JPH0677482B2 - Riding lawn mower - Google Patents

Description

The present invention relates to a riding lawn mower as a small and simple type.

(Prior Art) A power lawnmower that cuts grass and lawn by rotating a cutter with engine power has been conventionally known, and a walking type lawn mower is provided with four wheels as in, for example, No. Shokai 59-156432. A cutter housing accommodating the cutter is provided between them, an engine is arranged on the housing, and the cutter is rotationally driven by engine power to mow grass and lawn. This example is a type that does not have a drive wheel and is moved while pushing the handle, and there is also a type that has a drive wheel.

As a riding type, the actual model No. 61-28328 is known, and this type of conventional type is a small tractor type with four wheels, and the engine is mounted on the front part of the frame, as is clear from this example.
A cutter and a cutter housing are provided under the vehicle body, and the engine is covered with a bonnet, similar to a small car.

(Problems to be Solved by the Invention) The above-mentioned conventional walking type grips the handle in a bent posture and moves the lawn mower, which makes it easy to get stuck, and thus the grass or lawn surface having a large area to some extent. When performing the mowing work, the operator is burdened.

Although the above-mentioned walk-behind lawnmower is low in cost, it has the above disadvantages.On the other hand, the riding lawn mower becomes large like a small tractor or a small car, and in particular, an engine is mounted on the vehicle body like a tractor or a car. Since it surrounds the outside with an outer plate, the outer shape becomes large, so it is not suitable for small areas of grass and lawn mowing, and because it is as described above, the cost per unit must be extremely high.

The present invention has been made in view of the problems as described above, and the purpose thereof is to make it possible to mow grass and lawn mowing by riding in a small size and a simple format, and a dimension close to a walking type while being a riding type, An object of the present invention is to provide a riding lawn mower that has a simple structure and enables an operator to easily and easily mow and lawn.

(Means for Solving Problems) As means for solving the above problems, a front wheel is provided in the front part of a substantially arch-shaped frame in side view, a rear wheel composed of two left and right wheels is provided in the rear part, and the front wheel is A steering bar handle is provided at the front of the frame, a saddle type seat is provided at the upper rear part of the frame, and a lawn mowing cutter and a cutter housing for covering the lawn are provided between the front and rear wheels below the frame. This is because an engine, which is a drive source for driving the cutter and a drive source for traveling, is integrally provided, and the engine is integrally provided at the cutter housing.

(Operation of the above means) According to the above means, the frame is arch type, the wheels are arranged in the front and rear, the cutter and the cutter housing are arranged between them, the handle is provided in the front part, and the seat is provided in the rear part. A riding lawn mower can be constructed with dimensions that are not so different from those of a small scooter.

(Embodiment) Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a front perspective view of the lawnmower 1, FIG. 2 is a side view of the same appearance, FIG. 3 is a vertical side view, and FIG. 4 is an explanatory plan view.

The frame 2 of the lawn mower 1 has a substantially concave concave arm shape when viewed from the side. As shown in Fig. 3, the front and middle parts are loosely tilted forward and downward, and the rear part is a backbone-shaped front made of a single pipe material. It comprises a member 3 and a rear member 4 of a front (back) face view type which hangs to the rear left and right of the front member 3. A head tube 5 is fixedly attached to a front end of a front half 3a composed of a front portion and a middle portion of the front member 3 which are gently inclined forward and downward, and a handle post 6 is erected on the head tube 5 so as to be slightly inclined upward, and above the handle post 6. A bar type handle 7 is provided, and a shaft portion 7a of the handle 7 is connected to a steering shaft 8 which can pass through the handle post 6 vertically. A box-shaped bracket 9 is provided at the front of the front member 3 to surround the lower portion of the head tube 5, and the knuckles 11 and 11 of the left and right front wheels 10 and 10 arranged on the left and right of the bracket 9 and the steering shaft 8 are connected to the rod 12,
Each of them is connected by 12, and steering of the steering wheel 7 to the left and right is transmitted to the front wheels 10, 10 via the shaft 8 and the rods 12, 12.
Therefore, the front wheels 10, 10 form steering wheels.

The rear half 3b of the front member 3 extends rearward in a substantially horizontal direction, and the seat 13 is arranged on the rear half 3b. The horizontal portion 4a above the rear member 4 in the front (back) view is a cross member etc. on the rear half 3b. The left and right leg parts 4b, 4 which are connected via
An axle 14 is rotatably supported horizontally between the lower parts of b. Left and right rear wheels 15 and 15 forming drive wheels are attached and supported to both ends 14a and 14a led out of the leg portions 4b and 4b. Therefore, the present embodiment is in the form of a four-wheeled vehicle. A cover 16 is provided between the upper portions of the left and right leg portions 4b, 4b of the front member 3 and the rear member 4 to cover the outside.

Above the frame 2, between the front and rear wheels 10, 10, 15 and 15, a flat disk-shaped inverted deep dish cutter housing 17 which is open downward is provided, and an upper wall 17a of the cutter housing 17 is provided. Boss 17b in the center
A cutter shaft 18 provided with is rotatably hung vertically via a bearing 20, and a cutter 19 is attached and held at the lower end of the shaft 18. As shown in FIG. 3, the cutter housing 17 is provided with an annular groove 17c which corresponds to the width of the cutter blade portion 19a in the peripheral portion and which is recessed upward. The groove 17c is located on one rear side, that is, as shown in FIG. If the rotation direction of 19 is clockwise with the shaft 18 as the center in the plan view of FIG. 4, it is connected to the discharge duct 21 extending rearward in this direction, and the front portion 21a of the duct 21 is in the cutter rotation direction of the groove 17c. It is connected to the open rear part of the discharge guide part 17d extending rearward and upward, the middle part 21b is passed through the space between the left and right leg parts 4b, 4b of the rear frame 4 and tilted upward, and the rear part of the duct 21. The grass clippings discharge port 21c is tilted rearward so as to communicate with and open the glass bag 22 attached to the rear of the rear frame 4.

An engine 23 is mounted and fixed on the front half of the cutter housing 17, and the engine 23 is a vertical engine with a crankshaft vertically installed, and the output shaft 24 hanging from the lower crankcase 23a is lowered one step below the upper wall of the groove 17c. Upper central wall 1
Face up to 7a. The upper part of the engine 23 is covered with a cover 25, a fuel tank 26 is arranged in the rear part of the cover 25, a recoil starter knob 27 is arranged on the right side of the upper part of the cover 25, and the recoil starter knob 27 is a front member of the frame. It is provided in the lower right of the middle part of the front half of 3 so as to face the right rear, and an operator can perform a starting operation by sitting on the seat, extending the right hand downward, and pulling the knob 27 to the right rear. I did it.

On one of the left and right leg portions 4b, 4b of the frame rear member 4 described above, for example, on the left side, a bracket 28 is provided so as to project inwardly, and a mission case 29 is mounted and supported on the bracket 28. The above-mentioned engine 23 is provided separately and separately. An output shaft 30 parallel to the axle 14 is provided on the upper part of the mission case 29, and a pulley 31 is fixed to the output shaft 30, while a pulley 32 is fixed to the axle 14 and a belt 33 is wound between the pulleys 31 and 32 to transmit the mission. Is transmitted to the axle 14 to drive the rear wheels 15,15.

The power transmission system from the engine 23 to the cutter 19 and the transmission case 29 is as described below.A pulley 34 is fixed to the lower end of the output shaft 24 of the engine 23, and a pulley 35 is attached to the upper end of the cutter shaft 18 described above. Fixed and mission case 29
A pulley 37 is fixedly installed on an input shaft 36 that hangs downward, a belt 38 is wound around these pulleys 34, 35, 37, and a guide pulley 39 and a tension pulley 40 are laid over a part of the belt 38 to extend the pulley 34. The outputs can be surely transmitted to the pulleys 35 and 37, and the pulleys 39 and 40 are supported on the cutter housing 17. Thus, the cutter 19 and the rear wheels 15 and 15 are driven.

By the way, on the left and right sides of the cutter housing 17, there are provided steps 41, 41 for placing a foot of an operator sitting on the seat 13.

The cutter housing 17 is provided so as to be vertically movable with respect to the frame 2, that is, the cutting height can be adjusted.

In the embodiment, as shown in FIG. 2, stays 42 are provided on the left and right rear sides of a bracket 9 suspended from the front end of the front member 3 of the frame 2, and a middle point of a substantially L-shaped link 43 is pivotally attached thereto.
On the other hand, the stays 44 are provided on the left and right above the front part of the cutter housing 17, and the upper ends of the stays 44 are pivotally attached 43c to one end 43b of the link 43. A stay 45 is extended forward from the left and right leg portions 4b, 4b of the frame rear member 4, and the middle point of the T-shaped link 46 is pivotally attached to this, and the tip of one of the three legs 46b of the link 46. Is pivotally attached 46c to the upper ends of stays 47 provided on the left and right of the rear of the cutter housing 17.

On one of the left and right leg portions 4b, 4b of the frame rear member 4, that is, on the left side in the embodiment, a guide plate 48 provided with a guide elongated hole 48a such as a shift pattern is projected on the outer surface of the middle upper portion, and an operating lever 49 is attached thereto. The lever 49 is vertically passed, and a base portion below the guide plate 48 is pivotally attached 49a to the leg 4b side, and a knob 49b is provided at a tip portion protruding upward from the guide plate 48. The lower end of the operating lever 49 is pivotally attached 50b to the rear end 50a of the linear link 50, and the link 50
The front end 50c is pivotally attached 50d to the tip of the piece 46d extending above the T-shaped link 46 described above, and the piece 46e extending downward of the link 46 and the other end 43d of the L-shaped link 43 described above in the front portion. Are connected with a rod 51,
Both ends of the rod 51 have ends 43d of the link 43 and a piece 46e of the link 46.
And 51a and 51b, respectively.

In the above, the operation lever 49 is disengaged from the engaging portion of the elongated hole 48a of the guide plate 48, whereby the lever 49 can swing back and forth, and the lever 49 swings with the pivotal portion 49a as a fulcrum by forward and backward operations. Then, the T-shaped link 46 via the link 50 is the midpoint 46a.
Swings around as a fulcrum, and the rear part of the cutter housing 17 moves up and down. On the other hand, the link 46 is connected to the link 43 via the rod 51, so that the swing of the link 46 is transmitted to the link 43 via the rod 51, and the link 43 swings about the midpoint 43a as a fulcrum. The front part of the cutter housing 17 moves up and down by the same amount in cooperation with the rear part. Thus, the cutting height of grass and grass can be adjusted.

In the above lawnmower 1, the operator sits on the seat 13, puts his / her feet on the steps 41, 41 and grips the bar handle 7, and therefore operates like a motorcycle, and pulls the recoil starter knob 27 to the right rear. Start the engine 23, and the cutter 19 is rotated by the power of the engine 23 to mow the lawn, while the drive wheel 1
5, 5 are driven by the engine 23, and the cutting height is adjusted by operating the lever 49 as described above, and the driving operation is exactly the same as that of the two-wheeled vehicle.

FIG. 5 shows a modification of the above embodiment. In this embodiment, the output of the engine 23 to the mission case 29 is output by the drive shaft 138. Since the cutter housing 17 moves up and down, the drive shaft 138 and the mission 29 are moved. The input shaft 136 of is connected by a universal joint 152. Since other parts are the same as those in the above embodiment, the same parts are designated by the same reference numerals,
Detailed description is omitted.

FIG. 6 shows a second embodiment of the present invention.

The above-described embodiment is a four-wheel vehicle type having two front wheels, but this embodiment is a one-wheel three-wheel vehicle type.

An inverted U-shaped fork member 209 is hung on the front part of the frame, and a front wheel 210 of one wheel is movably supported on the fork member 209, and the fork member 209 is connected to a steering shaft through which the handle post 6 can pass vertically. However, the steering wheel 7 can be steered to move the front wheels 210 left and right to steer the vehicle. In this embodiment, the bracket 242 is hung from the frame side. Are denoted by the same reference numerals and detailed description thereof is omitted.

(Advantages of the Invention) As is apparent from the above, according to the present invention, the frame is arched, the front and rear wheels are provided, the cutter and the cutter housing for covering the cutter are provided between the front and rear wheels, and the saddle-mounted seat is provided on the frame. Since the handle is a bar type and the cutter housing supports the engine, the lawn mower is constructed.
A riding type lawnmower can be obtained with a size that is not much different from a small, simple motorcycle, and a riding type lawn mower can be obtained with a size that is not significantly different from a conventional walk-type lawn mower, which facilitates lawn mowing work. In addition, conventional large-sized riding lawn mowers can easily perform excessive lawn lawn mowing, and the lawn mower has an arched frame and the engine is installed in the cutter housing as in the walk type, so the frame structure is simplified and the walk type lawn mower is used. The lawnmower for riding can be provided at a cost not much different from that of the machine, and there are great advantages such as obtaining a lawn mower for riding which is small in size, low in price and excellent in workability, which has never been achieved.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a front perspective view of a riding lawn mower according to the first embodiment, FIG. 2 is a side view of the same, FIG. The figure is the same explanatory plan view,
FIG. 5 is a side view of the modified embodiment, and FIG. 6 is a front perspective view of the second embodiment. In the drawing, 1 is a lawn mower, 10, 15, 210 are front and rear wheels, 2 is a frame, 7 is a handle, 13 is a seat, 17 is a cutter housing, 19 is a cutter, and 23 is an engine.

Claims (2)

[Claims] 1. A side view substantially arch-shaped frame is provided with a front wheel at a front portion thereof, a rear wheel is provided at a rear portion thereof with two left and right wheels, a bar handle for steering the front wheel is provided at a front portion of the frame, and a rear upper portion of the frame is provided. A saddle type seat is provided, and a lawn mowing cutter and a cutter housing that covers the same are provided between the front and rear wheels below the frame, and the cutter housing is for driving the cutter.
A riding lawn mower, which is integrally provided with an engine that forms a power source for traveling. 2. The engine is integrated to cover the cutter,
The height of the cutter housing holding the cutter housing is adjustable, and the riding lawn mower according to claim 1 is provided.