CN210799163U - Motorcycle engine piston structure - Google Patents
Motorcycle engine piston structure Download PDFInfo
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- CN210799163U CN210799163U CN201921447880.1U CN201921447880U CN210799163U CN 210799163 U CN210799163 U CN 210799163U CN 201921447880 U CN201921447880 U CN 201921447880U CN 210799163 U CN210799163 U CN 210799163U
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- piston
- bridging parts
- radian
- bridging
- pin
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Abstract
The utility model discloses a motorcycle engine piston structure, which is characterized by comprising a piston body and a piston pin sleeved on the piston body, wherein the piston body comprises a piston head and two piston side skirts, the outer edge of the piston head on the radial surface is superposed with the arc outer edge of the piston side skirt, two bridging parts are connected between the two piston side skirts, the piston pin is connected on the bridging parts, the bridging parts integrally have a radian on the axial surface, the transitional connection part of the piston side skirt and the bridging parts is in an arc shape, the two bridging parts on the radial surface have a radian, and the arcs of the two bridging parts are opposite and outward; the advantage is under the high temperature condition at the during operation, the bridge portion is heated and expands, because the whole radian that has of bridge portion on the axial plane, two piece bridge portions have the radian on the radial face, can alleviate the power to the piston side skirt after the inflation, prevent to influence the normal operating of piston, also can increase the life of piston simultaneously.
Description
Technical Field
The utility model relates to a piston especially relates to a motorcycle engine piston structure.
Background
The motorcycle engine piston mainly comprises a piston head positioned on the upper part, a piston side skirt positioned on the lower part and a piston pin hole positioned in the middle part of the piston side skirt, the piston is arranged in the cylinder body and is connected with a connecting rod at the lower end through a piston pin, the piston moves up and down along the cylinder under the action of the explosion pressure of fuel gas in a combustion chamber, and power is transmitted to a crankshaft through the connecting rod.
The utility model discloses a chinese utility model patent of publication number 205172746U discloses a small discharge capacity motorcycle engine piston, including arranging cylindrical piston head 9 of top in and arranging the cylinder piston skirt portion 8 of below in, and be located the piston pinhole in the middle of piston skirt portion 8 and the pin boss of supporting the piston pin, both sides are provided with the a plane about piston pin boss 7, piston pin boss 7 is the plane and is parallel arrangement, can be too high because of the piston internal temperature, piston pin boss 7 can be heated the inflation, as shown in fig. 1, for the direction of above-mentioned piston inflation after being heated, the expanded power directly passes to on the piston skirt portion 8, outwards struts piston skirt portion 8 easily, just can increase the frictional force between piston skirt portion 8 and the combustion chamber, influence the normal work of piston even.
Disclosure of Invention
The utility model aims to solve the technical problem that a longer motorcycle engine piston structure of life is provided, can alleviate the outside power of strutting of piston pin boss inflation back to piston skirt portion to prevent to cause the influence to the normal work of piston.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: the piston body comprises a piston head and two piston side skirts, the outer edge of the piston head on the radial surface is superposed with the arc-shaped outer edge of the piston side skirts, two bridging parts are connected between the two piston side skirts, the piston pin is connected to the bridging parts, the bridging parts integrally have a radian on the axial surface, the transitional connection part between the piston side skirts and the bridging parts is arc-shaped, the two bridging parts on the radial surface have radians, and the arc mouths of the two bridging parts are opposite and outward.
The utility model discloses a further preferred scheme does: the bridging part is provided with a pin hole, and the piston pin is sleeved in the pin hole in a penetrating way.
The utility model discloses a further preferred scheme does: the top end of the piston head is provided with an inwards concave pit, so that the combustion efficiency of the combustion chamber is improved.
Compared with the prior art, the utility model has the advantages of include the piston body and wear the piston pin of cover on the piston body, the piston body includes piston head and two piston side skirts, the outer fringe of piston head and the arc outer fringe coincidence of piston side skirt on the radial face, connect two bridge departments between two piston side skirts, the piston pin is connected on the bridge department, the bridge department wholly has the radian on the axial face, piston side skirt and bridge department of transition are the arc, two bridge departments have the radian on the radial face, two opposite outside bridge departments, under the high temperature condition of during operation, the bridge department is heated the inflation, because the bridge department wholly has the radian on the axial face, two bridge departments have the radian on the radial face, can alleviate the power to the piston side skirt after the inflation, prevent to influence the normal operation of piston, simultaneously also can increase the life of piston.
Drawings
FIG. 1 is a schematic view of a conventional piston expanding after being heated;
figure 2 is a schematic structural view of the present invention,
fig. 3 is a cross-sectional view of the present invention;
FIG. 4 is a schematic view (one) of the expansion direction of the piston after being heated according to the present invention;
fig. 5 is a schematic view (ii) showing the expansion direction of the piston after being heated.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
As shown in fig. 2, a motorcycle engine piston structure, including piston body 1 and the piston pin 2 of wearing the cover on piston body 1, piston body 1 includes piston head 3 and two piston side skirts 4, the outer fringe of piston head 3 coincides with the arc outer fringe of piston side skirt 4 on the radial surface, connect two bridging portions 5 between two piston side skirts 4, the pinhole 51 has been seted up on bridging portion 5, piston pin 2 wears to overlap in pinhole 51, bridging portion 5 wholly has the radian on the axial surface, piston side skirt 4 is the arc with bridging portion 5 transitional coupling department, two bridging portions 5 have the radian on the radial surface, two opposite outwards of bridging portion 5 arcs.
As shown in fig. 3, the top end of the piston head 3 is provided with an inwardly concave pit 31, which can effectively improve the combustion efficiency of the combustion chamber.
As shown in fig. 4, under the high temperature condition during operation, the bridge portion 5 is heated and expanded, the bridge portion 5 has a radian on the whole axial surface, two bridge portions 5 on the radial surface have a radian, the expansion direction of the expanded force is arc-shaped, the tension generated after the expansion of the bridge portion 5 can be reduced, the tension is prevented from directly rushing towards the piston side skirt 4, the tension which expands the piston side skirt 4 outwards is reduced, and the normal operation of the piston is influenced.
It is right above the utility model provides a motorcycle engine piston structure introduces in detail, and it is right to have used specific individual example herein the utility model discloses a principle and implementation mode have been elucidated, and the description of above embodiment is only used for helping understanding the utility model relates to a core thought. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (3)
1. A motorcycle engine piston structure, its characterized in that: the piston comprises a piston body and a piston pin sleeved on the piston body in a penetrating mode, the piston body comprises a piston head and two piston side skirts, the outer edge of the piston head on the radial surface is overlapped with the arc-shaped outer edge of each piston side skirt, two bridging parts are connected between the two piston side skirts, the piston pin is connected to the bridging parts, the bridging parts integrally have a radian on the axial surface, the transitional connection positions of the piston side skirts and the bridging parts are arc-shaped, the two bridging parts on the radial surface have radians, and the arc openings of the two bridging parts face to the outside in an opposite mode.
2. A motorcycle engine piston structure according to claim 1, wherein: the bridging part is provided with a pin hole, and the piston pin is sleeved in the pin hole in a penetrating way.
3. A motorcycle engine piston structure according to claim 1, wherein: the top end of the piston head is provided with an inwards concave pit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921447880.1U CN210799163U (en) | 2019-09-02 | 2019-09-02 | Motorcycle engine piston structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921447880.1U CN210799163U (en) | 2019-09-02 | 2019-09-02 | Motorcycle engine piston structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210799163U true CN210799163U (en) | 2020-06-19 |
Family
ID=71239956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921447880.1U Active CN210799163U (en) | 2019-09-02 | 2019-09-02 | Motorcycle engine piston structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210799163U (en) |
-
2019
- 2019-09-02 CN CN201921447880.1U patent/CN210799163U/en active Active
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