JPH0446498Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is based on the following: A tilling rotary is connected to the rear of a self-propelled aircraft, which has running wheels arranged at one location in the longitudinal direction of the aircraft when viewed from the side. The present invention relates to a walk-behind cultivator in which a grounding body for setting the plowing depth is movable up and down, and the plowing depth can be changed and set by changing the installation height of the grounding body.

[Prior art]

In the walk-behind cultivator described above, the raising and lowering of the ground-contacting body has conventionally been performed using human operating force.

[Problem that the invention attempts to solve]

For this reason, not only is it time-consuming to change the plowing depth, but it is also difficult to change the plowing depth because it is necessary to lower the grounding body relative to the machine body against the weight of the machine applied thereto.

The purpose of the present invention is to make it possible to raise and lower the grounding body in a simple and easy manner, and to make it possible to artificially raise and lower the grounding body even when the structure for this purpose is inoperable, and to make the structure simple. It's about making sure you get it.

[Means for solving problems]

The present invention has traveling wheels arranged at one location in the longitudinal direction of the machine when viewed from the side, and a tilling rotary is connected to the rear of the self-propelled machine, and the plowing depth can be set with respect to the frame of the self-propelled machine. A walk-behind cultivator is provided with a grounding body for movable up and down, the grounding body for setting the plowing depth is provided so as to be able to change the driving up/down position with respect to the frame of the self-propelled machine via a drive device, and The driving device includes a cylindrical shaft integrated with the grounding body, a rotary operation shaft for lifting and lowering the grounding body that is rotatably mounted on the aircraft frame side and is internally screwed into the cylindrical shaft, and a motor serving as a power source. and an interlocking mechanism that links the rotary operation shaft to the motor, and the interlocking mechanism is interlocked with an interlocking arm that is rotatably attached to the rotary operation shaft, and an output shaft of the motor. a motor-side interlocking member; and a connecting shaft attached to the free end side of the swing arm so as to interlock the motor-side interlocking member and the interlocking arm at a location eccentric to the rotational operation shaft. Further, the motor-side interlocking member is configured to be connectable and separable with respect to the connection shaft, and the motor-side interlocking member and the motor are in a state where the interlocking with respect to the connection shaft is released,
It is characterized in that the interlocking arm and the connecting shaft are attached so as to be repositionable to a position outside the rotation locus as the interlocking arm and the connecting shaft rotate around the rotational operation shaft. and,
Its action and effects are as follows.

[Effect]

Simply by operating the motor, the motor drives the rotary operating shaft and raises and lowers the grounding body. When the motor and the motor-side interlocking member are set to the interlocking release position, the interlocking of the motor side with respect to the interlocking arm can be released, so that even if the motor is equipped with a worm gear type or other speed reduction mechanism, the rotational operation shaft can be easily moved. In addition to enabling manual operation, when the interlocking arm is rotated by grasping the connecting shaft, the rotary operation shaft rotates, and the grounding body can be manually raised and lowered using the interlocking arm as a handle. Moreover, since the area near the interlocking arm is open, the rotational operation of the interlocking arm can be easily performed without being obstructed by the motor or the motor-side interlocking member.

[Effect of idea]

The grounding body can be raised and lowered easily and easily by simply driving the motor, and the plowing depth can now be changed and set easily and quickly. Furthermore, even if the motor is unable to raise and lower the grounding body due to a failure of the motor itself or a failure of the motor drive system such as battery discharge, it is possible to raise and lower the grounding body manually and from the viewpoint of rotating the interlocking arm. It is now possible to easily change the plowing depth. Furthermore, there is no need for a special handle to manually operate the grounding body, which is advantageous in terms of structure.

〔Example〕

As shown in Fig. 1, it is a self-propelled aircraft that has a pair of left and right running wheels 1, 1, an engine 2, a battery 3, a control handle 4, etc. arranged so as to be located at one location in the longitudinal direction of the aircraft when viewed from the side. A tilling device having a tilling rotary 5 and a free-rotating ground tail wheel 6 is connected to the rear part, and the power is transmitted from the self-propelled body to the tilling device, so that the depth of penetration of the tilling rotary 5 into the ground is set to a set value. The walk-behind cultivator is constructed so that the machine body is supported on the ground by wheels 1 and tail wheels 6 in a posture such that the tiller works while setting the plowing depth to a set value.

As shown in FIG. 2, the support shaft 7 of the tail wheel 6 is attached to a support tube 9 fixed to the tiller body frame 8 so that it can be slid up and down by turning a screw shaft 10. be. And electric motor 11
A worm gear type reduction mechanism 12 is installed in the motor body.
The output shaft 13 is arranged so as to be coaxial with the protrusion 10a from the support tube 9 of the threaded shaft 10 as a rotary operation shaft for raising and lowering the tail wheel, and the motor side support member 14 and a motor-side interlocking rotating member 16 attached to the support tube 9 via the support tube-side support member 15 and integrally rotatably attached to the motor output shaft 13, and a connecting shaft 17 for interlocking with the interlocking rotating member 16. The motor 11 is connected to the screw shaft protrusion 10a through an interlocking mechanism 19 consisting of an interlocking arm 18 which is provided eccentrically from the screw shaft protrusion 10 and is rotatably attached to the screw shaft protrusion 10a. The screw shaft 10 is configured to be rotatably driven by the motor 11 in conjunction with the motor 11.

That is, the grounding body 6 for setting the plowing depth is connected to a cylindrical shaft 7 that is integrated with the grounding body 6, and a grounding body that is rotatably attached to the machine frame 8 side and that is internally fitted and screwed into the cylindrical shaft 7. The self-propelled aircraft frame 8 is connected to the self-propelled aircraft frame 8 via a drive device consisting of a rotary operation shaft 10 for use in the vehicle, a motor 11 serving as a power source, and an interlocking mechanism 19 that links the rotary operation shaft 10 to the motor 11. The driving position can be changed freely.

Further, the interlocking mechanism 19 includes the rotational operation shaft 1
Interlocking arm 18 that is rotatably attached to 0
and a motor-side interlocking member 16 that interlocks with the output shaft 13 of the motor 11, and the motor-side interlocking member 16 and the interlocking arm 18 are interlocked at a location eccentric to the rotary operation shaft 10. The connecting shaft 17 is attached to the free end side of the swing arm 18. As shown in FIG. 1, the motor 11 is driven and operated by an operation switch 20 attached to the control handle 4, and the tail wheel 6 is driven up and down with respect to the machine body to change and set the plowing depth. .

The rotating member 16 and the connecting shaft 17 are configured to contact and interlock, and the rotating member 16 is configured to be able to be connected and separated from the connecting arm 18 between the connecting shaft 17 and the motor side support member 14. By removing the lock pin 21 inserted across the support cylinder side support member 15, the motor 11 and the rotating member 16 can be connected and separated from the interlocking arm 18, as shown by imaginary lines in FIG. , and the interlocking arm 18 is moved to a release position where the upper portion of the interlocking arm 18 is released. Support member 1
It is configured to be able to swing around the axis of the pivot connecting pins 22 of 4 and 15, and when the motor 11 cannot be driven due to a failure or discharge of the battery 3, the interlocking pins 22 can be changed. The arm 18 is used as a handle, and the connecting shaft 17 is used as a grip member, so that the tail wheel 6 can be manually raised and lowered.

[Application example]

In order to enable manual lifting and lowering of the tail wheel 6, the motor 11 and the rotating member 16 may be removed from the support cylinder side support member 15.

The grounding tail wheel 6 can be changed to 〓, and these are collectively referred to as the grounding body 6 for setting the plowing depth.

[Brief explanation of drawings]

The drawings show an embodiment of the walk-behind cultivator according to the present invention, with FIG. 1 being an overall side view and FIG. 2 being a partially cutaway side view of the ground-contact tailwheel lifting/lowering operation structure. 1... Traveling wheel, 5... Tilling rotary, 6
...Grounding body, 10... Rotation operation shaft, 11... Motor, 16... Motor side interlocking member, 17... Connection shaft, 18... Interlocking arm, 19... Interlocking mechanism.

Claims (1)

[Claims for Utility Model Registration] A plowing rotary 5 is connected to the rear of a self-propelled vehicle having running wheels 1 disposed at one location in the longitudinal direction of the vehicle when viewed from the side, and a frame of the self-propelled vehicle. A walk-behind cultivator is provided with a grounding body 6 for setting tillage depth that can be raised and lowered with respect to 8, and the grounding body 6 for setting tillage depth is connected to the frame 8 of a self-propelled machine body via a drive device. The driving device is provided with a cylindrical shaft 7 that is integral with the grounding body 6.
, a rotary operation shaft 10 for raising and lowering the ground body which is rotatably attached to the fuselage frame 8 side and is internally screwed into the cylindrical shaft 7; a motor 11 serving as a power source; It is composed of an interlocking mechanism 19 that interlocks the rotation operation shaft 10, and the interlocking mechanism 19
an interlocking arm 18 that is integrally rotatably attached to the rotary operation shaft 10, a motor-side interlocking member 16 that interlocks with the output shaft 13 of the motor 11, and this motor-side interlocking member 16 and the interlocking arm. 18
and a connecting shaft 17 attached to the free end side of the swing arm 18 so as to interlock at a location eccentric to the rotary operation shaft 10, and further, the motor side interlocking member 16 , is configured to be able to be connected to and separated from the connecting shaft 17, and when the motor side interlocking member 16 and the motor 11 are in a state where the interlocking with respect to the connecting shaft 17 is released, the interlocking arm 18 and the connecting shaft 17 are connected to each other. A walk-behind cultivator that is attached to a position that can be freely changed to a position outside the rotation locus as it rotates around the rotary operation shaft 10.