JPH0117134Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a housing structure for a lawn mower that is driven, for example, by hand.

In general, it is preferable to tilt the lawn mower blade approximately 1°30' forward relative to the ground in order to mow the lawn evenly. Recently, the lower end of the housing that houses the blade is positioned below the blade so that stones and the like can be removed by the lower end of the housing.

By the way, the blade and the lower end of the housing are generally set to be parallel, so even if the lower end of the housing housing the blade that is tilted forward as described above is positioned below the blade, the rear end will rise. Because the gap between it and the ground becomes larger, it is possible that stones and other objects could get in. To solve this problem, the lower end of the housing could be made parallel to the ground instead of parallel to the blade, but this would have the disadvantage of increasing the friction between the lower end of the housing and the grass as it travels, and increasing the hand-holding load. There is.

This invention focuses on the fact that the friction that occurs during driving mainly occurs between the lower end of the housing that is perpendicular to the running direction and the grass, and that the friction that occurs between the lower end of the housing side that is approximately in line with the running direction and the grass is small. The purpose of this invention is to provide a housing structure for a lawn mower that can effectively prevent obstacles such as stones from hitting the blade during operation, and that can reduce the load associated with running. is to provide.

In order to achieve such an objective, the present invention has the lower end of the side of the housing that accommodates the forward-inclined blade positioned below the blade and parallel to the ground, and the lower end of the partition plate at the rear of the housing is positioned below the lower end of the side of the housing. A structural feature is that it is located above the

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a partially cutaway side view of a lawn mower that is driven by hand, and FIG. 2 is a bottom view of the lawn mower.

In the lawn mower 1, an engine 3 is mounted on a housing 2 integrally formed of aluminum alloy or the like. A pair of left and right handles 4, 4 extend diagonally rearward from the rear of the housing 2, and a grass bag 5 for storing cut grass is attached between these handles 4, 4.

On the other hand, a scroll portion 7 surrounding the blade 6 is formed in the housing 2, and a lower side end 8 of the scroll portion 7, that is, a lower side end 8 of the housing 2 is parallel to the ground G and located below the blade 6. ing. Further, the blade 6 is attached to a blade holder 9.
The drive shaft 10 of the engine 3 is fixed to the drive shaft 10 of the engine 3 through the drive shaft 10, and the drive shaft 10 is inclined at an angle of about 1°30' with respect to the vertical direction. The blade 6 is therefore held tilted forward by approximately 1° 30', and the blade 6 and the lower lateral end 8 of the housing 2 are not parallel.

In addition, a partition plate 11 is provided on the rear lower surface of the housing 2.
will be provided. The lower end 12 of this partition plate 11 is bent inward, and the side lower end 8 of the housing 2
It is located above the blade 6 and below the rear end of the blade 6.

In the above, grip the handle 4 and
The lawn mower 1 is pushed forward and run while rotating the blade 6 by tilting the operating lever 13 provided at the front forward. Then, since the lower side end 8 of the housing 2 is parallel to the ground below the blade 6, obstacles such as pebbles can be prevented from entering the scroll part 7. Even if the lower side end 8 of the housing 2 Even if a pebble shorter than the gap between the housing 2 and the ground G enters, the blade 6 will not be damaged because the blade 6 is located above the side lower end 8 of the housing 2. Here, since the lower end of the side of the housing 2 is substantially along the running direction of the lawn mower 1, the friction with the grass that occurs as the lawn mower 1 runs is slight and does not hinder the running of the lawn mower 1.

On the other hand, since the lower end 12 of the partition plate 11, which is substantially perpendicular to the running direction of the lawn mower 1, is located above the side lower end 8, the lower end 12 of the partition plate 11 and the grass that are generated as the lawn mower 1 runs are separated from the lower end 12 of the partition plate 11. The friction between them is extremely small and does not increase the pushing load. Further, since the lower end 12 of the partition plate is bent so as to cover the rear end 6b of the blade 6 from below, foreign matter will not enter during the operation. In particular, the tip 6a of the blade 6 and the housing 2
and the lower end 8 of the partition plate 11 and the lower end 1 of the partition plate 11.
2 and the side lower end 8 of the housing 2 is l≦L, the grass after mowing will not touch the lower end 12 of the partition plate 11, so that the lower end 12 of the partition plate 11 and Friction between the grass and the grass can be completely eliminated.

Although an example in which the housing structure of the present invention is applied to a lawn mower that is driven by hand has been described above, the present invention can also be applied to a lawn mower that is driven by the driving force of an engine. By doing so, the lawn mower can be run with less power.

As explained above, according to the present invention, it is possible to reliably prevent obstacles from hitting the blade during lawn mowing work, while also allowing the lawn mower to run with less force. .

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of a lawn mower to which a housing structure according to the present invention is applied, and FIG. 2 is a bottom view of the same lawn mower. In the drawings, 1 is a lawn mower, 2 is a housing, 6 is a blade, 6a is a blade tip, 6b is a rear end of a blade, 8 is a side lower end of the housing, 11 is a partition plate, and 12 is a lower end of the partition plate.

Claims (1)

[Claims for Utility Model Registration] (1) The lower end of the side of the housing that accommodates the forward-inclined blade is located below the blade and is approximately parallel to the ground, and the lower end of the partition plate provided at the rear of the housing. A housing structure for a lawn mower, characterized in that: is located above the lower side of the housing. (2) If the distance between the lower side end of the housing and the tip of the blade is l, and the distance between the lower side end of the housing and the lower end of the partition plate is L, then l
A housing structure for a lawn mower according to claim 1, characterized in that the relationship is ≦L.