JP2022029156A - Connector connection system for agricultural work machine - Google Patents

Abstract

To provide a connector connection system for an agricultural work machine that allows a connector to be covered appropriately without using a separate cover in an electric wire connector used for an agricultural work machine mounted onto a tractor.SOLUTION: A connector connection system for an agricultural work machine used for an agricultural work machine 2 for executing agricultural work mounted on a tractor 1 includes: control equipment 10 provided to the agricultural work machine 2; a first connector 16 connected to the control equipment 10 through wiring; and a second connector 17 connected to the control equipment 10 through wiring. The first connector 16 and the second connector 17 are attachable and detachable each other. The control equipment 10 includes a connection part to which the wiring is connected, input circuits 12a-12k connected to the connection part, and protection means 13a-13k provided between the connection part and the input circuits 12a-12k. The protection means 13a-13k are set so that electric current flows from the input circuits 12a-12k only in the direction of the connection part.SELECTED DRAWING: Figure 5

Description

The present invention relates to a connector connection system for agricultural work machines, and more particularly to a connector connection system for agricultural work machines used for agricultural work machines mounted on a tractor.

Since the agricultural work machine attached to the tractor can perform different agricultural work depending on the type of the agricultural work machine to be attached, it is frequently performed to remove the agricultural work machine from the tractor or attach the agricultural work machine to the tractor. On the other hand, in many cases, a harness for operating the equipment provided in the farm work machine or for transmitting information is connected between the tractor and the farm work machine. When removing the agricultural work machine from the tractor, there are many configurations in which the connector provided in the middle of the harness can be removed.

However, since the contact of the removed connector is exposed, corrosion or the like is likely to occur, and if left unattended, problems such as poor connection and short circuit occur. Therefore, when not connected, a method of attaching a separate cover to the connector can be considered.

On the other hand, Patent Document 1 discloses a harness corresponding to a plurality of types of connectors.

Japanese Unexamined Patent Publication No. 2016-208874

If a separate cover is connected when the connector is not connected, this cover is not used when the connector is connected, so there is a risk of loss. Once the cover is lost, it takes time to order the parts and it is possible that the cover may be left unattached. This increases the probability that problems such as poor connection and short circuit will occur.

Further, in Patent Document 1, it is possible to cover all the connectors by using the end connecting member on the tractor side. However, here, it is premised that the end connecting member on the tractor side is used, and since it is a separate part, there is a risk that it may be dropped and lost at the time of attachment / detachment.

In view of the above problems, the present invention provides a connector connection system for agricultural work machines, which can appropriately cover a connector for wiring used for an agricultural work machine to be mounted on a tractor without using a separate cover. The purpose.

In order to achieve the above object, one of the representative connector connection systems for agricultural work machines of the present invention is provided in the agricultural work machine in the connector connection system for agricultural work machines which is attached to a tractor and used for agricultural work. It includes a control device, a first connector connected to the control device via wiring, and a second connector connected to the control device via wiring, and the first connector and the second connector are detached from each other. It is possible, and the control device includes a connection portion to which the wiring is connected, an input circuit connected to the connection portion, and a protective means provided between the connection portion and the input circuit. The protective means is set so that current can flow only in the direction of the connection portion from the input circuit.
Further, one of the connector connection systems for agricultural work machines of the present invention is characterized in that the protective means is configured by using a diode.

Further, one of the connector connection systems for agricultural work machines of the present invention includes an input device, a first connector connected to the input device via wiring, and a second connector connected to the input device via wiring. A connector is provided, and the first connector and the first connector are detachable, and the second connector and the second connector are detachable.
Further, in one of the connector connection systems for agricultural work machines of the present invention, the input device has a switch, connects the first connector and the first connector, and connects the second connector and the second connector. In the connected state, the input circuit is characterized in that it detects ON and OFF of the connected switch.
Further, one of the connector connection systems for agricultural work machines of the present invention is characterized in that the first connector and the second connector are detachable.

Further, one of the connector connection systems for agricultural work machines of the present invention includes a sensor, the sensor is connected to the second connector via wiring, and the control device can detect ON and OFF of the sensor. It is characterized by having an input circuit and protective means set so that a current can flow only in the direction of the sensor from the input circuit.
Further, one of the connector connection systems for agricultural work machines of the present invention includes a variable resistor, the variable resistor is connected to the second connector via wiring, and the control device is a voltage of the variable resistor. It is characterized by having an input circuit capable of detecting a voltage and an overvoltage protection circuit for preventing a voltage higher than a predetermined value from being applied to the input circuit.
Further, in one of the connector connection systems for agricultural work machines of the present invention, the agricultural work machine is provided with an actuator, the control device is provided with a control unit, and the control unit controls the actuator based on information from the input circuit. It is characterized by that.

According to the present invention, in the connector connection system for agricultural work machines, the connector of the wiring used for the agricultural work machine to be mounted on the tractor can be appropriately covered without using a separate cover.
Issues, configurations and effects other than the above will be clarified by the following embodiments.

It is a block diagram which shows one Embodiment of the connector connection system for agricultural work machines of this invention. It is a plan schematic diagram which shows one Embodiment of the connector connection system for agricultural work machines of this invention. It is a perspective view which shows an example of the connector part of the connector connection system for agricultural work machines of this invention. It is a rear view which shows the example of the agricultural work machine applicable to the connector connection system for agricultural work machine of this invention. It is a figure which shows the wiring state at the time of connection in Example 1 of this invention. It is a figure which shows the wiring state at the time of non-connection in Example 1 of this invention. It is a figure which shows the wiring state at the time of connection in Example 2 of this invention.

A mode for carrying out the present invention will be described.

(overall structure)
FIG. 1 is a block diagram showing an embodiment of the connector connection system for agricultural work machines of the present invention.

In FIG. 1, the connector connection system for agricultural work machines includes a control device 10, a harness 15, a first connector 16, a second connector 17, an input device 20, a harness 22, a first connector 26, a second connector 27, and a sensor 31. , The actuator 32 is provided.

The control device 10 controls the actuator 32 based on an electric signal (information) from the input device 20. Here, when the sensor 31 is provided, the information from the sensor 31 may be reflected in the control. Further, an electric signal (information) may be transmitted to the input device 20 side as needed. The control device 10 can be installed on the farm work machine 2 side.

The input device 20 includes a switch, and an electric signal is sent to the control device 10 in response to the switch operation. As the switch, various switches such as a push button switch and a toggle switch can be applied. The number of switches can be set as needed, and the number can be increased to a plurality, 4 or more, or even 8 or more. Further, if necessary, the input device 20 may be provided with an information display unit or the like. The information display unit may be displayed by light emission (for example, an LED lamp or the like). The input device 20 can be installed on the tractor 1 side at a position that is easy for the driver to operate, and can be operated remotely.

The harness 15 is composed of wiring and includes a first harness portion 15A, a second harness portion 15B, and a third harness portion 15C. One end of the first harness portion 15A is connected to the control device 10, the other end serves as a branch point, and one end of the second harness portion 15B and the third harness portion 15C is connected. The first connector 16 and the second connector 17 are connected to the other ends of the second harness portion 15B and the third harness portion 15C, respectively.

The harness 22 is composed of wiring and includes a first harness portion 22A, a second harness portion 22B, and a third harness portion 22C. One end of the first harness portion 22A is connected to the input device 20, the other end serves as a branch point, and one end of the second harness portion 22B and the third harness portion 22C is connected. The first connector 26 and the second connector 27 are connected to the other ends of the second harness portion 22B and the third harness portion 22C, respectively.

The first connector 16 and the first connector 26 are removable, and the second connector 17 and the second connector 27 are removable. Further, the first connector 16 and the second connector 17 are removable, and the first connector 26 and the second connector 27 are removable. FIG. 1 shows a state in which the first connector 16 and the first connector 26, and the second connector 17 and the second connector 27 are connected, and electricity and information are connected between the control device 10 and the input device 20. It is in a state where it can be exchanged.

The sensor 31 is a sensor installed on the farm work machine 2 side, and various types of sensors are provided according to the needs of the farm work machine 2. The sensor 31 is, for example, an acceleration sensor, an angular velocity sensor, an inclination sensor, a geomagnetic sensor, a rotation sensor, a potentiometer, a limit switch, or the like. As a result, it is possible to detect the state of the farm work machine 2 (for example, inclination, work depth, etc.), the state of the farm work machine 2 by the actuator 32, and the like.

The actuator 32 is installed on the farm work machine 2 side. The actuator 32 is, for example, an actuator for moving a part of the agricultural work machine 2 as needed. As the actuator 32, for example, a cylinder such as a hydraulic cylinder or an electrohydraulic cylinder, a motor, or the like can be applied. In particular, by using an actuator that moves the position of the work unit of the agricultural work machine 2, it is possible to control this and improve the workability of agricultural work.

FIG. 2 is a schematic plan view showing an embodiment of the connector connection system for agricultural work machines of the present invention. The left-right direction in FIG. 2 is the lateral direction, and the upward direction in FIG. 2 is the front direction. A farm work machine 2 is attached to the rear of the tractor 1, and the farm work machine 2 is used for farm work.

The input device 20 is arranged on the tractor 1 side, and the control device 10 is installed on the agricultural work machine 2 side. A harness 15 and a harness 22 are connected between them. In FIG. 2, the first connector 16 and the first connector 26, and the second connector 17 and the second connector 27 are connected in the same manner as in FIG. Further, the sensor 31 and the actuator 32 are installed on the farm work machine 2 side. This makes it possible to operate the input device 20 to remotely control the actuator 32.

When separating the connection between the input device 20 and the control device 10, the connection between the first connector 16 and the first connector 26 is removed, and the connection between the second connector 17 and the second connector 27 is removed. Further, the first connector 16 and the second connector 17 are connected, and the first connector 26 and the second connector 27 are connected. This can prevent the connection terminal from being exposed to the outside.

The battery 5 installed on the tractor 1 side can be used as the power source for the control device 10. The battery 5 and the control device 10 are connected by a power harness 6 and are connected via a switch 6a on the way. The switch 6a can be shared with the engine start switch of the tractor 1.

(Example of connector)
FIG. 3 is a perspective view showing an example of a connector portion of the connector connection system for agricultural work machines of the present invention. FIG. 3 shows a diagram in which the male connector 100 and the female connector 200 face each other on the terminal side. Hereinafter, both the male connector 100 and the female connector 200 will be described with the terminal side (connection side) as the front side (front side).

The male connector 100 includes a main body 101 on the front side. The main body 101 has a horizontally long rectangular shape as a whole when viewed from the front, and has rounded corners. Around the top, bottom, left, and right of the main body 101 is a flat outer peripheral portion 101a. The upper surface of the outer peripheral portion 101a is provided with a claw engaging portion 102, and the left and right side surfaces and the lower surface of the outer peripheral portion 101a are provided with protruding portions 105, respectively. The protrusions 105 are provided in parallel along the front-rear direction near the center of the upper and lower sides of the left and right side surfaces and the vicinity of the center of the left and right sides of the lower surface. Further, the front side of the main body 101 is open, and a predetermined number of terminals extending toward the front side are shown inside the main body 101 (although not shown in FIG. 3, eight examples are shown. ) Are provided side by side. Each terminal is connected to a plurality of wires 300 connected to the male connector 100, respectively.

The female connector 200 includes a main body 201 on the front side. The main body 201 has a recess 201a formed from the front side to the rear side. The recess 201a has a shape in which the main body 101 of the male connector 100 can be fitted. That is, it has a horizontally long rectangular shape as a whole when viewed from the front, and the corners are rounded. Further, a claw 202 is provided on the upper portion of the recess 201a. Grooves 205 are provided on the left and right side surfaces and the lower surface of the recess 201a, respectively. The groove 205 is provided in parallel in the front-rear direction near the center of the upper and lower sides of the left and right side surfaces and the vicinity of the center of the left and right sides of the lower surface. Further, in the recess 201a, a terminal connection portion 210 is provided from the back side to the front side, and a predetermined number of terminals are provided side by side here. FIG. 3 shows an example in which a total of eight terminals are provided, four on the top and four on the left and right. Each terminal is connected to a plurality of wirings 400 connected to the female connector 200, respectively.

When the male connector 100 and the female connector 200 are brought close to each other from the position shown in FIG. 3, the main body 101 of the male connector 100 is inserted into the recess 201a of the main body 201 of the female connector 200 and fitted. At this time, the three protruding portions 105 of the male connector 100 are inserted into the three groove portions 205 of the female connector 200 to be positioned. That is, it is possible to prevent the insertion from being inserted up and down or left and right by mistake. Further, the claw 202 of the female connector 200 engages with the claw engaging portion 102 of the male connector 100. This makes it possible to prevent the male connector 100 and the female connector 200 from coming off. At the time of this connection, the terminals of the male connector 100 and the female connector 200 are connected to each other.

For example, the male connector 100 of FIG. 3 is applied to the first connector 16 and the second connector 27 of FIGS. 1 and 2, and the female connector 200 of FIG. 3 is the second connector 17 and the first connector of FIGS. 1 and 2. Applicable to connector 26.

(Example of agricultural work machine)
FIG. 4 is a rear view showing an example of an agricultural work machine applicable to the connector connection system for agricultural work machines of the present invention. FIG. 4 shows a substitute scraping work machine 50 provided with a folding mechanism as a specific example of the agricultural work machine 2. The horizontal direction in FIG. 4 is the horizontal direction, and the vertical direction in FIG. 4 is the vertical direction of the puddling work machine 50.

The side working portions 55'installed on both sides of the central working portion 55 are foldable with respect to the central working portion 55. The central working portion 55 is provided with a mast 51a, which is a mounting portion 51, and left and right hitches 51b, through which the substitute scratching work machine 50 is mounted behind the tractor 1. The power from the tractor 1 is input via an input shaft provided on the front side, and a cultivated portion having a puddling claw rotates inside the cover 52 and the first leveling body 53 behind the cover 52 to make the soil finer. Then, the surface of the soil is flattened by the first leveling body 53 and the second leveling body 54 provided behind the first leveling body 53. In this way, the puddling work is performed.

The control box 58 is provided on the side surface of the mast 51a, which corresponds to the control device 10 in FIGS. 1 and 2. For example, a sensor or the like capable of detecting the inclination can be installed in the control box 58. This sensor corresponds to the sensor 31 in FIGS. 1 and 2. The control box 58 may be installed on the cover 52 or other place on the frame where there is little vibration.

The left and right electro-hydraulic cylinders 56 can act on the rotating mechanism 57 to fold the side working portions 55'on both sides inward with respect to the central working portion 55 by expanding and contracting the cylinders. The overall width of the can be shortened. The left and right extension leveling body drive devices 60 can rotate the left and right extension leveling bodies 61 about the rotation shaft 61a via the arm 62 and the wire 63 by rotating the internal motor. This makes it possible to select whether to extend the extended leveling body 61 provided at both end portions of the second leveling body 54 outward or to fold it inward. The second leveling body driving device 66 rotates the second leveling body 54 via the second leveling body link means 67 by rotating the internal motor, and puts it in a soil-pulling state fixed on the lower side. It is possible to select whether to use the normal scratching state in which the rotation is not fixed. The second leveling body driving device 66 can be provided in the control box 58 or adjacent to the control box 58.

The electro-hydraulic cylinder 56, the extended leveling body drive device 60 (motor), and the second leveling body drive device 66 (motor) can be applied as the actuator 32.

<Example 1>
FIG. 5 is a diagram showing a wiring state at the time of connection in the first embodiment of the present invention. FIG. 6 is a diagram showing a wiring state at the time of non-connection in the first embodiment of the present invention. In the first embodiment, specific examples of the embodiments of FIGS. 1 and 2 will be described.

(Structure of Example 1)
The control device 10 includes a control unit 11, 11 input circuits 12a to 12k, a ground 125, an output circuit 126, 11 diodes 13a to 13k, a resistor 135, and 16 connection units 14a to 14p.

The input device 20 includes 11 switches 21a to 21k and a light emitting diode 215. The switches 21a to 21k are switches capable of switching between ON (ON) for connecting the wiring and OFF (OFF) for disconnecting the wiring. The light emitting diode (LED) 215 is a lamp that emits light when a current flows through it.

The eight wires 15a to 15h correspond to the second harness portion 15B of FIG. 1 composed of a plurality of wires, one end of which is connected to the first connector 16 and the other end of which are the connection portions 14a to 14h of the control device 10. Are connected to each. In the control device 10, the connection portions 14b to 14g are connected to the input circuits 12a to 12f via the diodes 13a to 13f, respectively. The connection unit 14a is an empty connection unit that is not connected to any part of the control device 10. The connection portion 14h is connected to the ground 125.

The eight wires 15i to 15p correspond to the third harness portion 15C of FIG. 1 composed of a plurality of wires, one end of which is connected to the second connector 17, and the other end of which is the connection portion 14i to 14p of the control device 10. Are connected to each. In the control device 10, the connection portions 14j to 14n are connected to the input circuits 12g to 12k via diodes 13g to 13k, respectively. The connection portions 14i and 14o are empty connection portions that are not connected to anywhere in the control device 10. The connection portion 14p is connected to the output circuit 126 via the resistor 135.

The eight wires 22a to 22h correspond to the second harness portion 22B of FIG. 1 composed of a plurality of wires, one end of which is connected to the first connector 26 and the other end of which is connected to the input device 20. Of these, the six wires 22b to 22g are connected to one ends of the six switches 21a to 21f, respectively.

The eight wires 22i to 22p correspond to the third harness portion 22C of FIG. 1 composed of a plurality of wires, one end of which is connected to the second connector 27 and the other end of which is connected to the input device 20. The other ends of the five wires 22j to 22n are connected to one ends of the five switches 21g to 21k, respectively. Further, the other end of the wiring 22p is connected to the light emitting diode 215.

The other ends of the wirings 22a, 22h, 22i, 22o are connected to each other in the input device 20. The other end of the switches 21a to 21k is connected to these wires.

The input circuits 12a to 12k are circuits for detecting ON / OFF of the switches 21a to 21k. The input circuits 12a to 12k output a predetermined voltage. While detecting this predetermined voltage, it is detected that the corresponding switches 21a to 21k are OFF. When it is detected that this voltage is in the vicinity of 0V, it is detected that the corresponding switches 21a to 21k are ON. That is, the input circuits 12a to 12k can determine whether the corresponding switches 21a to 21k are ON or OFF by detecting such a change in voltage. As the input circuits 12a to 12k, a digital input circuit that detects the vicinity of a predetermined voltage to be output and the vicinity of 0V can be adopted.

The input circuits 12a to 12k have a configuration for exerting the functions of the input circuit, such as a transistor, a relay, and a CPU that performs necessary processing. If it is a relay, it can be configured with a coil that is turned off when a predetermined voltage is generated and turned on when the voltage is lost.

The diodes 13a to 13k are set so that a current can flow from the input circuits 12a to 12k to the connection portions 14b to 14g and 14j to 14n. Further, it is set so that no current flows from the connection portions 14b to 14g and 14j to 14n to the input circuits 12a to 12k. This forms a protection circuit.

When the switches 21a to 21k are OFF, the line is disconnected and the switches 21a to 21k are not electrically connected. On the other hand, when it is ON, the line is connected and electrically connected. As the switches 21a to 21k, either a contact switch or a non-contact switch can be applied. In the case of a contact switch, it is a switch that physically connects contacts, and in the non-contact switch, a switch using a transistor or the like can be applied.

(At the time of connection of Example 1)
In FIG. 5, the first connector 16 and the first connector 26 are connected, and the second connector 17 and the second connector 27 are connected. As a result, each of the wirings 15a to 15p is connected to each of the wirings 22a to 22p, and the wirings of the control device 10 and the input device 20 are connected.

In the state of FIG. 5, for example, when the switch 21a is OFF and the line of the wiring 22b is interrupted, the voltage output by the input circuit 12a remains. The input circuit 12a can detect this voltage and detect that the switch 21a is OFF. On the other hand, when the switch 21a is turned on and the line of the wiring 22b is connected, the input circuit 12a is connected to the ground 125 via the wirings 15b, 22b, 22h, and 15h. As a result, the current flows to the ground 125 and the voltage of the input circuit 12a becomes 0V. The input circuit 12a can detect this 0V and detect that the switch 21a is turned on. These information regarding the switch 21a are sent to the control unit 11 and can be used for control. The diode 13a allows the current to flow from the input circuit 12a to the ground 125 side at this time.

Similarly, the other switches 21b to 21k can detect ON and OFF of the switches by the input circuits 12b to 12k. Then, the control unit 11 can control the actuator 32 (see FIGS. 1 and 2) and the like according to the states of the switches 21b to 21k.

The light emitting diode 215 can emit light by outputting electricity from the output circuit 126 under the control of the control unit 11.

Since the connection portions 14a and 14o are not used, it is possible to increase the number of switches by adding input circuits as needed.

(When not connected in Example 1)
In FIG. 6, the first connector 16 and the second connector 17 are connected, and the first connector 26 and the second connector 27 are connected. As a result, the wirings 15a and 15p, the wirings 15b and 15o, the wirings 15c and 15n, the wirings 15d and 15m, the wirings 15e and 15l, the wirings 15f and 15k, the wirings 15g and 15j, and the wirings 15h and 15i are connected. Further, wirings 22a and 22p, wirings 22b and 22o, wirings 22c and 22n, wirings 22d and 22m, wirings 22e and 22l, wirings 22f and 22k, wirings 22g and 22j, and wirings 22h and 22i are connected.

By this connection, in the control device 10, an empty connection portion 14a and an output circuit 126, an input circuit 12a and an empty connection portion 14o, an input circuit 12b and an input circuit 12k, an input circuit 12c and an input circuit 12j, and an input circuit 12d and an input The circuit 12i, the input circuit 12e and the input circuit 12h, the input circuit 12f and the input circuit 12g, the empty connection portion 14i and the ground 125 are electrically connected.

Here, for example, the input circuit 12b and the input circuit 12k are in a connected state, but if the voltage output from the input circuit 12b and the voltage output from the input circuit 12k are different, the current is the larger voltage. Flows from to the smaller one. For example, if the voltage of the input circuit 12b is 12V and the voltage of the input circuit 12k is 5V, the current will try to flow towards the input circuit 12k (via the wiring 15c, 15n). However, since the diode 13k is provided on the wiring 15n side of the input circuit 12k, no current can flow to the input circuit 12k side. As a result, it is possible to prevent the input circuit 12k from being damaged due to an overcurrent flowing through it.

In addition, for example, when the output voltage of the input circuit 12c and the input circuit 12j are the same, the actual voltage value may deviate or fluctuate from the rated value. Therefore, either voltage may be smaller, and the current tends to flow to the smaller voltage. Even in this case, since the diodes 13c and 13j are provided on the wiring 15d and 15m sides of the input circuits 12c and 12j, no current can flow into any of the input circuits 12c and 12j.

These things are the same for other connected input circuits, and the diode prevents the current from flowing into the input circuit. Further, since the input circuit 12a is connected to the empty connection portion 14o and the output circuit 126 is connected to the empty connection portion 14a, there is no problem that these circuits are damaged due to the voltage difference.

In the input device 20, the switches 21b and 21k, the switches 21c and 21j, the switches 21d and 21i, the switches 21e and 21h, and the switches 21f and 21g are connected by the above connection. However, since they do not output electricity, there is no problem due to the voltage difference.

(Effect of Example 1)
As described above, in the first embodiment, the harness 15 and the harness 22 can be connected and the switches 21a to 21k of the input device 20 can be remotely controlled to operate the actuator 32 in response to each switch operation. Then, by making the harness 22 removable with respect to the harness 15, it is possible to separate the wiring connecting the tractor 1 and the agricultural work machine 2. At this time, with respect to the harness 15, when the harness 22 is removed, the first connector 16 and the second connector 17 can be connected to each other. Further, also in the harness 22, when the harness 15 is removed, the first connector 26 and the second connector 27 can be connected to each other. As a result, it is possible to prevent the terminals from being left exposed, and it is possible to prevent deterioration and corrosion of the terminals, intrusion of mud, and the like.

At this time, the wirings of the harness 15 are connected to each other, but the diodes 13a to 13k provided on the wiring side of the input circuits 12a to 12k allow current to flow from the wiring side to the input circuits 12a to 12k even if a voltage difference occurs. It can be prevented from flowing in. As a result, the diodes 13a to 13k function as protective means and can protect the input circuits 12a to 12k. As a result, it is not necessary to increase the number of terminals connected to the empty connection portion in the connector, the number of terminals of the first connector 16 and the second connector 17 can be reduced, and a simple and compact connector structure can be obtained.

<Example 2>
FIG. 7 is a diagram showing a wiring state at the time of connection in the second embodiment of the present invention. In the second embodiment, the points different from those in the first embodiment are mainly described, the same parts are designated by the same reference numerals, and the same description is omitted unless otherwise specified.

(Structure of Example 2)
The control device 10'is provided with an input circuit 12x instead of the input circuit 12j and a power supply circuit 12y instead of the input circuit 12k for the control device 10 (of the first embodiment). Further, an input circuit 12z is additionally provided. Further, instead of the connecting portions 14m to 14o, the connecting portions 14m'to 14o'are used.

The input device 20'does not have switches 21j and 21k with respect to the input device 20 (of the first embodiment). Further, apart from the input device 20', a variable resistor 250 and a sensor 260 are provided.

Wiring 15m'to 15o' is provided in place of wiring 15m to 15o (of the first embodiment). One end of the wiring 15m'to 15o'is connected to the second connector 17, and the other end is connected to the connection portion 14m'to 14o' of the control device 10'. In the control device 10', the connection portion 14m' is connected to the input circuit 12x via the overvoltage protection circuit 13x. Further, the connection portion 14n'is connected to the power supply circuit 12y via the diode 13y. Further, the connection portion 14o'is connected to the input circuit 12z via the diode 13z.

Wiring 22m'to 22o' is provided in place of wiring 22m to 22o (of the first embodiment). One end of the wiring 22m'to 22o' is connected to the second connector 27. The other end of the wiring 22m'is connected to the variable portion 250b of the variable resistor 250. The other end of the wiring 22n'is connected to one end side of the resistance 250a of the variable resistor 250. In addition, it branches on the way and is also connected to the sensor 260. The other end of 22o'is connected to one end side of the sensor 260.

The other ends of the wirings 22a, 22h, 22i are connected to each other in the input device 20'. The other end side of the switches 21a to 21i, the other end side of the resistance 250a of the variable resistor 250, and the other end side of the sensor 260 are connected to these wirings.

The variable resistor 250 includes a resistor 250a and a variable portion 250b. The variable portion 250b is a portion that can be moved by changing the position of the contact point with respect to the resistance 250a. Since the resistance changes by changing the position of the variable portion 250b, the voltage to be detected is changed, and the position of the element connected to the variable resistor 250 can be detected. The variable resistor 250 can be applied to, for example, a rotatable operation knob, a potentiometer, and the like. The variable resistor 250 can be installed on the farm work machine 2 side separately from the input device 20', but it can also be installed on the input device 20'.

As the sensor 260, a sensor that detects ON and OFF can be applied. For example, a proximity switch or the like can be applied. When ON is detected, the wiring is connected, and when OFF is detected, the wiring is disconnected. For example, it can be configured with a transistor inside. The sensor 260 corresponds to the sensor 31 in FIGS. 1 and 2.

The input circuit 12x is a circuit for inputting the voltage of the variable portion 250b of the variable resistor 250. The input circuit 12x is an input circuit capable of continuously detecting a voltage in a predetermined range. The input circuit 12x can be configured, for example, as an analog input circuit so that the input voltage can be digitally converted and the information can be output. This makes it possible to detect a voltage in a predetermined range from the variable resistor 250.

The power supply circuit 12y becomes a power source having a predetermined voltage and supplies electric power to the variable resistor 250 and the sensor 260.

The input circuit 12z inputs information from the sensor 260, and the method of detecting ON / OFF of the sensor 260 is the same as the case of detecting ON / OFF of the switches 21a to 21i. Therefore, the input circuit 12z can be an input circuit having the same configuration as the input circuits 12a to 12i.

The overvoltage protection circuit 13x is a circuit for preventing a voltage higher than a predetermined value from being applied to the input circuit 12x. For example, it can be configured by a circuit including a Zener diode or the like. This prevents the input circuit 12x from failing due to a short circuit or the like. The voltage of the overvoltage protection circuit 13x or more is set to a voltage or less that the input circuit 12x can withstand in design. Further, the overvoltage protection circuit 13x may be provided with an internal resistance so that the resistance in the variable portion 250b of the variable resistor 250 does not become 0 and short-circuited.

The diode 13y is set so that a current can flow from the power supply circuit 12y to the connection portion 14n', and the current does not flow from the connection portion 14n'to the power supply circuit 12y. The diode 13z is set so that a current can flow from the input circuit 12z to the connection portion 14o', and the current does not flow from the connection portion 14o'to the input circuit 12z. This forms a protection circuit.

(At the time of connection of Example 2)
The state at the time of connection of the second embodiment is the state of FIG. 7 in which the first connector 16 and the first connector 26 are connected, and the second connector 17 and the second connector 27 are connected.

In the state of FIG. 7, the voltage by the variable portion 250b of the variable resistor 250 is input to the input circuit 12x. The information by the input voltage is converted into a digital signal by the input circuit 12x and sent to the control unit 11, and can be used for the control of the control unit 11.

Further, in the state of FIG. 7, when the sensor 260 detects OFF and the line of the wiring 22o'is interrupted, the voltage output by the input circuit 12z remains. On the other hand, when ON is detected, the line of the wiring 22o'is connected, and the input circuit 12z is connected to the ground 125 via the wirings 15o', 22o', 22h, and 15h. As a result, the current flows to the ground 125 and the input circuit 12z becomes 0V. As a result, a voltage difference is generated from the case where OFF is detected, so that the input circuit 12z can detect that the sensor 260 has detected ON. This information is sent to the control unit 11 and can be used for control. The diode 13z allows the current flow from the input circuit 12z to the ground 125 at this time.

(When not connected in Example 2)
In the non-connected state of the second embodiment, from FIG. 7, the first connector 16 and the first connector 26 are separated, the second connector 17 and the second connector 27 are separated, and the first connector 16 and the second connector are separated. The connector 17 is connected, and the first connector 26 and the second connector 27 are connected.

In the non-connected state, the wirings 15b and 15o', the wirings 15c and 15n', the wirings 15d and 15m', the wirings 22b and 22o', the wirings 22c and 22n', and the wirings 22d and 22m' are connected. The other wiring connections are the same as in the first embodiment.

By this connection, in the control device 10', the input circuit 12a and the input circuit 12z, the input circuit 12b and the power supply circuit 12y, and the input circuit 12c and the input circuit 12x are electrically connected. Other electrical connections are the same as in Example 1.

Here, the input circuit 12a and the input circuit 12z are connected to each other, but current cannot flow into the input circuit 12a by the diode 13a and into the input circuit 12z by the diode 13z.

Further, although the input circuit 12b and the power supply circuit 12y are connected to each other, current cannot flow into the input circuit 12b by the diode 13b and into the power supply circuit 12y by the diode 13y.

Further, although the input circuit 12c and the input circuit 12x are connected to each other, current cannot flow into the input circuit 12c due to the diode 13c. Further, although it is possible for current to flow into the input circuit 12x from the input circuit 12c, the overvoltage protection circuit 13x can protect the input circuit 12x so that a voltage higher than a predetermined value is not applied to the input circuit 12x. be. Further, by applying an analog circuit that can detect a voltage within a predetermined range, the input circuit 12x does not fail even if the voltage changes as long as the voltage is within the predetermined range.

In the input device 20', the switch 21a and the sensor 260, the switch 21b and the resistor 250a, and the switch 21c and the variable portion 250b are connected by the above connection. However, since they do not output electricity, there is no problem due to the voltage difference. Other than this, it is the same as that of the first embodiment.

(Effect of Example 2)
As described above, in the second embodiment, in addition to the effect of the first embodiment, the effect that can be applied to the configuration using the variable resistor 250 and the sensor 260 is provided. In the case of the variable resistor 250, the input circuit 12x can detect a voltage within a predetermined range. Therefore, by using the overvoltage protection circuit 13x, the input circuit is used even when the first connector 16 and the second connector 17 are connected. 12x failure can be prevented.

As described above, the embodiments of the present invention have been described, but the present invention is not limited to the above-described embodiments, and various modifications other than those described above are also included. For example, the present invention is not limited to the one provided with all the configurations provided in the above-described embodiment. It is also possible to delete a part of the configuration of a certain embodiment or replace it with another configuration.

For example, in FIG. 3, a configuration may be used in which the male connector 100 and the female connector 200 are connected by a seal to enhance waterproofness and dustproofness.

Further, although a substitute scraping work machine is shown as an example of the agricultural work machine 2, it can be widely applied to a work machine to be attached to a tractor such as a rotary work machine, a ridge coating machine, and a fertilizer sowing machine.

Further, the number of terminals to be connected to the connector is shown to have a configuration having eight terminals, but the number can be determined as needed, for example, two, four, six, eight or more. .. In this case, the present invention can be applied if the connectors having the same number of terminal connection portions are connected to each other.

Further, with respect to FIGS. 5 and 6, the diodes 13a to 13k are provided for all the input circuits 12a to 12k, respectively, so that damage to the input circuits can be reliably prevented. However, when the first connector 16 and the second connector 17 are connected, if the voltage difference between the connected input circuits is known in advance, it can be provided only on the input circuit side having the lower voltage. ..

Further, in FIGS. 5 to 7, the ground 125 is shown to be connected to the wiring 15h on the first connector 16 side, but it can also be applied as a configuration to be connected to the wiring on the second connector 17 side.

Further, in FIGS. 5 to 7, instead of the light emitting diode 215, another lamp, a liquid crystal display, a 7-segment display, or the like may be used as an information display unit.

Further, although the configuration for connecting the digital input circuit 12c and the analog input circuit 12x has been described in FIG. 7, the analog input circuit 12x may be configured to be connected to an empty connection portion.

Further, in FIG. 7, the input circuit 12x is provided with the overvoltage protection circuit 13x, but a diode may be provided instead. The same configuration as that of the diode 13a or the like can be applied to this.

1 tractor 2 agricultural work machine 5 battery 6 power harness 10, 10'control device 11 control unit 15, 22 harness 16 first connector 17 second connector 20, 20'input device 26 first connector 27 second connector 31 sensor 32 Actuators 12a-12k, 12x, 12z Input circuits 13a-13k, 13y, 13z Diodes 14a-14p Connections 15a-15p, 22a-22p, 15m'-15o', 22m'-22o' Wiring 21a-21k Switch 100 male connector 125 Earth 126 Output circuit 135 Resistance 12y Power supply circuit 13x Overvoltage protection circuit 200 Female connector 210 Terminal connection part 215 Light emitting diode 250 Variable resistor 250a Resistance 250b Variable part 260 Sensor

Claims (8)

In the connector connection system for agricultural work machines used for agricultural work machines that are attached to tractors for agricultural work.
A control device provided in the agricultural work machine, a first connector connected to the control device via wiring, and a second connector connected to the control device via wiring are provided.
The first connector and the second connector are removable and can be attached and detached.
The control device includes a connection portion to which the wiring is connected, an input circuit connected to the connection portion, and a protective means provided between the connection portion and the input circuit.
The protective means is a connector connection system for agricultural work machines, which is set so that a current can flow only in the direction of the connection portion from the input circuit. In the connector connection system for agricultural work machines according to claim 1,
The protective means is a connector connection system for agricultural work machines, which is configured by using a diode. In the connector connection system for agricultural work machines according to claim 1 or 2.
It comprises an input device, a first connector connected to the input device via wiring, and a second connector connected to the input device via wiring.
A connector connection system for agricultural work machines, wherein the first connector and the first connector are detachable, and the second connector and the second connector are detachable. In the connector connection system for agricultural work machines according to claim 3.
The input device has a switch and
The input circuit detects ON and OFF of the switch to be connected in a state where the first connector and the first connector are connected and the second connector and the second connector are connected. Connector connection system for agricultural work machines. In the connector connection system for agricultural work machines according to claim 3 or 4.
A connector connection system for agricultural work machines, wherein the first connector and the second connector are detachable. In the connector connection system for agricultural work machines according to any one of claims 3 to 5.
The sensor is provided, and the sensor is connected to the second connector via wiring.
The control device is characterized by having an input circuit capable of detecting ON and OFF of the sensor, and a protective means set so that a current can flow only in the direction of the sensor from the input circuit. Connector connection system for agricultural work machines. In the connector connection system for agricultural work machines according to any one of claims 3 to 6.
A variable resistor is provided, and the variable resistor is connected to the second connector via wiring.
The control device is a connector connection system for agricultural work machines, characterized by having an input circuit capable of detecting the voltage of the variable resistor and an overvoltage protection circuit for preventing a voltage higher than a predetermined value from being applied to the input circuit. In the connector connection system for agricultural work machines according to any one of claims 1 to 7.
The agricultural work machine is equipped with an actuator.
The control device includes a control unit.
The control unit is a connector connection system for agricultural work machines, which controls the actuator based on information from the input circuit.

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