Air-cooled engine body

Abstract

The utility model discloses an air-cooled engine body which comprises a base and a box body, the bottom face of the base extends downwards to form an air guide plate installation hole, the air guide plate installation hole is used for installing an air guide plate, the lower end of the air guide plate installation hole extends to the position below the base, and the base and the air guide plate form a cooling air channel. According to the engine base, the problems that an existing engine base is low in heat dissipation efficiency and affects engine oil cooling are solved, the air guide plate installation hole is formed in the base in a downward extending mode, the air guide plate is fixed to the lower end of the air guide plate installation hole, the air guide plate is fixed to the lower end of the air guide plate installation hole, and the air guide plate is fixed to the lower end of the air guide plate installation hole. A cooling air channel is formed between the base and the air deflector, airflow is introduced into the cooling air channel through the lower ventilation holes, the heat dissipation capacity of the base is improved, and the cooling speed of engine oil in the engine body is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to an air-cooled engine body. Background Art

[0002] An engine is a machine that can convert other forms of energy into mechanical energy. It consists of a cylinder, a crank-connecting rod mechanism, a valve mechanism, a starting system, a lubrication system, a cooling system, a fuel supply system and an ignition system.

[0003] Existing engines, including general-purpose engines, mostly adopt a forced air cooling method. Usually, the crankshaft drives the fan impeller to rotate, forming a suction vortex that continuously draws in external air and rotates at high speed to form a cooling airflow. The cooling airflow flows along the cooling air duct to achieve a cooling effect. Among them, the bottom cooling of the engine crankcase has a great influence on the working performance of the engine, because the engine oil required for the engine to work is finally gathered at the bottom of the crankcase after lubricating the engine parts through the lubricating oil path in the case. The heat dissipation effect of the bottom of the engine crankcase has an important influence on the temperature of the engine oil; and the existing engine crankcase has no obvious cooling air duct design at the bottom, or only a simple heat dissipation reinforcement rib structure is set, which cannot make the engine oil get good heat dissipation and cooling, and weakens the cooling effect of the engine oil on the engine parts. Therefore, a wind-cooled engine body that can dissipate heat from the engine base is designed. Utility Model Content

[0004] The utility model aims to provide an air-cooled engine body, by extending an air guide plate mounting hole downward in a base, fixing the air guide plate at the lower end of the air guide plate mounting hole, so that a cooling air duct is formed between the base and the air guide plate, and introducing air flow into the cooling air duct through the lower ventilation hole, thereby improving the heat dissipation capacity of the base and accelerating the cooling speed of the engine oil in the engine body.

[0005] The utility model provides the following technical solution: an air-cooled engine body, comprising a base and a box body, wherein an air guide plate mounting hole is formed on the bottom surface of the base and extends downward, the air guide plate mounting hole is used to install the air guide plate, the lower end of the air guide plate mounting hole extends to the bottom of the base, the base and the air guide plate form a cooling air duct, and a lower ventilation hole is opened at the lower end of the side surface of the box body, and the lower ventilation hole is connected to the cooling air duct.

[0006] In order to increase the wind speed of the lower ventilation hole, the lower ventilation hole is a rectangular hole on the side of the box body, an L-shaped air duct is formed on the base, and the lower end of the rectangular hole is connected to the L-shaped air duct.

[0007] In order to ensure uniform cooling of the base, a plurality of first reinforcing ribs are formed on the bottom surface of the base, and second reinforcing ribs are formed between the first reinforcing ribs to form a ventilation channel. The thickness of the first reinforcing ribs is smaller than the air guide plate mounting hole and greater than the thickness of the second reinforcing ribs.

[0008] In order to dissipate heat from the steel holes on the back of the box, a cylinder head connecting seat is formed on the upper end of the box, and a plurality of air guide plates are formed on the surface of the cylinder head connecting seat, and the air guide plates are integrally formed with the box.

[0009] In order to lubricate the camshaft, a camshaft bearing seat and a crankshaft bearing seat are formed in the housing, and a lubricating oil passage is opened at the upper end of the camshaft bearing seat.

[0010] In order to enhance the strength and rigidity of the crankshaft bearing seat, a third reinforcing rib is formed between the outer surface of the crankshaft bearing seat and the inner wall of the housing. The third reinforcing rib is distributed at intervals along the circumference of the crankshaft bearing seat, and the third reinforcing rib is extended outwardly in the radial direction.

[0011] In order to enhance the rigidity and strength of the two side surfaces of the box body, cross-shaped reinforcing ribs are distributed on the left and right side surfaces of the box body, and the cross-shaped reinforcing ribs have a small thickness and a large width.

[0012] Compared with the prior art, the beneficial effect achieved by the utility model is as follows: by extending the air guide plate mounting hole downward in the base, fixing the air guide plate at the lower end of the air guide plate mounting hole, so that a cooling air duct is formed between the base and the air guide plate, and introducing the air flow into the cooling air duct through the lower ventilation hole, thereby improving the heat dissipation capacity of the base and accelerating the cooling speed of the engine oil in the machine body. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0015] Figure 2 It is a stereogram of another viewing angle of the present utility model;

[0016] Figure 3 It is a bottom view of the utility model;

[0017] Figure 4 It is a front view of the utility model;

[0018] Figure 5 It is a side view of the utility model;

[0019] Figure 6 It is another side view of the utility model;

[0020] In the figure: 1. base; 11. first reinforcing rib; 12. second reinforcing rib; 13. air guide plate mounting hole; 2. housing; 21. camshaft bearing seat; 22. lubricating oil circuit; 23. crankshaft bearing seat; 24. steel hole; 3. air guide vane; 4. cylinder head connecting seat; 5. lower ventilation hole; 51. L-shaped air duct; 6. third reinforcing rib; 7. well-shaped reinforcing rib. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0022] See also Figure 1 and 2 The utility model provides a technical solution: an air-cooled engine body, including a base 1 and a box body 2. An air guide plate mounting hole 13 is formed on the bottom surface of the base 1 and extends downward. The air guide plate mounting hole 13 is used to install the air guide plate. The lower end of the air guide plate mounting hole 13 extends to the bottom of the base 1. The air guide plate is fixed to the bottom of the base 1 by connecting it with the air guide plate mounting hole 13 through a fastener. The base 1 and the air guide plate form a cooling air duct. A lower ventilation hole 5 is opened at the lower end of the side of the box body 2. The lower ventilation hole 5 is connected with the cooling air duct. The airflow is introduced into the base 1 from the side of the body through the lower ventilation hole 5 to dissipate heat from the base 1, thereby improving the heat dissipation capacity of the base 1 and accelerating the cooling speed of the engine oil in the body.

[0023] like Figure 3 As shown, the lower ventilation hole 5 is a rectangular hole on the side of the box body 2, and an L-shaped air duct 51 is formed on the base 1. The lower end of the rectangular hole is connected to the L-shaped air duct 51. The airflow enters the L-shaped air duct 51 from the rectangular hole, and the cross-section changes from large to small, which increases the flow rate of the airflow and accelerates the heat transfer.

[0024] Three first through-length reinforcing ribs 11 are formed on the bottom surface of the base 1. The first reinforcing ribs 11 divide the cooling air duct into four areas. Second reinforcing ribs 12 are formed between the first reinforcing ribs 11 to form a ventilation flow channel. The thickness of the first reinforcing ribs 11 is smaller than the air guide plate mounting hole 13 and larger than the thickness of the second reinforcing ribs 12. The airflow flows along the first reinforcing ribs 11 and passes through the second reinforcing ribs 12 in sequence to dissipate heat for the base 1, so that the airflow flows evenly and the heat dissipation of the base is even.

[0025] like Figure 4As shown, a cylinder head connecting seat 4 is formed at the upper end of the box body 2, and a plurality of parallel air guide plates 3 are formed on the surface of the cylinder head connecting seat 4. The air guide plates 3 are integrally formed with the box body 2, and steel holes 24 are formed on the back of the box body 2. Heat accumulates at the steel holes 24, and the heat dissipation is slow. The air ducts formed between the air guide plates 3 are used to accelerate the heat dissipation transfer at the steel holes 24.

[0026] A camshaft bearing seat 21 and a crankshaft bearing seat 23 are formed in the housing 2. The thickness of the camshaft bearing seat 21 and the crankshaft bearing seat 23 are increased to enhance the rigidity and strength of the camshaft bearing seat 21 and the crankshaft bearing seat 23. A lubricating oil passage 22 is opened at the upper end of the camshaft bearing seat 21, and lubricating oil is introduced into the camshaft through the lubricating oil passage 22 to lubricate the camshaft and reduce its wear.

[0027] A third reinforcing rib 6 is formed between the outer surface of the crankshaft bearing seat 23 and the inner wall of the housing 2. The third reinforcing ribs 6 are spaced apart with the circumference of the crankshaft bearing seat 23 as the distribution path. The third reinforcing ribs 6 are formed by extending outward along the radial direction, thereby enhancing the rigidity and strength of the crankshaft bearing seat 23 and the side of the housing 2. At the same time, a third reinforcing rib 6 is also arranged between the camshaft bearing seat 21 and the crankshaft bearing seat 23.

[0028] like Figure 5 and 6 As shown, the left and right sides of the box body 2 are both provided with cross-shaped reinforcing ribs 7 , which have a small thickness and a large width. The cross-shaped reinforcing ribs 7 enhance the strength and rigidity of the two sides of the box body 2 .

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An air-cooled engine body, comprising a base and a housing, characterized in that: An air guide plate mounting hole is extended downward on the bottom surface of the base, and the air guide plate mounting hole is used to install the air guide plate. The lower end of the air guide plate mounting hole extends to the bottom of the base, and the base and the air guide plate form a cooling air duct. A lower ventilation hole is opened at the lower end of the side of the box body, and the lower ventilation hole is connected to the cooling air duct.

2. The air-cooled engine body according to claim 1, characterized in that: The lower ventilation hole is a rectangular hole on the side of the box body, and an L-shaped air duct is formed on the base, and the lower end of the rectangular hole is connected to the L-shaped air duct.

3. The air-cooled engine body according to claim 2, characterized in that: A plurality of first reinforcing ribs are formed on the bottom surface of the base, and second reinforcing ribs are formed between the first reinforcing ribs to form ventilation channels. The thickness of the first reinforcing ribs is smaller than the air guide plate mounting hole and greater than the thickness of the second reinforcing ribs.

4. The air-cooled engine body according to claim 1, characterized in that: A cylinder head connecting seat is formed at the upper end of the box body, and a plurality of air guide plates are formed on the surface of the cylinder head connecting seat, and the air guide plates are integrally formed with the box body.

5. The air-cooled engine body according to claim 1, characterized in that: A camshaft bearing seat and a crankshaft bearing seat are formed in the box body, and a lubricating oil passage is opened at the upper end of the camshaft bearing seat.

6. The air-cooled engine body according to claim 5, characterized in that: A third reinforcing rib is formed between the outer surface of the crankshaft bearing seat and the inner wall of the box body. The third reinforcing ribs are distributed at intervals with the circumference of the crankshaft bearing seat as a distribution path, and the third reinforcing ribs are extended outwardly along the radial direction.

7. The air-cooled engine body according to claim 1, characterized in that: The left and right sides of the box body are both provided with well-shaped reinforcing ribs, and the well-shaped reinforcing ribs have a small thickness and a large width.

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