JP2753660B2 - Work vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates, is relates to a working vehicle such as a tractor.

[0002]

2. Description of the Related Art In general,
Some of the working portion which is detachably connected to a working vehicle such as this type tractor, for example, rotary plow type as the rear cover movement control mechanism or the like provided in the working unit, create the dynamic control mechanism operated control driving of the electric motor Some are provided. However in the conventional electric motor with work kinematic control mechanism
Because it was provided in the working portion Mademo, vehicle body the working unit
, It is necessary to wire the harness for the electric motor from the traveling machine body side to the working unit side . For this reason,
The workability is inferior due to the need to connect and disconnect the harness (coupler part) each time the work unit is attached and detached for replacement, etc. Also , if you drive with the work unit removed and you forget to disconnect the harness Had the disadvantage of cutting the harness, which was a problem.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has been made with the object of providing a working vehicle capable of eliminating these disadvantages. removably coupled, ene from PTO shaft
In a working vehicle provided with an operation control mechanism that is operated and controlled based on the drive of an electric motor, a work unit that performs work by inputting gin power is provided with an electric motor on the traveling machine body side, The electric motor and the operation control mechanism,
It is characterized in that it has consolidated through a universal motive power transmission mechanism disconnects in tandem to the working portion detachable. The present invention has as as possible out unnecessary to wire Yotsute, a harness for the electric motor to the working unit in this configuration.

[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 3 is connected to a rear portion of the traveling body 1 via a lifting link mechanism (not shown) and an automatic hitch mechanism 2 so as to be able to move up and down. The working unit 3 moves up and down based on the vertical swing of the lift arm 4 accompanying the expansion and contraction operation of a hydraulic cylinder (not shown). These basic configurations are the same as those of the related art.

A top hook 6 pivotally connected to the tip of the top link of the lifting link mechanism is fixed to the center upper end of the hit frame 5 constituting the automatic hitch mechanism 2. A lower hook 7 pivotally connected to each end of the left and right lower links of the lifting link mechanism is fixed, and the work unit 3 is raised while the top hook 6 is locked to the top mast 8 on the work unit 3 side. Thus, the connecting pin 9 on the working section 3 side is automatically engaged with the lower hook 7 so that the working section 3 is automatically mounted. Reference numeral 10 denotes a PTO connecting portion provided at a central portion of the hitch frame 5, and an input side of the PTO connecting portion 10 is connected to a PTO shaft 12 of the traveling body 1 via a universal joint 11 in advance. On the other hand, the output side of the PTO connecting section 10 is automatically connected to the input shaft 13 of the working section 3 in accordance with the above-mentioned automatic mounting, and is automatically separated when the working section 3 is disconnected. Is configured.

On the other hand, the working unit 3 includes a gear case 14 in which the input shaft 13 protrudes forward,
And a tilling claw 16 that is rotated by power passing through a chain case 15, a main cover 17 that covers the rotation locus of the tilling claw 16, and a rear cover 18 that is provided at the rear of the main cover 17 so as to be vertically swingable. However, the pivotal support portion 18a at the base end of the rear cover 18 is provided with a guide member 19 that is movable back and forth along the arc of the main cover 17.
Are connected integrally.

Further, reference numeral 20 denotes a cylinder interposed between the pivot portion 18a of the rear cover 18 and the top mast 8. The cylinder 20 is configured to extend and contract based on the driving of the electric motor 21. The electric motor 21 is provided in the automatic hitch mechanism 2 for controlling the movement of the rear cover 18 based on the expansion and contraction. That is, on the side of the automatic hitch mechanism 2, the electric motor 2
1 and a drive-side clutch wheel 22a is fixedly mounted on the motor shaft 21a. On the working unit 3 side, a guide cylinder 2
3, a distal end of a flexible wire 24 drawn out of the cylinder 20 is inserted, a driven clutch wheel 22 b is provided on the distal end, and the driven clutch wheel 22 b is attached forward by a coil spring 25. I'm going. When the working unit 3 is connected to the automatic hitch mechanism 2, the clutch wheels 22a and 22b mesh with each other, and the power of the electric motor 21 is transmitted to the cylinder 20 via the flexible wire 24. In the retracted state, the clutch wheel 22a,
The power transmission to the cylinder 20 is cut off based on the separation at 22b.

Reference numeral 26 denotes a tillage depth sensor which detects the tillage depth based on the swing angle of the rear cover 18.
1, is provided in the automatic hitch mechanism 2. That is, on the side of the automatic hitch mechanism 2, the cultivation depth sensor 26 is arranged so that the input shaft 26 a protrudes leftward, and the detection lever 27 is fixed to the input shaft 26 a. A swing arm 29 is pivotally supported by a bracket 28 provided at a position facing the detection lever 27, and the swing arm 29 is connected to an inner wire 30 which is pushed and pulled as the rear cover 18 swings. .
When the working unit 3 is connected to the automatic hitch mechanism 2, the bent piece 27 a of the detection lever 27 is elastically pressed against the swing arm 29 by the urging force of the return spring 31, thereby causing the swing change of the rear cover 18. Is transmitted to the till depth sensor 26. Reference numeral 32 denotes a return arm of the swing arm 29.

Further, reference numeral 33 denotes a cylinder length detecting sensor which detects the operating length of the cylinder 20, which is also an automatic hitch mechanism similar to the electric motor 21. 2 is provided. That is, on the side of the automatic hitch mechanism 2, the cylinder length detection sensor 33 is disposed so that the input shaft 33 a protrudes to the right outside, and the detection lever 34 is fixed to the input shaft 33 a. A pivot rod 36 is pivotally supported by a bracket 35 provided at a position facing the detection lever 34, and the pivot rod 36 is pushed and pulled as the cylinder 20 expands and contracts.
It is connected to. When the work unit 3 is connected to the automatic hitch mechanism 2, the bent piece 34a of the detection lever 34 is
Is elastically pressed against the swing arm 36 by the urging force of the return spring 38 so that a change in the cylinder length of the cylinder 20 is transmitted to the cylinder length detection sensor 33.

In the embodiment of the present invention constructed as described above, the rear cover 18 which can move back and forth along the arc of the main cover 17 moves based on the expansion and contraction operation of the cylinder 20 accompanying the forward and reverse driving of the electric motor 21. Although the electric motor 21 is controlled, the electric motor 21 is disposed on the auto hitch mechanism 2 on the traveling body 1 side, and is automatically linked to the cylinder 20 when the working unit 3 is mounted on the traveling body 1. Becomes Therefore, unlike the related art in which the electric motor 21 is arranged on the working unit 3 side, the wiring on the traveling body 1 side is sufficient without wiring the harness for the electric motor 21 to the working unit 3. As a result, the harness is
Harness when exchanging huh kills with eliminate a disadvantage that disconnection by bending Rica, the working unit 3 on the basis of the elevating (coupler portion)
It is possible to improve the workability by eliminating the disconnection of the harness, and it is also possible to eliminate the disconnection of the harness due to forgetting to remove the coupler.

In addition, since the electric motor 21 can be used even when different types of working parts are connected, the parts can be effectively used.

Further, in the embodiment, the tillage depth sensor 2
6 and the cylinder length detection sensor 33 are disposed on the auto hitch mechanism 2 in the same manner as the electric motor 21.
The harness for 6, 33 can be unnecessary to wire to the working portion 3, as a result, harnesses for both sensors 26 and 33 is cut with even eliminate inconvenience of cutting.

[0013]

[Effects] In summary, since the present invention is constructed as described above, the working unit connected to the traveling machine is
The electric motor is provided with an operation control mechanism that controls the operation based on the drive of the electric motor.
The electric motor and the operation control mechanism are
Via a power transmission mechanism that can be separated and connected to the
Will be linked. As a result, the electric motor is
When attaching and detaching the work unit, as in the past,
Connect and disconnect the harness for the electric motor.
Permission that can improve workability without having to do it
Not, as possible also de solutions anti inconvenience that would cut the harness forget the disconnection of the harness.

[Brief description of the drawings]

FIG. 1 is a side view of a working unit.

FIG. 2 is a front view of an automatic sheep mechanism.

FIG. 3 is a plan view of a main part of an automatic hit mechanism and a working unit.

FIG. 4 is a side view of a main part of a working unit.

FIG. 5 is a side view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Traveling body 2 Auto hitch mechanism 3 Working part 20 Cylinder 21 Electric motor

Claims (1)

(57) [Claims] 1. A PTO which is detachably connected to a traveling body.
An electric motor is arranged on the traveling machine side in a working vehicle in which an operation control mechanism that is operated and controlled based on the drive of an electric motor is provided in a work unit that works by inputting engine power from a shaft. Together with the electric motor and operation control
Mechanism and a working vehicle, characterized in that it has consolidated through a universal motive power transmission mechanism disconnects in tandem to the working portion detachable.