JPH0534801U - Automatic attachment / detachment device for connecting terminals in tractors - Google Patents

Abstract

(57) [Abstract] [Purpose] The work of attaching / detaching the connecting terminal is not required to improve the workability at the time of attaching / detaching the working part, and the disconnection of the harness due to forgetting to remove the connecting terminal is surely prevented. [Structure] The hitch frame 6 is provided with a traveling body-side coupler 20.
A coupler attachment / detachment cylinder 17 is provided for automatically moving the unit to / from the working unit side coupler 21 for attachment / detachment.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an automatic attachment / detachment device of a connection terminal in a tractor configured to detachably connect a traveling machine body side connection terminal and a working section side connection terminal.

[0002]

[Problems to be Solved by Prior Art and Invention]

 Generally, some tractors of this type have electrical components such as a working depth detection sensor in the working part, such as those that perform automatic working depth control.In this case, however, the electrical components on the working part side are described above. Is connected to electrical components such as the control unit on the traveling machine side via a harness, and it is necessary to interpose a connection terminal such as a detachable coupler in the harness considering that the working part is attached and detached. There is. However, with this product, it is necessary to connect and disconnect the connecting terminals one by one when attaching and detaching the working part, so it may be troublesome to attach and detach the working part. There was a fear that the harness would be torn off if it was forgotten to disconnect it, which was a problem.

[0003]

[Means for Solving the Problems]

 The present invention was devised in view of the above circumstances to provide an automatic attachment / detachment device for connecting terminals in a tractor that can eliminate these drawbacks. In a tractor which detachably connects a traveling machine body side connecting terminal to be connected and a working section side connecting terminal connected to an electric component on the working section side, the traveling machine body side connecting terminal to the traveling machine body side connecting terminal Is provided with an actuator for automatically connecting / disconnecting the connecting terminal, which moves back and forth between a connecting position for connecting to the working unit side connecting terminal and a separated position for separating from the working unit side connecting terminal. With this configuration, the present invention makes it possible to remarkably improve workability when attaching / detaching the work part by eliminating the work of attaching / detaching the connection terminal, and reliably preventing the disconnection of the harness due to forgetting to remove the connection terminal. It was done.

[0004]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a traveling machine body of a tractor, and a rotary tiller type working section 4 is connected to a rear portion of the traveling machine body 1 via an elevating link mechanism 2 and an auto hitch mechanism 3, and the working section 4 Can be moved up and down by vertically swinging the lift arm 5 associated with the expansion and contraction of a hydraulic cylinder (not shown).

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

Further, 11 is a swinging hook provided on the lower hook 8 so as to be swingable, and the swinging hook 11 is an ammunition to automatically lock the connecting pin 10 engaged with the lower hook 8 ( Although not shown in the figure), the swinging hook 11 is always biased toward the locking position, but the swinging hook 11 is locked to the locking position based on the operation of the attachment / detachment operation lever 13 that is interlocked and coupled. And a state in which the locking of the connecting pin 10 is released against the ammunition 12.

Reference numeral 14 is a PTO connecting portion provided on the lower center of the hitch frame 6, and an input side of the PTO connecting portion 14 is a PTO shaft on the side of the traveling vehicle body 1 through a universal joint 15 in advance. On the other hand, the output side of the PTO connecting portion 14 is automatically connected to the input portion of the working portion 4 side in accordance with the automatic mounting described above, and is automatically separated when the working portion 4 is disconnected. It has a clutch mechanism.

Furthermore, reference numeral 17 denotes a coupler attaching / detaching cylinder provided in the central upper portion of the hitch frame 6, and the coupler attaching / detaching cylinder 17 is adapted to extend and retract rearward based on switching of the electromagnetic valve 18. Although it is constituted by a double-acting hydraulic cylinder, a traveling machine side coupler 20 connected to a control unit 19 of the traveling machine body 1 side is provided at the tip of the rod 17a of the coupler attaching / detaching cylinder 17. On the other hand, 21 is a working unit side coupler provided on the working unit 4 side, and the working unit side coupler 21 is connected to an electrical component such as a working depth detection sensor (not shown) provided on the working unit 4 side. The connecting surface of the traveling machine body-side coupler 20 faces the connecting surface of the traveling machine body side coupler 20 when the working unit is mounted. That is, the traveling machine body side coupler 20 is automatically connected to the working unit side coupler 21 based on the expansion operation of the coupler attachment / detachment cylinder 17, while the traveling machine body side coupler 20 is based on the contraction operation of the coupler attachment / detachment cylinder 17. Is configured to be separated from the working unit side coupler 21. Reference numeral 22 denotes a connection guide provided in the traveling machine-side coupler 20, the connection guide 22 having an inclined guide surface that expands in a so-called trapezoidal shape, and the traveling machine body is guided by the inclined guide surface. The side coupler 20 can be securely connected to the working unit side coupler 21 without displacement.

By the way, the control unit 19 is configured by using a so-called micro-computer, and in addition to the automatic control parts such as the working depth detection sensor, the detachable operation lever 13 is provided. Signals are input from the first and second detection switches 23 and 24 that detect that they are located at the lock position or the detached position, and an operation signal is output to the electromagnetic valve 18 based on the determination based on these input signals. It is like this. That is, the control unit 19 causes the coupler attaching / detaching cylinder 17 to extend based on the attachment / detachment operation lever 13 being located at the lock position, while the coupler attaching / detaching cylinder is based on the attachment / detachment operation lever 13 being located at the attachment / detachment position. 17 is contracted, whereby the working unit 4 is automatically attached and detached when the working unit 4 is detached. 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 of both couplers 20 and 21, the connection and separation of the couplers 20 and 21 are confirmed in the control unit 19. I am able to do it.

In the embodiment of the present invention configured as described above, when the working unit 4 is automatically mounted according to the above-mentioned procedure, the coupler attaching / detaching cylinder 17 is extended based on the fact that the attaching / detaching operation lever 13 reaches the locking position. Then, along with the extension operation, the traveling machine body side coupler 20 is automatically connected to the working unit side coupler 21, while the detachable operation lever 13 is operated to the detachable position in order to remove the working unit 4. The coupler attaching / detaching cylinder 17 is contracted and the traveling machine body side coupler 20 is automatically separated from the working unit side coupler 21. Therefore, the workability can be significantly improved by eliminating the troublesome work of connecting and disconnecting the couplers 20 and 21 one at a time when the work unit 4 is attached or detached. In addition, it is possible to surely prevent a trouble such as forgetting to disconnect the couplers 20 and 21 and tearing off the harness.

Further, in the embodiment, since the couplers 20 and 21 are automatically attached / detached based on the operation of the attachment / detachment operation lever 13 provided to lock and release the lock of the working unit 4, the configuration is particularly preferable. By providing the dedicated operation tool, it is possible to avoid an increase in the number of parts, a complicated structure, and a decrease in operability. Moreover, since the couplers 20 and 21 are securely connected after the working unit is mounted based on the operation of the attachment / detachment operation lever 13, and are reliably separated before the working unit is removed, the inconvenience caused by forgetting the operation may occur. This is extremely convenient because it can be reliably prevented.

Furthermore, in the embodiment, since the traveling machine body side coupler 20 (which may be provided on the working unit side coupler 21) is provided with the connection guide 22, the traveling machine body side coupler 20 is not displaced and is located on the working unit side. The coupler 21 can be reliably connected.

It should be noted that the present invention is not limited to the above-mentioned embodiment, and for example, the actuator for automatically connecting / disconnecting the connecting terminal is not limited to the hydraulic type, but may be a pneumatic type, an electric type, or the like. It goes without saying that the ones used may be used. Further, the connection terminals are not limited to those provided on the sensor wiring, and needless to say, may be those provided on the power wiring (wiring for supplying power to the rear cover moving electric cylinder, etc.). Is.

[0014]

[Operation effect]

 In short, since the present invention is configured as described above, the traveling machine body side connection terminal connected to the traveling machine body side electric component and the working unit side connection terminal connected to the working unit side electric component The connection and disconnection of the two connection terminals are automatically performed based on the operation of the connection terminal automatic attachment / detachment actuator provided on the traveling machine body side. Therefore, when attaching / detaching the working part, the workability of attaching / detaching the working part can be remarkably improved by eliminating the trouble of manually connecting and disconnecting the connection terminals as in the past. It is possible to reliably prevent the inconvenience of forgetting to disconnect the connection terminal and tearing off the harness when removing the part.

[Brief description of 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 hitch mechanism.

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

[Explanation of symbols]

 1 Traveling machine 3 Auto hitch mechanism 4 Working part 17 Coupler mounting / removing cylinder 20 Traveling machine side coupler 21 Working part side coupler

Claims (1)

[Scope of utility model registration request] 1. A tractor in which a traveling machine body side connection terminal connected to a traveling machine body side electric component and a working unit side connection terminal connected to a working unit side electric component are detachably connected, On the traveling machine body, a connection terminal automatic attachment / detachment actuator for moving the connecting terminal of the traveling machine body side forward and backward to a coupling position for coupling the working unit side connection terminal and a separated position separated from the working unit side connection terminal is provided. An automatic attachment / detachment device for connecting terminals in a tractor, which is characterized in that