A general gasoline engine with horizontal crankshaft output

Abstract

The present invention discloses a general-purpose gasoline engine with a horizontal crankshaft output, comprising an engine body, a panel and a muffler cover provided on one side of the engine body, a fuel tank body provided on the other side of the engine body, a fuel tank cover provided on the outer surface of the fuel tank body, the panel provided on the front end surface of one side of the engine body, the muffler cover located above the panel, the front end of the muffler cover being snapped onto the upper end surface of the panel, and the left side of the fuel tank cover being snapped onto the right side of the muffler cover and the right side of the panel. The present invention has the advantages of ingenious design, simple structure, and low cost. It is not only easy to assemble and improves assembly efficiency, but also effectively prevents the infiltration of snow and rain. At the same time, since the infiltration of snow and rain is blocked, the corrosion and freezing of internal components by snow and rain are effectively prevented, thereby improving the stability of the engine operation. In addition, through plastic injection molding, the weight is reduced and the manufacturing difficulty is reduced.

Description

Technical Field

[0001] The present invention relates to a universal machine, in particular to a universal gasoline engine with horizontal crankshaft output. Background Art

[0002] At present, the existing general gasoline engine includes an engine body, a panel and a muffler cover are provided on one side of the engine body, a fuel tank is provided on the other side of the engine body, and a fuel tank cover is provided outside the fuel tank; the connection position between the muffler cover and the panel is basically set at the top of the muffler cover; wherein, the panel, muffler cover, fuel tank and fuel tank cover are respectively connected and fixed to the engine body by fasteners such as bolts, which not only makes the structure complicated, but also makes the assembly process more complicated, increases the assembly time, reduces the assembly efficiency, and increases the manufacturing cost accordingly.

[0003] Meanwhile, on existing general-purpose gasoline engines, the fuel tank and fuel tank cover are assembled together and then mounted directly on the engine body via a bracket. The bottom of the fuel tank is in direct contact with the engine body, and the fuel tank cover serves only as a decorative and waterproof feature. This fuel tank structure is complex, difficult to assemble, and expensive. Furthermore, since the bottom of the fuel tank is in direct contact with the engine body, the temperature of the fuel inside the tank rises during operation due to the rise in engine temperature, which accelerates the evaporation rate of the fuel in the tank and wastes fuel.

[0004] Moreover, on existing general-purpose gasoline engines, due to structural limitations, the connections between the panel and the muffler cover, the panel and the fuel tank cover, and the muffler cover and the fuel tank cover have connection gaps. When encountering rainy and snowy weather, snow and rain can slowly seep into the gaps, corroding and freezing the internal parts of the engine, causing damage to the parts. Summary of the Invention

[0005] The purpose of the present invention is to provide a general gasoline engine with horizontal crankshaft output which is simple, quick and low-cost to assemble.

[0006] The objective of the present invention is achieved through such a technical solution: a general-purpose gasoline engine with horizontal crankshaft output, comprising an engine body, a panel and a muffler cover provided on one side of the engine body, a fuel tank body provided on the other side of the engine body, a fuel tank cover provided outside the fuel tank body, the panel provided on the front end surface of one side of the engine body, the muffler cover located above the panel and the front end of the muffler cover snapped onto the upper end surface of the panel, the left side of the fuel tank cover snapped onto the right side of the muffler cover and the right side of the panel.

[0007] Among them, in order to facilitate the assembly between the fuel tank body and the fuel tank cover, a refueling port is vertically provided on the fuel tank body, an oil outlet is provided on the lower end surface of the fuel tank body, an oil pipe is provided on the oil outlet, the refueling port passes through the upper end surface of the fuel tank cover, and a locking mechanism is provided on the refueling port. The fuel tank body is fastened to the fuel tank cover through the locking mechanism so that the fuel tank cover bears the weight of the fuel tank body.

[0008] Wherein, the locking mechanism includes a thread arranged on the outer wall of the fuel filler port, and a locking nut matched with the thread is sleeved on the outer wall of the fuel filler port.

[0009] In order to ensure that the fuel tank cover is firmly connected to the engine body, fixed connecting parts are provided on the right outer wall and the left outer wall of the fuel tank cover.

[0010] There are two fixed connecting parts arranged on the right outer wall of the fuel tank cover, and one fixed connecting part arranged on the left outer wall.

[0011] Further description, the fixed connecting part of the right outer wall of the fuel tank cover is the mounting hole A and the mounting hole B set on both ends of the right outer wall; the fixed connecting part on the left outer wall is the bolt through hole A set in the middle of the left outer wall.

[0012] In order to facilitate the installation of the motor control box, a motor control box connected to the mounting hole A and the mounting hole B is provided on the right outer wall of the fuel tank cover.

[0013] In order to guide the flow of snow and rain on the fuel tank cover, a waterproof belt A is provided on the left side of the fuel tank cover. The waterproof belt A is arranged along the left outer wall to form an arch, and a side plate integral with the waterproof belt A is vertically provided at the outer end of the waterproof belt A; a limiting boss is provided in the middle of the waterproof belt A, and the bolt through hole A is provided in the limiting boss.

[0014] In order to reduce weight, the wall thickness of the fuel tank outer cover skirt gradually decreases from top to bottom.

[0015] In order to block the heat transferred from the muffler and prevent the infiltration of snow and rain, a partition integrated with the fuel tank cover is vertically arranged on the left side of the fuel tank cover, and the partition and the interior of the fuel tank cover are annularly closed.

[0016] In order to improve the strength of the fuel tank cover, longitudinal and transverse reinforcement ribs B are provided on the top of the inner surface of the fuel tank cover, and the reinforcement ribs B near the bend of the inner surface of the fuel tank cover extend to the inner surface of the fuel tank cover skirt.

[0017] In order to limit the position of the oil pipe on the oil tank, a plate is provided on the inner wall of the front end surface of the oil tank cover. The plate and the inner wall of the front end surface form a limiting groove, and the oil pipe is located in the limiting groove.

[0018] In order to reduce costs and simplify the manufacturing process, the fuel tank body is blow-molded.

[0019] In order to facilitate the connection between the muffler cover and the panel and effectively prevent the infiltration of snow and rain, the muffler cover is snapped onto the upper end surface of the panel and connected by bolts; a heat insulation plate connected to the carburetor is vertically arranged on the inner side of the panel, and the inner side of the panel, the inner side of the heat insulation plate and the outer side of the front end of the muffler cover form a space for protecting the carburetor.

[0020] The heat insulation plate comprises a vertically arranged straight plate, an inclined plate integrally formed with the straight plate is arranged on the upper portion of the straight plate, the straight plate is connected to the carburetor; the inclined surface of the inclined plate faces the muffler cover.

[0021] In order to further prevent the infiltration of rain and snow, a semi-enclosed baffle for shielding the front side and the right side is provided on the inner wall of the muffler cover.

[0022] Furthermore, in order to improve the waterproof performance and guide the flow of snow and rain, the lower end of the semi-enclosed baffle extends downward and is located above the insulation board, and the lower end of the semi-enclosed baffle is lower than the upper end surface of the insulation board.

[0023] Further description: A buckle cover that is integrated with the muffler cover is provided at the front end of the muffler cover; the panel includes an upper end face and an inclined front end face, and a step is provided at the junction of the front end face and the upper end face, and the buckle cover is buckled on the step.

[0024] In order to allow rain and snow to flow down smoothly, the front end surface of the buckle cover has a slope, and the buckle cover is buckled on the step and the slope forms the same slope as the front end surface.

[0025] In order to improve the heat dissipation effect, a shutter is provided on the upper end surface of the muffler outer cover, and heat dissipation ribs are vertically provided on the left side, right side and rear end surface of the muffler outer cover.

[0026] In order to improve the strength of the muffler outer cover, a reinforcing rib A surrounding the louver is provided on the upper end surface of the muffler outer cover and at the outer edge of the louver.

[0027] In order to make the structure beautiful and at the same time prevent scalding and waterproofing, an outwardly protruding exhaust port is provided on the left side of the muffler outer cover, and the exhaust port is a regular polygon.

[0028] In order to reduce weight, the muffler cover and the fuel tank cover are both single-layer plastic parts formed by thermoplastic molding.

[0029] In order to guide the flow of snow and rain, a groove-shaped waterproof belt B is horizontally arranged on the right side of the muffler outer cover; a waterproof groove connected to the groove-shaped waterproof belt B is arranged on the right side of the panel; the waterproof belt A is buckled on the groove-shaped waterproof belt B and the waterproof groove.

[0030] Further describing, one end of the groove-shaped waterproof tape B overlaps or bites on one end of the waterproof groove, so that the groove-shaped waterproof tape B and the waterproof groove form a drainage channel.

[0031] In order to facilitate connection and assembly, a bolt through hole B is provided on the right side of the muffler outer cover and in the middle of the groove-shaped waterproof belt B, and the bolt through hole A cooperates with the bolt through hole B.

[0032] Due to the adoption of the above technical solution, the present invention has the advantages of clever design, simple structure and low cost. It is not only easy to assemble and improves assembly efficiency, but also effectively prevents the infiltration of snow and rain. At the same time, since it blocks the infiltration of snow and rain, it effectively prevents the corrosion and freezing of internal components by snow and rain, thereby improving the stability of machine operation. In addition, through plastic injection molding, the weight is reduced and the manufacturing difficulty is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings of the present invention are as follows:

[0034] Figure 1 It is a structural schematic diagram of the present invention;

[0035] Figure 2 for Figure 1 Rear view;

[0036] Figure 3 It is a schematic structural diagram of the fuel tank cover and the fuel tank body of the present invention;

[0037] Figure 4 It is an inner side view of the fuel tank cover of the present invention;

[0038] Figure 5 Schematic diagram of the structure of the panel and the muffler cover of the present invention;

[0039] Figure 6 for Figure 5 Side view of;

[0040] Figure 7 It is a schematic diagram of the structure of the muffler cover of the present invention;

[0041] Figure 8 for Figure 7 Left side view

[0042] Figure 9 for Figure 4 Bottom view of . DETAILED DESCRIPTION

[0043] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments. Any improvement or substitution based on the basic spirit of the present embodiment still falls within the scope of protection required by the claims of the present invention.

[0044] Example 1: Figure 1 、 2 As shown, a general-purpose gasoline engine with horizontal crankshaft output includes an engine body 1, a panel 2 and a muffler cover 3 are provided on one side of the engine body 1, a fuel tank body 35 is provided on the other side of the engine body 1, and a fuel tank cover 4 is provided on the outer sleeve of the fuel tank body 35, the panel 2 is provided on the front end surface of one side of the engine body 1, the muffler cover 3 is located above the panel 2 and the front end of the muffler cover 3 is buckled on the upper end surface of the panel 2, and the left side of the fuel tank cover 4 is buckled with the right side of the muffler cover 3 and the right side of the panel 2.

[0045] like Figure 3 、 4 As shown, the fuel tank body 35 and the fuel tank cover 4 are assembled as follows: a refueling port 36 is vertically provided on the fuel tank body 35, an oil outlet 37 is provided on the lower end surface of the fuel tank body 35, a fuel pipe 38 is provided on the oil outlet 37, the refueling port 36 passes through the upper end surface of the fuel tank cover 4, and a locking mechanism is provided on the refueling port 36. The fuel tank body 35 is fastened to the fuel tank cover 4 by the locking mechanism so that the fuel tank cover 4 bears the weight of the fuel tank body 35.

[0046] The locking mechanism includes a thread 39 provided on the outer wall of the fuel filler port 36, and a locking nut 40 is sleeved on the outer wall of the fuel filler port 36 to cooperate with the thread 39. Of course, the locking mechanism can also be a locking pin or a locking ring.

[0047] In order to facilitate the connection between the fuel tank cover 4 and the engine body 1 , fixed connecting parts are provided on the right outer wall and the left outer wall of the fuel tank cover 4 .

[0048] There are two fixed connectors arranged on the right outer wall of the fuel tank cover 4, and one fixed connector arranged on the left outer wall.

[0049] Further, the right outer wall of the fuel tank cover 4 features mounting holes A9 and B10 at either end. The left outer wall features a bolt hole A11 in the middle. This three-point connection secures the fuel tank cover 4 to the engine block 1. This makes assembly easier, more efficient, and reduces costs.

[0050] In order to facilitate the installation of the motor control box, a motor control box 27 connected to the mounting hole A9 and the mounting hole B10 is provided on the right outer wall of the fuel tank cover 4.

[0051] In order to guide the flow of snow and rain on the fuel tank cover and facilitate the lifting of the entire machine, a waterproof belt A5 is provided on the left side of the fuel tank cover 4. The waterproof belt A5 is arranged along the left outer wall to form an arch, and a side plate 6 integral with the waterproof belt A5 is vertically provided at the outer end of the waterproof belt A5; a limiting boss 28 is provided in the middle of the waterproof belt A5, the bolt through hole A11 is provided in the limiting boss 28, and a lifting ear 29 is provided on the limiting boss 28.

[0052] In order to reduce the weight of the fuel tank cover, the wall thickness of the skirt of the fuel tank cover 4 gradually decreases from top to bottom.

[0053] In order to block the heat transferred from the muffler and prevent the infiltration of snow and rain, a partition 30 is vertically provided on the left side of the fuel tank cover 4 and is integrated with the fuel tank cover 4. The partition 30 and the inner periphery of the fuel tank cover 4 are in an annular closed shape.

[0054] In order to increase the strength of the fuel tank cover 4, longitudinal and transverse reinforcement ribs B31 are provided on the top of the inner surface of the fuel tank cover 4, and the reinforcement ribs B31 near the bend of the inner surface of the fuel tank cover 4 extend to the inner surface of the skirt of the fuel tank cover 4.

[0055] In order to limit the position of the oil outlet pipe on the oil tank, a plate 32 is provided on the inner wall of the front end surface of the oil tank cover 4 . The plate 32 and the inner wall of the front end surface form a limiting groove 33 , and the oil pipe 38 is located in the limiting groove 33 .

[0056] In order to simplify manufacturing and reduce costs, the fuel tank body 1 is blow-molded.

[0057] like Figure 5 、 6 As shown, in order to facilitate the connection between the muffler cover and the panel and effectively prevent the infiltration of snow and rain, the muffler cover 3 is snapped on the upper end surface of the panel and connected by bolts 13; a heat insulation plate 15 connected to the carburetor 14 is vertically arranged on the inner side of the panel 2, and the inner side of the panel 2, the inner side of the heat insulation plate 15 and the outer side of the front end of the muffler cover 3 form a space for protecting the carburetor 14.

[0058] The heat shield 15 includes a vertically arranged straight plate 16 , and an inclined plate 17 integrally formed with the straight plate 16 is arranged on the upper portion of the straight plate 16 . The straight plate 16 is connected to the carburetor 14 ; the inclined surface of the inclined plate 17 faces the muffler cover 3 .

[0059] In order to further prevent the infiltration of rain and snow, a semi-enclosed baffle 18 for shielding the front side and the right side is provided on the inner wall of the muffler cover 3 .

[0060] Furthermore, in order to improve the waterproof performance and guide the flow of snow and rain, the lower end of the semi-enclosed baffle 18 extends downward and is located above the insulation board 15, and the lower end of the semi-enclosed baffle 18 is lower than the upper end surface of the insulation board 15.

[0061] Further description, a snap cover 19 that is integrated with the muffler outer cover 3 is provided at the front end of the muffler outer cover 3; the panel 2 includes an upper end face 34 and an inclined front end face 20, and a step 21 is provided at the junction of the front end face 20 and the upper end face 34, and the snap cover 19 is snapped onto the step 21.

[0062] In order to allow rain and snow to flow down smoothly, the front end surface of the buckle cover 21 has a slope 22. The buckle cover 19 is buckled on the step 21 and the slope 22 forms the same slope as the front end surface.

[0063] like Figure 7 、 8 As shown in Figures 9 and 9 , in order to improve the heat dissipation effect of the muffler outer cover 3 , a shutter 23 is provided on the upper end surface of the muffler outer cover 3 , and heat dissipation ribs 24 are vertically provided on the left side, right side and rear end surface of the muffler outer cover 3 .

[0064] In order to improve the strength of the muffler outer cover 3 , a reinforcing rib A25 surrounding the louver 23 is provided on the upper end surface of the muffler outer cover 3 and at the outer edge of the louver 23 .

[0065] In order to make the structure beautiful and to prevent scalding and water from entering, an outwardly protruding exhaust port 26 is provided on the left side of the muffler outer cover 3 , and the exhaust port 26 is a regular polygon.

[0066] In order to reduce weight, the muffler cover 3 and the fuel tank cover 4 are both single-layer plastic parts formed by thermoplastic molding.

[0067] In order to guide the flow of snow and rain, a groove-shaped waterproof belt B7 is horizontally arranged on the right side of the muffler outer cover 3; a waterproof groove 8 connected to the groove-shaped waterproof belt B7 is arranged on the right side of the panel 2; the waterproof belt A5 is buckled on the groove-shaped waterproof belt B7 and the waterproof groove 8.

[0068] To further describe, one end of the groove-shaped waterproof tape B7 is overlapped or engaged with one end of the waterproof groove 8, so that the groove-shaped waterproof tape B7 and the waterproof groove 8 form a drainage channel.

[0069] In order to facilitate connection and assembly, a bolt through hole B12 is provided on the right side of the muffler outer cover 3 and in the middle of the groove-shaped waterproof belt B7, and the bolt through hole A11 matches the bolt through hole B12.

Claims

1. A general-purpose gasoline engine with a horizontal crankshaft output, comprising an engine body (1), a panel (2) and a muffler cover (3) provided on one side of the engine body (1), a fuel tank body (35) provided on the other side of the engine body (1), and a fuel tank cover (4) provided on the outer shell of the fuel tank body (35), wherein: The panel (2) is arranged on the front end surface of one side of the engine body (1); the muffler cover (3) is located above the panel (2) and the front end of the muffler cover (3) is buckled on the upper end surface of the panel (2); the left side of the fuel tank cover (4) is buckled with the right side of the muffler cover (3) and the right side of the panel (2); A refueling port (36) is vertically provided on the fuel tank body (35), an oil outlet (37) is provided on the lower end surface of the fuel tank body (35), and an oil pipe (38) is provided on the oil outlet (37). The refueling port (36) passes through the upper end surface of the fuel tank cover (4), and a locking mechanism is provided on the refueling port (36). The fuel tank body (35) is fastened to the fuel tank cover (4) through the locking mechanism so that the fuel tank cover (4) bears the weight of the fuel tank body (35); The muffler cover (3) is fastened to the upper end surface of the panel and connected by bolts (13); a heat shield (15) connected to the carburetor (14) is vertically arranged on the inner side of the panel (2); the inner side of the panel (2), the inner side of the heat shield (15) and the outer side of the front end of the muffler cover (3) form a space for protecting the carburetor (14); A shutter (23) is provided on the upper end surface of the muffler outer cover (3), and heat dissipation ribs (24) are vertically provided on the left side, right side and rear end surface of the muffler outer cover (3); and reinforcing ribs A (25) surrounding the shutter (23) are provided on the upper end surface of the muffler outer cover (3) and at the outer edge of the shutter (23).

2. The universal gasoline engine with horizontal crankshaft output according to claim 1, characterized in that: The locking mechanism comprises a thread (39) arranged on the outer wall of the fuel filling port (36), and a locking nut (40) matched with the thread (39) is sleeved on the outer wall of the fuel filling port (36).

3. The universal gasoline engine with horizontal crankshaft output according to claim 2, characterized in that: Fixed connecting pieces are provided on the right outer wall and the left outer wall of the oil tank outer cover (4).

4. The universal gasoline engine with horizontal crankshaft output according to claim 3, characterized in that: There are two fixed connecting parts arranged on the right outer wall of the oil tank outer cover (4), and one fixed connecting part arranged on the left outer wall.

5. The universal gasoline engine with horizontal crankshaft output according to claim 4, characterized in that: The fixing connection member on the right outer wall of the oil tank cover (4) is a mounting hole A (9) and a mounting hole B (10) arranged at both ends of the right outer wall; the fixing connection member on the left outer wall is a bolt through hole A (11) arranged in the middle of the left outer wall.

6. The universal gasoline engine with horizontal crankshaft output as claimed in claim 5, characterized in that: A motor control box (27) connected to the mounting hole A (9) and the mounting hole B (10) is provided on the right side outer wall of the oil tank cover (4).

7. The universal gasoline engine with horizontal crankshaft output as claimed in claim 6, characterized in that: A waterproof belt A (5) is provided on the left side of the fuel tank outer cover (4), and the waterproof belt A (5) is arranged along the left outer wall to form an arch shape. A side plate (6) integral with the waterproof belt A (5) is vertically provided at the outer end of the waterproof belt A (5); a limiting boss (28) is provided in the middle of the waterproof belt A (5), and the bolt through hole A (11) is provided in the limiting boss (28).

8. The universal gasoline engine with horizontal crankshaft output according to claim 7, characterized in that: The wall thickness of the skirt of the fuel tank outer cover (4) gradually decreases from top to bottom.

9. The universal gasoline engine with horizontal crankshaft output as claimed in claim 8, characterized in that: A partition plate (30) is vertically arranged on the left side of the fuel tank outer cover (4) and is integrated with the fuel tank outer cover (4). The partition plate (30) and the inner periphery of the fuel tank outer cover (4) are in a ring-shaped closed shape.

10. The universal gasoline engine with horizontal crankshaft output as claimed in claim 9, characterized in that: The top of the inner surface of the fuel tank cover (4) is provided with longitudinally and transversely arranged reinforcing ribs B (31), and the reinforcing ribs B (31) near the bend of the inner surface of the fuel tank cover (4) extend to the inner surface of the skirt of the fuel tank cover (4).

11. The universal gasoline engine with horizontal crankshaft output as claimed in claim 10, characterized in that: A plate (32) is provided on the inner wall of the front end surface of the oil tank outer cover (4), and a limiting groove (33) is formed between the plate (32) and the inner wall of the front end surface. The oil pipe (38) is located in the limiting groove (33).

12. The universal gasoline engine with horizontal crankshaft output according to claim 11, characterized in that: The oil tank body (35) is blow-molded.

13. The universal gasoline engine with horizontal crankshaft output according to claim 12, characterized in that: The heat insulation plate (15) comprises a vertically arranged straight plate (16), an inclined plate (17) formed integrally with the straight plate (16) is arranged on the upper portion of the straight plate (16), and the straight plate (16) is connected to the carburetor (14); the inclined surface of the inclined plate (17) faces the muffler outer cover (3).

14. The universal gasoline engine with horizontal crankshaft output as claimed in claim 13, characterized in that: The inner wall of the muffler outer cover (3) is provided with a semi-enclosed baffle (18) for shielding the front side and the right side.

15. The universal gasoline engine with horizontal crankshaft output according to claim 14, characterized in that: The lower end of the semi-enclosed baffle (18) extends downward and is located above the heat insulation plate (15), and the lower end of the semi-enclosed baffle (18) is lower than the upper end surface of the heat insulation plate (15).

16. The universal gasoline engine with horizontal crankshaft output as claimed in claim 15, characterized in that: The front end of the muffler outer cover (3) is provided with a buckle cover (19) which is integral with the muffler outer cover (3); the panel (2) comprises an upper end surface (34) and an inclined front end surface (20); a step (21) is provided at the junction of the front end surface (20) and the upper end surface (34), and the buckle cover (19) is buckled on the step (21).

17. The universal gasoline engine with horizontal crankshaft output according to claim 16, characterized in that: The front end face of the buckle cover (19) has a bevel (22), the buckle cover (19) is buckled on the step (21), and the bevel (22) of the buckle cover (19) and the front end face (20) of the panel (2) form the same bevel.

18. The universal gasoline engine with horizontal crankshaft output as claimed in claim 17, characterized in that: An outwardly protruding exhaust port (26) is provided on the left side of the muffler outer cover (3), and the exhaust port (26) is a regular polygon.

19. The universal gasoline engine with horizontal crankshaft output according to claim 18, characterized in that: The muffler outer cover (3) and the fuel tank outer cover (4) are both single-layer plastic parts formed by thermoplastic molding.

20. The universal gasoline engine with horizontal crankshaft output as claimed in claim 19, characterized in that: A groove-shaped waterproof belt B (7) is horizontally provided on the right side of the muffler outer cover (3); a waterproof groove (8) connected to the groove-shaped waterproof belt B (7) is provided on the right side of the panel (2); and the waterproof belt A (5) is buckled onto the groove-shaped waterproof belt B (7) and the waterproof groove (8).

21. The universal gasoline engine with horizontal crankshaft output according to claim 20, characterized in that: One end of the groove-shaped waterproof belt B (7) is overlapped or engaged with one end of the waterproof groove (8), so that the groove-shaped waterproof belt B (7) and the waterproof groove (8) form a drainage channel.

22. The universal gasoline engine with horizontal crankshaft output as claimed in claim 21, characterized in that: A bolt through hole B (12) is provided on the right side of the muffler outer cover (3) and in the middle of the groove-shaped waterproof belt B (7), and the bolt through hole A (11) is matched with the bolt through hole B (12).

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