Crankcase air guide structure

Abstract

The utility model discloses a crankcase air guide structure which comprises a crankcase body and a crankcase cover, a crankcase cylinder neck is arranged on the upper portion of the crankcase body, cylinder neck air guide plates are arranged on the upper side and the lower side of the crankcase cylinder neck respectively, and crankcase cover air guide plates extend out of the crankcase cover towards the direction of the crankcase cylinder neck. And the crankcase cover air guide plate and the cylinder neck air guide plate are in contact to define a main cooling air duct. The crankcase cover has the advantages that the air deflector of the crankcase cover and the crankcase cylinder neck are closed to form a main cooling air channel of the crankcase cylinder neck, the running distance of cooling air at the position of the crankcase cylinder neck is increased, the total standing time of the cooling air at the crankcase cylinder neck is prolonged, heat dissipation of the crankcase cylinder neck is facilitated, and the service life of the crankcase cylinder neck is prolonged. Therefore, the cylinder neck of the crankcase can be cooled more sufficiently. And meanwhile, the bent structure reserved on the air deflector of the crankcase cover reserves an interface for a subsequent application terminal, so that the universality of the engine is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of general gasoline engines, in particular to a crankcase air guide structure. Background Art

[0002] Universal gasoline engines are easy to use and have a wide range of applications. Therefore, they have a wide range of applications. During the use of universal gasoline engines, the engine will generate heat. In order to ensure the normal operation of the universal gasoline engine and increase its service life, it is essential to help the engine dissipate heat.

[0003] The engine includes a crankcase body and a crankcase cylinder neck. A crankcase cover is installed on the crankcase body. The crankcase cover usually has the function of combining with the crankcase body, wrapping the moving mechanism, and combining with the user terminal. It has a single function and basically does not involve the engine cooling air guidance, and cannot help the engine crankcase cylinder neck dissipate heat. Utility Model Content

[0004] The utility model aims to provide a crankcase air guiding structure, which can increase the running distance of cooling air at the crankcase cylinder neck, prolong the total residence time of cooling air at the crankcase cylinder neck, and help the crankcase cylinder neck to dissipate heat.

[0005] A crankcase air guide structure comprises a crankcase body and a crankcase cover, wherein the upper portion of the crankcase body is a crankcase cylinder neck, and cylinder neck air guide plates are arranged on the upper and lower sides of the crankcase cylinder neck, and the crankcase cover extends a crankcase cover air guide plate toward the crankcase cylinder neck, and the crankcase cover air guide plate and the cylinder neck air guide plate are in contact with each other to form a main cooling air duct.

[0006] The crankcase cover air guide plate and the cylinder neck air guide plate are closed to form the main cooling air duct, which increases the running distance of the cooling air at the crankcase cylinder neck, prolongs the total residence time of the cooling air at the crankcase cylinder neck, helps the crankcase cylinder neck to dissipate heat, and thus allows the crankcase cylinder neck to be more fully cooled.

[0007] Furthermore, a portion of the crankcase cover air guide plate close to the crankcase cylinder neck is turned outward to form an air guide expansion interface with the crankcase cylinder neck.

[0008] The air guide expansion interface reserves an interface for subsequent application terminals, increasing the versatility of the engine.

[0009] Furthermore, an extended mounting column assembly is provided on the outer side of the crankcase cover air guide plate.

[0010] Furthermore, the extended mounting column combination includes a first extended mounting column and a second extended mounting column, the first extended mounting column is located at the center connection between the crankcase cover air guide plate and the crankcase cover, and the number of the second extended mounting columns is two, which are respectively located at both ends of the crankcase cover air guide plate close to the crankcase cylinder neck end face.

[0011] The first expansion mounting column and the second expansion mounting column reserve expansion connection positions for various terminals in the future.

[0012] Furthermore, the first extended mounting column and the two second extended mounting columns are arranged in a triangle.

[0013] Furthermore, threaded mounting holes are provided along the center lines of the first extended mounting column and the second extended mounting column.

[0014] Beneficial effect: The crankcase cover air guide plate of the utility model is closed with the crankcase cylinder neck to form the main cooling air duct of the crankcase cylinder neck, which increases the running distance of the cooling air at the crankcase cylinder neck, prolongs the total residence time of the cooling air at the crankcase cylinder neck, helps the crankcase cylinder neck to dissipate heat, and thus makes the crankcase cylinder neck more fully cooled. At the same time, the air guide expansion interface reserves an interface for subsequent application terminals, which increases the versatility of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the engine;

[0016] Figure 2 It is a schematic diagram of the engine plane;

[0017] Figure 3 for Figure 2 Sectional view at AA;

[0018] Figure 4 for Figure 3 Partial enlargement. DETAILED DESCRIPTION

[0019] The specific implementation manner and working principle of the utility model are further described in detail below with reference to the accompanying drawings.

[0020] like Figure 1-Figure 4 As shown, a crankcase air guide structure includes a crankcase body 1 and a crankcase cover 3, the upper part of the crankcase body 1 is a crankcase cylinder neck 2, and the upper and lower sides of the crankcase cylinder neck 2 are provided with cylinder neck air guide plates 21, the crankcase cover 3 is installed on the crankcase body 1, and the crankcase cover 3 extends a crankcase cover air guide plate 31 toward the crankcase cylinder neck 2, and the crankcase cover air guide plate 31 is in contact with the cylinder neck air guide plate 21 to enclose a main cooling air duct 4, and when the cooling air flows through the main cooling air duct 4, it can take away the heat of the crankcase cylinder neck 2 and help the crankcase cylinder neck 2 to dissipate heat.

[0021] The crankcase cover air guide plate 31 is partially turned outward near the crankcase cylinder neck 2 to form an air guide expansion interface 311 with the crankcase cylinder neck 2, reserving an interface for subsequent application terminals to facilitate the connection of the crankcase cylinder neck 2 with subsequent terminals.

[0022] The crankcase cover air guide plate 31 is provided with an extended mounting column combination arranged in a triangular shape, and the extended mounting column combination includes a first extended mounting column 312 and two second extended mounting columns 313, wherein the first extended mounting column 312 is located at the center of the connection between the crankcase cover air guide plate 31 and the crankcase cover 3; the two second extended mounting columns 313 are respectively located at both ends of the crankcase cover air guide plate 31 close to the end surface of the crankcase cylinder neck 2.

[0023] The first expansion mounting column 312 and the second expansion mounting column 313 are both provided with threaded mounting holes along the column center lines, so as to facilitate expansion and connection with various terminals.

Claims

1. A crankcase air guide structure, comprising a crankcase body (1) and a crankcase cover (3), wherein the upper portion of the crankcase body (1) is a crankcase cylinder neck (2), and cylinder neck air guide plates (21) are provided on both upper and lower sides of the crankcase cylinder neck (2), characterized in that: The crankcase cover (3) extends a crankcase cover air guide plate (31) in the direction of the crankcase cylinder neck (2), and the crankcase cover air guide plate (31) and the cylinder neck air guide plate (21) are in contact with each other to enclose a main cooling air duct (4).

2. The crankcase air guide structure according to claim 1, characterized in that The crankcase cover air guide plate (31) is partially turned outward near the crankcase cylinder neck (2), forming an air guide expansion interface (311) with the crankcase cylinder neck (2).

3. A crankcase air guide structure according to claim 1 or 2, characterized in that: An expansion mounting column assembly is arranged on the outer side surface of the crankcase cover air guide plate (31).

4. The crankcase air guide structure according to claim 3, characterized in that: The extended mounting column assembly comprises a first extended mounting column (312) and a second extended mounting column (313), wherein the first extended mounting column (312) is located at the central connection between the crankcase cover air guide plate (31) and the crankcase cover (3), and the second extended mounting column (313) is two in number and is respectively located at both ends of the crankcase cover air guide plate (31) close to the end surface of the crankcase cylinder neck (2).

5. The crankcase air guide structure according to claim 4, characterized in that: The first extended installation column (312) and the two second extended installation columns (313) are arranged in a triangle.

6. The crankcase air guide structure according to claim 4, characterized in that: The first extended mounting column (312) and the second extended mounting column (313) are both provided with threaded mounting holes along the column center lines.

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