JPH06320978A - Walking type work machine - Google Patents

Abstract

PURPOSE:To make a main clutch operable with a grip held by hand and stabilize the maneuver of a machine body by dividing the grip of a maneuvering handle into a rear fixed grip section and a front rotary grip section, and performing the rotating operation of the front grip section for engaging and disengaging the main clutch. CONSTITUTION:The maneuvering handle H of a walking type work machine 1 is provided with a main clutch lever 4 for engaging and disengaging a belt tension clutch 2. Furthermore, an auxiliary main clutch 5 linked to the main clutch lever 4 is laid in the vicinity of the grip 6 of the handle H. In this case, the grip 6 is divided into a rear fixed grip section 6a and a front rotary grip section 6b. In addition, the section 6b is provided with a fitting of inverted U-shape linked to the lever 5. According to this construction, the grip 6b is rotatably operated and the main clutch lever 4 can be driven for oscillation via the auxiliary clutch lever 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a walk type working machine such as a walk type managing machine and a walk type cultivator, and more particularly to a main clutch operating structure.

[0002]

2. Description of the Related Art Conventionally, a main clutch operating structure of a walk-behind management machine is disclosed in Japanese Patent Laid-Open No. 5-16691.
It is configured to be able to be turned on and off via a main clutch lever that is provided in the center of the left and right of the steering handle around the horizontal axis so as to be swingable in the front-rear direction.

[0003]

When the main clutch is turned on and off, a one-handed handle operation is performed, so that the operation of the machine becomes unstable when the main clutch is operated.

It is an object of the present invention to devise a main clutch operating structure so that the main clutch can be operated without causing unstable operation of the machine body.

[0005]

To achieve the above object, the present invention is characterized in that the handle grip has a divided structure of a rear fixed grip and a rotatable front rotary grip, and the front rotary grip is rotated. The point is that the main clutch can be turned on and off.

[0006]

As shown in FIGS. 1 and 4, when the main clutch is operated, when the front rotary grip 6b is gripped and rotated clockwise, that is, clockwise, the auxiliary main clutch lever 5 and the main clutch are rotated. The main clutch is engaged and operated via the lever 4, and the main clutch is disengaged when rotated counterclockwise, that is, to the left.

[0007]

As described above, since the main clutch can be turned on and off while the handle grip is held,
When operating the main clutch, the steering operation of the aircraft will be stable with the steering wheel operated by both hands.

[0008]

Embodiments of the present invention will be described below with reference to a walk-type cultivator, which is an example of a walk-type working machine.

As shown in FIG. 7, this walk-type cultivator is
Front frame 1 extending forward from the mission case M
The engine E is mounted on the engine E, the belt tension clutch 2 as a main clutch is installed over the output shaft of the engine E and the input shaft of the mission case M, and the traveling wheels 3 are axially supported under the mission case M. At the same time, a steering handle H that can be changed back and forth is extended rearward from the mission case M.

As shown in FIGS. 1 and 2, the steering handle H is provided with a main clutch lever 4 for opening and closing the belt tension clutch 2 and a horizontal axis X.
It is configured so that the clutch can be disengaged by operating it forward around ₁ and the clutch can be engaged by operating backward.

Then, the grip 6 of the steering handle H
An auxiliary main clutch lever 5 that is vertically swingable around a horizontal axis X ₂ that is linked to the main clutch lever 4 is provided in the vicinity.

[0012] The auxiliary main clutch lever 5 is pivotally supported by a linkage arm 4b attached to a boss portion 4a of the main clutch lever 4, the tip of the auxiliary main clutch lever 5 being pivotally supported via a connecting pin 5a. The hole for the connecting pin 5a of the linking arm 4b of the lever 4 is formed as a long hole 4c for allowing the swing operation of the auxiliary main clutch lever 5.

The grip 6 of the steering handle H is divided into a rear fixed grip 6a and a front rotary grip 6b rotatable around the axis of the handle rod, and the front rotary grip 6b has a structure shown in FIG. As shown in FIG. 5, an inverted U-shaped linkage metal fitting 7 that is linked to the auxiliary main clutch lever 5 is additionally provided, and the main clutch lever 4 is inserted through the auxiliary main clutch lever 5 by rotating the front rotary grip 6b.
Is configured to be swingable.

Further, the auxiliary main clutch lever 5 is arranged in such a state that when the thumb holding the rear fixed grip 6a is pushed downward, the clutch is engaged, and when the index finger and the middle finger are operated upward, the clutch can be disengaged. There is.

As shown in FIG. 5, a transmission lever 9 for operating a transmission in the transmission case M is provided on the side surface of the transmission case M, and a horizontal axis X ₃ is provided.
By vertically swinging around, the shift arm 9a swings integrally with the shift lever 9 to selectively select either the forward shift rod 10 or the reverse shift rod 11, and swing vertically to the vertical axis Y. When it is operated, the forward shift rod 10 or the reverse shift rod 11 selected is switched between high and low speeds so as to be able to perform a shift operation to the first and second forward speeds and the first and second reverse speeds.

This walk-type cultivator has a steering handle H
When the aircraft is operated to the reverse side regardless of the change in the front-back direction, an alarm is issued to call attention to the operator.

That is, as shown in FIG. 6, a path changeover switch S ₁ operated by a cam 12 which is rotated together with the steering handle H by changing the front-back direction of the steering handle H on the upper portion of the mission case M, and the mission case. ON / O that detects whether the forward shift rod 10 or the reverse shift rod 11 has been operated on the side surface of M
FF switches S ₂ and S ₃ are provided, and these switches S ₁ , S ₂ and S ₃ are incorporated in the alarm circuit A, and when the steering handle H is in the normal rear position of the machine, The buzzer 13 sounds when the reverse shift rod 11 is operated to either high or low speed via 9 and the forward shift that becomes the shift rod for the reverse of the fuselage by positioning the steering handle H on the front side of the fuselage. When the rod 10 is operated to either high speed or low speed, the buzzer 13 sounds.

[Embodiment] In the above embodiment, the auxiliary main clutch lever 5 linked to the main clutch lever 4 is operated by rotating the front rotary grip. The lever may be directly linked to be operable.

The walking type working machine may be a walking type management machine or a walking type lawnmower.

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 of a main part.

FIG. 2 is a side view showing an operating state of a clutch lever.

FIG. 3 is a plan view of a main part

FIG. 4 is a vertical sectional rear view of the main part.

[Figure 5] Side view of the mission case

FIG. 6 is a schematic diagram of an alarm device.

[Figure 7] Overall side view of a walk-behind cultivator

[Explanation of symbols]

 2 Main clutch 6 Handle grip 6a Rear fixed grip 6b Front rotation grip

Claims (1)

[Claims] 1. The handle grip (6) has a divided structure of a rear fixed grip (6a) and a rotatable front rotation grip (6b), and the main clutch (2) is rotated by rotation of the front rotation grip (6b). A walk-behind work machine that can be turned on and off.