JPH06276804A - Sensor device in agricultural work machine - Google Patents

Abstract

PURPOSE:To facilitate the attaching and detaching works, etc., of a sensor loaded on a working machine, when the working machine attached to a tractor is exchanged with a different kind of the working machine. CONSTITUTION:A sensor box 12 equipped with a solar battery 15, an inclination angle sensor 18 and a non-wire type transmitter 19 for transmitting a detection signal from the sensor is detachably disposed on a rotary tiller 3 pulled with a tractor 1, and a controller box 14 having a controller 21 and a non-wire type receiver 20 for receiving a signal from the transmitter 19 is loaded on the tractor 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sensor device such as an inclination sensor in an agricultural working machine such as a tractor.

[0002]

2. Description of the Related Art When a work machine is towed by a towing vehicle such as a tractor, there is a case where it is desired to keep the left and right tilting attitude of the work machine constant regardless of the left and right tilting attitude of the towing vehicle. For example, when a substantially horizontal ridge is formed on a sloped surface of a mountain or the like by a tiller that is towed by a tractor along the contour line, the tractor should be substantially along the sloped surface, that is, on the valley side. It is necessary to control the posture of the tillage implement itself so that the left and right sides are horizontal while moving forward while tilting low.

As a conventional technique therefor, a full-fledged Shokai 60-
In No. 151310, a tractor and a rotary cultivator to be pulled up and down by the tractor are provided with left and right inclination sensors, respectively, while a pair of left and right lifting links for vertically rotating the rotary cultivator are provided with vertical movement position sensors. And a hydraulic cylinder that expands and contracts between one of the pair of left and right lifting links, and holds the ground height of the rotary tiller at a set value by a predetermined calculation from the detection values of these sensors. At the same time, it is disclosed that the left and right tilts of the rotary tiller are controlled.

[0004]

By the way, since the power supply unit and the controller (electronic control unit) are usually mounted on the tractor side, the power cord from the controller to the left and right tilt sensor and the right and left tilt sensor to the controller are connected. The signal code is laid and laid at appropriate points on the lifting link. Therefore, in order to prevent the signal cords and the power cords from being broken during the lifting operation of the lifting link, it is necessary to have a margin in the length of the cords, but there is also a problem that the places where these cords crawl are also limited. there were.

Further, when a work machine of a different type is to be replaced with respect to a towing vehicle such as a tractor, since the work machine itself has a left and right inclination sensor, it is necessary to replace the cord. Since the left and right tilt sensors are attached to each work machine, even with the same type of sensor,
There is a problem that a large number of the sensors are required.

Such a problem also occurs when the sensor is a ground height detecting sensor. The present invention aims to solve these problems all at once.

[0007]

In order to achieve the above object, the present invention provides a working machine such as a rotary tiller which is towed by a towing vehicle such as a tractor, a solar cell, a working machine state detecting sensor and the sensor. While a sensor box provided with a non-wired transmission unit for transmitting a detection signal from is detachably provided, the towing vehicle is equipped with a power supply and a controller,
The controller is provided with a non-wired type reception unit that receives a signal from the transmission unit.

[0008]

[Embodiments] Next, embodiments embodying the present invention will be described. 1 is a plan view of a tractor and a rotary tiller,
2 is a side view, and FIG. 4 is a perspective view of the sensor box and the controller box, respectively. At the rear end of the tractor 1 as a towing vehicle, the base ends of a pair of left and right connecting links 2 and 2 are pivotally supported in a vertically rotatable manner, and the tip ends of the pair of connecting links 2 and 2 are rotary tillers as working machines. It is rotatably connected to the machine 3. At the rear end of the tractor 1, a pair of left and right lifting links 5 and 5 arranged above the connecting links 2 and 2 is configured to be driven up and down through a lifting hydraulic mechanism 4, and one lifting link 5 and The lower connecting link 2 is connected by a connecting rod 6, while the other elevating link 5 and the lower connecting link 2 are connected by a hydraulic cylinder 7 capable of expanding and contracting.

The hydraulic pressure applied to the lifting hydraulic mechanism 4 and the hydraulic cylinder 7 is supplied to an engine (not shown) mounted on the tractor 1.
It is supplied by a hydraulic pump that operates with the rotational driving force of. With these configurations, the rotary tiller 3 moves up and down at the same time with respect to the tractor 1 and the left and right of the rotary tiller 3 are moved by the operation of the hydraulic cylinder 7.
You can tilt to the left or right.

The power from an engine (not shown) mounted on the tractor 1 is transmitted to the rotary tiller 3 through the PTO shaft 8 extending rearward at the rear end of the tractor 1 and a universal joint, and the rotary tiller claws are provided. 9 is rotationally driven. Reference numeral 10 is a leveling plate made of a rubber plate or the like, and reference numeral 11 is an auxiliary wheel provided behind the leveling plate 9. As shown in FIGS. 2 and 4, the sensor box 12 has a suction plate 13 attached to the lower surface thereof.
Is detachably mounted on the rotary tiller 3 and the controller box 14 is mounted on the rear part of the tractor 1. A large number of solar cells 15 are stretched on the upper surface of the sensor box 12, and power is supplied to the control unit 17 via an internal charging circuit 16.

In the sensor box 12, a tilt angle sensor 18 for detecting the horizontal tilt of the rotary tiller 3 is built in as a working machine state detection sensor in this embodiment.
The detection value of the tilt angle sensor 18 is amplified by the control unit 17 and transmitted from the non-wired transmission unit 19 to the non-wired reception unit 20 in the controller box 14. In this case, the transmission unit 19 and the reception unit 20 may be a radio wave type such as an FM wave, an optical communication system such as an infrared ray or a laser beam, or an ultrasonic type.

The controller 21 in the controller box 14 is activated by a power cord 24 from a power source such as a storage battery in the tractor 1. And the receiving unit 2
The signal received at 0 is input to the controller 21, and the state (posture) of the rotary tiller 3 is determined by a predetermined calculation,
When the hydraulic cylinder 7 is operated via the drive circuit (control valve) 22, the left and right of the rotary tiller 3 can be corrected and held in a horizontal state orthogonal to the vertical regardless of the left and right tilt posture of the tractor 1. Further, a detection signal from a tilling depth sensor (not shown, provided with a sensor detection unit outside a sensor box including a solar cell, a control unit and a transmission unit similar to the above) mounted on the rotary tiller 3 The hydraulic mechanism 4 is operated via the drive circuit 23 so that a predetermined tilling depth is achieved under the control of the controller 21 by the receiving unit 20.

According to this structure, when the working machine is replaced by the rotary tiller 3 and the ridge riser or the multi-film laying machine is attached by pulling it by the tractor 1, the sensor box 12 is replaced. It is not necessary to replace the controller box 14 mounted on the tractor 1 side or the wiring, just by replacing the work machine.
The work implement can be replaced very easily.

Note that, as shown in FIG. 6, the sensor box 12 and the controller box 14 may be arranged so that the transmitting unit 19 and the receiving unit 20 are at the same horizontal height position. As the working machine state detection sensor provided in the sensor box 12, in addition to the left and right tilt sensor, a longitudinal rotation angle sensor for detecting the pitching state of the working machine and a vertical axis for detecting the yawing state of the working machine. The rotation angle sensor or the rotation angular velocity sensor may be used.

[0015]

As described above, according to the present invention, a working machine such as a rotary tiller towed by a towing vehicle such as a tractor has a solar cell, a working machine state detection sensor, and detection from the sensor. A sensor box having a non-wired transmission unit that transmits a signal is detachably provided, while a power source and a controller are mounted on the towing vehicle, and the controller is a non-wired unit that receives a signal from the transmission unit. It is provided with a receiving part of the formula.

Therefore, according to the present invention, since there is no need for a signal cord or a power cord connecting the controller and the working machine state detection sensor as in the prior art, there is no fear of disconnection and the mounting location of the sensor box is limited. There is no. Further, when a work machine of a different type is reattached to a tow vehicle such as a tractor, it is sufficient to attach and detach the sensor box to and from the work machine. Therefore, the work of replacing the cord is unnecessary, and the work machine of the same type. In the case of the state detection sensor, since only one sensor is required, the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a plan view of a tractor and a rotary tiller.

FIG. 2 is a side view of a tractor and a rotary tiller.

FIG. 3 is a view taken along the line III-III in FIG.

FIG. 4 is a perspective view of a sensor box and a controller box.

FIG. 5 is a block circuit diagram of a sensor and a controller.

FIG. 6 is a side view showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 tractor 2,2 connection link 3 rotary tiller 4 hydraulic mechanism for lifting 5,5 lifting link 7 hydraulic cylinder 12 sensor box 13 suction board 14 controller box 15 solar cell 17 control block 18 tilt angle sensor 19 transmitter 20 receiver 21 controller

Claims (1)

[Claims] 1. A work machine such as a rotary cultivator towed by a towing vehicle such as a tractor is provided with a solar cell, a work machine state detection sensor, and a non-wired transmission unit that transmits a detection signal from the sensor. A sensor box provided therein is detachably provided, while a power source and a controller are mounted on the towing vehicle, and the controller is provided with a non-wired type receiving unit for receiving a signal from the transmitting unit. Sensor device for agricultural machinery.