CN201661372U - General gasoline engine cylinder head - Google Patents

Abstract

A general-purpose gasoline engine cylinder head has a cylinder head body, the top surface of the cylinder head body is a trapezoidal ring structure, and the adjacent sides of the trapezoid are transitioned through circular arcs, and the right part of the outer edge of the top front side of the cylinder head body A first lug is provided, a second lug is provided on the outer edge of the rear edge of the top surface of the cylinder head body, a third lug is provided on the outer edge of the connection between the left side of the top surface of the cylinder head body and the front side, and the right outer edge of the top surface of the cylinder head body The rear part along the edge is provided with a fourth lug, and each lug of the cylinder head body is provided with a screw hole, and the second lug is located at the right part of the outer edge of the rear edge of the top surface of the cylinder head body. The rear end of the left outer edge of the top surface of the main body is provided with a fifth lug, and the fifth lug is also provided with a screw hole. The utility model has reasonable design, simple structure and convenient transformation. By setting the screw hole spacing of adjacent lugs on the five lugs to be basically the same, it can ensure that the strength of each stress-bearing part after the cylinder head cover is installed is uniform, and the sealing gasket is The compression deformation effect is good, which is beneficial to improve the sealing performance.

Description

General gasoline engine cylinder head

technical field

The utility model relates to a gasoline engine component, in particular to a cylinder head on a general gasoline engine.

Background technique

The cavity on the upper part of the general gasoline engine cylinder head is sealed by the cylinder head cover. The structure of the traditional cylinder head is shown in FIG. 2 , which has a cylinder head body 1 , the top surface of the cylinder head body 1 is a trapezoidal ring structure, and the adjacent sides of the trapezoid are transitioned by circular arcs. A first lug 1a is provided on the right side of the outer edge of the top front side of the cylinder head body 1, and a second lug 1b is provided on the left side of the rear outer edge of the top surface of the cylinder head body 1. The left side and the front side of the top surface of the cylinder head body 1 The outer edge of the joint is provided with a third lug 1c, and the rear part of the right outer edge of the top surface of the cylinder head body 1 is provided with a fourth lug 1d. Screw holes 1f are provided on each lug on the top surface of the cylinder head body 1, and the top surface of the cylinder head body 1 is connected to the cylinder head cover by screws through the screw holes on the lugs.

A gasket is arranged between the cylinder head and the cylinder head cover. When the cylinder head and the cylinder head cover are fastened together by screws, the gasket is compressed and deformed to achieve a sealing effect. Since the screw holes of the four lugs on the top surface of the cylinder head are arranged on unequal sides, especially the distance between the screw holes between the second lug 1b and the third lug 1c and between the second lug 1b and the fourth lug 1d If it is too large and crosses the arc section, the strength of the middle part between the second lug 1b and the third lug 1c and the second lug 1b and the fourth lug 1d is weak, so it cannot be fully bonded to the cylinder head cover. The sealing gasket is deformed, so the sealing effect is poor, and it is easy to cause oil leakage and air leakage. On the one hand, it will affect the performance of the gasoline engine; on the other hand, the oil overflows from the gap between the cylinder head and the cylinder head cover, which will damage the appearance of the gasoline engine. . In order to prevent engine oil from overflowing, some manufacturers use a hammer to strike the gasket to completely deform it. However, the use of a hammer to strike may easily cause damage to the cylinder head cover, and additionally increase the workload of the workers, and the effect is not ideal.

Utility model content

The technical problem to be solved by the utility model is to provide a general gasoline engine cylinder head which can effectively improve the sealing effect.

The technical scheme of the utility model is as follows: a general-purpose gasoline engine cylinder head has a cylinder head body. The right part of the outer edge of the top front side is provided with a first lug, the rear outer edge of the top surface of the cylinder head body is provided with a second lug, and the outer edge of the top surface of the cylinder head body where the left side connects to the front is provided with a third lug , the rear part of the right outer edge of the top surface of the cylinder head body is provided with a fourth lug, and each lug of the cylinder head body is provided with screw holes. The key is that the second lug is located on the top surface of the cylinder head body The right part of the outer edge of the rear edge is provided with a fifth lug at the rear end of the outer edge of the left side of the top surface of the cylinder head body, and the fifth lug is also provided with a screw hole.

The utility model adds a lug to the outer edge of the top surface of the cylinder head, and adjusts the position of the lug, so that the hole distances of the screw holes on two adjacent lugs are close to each other, and the adaptability of the cylinder head cover is improved. After fastening the rear cylinder head cover, since the two adjacent lug screw holes on the top surface of the cylinder head are close to a straight line seal, they hardly cross the arc section, and the strength of each force-bearing part is uniform, which can ensure that the gasket is evenly deformed under pressure, thereby It effectively improves the sealing effect, eliminates the disadvantages of oil leakage and air leakage, and improves the performance of the gasoline engine.

In order to facilitate processing and reduce costs, the lugs and the cylinder head body are of an integral structure.

Beneficial effects: the utility model has reasonable design, simple structure, and convenient transformation. By setting the screw hole spacing of adjacent lugs on the five lugs to be basically consistent, it can ensure that the strength of each stress-bearing part after the cylinder head cover is installed is uniform. The gasket has a good compression deformation effect, which is beneficial to improve the sealing performance.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a schematic structural diagram of the background technology.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

As shown in Figure 1, a general gasoline engine cylinder head has a cylinder head body 1, the top surface of the cylinder head body 1 is a trapezoidal annular structure with a small front and a large rear, and the adjacent sides of the trapezoid are transitioned by circular arcs . A first lug 1a is integrally formed on the right part of the top front outer edge of the cylinder head body 1, and a screw hole 1f is opened on the first lug 1a. A second lug 1b is integrally formed on the right part of the rear outer edge of the top surface of the cylinder head body 1, and a screw hole 1f is opened on the second lug 1b. A third lug 1c is integrally formed on the outer edge of the connection between the left side of the top surface of the cylinder head body 1 and the front side, and a screw hole 1f is opened on the third lug 1c. A fifth lug 1e is integrally formed at the rear end of the left outer edge of the top surface of the cylinder head body 1, and a screw hole 1f is opened on the fifth lug 1e. The rear portion of the right outer edge of the top surface of the cylinder head body 1 is integrally formed with a fourth lug 1d, and a screw hole 1f is also opened on the fourth lug 1d. The hole diameters of the screw holes 1f on the above lugs are equal, and the distance between the screw holes on two adjacent lugs is similar, so that the installation point of the cylinder head cover is adapted so that five screws can pass through the cylinder head body The screw holes of the five lugs on 1 fasten the cylinder head cover to the cylinder head. Since the screw holes of the two adjacent lugs on the top surface of the cylinder head body 1 are close to a straight line seal, they hardly cross the arc section, and each The strength of the force part is uniform, which can ensure that the gasket is evenly deformed under pressure, thereby effectively improving the sealing effect.

Claims (2)

1. general gasoline engines cylinder head, has cylinder head body (1), the end face of this cylinder head body (1) is trapezoidal ring structure, and pass through arc transition between the trapezoidal adjacent edge, right part in outer, cylinder head body (1) end face front is provided with first journal stirrup (1a), the outer, back of cylinder head body (1) end face is provided with second journal stirrup (1b), the outer of cylinder head body (1) the end face left side and front connecting place is provided with the 3rd journal stirrup (1c), the rear portion of outer, cylinder head body (1) end face the right is provided with the 4th journal stirrup (1d), all have screw (1f) on each journal stirrup of described cylinder head body (1), it is characterized in that: described second journal stirrup (1b) is positioned at the right part of outer, cylinder head body (1) end face back, rear end in outer, described cylinder head body (1) the end face left side is provided with the 5th journal stirrup (1e), also has screw (1f) on the 5th journal stirrup (1e).

2. general gasoline engines cylinder head according to claim 1 is characterized in that: described journal stirrup (1a, 1b, 1c, 1d, 1e) is an overall structure with cylinder head body (1).

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