JPH0416123B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a combination structure of a housing and an engine cover in a lawn mower.

(Prior Art) In a walk-behind powered lawn mower, an engine serving as a power source is mounted inside a housing, and the engine drives a cutting blade and the like. Generally, an opening is formed in the upper surface of the housing, and the inside of the housing, that is, the engine and the like can be viewed through this opening. Therefore, an engine cover is usually placed above the housing.

(Problem to be solved by the invention) In the above-mentioned combined structure of the lawn mower's housing and engine cover, when it rains or the cut grass flies up, these things get into the engine room. There is a risk that this may occur.

Therefore, the present invention provides a lawn mower that can keep the inside of the engine room clean.

(Means for Solving the Problems) Accordingly, the present invention provides a lawn mower in which an engine cover is provided in a housing. A space is provided between the housing and the front upper end of the housing, and the upper opening of the housing is tilted forward, and the opening of the housing is inside the opening of the engine cover, and both sides of the opening edge of the housing are provided. The ribs are formed in a series from the front to the rear.

(Function) According to the above structure, the strength of the opening, which is the mating part on the housing side, can be increased by the ribs, and rain, etc. that falls on the top surface of the engine cover can be transmitted through the outer surface and the upper side surface of the housing. Since it is discharged to the outside, it is possible to keep the inside of the engine room clean at all times.

(Embodiment) A preferred embodiment of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a perspective view showing the external appearance of a walking-type power lawn mower 1. FIG. Four wheels, left and right front wheels 3, 3, and rear wheels 4, 4 are provided at the four corners of a cutter housing 2 molded from synthetic resin, and an engine 5 is provided in the center of the housing 2, which is covered with an engine cover 6. It is being said. Handles 7 extend upwardly from the rear left and right sides of the housing 2, and a grass bag 8 for storing cut grass is attached to the rear of the housing 2.

The internal structure of the cutter housing 2 is as shown in FIGS. 2 and 3. The cutter housing 2 includes a cylindrical peripheral wall 2a, the lower part of which is open, and the upper end of the peripheral wall 2a is connected to the top wall 2b. The center portion 2c is formed one step lower. The output part 9a of the vertical crankshaft 9 of the vertical engine 5 mounted on the central part 2c is suspended through a circular opening 10, and a cutter blade 11 is fixedly installed at the lower end of the output part 9a. A discharge fan 12 is fixed coaxially thereon. This discharge fan 12 is surrounded by a fan guard 13, which is an inner cylinder formed integrally with the top wall 2b.

In the engine 5, the cylinder 5a is oriented horizontally and the crankshaft 9 is oriented vertically, and a cooling fan 14 is fixedly installed at the upper end of the crankshaft 9.
The upper circumference of the engine 5 is covered with an engine cover 6, and a recoil starter pulley 15 is provided above the center of the engine cover 6.

The lawn mower 1 having the above configuration performs lawn mowing work by rotating the cutter blade 11 in a horizontal plane by the hanging output part 9a of the engine 5, and also has a discharging fan 1 provided coaxially.
2 is rotated to generate wind to discharge the cut grass, and the air is passed through the opening 10 to the fan guard 1.
3 and transfers the grass to the discharge duct section 16 at the rear of the housing 2. In addition, 17 in Figure 2
is an intermediate shaft for driving the rear wheel 4 driven by the crankshaft 9.

In the above, an opening 2A is formed on the upper surface of the housing 2, and the inside of the engine room can be viewed from this opening 2A. The lower part of the engine cover 6 is opened, and a space S is provided between the opening 6A and the front upper end of the housing 2, and the engine cover 6 is placed over the engine 5 through the opening 6A. Therefore, the upper opening 2A of the housing 2 and the engine cover 6A have a mating structure.

In such a combined structure, as shown in FIG. 3, the right side edge 18 of the opening 2A and the right side edge 19 of the engine cover 6 have contours that overlap, and the edge 18 of the opening 2A overlaps the engine cover 6. It is formed so as to be located inside the edge 19 of. Therefore, with such a mating structure, the opening 2A of the housing 2 is located inside the lower opening 6A of the engine cover 6, as shown in FIG.

Reference numeral 20 denotes a rib formed along the edge 18 of the opening 2A, and the rib 20 is raised so as to enter into the engine cover 6.

According to the above configuration, for example, when it rains, rainwater that falls on the outer surface of the engine cover 6 is transmitted to the outer wall surface of the engine cover 6 and flows down to the upper surface portions 2B, 2B on both sides of the housing 2. is transmitted to the outside. In this way, rainwater does not enter the engine room 21 through the opening 2A of the housing 2, and the engine room can always be kept clean.

Further, by providing the ribs 20 in the opening 2A, the strength of the housing 2 can be maintained high. Furthermore, when fuel is injected into the fuel supply port 25, fuel leaking to the outside of the engine cover 6 can be prevented from entering the engine room or the cutter housing.

In FIG. 2, 22 indicates the position viewed from the side of the upper surface portion 2B, and 23 indicates the position viewed from the side of the opening 2A. Further, in FIG. 3, 24 indicates the position of the fuel tank, and 25 indicates the position of the fuel supply port. 2 more
6 is a housing 2 provided with a cutter blade 11;
This is the bulge. It is clear from FIG. 1 that the upper surface portion 2B is formed as the upper wall of the bulging portion 26.

(Effect of the invention) As is clear from the above explanation, according to the present invention,
In the structure where the top opening of the housing and the engine cover are combined, the engine cover is placed inside the opening and ribs are provided at required locations, so that fuel leaking outside the engine cover during rain or fuel supply is prevented from flowing into the engine compartment. It can be discharged to the outside without intrusion, and the strength of the upper surface of the housing can be increased. Furthermore, since the intake port for cooling the engine is provided in front of the engine and the housing, dirt such as grass clippings and dust are less likely to enter from the front. Therefore, clean air can be supplied to the engine, and since the front opening is made wider, the engine can be sufficiently cooled, and the durability of the engine can also be improved.

[Brief explanation of drawings]

FIG. 1 is an external perspective view of a lawn mower according to the present invention, FIG. 2 is a vertical cross-sectional view of the main parts showing the internal structure of the lawn mower, and FIG. 3 is a plan view of the main parts showing the relationship of the mating structure. In the drawing, 1 is a lawn mower, 2 is a cutter housing,
3 is the front wheel, 4 is the rear wheel, 5 is the engine, 6 is the engine cover, 11 is the cutter blade, 12 is the discharge fan, 2A is the upper opening of the housing, 6A is the opening of the engine cover, 20 is the rib. be.

Claims (1)

[Claims] 1 Equipped with a cutter blade and an engine that rotates the cutter blade in the housing,
In a lawn mower in which an engine cover is attached to an upper part of a housing, a space is provided between a lower opening in front of the engine cover and a front upper end of the housing among the openings where the housing and the engine cover fit together. At the same time, the upper opening of the housing is inclined forward, and the rear part of the opening of the housing is inside the rear part of the opening of the engine cover, and a rib is formed in a series from both ends of the opening edge of the housing to the rear. A combined structure of a housing and an engine cover in a lawn mower, characterized in that the housing and engine cover are formed into a shape.