A unit motor engine cylinder head

Abstract

The utility model relates to motorcycle engine technical field discloses a whole type motorcycle engine cylinder head, including cylinder head body, fin, air duct, camshaft support and cylinder head cover, the cylinder head body top sets up cylinder head cover, camshaft support sets up in cylinder head cover, its characterized in that, cylinder head body, camshaft support and cylinder head cover are integral type structure, and the cylinder head cover includes rocker arm movable cavity and sprocket cavity. Have the advantages such as high rigidity and strength, small noise, no leakage risk.

Description

Technical Field

[0001] This utility model relates to the field of motorcycle engine technology, specifically to an integral motorcycle engine cylinder head. Background Technology

[0002] The cylinder head of a motorcycle engine, together with the piston crown, forms a sealed combustion chamber. This sealed space must be able to withstand the high temperature and pressure generated during fuel combustion, ensuring that the energy from the combustion is fully used to drive the piston and does work, rather than leaking out. Currently, the market demand for high-power, high-revving motorcycles is increasing, which places more stringent requirements on engine design. When a motorcycle engine is running, a large amount of heat is released due to the combustion of the air-fuel mixture in the cylinder, of which about one-third is transferred to the cooling system through parts in contact with the hot combustion gases.

[0003] Chinese patent document CN221942580U discloses a motorcycle engine cylinder head, including a cylinder head body. The cylinder head body is provided with an intake manifold, an exhaust manifold, a spark plug mounting cavity, and a timing chain cavity. A heat sink assembly is provided on the outer side of the cylinder head body. The spark plug mounting cavity and the exhaust manifold are located on adjacent sides of the cylinder head body. A cooling air duct is provided inside the cylinder head body. The air inlet of the cooling air duct is located on the side of the exhaust manifold near the timing chain cavity. The cooling air duct passes sequentially through the area between the exhaust manifold and the timing chain cavity, and between the exhaust manifold and the intake manifold. The air outlet of the cooling air duct is connected to the spark plug mounting cavity. A partition rib for diverting cooling airflow is provided in the cooling air duct between the intake manifold and the exhaust manifold. The patent document describes a cam support on the cylinder head body, and a cylinder head cover that can be detachably mounted on the cam support. For example, patent document CN206874376U discloses an air-cooled heat dissipation system and a horizontal engine, which involves a cylinder head cover. A cylinder head is provided between the cylinder block and the cylinder head cover. The end faces of the cylinder head and the cylinder head cover are provided with heat-conducting surfaces, and heat conduction between the cylinder head and the cylinder head cover is achieved through surface contact between the heat-conducting surfaces.

[0004] The existing technology has the following shortcomings: since the cylinder head cover, cylinder head, and camshaft support are separate structures, there is a risk of leakage at the joint surface between the cover and the cylinder head, and multiple parts are connected by bolts, resulting in high vibration and low strength under high engine load and high heat conditions. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides an integral motorcycle engine cylinder head, including a cylinder head body, a heat sink, an air duct, a camshaft bracket, and a cylinder head cover. The cylinder head cover is disposed on the top of the cylinder head body, and the camshaft bracket is disposed inside the cylinder head cover. The cylinder head body, camshaft bracket, and cylinder head cover are integral structures, and the cylinder head cover includes a rocker arm movable cavity and a sprocket cavity.

[0006] Preferably, the top of both the rocker arm movable cavity and the sprocket cavity has an arc-shaped structure, and multiple reinforcing ribs are provided on the top.

[0007] To facilitate connection and fixation of the rocker arm and prevent movement, the camshaft bracket includes a longitudinal rocker arm fixing screw hole and a transverse rocker arm fixing screw hole. The longitudinal rocker arm fixing screw hole and the transverse rocker arm fixing screw hole are interconnected for bolt connection and fixing of the rocker arm.

[0008] Preferably, the longitudinal rocker arm fixing screw hole passes through the cylinder head cover between the rocker arm movable cavity and the sprocket cavity.

[0009] To facilitate fixing the cylinder head to the engine block, the cylinder head cover is provided with multiple bolt holes around its perimeter for bolting to the engine block.

[0010] To facilitate heat dissipation, the air-facing side of the cylinder head cover is provided with multiple layers of cylinder head cover heat dissipation fins.

[0011] For ease of operation and observation, the cylinder head cover is provided with a valve viewing hole, which is convex and has internal threads for connecting the valve cover.

[0012] To improve heat dissipation, the air duct is provided with dividing vertical ribs, which are supported at the top and bottom of the air duct. The air inlet side of the air duct is provided with air guide vertical ribs, which are directly connected to the cylinder head body.

[0013] Preferably, the cylinder head body is surrounded by multiple layers of heat sinks, and the heat sinks on both sides of the air inlet of the air duct have a stepped structure with smaller upper parts and larger lower parts.

[0014] This utility model has the following beneficial effects: 1. The integral cylinder head of this utility model integrates the camshaft, cylinder head cover, support ribs and heat sink into one piece, which greatly avoids the risk of leakage at the joint surface between the cylinder head cover and the cylinder head, eliminates the joint surface, and forms an extremely robust "box" structure. While improving rigidity and strength, it ensures the permanent coaxiality of the internal holes. The geometric relationship between the camshaft and the valve remains absolutely stable under any operating conditions, which is particularly beneficial for improving the engine's maximum speed and precise valve control. It can also effectively avoid the separate design and development of parts such as the camshaft bracket and cylinder head cover.

[0015] 2. By eliminating connecting bolts, flanges, and some sealing gaskets, the structure is more efficient and reduces vibration and noise caused by more parts and seams during engine operation. It can reduce weight and size while ensuring higher rigidity, which meets the design goals of high-performance engines. Attached Figure Description

[0016] Figure 1This is a schematic diagram of an embodiment of the integral motorcycle engine cylinder head of this utility model; Figure 2 for Figure 1 Top view; Figure 3 for Figure 2 AA section view in the middle; Figure 4 for Figure 1 The left view; Figure 5 This is a schematic diagram of the air duct structure; Figure 6 for Figure 1 Top view; Figure 7 for Figure 6 Sectional view of BB (British Biological Engineering). Detailed Implementation

[0017] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: cylinder head body 1, heat sink 2, air duct 3, air inlet 301, air outlet 302, dividing vertical rib 304, camshaft bracket 4, cylinder head cover 5, rocker arm movable cavity 6, sprocket cavity 7, reinforcing rib 8, longitudinal rocker arm fixing screw hole 9, transverse rocker arm fixing screw hole 10, support rib 11, bolt hole 12, cylinder head cover heat sink 13, valve viewing hole 14, connecting vertical rib 15, air guide vertical rib 16.

[0018] Example 1 like Figure 1-7 As shown, an integral motorcycle engine cylinder head includes a cylinder head body 1, a heat sink 2, an air duct 3, a camshaft bracket 4, and a cylinder head cover 5. The cylinder head cover 5 is mounted on the top of the cylinder head body 1, and the camshaft bracket 4 is disposed inside the cylinder head cover 5. The cylinder head body 1, the camshaft bracket 4, and the cylinder head cover 5 are an integral structure. The cylinder head cover 5 includes a rocker arm movable cavity 6 and a sprocket cavity 7.

[0019] The tops of both the rocker arm movable cavity 6 and the sprocket cavity 7 are arc-shaped, and multiple reinforcing ribs 8 are arranged in parallel on the top.

[0020] The camshaft bracket 4 includes a longitudinal rocker arm fixing screw hole 9 and a transverse rocker arm fixing screw hole 10. The longitudinal rocker arm fixing screw hole 9 and the transverse rocker arm fixing screw hole 10 are perpendicularly connected to each other for bolt connection and fixing of the rocker arm. The camshaft bracket 4 also includes multiple support ribs 11, which reinforce the transverse rocker arm fixing screw hole 10.

[0021] The longitudinal rocker arm fixing screw hole 9 passes through the cylinder head cover 5 between the rocker arm movable cavity 6 and the sprocket cavity 7.

[0022] The cylinder head cover 5 has four bolt holes 12 around its perimeter for bolting the engine block.

[0023] The cylinder head cover 5 has three layers of heat sink 13 on its windward side, and the air inlet 301 of the air duct 3 is on the windward side.

[0024] The cylinder head cover 5 is provided with two valve viewing holes 14 on the left and right sides. The valve viewing holes 14 protrude outward and are provided with internal threads for connecting the valve viewing cover.

[0025] The air duct 3 is provided with dividing vertical ribs 304, which support the top and bottom of the air duct 3. A guide rib 16 is provided on one side of the air inlet 301 of the air duct 3, and the guide rib 16 is directly connected to the cylinder head body 1. The guide rib 16 and the outer wall of the air duct 3 together form a guide corridor for the air duct 3. This design facilitates the smoother guidance of cooling air to the outer wall of the air duct 3, improving the cooling effect of the air duct and reducing the cylinder head temperature.

[0026] The cylinder head body 1 is surrounded by six layers of heat sink 2. The air outlets 302 of the air duct 3, from the bottom up, are distributed on the left and right sides in a stepped structure with the top smaller than the bottom. The heat sink 2 is connected by connecting vertical ribs 15 on the left and right sides, and the connecting vertical ribs 15 are disconnected from the cylinder head body 1. This design facilitates the smoother flow of cooling air out of the air duct 3 and distributes it to the intake and exhaust sides, improving the cooling effect of the cylinder head body. The stepped design of the heat sink 2 also makes the cylinder head look more natural.

[0027] The above descriptions are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are knowledgeable of all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Therefore, those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in conjunction with their own capabilities. Typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An integral motorcycle engine cylinder head, comprising a cylinder head body, heat sink, air duct, camshaft bracket, and cylinder head cover, wherein the cylinder head cover is disposed on the top of the cylinder head body, and the camshaft bracket is disposed within the cylinder head cover, characterized in that, The cylinder head body, camshaft bracket and cylinder head cover are an integral structure, and the cylinder head cover includes a rocker arm movable cavity and a sprocket cavity.

2. The integral motorcycle engine cylinder head according to claim 1, characterized in that: The top of both the rocker arm movable cavity and the sprocket cavity has an arc-shaped structure, and multiple reinforcing ribs are provided on the top.

3. The integral motorcycle engine cylinder head according to claim 2, characterized in that: The camshaft bracket includes a longitudinal rocker arm fixing screw hole and a transverse rocker arm fixing screw hole, which are interconnected for bolt connection to fix the rocker arm.

4. The integral motorcycle engine cylinder head according to claim 3, characterized in that: The longitudinal rocker arm fixing screw hole passes through the cylinder head cover between the rocker arm movable cavity and the sprocket cavity.

5. The integral motorcycle engine cylinder head according to claim 4, characterized in that: The cylinder head cover is provided with multiple bolt holes around its perimeter for bolting to the engine block.

6. The integral motorcycle engine cylinder head according to claim 5, characterized in that: The cylinder head cover has multiple layers of heat dissipation fins on its windward side.

7. The integral motorcycle engine cylinder head according to claim 6, characterized in that: The cylinder head cover is provided with a valve sight hole, which protrudes outward and has internal threads for connecting the valve sight cover.

8. The integral motorcycle engine cylinder head according to claim 7, characterized in that: The air duct is provided with dividing vertical ribs, which are supported at the top and bottom of the air duct. The air inlet side of the air duct is provided with air guide vertical ribs, which are directly connected to the cylinder head body.

9. The integral motorcycle engine cylinder head according to claim 8, characterized in that: The cylinder head body is surrounded by multiple layers of heat sinks, and the heat sinks on both sides of the air inlet of the air duct have a stepped structure with smaller upper parts and larger lower parts.

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