JPS6147481B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a walk-behind grass cutter, and an object of the present invention is to prevent cut grass from scattering with simple improvements, and to simplify the transmission structure for the cutter. With the goal.

Next, embodiments of the present invention will be described in detail based on the drawings.

An inverted L-shaped transmission case 1 consisting of a first case part 1a in the horizontal direction and a second case part 1b in the vertical direction, an engine E is mounted on the upper part of the front end side of the first case part 1a, and an engine E is mounted on the rear side. The operating handle 2 is extended, and on the other hand, an axle 4 with left and right wheels 3, 3 attached is mounted on the lower end side of the second case portion 1b, and power is taken out by directing the engine E vertically downward. A shaft 5 is provided protrudingly, and a mowing cutter 6 is interlocked and connected to the power take-off shaft 5, and the power from the engine E is transmitted to the left and right wheels 3, 3 and the power take-off shaft 5.
The walk-behind mower is constructed so as to transmit the information to the user.

A gear-type two-stage reduction mechanism 7 is installed inside the first case portion 1a, and is concentric with the output shaft 8 of the engine E via a main clutch 9, with its lower end also serving as the power take-off shaft 5. The configured input shafts 10 are interlocked and connected, and power is transmitted from the input shafts 10 to the axle shaft 4 via the speed reduction mechanism 7 and the bevel gear mechanism 11.

A rotary shaft 12 to which the cutter 6 is rotatably attached is interlocked and connected to the power take-off shaft 5 by screwing concentrically in a direction opposite to the direction of rotation of the cutter. cylindrical case 13 that covers
The upper end is bolted to the first case part 1a, and a reinforcing stay 14 is attached across the cylindrical case 13 and the second case part 1b. 3, and the second case part 1
b, so as to prevent the cut grass from scattering to the outside by catching the cut grass on the inner surfaces of the wheels 3, 3 and the vertical case portion 1 of the inverted L-shaped transmission case 1. It is configured.

The handle 2 is pivotally connected to the rear lower end side of the second case portion 1b so as to be swingable around the horizontal axis P, and has a wavy shape on a bracket 15 pivotally connected to the rear upper end side of the second case portion 1b. The handle 2 is attached so that the connecting and fixing position can be changed by engaging with the locking part 18 and tightening the bolt, and the angle at which the handle 2 is attached to the case 1 can be adjusted as the fixing position is changed.

The left and right wheels 3, 3 are detachably attached to the axle 4, and a working device such as a rotary tiller is attached in place of the wheels 3, 3, and the bracket 1
5, as shown by the two-dot chain line in FIG.
6 can be installed to perform various tasks other than mowing, such as plowing.

In the figure, 17 is a fuel tank.

In summary, the walk-behind mower according to the present invention has the following features:
An engine E is provided in front of the left and right wheels 3, 3, a vertical power take-off shaft 5 is provided protruding below the engine E, and a mowing cutter 6 is integrally attached to the power take-off shaft 5. The rear half of the cutter 6 is arranged between the left and right wheels 3, 3 in the longitudinal direction of the aircraft, and at the rear of the cutter 6, there is a horizontal case portion in which a speed reduction mechanism 7 interlocked with the power take-off shaft 5 is installed. 1a, and a vertical case portion 1b having the left and right wheels 3, 3 attached to the lower end thereof. , is located on the outer periphery of the cutter 6, and is characterized in that the lower end of the vertical case portion 1b is located close to the cutter 6.

That is, by surrounding the left and right sides of the cutter 6 with a pair of left and right wheels 3, and by surrounding the rear of the cutter 6 with the wheel transmission case 1, a rational arrangement of the wheels and the transmission case is adopted. However, the left and right wheels 3, prevent the cut grass from being scattered outside by the driving force of the cutter 6 itself.
3 and the transmission case 1, and by providing a special member such as a cover, it has become possible to suppress the scattering of cut grass by simple improvements.

Moreover, since the cutter 6 is directly driven by the engine E, for example, the cutter 6 is driven directly by the engine E.
Compared to the case where the cutter 6 and the cutter 6 are not directly connected and are driven from the transmission case 1 via a speed increase mechanism, a special speed increase mechanism is not required, and the transmission structure for the cutter is simplified.

[Brief explanation of the drawing]

The drawings show an embodiment of a walk-behind mower according to the present invention, in which FIG. 1 is an overall side view, FIG. 2 is an overall schematic plan view, and FIG. 3 is a partially cutaway side view of important parts. 1...Transmission case, 1a...Horizontal case part,
1b...Vertical case part, 3...Wheel, 5...Power take-off shaft, 6...Cut, 7...Reduction mechanism, E...
…engine.

Claims (1)

[Claims] 1 Engine E is provided in front of the left and right wheels 3, 3,
A vertical power take-off shaft 5 is provided protruding below the engine E, and a mowing cutter 6 is integrally attached to the power take-off shaft 5. , 3, and behind the cutter 6 there is a horizontal case part 1a in which a deceleration mechanism 7 interlocked with the power take-off shaft 5 is installed, and the left and right wheels 3, 3 are installed at the lower end of the horizontal case part 1a. Side view inverted L consisting of the attached vertical case portion 1b
The vertical case portion 1b of the letter-shaped transmission case 1 is
is located between the left and right wheels 3, 3 and on the outer periphery of the cutter 6, and the vertical case portion 1
A walking mower in which the lower end of b is placed close to the cutter 6.