JP2571468Y2 - Harness cable joint structure for agricultural tractor - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure of a harness cable in an agricultural tractor.

[0002]

2. Description of the Related Art Conventionally, when a rotary tractor is detachably mounted on a body of an agricultural tractor via a hitch device, a detection sensor for automatically controlling the plowing depth of the rotary tractor is connected to the body via a harness cable. The harness cable has a connection coupler interposed in the middle of the harness cable.

[0003]

However, when the rotary work machine is separated from the body of the agricultural tractor, it is necessary to separate the connecting coupler manually, and this separation work is automatically performed. Because you ca n’t
If the operator forgets to separate the connecting coupler, the harness cable may be cut and damaged when the rotary working machine is released. Conversely, when the rotary working machine is connected to the body side of the tractor, there is a problem that the connection of the connection coupler is forgotten or the connection is incorrect.

[0004]

According to the present invention, a tractor body and a work machine can be freely connected via a hitch device having an automatic connection mechanism, and a control detection sensor is provided on the work machine side. In an agricultural tractor in which the detection sensor for control is connected to a controller provided on the machine body side via a harness cable, a lock mechanism for locking a connection pin provided on a work machine in a connection state is provided in an automatic connection mechanism, and the lock is provided. An operating lever for unlocking is linked to the mechanism via an operating rod, and the upper joint of the coupling type joint is attached to the operating rod, while the lower joint of the same joint is attached to the front of the work machine. , While connecting the aircraft side harness cable to the upper joint,
Connect the work equipment harness cable to the lower joint, and in conjunction with the unlocking operation of the lock mechanism by the operation lever, the upper joint of the joint is disconnected from the lower joint side via the operating rod, and An object of the present invention is to provide a joint structure of a harness cable in an agricultural tractor, wherein an upper joint is configured to be connected to a lower joint via an operating rod in conjunction with a locking operation.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings. Reference numeral 1 denotes an agricultural tractor body, and a top link mounting bracket 2 and a lower link mounting pin 3 are fixed to a rear portion thereof. And the lower link 5. Reference numeral 6 denotes a hitch device connected to the rear ends of the top link 4 and the lower link 5. The hitch device 6 has an automatic connection mechanism 7 so that the work machine B can be automatically mounted. Reference numeral 8 denotes a rear view gate-shaped hitch frame constituting the automatic connection mechanism 7, which has an upper portion connected to the top link 4 and a lower portion connected to the lower link 5 so as to be vertically movable.

A lift arm 9 and a lift link 10 connect the lift arm 9 and the lower link 5.
Reference numeral 11 denotes a universal joint for freely connecting the PTO shaft 12 on the body 1 side and the dock clutch 14 on the clutch case 13 side.

Further, on the upper part of the hitch frame 8,
A U-shaped bearing portion 17 that supports an L-shaped upper arm 16 of a rotary working machine 15 that is a working machine B is fixed, and
On both lower sides of the hitch frame 8, a rotary work machine 15
Hooks 19, 19 are fixedly connected to the connecting pins 18, 18 provided on both sides of the lower part of the housing. Reference numeral 16-1 denotes a fulcrum pin provided on the upper part of the upper arm 16, and reference numeral 20 denotes a rearward opening provided on the hooks 19,19.

Reference numeral 21 denotes a lock mechanism for fitting the connecting pins 18 and 18 in a fixed state and an open state, which constitutes the automatic connection mechanism 7, and has an operation lever 22 for hand operation at the top and bottom. It is provided freely. 21A is a return spring.

Reference numeral 23 denotes an operating rod for connecting the operation lever 22 to the arm 24 of the lock mechanism 21. Reference numeral 25 denotes a rotation shaft of the lock mechanism 21.

The rotary working machine 15 is provided with a control detection sensor 26 for detecting the tillage depth, and the detection result of the control detection sensor 26 is transmitted to the machine body 1 by a harness cable 27 for signal transmission. Is transmitted to the controller 28 provided in the controller. 27-1 is the aircraft side harness cable, 27
Reference numeral -2 denotes a work machine side harness cable provided on the rotary work machine side.

Then, both harness cables 27-1, 27-2
Are connected intermittently via a coupling type joint 31 having upper and lower mating surfaces 29, 30.

The joint 31 is disposed inside the hitch frame 8 of the hitch device 6, and an upper joint 31-1 of the joint 31 is fixed to the operating rod 23 and a lower side of the joint 31. The joint 31-2 is fixed to the upper arm 16 on the rotary work machine 15 side.

An upper joint case 32 supports the upper joint 31-1, an attachment pipe 33, and a fixing pin 34.

34-1 is a lower joint case, 35 is a connection pin provided at the center, and 36 is an electrode of the upper joint 31-1 in a convex shape. Reference numeral 37 denotes an electrode of the lower joint 31-2, which is concave.

The embodiment of the present invention is configured as described above, and a rotary working machine is provided at the rear of the body 1 of the tractor.
When connecting the lower link 15, the lower link 5 is lowered while lowering the lift arm 9 and the lift link 10. Then, the body 1 is moved backward with the hitch frame 8 being adjusted to the height of the rotary working machine 15.

At the same time, the lock mechanism 21 of the automatic connection mechanism 7 is set to the fixed side. Then, a rotary working machine 15 is attached to a U-shaped bearing portion 17 provided on the hitch frame 8.
The fulcrum pin 16-1 of the upper arm 16 on the side is fitted.

Next, when the lift arm 9 is rotated upward, the hitch frame 8 is raised, and the connecting pins 18, 18 on the rotary working machine 15 side are fitted into the hook portions 19, 19 with this. It is connected and fixed by the automatic connection mechanism 7.

At the same time, the operating lever 22 is operated downward, and the upper joint 31-1 fixed to the operating rod 23 is fitted to the lower joint 31-2.

Therefore, since the electrodes 36 and 37 are automatically connected, the signal of the control detecting sensor 26 is transmitted to the controller 28 of the machine 1 via the harness cable 27 and the joint 31.

In order to release the connection between the machine body 1 and the rotary working machine 15, the operation lever 22 is operated in the release direction, and the joint 31 and the lock mechanism 21 of the automatic connection mechanism 7 are set to the release side. . Next, by lowering the lift arm 9 to lower the hitch frame 8 close to the ground, the hooks 19, 19 and the connecting pins 18, 18 on the rotary working machine 15 side are removed.

The fulcrum pin 16 on the upper arm 16 side
-1 is removed from the U-shaped bearing portion 17 on the side of the hitch frame 8 to divide them.

According to the above-described embodiment, the control detection sensor 26 provided on the rotary work machine 15 side and the controller 28 provided on the tractor body 1 side are connected via the harness cable 27. Cable 27-2
And the machine side harness cable 27-1
Since the connection and disconnection operation are automatically performed in conjunction with the attachment and detachment of the rotary work machine 15, the connection and disconnection of the harness café cell are performed. It is surely done. In addition, since damage to the joint portion can be prevented and the driving operation is easy, various operations can be performed efficiently.

According to the above embodiment, the joint 31 of the harness cable 27 is provided on the hitch device 6 and
Since the operation lever 22 for intermittently operating the automatic connection mechanism 7 of the hitch device 6 and the joint 31 are linked to each other, the operation means for intermittently operating the joint 31 of the harness cable 27 and the operation lever 22 of the hitch device 6 are connected. Because the structure of the operation unit is simple,
The production cost is low.

FIG. 5 shows another embodiment of a joint portion of a harness cable. In the drawing, 31A is an upper joint, 32A is a lower joint, and the upper joint 31A is freely opened and closed by a tension spring 31B. It has become.

[0025]

According to the present invention, a control sensor provided on the working machine side and a controller provided on the machine side of the tractor are connected via a harness cable, wherein the working machine side harness cable and the machine side harness are connected. The cable is connected with a coupling joint having upper and lower joints, and the connection and disconnection operations are automatically performed in conjunction with the attachment and detachment of the work equipment. Separation can be reliably performed, and damage to the upper and lower joints can be prevented. Moreover, since the operation lever for unlocking the lock mechanism provided in the automatic connection mechanism and the joint are interlockingly connected, the operation means for intermittently operating the joint of the harness cable is also used as the operation lever of the lock mechanism. As a result, the structure of the operation part of the joint and the lock mechanism can be simplified, and the manufacturing cost of the body can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing a connecting portion between a body of a farm tractor and a working machine.

FIG. 2 is a side view of a hitch portion.

FIG. 3 is a rear view of the same.

FIG. 4 is an enlarged partial cross-sectional side view of a joint part of a harness cable.

FIG. 5 is a side view showing another embodiment of the joint portion of the harness cable.

[Explanation of symbols]

 B Work machine 1 Body 6 Hitch device 7 Automatic connection mechanism 22 Operation lever 26 Control detection sensor 27 Harness cable 27-1 Machine side harness cable 27-2 Work machine side harness cable 31 Joint

Continuing on the front page (72) Inventor Hideki Kamiyama 1-32 Chayacho, Kita-ku, Osaka-shi, Osaka Inside Yanmar Diesel Co., Ltd. (72) Inventor Shuichi Togami 428 Enami, Okayama-shi, Okayama Pref. (56) References JP-A-63-254904 (JP, A) JP-A-1-116007 (JP, U) JP-A-4-136970 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] 1. A hitch device having an automatic connection mechanism.
And the work machine B can be freely connected to the tractor via a control unit. A control detection sensor 26 is provided on the work machine B side, and the control detection sensor 26 is connected to the machine body 1 via a harness cable 27. In the agricultural tractor connected to the controller 28 provided in the above, the connecting pin provided in the working machine B is connected to the automatic connecting mechanism 7 in a connected state.
Lock mechanism 21 that locks the
An operating lever 22 for unlocking is connected via an operating rod 23.
And the operating rod 23 is coupled
While installing the upper joint 31-1 of the int 31, the working machine
Attach the lower joint 31-2 of the same joint 31 to the front of B
The upper harness cable 27 to the upper joint 31-1.
-1 and work implement side c to lower joint 31-2.
Cable 27-2 and connect it with the operation lever 22.
Of the joint 31 in conjunction with the unlocking operation of the
The upper joint 31-1 is connected to the lower joy
Cutting operation from the port 31-2 side and the locking mechanism 21
The upper joint 31-1 moves the operating rod 23
Connected to the lower joint 31-2 through the
A harness cable joint structure for an agricultural tractor.