CN202300682U - Cylinder head for motor cycle engine - Google Patents
Cylinder head for motor cycle engine Download PDFInfo
- Publication number
- CN202300682U CN202300682U CN 201120408792 CN201120408792U CN202300682U CN 202300682 U CN202300682 U CN 202300682U CN 201120408792 CN201120408792 CN 201120408792 CN 201120408792 U CN201120408792 U CN 201120408792U CN 202300682 U CN202300682 U CN 202300682U
- Authority
- CN
- China
- Prior art keywords
- cylinder head
- rocking arm
- fixing seat
- fixed base
- arm assembly
- 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 - Lifetime
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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The utility model discloses a cylinder head for a motor cycle engine, which includes a cylinder head body, wherein a cavity is arranged in the cylinder head body; a cast-iron rocking arm fixing seat is arranged in the cavity; and a first fixing seat used for mounting a rocking arm assembly, a second fixing seat used for mounting a middle cylinder connection nut, and a third fixing seat used for supporting the rocking arm assembly are arranged on the cast-iron rocking arm fixing seat respectively. The cylinder head for the motor cycle engine adopts the structure, so that the rocking arm assembly, the middle cylinder connection nut and other connecting pieces can be mounted in an integrated manner through the cast-iron rocking arm fixing seat, as a result, the difference of thermal expansion coefficients of all the connecting pieces can be reduced, the variation of all the temperature sections of all the connecting pieces is within a smaller range during the operation of the engine, and the performance of the engine is not influenced.
Description
Technical field
The utility model relates to a kind of motorcycle engine cylinder head.
Background technique
In the existing motorcycle industry, the cylinder head of motor generally uses aluminium alloy casting to form, yet in motor, uses steel or cast iron materials manufacturing with parts such as the Rocker arm assembly of cylinder head cooperating and push rod combinations.Can know that according to the metallic material thermal expansion coefficient under the situation of uniform temp, the thermal expansion of aluminum alloy material is more a lot of greatly than the thermal expansion of ferrous materials or cast iron materials.Therefore; Motor in use; When appearance aluminium alloy cylinder head expanded along with the rising of temperature, the parts of ferrous materials or cast iron materials manufacturing expanded than cylinder head much less, cause the connecting bolt of cylinder head and Rocker arm assembly, middle cylinder attaching nut to receive the stretching in cycle like this; Be easy to generate the situation of loosening or fatigue fracture, the motor global reliability is influenced.Because the difference of swell increment, be fixed on the gap increase between Rocker arm assembly and the push rod combination on the cylinder head, cause the valve clearance to increase thereupon, the engine producing noise is big.The variation of valve clearance, the thermal efficiency that combustion system of engine is produced reduces, and power descends.
Summary of the invention
The technical problem that the utility model will solve provides a kind of motorcycle engine cylinder head; To reduce the difference of thermal expansion coefficient between each link; The variation of each link in each temperature section is in less relatively scope when making engine operation, ensures that engine performance is unaffected.
In order to solve the problems of the technologies described above; A kind of motorcycle engine cylinder head of the utility model; Comprise the cylinder head body; Have cavity in the said cylinder head body, be provided with cast iron rocking arm fixed base in this cavity, be respectively arranged with first fixed base that is used for installing Rocker arm assembly on the cast iron rocking arm fixed base, be used to the 3rd fixed base cylinder attaching nut's second fixed base being installed and being used to support Rocker arm assembly.
The beneficial effect of the utility model is: this motorcycle engine cylinder head is owing to adopt said structure; Unify to install links such as Rocker arm assembly, middle cylinder attaching nut through cast iron rocking arm fixed base; Can reduce the difference of thermal expansion coefficient between each link; The variation of each link in each temperature section is in less relatively scope when making engine operation, ensures that engine performance is unaffected.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation.
Fig. 1 is the structural representation of the utility model;
Fig. 2 is a cast iron rocking arm fixed seat structure schematic representation.
Embodiment
With reference to Fig. 1, Fig. 2; A kind of motorcycle engine cylinder head of the utility model; Comprise cylinder head body 1; Have cavity 2 in the said cylinder head body 1, be provided with cast iron rocking arm fixed base 3 in this cavity 2, be respectively arranged with first fixed base 4 that is used for installing Rocker arm assembly on the cast iron rocking arm fixed base 3, be used to the 3rd fixed base 6 cylinder attaching nut's second fixed base 5 being installed and being used to support Rocker arm assembly.This motorcycle engine cylinder head is owing to adopt said structure; Unify to install links such as Rocker arm assembly, middle cylinder attaching nut through cast iron rocking arm fixed base; Can reduce the difference of thermal expansion coefficient between each link; The variation of each link in each temperature section is in less relatively scope when making engine operation, ensures that engine performance is unaffected.Leave certain metric space between cast iron rocking arm fixed base and the cylinder head body; The interference phenomenon that occurs with the cylinder head body distortion of the inconsistent generation of distortion of Rocker arm assembly and rocking arm fixed base lower end surface when avoiding because of the cylinder head temperature distortion; Make the valve clearance stable, reduce noise.Torsion is with low uncertainty behind connecting bolt, the hot machine of connection cover type nut, connects reliable.Integrated type cast iron rocking arm fixed base forms a whole on the land of center through connecting tendon, makes an entire cylinder casting technique more convenient.
The above is merely the preferential mode of execution of the utility model, as long as realize that with basic identical means the technological scheme of the utility model purpose all belongs within the protection domain of the utility model.
Claims (1)
1. motorcycle engine cylinder head; Comprise cylinder head body (1); It is characterized in that having cavity (2) in the said cylinder head body (1); Be provided with cast iron rocking arm fixed base (3) in this cavity (2), be respectively arranged with first fixed base (4) that is used for installing Rocker arm assembly on the cast iron rocking arm fixed base (3), be used to the 3rd fixed base (6) cylinder attaching nut's second fixed base (5) being installed and being used to support Rocker arm assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120408792 CN202300682U (en) | 2011-10-25 | 2011-10-25 | Cylinder head for motor cycle engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120408792 CN202300682U (en) | 2011-10-25 | 2011-10-25 | Cylinder head for motor cycle engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202300682U true CN202300682U (en) | 2012-07-04 |
Family
ID=46369601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120408792 Expired - Lifetime CN202300682U (en) | 2011-10-25 | 2011-10-25 | Cylinder head for motor cycle engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202300682U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109184934A (en) * | 2018-08-03 | 2019-01-11 | 重庆隆鑫发动机有限公司 | Inserts, engine cylinder head and engine |
-
2011
- 2011-10-25 CN CN 201120408792 patent/CN202300682U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109184934A (en) * | 2018-08-03 | 2019-01-11 | 重庆隆鑫发动机有限公司 | Inserts, engine cylinder head and engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120704 |