Engine and motorcycle

Abstract

The utility model relates to the field of engine, disclose a kind of engine and motorcycle, including cylinder head, wind deflector, further including the wind deflector sealing strip of being arranged between cylinder head and wind deflector, at least two sub-positioning structures are equipped on the wind deflector sealing strip, main positioning structure is equipped in cooperation and connection with sub-positioning structure on the cylinder head, and the cylinder head is irregular shape. This structure sealing strip is designed according to structure arrangement, compact structure, low in cost, assembly process is good, and sealing effect is good, the engine of using this structure forced air cooling sealing effect is good, and the motorcycle of using this engine driving performance is good.

Description

Technical Field

[0001] This utility model relates to the field of engines, specifically to an engine and a motorcycle. Background Technology

[0002] Existing forced air-cooled engines form an air-cooling channel between the air shroud and the cylinder head. When designing the sealing structure of the air shroud and cylinder head, the sealing groove of the air shroud and the shape of the cylinder head are often designed with regular shapes to facilitate the sealing structure. This design causes the spark plugs to be placed outwards, resulting in a less compact structure, larger space occupation, material waste, and higher costs. Alternatively, considering space, the sealing groove of the air shroud and the shape of the cylinder head are designed to conform to the internal structure. Although this structure is compact, the irregular circumference of the sealing groove and the irregular shape of the sealing strip require assembly. The sealing strip is first glued to the sealing groove of the air shroud, and then, after the glue has cured, it is assembled onto the heat sink of the cylinder head. This structure has poor assembly processability, and due to the structural reasons, the sealing strip must have openings, resulting in poor sealing at the openings. Utility Model Content

[0003] The present invention aims to provide an engine that solves the problems of large space occupation and poor manufacturability of the existing forced air-cooled engine air duct sealing structure.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an engine, including a cylinder head, a wind deflector, and a wind deflector sealing strip disposed between the cylinder head and the wind deflector. The wind deflector sealing strip is provided with at least two secondary positioning structures, and the cylinder head is provided with a primary positioning structure that cooperates with and connects to the secondary positioning structures. The cylinder head has an irregular shape.

[0005] Preferably, as an improvement, the cylinder head is also provided with a spark plug mounting position, and the main positioning structure is located on both sides of the spark plug mounting position.

[0006] Preferably, as an improvement, the cylinder head is also provided with a heat sink, which is disconnected at the spark plug mounting position, and the main positioning structure is located at the disconnection point.

[0007] Preferably, as an improvement, the heat sink is designed to conform to the cylinder head structure.

[0008] Preferably, as an improvement, the air guide shroud is provided with a sealing groove, which, together with the air guide shroud sealing strip, achieves a seal between the air guide shroud and the cylinder head.

[0009] Preferably, as an improvement, the cylinder head is also provided with a cylinder head sealing ring located outside the spark plug, the cylinder head sealing ring is provided with a sealing rib, and the air guide shroud is provided with a boss that cooperates with the sealing rib at the break point of the air guide shroud sealing strip.

[0010] Preferably, as an improvement, the main positioning structure is a positioning boss, and the secondary positioning structure is a positioning hole.

[0011] Preferably, as an improvement, the sealing rib is integrally formed on the cylinder head sealing ring.

[0012] The principle and advantages of this solution are as follows: In practical applications, the shapes of the cylinder head and air guide shroud are designed to follow the internal structural layout, eliminating the need to move the spark plug mounting position outwards. The heat sink and air guide shroud sealing strip are designed to conform to the cylinder head structure, resulting in a compact structure. The air guide shroud sealing strip is positioned outside the spark plug mounting position via positioning holes at its ends and positioning bosses on the heat sink. The sealing groove provides installation space for the air guide shroud sealing strip, contributing to the overall compact structure. The break between the two ends of the air guide shroud sealing strip is sealed at the spark plug mounting position through the cooperation of the cylinder head sealing ring, sealing rib, boss, and spark plug cap, resulting in excellent overall sealing performance. The assembly process involves first assembling the cylinder head and cylinder head seals, then aligning the positioning holes of the air guide shroud sealing strip with the positioning bosses of the radiator fins to ensure proper installation. Next, aligning the sealing grooves of the air guide shroud with the radiator fins, and finally assembling the air guide shroud onto the cylinder head. Finally, the spark plug caps are installed into their corresponding holes. This assembly process is more efficient, ensures the air guide shroud sealing strip is stable and less prone to detachment after assembly, facilitates operation, improves subsequent maintenance, enhances manufacturability, provides reliable sealing after assembly, and reduces costs. This type of engine utilizes forced air cooling technology, resulting in excellent sealing of the air guide shroud and cylinder head, a compact overall structure, minimal space occupation, and low cost.

[0013] A motorcycle that uses any of the engines described above.

[0014] Such motorcycle engines have a compact structure, good air cooling, and better motorcycle performance. Attached Figure Description

[0015] Figure 1 This is a front view of Embodiment 1 of this utility model.

[0016] Figure 2 This is a cross-sectional view of Embodiment 1 of the present utility model.

[0017] Figure 3 for Figure 1 Sectional view of AA.

[0018] Figure 4 for Figure 1 CC section view. Detailed Implementation

[0019] The following detailed description illustrates the specific implementation method:

[0020] The reference numerals in the accompanying drawings include: cylinder head 1, air guide shroud 2, cylinder head sealing ring 3, sealing rib 4, spark plug cap 5, air guide shroud sealing strip 6, sealing groove 7, boss 8, heat sink 9, positioning hole 10, positioning boss 11.

[0021] Example 1, basically as shown in the attached document. Figure 1 The image shows an engine comprising a cylinder head 1 and a draft shroud 2 mounted on the cylinder head 1. The cylinder head 1 and the draft shroud 2 are both designed to conform to their internal structural layout. In this embodiment, the main improvement is in the sealing structure between the cylinder head and the draft shroud. Other structural features of the engine are well-known to those skilled in the art and will not be described in detail here. Figure 2 , Figure 3 As shown, the cylinder head 1 is provided with a heat sink 9, a cylinder head sealing ring 3, and a spark plug mounting hole. A spark plug cap 5 is installed in the spark plug mounting hole. The portion of the cylinder head sealing ring 3 located outside the spark plug mounting hole has an integrally formed sealing rib 4. The heat sink 9 is designed to conform to the structure of the cylinder head 1. The heat sink 9 is broken at the spark plug mounting hole, and a positioning boss 11 is integrally formed on each side of the heat sink 9 at the break position. An air guide shroud sealing strip 6 is installed between the cylinder head 1 and the air guide shroud 2. The shape of the air guide shroud sealing strip 6 is designed according to the shape of the heat sink 9. The cross-sectional shape of the air guide shroud sealing strip 6 is U-shaped, so that the air guide shroud sealing strip 6 can be fitted onto the heat sink 9. The air guide shroud 2 is provided with a sealing groove 7 to accommodate the air guide shroud sealing strip 6. The sealing groove 7, together with the air guide shroud sealing strip 6, achieves a seal between the air guide shroud sealing strip 6 and the cylinder head 1. Positioning holes 10 are provided at both ends of the air guide cover sealing strip 6, corresponding to the positioning bosses 11. The positioning holes 10 fit onto the positioning bosses 11 to position both ends of the air guide cover sealing strip 6. Figure 4 As shown, the air guide shroud 2 has a boss 8 at the break point between the two ends of the air guide shroud sealing strip 6. The length of the boss 8 is greater than the distance between the two ends of the air guide shroud sealing strip 6. The boss 8 abuts against the sealing rib 4. The cylinder head sealing ring 3, the sealing rib 4, and the spark plug cap 5 work together to achieve the sealing at the break point of the air guide shroud sealing strip 6.

[0022] The specific implementation process is as follows: First, assemble the cylinder head and cylinder head sealing ring 3 into place. Then, align the positioning hole 10 of the air guide shroud sealing strip 6 with the positioning boss 11 of the cylinder head heat sink 9. Assemble the air guide shroud sealing strip 6 onto the heat sink 9. Next, align the sealing groove 7 of the air guide shroud 2 with the heat sink 9 with the air guide shroud sealing strip 6 and assemble it onto the cylinder head. Finally, assemble the spark plug cap 5 into the corresponding hole. This cylinder head 1 and air guide shroud 2 adopt a conformal design, eliminating the need for external spark plug relocation. The structure is compact. The air guide shroud sealing strip 6 and the heat sink 9 are installed using end positioning and a central clamping method. The ends of the air guide shroud sealing strip 6 at the spark plug mounting positions are sealed by the cylinder head sealing ring 3, sealing rib 4, and spark plug cap 5. The ends of the air guide shroud sealing strip 6 are positioned by the positioning boss 11, and the middle is positioned by the sealing groove 7. The positioning and assembly of the air guide shroud sealing strip 6 is stable and reliable, and it is not easy for the air guide shroud sealing strip 6 to fall off during use. The assembly process is more reasonable and easier to operate. The overall seal is stable and reliable, the cost of the entire sealing structure is lower than existing technologies, the assembly process is convenient and reasonable, and it facilitates subsequent maintenance operations.

[0023] Example 2: A motorcycle using an engine from Example 1. This engine employs forced air cooling, has good sealing of its air shroud and cylinder head, a compact overall structure, and occupies little space. Motorcycles using this engine have low cost and good driving performance.

[0024] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution 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 engine, comprising a cylinder head and a draft shroud, characterized in that: It also includes a guide shroud sealing strip disposed between the cylinder head and the guide shroud, the guide shroud sealing strip having at least two secondary positioning structures, the cylinder head having a primary positioning structure that cooperates with and connects to the secondary positioning structures, and the cylinder head having an irregular shape.

2. The engine according to claim 1, characterized in that: The cylinder head is also provided with a spark plug mounting position, and the main positioning structure is located on both sides of the spark plug mounting position.

3. The engine according to claim 2, characterized in that: The cylinder head is also provided with a heat sink, which is disconnected at the spark plug mounting position, and the main positioning structure is located at the disconnection point.

4. An engine according to claim 3, characterized in that: The heat sink is designed to conform to the cylinder head structure.

5. An engine according to claim 2, characterized in that: The air guide shroud is provided with a sealing groove, which, together with the air guide shroud sealing strip, achieves a seal between the air guide shroud and the cylinder head.

6. An engine according to claim 5, characterized in that: The cylinder head is also provided with a cylinder head sealing ring located outside the spark plug, the cylinder head sealing ring is provided with a sealing rib, and the air guide is provided with a boss that cooperates with the sealing rib.

7. An engine according to claim 6, characterized in that: The sealing rib is integrally formed on the cylinder head sealing ring.

8. An engine according to claim 1, characterized in that: The main positioning structure is a positioning boss, and the secondary positioning structure is a positioning hole.

9. A motorcycle, characterized in that: The engine described in any one of claims 1-8 is used.

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