Cooling shell cover of gasoline engine

Abstract

The engine cooling shell cover is installed on the periphery of the heat dissipation impeller, the heat dissipation impeller is arranged on one side of the cylinder body, and the shell cover is formed by splicing and fixing a wind shielding half cover and a wind gathering half cover. Wherein the front side wall of the air gathering half cover protrudes outwards, an air gathering cavity is formed in the inner side of the air gathering half cover, the multiple air guide vane ribs are embedded in the cavity wall of the air gathering cavity from the large distance to the small distance and extend outwards away from the cavity wall, and the air guide vane ribs are bent towards the lower end of the air gathering half cover at the ends, with the small distances, of the multiple air guide vane ribs. The shell cover is formed by splicing the wind shielding half cover and the wind gathering half cover, the conventional prejudice that an existing shell cover does not adopt a split type design is broken through, and the wind gathering half cover can be provided with a wide and large wind gathering cavity; and more than a certain number of large-area air guide vane ribs are arranged in the air gathering chamber and are used for gathering wind power generated by the heat dissipation impeller and then centrally, efficiently and obviously cooling the cylinder body, so that the service life of the engine is further prolonged, the single-time use time of the engine is prolonged, and the use efficiency of agricultural and forestry machinery is improved.

Description

Technical Field

[0001] The utility model relates to a cooling shell cover, in particular to a cooling shell cover of a gasoline engine. Background Art

[0002] In the field of agricultural and forestry machinery in my country, garden machinery widely uses general-purpose gasoline engines such as 142 and 144 as power sources. Figure 1 As shown, the other side of the power output shaft of this type of gasoline engine is equipped with a cooling impeller. The starter pull plate A has three screw hole installation positions. Through the action of the nut, the starter pull plate A can press the air guide cover B tightly to make it firmly installed on the cylinder body. During the power output process, the cooling impeller rotates circumferentially, and the air guide cover B (which is placed on the cylinder body and surrounds the periphery of the impeller) collects the wind pressure generated by the inner cooling impeller to one side along the inner wall of the air guide cover, and then most of the wind pressure is collected and blown to the cooling gill part C on the cylinder assembly of the cylinder body, so that the temperature of the power cylinder body is kept within a certain value range to ensure its stable operation.

[0003] At present, the industry has set the rated speed of the cylinder body at 7200-8000 rpm, and the temperature generated can be basically stably controlled between 170-178 degrees within half an hour. Keeping the temperature within a certain numerical range can extend the service life of the gasoline engine, and at the same time ensure the use time of the gasoline engine when it is used once.

[0004] However, since the cylinder structure is already quite mature, it is difficult for engineers to make further improvements. Therefore, reducing the temperature generated by the cylinder during operation has become an urgent issue to be solved in the current industry. For gasoline engines, reducing the operating temperature means extending the service life and ensuring the single-use time, which is undoubtedly a difficult problem that needs to be solved in the industry.

[0005] In summary, in the field of garden machinery, the operating temperature control of gasoline engines is crucial. By optimizing the design of the cooling system, improving the engine's working efficiency and reducing the operating temperature, it is expected to bring more lasting and stable power output to garden machinery to meet user needs. At the same time, this also provides new directions and challenges for the research and development of related technologies in the industry. Summary of the invention

[0006] The purpose of the utility model is to solve the technical problems of high single-operation temperature and short operation time of the engine in the current industry, and to provide a gasoline engine cooling shell cover which is low in cost, has obvious cooling effect, can extend the service life of the engine and extend the single-operation time.

[0007] A gasoline engine cooling shell cover, wherein the shell cover is installed around a heat dissipation impeller, and the heat dissipation impeller is arranged on one side of a cylinder body, and is characterized in that: the shell cover is formed by splicing and fixing a wind shielding half cover and a wind gathering half cover; wherein, the front side wall of the wind gathering half cover protrudes outwardly to form a wind gathering chamber on its inner side, and a plurality of air guide blade ribs are embedded on the wall of the wind gathering chamber with spacing varying from large to small, and extend outward away from the wall, and at one end with a small spacing between the plurality of air guide blade ribs, the plurality of air guide blade ribs at this end are bent toward the lower end of the wind gathering half cover.

[0008] Preferably, half a protrusion is provided corresponding to each other on the two halves of the wind shielding half cover and the wind gathering half cover at the splicing edge, and the protrusion forms a convex column after the wind shielding half cover and the wind gathering half cover are spliced ​​together, and a circle of gaskets is inserted into the convex column to fix the splicing part.

[0009] Preferably, screw holes are provided at the splicing edges of the wind shielding half cover and the wind gathering half cover for fastening by screws passing through the screw holes when splicing.

[0010] Preferably, the air guide blade ribs extend away from the cavity wall to the periphery of the heat dissipation impeller, and are cut along the arc formed by the blades when the heat dissipation impeller runs to form a notch.

[0011] Preferably, the shielding half-shield wall is arranged around the heat dissipation impeller, and the foot of the shield wall is also provided with a wrapping edge, and the wrapping edge is partially or completely stuck in the gap between the bottom of the heat dissipation impeller and the shell cover.

[0012] Preferably, the outer side of the shielding half cover and / or the wind gathering half cover is provided with a bolt groove for fixing the shell cover to the cylinder body, and a support for the nut to be directly or indirectly sleeved on the bolt and fixed is extended from the groove walls on both sides of the bolt groove at the upper end.

[0013] Preferably, the portion of the wind-collecting half-cover that protrudes outwardly and is located around the heat dissipation impeller is larger, and the heat dissipation portion located at the front end of the cylinder body is smaller.

[0014] The beneficial effects of the utility model are as follows:

[0015] Compared with the prior art, the utility model adopts a shell cover that is composed of a wind-shielding half cover and a wind-gathering half cover, breaking the conventional prejudice that the prior shell cover does not adopt a split design, so that the wind-gathering half cover can be provided with a wide wind-gathering chamber, and more than a certain number of large-area wind guide ribs are arranged in the wind-gathering chamber to gather the wind generated by the heat dissipation impeller and then cool the cylinder body in a concentrated, efficient and significant manner, further extending the service life of the engine, and also extending the single use time of the engine, thereby improving the use efficiency of agricultural and forestry machinery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0017] Figure 1 It is a schematic diagram of the appearance of an existing gasoline engine.

[0018] Figure 2 It is a structural schematic diagram of the gasoline engine of the utility model;

[0019] Figure 3 yes Figure 2 Schematic diagram of local decomposition structure;

[0020] Figure 4 It is a schematic diagram of the structure of the shell cover relative to the heat dissipation impeller of the utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the wind gathering half cover of the utility model;

[0022] Figure 6 It is a structural schematic diagram of the wind shield half cover described in the utility model. DETAILED DESCRIPTION

[0023] The following will be 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, that is, a large number of specific details are given to provide a more thorough understanding of the present invention. However, for those skilled in the art, the present invention can be implemented without one or more of these details. In these examples, in order to avoid confusion with the present invention, some technical features known in the art are not described.

[0024] It should be understood that the present invention can be implemented in different forms and should not be construed as being limited to the embodiments presented herein. Therefore, they are only used as examples and cannot be used to limit the scope of protection of the present invention.

[0025] In addition, 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 technicians in the field to which the utility model belongs.

[0026] See also Figures 1 to 6, a gasoline engine cooling shell cover, the shell cover is installed around the cooling impeller D, the cooling impeller D is arranged on one side of the cylinder body and connected to the motor shaft, the shell cover presses the starting pull plate A, the starting pull plate A corresponds to the starter A1 arranged in the middle of the cooling impeller D and connected to the motor shaft, and the starting pull plate A is pulled by the user, thereby driving the starter A1 to rotate the motor shaft, thereby driving the engine to run.

[0027] The shell cover is composed of a wind shielding half cover 1 and a wind gathering half cover 2 which are assembled and fixed together; wherein, the front side wall of the wind gathering half cover 2 protrudes outwardly to form a wind gathering chamber 31 on its inner side, and a plurality of air guide ribs 3 are embedded on the wall of the wind gathering chamber 31 with the spacing between them varying from large to small, and extend outward away from the wall, and at the end with the small spacing between the plurality of air guide ribs 3, the air guide ribs are all bent toward the lower end of the wind gathering half cover 2.

[0028] The air guide ribs 3 are at least two, dividing the air collecting chamber 31 into three sub-chambers: upper, middle and lower. Facing the rotation direction of the heat dissipation impeller D, the opening spacing between the two air guide ribs is the largest, and the other end of the air collecting chamber 31 is the end where the opening spacing between the two air guide ribs is the smallest.

[0029] This design further compresses the air volume, increases the wind pressure, and blows it toward the cooling gills C on the cylinder block assembly, which is very helpful to improve the heat dissipation effect and reduce the engine operating temperature. The combination of the wind shielding half cover 1 and the wind gathering half cover 2, as well as the arrangement of the air guide ribs 3, enables the engine to dissipate heat better during operation and maintain a suitable operating temperature. This gasoline engine cooling shell cover is cleverly designed, combining structure and functionality, and helps to improve the operating efficiency and stability of the engine. It has a wide range of application value in fields such as garden machinery, and provides strong support for the development of industry technology.

[0030] When the utility model is implemented, the experimental test is carried out under the same conditions as the existing engine. The test equipment used for the test is produced by Tianjin Internal Combustion Engine Research Institute and Tianjin Keda Power Measurement and Control Technology Co., Ltd., which corresponds to the temperature test corresponding to the engine performance test of the engine bench test system of the equipment. The temperature sensing gasket is placed on the spark plug of the heat dissipation gill part C. The test results are as follows:

[0031] The outdoor temperature is 1 degree and the indoor temperature is 9 degrees.

[0032] Another test result was obtained when the outdoor temperature was 2 degrees and the indoor temperature was 10 degrees. The temperature, time and speed were similar. The old gasoline engine finally stabilized at around 175 degrees, while the gasoline engine installed with the air guide and cooling cover stabilized at around 138 degrees.

[0033] The experimental results are very obvious. The air guide and cooling shell cover has a very significant effect and has completely broken the industry standard. It has increased the service life of the gasoline engine by one level, and the single use time has been extended and sustained.

[0034] Furthermore, as an improvement to the present invention, half a protrusion is provided corresponding to each other at the edges of the wind shielding half cover 1 and the wind gathering half cover 2, and the protrusion forms a convex column after the edges of the wind shielding half cover and the wind gathering half cover are spliced ​​together, and a circle of gaskets is inserted into the convex column to fix the splicing part.

[0035] During implementation, the two halves of the wind shielding half cover 1 and the wind gathering half cover 2 are provided with half protrusions corresponding to each other at the spliced ​​edges, including a front protrusion 11 of the shield, a front protrusion 21 of the gathering cover, or / and a rear protrusion 12 of the shield, a rear protrusion 22 of the gathering cover, and the corresponding ring gasket sleeves are also front protrusion ring gasket sleeves 41 and / or rear protrusion ring gasket sleeves 42.

[0036] During installation, after the wind shielding half cover 1 and the wind gathering half cover 2 are put together, the washer sleeve is put on the boss, and then the starter pull plate A is installed. If the boss is composed of the shield front protrusion 11 and the gathering cover front protrusion 21, there is a cavity in the middle of the boss, and the cavity is for the screw rod extending from the engine to pass through. When the starter pull plate A is pressed down, one of the installation feet just presses on the upper surface of the boss and allows the screw rod to pass through. The nut is screwed to the screw rod from above so that the starter pull plate A is fixedly pressed on the shell cover composed of the wind shielding half cover 1 and the wind gathering half cover 2, and the washer sleeve is also limited on the boss.

[0037] If the convex column is composed of the mask rear protrusion 12 and the gathering cover rear protrusion 22, after the start pull plate A is pressed down and fixed, the lower part of the start pull plate A is also pressed on the upper part of the convex column, and the ring washer is also limited on the convex column.

[0038] The ring washer sleeve can quickly combine and assemble the wind shielding half cover 1 and the wind gathering half cover 2, and also utilizes the state of the start pull plate A during installation to limit the position, so the structure is ingenious and the assembly is quick.

[0039] Furthermore, as an improvement to the present invention, screw holes are provided at the joint edges of the wind shielding half cover 1 and the wind gathering half cover 2 for screws to pass through and fix during the joint.

[0040] In practice, the screw holes are arranged on flange plates 13, 23 extending from the front ends of the wind shielding half cover 1 and the wind collecting half cover 2. In addition, in practice, due to the different materials used, when the engine is running, the heat of the engine bakes the wind shielding half cover 1 and the wind collecting half cover 2 unevenly due to their positions and structures, and the high temperature generated may cause deformation of the joints. Flange plates may also be arranged at the rear ends of the wind shielding half cover 1 and the wind collecting half cover 2 simultaneously or separately, and then fixed by screws.

[0041] Continue reading Figure 5Further, as an improvement to the present invention, the air guide blade rib 3 extends away from the cavity wall to the periphery of the heat dissipation impeller D, and when the heat dissipation impeller D runs, the wheel blade forms an arc cut to form a notch 32.

[0042] During implementation, the blades form an arc and a notch 32 is cut along the operation of the heat dissipating impeller D. When the heat dissipating impeller D rotates to generate wind pressure, the wind pressure enters from the end with a larger spacing between the plurality of air guide fin ribs 3 and then is pressed toward the end with a smaller spacing. The wind pressure is further guided and compressed between the air guide fin ribs, and will not be mixed into the channel formed by the air guide fin ribs on the other side and the outermost air guide fin ribs, thereby ensuring the stable change of wind pressure in each channel.

[0043] Continue reading Figure 6 Further, as an improvement to the present invention, the shielding half-cover 1 has a cover wall disposed around the cooling impeller D, and a wrapping edge 14 is provided at the foot of the cover wall, and the wrapping edge 14 is partially or completely inserted into the gap between the bottom of the cooling impeller and the shell cover.

[0044] During implementation, the wind generated by the rotation of the heat dissipation impeller D is blocked by the shielding half cover 1 so as not to disperse the pressure. The cover wall is close to the periphery of the heat dissipation impeller D, and more space is saved for the exhaust port, so that the heat brought by the exhaust port can be fully dissipated.

[0045] Further, as an improvement of the utility model, the outer side of the shielding half cover 1 and / or the wind collecting half cover 2 is provided with a clamping bolt groove 5 for fixing the shell cover to the cylinder body, and a support 51 for the nut to be directly or indirectly sleeved on the bolt and fixed is extended from the groove walls on both sides of the clamping bolt groove 5 at the upper end. The support 51 ensures that the engine can be stably started after the starter pull plate A is placed.

[0046] The design of the support platform 51 fully considers the stability and operational convenience of the starter pull plate A.

[0047] The bolt slots 5 provided on the shielding half cover 1 and the wind collecting half cover 2 can play a positioning role during installation, and can also be used to clamp the cover body on the heat dissipation impeller D by using the position of the bolts after the bolts are passed through, without displacement.

[0048] Further, as an improvement to the present invention, the portion of the wind-collecting half cover 2 protruding outwards is larger around the heat dissipation impeller D, and the heat dissipation portion C located at the front end of the cylinder body is smaller.

[0049] During implementation, the above-mentioned arrangement of the wind-collecting half cover 2 can make the wind blow out with a higher wind speed and a stronger wind pressure, and the heat dissipation of the screen plate of the heat dissipation part C can be faster.

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

Claims

1. A gasoline engine cooling housing, the housing being installed around a cooling impeller, the cooling impeller being arranged on one side of a cylinder body, and characterized in that: The shell cover is formed by splicing and fixing a wind-shielding half cover and a wind-gathering half cover; wherein, the front side wall of the wind-gathering half cover protrudes outwardly to form a wind-gathering chamber on its inner side, and a plurality of air-guiding ribs are embedded on the wall of the wind-gathering chamber with spacing varying from large to small, and extend outward away from the wall, and at one end with a small spacing between the plurality of air-guiding ribs, the plurality of air-guiding ribs at this end are all bent toward the lower end of the wind-gathering half cover.

2. The gasoline engine cooling cover according to claim 1, characterized in that: Half a protrusion is arranged corresponding to each other on the two half covers at the spliced ​​edges of the wind shielding half cover and the wind gathering half cover. The protrusion forms a protrusion after the edges of the wind shielding half cover and the wind gathering half cover are spliced ​​together. A circle of pads is sleeved into the protrusion to fix the spliced ​​part.

3. The gasoline engine cooling cover according to claim 2, characterized in that: The splicing edges of the wind shielding half cover and the wind gathering half cover are also provided with screw holes for screws to be passed through and fixed during splicing.

4. The gasoline engine cooling cover according to claim 1, characterized in that: The air guide blade ribs extend away from the cavity wall to the periphery of the heat dissipation impeller, and are cut along the arc formed by the blades when the heat dissipation impeller runs to form a notch.

5. The gasoline engine cooling cover according to claim 1, characterized in that: The cover wall of the wind shielding half cover is arranged around the heat dissipation impeller, and the cover wall foot is also provided with a wrapping edge, and the wrapping edge is partially or completely stuck in the gap between the bottom of the heat dissipation impeller and the shell cover.

6. The gasoline engine cooling cover according to claim 1, characterized in that: The outer side of the wind shielding half cover and / or wind gathering half cover is provided with a bolt groove for fixing the shell cover to the cylinder body, and a support for the nut to be directly or indirectly sleeved on the bolt and fixed is extended from the groove walls on both sides of the bolt groove at the upper end.

7. The gasoline engine cooling cover according to claim 1, characterized in that: The part of the wind-collecting half-cover that protrudes outward is larger and is located around the heat dissipation impeller, while the heat dissipation part located at the front end of the cylinder body is smaller.

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