JPH0446497Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention has a tilling rotary and a tilling depth setting device installed at the rear of a self-propelled machine that has running wheels arranged at one location in the longitudinal direction of the machine when viewed from the side. By installing a grounding body for use in a row, and supporting the ground with each of the traveling wheels and the grounding body, the ground attitude of the self-propelled aircraft in side view is set so that the depth of penetration of the tilling rotary into the ground becomes the set value. This invention relates to a walk-behind cultivator configured to set depth.

[Prior art]

In the above-mentioned walk-behind tiller, if the installation height of the grounding body is constant, when the wheels climb onto a raised part of the ground, the self-propelled machine will take a forward-climb position compared to the set position, and the tilling rotary When the ground penetration depth of the rotary becomes shallower than the set value and the wheels fall into a concave part of the ground, the self-propelled aircraft assumes a forward downward attitude than the set attitude, and the tillage rotary's ground penetration depth becomes deeper than the set value. In the past, there was a device that was configured to be able to prevent posture changes caused by such unevenness of the ground, and the grounding body could be manually raised and lowered relative to the self-propelled body.

[Problem that the invention attempts to solve]

In the case of walk-behind tillers, it is necessary to support the control handle, and it is difficult to raise and lower the ground contact while holding the control handle with one hand, and the posture of the self-propelled machine due to uneven ground Since it is not possible to accurately know the amount of change and it is almost impossible to operate the ground contact body accurately so that there is no excess or deficiency in the amount of elevation, in reality it is not possible to adjust the plowing depth, and the If there were any unevenness, the finish would be poor in accuracy with unevenness on the surface of the tiller.

The purpose of this invention is to make it possible to keep the plowing surface level or close to it regardless of the unevenness of the ground, to set the plowing depth accurately and easily, and to have a simple structure. .

[Means for solving problems]

In order to achieve the above object, the present invention is equipped with a tilling rotary and a grounding body for setting the plowing depth at the rear of a self-propelled machine which has running wheels arranged at one place in the longitudinal direction of the machine when viewed from the side. The traveling tiller is provided with a drive mechanism for raising and lowering the grounding body relative to the aircraft body, and an inclination detection mechanism for detecting the longitudinal inclination angle of the self-propelled aircraft body, and the inclination detection mechanism detects the set detection angle. A control mechanism is provided to automatically operate the drive mechanism based on information from the tilt detection mechanism so as to detect the tilt, and the tilt detection mechanism is configured to be able to swing freely around an axis in the lateral direction of the aircraft body. A weight and a switch for detecting the displacement direction of the weight from a set reference position, which is a relative attitude position of the weight set in advance with respect to the self-propelled aircraft, are attached to the self-propelled aircraft, and the switch is connected to the A plowing depth indicator, which is provided with a switch adjustment part that changes its position around the axis and is provided with a plowing depth scale, is attached to the self-propelled machine in a state that it moves together with the switch, and an index indicating the scale is attached , which adopts a configuration in which the display device is moved by gravity in the direction of scale arrangement with respect to the display device as the self-propelled aircraft tilts back and forth, and the functions and effects based on this configuration are as follows. That's right.

[Effect]

When the self-propelled machine is supported by the wheels and the ground body in a position where the tilling rotary is in contact with the ground surface, and the detection switch position is set so that the index indicates the tilling depth zero scale, the tilling The plowing depth scale and detection switch are arranged so that the grounding body is automatically raised and lowered until the depth becomes zero. Then, with the self-propelled machine in the above-mentioned position where the tilling rotary is in contact with the ground surface, if the detection switch position is adjusted and set so that the index indicates the scale corresponding to the desired tilling depth value, the desired tilling depth value can be determined. The front and back inclination angle of the self-propelled machine to reveal the soil becomes the set detection angle, so that in the working state, the working depth of the tilling rotary becomes the set plowing depth value or a value close to it, regardless of the unevenness of the ground. , the control mechanism automatically operates the drive mechanism to raise and lower the grounding body. In this way, maintaining the plowing depth at the value of the plowing depth scale set as indicated by the index in the above-mentioned ground attitude state of the self-propelled machine is possible because the index is a gravity type. You can also replace it with a different one.

By detecting the attitude of the self-propelled machine using a weight and a detection switch, it is possible to compare and determine the values detected by the plowing depth setter and potentiometer with the set value by the setter, just like when using a potentiometer. There is no need to provide a complicated mechanism such as a mechanism for

[Effect of idea]

By maintaining the attitude of the self-propelled machine at the set attitude or something close to it regardless of the unevenness of the ground, it has become possible to make the plowing surface level or something close to it.

The actual plowing depth can be maintained at the desired plowing depth simply by aligning the scale corresponding to the desired plowing depth with the index, and since the index is a gravity type, the diameter of the wheel or tilling rotary can be adjusted. The same thing applies when replacing with a different one, so
Regardless of whether or not the wheels or tilling rotary are replaced, the tilling depth can now be set easily and accurately by simply adjusting the position of the tilling depth scale with respect to the index.

Since a circuit for comparing and determining signals and a plowing depth setting device for inputting a set plowing depth signal to the circuit are not required, the structure of the control circuit can be simplified.

〔Example〕

As shown in Fig. 3, a self-propelled aircraft has a pair of left and right running wheels 1, 1, an engine 2, a control handle 3, a battery 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 grounding tail wheel tail 6 arranged to act after tilling by the rotary 5 is connected to the rear of the machine, and is configured to transmit power from the self-propelled body to the tilling device. Then, wheel 1 and tail wheel 6
Accordingly, the walk-behind cultivator is configured to work while supporting the self-propelled machine body on the ground in a posture in which the depth of penetration of the rotary tiller 5 into the ground reaches a set value.

As shown in FIG. 1, the support shaft 7 of the tail wheel 6 is
It is attached to a support tube 8 fixed to the tillage device body so that it can be slid up and down by rotating a screw shaft 9, and a bevel gear type interlocking mechanism 10, a worm gear type reduction mechanism 11, etc. are attached to the screw shaft 9. The transmission motor 12 is interlocked through the motor 1.
2, the tail wheel 6 can be raised and lowered relative to the aircraft, and the forward and backward inclination angle of the self-propelled aircraft can be adjusted. Behind the axle, the self-propelled aircraft frame 1
3, a weight 16 is suspended from a support shaft 15 fixed to the support member 14 through a support member 14 so as to swing around the axis P of the support shaft 15 in the transverse direction of the fuselage. A pair of switches 18a,
18b as the weight 1 as the weight 16 swings against the supporting member.
The switch operating arm 19a or 19b, which swings together with the switch 6, is attached so that it is in contact with or apart from the switch,
By configuring the swing position and swing direction of the weight 16 with respect to the support member 14 to be detected by the switches 18a and 18b, the longitudinal inclination angle of the self-propelled aircraft is detected and the detection results are obtained electrically. A tilt detection mechanism is constructed for this purpose. That is, when both switches 18a and 18b are in the non-operated state, it is detected that the weight 16 is in the reference range A as the support member setting reference position, and either one of the switches 18a or 18b is in the non-operated state. When the switch 18b is in the operating state by the operating arm 19a or 19b, it is detected that the weight 16 has been displaced from the setting reference range A, and further, depending on which switch 18a or 18b is in the operating state, The direction of displacement of the weight 16 from the set reference range A is detected. Both the switches 18a, 18b and the drive circuit 20 of the motor 12 are linked via a control mechanism 21, and the control mechanism 21 is brought into a state where the tilt detection mechanism detects the set detection angle. The motor 12 is configured to be automatically operated based on information from the inclination detection mechanism. That is, when the weight 16 is within the set reference range A, the inclination detection mechanism enters the state of detecting the set detection angle, and the control mechanism 21 detects that the weight 16 is within the set reference range A. The drive circuit 20 is configured to automatically operate the drive circuit 20 into a forward motor rotation operation state, a motor reverse operation operation state, or a motor stop operation state based on information from both switches 18a and 18b so that the switches 18a and 18b are in the detection state of Regardless of the unevenness of the traveling ground, the ground tail wheel 6 is automatically raised and lowered relative to the machine so that the self-propelled machine is in a posture above the ground where the plowing depth is at or close to the set value. It is designed so that you can work while keeping it on a nearly horizontal surface.

By configuring the switch mounting disc 17 so that it can be rotated about its axis P with respect to the support shaft 15, a switch adjustment section for changing the positions of the switches 18a and 18b is constructed. .
That is, by rotating the disc 17,
Both switches 18a, 18b can be adjusted in position relative to the support member 14 around the axis P integrally and in the same direction, and the switch mounting disk 1
7 and the support shaft 15 so that it can be fixed at the adjusted position. A plowing depth scale 22 is provided on the disk 17 so as to move integrally with both switches 18a and 18b around the axis P, and a level 23 is installed to adjust the air bubbles 2 as the self-propelled aircraft tilts back and forth.
4 is attached to the support member 14 so as to be moved by gravity in the direction in which the plowing depth scales 22 are arranged with respect to the switch attachment disk 17. Then, the self-propelled aircraft is supported by the wheels 1 and the tail wheel 6 in a ground position where the tilling rotary 5 is in contact with the ground surface, and the tilling depth zero scale a is set to the air bubble 2 as shown in FIG.
When the mounting positions of both switches 18a and 18b are adjusted and set as instructed by 4, the actual plowing depth is in a state of plus or minus zero, that is, tilling rotary 5
The tail wheel 6 is controlled to ascend and descend without entering the soil or rising above the ground surface, and
As shown in FIG.
When the mounting position of 8b is adjusted and set, the tilling depth scale 22 and both switches 18a and 18b are adjusted so that the tail wheel 6 is controlled to raise and lower so that the actual tilling depth becomes the value on the scale a. has been placed and set.

In other words, when the self-propelled machine is in the above-mentioned ground support posture where the tilling rotary 5 is in contact with the ground surface, the mounting positions of both switches 18a and 18b are adjusted so that the bubble 24 indicates the scale 22 indicating the desired plowing depth value. By setting, the plowing depth to be maintained by the tail wheel elevation control is set.

25a and 25b shown in FIGS. 1 and 2 are
In order to prevent the switches 18a, 18b from being damaged by the operation arm 19a or 19b, the weight 1
This is a stopper that determines the swing limit of 6. The switch 26 shown in FIG. 1 is for switching the control mechanism 21 between an automatic mode in which the grounding tail wheel 6 is automatically operated and a manual mode in which the grounding tail wheel 6 is manually operated. , for manually raising and lowering the ground tail wheel 6.

[Application example] Instead of the bubble 24, the axis P with respect to the disk 17
In addition to being attached so that it can be oscillated around the surroundings, a pointer connected to a weight may be used so that it moves relative to the disk as the self-propelled aircraft tilts back and forth; These are collectively referred to as indicators 24 that are moved by gravity in the scale arrangement direction.

The plowing depth scale 22 may be provided separately from the switch mounting member, or may be provided on a dedicated member that is interlocked with the switch so as to move integrally therewith, and the disc 17 is referred to as a plowing depth indicator 17.

The motor 12 can be replaced with a fluid pressure cylinder, and these are collectively referred to as a drive mechanism 12.

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

[Brief explanation of drawings]

The drawings show an embodiment of the walking power tiller according to the present invention, in which FIG. 1 is a plowing depth control system diagram, FIG. 2 is a diagram showing the procedure for setting the plowing depth, and FIG. 3 is a side view of the entire tiller. 1... Traveling wheel, 5... Tilling rotary, 6
...Grounding body, 12... Drive mechanism, 16... Weight,
17... Tilling depth indicator, 18a, 18b... Switch, 21... Control mechanism, 22... Tilling depth scale, 2
3...Level, 24...Indicator, A...Setting reference position.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A tilling rotary 5 and a grounding body 6 for setting the plowing depth are installed at the rear of a self-propelled machine body having running wheels 1 arranged at one place in the longitudinal direction of the machine body when viewed from the side. The traveling tiller is connected in series, and is provided with a drive mechanism 12 for raising and lowering the grounding body 6 relative to the aircraft, and an inclination detection mechanism for detecting the longitudinal inclination angle of the self-propelled aircraft. A control mechanism 21 is provided that automatically operates the drive mechanism 12 based on information from the tilt detection mechanism so as to be in a state of detecting a detection angle, and the tilt detection mechanism is configured such that the axis P in the lateral direction of the aircraft A weight 16 that can freely swing around the weight 16 and the weight 16 from a set reference position A which is a relative attitude position of the weight 16 that is set in advance with respect to the self-propelled aircraft.
switches 18a and 18b for detecting the direction of displacement of
attached to the self-propelled aircraft, and further provided with a switch adjustment section for changing the position of the switches 18a and 18b around the axis P,
Tilling depth indicator 17 equipped with tilling depth scale 22
is attached to the self-propelled aircraft while moving together with the switches 18a and 18b, and an indicator 24 indicating the scale 22 is moved in the scale arrangement direction with respect to the indicator 17 as the self-propelled aircraft tilts forward and backward. A traveling tiller installed in a state where it is moved by gravity. 2. The traveling tiller according to claim 1, wherein the indicator 24 is a bubble in the level 23. 3 The plowing depth indicator 17 is attached so as to be rotatable around the axis P, and the switch 18
a, 18b to the plowing depth indicator 17,
The plowing depth indicator 17 and the switch 18a, 1
8b. The traveling type tiller according to claim 1, which is capable of being moved integrally with the utility model registered claim 8b.