JPH05123034A - Walking type mower - Google Patents

Abstract

PURPOSE:To prevent the feet of an operator from being inserted into a mowing space and simultaneously enable to change the ground-based height of a mower by fixing the lower surfaces of right and left side bodies at low positions and placing a mower-mounted intermediate body in the state capable of vertically changing the position of the intermediate body. CONSTITUTION:Front and rear wheels 1, 2 are attached to right and left side bodies 3, 3, and the right and left side bodies are fixed so that the lower surfaces of the bodies are placed at low positions. An intermediate body 4 mounting a mower 5 is installed in the state capable of being vertically freely changed on the basis of the side bodies.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a walking lawn mower.

[0002]

2. Description of the Related Art In order to change the cutting height of a mower, conventionally, for example, as shown in the embodiment of Japanese Utility Model Laid-Open No. 54606/1990, blades are housed to form a cutting space to form a mower. An engine is attached to a mower deck as an intermediate body having a side wall and an upper wall, four front and rear wheels are individually swingably mounted on the mower deck, and an adjusting lever for individually swinging the four front and rear wheels is attached. Was attached.

[0003]

In adjusting the cutting height of the mower having the above-mentioned structure, when the wheels are vertically swung by the adjusting lever, the mower deck moves up and down together with the engine, so that the lower end of the side wall of the mower deck raises the ground height. Change the more you adjust it. Therefore, in the case of high mowing where the ground height becomes high, the grass may leak or branches or stones bounced off by the blade may pop out from the gap between the ground and the lower end of the side wall. Workers sometimes insert their feet into the cutting space without noticing it, and some measures have been required. An object of the first invention is to provide a device that can solve the conventional problems as much as possible by devising a device for mounting wheels.

[0004]

The characteristic construction according to the first aspect of the present invention is to attach front and rear wheels to the left and right side bodies, respectively.
The lower surface of the left and right side bodies is set to a low ground clearance, and a mower is installed in an intermediate body located between the both side bodies, and the intermediate body is set to the side body to change the ground clearance of the mower. It is configured so that the vertical position can be changed, and its operation and effect are as follows.

[0005]

In other words, the ground height of the lower end of the intermediate body is changed as the ground height of the mower is changed as in the conventional case, but the ground heights of the lower surfaces of the left and right side bodies are not changed. Moreover, since the lower surface of the left and right side bodies is set to have a low ground clearance, it is possible to suppress the leakage of cut grass and the protrusion of stones.
Further, it is less likely that the worker inserts his foot into the mowing space.

[0006]

As a result, the amount of leakage of cut grass and the like can be reduced, so that it is not necessary for the worker to take a work form that reduces the work efficiency such as post-cutting by the worker after the cutting, and the worker does not need to take a foot etc. It's also safe because you don't plug in.

In addition to the object of the first invention, the object of the second invention can prevent the ingress of floating grass or the like from the outside into the intermediate body even when the intermediate body moves up and down with respect to the left and right side bodies. The point is to provide things.

[0008]

According to a second aspect of the present invention, the left and right side bodies and the intermediate body are in a superposed state in a side view over the entire vertical movement range of the intermediate body. The effect is as follows.

[0009]

In other words, even if the left and right side bodies and the intermediate body move up and down relatively, since they are in a superposed state in a side view, a gap is created between the opposing side faces, and this gap portion floats. It becomes a resistance against the ingress of cut grass,
It is possible to prevent them from entering and reduce the leakage of mower or other operating noise through the side body.

[0010]

As a result, when the left and right side bodies and the intermediate body move up and down relative to each other so that they are completely separated from each other, the phenomenon that floating grasses and the like are likely to enter through the gap is effective. Therefore, the effect of the first aspect of the present invention due to the intermediate body moving up and down with respect to the left and right side bodies can be made more effective.

[0011]

EXAMPLES As shown in FIGS. 1 and 5, front and rear wheels 1, 2
The side bodies 3 and 3 attached with are arranged on the left and right, respectively, and the intermediate body 4 is placed between the left and right side bodies 3 and 3.
The mower 5, the mower drive engine 6, and the mission case 7 are attached to the intermediate body 4, and the steering handle 8 is provided rearward from the left and right side bodies 3 and 3 to configure a walk-behind lawn mower. There is.

The transmission system to the rear wheel 2 will be described. As shown in FIG. 4, the intermediate body 4 is connected to the engine hood 9
And the mowing case 10 and the mowing case 1
The blade 11 for mowing is arranged in 0, and the mowing case 10
A vertical drive shaft 12 is extended from an engine 6 attached to the upper wall of the upper wall, and a blade 11 is rotationally driven around the drive shaft 12 to form a mower 5 for cutting grass. On the other hand, the transmission case 7 arranged near the rear wheel 2 and the vertically oriented drive shaft 12 are transmission-coupled by a belt transmission mechanism 13. As shown in the figure, the output shaft 14 extends from the transmission case 7 toward the left and right rear wheels 2 and 2, and the output shaft 1
Attach the drive pinions 15, 15 to the left and right extension ends of 4,
An internal tooth type passive gear 16 formed on the left and right rear wheels 2 and 2 is engaged with each other to form a traveling drive structure from the engine 6 to the left and right rear wheels 2. The front wheel 1 is rotatably supported by the side body 3 and only idles.

Next, the vertical movement structure of the intermediate body 4 will be described. As shown in FIGS. 1 to 3, a lateral support shaft 17 is installed over the front ends of the left and right side bodies 3, 3, and bell crank-shaped forward swinging is provided near the left and right ends of the lateral support shaft 17, respectively. The movable arm 18 is attached to the support shaft 17 in a freely rotatable manner, and one ends of the left and right front swing arms 18, 18 are attached to the vertical walls 10A, 10A of the mowing case 10, respectively. On the other hand, the left and right rear support shafts 19, 19 are extended from the rear ends of the left and right side bodies 3, 3, respectively, and the bell crank-shaped rear swing arms 20, 20 can be integrally rotated at the extended ends. It is attached to. Both rear swing arms 20,
The rear swing arms 20, 20 are integrally swingable by connecting one end of each of the rear swing arms 20 and 20 by a lateral connection frame 21, and the mission case is attached to one end of each of the rear swing arms 20, 20. An output shaft 14 extending from the left and right rear wheels 2, 2 to the outer shaft 7 is rotatably fitted to the output shaft 14.
Then, the other ends of the left front swing arm 18 and the left rear swing arm 20 are connected by a front-rear connecting frame 22 to integrally swing the front, rear, left and right swing arms 18, 20. Configure as possible. The operating lever 23 provided on the steering handle 8 is linked to the left rear swing arm 20, and the swinging operation of the operating lever 23 allows the intermediate body 4 to be moved up and down to change the cutting height. ..

Next, the structures of the side body 3 and the engine hood 9 will be described. Both of them 3 and 9 are integrally molded products of resin. As shown in FIGS. 3 and 4, a space a of expansion is formed, and a urethane resin is foamed and sealed in this space a. Therefore, it is light in weight for the meat pressure, and it is possible to reduce leakage of engine noise and blade rotation noise.

The lower end of the side body 3 is set to be low above the ground so that the ground height can be kept constant regardless of the vertical movement of the intermediate body 4, and the upper end of the side body 3 and the lower end of the engine bonnet 9 can be maintained. The parts are superposed in a side view, and the superposed state is maintained regardless of the vertical movement of the intermediate body 4.

[Other Embodiments] The left and right side bodies 3 and 3 may be simple frames instead of cases. The vertical movement structure of the intermediate body 4 may be automatically performed by using an actuator such as a cylinder.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a side view showing an intermediate body and showing a state in which it is located at a minimum height of a cutting height adjusting position.

FIG. 2 is a side view of the intermediate body showing a state where the cutting height is set to the maximum height from the state of FIG.

[Fig. 3] Overall cross-sectional plan view

FIG. 4 is an overall vertical cross-sectional front view in which the cutting positions of the left and right side bodies are different.

[Fig. 5] (a) Overall perspective view in which the cutting height is set to a low state (b) Overall perspective view in which the cutting height is set to a high state

[Explanation of symbols]

 1 front wheel 2 rear wheel 3 side body 4 middle body 5 mower

Claims (2)

[Claims] 1. Front and rear wheels (1) and (2) are attached to the left and right side bodies (3) and (3), respectively, and the lower surfaces of the left and right side bodies (3) and (3) are set at a low ground clearance. At the same time, the intermediate body (4) located between the both side bodies (3) and (3) is equipped with the mower (5), and the intermediate body (4) is set to change and set the ground clearance of the mower (2). ) Is a walk-behind lawn mower in which the vertical position can be changed with respect to the side bodies (3) and (3). 2. The left and right side bodies (3), (3) and the intermediate body (4) are in a superposed state in a side view over the entire vertical movement range of the intermediate body (4). The walk-behind lawn mower according to claim 1, wherein