of the major axis end points of all cross sections in skirt section 2, can make skirt section 2 can all sufficient lubrications like this.
As further preferred version, oil through 5 is lived apart the both sides in skirt section 2, and every side is provided with 4 oil throughs 5, and the diameter of oil through 5 is less than or equal to 2mm.
Embodiment two
The Wear-resitsting pistons of the present embodiment is the improvement on embodiment one basis, is with the difference of embodiment one: skirt section 2 is provided with horizontal heat dam.Like this, heat dam can prevent the heat of piston crown 1 from spreading to skirt section 2, reduces the distortion that skirt section 2 causes because of thermal expansion.
Embodiment three
The Wear-resitsting pistons of the present embodiment is the improvement on embodiment one basis, is with the difference of embodiment one: skirt section 2 is provided with longitudinal expansion slot, and oil through 5 is arranged in expansion slot.Like this, expansion slot is that the thermal expansion in skirt section 2 leaves compensating action.
The present embodiment can also do following improvement: the outer circumferential face in skirt section 2 is provided with some counterbore (not shown)s.Like this, certain lubricant oil can be stored in counterbore, even if even if like this lubricant oil can not be thrown away from oil through in certain period, the lubrication between piston and cylinder body also can be ensured, contribute to reducing further the friction that skirt section 2 produces with cylinder body.Preferably, the degree of depth of counterbore is less than 1mm, is preferably 0.5mm.
The utility model is not limited to the concrete technological scheme described in above-described embodiment, the technological scheme of each embodiment above-mentioned of the present utility model combined crosswise can form new technological scheme each other, such as: skirt section 2 can be provided with horizontal heat dam and the expansion slot of longitudinal direction simultaneously, etc.All employings are equal to replaces the technological scheme formed and is the protection domain that the utility model requires.
Claims (6)
1. a Wear-resitsting pistons, comprise head and be connected to the skirt section of head lower end, described head is provided with oil ring groove, and the both sides in described skirt section are provided with two relative pin-and-holes; It is characterized in that: the cross section in described skirt section is for oval, and described skirt section is provided with some oil throughs.
2. Wear-resitsting pistons according to claim 1, is characterized in that: described skirt section is provided with horizontal heat dam and the expansion slot of longitudinal direction, and described oil through is positioned at heat dam and/or expansion slot.
3. Wear-resitsting pistons according to claim 1 and 2, is characterized in that: described oil through is positioned on the line of the major axis end points of all cross sections in skirt section.
4. Wear-resitsting pistons according to claim 3, is characterized in that: the both sides in described oil through separation skirt section, every side is provided with 4 oil throughs, and the diameter of described oil through is less than or equal to 2mm.
5. Wear-resitsting pistons according to claim 1 and 2, is characterized in that: the outer circumferential face in described skirt section is provided with some counterbores.
6. Wear-resitsting pistons according to claim 5, is characterized in that: the degree of depth of described counterbore is less than or equal to 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420355183.4U CN204060959U (en) | 2014-06-30 | 2014-06-30 | Wear-resitsting pistons |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420355183.4U CN204060959U (en) | 2014-06-30 | 2014-06-30 | Wear-resitsting pistons |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204060959U true CN204060959U (en) | 2014-12-31 |
Family
ID=52202490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420355183.4U Expired - Fee Related CN204060959U (en) | 2014-06-30 | 2014-06-30 | Wear-resitsting pistons |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204060959U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179590A (en) * | 2014-06-30 | 2014-12-03 | 泰州市优力克机械制造有限公司 | Wear-resistant piston |
-
2014
- 2014-06-30 CN CN201420355183.4U patent/CN204060959U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179590A (en) * | 2014-06-30 | 2014-12-03 | 泰州市优力克机械制造有限公司 | Wear-resistant piston |
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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: 20141231 Termination date: 20150630 |
|
| EXPY | Termination of patent right or utility model |