CN200999665Y - Motorcycle engine piston - Google Patents
Motorcycle engine piston Download PDFInfo
- Publication number
- CN200999665Y CN200999665Y CNU2007201234045U CN200720123404U CN200999665Y CN 200999665 Y CN200999665 Y CN 200999665Y CN U2007201234045 U CNU2007201234045 U CN U2007201234045U CN 200720123404 U CN200720123404 U CN 200720123404U CN 200999665 Y CN200999665 Y CN 200999665Y
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- Prior art keywords
- piston
- skirt
- cylinder
- utility
- piston skirt
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- Expired - Fee Related
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- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model discloses a motorcycle engine piston, which comprises a piston head (1) and a piston skirt (2). Wherein, a piston ring installation slot (2e) is opened on the circumference at upper section of the piston skirt (2) whose circumference at lower section is composed of two planes (2a) and two arc surfaces (2b) positioned in alteration; piston pin holes (2c) are symmetrically opened on the two planes (2a) at lower section of the piston skirt (2); the top surface of the piston head (1) is a plane and an oil slot (2d) is opened on the two arc surfaces (2b) at lower section of the piston skirt (2). The utility model can fully burn the mixed gas in the firebox, can properly lower the compress rate, reduce the temperature of the cylinder and improve the piston performance as well as reduce the noise ad the abnormal sound of the thermo motor at cylinder head; besides, by adding the oil slot at the piston skirt, the utility model enhances the oil storage function, reduces the friction between the piston and the cylinder when the piston is moving, and prolongs the piston and service life of the cylinder.
Description
Technical field
The utility model belongs to the motorcycle engine technical field, specifically, relates to a kind of motorcycle engine piston.
Background technique
General motorcycle engine piston is installed in the cylinder head, is made of piston crown and piston skirt.Wherein piston crown is considered from moulding, its end face generally is arch, have the piston ring mounting groove on the circumferential surface on top, piston skirt, the side face of bottom of skirt is made up of two planes and two arc surfaces that are provided with at interval, and symmetry offers piston pin hole on two planes.Wrist pin passes from described piston pin hole, and engine piston is installed on the connecting rod.The end face of engine piston and the ball-and-socket of cylinder head form the firing chamber of sealing, and when piston motion during to the indoor mixed gas of top dead center compression and combustion, plug ignition makes the mixed gas burning, promotes piston and moves downward.Because the end face of piston is an arch, when the air-flow that the mixed gas burning produces promoted the end face of piston, airflow direction changed along arch, and thrust is decomposed, and can not act on piston head better, caused mixed gas insufficient in the firing chamber internal combustion; If recently improve the combustion of mixed gas effect by improving compression, correspondingly can produce hot machine noise of cylinder head and abnormal sound again.In addition, the whole height of engine piston is big, Heavy Weight, and cost is higher; And piston is in cylinder during to-and-fro motion, lacks lubricatedly between piston outer wall and the cylinder, makes the serious wear of piston and cylinder to greatly reduce its working life.
The model utility content
Technical problem to be solved in the utility model is to provide a kind of can make the mixed gas sufficient combustion, and can effectively reduce the motorcycle engine piston of motion wearing and tearing.
The technical solution of the utility model is as follows: a kind of motorcycle engine piston, comprise piston crown and piston skirt, wherein have the piston ring mounting groove on the circumferential surface on top, piston skirt, the side face of this bottom of skirt is made up of two planes and two arc surfaces that are provided with at interval, symmetry offers piston pin hole on two planes of bottom of skirt, its key is: the end face of described piston crown is the plane, offers oil groove on two arc surfaces of described bottom of skirt.
Adopt above technological scheme, because the end face of engine piston is the plane, promptly be equivalent to change the shape of the firing chamber that forms between piston-top surface and the cylinder head, the air-flow of mixed gas burning generation can promote piston motion better like this, makes mixed gas more abundant in the firing chamber internal combustion; Simultaneously, can suitably reduce compression ratio, to reduce hot machine noise of cylinder head and abnormal sound.Compare with background technique, the overall height dimension of piston reduces, and moves on the position of piston ring mounting groove and piston pin hole is relative, has alleviated the weight of piston greatly, has reduced cost of production, and has reduced the to-and-fro motion inertia of piston in cylinder.Offer oil groove on two arc surfaces of bottom of skirt, the to-and-fro motion by piston can guarantee to have between piston and the cylinder sufficient lubricated, and the wearing and tearing between piston and the cylinder are reduced greatly, has effectively prolonged the working life of piston and cylinder.
Offer 1～4 road oil groove on the arc surface of above-mentioned bottom of skirt, this oil groove is parallel to described piston ring mounting groove.The number of oil groove is many more, and the lubricant oil of storage is just many more, piston lubricated just more abundant when to-and-fro motion and between the cylinder; And oil groove is parallel with the piston ring mounting groove, both has been convenient to processing, can further strengthen the oil storage effect again.
The beneficial effects of the utility model are:
1, it can make mixed gas more abundant in the firing chamber internal combustion, can suitably reduce compression ratio, reduces the cylinder temperature, improves the performance of piston, reduces hot machine noise of cylinder head and abnormal sound.
2, weight saving about 24%, reduced the to-and-fro motion inertia of piston in cylinder.
3, increase the piston skirt oil groove, strengthened the oil storage function, when having reduced piston motion and the friction between the cylinder, prolonged the working life of piston and cylinder.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
As shown in Figure 1, the utility model is by the casting global formation, have piston crown 1 and piston skirt 2, wherein the end face of piston crown 1 is the plane, so that the mixed gas burning time can promote piston motion better, on the circumferential surface on 2 tops, piston skirt, have piston ring mounting groove 2e, for ring installation.The side face of 2 bottoms, described piston skirt is made up of the two plane 2a and the two arc surface 2b that are provided with at interval, and symmetry offers piston pin hole 2c on two plane 2a of 2 bottoms, piston skirt, passes for wrist pin, and piston is installed on the connecting rod.And on two arc surface 2b of 2 bottoms, piston skirt, offering the oil groove 2d that 1～4 road can oil storage, this oil groove 2d is parallel to described piston ring mounting groove 1a.In the present embodiment, offer 3 road oil groove 2d on the arc surface 2b.
Claims (2)
1, a kind of motorcycle engine piston, comprise piston crown (1) and piston skirt (2), wherein have piston ring mounting groove (2e) on the circumferential surface on top, piston skirt (2), the side face of bottom, this piston skirt (2) is made up of two planes (2a) and two arc surfaces (2b) that are provided with at interval, two planes (2a) of (2) bottom are gone up symmetry and are offered piston pin hole (2c) in the piston skirt, it is characterized in that: the end face of described piston crown (1) is the plane, offers oil groove (2d) on two arc surfaces (2b) of bottom, described piston skirt (2).
2, motorcycle engine piston according to claim 1 is characterized in that: offer 1～4 road oil groove (2d) on the arc surface (2b) of bottom, described piston skirt (2), this oil groove (2d) is parallel to described piston ring mounting groove (2e).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201234045U CN200999665Y (en) | 2007-01-23 | 2007-01-23 | Motorcycle engine piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201234045U CN200999665Y (en) | 2007-01-23 | 2007-01-23 | Motorcycle engine piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200999665Y true CN200999665Y (en) | 2008-01-02 |
Family
ID=39014072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201234045U Expired - Fee Related CN200999665Y (en) | 2007-01-23 | 2007-01-23 | Motorcycle engine piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200999665Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107917013A (en) * | 2016-10-11 | 2018-04-17 | 现代自动车株式会社 | Piston assembly with improved greasy property |
-
2007
- 2007-01-23 CN CNU2007201234045U patent/CN200999665Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107917013A (en) * | 2016-10-11 | 2018-04-17 | 现代自动车株式会社 | Piston assembly with improved greasy property |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: LIFAN INDUSTRIAL (GROUP) CO. Free format text: FORMER NAME OR ADDRESS: CHONGQING LIFAN INDUSTRY (GROUP) CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Chongqing city Shapingba District zhangjiewan Bridge No. 60, zip code: 400037 Patentee after: Lifan Industry (Group) Co., Ltd. Address before: Chongqing city Shapingba District zhangjiewan Bridge No. 60, zip code: 400037 Patentee before: Lifan Industry (Group) Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080102 Termination date: 20110123 |