JPH0633778Y2 - Lawn mower cutter deck - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a lawn mower such as a riding type lawn mower, and particularly to a cutter deck in a rotary lawn mower.

[Conventional technology]

Conventionally, for example, in a riding lawn mower, a cutter deck accommodating a rotary cutting blade is arranged under a traveling machine body such as a tractor, and the cutter deck is slid on the lower surface of the cutter deck following the unevenness of the lawn surface. A device having a pair of left and right bar-shaped sleds for guiding is known.

[Problems to be solved by the device]

However, conventionally, it is general that the above-mentioned left and right gaps are arranged parallel to the traveling direction, that is, the front-back direction of the cutter deck. Therefore, for example, when performing lawn mowing work on a sloping ground such as a golf course in a direction perpendicular to the direction of inclination, the lawn mowing work is performed in a state where the machine body leans to either the left or right and the cutter deck leans to the left or right. Therefore, the sled tends to slide on the slope and the cutter deck tends to move to the lower side of the slope, which makes it difficult to move the cutter deck straight no matter how the handle is operated. Therefore, there are problems such as uncut and uneven cutting. Further, in a lawnmower in which a cutter deck is attached to the lower part of the traveling machine body by a link or the like, there is a possibility that the link or the like may be deformed or broken due to an unreasonable force.

The present invention aims to solve the above problems with a simple configuration.

[Means for Solving the Problems]

In order to achieve the above object, the present invention is as follows. That is, in a cutter deck of a lawn mower provided with at least a pair of left and right rod-shaped sleds for slidingly guiding the cutter deck along the lawn surface on the lower surface side of the cutter deck, the left and right sleds are provided in front of the rear side in the traveling direction. It is characterized in that they are arranged in a substantially C-shape in plan view so that the intervals between them become narrow.

[Action]

By arranging the left and right sleds in a substantially plane C shape so that the front side is narrower than the rear side in the traveling direction as described above, for example, when performing the lawn mowing work on the inclined surface in the direction perpendicular to the inclined direction as described above. , A large amount of load is applied to the sled on the lower side of the slope, and the sled on the lower side of the slope acts to push up the cutter deck diagonally upward, preventing the cutter deck from moving to the lower side of the slope as described above. It is possible to move it substantially straight forward in the traveling direction.

〔Example〕

The embodiment shown in the figure shows an example applied to a riding type triple rotary lawn mower, and as shown in FIG. 1, a cutter deck 1 is vertically attached to a lower part of a traveling machine body A such as a tractor by a link 2 or the like. It is movably mounted.

On the lower surface side of the cutter deck 1, as shown in FIG. 2, a pair of left and right rod-shaped sleds 3 and 3 are arranged.
Numeral 3 is arranged in a substantially C-shape on the plane so that the interval on the front side in the traveling direction (the direction of arrow a in the figure) is narrower than the interval on the rear side.

As shown in FIG. 3, the sleds 3 and 3 are mounted on brackets 4 and 5 provided on the front and rear of the cutter deck 1 so that the heights thereof can be adjusted by adjusting screws 41 and 51, respectively.
By adjusting the height position of the cutter deck 1 with respect to the ground contact surface E of each sled 3, the cutting height of the lawn g by the rotary cutting blade 6 in the cutter deck 1 can be adjusted. Reference numeral 7 denotes a rotary cutting blade driving pulley.

In the above-mentioned configuration, for example, when cutting grass on a sloping ground such as a golf course in a direction substantially perpendicular to the tilt direction, for example, when performing lawn mowing work with the machine body leaning to the right, the cutter deck 1 is The weight of the cutter deck 1 tends to move to the lower side in the inclination direction, that is, to the right side under its own weight. At that time, a large amount of load is applied to the right side sled, which is the lower side in the inclination direction, and the right side sled moves in the traveling direction as shown in FIG. Since the front side faces toward the center of the cutter deck 1, the cutter deck 1 is prevented from moving to the right by pushing upward against the slope of the cutter deck 1, and moves straight in a substantially straight line. It can be done. The same applies when performing lawnmower work with the machine leaning to the left.

Further, even when cutting a flat grass surface, by arranging the sleds 3 in a V-shape, it is possible to reduce the lateral shake of the cutter deck 1 and improve straightness.

In the past, when mowing grass while descending a slope, the cutter deck 1 sometimes swayed in the front-back direction to cause uneven cutting. However, by arranging the sled in a C-shape, the resistance against the contact surface is moderate. It is possible to prevent the cutter deck 1 from swinging in the front-rear direction due to a force, and it is possible to prevent the uneven cutting.

If the inclination angle θ of each sled 3 with respect to the traveling direction (front-back direction) of the cutter deck 1 is too large, running resistance increases, and conversely, if the inclination angle θ is too small, the straightness and the like decrease. It is desirable to set it to about 2 ° to 15 °.

In addition, although the example shows an example applied to a riding type lawnmower,
It is also applicable to walking type self-propelled or hand-operated lawn mowers.

[Effect of device]

As described above, the present invention has a very simple structure in which the left and right sleds are arranged in a substantially H-shaped plane so that the front side in the traveling direction is narrower than the rear side in the traveling direction. Even when turf is mowed at a substantially right angle, the cutter deck is prevented from shifting downward in the inclination direction, and it is possible to mow straight and evenly. In addition, especially in the case where the cutter deck is attached to the lower part of the traveling machine body with links etc., as described above, it is prevented that excessive force acts on the links etc. to deform or break it, and durability is improved. There is an effect that it can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an arrangement of a cutter deck in a riding type rotary lawn mower to which the present invention is applied, FIG. 2 is a plan view of the cutter deck, and FIG. 3 is a sectional view of a sled mounting portion. A is a traveling machine body, 1 is a cutter deck, 2 is a link, 3 is a sled, 4.5 is a bracket, and 6 is a rotary cutting blade.

Claims (1)

[Scope of utility model registration request] 1. A cutter deck of a lawn mower having at least a pair of left and right rod-shaped sleds for slidingly guiding the cutter deck along a lawn surface on the lower surface side of the cutter deck. The lawn mower cutter deck is characterized by being arranged in a substantially C-shape on the plane so that the space on the front side is narrower.