JPH0214324Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a self-propelled machine equipped with a tilling rotary behind the propulsion wheels, and a grounding body for setting the tilling depth of the rotary is connected to the rear end of the machine. The grounding body can be raised and lowered freely by a drive mechanism, and the grounding body is automatically controlled to raise and lower based on the tilt sensing operation of a tilt sensor installed on the aircraft side that detects the longitudinal tilt of the aircraft, and the aircraft is tilted forward and backward. The present invention relates to a walk-behind cultivator configured to maintain the temperature within a set range.

[Conventional technology]

Conventional inclination sensors include a limit switch that detects the swing of a weight that is swingable around the horizontal support axis of the aircraft body that exceeds a set range, and a limit switch that is fixed to the center of this axis relative to the horizontal support axis. It consisted of a circular plate fitted around the circumference via a friction retention mechanism so that it could be rotated and fixed (for example, in 1983-
No. 177717).

[Problem that the invention attempts to solve]

Therefore, as shown in Figure 3B, in the case of so-called zero plowing depth setting work, in which the machine is changed to a larger diameter wheel for puddling tillage work and the attitude of the machine is set within the approximately horizontal setting range, the wheel The grounding body is raised and lowered until the tilling rotary is in contact with the ground, and the grounding state is visually determined.Then, the disc is returned to the zero setting position against the frictional holding force, and the weight 1 is
After confirming that 6 is within the standard setting range B,
The tilling depth can be set by rotating the disc again. However, since this type of work to set the zero plowing depth is necessary when the aircraft reference attitude changes due to wheel replacement, etc., if this work becomes frequent, it becomes necessary to rotate the disc to align the marks. This became a nuisance, and since it was combined with the wheel replacement work, the nuisance became even more troublesome.

The purpose of the present invention is to provide a tool that allows easier adjustment of the scale for setting zero plowing depth through simple modifications.

[Means for solving problems]

The characteristic structure of the present invention is that the inclination sensor is a weight that can swing freely around the horizontal axis of the aircraft, a switch that senses when the weight swings beyond the set range, and this switch is fixed. The case is freely rotatable around the horizontal axis and is always gravity-biased downward by a weight mechanism, and the tilling depth is set according to the tilling depth setting mark marked on the fixed frame side. The case is constructed with a locking mechanism that can fix the position, and its functions and effects are as follows.

[Effect]

In other words, when setting the zero plowing depth after replacing the wheels, simply releasing the lock mechanism allows the synergistic effect of the weight mechanism and the loosely fitted support state to the horizontal support shaft of the machine to reduce the load on the disc of the conventional structure. This can be done by automatically setting the case itself in a vertical position and moving the grounding body up and down so that the case in this vertical position matches the mark on the aircraft body.
More specifically, when setting the zero plowing depth, the work that conventionally involved rotating the disc after confirming the contact of the rotary and grounding body with the ground can now be done with just one touch to release the locking mechanism. Even if the disk is rotated again for setting, this work, which is performed as a series of work, can be done easily and quickly compared to conventional work, and the labor required for operation can be significantly reduced.

[Effect of idea]

As a result, we have been able to reduce the complexity of the zero plowing depth setting operation and provide something that can be used more effectively for this type of work that is required in conjunction with wheel replacement.

〔Example〕

As shown in FIG. 4, a pair of left and right propulsion wheels 1,
At the rear end of the self-propelled aircraft with a tilling rotary 2 behind the rotary 1, an engine 3 at the front of the aircraft, and a control handle 4 extending toward the rear of the aircraft, there is a grounding body arranged so as to act after tilling by the rotary 2. One tail wheel 5 is installed in series, and the tail wheel 5 can be raised and lowered freely by a drive mechanism 6, and can be operated to detect a tilt above a set value of a tilt sensor 7 that detects the tilt of the aircraft in the longitudinal direction. Based on this, the tail wheel 5 is configured to be able to be automatically raised and lowered, and the walking type cultivator is configured such that the depth of penetration of the tilling rotary 2 into the ground becomes a set value by raising and lowering the tail wheel 5 with respect to the wheel 1. It is configured.

As shown in FIG. 1, a lifting mechanism 6 for the tail wheel 5
In detail, the support shaft 8 of the tail wheel 5 is fitted and held in a support tube 9 fixed to the aircraft body side, and the screw shaft 10 screwed into the axial center position of the support shaft 8 is inserted into the support tube 9. Fix the position inside and hold this screw shaft 1.
0, the tail wheel 5 can be slidably operated via the support shaft 8, and the screw shaft 10 is interlocked with a motor 13 with a reducer 12 via a bevel gear mechanism 11 provided at its upper end. A driving mechanism 6 is configured by connecting them.

To explain the inclination sensor 7 in detail, this axis P is attached to the horizontal support shaft 15 provided on the body frame 14
A weight 16 is hung so as to be able to swing around it, and
A pair of switches 18a and 18b are attached to the case 17 attached to the horizontal support shaft 15 in a state where they are distributed on the left and right sides with respect to the weight 16, and the switches 18a and 18 are attached to the support arm 19 that supports the weight 16.
The actuating parts 19a and 19b for b are connected to the weight 1
It extends so as to come into contact with the switch 18a or 18b by swinging beyond the standard setting range B of No. 6. That is, the switches 18a, 18b
In the state in which the weight 16 is not operating, the weight 16 is within the reference setting range B. In other words, the weight 16 will not sense an inclination that exceeds the set value, and the plowing depth will be kept constant regardless of slight irregularities on the field surface, thereby preventing frequent operation of the tail wheel 5. There is. Also, either one of the switches 18a or 1
8b is activated, the aircraft body tilts in the direction in which the switch is installed, and since the tilt is greater than the set value, the signals from the switches 18a and 18b are transmitted to the motor 13 via the control circuit 22, The tail wheel 5 is raised and lowered to return the machine to a substantially horizontal position, and the rotary 2 is arranged to follow the slope of the field.

As shown in FIGS. 1 and 2, the case 1
7 is freely rotatably supported on the horizontal support shaft 15, and a weight mechanism 20 is fixed to the lower end of the case 17 for simply gravity-biasing the case 17 downward. The guide plate 23 is configured to be movable and has a stud bolt 21 protruding from the lateral side of the case, and a guide plate 23 formed with an engagement groove 23A for engaging and guiding the stud bolt 21 as the case 17 rotates. a locking mechanism 26 that can fix the case 17 at any position by tightening a nut with a knob 25 extending from the stud bolt 21 and threadedly engaged with the stud bolt 21;
Configure. A mark 27 for setting the plowing depth is provided on the fixed frame 24 side of the case 17.
At the same time, mark the plowing depth setting scale 2 on the case 17.
8 is provided to constitute the tilt sensor 7.

With the above configuration, when the standard posture of the machine is changed, such as by replacing the propulsion wheel 1 with a larger diameter one for puddling tillage work, etc., the lock mechanism 26 is released and the case 17 is closed. In the free position, the tail wheel 5 is raised and lowered, and the zero scale of the plowing depth scale on the case side matches the mark 27,
The lifting operation can be stopped and the machine body can be returned to the reference posture of the zero plowing depth state in a substantially horizontal position, and the manual setting operation of the case itself related to the zero plowing depth setting work of the case 17 can be easily performed.

With the zero plowing depth set as described above, as shown in FIG. 2, by rotating the case 17 to the desired plowing depth setting and tightening the lock nut 25, Plowing depth can be set.

[Another Embodiment] As shown in FIG. 5, a support arm 19 for the weight 16 is swingably supported on the horizontal support shaft 29 of the case 17, and switches 18a and 18b for this support arm 19 are provided internally. The case 17 is pivoted on the horizontal support shaft 15 on the side of the fuselage frame at the left-right center and above the center of gravity so as to be swingable around the axis P, and the case 17 itself is configured to double as a weight mechanism 20. , an engagement hole 30 is provided on the body frame side of the pin holder 17A protruding from the case 17, into which an insertion pin held by the pin holder 17A can be inserted and removed.
The lock mechanism 26 is also constructed by providing a lock mechanism 26.

The grounding body 5 may be a sled.

[Brief explanation of the drawing]

The drawings show an embodiment of the walk-behind cultivator according to the present invention, in which FIG. 1 is a front view showing an inclination sensor, a grounding body, and a drive mechanism, and FIG. 2 is a front view showing the setting state of the tilling depth of the inclination sensor. Figures 3A and 3B show schematic side views, A is the zero plowing depth setting state in dry fields, B is the zero plowing depth setting state during puddling tillage, Fig. 4 is an overall side view, and Fig. 5 is the inclination sensor. It is a front view which shows another Example. DESCRIPTION OF SYMBOLS 1... Propulsion wheel, 2... Tilling rotary, 5... Grounding body, 6... Drive mechanism, 7... Inclination sensor, 16... Weight, 17... Case, 18a, 18b... Switch,
24...Fixed frame, 26...Lock mechanism, 27...
Plowing depth setting mark, P...axis center.

Claims (1)

[Claims for Utility Model Registration] A grounding body 5 for setting the plowing depth of the rotary 2 is connected to the rear end of a self-propelled machine having a tilling rotary 2 behind the propulsion wheels 1, and this grounding body 5 is driven. The grounding body 5 can be raised and lowered freely by a mechanism 6, and based on the tilt sensing operation of a tilt sensor 7 provided on the fuselage side that senses the tilt of the fuselage in the longitudinal direction, the grounding body 5 is automatically controlled to raise and lower to maintain the tilted posture of the fuselage. In a walk-behind cultivator configured to maintain within a set range, the inclination sensor 7 is connected to a weight 16 that is swingable around the machine's horizontal axis, and the weight swings beyond the set range. Switches 18a and 18b that sense displacement; a case 17 to which the switches 18a and 18b are fixed and freely rotatable around a horizontal axis and always gravity-biased downward by a weight mechanism 20; ,
The case 17 is used to set the plowing depth according to the plowing depth setting mark 27 marked on the fixed frame 24 side.
This walk-behind cultivator is constructed with a lock mechanism 26 that can fix the position of the tiller. The walk-behind cultivator according to claim 1, wherein the weight mechanism 20 is also used by the weight of the case 17 itself.