JPS599122B2 - Hokougatakouunki - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a walk-behind cultivator having a control handle and a rotary device connected to the rear of the main body.

This type of tiller lifts the rear part when turning, etc., so if the rotary device is running at high speed, there is a risk of injury to the operator due to contact with the rotary device, mud flying off the rotary device, etc. There is a problem, and operations such as stopping the rotary device or decelerating it to a safe speed are required.

Furthermore, if the aircraft is rotated in a high-speed forward state during the above-mentioned rotation, there is a danger that the aircraft may swing around, etc., so it is necessary to switch the forward speed to a safe low speed.

Conventionally, this type of operation was performed each time the vehicle was rotated, making the operation complicated.

The present invention has been made with the above problems in mind, and includes:
Equipped with a balance weight that changes its attitude by its own weight when the rear of the aircraft is lifted, and automatically performs the above operations as the balance weight changes its attitude, thereby simplifying the operation when turning. In particular,
Using the kinetic energy associated with the posture change transition operation of the balance weight. The purpose is to ensure that the desired operation is performed.

Embodiments of the present invention will be described in detail below based on illustrative drawings.

The illustrated walk-behind cultivator has a rear main body A consisting of a mission case 2 that pivotally supports a pair of left and right wheels 1, 1, and an engine 4 mounted on a front frame 3 connected from the mission case 2. , a control handle 5 and a rotary device B are connected and equipped, and the rotary device B is connected to the mission case 2 of the main body A via a transmission case 6 that is interlocked and connected to the mission case 2. The transmitted power is configured to rotationally drive a tilling rotor 7 pivotally supported at the lower part of the transmission case 6 to perform tilling work, and inside the transmission case 6, there is information indicating the operating state of the tilling rotary γ. It is equipped with a clutch that switches between a driving state and a stopped state.

Further, as shown in FIG. 2, a swing operation lever 8 is pivotally attached to the control handle 5, and one end of this lever 8 is pivoted to the side wall of the transmission case 6 for controlling the clutch. The attached clutch operation link 9 is connected via a wire 10, and the clutch is configured to be switched to an engaged state when the lever 8 swings backward and downward, and to a disengaged state when the lever 8 swings forward and upward. A rotary device stopping mechanism 11 is configured to stop the rotary device B from the clutch, lever 8, etc.

The rotary device stopping mechanism 11 is configured to be automatically operated in conjunction with the clutch disengagement state by lifting the rear part via the steering wheel 5.

That is, the swing operation lever 8 is connected in a toggle manner in which the upper and lower swing positions are switched and maintained by the acting force of a spring 120 interposed between the swing operation lever 8 and the clutch operation link 9. A balance weight 1 rotatable around the same axis as the swinging horizontal axis X of the lever 8
3 are deployed.

This balance weight 13 is normally positioned in an upward position with the posture holding part 13' in contact with the lever 8 as shown in FIG. 3A, and is moved forward as shown in FIG. The lever 8 is configured to change its posture and come into contact with the abutting portion a of the lever 8 with an impact, and the kinetic energy associated with this transition is instantaneously applied to the lever 8 to switch it to the clutch disengaged state.

In the figure, 17a is a stopper for positioning the lever 8 in the downward swinging position, and 17b is a stopper for positioning the lever 8 in the upward swinging position.

According to the above configuration, when the rear part is lifted during turning, etc., the balance weight 13 swings forward and the rotary device B is automatically stopped as described above, but after the turning is completed, the balance weight 13 swings forward. Even if the rear part is brought into contact with the ground again, the stopped state of the rotary device B is maintained, and the rotary device B is activated by manually operating the lever 8.

At this time, the balance weight 13 is lifted to an upward position and swung to a reset state.

In addition, in the case where a transmission mechanism or the like is installed in the transmission case 6, the rotary device B may be decelerated to a safe speed in conjunction with the lever 8.

Further, the present invention is not limited to the rotary device B, and other required mechanisms such as a mechanism for switching the forward speed of the aircraft body to a low speed may be similarly operated in conjunction with each other.

In summary, the walk-behind tiller according to the present invention is a walk-behind tiller in which a steering handle 5 and a rotary device B are connected to the rear of the main body, and the control handle 5 includes a mechanism 11 for stopping or decelerating the rotary device B; Alternatively, an operating lever 8 for operating a required mechanism, such as a mechanism for switching the forward speed of the aircraft to a low speed, is mounted so as to be swingable back and forth about the horizontal axis As it is lifted, a balance weight 13 configured to be able to swing back and forth around an axis parallel to the horizontal axis X due to its own weight is attached, and further, the balance weight 13 is
The operating lever 80 is placed in a position where it can be switched by hitting the base end of the operating lever 80 by its swinging movement in the front and back direction, and the rotary device B is stopped as the rear part of the aircraft body is lifted. Alternatively, it is configured to operate a required mechanism such as a deceleration mechanism 11 or a mechanism that switches the forward speed of the aircraft to a low speed.

That is, a mechanism 11 that stops or decelerates the rotary device B by directly hitting the control lever 8 by utilizing the kinetic energy accompanying the attitude change of the balance weight 13 or a necessary mechanism such as a mechanism that switches the forward speed of the aircraft to a low speed. Therefore, for example, the change in attitude of the balance weight 13 due to lifting of the rear part of the aircraft body may be used to operate the switch to stop or decelerate the rotary device B or reduce the forward speed of the aircraft body to a low speed. This has the advantage that the safety device can be constructed from a simple and inexpensive structure compared to a case where required mechanisms such as a mechanism for switching between the two modes are operated using an electromagnetic clutch.

Furthermore, since the required mechanism is actuated by directly hitting the operating lever 8 as the posture of the balance weight 13 changes, for example, the balance weight 13 and the operating lever 8 may be connected with a wire. Therefore, compared to the case where the required mechanism is operated using the potential energy of the balance weight 13 due to lifting of the rear part of the fuselage, there is an advantage that the required mechanism can be operated using a smaller balance weight.

[Brief explanation of drawings]

The drawings show an embodiment of the walk-behind cultivator according to the present invention, and the first
The figure is an overall side view, FIG. 2 is a side view showing the rear lifting state, and FIG. 3 A is an explanatory view showing the working state of the chanting balance weight. 5...Control handle, 8...Control lever, 11...Mechanism for stopping or decelerating the rotary device, 13...Balance weight, X...
...Horizontal axis center, B...Rotary device.

Claims (1)

[Claims] 1. In a walk-behind cultivator in which a control handle 5 and a rotary device B are connected to the rear of the main body, a mechanism 11 for stopping or decelerating the rotary device B is attached to the control handle 5;
Or, a mechanism that switches the forward speed of the aircraft to a low speed, etc.
An operating lever 8 for operating the required mechanism is mounted so as to be able to swing back and forth around the horizontal axis X, and is placed near the operating lever 8 in parallel to the horizontal axis X due to its own weight as the rear part of the aircraft is lifted. A balance weight 13 configured to be able to freely swing back and forth around an axis is attached, and the balance weight 13 is swinged back and forth to strike the base end of the operating lever 80 to open the operating lever. 8 is placed in a position where it can be switched, and as the rear part of the aircraft body is lifted, a required mechanism such as a mechanism U that stops or decelerates the rotary device B or a mechanism that switches the forward speed of the aircraft body to a low speed is activated. A walk-behind tiller characterized by being configured as follows.