Wind scooper and engine

Abstract

The wind scooper comprises a scooper body, a first separation part and a second separation part, a first cavity, a second cavity and a third cavity are arranged in the scooper body, the second cavity and the third cavity are respectively communicated with the first cavity, the first separation part is arranged in the first cavity, the first separation part is provided with a first flow guide face, and the second separation part is provided with a second flow guide face. The first flow guide face is used for guiding airflow to the cavity bottom of the first cavity and the second cavity. The second partition part divides the second cavity and the third cavity and is provided with a second flow guide face, and the second flow guide face is used for guiding airflow to the third cavity. The internal space of the cover body is separated by designing the first separation part and the second separation part, airflow generated by the impeller can be reasonably distributed, the airflow flows to all areas, needing to be cooled, of the power main body, the problems of mutual influence and interference before the airflow flows to all the areas are solved, and the cooling effect of the power main body is improved. The cooling and heat dissipation effects on the power main body are improved, the engine oil temperature of the whole machine is reduced, and the dynamic property and economical efficiency of the whole machine are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to an air guide cover and an engine. Background Art

[0002] Most general small gasoline engines use an air-cooling structure to cool the entire machine. It is of vital importance to dissipate heat from the entire small gasoline engine by designing an excellent air-cooling system.

[0003] See attached Figure 1 Different parts of the engine have different cooling airflow requirements. For example, the spark plug side requires a large and concentrated cooling airflow; the side below the cylinder block, the side above the box, and the side below the box require a wide cooling airflow coverage area; the side below the box requires a large cooling airflow.

[0004] The cooling fan air scoop is an important component of the air-cooled cooling system. Conventional air scoops only rely on the shape of the volute to form a single involute or multiple involutes to achieve air volume distribution. Since there are no ribs to separate the interior of the conventional air scoop, the airflow in each area is likely to affect and interfere with each other, which will have a certain negative impact on the heat dissipation effect of the entire machine. Utility Model Content

[0005] In view of the defects in the prior art, the purpose of the present invention is to provide an air guide cover and an engine, which can reasonably distribute the airflow and improve the cooling and heat dissipation effect of the power body.

[0006] In order to achieve the above-mentioned purpose, the utility model provides an air guide hood, including a hood body, provided with a first cavity, and a second cavity and a third cavity respectively connected to the first cavity, the inner wall of the first cavity extends in an involute shape, the second cavity and the third cavity are arranged on the same side, and the second cavity is arranged below the third cavity; a first partition part, arranged in the first cavity, the first partition part is provided with a first guide surface, the first guide surface is used to guide the airflow to the cavity bottom of the first cavity and the second cavity; and a second partition part, separating the second cavity and the third cavity, the second partition part is provided with a second guide surface, the second guide surface is used to guide the airflow to the third cavity.

[0007] Preferably, the first guide surface and the second guide surface both extend in an involute shape.

[0008] Preferably, a first connecting surface is provided at the bottom of the first cavity, and a second connecting surface is provided on a side of the second cavity facing the second partition, and the first connecting surface is connected to the first guide surface and the second connecting surface respectively.

[0009] Preferably, an end of the second connecting surface away from the first connecting surface gradually rises upward.

[0010] Preferably, the second partition is provided with a third guide surface on one side of the second cavity, and the third guide surface extends in an involute shape.

[0011] Preferably, an angle gap is formed between the first partition and the inner wall of the first cavity, and the width of the angle gap gradually decreases in a direction toward the bottom of the cover body.

[0012] Preferably, the first partition and the second partition are both plate-shaped structures.

[0013] Preferably, a clearance gap is provided on the second partition.

[0014] The utility model also provides an engine, comprising the above-mentioned air guide cover.

[0015] Beneficial effects of the utility model:

[0016] The utility model discloses an air guide cover and an engine, which abandon the structural form of the conventional air guide cover that only relies on the volute shape to achieve air volume distribution. By designing a first partition part and a second partition part to separate the internal space of the cover body, the airflow generated by the impeller can be reasonably distributed, so that the airflow flows to various areas that need to be cooled by the power body, and the problem of mutual influence and interference of the airflow before flowing to various areas is solved, the cooling and heat dissipation effect of the power body is improved, the oil temperature of the whole machine is reduced, and the power and economy of the whole machine are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0018] Figure 1 This is the front view of the power body;

[0019] Figure 2 A schematic structural diagram of an air guide cover provided in one embodiment of the present utility model;

[0020] Figure 3 is a cross-sectional schematic diagram of the cover body;

[0021] Figure 4 It is a cross-sectional schematic diagram of the cooperation between the cover and the impeller;

[0022] Figure 5 A schematic diagram of the structure in which the first arc surface, the first connecting surface and the second connecting surface are connected;

[0023] Figure 6 Schematic diagram of the structure of one side of the fourth arc surface;

[0024] Figure 7 It is a structural diagram of the cooperation between the cover body and the power main body box;

[0025] Figure 8 It is a structural diagram of the bottom of the power main body box;

[0026] Figure 9 This is a schematic diagram of the structure of the second partition and the power main cylinder body;

[0027] Figure 10 Schematic diagram of the airflow field of the air guide cover;

[0028] Reference numerals:

[0029] 10. Cover body; 11. First cavity; 111. First connecting surface; 12. Second cavity; 121. Second connecting surface; 13. Third cavity; 20. First partition; 21. First guide surface; 30. Second partition; 31. Second guide surface; 32. Third guide surface; 33. Clearance; 40. Angled gap; 50. Impeller; 60. Power body; 70. Air outlet. DETAILED DESCRIPTION

[0030] The following embodiments of the technical solution of the present invention are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0031] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which this utility model belongs.

[0032] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of this utility model, "plurality" means more than two, unless otherwise specifically defined.

[0034] In this application, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0035] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0036] like Figure 2-10 As shown, in one embodiment of the present invention, an air guide cover is provided, comprising a cover body 10, a first partition 20, and a second partition 30. The cover body 10 is provided with a first cavity 11, and a second cavity 12 and a third cavity 13 respectively connected to the first cavity 11. The inner wall of the first cavity 11 extends in an involute shape, the second cavity 12 and the third cavity 13 are arranged on the same side, and the second cavity 12 is located below the third cavity 13. The first partition 20 is provided in the first cavity 11 and is provided with a first guide surface 21. The first guide surface 21 is used to guide airflow to the cavity bottom of the first cavity 11 and the second cavity 12. The second partition 30 separates the second cavity 12 and the third cavity 13. The second partition 30 is provided with a second guide surface 31. The second guide surface 31 is used to guide airflow to the third cavity 13.

[0037] The high-speed rotation of the impeller 50 generates a portion of the airflow, which is directed by the inner wall of the first chamber 11 toward the upper and rear sides of the casing, primarily cooling the upper and rear sides of the casing. Another portion of the airflow is directed by the first guide surface 21 toward the bottom of the first chamber 11 and the second chamber 12. The airflow from the bottom of the first chamber 11 passes through the air outlet 70 to cool the lower side of the casing. The airflow directed toward the second chamber 12 is directed toward the lower side of the cylinder, thereby cooling the lower side of the cylinder.

[0038] A portion of the airflow generated by the high-speed rotation of the impeller 50 will be guided by the second guide surface 31 to the third chamber 13. This portion of the airflow will be guided to the spark plug side above the cylinder body, thereby cooling the spark plug side.

[0039] The wind guide cover disclosed in this embodiment abandons the structural form of conventional wind guide covers that only rely on the volute shape to achieve air volume distribution. By designing a first partition 20 and a second partition 30 to separate the internal space of the cover body 10, the airflow generated by the impeller 50 can be reasonably distributed so that the airflow flows to various areas that need to be cooled by the power body 60, solving the problem of mutual influence and interference before the airflow flows to various areas, improving the cooling and heat dissipation effect of the power body 60, reducing the oil temperature of the whole machine, and improving the power and economy of the whole machine.

[0040] In one embodiment, the first guide surface 21 and the second guide surface 31 both extend in an involute shape. The first guide surface 21 guides the airflow, making it easier for the airflow to be directed toward the bottom of the first cavity 11 and the second cavity 12. Similarly, the second guide surface 31 guides the airflow, making it easier for the airflow to be directed toward the angle between the third cavity 13 and the second partition 30. This allows as much airflow as possible to flow toward the top of the cylinder block and toward the spark plug, thereby enhancing the cooling effect on the spark plug.

[0041] This air guide hood is different from the conventional air guide hood that relies on the shape of the volute to form a single involute or multiple involutes. The first partition 20 and the second partition 30 separate the internal space of the hood body 10, and can reasonably distribute the airflow generated by the impeller 50, so that the airflow flows to various areas that need to be cooled on the power body 60, solving the problem of mutual influence and interference of the airflow before flowing to various areas.

[0042] In one embodiment, a first connecting surface 111 is provided at the bottom of the first cavity 11, and a second connecting surface 121 is provided on the side of the second cavity 12 facing the second partition 30. The first connecting surface 111 is respectively connected to the first guide surface 21 and the second connecting surface 121. The smooth transition between the first guide surface 21, the first connecting surface 111, and the second connecting surface 121 reduces resistance to airflow, improves airflow velocity, and improves airflow guidance.

[0043] In one embodiment, in order to allow the airflow entering the second cavity 12 to flow smoothly to the bottom of the cylinder body, the end of the second connecting surface 121 away from the first connecting surface 111 gradually rises upward.

[0044] In one embodiment, the second partition 30 is provided with a third guide surface 32 on one side of the second cavity 12. The third guide surface 32 extends in an involute shape. The third guide surface 32 directs the airflow toward the angle between the second cavity 12 and the second partition 30, thereby allowing as much airflow as possible to flow toward the lower side of the cylinder body, thereby enhancing the cooling effect on the lower side of the cylinder body.

[0045] In one embodiment, an angled gap 40 is formed between the first partition 20 and the inner wall of the first cavity 11. The width of the angled gap 40 gradually decreases toward the bottom of the housing 10. Airflow entering the angled gap 40 is blocked by the first partition 20 and directed out of the angled region. Since the angled region is close to the bottom of the housing, this airflow is directed toward the air outlet 70, thereby cooling the lower side of the housing.

[0046] In one embodiment, the first partition 20 and the second partition 30 are both plate-shaped structures. The first partition 20 and the second partition 30 are integrally formed with the cover body 10. The plate-shaped first partition 20 and the second partition 30 divide the interior space of the cover body 10 without occupying too much space inside the cover body 10.

[0047] In one embodiment, in order to make way for the cylinder body, a making way notch 33 is provided on the second partition 30 .

[0048] This embodiment also provides an engine, including the above-mentioned air guide cover. Due to the use of the above-mentioned air guide cover, it has the same working principle and technical effects as the air guide cover in the above-mentioned embodiment, which will not be repeated here.

[0049] In the specification of the present invention, a large number of specific details are described. However, it is understood that the embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. An air guide cover, characterized in that: include: The cover body (10) is provided with a first cavity (11), and a second cavity (12) and a third cavity (13) respectively connected to the first cavity (11); the inner wall of the first cavity (11) extends in an involute shape; the second cavity (12) and the third cavity (13) are arranged on the same side; and the second cavity (12) is arranged below the third cavity (13); a first partition (20) disposed in the first cavity (11), the first partition (20) being provided with a first flow-guiding surface (21), the first flow-guiding surface (21) being used to guide airflow toward the cavity bottom of the first cavity (11) and the second cavity (12); and A second partition (30) separates the second cavity (12) and the third cavity (13). The second partition (30) is provided with a second guide surface (31). The second guide surface (31) is used to guide the airflow to the third cavity (13).

2. The air guide cover according to claim 1, characterized in that: The first flow-guiding surface (21) and the second flow-guiding surface (31) both extend in an involute shape.

3. The air guide cover according to claim 2, characterized in that: The bottom of the first cavity (11) is provided with a first connecting surface (111), and the side of the second cavity (12) facing the second partition (30) is provided with a second connecting surface (121), and the first connecting surface (111) is connected to the first guide surface (21) and the second connecting surface (121) respectively.

4. The air guide cover according to claim 3, characterized in that: An end of the second connecting surface (121) away from the first connecting surface (111) gradually warps upward.

5. The air guide cover according to claim 4, characterized in that: The second partition (30) is located on one side of the second cavity (12) and is provided with a third guide surface (32), and the third guide surface (32) extends in an involute shape.

6. The air guide cover according to claim 2, characterized in that: An angle gap (40) is formed between the first partition (20) and the inner wall of the first cavity (11), and the width of the angle gap (40) gradually decreases in a direction toward the bottom of the cover body (10).

7. The air guide cover according to claim 2, characterized in that: The first partition (20) and the second partition (30) are both plate-shaped structures.

8. The air guide cover according to claim 1, wherein: The second partition (30) is provided with a clearance notch (33).

9. An engine, characterized in that: The invention comprises the air guide cover according to any one of claims 1 to 8.

Images