JPH0418345Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a roller mud removal device for a lawn mower.

(Prior Art) Power-driven lawn mowers are in practical use, which perform lawn mowing work by rotating a cutter in a horizontal plane using engine power. By using a rear wheel as a roller in such a lawn mower, the lawn surface after mowing can be pressed by rolling of the roller to level the ground.

(Technical problem to be solved by the invention) The above roller types have a large contact area with the ground, and there is a risk that grass clippings and mud may adhere to the area around the rollers.

Therefore, in order to scrape off the mud that adhered to the roller, a fourth
As shown in the figure, when the scraper 52 is provided around the roller 51 and the scraper 52 is provided integrally with the swinging arm 53 for adjusting the height of the roller 51, from the low cutting height of the solid line A to the imaginary line B When the mowing height is increased by lowering the roller 51 as shown in the figure, since the scraper 52 is integrally provided at the tip of the arm, it will lower, approaching the ground and interfering with the grass, creating resistance to movement, as well as changing the direction. When the scraper 52 is tilted forward and upward to change direction, the scraper 52 further lowers and hits the ground, making it difficult to obtain a large forward and upward inclination angle, making it difficult to change direction.

The present invention was developed to solve the above technical problem, and its purpose is to maintain the distance between the scraper and the ground at a specified level even when the rollers are adjusted up and down to adjust the cutting height. To provide a mud removal device that allows mowing, movement, direction change, etc. to be performed smoothly.

(Means for solving the technical problems) The means for solving the above technical problems is that in a lawn mower that uses rollers as movable wheels, the rollers are supported on the main body side by a swingable arm for height adjustment. At the same time, a scraper for scraping is disposed on a part of the circumference of the roller, a support arm of the scraper is supported coaxially and swingably on the spindle of the roller, and the arm is swingably pivoted toward the main body. The reason is that it is pivoted to the supported link.

(Operation by the above means) According to the above means, the scraper is restrained by the link when the roller descends, so it moves up and down with respect to the roller, and the scraper does not approach the ground and maintains a predetermined distance from the ground.

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

FIG. 1 is a longitudinal side view of a lawn mower 1, in which front wheels 3 consisting of rollers are provided on the left and right sides of the front of a housing 2 constituting the main body, which can be adjusted in the vertical direction to adjust the cutting height. A blade-like cutter 4 is disposed in the lower circumferential piece 2a of the housing 2 so as to be rotatable in a horizontal plane, and a vertical crankshaft 5a is mounted with a vertile engine 5 on the upper piece 2b of the housing 2. The lower part of the crankshaft 5a extends to form an output shaft 5b, to which a cutter 4 is connected, the engine 5 is covered with a cover 6, and a handle 7 is provided at the rear of the housing 2 so as to tilt backward and upward. .

A lawn mowing outlet 2c is formed at the rear of the housing 2 so as to be inclined rearward and upward, and a rear wheel consisting of a roller 8 is provided below the lower wall 2d of the outlet 2c.The roller 8 has a smaller diameter than the front wheel 3. The roller 8 has a base 9 attached to the boss portions 2g, 2g of the rear both sides 2e, 2f of the housing 2.
a, 9a, in the embodiment, the tip portions 9b, 9 of swinging arms 9, 9 pivotally connected via shaft bolts 10, 10
The roller 8 is rotatably supported by a long support shaft 11 installed between the rollers 9b and 9b.
It was formed by The height of the roller can be adjusted, for example, as follows: the base 12a of the secondary arm 12 is overlapped and pivoted on the inside of one arm 9A, and the arm 1
Reference numeral 2 is a plate spring material, and a circular locking hole 12b is provided in the middle part of the plate spring material near the outside of the side part 2e. The arm 9A is held by engaging with any one of the positioning protrusions 2h provided on the secondary arm 12, the handle 13 is connected to the rear part of the secondary arm 12, and the handle 13 is pulled to the left in FIG. The locking hole 12b is removed from the protrusion 2h, the arm 9A is swung about the shaft 10, and the locking hole 12b is engaged with any other part of the protrusion 2h to hold the arm 9A. Adjust the height of 8.

The scraper 14 for scraping off mud, grass clippings, etc. is moved sideways so as to approach a portion on the circumference of the roller 8, for example, the middle rear part in the height direction of the roller with a low cutting height shown by the solid line in FIG. put on a shelf The scraper 14 has arm portions 14a, 14a bent in a direction parallel to both end surfaces of the roller at both ends thereof, and the base portions of the left and right arm portions 14a, 14a are commonly pivotally connected to both ends of the support shaft 11. The end portion 15a of the regulation link 15 is pivotally attached to the intermediate portion of one arm portion of the scraper 14, specifically, the opposite arm portion 14a-A using a bolt 16 so as not to interfere with the height adjustment device. . The base 15b of the link 15 is located above the support arm 9 of the roller described above and is connected to the side 2f on this side.
It is pivotally connected to a boss portion 2i provided on the outside of the body by a boss 17.

In the above, at the low mowing height position indicated by the solid line in FIG. 2, the scraper 14 approaches the middle part in the height direction behind the roller 8 and scrapes off mud, grass clippings, etc. adhering to the circumference of the roller 8. On the other hand, suppose that the roller 8 is adjusted downward as shown by the imaginary line A in order to reach the highest cutting height. The scraper 14 is an arm portion 14
The end of a is pivotally connected to a support shaft 11 coaxially with the arm 9, and is swingable about this as a fulcrum, and the link 1
5, the scraper 14 is pulled by this and moves upward relative to the roller 8, so that the scraper 14 does not descend together with the descending of the roller 8. Therefore, even when the roller 8 is lowered, the scraper 14 does not come close to the ground.

(Effects of the invention) As is clear from the above, according to the invention, in the scraper provided on the outer circumference of the roller to scrape off mud and grass clippings, the roller can be moved up and down to adjust the cutting height. The scraper does not descend, so it is kept away from the ground for smooth movement, and even when tilted up to change direction, the scraper does not approach the ground, making changes in direction smooth and easy. In addition to this, it also has the advantage that the above can be achieved with a simple configuration in which the arm portion of the scraper is restricted via a link.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a vertical side view of the lawn mower, Fig. 2 is an explanatory side view of the roller section, Fig. 3 is a cross-sectional plan view of the same, and Fig. 4 is a conventional lawn mower. FIG. In the drawing, 1 is the lawn mower, 2 is the main body, 8 is the roller,
9 is an arm, 11 is a support shaft, 14 is a scraper, 1
4a is a support arm thereof, and 15 is a link.

Claims (1)

[Scope of utility model registration request] In a lawn mower with a movable roller, the roller is supported by a swingable arm for height adjustment on the main body of the lawn mower, and a scraper is provided on a part of the circumference of the roller. A roller mud removing device for a lawn mower, characterized in that a support arm is swingably supported coaxially on the spindle of the roller, and the arm is pivotally connected to a link pivotally supported on the main body side. .