Heat dissipation structure of motorcycle engine

Abstract

The utility model provides a heat dissipation structure of a motorcycle engine, and belongs to the technical field of motorcycles. The problem that an existing motorcycle engine is poor in heat dissipation stability is solved. The heat dissipation structure of the motorcycle engine comprises a cylinder body, a cylinder cover located at the top of the cylinder body and a main shaft arranged in the cylinder body, a plurality of heat dissipation fins are arranged on the cylinder body and the cylinder cover, one end of the main shaft extends out of the cylinder body and is connected with fan blades, a wind scooper is further arranged on the cylinder body, an air channel is formed between the wind scooper and the cylinder body, and the air channel is communicated with the air channel. And the fan blades and the radiating fins on the cylinder body are positioned in the air duct. The heat dissipation device is simple in structure and ingenious in design, the main shaft is used for driving the fan blades to dissipate heat of the cylinder body, the cylinder cover dissipates heat of the heat dissipation fins through natural wind, cost is lower, heat dissipation is more stable, and the heat dissipation effect is better.

Description

Technical Field

[0001] The utility model belongs to the technical field of motorcycles and relates to a heat dissipation structure of a motorcycle engine. Background Art

[0002] Motorcycles are a common mode of transportation, widely used in our daily lives. Because motorcycle engines are internal combustion engines that continuously burn gasoline to generate power, if engine heat is not promptly dissipated, the engine temperature will gradually rise to over 200-300°C, shortening the engine's service life and easily causing burns to the rider.

[0003] In order to cool the engine, there are currently two common practices. One is to set a heat sink on the engine, and the other is to set a fan for cooling. However, relying solely on heat sinks to dissipate heat is generally ineffective, and the engine temperature is still high. As for heat dissipation through fans, most existing fans are similar to a motorcycle engine cooling fan disclosed in a patent application (application number: 202322654304.7), which includes a motor, an impeller, and a wind shield. The impeller is driven by a motor to rotate for heat dissipation. However, this structure is relatively complex, there is a lot of dust in the air during driving, and it is often necessary to work in the rain. The working environment of the motor is relatively harsh, the failure rate is high, the service life is short, and higher waterproof and dustproof requirements are required, resulting in higher production costs. Summary of the Invention

[0004] The purpose of this utility model is to solve the above problems in the existing technology and propose a heat dissipation structure for a motorcycle engine. The technical problem to be solved by this utility model is: how to make the heat dissipation effect of the motorcycle engine better and more stable.

[0005] The purpose of the utility model can be achieved through the following technical solutions: A heat dissipation structure of a motorcycle engine, comprising a cylinder body, a cylinder head located on the top of the cylinder body and a main shaft arranged in the cylinder body, characterized in that the cylinder body and the cylinder head are provided with a plurality of heat dissipation fins, one end of the main shaft extends out of the cylinder body and is connected to a fan blade, and the cylinder body is also provided with an air guide cover, an air duct is formed between the air guide cover and the cylinder body, and the fan blades and the heat dissipation fins on the cylinder body are both located in the air duct.

[0006] The utility model provides fan blades on the cylinder body, and the fan blades are directly connected to the main shaft within the cylinder body. This allows the main shaft of the engine to simultaneously drive the fan blades to rotate while outputting power for the motorcycle's travel. Heat is dissipated to the cooling fins on the cylinder body through the air duct. Simultaneously, the cylinder head dissipates heat directly through contact with natural wind through the cooling fins, reducing the heat dissipation pressure on the fan blades. Because the fan blades in the utility model are directly powered by the main shaft, the motor and related electronic control structures are eliminated, resulting in a simpler structure, lower costs, and more stable and reliable operation. Furthermore, the cylinder head and cylinder body dissipate heat independently, allowing the air guide cover to only cover the cylinder body, while the cylinder head is directly exposed to the outside, making it easier to disassemble and install the cylinder head during later maintenance.

[0007] In the heat dissipation structure of the motorcycle engine, the fan blades are located at the air inlet of the air duct, and the heat dissipation fins on the cylinder body are located at the air outlet of the air duct. In this way, the airflow generated by the fan blades can better dissipate heat from the heat dissipation fins on the cylinder body.

[0008] In the heat dissipation structure of the aforementioned motorcycle engine, the air shroud includes an upper shroud, a lower shroud, a front shroud, and a rear shroud. The upper and lower shrouds are located on the same side of the cylinder body, with the lower shroud located below the upper shroud. The upper and lower shrouds together form a cavity for accommodating fan blades. A gap is defined between the lower shroud and the sidewall of the cylinder body, forming an air inlet for the air duct. The front shroud and rear shroud are located at the front and rear sides of the cylinder body, respectively. The front, rear, and upper shrouds are all disposed around the cooling fins of the cylinder body, and an air outlet for the air duct is formed between the front and rear shrouds. The air shroud is composed of multiple components, making it easy to manufacture and install, and to form an air duct with the cylinder body.

[0009] In the heat dissipation structure of the motorcycle engine, the air inlet is located on the lower side of the cylinder body and on the inner side of the lower cover, so that rainwater is not easy to enter the air inlet.

[0010] In the heat dissipation structure of the motorcycle engine described above, the heat dissipation fins on the cylinder body are all arranged transversely and spaced apart along the height direction of the cylinder body.

[0011] In the aforementioned motorcycle engine heat dissipation structure, the cooling fins on the cylinder head are vertically arranged, extending in the front-to-back direction of the cylinder head and spaced apart in the left-to-right direction. This allows air to flow through the gaps between the fins along their length during operation, ensuring sufficient contact between the fins and the air for heat dissipation.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. The fan blades of the utility model are directly connected to the main shaft of the engine and are powered by the main shaft. The structure is simple, the operation is stable and reliable, the cost is lower, and the subsequent maintenance is also simpler.

[0014] 2. The utility model provides heat dissipation fins on both the cylinder body and the cylinder head. The heat generated on the cylinder body is relatively large, and the heat dissipation is carried out by the heat dissipation fins through the fan blades. The heat on the cylinder head is relatively small, and the heat dissipation fins dissipate heat through natural wind. The layout is more scientific and reasonable, and the heat dissipation effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 It is a structural explosion diagram of the utility model;

[0017] Figure 3 It is a structural schematic diagram of the utility model from another perspective;

[0018] Figure 4 yes Figure 3 A partial enlarged view of part A in the middle.

[0019] In the figure, 11, cylinder body; 12, cylinder head; 13, cooling fins; 2, fan blades; 3, air guide cover; 31, upper cover; 32, lower cover; 33, front cover; 34, rear cover; 41, air inlet; 42, air outlet. DETAILED DESCRIPTION

[0020] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0021] A heat dissipation structure of a motorcycle engine, such as Figure 1 、 Figure 2 As shown, it includes a cylinder body 11, a cylinder head 12, fan blades 2 and an air guide cover 3, wherein a main shaft is provided in the cylinder body 11, one end of the main shaft extends from one side of the cylinder body 11 and is connected to the fan blades 2, and a plurality of heat dissipation fins 13 are provided on the cylinder body 11 and the cylinder head 12 located on the top of the cylinder body 11. The air guide cover 3 is fixed to the outside of the cylinder body 11 and covers the fan blades 2 and the heat dissipation fins 13 on the cylinder body 11, so that an air duct is formed between the air guide cover 3 and the cylinder body 11.

[0022] Specifically, such as Figures 2-4As shown, the neck of the cylinder 11, that is, the outer surface of the combustion chamber, is provided with a plurality of heat dissipation fins 13. The heat dissipation fins 13 are all arranged horizontally and spaced apart along the height direction of the cylinder 11. The air guide hood 3 includes an upper hood 31, a lower hood 32, a front hood 33 and a rear hood 34. The upper hood 31 and the lower hood 32 are both fixed to the side of the cylinder 11 where the fan blades 2 are provided, and the lower hood 32 is located below the upper hood 31. The upper hood 31 and the lower hood 32 together form a cavity for accommodating the fan blades 2. At the same time, there is a certain gap between the lower hood 32 and the cylinder 11, forming an air inlet 41 of the air duct. The air inlet 41 is located on the lower side of the cylinder 11 and Located on the inner side of the lower cover 32, it prevents rainwater from entering the air duct; the front cover 33 and the rear cover 34 are respectively fixed to the front and rear sides of the cylinder 11, and the front cover 33, the rear cover 34 and the upper cover 31 are all distributed around the heat dissipation fins 13 of the cylinder 11, so that the heat dissipation fins 13 are located in the air duct and at the air outlet 42 of the air duct, so that the air flow formed by the fan blades 2 passes through the heat dissipation fins 13 and then flows out of the air duct, ensuring that the heat dissipation fins 13 are in full contact with the air flow, thereby improving the heat dissipation efficiency. In this embodiment, the air outlet 42 is located on the other side of the cylinder 11 opposite to the air inlet 41. The air outlet 42 is located on the side of the cylinder 11. According to Bernoulli's principle, when the motorcycle is running, the air outlet 42 can discharge air more smoothly and achieve better heat dissipation effect.

[0023] Further, such as Figure 1 As shown, the air guide cover 3 is located below the cylinder head 12, so that the cylinder head 12 is exposed above the cylinder body 11, and the heat dissipation fins 13 on the cylinder head 12 are all vertically arranged. The heat dissipation fins 13 extend along the front and rear directions of the cylinder head 12 and are spaced apart along the left and right directions of the cylinder head 12, that is, the direction of the heat dissipation fins 13 is consistent with the driving direction of the motorcycle, so that the air flow can flow through the heat dissipation fins 13 and fully contact them to dissipate heat.

[0024] The working principle of this utility model is as follows: when the engine is operating, the cylinder body 11, which generates a relatively high amount of heat, is cooled by the airflow generated by the fan blades 2 driven by the main shaft through the air duct to the cooling fins 13 of the cylinder body 11; while the cylinder head 12, which generates a relatively low amount of heat, is cooled by contact with the outside air during driving through the cooling fins 13. This effectively dissipates heat from the engine, has a simple structure, stable operation, and is easier and more convenient to maintain later.

[0025] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0026] Although this document frequently uses terms such as cylinder body 11, cylinder head 12, heat dissipating fins 13, fan blades 2, and air guide hood 3, the use of other terms is not excluded. These terms are used solely to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A heat dissipation structure for a motorcycle engine, comprising a cylinder block (11), a cylinder head (12) located on the top of the cylinder block (11), and a main shaft arranged in the cylinder block (11), characterized in that: The cylinder body (11) and the cylinder cover (12) are both provided with a plurality of heat dissipation fins (13); one end of the main shaft extends out of the cylinder body (11) and is connected to a fan blade (2); an air guide cover (3) is also provided on the cylinder body (11); an air duct is formed between the air guide cover (3) and the cylinder body (11); and the fan blade (2) and the heat dissipation fins (13) on the cylinder body (11) are both located in the air duct.

2. The heat dissipation structure of a motorcycle engine according to claim 1, characterized in that: The fan blades (2) are located at the air inlet (41) of the air duct, and the heat dissipation fins (13) on the cylinder body (11) are located at the air outlet (42) of the air duct.

3. The heat dissipation structure of a motorcycle engine according to claim 2, characterized in that: The air guide cover (3) comprises an upper cover (31), a lower cover (32), a front cover (33) and a rear cover (34); the upper cover (31) and the lower cover (32) are both located on the same side of the cylinder (11), and the lower cover (32) is located below the upper cover (31); the upper cover (31) and the lower cover (32) together form a cavity for accommodating the fan blades (2); the lower cover (32) and the cylinder There is a gap between the side walls of the cylinder (11) and an air inlet (41) of the air duct is formed. The front cover (33) and the rear cover (34) are respectively located on the front side and the rear side of the cylinder (11). The front cover (33), the rear cover (34) and the upper cover (31) are all arranged around the heat dissipation fins (13) of the cylinder (11), and an air outlet (42) of the air duct is formed between the front cover (33) and the rear cover (34).

4. The heat dissipation structure of a motorcycle engine according to claim 3, characterized in that: The air inlet (41) is located on the lower side of the cylinder body (11) and on the inner side of the lower cover (32).

5. The heat dissipation structure of a motorcycle engine according to claim 1 or 2, characterized in that: The heat dissipation fins (13) on the cylinder body (11) are all arranged in a transverse direction and are distributed at intervals along the height direction of the cylinder body (11).

6. The heat dissipation structure of a motorcycle engine according to claim 1 or 2, characterized in that: The heat dissipation fins (13) on the cylinder cover (12) are all arranged vertically, and the heat dissipation fins (13) on the cylinder cover (12) extend along the front-rear direction of the cylinder cover (12) and are spaced apart along the left-right direction of the cylinder cover (12).

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