JPH06125603A - Walking type mobile agricultural machine - Google Patents

Abstract

PURPOSE:To lower the machine body centroid of a walking type mobile agricultural machine equipped with an engine, a rotary working device and mobile wheels and facilitate the control operation. CONSTITUTION:A forwardly protruding rotary transmission case 2 is connected to the lower part of a vertical engine 1 and a rotary working device 3 is arranged in front of the engine. Mobile wheels 6 are simultaneously arranged under the rear of the engine 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a walking type mobile agricultural machine such as a walking type cultivator and a walking type lawn mower.

[0002]

2. Description of the Related Art Conventionally, in a walk-type cultivator, which is an example of a walk-type mobile agricultural machine, an engine mounting frame is connected to the front of a vertical running mission case to dispose an engine in front of running wheels. It had a structure in which a rotary tiller was arranged behind the traveling mission case (see, for example, Japanese Utility Model Laid-Open No. 3-129001).

[0003]

Since the center of gravity of the airframe is high, pitching and rolling are likely to occur, and the rotary cultivator side is lightened by the engine arranged in front of the traveling wheels, so that the rotary cultivator can be driven and driven. Due to the force, the rotary tiller rises slightly, and the rotary work with the handle pressed down becomes hard work.
Further, since the load of the engine acts as a ground load of the traveling wheels, the propulsive force of the traveling wheels becomes large, and there is a disadvantage that good plowing work is difficult to perform due to the drag phenomenon of the rotary tiller. The present invention has good stability of the airframe, and further,
The purpose of the present invention is to enable cultivating work to be carried out without heavy labor, and to be able to perform good cultivating work.

[0004]

The characteristic construction of the present invention for achieving the above object is to perform a rotary operation by providing a frontward projecting rotary transmission case at a lower portion of an engine having an output shaft projecting downward. The device is arranged in front of the engine, and traveling wheels are arranged in the lower rear part of the engine.

[0005]

By providing a rotary transmission case that projects horizontally in the lower part of the engine, the height of the engine against the ground can be lowered, and the gears and other transmission devices in the rotary transmission case are arranged in a low position. , The center of gravity of the body can be lowered. When the rotary working device is arranged in front of the engine and the traveling wheels are arranged behind the engine in this way, the driving reaction force of the rotary working device causes the rotary working device to lift and prevent the steering handle from being lifted. Although not, it is possible to suppress the lifting of the rotary working device by utilizing a part of the engine weight in which the load is distributed to the rotary working device and the traveling wheels. Moreover,
Since the weight of the engine is distributed between the rotary working device and the traveling wheels, the ground load on the traveling wheels is reduced, the effect of exerting a large propulsive force on the wheels is suppressed, and the dragging phenomenon of the rotary working device is suppressed. To be done.

[0006]

As a result of the above structure, the pitching and rolling of the machine body are suppressed, and the operation of manipulating the machine body is facilitated. Further, since the engine load suppresses the lifting of the rotary working device due to the driving reaction force of the rotary working device, the rotary work can be performed without applying a large force to the steering handle. Further, since the engine load is distributed to the rotary working device and the traveling wheels, the ground load on the wheels becomes small, the generation of a large propulsive force of the traveling wheels is suppressed, and the dragging phenomenon of the rotary working device is suppressed. Good cultivating work can be done.

[0007]

Embodiments of the present invention will be described below with reference to a walk-type cultivator. As shown in FIG. 1, the output shaft 1 of the engine 1
A vertical rotary transmission case 2 protruding forward is connected to the lower part of the vertical engine with a directed downward, and a plowing claw 3a is attached to a rotary shaft 2a protruding leftward and rightward from the rotary transmission case 2 to mount the engine. 1, a center drive type rotary cultivating device 3 as a rotary working device is arranged in front of the rotary working device 2, a frame 4 connected to the rear surface of the rotary transmission case 2, a steering handle 5,
In addition, the traveling wheels 6 are attached to form a center drive type walking cultivator. As shown in FIGS. 3 and 4, the output from the engine 1 is the rotary clutch 7
And a gear transmission 9 capable of shifting to high and low stages in the rotary transmission case 2 via a bevel gear 8, and
The rotary tiller 3 via the chain transmission 10
It is supposed to be transmitted to. On the other hand, to the traveling wheels 6, as shown in FIG. 1, a transmission shaft 11 branched from a portion on the transmission upper side of the rotary clutch 7 and
It is adapted to be transmitted to the traveling wheels 6 via the traveling clutch 12 and the reduction gear in the traveling deceleration case 13 and the chain transmission device in the traveling chain case 14. The steering handle 5 is equipped with a rotary clutch lever 15 and a traveling clutch lever 16 which can be gripped together with the steering handle 5, and when the steering handle 5 is released, the rotary tiller 3 and the traveling wheels 6 are transmitted. It is designed so that it will be refused. As shown in FIGS. 3 and 4, the transmission gear 9a of the rotary tiller 3 is shown.
When the rotary speed change lever 17 is operated in the left-right direction around the longitudinal axis X, the shift rod 9b is slid in the left-right direction to perform the speed change. As shown in FIG. 3, the engine 1 is fixedly connected to stays 2A provided at four locations behind the rotary transmission case 2 so as to project upward. As shown in FIG. 1, a gauge wheel 18 is disposed in front of the rotary tilling device 3, and the gauge wheel 18 includes a rotary cover 19.
It is connected to a pair of left and right mounting brackets 20 on the upper surface. The rotary cover 19 has a pair of left and right mounting brackets 20 attached to the upper surface of the rotary cover 19, the rear ends of which are bolted to the sidewalls of the rotary transmission case 2, and another attachment attached to the upper surface of the rotary cover 19. The stay 21 is connected to and supported by the engine 1. At the rear end of the frame 4 connected to the rear surface of the rotary transmission case 2, a tubular bracket 22 for mounting a resistance rod is provided.

[Other Embodiments] The walk-behind mobile agricultural machine may be a walk-behind lawnmower in which a lawn mowing rotary as a rotary working device is attached to a rotary shaft.

It should be noted that reference numerals are given in 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]

1] Overall side view

FIG. 2 is a plan view with the engine removed.

FIG. 3 is a side view showing a connected state of the engine and the rotary transmission case.

FIG. 4 is a cross-sectional plan view showing the inside of a rotary transmission case.

[Explanation of symbols]

 1 engine 2 rotary transmission case 3 rotary working device 6 traveling wheels

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koji Nomura 64, Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Sakai Factory Co., Ltd.

Claims (1)

[Claims] 1. A rotary working device (3) in which a rotary transmission case (2) projecting forward is connected to a lower portion of an engine (1) having an output shaft (1a) projecting downward.
Is disposed in front of the engine, and traveling wheels (6) are disposed in the lower rear part of the engine (1).