JP2542368Y2 - Automatic connection / detachment device for connection terminals in tractors - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic connecting / disconnecting device for connecting terminals of a tractor which is configured to removably connect a connecting terminal on a traveling body and a connecting terminal on a working unit.

[0002]

2. Description of the Related Art
Among such tractors, for example, those that provide electric components such as a tillage depth detection sensor in a working unit, such as those that perform automatic tillage depth control, in this case, the electric components on the working unit side may be run. It is necessary to connect to electrical components such as a control unit on the machine body via a harness, and to attach / detach a work unit, it is necessary to interpose a detachable connection terminal such as a coupler in the harness. However, in this case, when attaching and detaching the working unit, it is necessary to connect and disconnect the connection terminals one by one. If he forgets, he may tear off the harness, which is a problem.

[0003]

SUMMARY OF THE INVENTION The present invention has been conceived in view of the above-mentioned circumstances, and has as its object to provide an automatic attachment / detachment device of a connection terminal in a tractor capable of eliminating these disadvantages. In a tractor having a traveling body-side connection terminal connected to the traveling body-side electrical components and a working unit-side connection terminal connected to the working unit-side electrical components, the tractor is configured to be detachably connected to the traveling body side. An automatic actuator for connection terminal automatic attachment / removal for moving the connection terminal on the traveling body side to a connection position for connecting to the work unit side connection terminal and a separation position for separating from the work unit side connection terminal is provided. Is what you do. According to the present invention, with this configuration, the work of attaching and detaching the connection terminal is not required, and the workability at the time of attaching and detaching the working section is remarkably improved, and the disconnection of the harness due to forgetting to remove the connection terminal can be surely prevented. Things.

[0004]

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a traveling body of a tractor, and a rotary tilling type working unit 4 is provided at a rear portion of the traveling body 1 via a lifting link mechanism 2 and an automatic hitch mechanism 3.
The working unit 4 is moved up and down by the vertical swing of a lift arm 5 accompanying expansion and contraction of a hydraulic cylinder (not shown), and all of these basic configurations are the same as those of the related art.

Reference numeral 6 denotes a hitch frame which constitutes the automatic hitch mechanism 3. At the upper end of the center of the hitch frame 6, a top hook 7 pivotally connected to the tip of the top link 2a of the lifting link mechanism 2 is fixed. At the left and right ends of the hitch frame 6, lower hooks 8 that are respectively connected to the tips of the left and right lower links 2b of the lifting link mechanism 2 are fixed, and the top hook 7 is locked to the top mast 9 on the working unit 4 side. By raising the working unit 4 in this state, the connecting pin 10 on the working unit 4 side automatically engages with the lower hook 7 so that the working unit 4 is automatically mounted.

A swing hook 11 is provided on the lower hook 8 so as to be swingable.
Is always urged toward the locking posture side by an elastic machine (not shown) to automatically lock the connecting pin 10 engaged with the lower hook 8, while the swing hook 11 is interlocked. A state in which the connecting pin 10 is locked to the locking position based on the operation of the connecting /
It is configured to transform into a state of releasing the lock of the.

Reference numeral 14 denotes a PTO connecting portion provided at the lower center portion of the hitch frame 6. The input side of the PTO connecting portion 14 is previously connected via a universal joint 15 to a PTO shaft on the traveling body 1 side. 16 while P
The output side of the TO connecting section 14 is constituted by a clutch mechanism which automatically connects to the input section of the working section 4 along with the above-mentioned automatic mounting and automatically separates when the working section 4 is disconnected. .

Further, reference numeral 17 denotes a coupler attaching / detaching cylinder provided at an upper central portion of the hitch frame 6. The coupler attaching / detaching cylinder 17 is double-acting so as to extend and contract rearward based on switching of an electromagnetic valve 18. The traveling machine side coupler 20 connected to the control unit 19 of the traveling machine body 1 is provided at the tip of the rod 17a of the coupler attaching / detaching cylinder 17. On the other hand, reference numeral 21 denotes a working unit-side coupler provided on the working unit 4 side, and the working unit-side coupler 21 is connected to electrical components such as a tillage depth detection sensor (not shown) provided on the working unit 4 side. However, the connecting surface is opposed to the connecting surface of the traveling machine-side coupler 20 when the working unit is mounted. That is, while the traveling machine body-side coupler 20 is automatically connected to the working unit-side coupler 21 based on the extension operation of the coupler attaching / detaching cylinder 17, the coupler attaching / detaching cylinder 1
The traveling body-side coupler 20 is configured to be separated from the working unit-side coupler 21 based on the reduction operation of the operation unit 7. Also,
Reference numeral 22 denotes a connection guide provided on the traveling body-side coupler 20. The connection guide 22 has a so-called flapper-shaped inclined guide surface, and the traveling body-side coupler is guided by the guiding action of the inclined guide surface. 20 can be securely connected to the working unit-side coupler 21 without displacement.

The control unit 19 is constructed by using a so-called microcomputer. In addition to the automatic control parts such as the cultivation depth detecting sensor, the control unit 19 is provided with the locking / unlocking operation lever 13 for locking. While inputting signals from the first and second detection switches 23 and 24 for detecting the position or the attachment / detachment position, an operation signal is output to the electromagnetic valve 18 based on the judgment based on these input signals. I'm sorry. That is, the control unit 19 causes the coupler attaching / detaching cylinder 17 to extend based on the position of the attaching / detaching operation lever 13 at the locking position, and causes the coupler attaching / detaching cylinder 17 to operate based on the position of the attaching / detaching operation lever 13 at the detaching position. Activate reduction,
As a result, the attachment / detachment of the coupler accompanying the attachment / detachment of the working unit 4 is automatically performed. Since the coupler wiring includes a loop wiring for inputting a connection confirmation signal to the control unit 19 due to conduction based on the connection between the two couplers 20 and 21, the control unit 19 uses the coupler 2.
The connection and separation of 0 and 21 can be confirmed.

In the embodiment of the present invention constructed as described above, when the working unit 4 is automatically mounted in the above-described procedure, the coupler mounting / dismounting cylinder 17 is extended based on the fact that the mounting / dismounting operation lever 13 has reached the locking position. The traveling body-side coupler 20 is automatically connected to the working unit-side coupler 21 in accordance with the extension operation. On the other hand, when the detachable operation lever 13 is operated to remove the working unit 4 to the detached position, the coupler is operated. The detachable cylinder 17 is contracted and the traveling body-side coupler 20 is automatically separated from the working unit-side coupler 21. Therefore, when attaching and detaching the working unit 4, the couplers 20, 2
It is possible to significantly improve the workability by eliminating the troublesome work of connecting and disconnecting each one, or forgetting to disconnect the couplers 20 and 21 when removing the working unit 4 and tearing off the harness. Such defects can be reliably prevented.

In the embodiment, since the couplers 20 and 21 are automatically attached and detached based on the operation of the attachment / detachment operation lever 13 provided for locking and releasing the locking of the working unit 4, the operation is particularly specially operated. By providing the tool, it is possible to avoid an increase in the number of parts, a complicated structure, a decrease in operability, and the like. In addition, the couplers 20 and 21 are reliably connected after the working unit is mounted based on the operation of the attachment / detachment operation lever 13, and are surely separated before the working unit is removed. This is extremely convenient.

Furthermore, in the embodiment, since the connecting guide 22 is provided on the traveling body-side coupler 20 (which may be provided on the working section-side coupler 21), the traveling body-side coupler 20 can be moved without displacement. 21 can be reliably connected.

It should be noted that the present invention is not limited to the above embodiment, and the actuator for automatically attaching and detaching the connection terminals is not limited to the hydraulic type, but may be of the pneumatic type, the electric type, or the like. It is needless to say that may be used. Also, the connection terminals are not limited to those provided on the sensor wiring, but may be provided on power supply wiring (such as wiring for supplying power to the electric cylinder for moving the rear cover). .

[0014]

In summary, since the present invention is configured as described above, the traveling body-side connection terminal connected to the traveling machine-side electrical components, and the working unit connected to the working unit-side electrical components. The connection and separation of the two connection terminals are performed automatically based on the operation of the connection terminal automatic attachment / detachment actuator provided on the traveling body side while the side connection terminals are detachably connected to the side connection terminals. . Therefore,
When attaching / detaching the working unit, it is possible to significantly improve the workability when attaching / detaching the working unit by eliminating the trouble of connecting and disconnecting the connection terminals manually as in the conventional case. In this case, the inconvenience of forgetting to disconnect the connection terminal and tearing the harness can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a side view of a main part of a tractor.

FIG. 2 is a perspective view of a main part of an automatic hit mechanism.

FIG. 3 is a block diagram showing a schematic configuration of a coupler automatic attaching / detaching mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Traveling machine body 3 Auto hitch mechanism 4 Working part 17 Coupler attaching / detaching cylinder 20 Traveling machine side coupler 21 Working part side coupler

Claims (1)

(57) [Scope of request for utility model registration] 1. A tractor comprising a traveling body-side connection terminal connected to a traveling body-side electrical component and a working unit-side connection terminal connected to a working unit-side electrical component, the tractor being detachably connected. On the traveling body side, an actuator for connection terminal automatic attachment / detachment for moving the connection terminal on the traveling body side to a connecting position for coupling to the working section side connection terminal and a separating position for separating from the working section side connection terminal is provided. An automatic attachment / detachment device for a connection terminal in a tractor.