JPH0662602A - Working machine connector of tractor - Google Patents

Abstract

PURPOSE:To facilitate the connection of the hitch of a tractor body to the hitch of a working machine and simultaneously automatically connect the connectors of wirings relating to a controller, etc. CONSTITUTION:The working machine connector of a tractor is characterized by separably disposing wiring connectors 5, 6 for a controller, etc., between hitches used for connecting a tractor body to a working machine, and forming the connecting terminals 7, 8 disposed in both the connectors 5, 6 with conical depressed pins 9 and projected pins 10 to be fit thereinto.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work machine connecting device for a tractor, and a wiring connector for controlling a work machine connected to a vehicle body is provided at a connecting hitch between the vehicle body and the work machine. As a result, the control connector is also connected at the same time when the working machine is connected, thereby simplifying the connecting operation.

[0002]

2. Description of the Related Art In a tractor tilling device, a working form is employed in which a tilling device is connected to a rear portion of a tractor vehicle body to control a constant working depth by the tilling device. In this case, a plowing depth potentiometer for detecting the angle of a flat plate for leveling the cultivated soil in the cultivating device, wiring of a control motor or the like for controlling and outputting the flat plate is required, and each of these connection terminals is With the connection between the hitches, it is intended to join them smoothly at the same time.

[0003]

SUMMARY OF THE INVENTION According to the present invention, control wiring connectors 5 and 6 are provided between hitches 3 and 4 for connecting a working machine 2 to a tractor vehicle body 1 so that they can be joined and separated. Each joint terminal 7 arranged in the connectors 5 and 6,
8 is a conical concave pin 9 and a convex pin 1 fitted to the concave pin 9.
0 and the working machine connecting device of the tractor.

[0004]

The function and effect of the invention The work machine 2 is connected by joining the hitch 4 of the work machine 2 to the hitch 3 of the tractor body 1. Further, the work machine 2 can be disconnected by separating the hitches 3 and 4. By such joining and separating between the hitches 3 and 4, the connectors 5 and 6 which are in a certain relational position with respect to the hitches 3 and 4 are joined and separated at the same time. Since each terminal 7 of the connector 5 is formed with a concave pin 9 having a conical shape at the front end, and each terminal 8 of the connector 6 is formed with a convex pin 10 which is easily fitted to the concave pin 9, Is smoothly guided. Therefore, by joining the hitches 3 and 4, the connectors 5 and 6 are connected.
The joining operation of the working machines can be facilitated.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A case where a tiller is mounted as a working machine 2 will be described with reference to FIGS. The tractor vehicle body 1 is a four-wheel traveling mode having front wheels 11 and rear wheels 12, and has a driver's seat 1
3, a pair of left and right lower links 1 having a steering handle 14 and the like, which is lifted and lowered by a lift arm 15 at the rear portion.
6 and the hitch 3 at the rear end of the top link 17,
Connect the hitch 4 of the tilling frame 18 of the tiller,
Raise and lower this tiller. Simultaneously with this connection, the power take-off shaft 19 from the vehicle body 1 can connect the input shaft 20 on the side of the tilling frame 18 to transmit the tiller shaft 21. 22
Is a tilling claw arranged on this tilling shaft 21. Reference numeral 23 denotes a cultivating cover, and 24 denotes a flat plate on the rear side of the cultivating cover 23, which can be freely rotated up and down about a horizontal leveling shaft 25 to level the cultivated soil surface.

The hitch 3 on the vehicle body 1 side is formed by suspending a cup link 27, which is rotatably interlocked by the power take-off shaft 19, on a hitch body 26 having an inverted U-shape by a swing arm 28 which swings in the front-rear direction. The spring 29 constantly applies tension to the rear side of the working machine 2. Further, pin guides 31 fitted to the hitch pins 30 on the rear working machine 2 side and hitch pins 30 fitted to the pin guides 31 are fitted to lower left and right sides of the hitch body 26 to prevent the pin guides 31 from coming off. A hook lever 32 is provided, and a hook 35 that engages with a hitch pin 34 of a hitch mast 33 on the working machine 2 side is provided at the center of the upper end of the hitch body 26. While raising and lowering 3, the hook 35 is engaged by scooping up the hitch pin 34, and by further raising the hitch 3, the front part of the working machine 2 is levitated and the lower hitch pin 30 is Upper hitch pin 34
The work machine is oscillated to the front side by its own weight, fitted to the opposing pin guides 31, and automatically engaged by the cook levers 32 tensioned by the springs 36, respectively. When disconnecting the hitches 3 and 4, the hook lever 32 can be manually operated and rotated to disengage the hitch pin 30 from the hook lever 32 and escape from the pin guide 31.

The hitch 4 on the working machine 2 side is composed of the hitch pins 30 located on the lower left and right sides of the transmission case 37 at the center of the tilling frame 18 and the hitch pin 34 at the upper end of the hitch mast 33 as described above. Transmission case 37
Protrudes the input shaft 20 to the front side, and the coupling 27
Can be interlocked with the spline. Also, this input shaft 20
The transmission shaft 21 is transmitted by the transmission mechanism passing through the transmission case on the lateral side via the gear mechanism or the like.

The connectors 5 and 6 are integrally attached to the hitches 3 and 4. Pin guide 3 of the hitch 3 on the vehicle body 1 side
The connector 5 is attached to the inside of 1 by the bracket 38, and the connector 6 is attached to the inside of the hitch pin 30 of the hitch 4 on the working machine 2 side by the bracket 39. Both connectors 5 and 6 are set at positions where they can face each other and be joined.

The concave pin 9 which is the terminal 7 of each harness and protrudes from the front end surface of the connector 5 is socket-shaped, and the front end portion is opened in a conical shape so that the fitting of the convex pin 10 provided facing each other can be easily guided. I am configuring. Further, each convex pin 10 that fits into this concave pin 9 projects from the tip end surface of the connector 6 and is arranged in the same phase as each concave pin 9. Also, the connectors 5, 6
The notch 40 for alignment and the protrusion 4
1 is formed, and the joint pair of the terminals 7 and 8 is determined.

Each terminal 7 of the connector 5 is connected to an electric device, a controller CPU and the like in the vehicle body 1 by a harness 42. Each terminal 8 of the connector 6 is connected to a working depth potentiometer 44 on the working machine 2 side, a motor 45 for driving the flat plate 24, and the like by a harness 43. With the outputs from these controllers, the motor is operated to rotate the flat plate 24 up and down to control it to the reference position, and the vertical turning angle of the flat plate 24 is detected by the plowing depth potentiometer to obtain this. It is fed back to the controller to control the output of the lift arm 15 to maintain a constant set depth. For example, the concave pin 9 and the convex pin 10 in the central portion are used for grounding, and the peripheral portion is used for the working depth potentiometer,
Input / output terminals for the reference, the motor, and the reference are arranged.

In FIG. 5, the difference from the above example is that a concave guide 46 and a convex guide 47 for positioning and inserting guides when the connectors 5 and 6 are connected are provided.
Is projected to the joint end face at the outer peripheral portion of. Concave guide 46
Is a leaf spring shape, and has a shape that expands to the left and right.
7 is formed in a wedge shape so as to fit into the concave guide 46. While allowing the connectors 5 and 6 to move in the rotating direction by the concave guide 46 and the convex guide 47,
The concave pin 9 and the convex pin 10 are fitted together.

6 and 7, the difference from the above example is that
The connector 5 or 6 is elastically urged to the bracket 38 or 39 by a spring 48 so that the connector 5 or 6 can be moved in the rotating direction and the inserting direction of the connector 5 against the spring 48. A pin 51 that holds a disc 49 fixed to the base of the connector 5 between the bracket 38 and the holding plate 50 and inserts the bracket 49 between the bracket 38 and the holding plate 50.
By tensioning the disk 49 with a spring 48,
It is made to pinch and is movable in the rotation direction and the connector insertion direction. Reference numeral 52 is a stopper protruding on the outer peripheral surface of the connector 5, and 53 is a pair of stoppers provided on the sandwiching plate 50, which are configured to restrict the rotation of the connector 5 within the angle of the stopper 53.

8 and 9, the difference from the above example is that
The connector 5 is swung up and down by the rotation of the hook lever 32, and by connecting the hitches 3 and 4, the connector 5,
6 is automatically fitted. The hook levers 32 provided on both the left and right sides of the hitch 3 are provided when the hitch pin 30 on the hitch 4 side is engaged with the pin guide 31.
Although it is rotated against the tension of the spring 36, a crank arm 55 is provided on the rotating shaft 54 of the hook lever 32.
A tip end of the crank arm 55 is engaged with a bracket 38 that is slidably guided in the vertical direction against the pin guide 31 to form a connector 5 integrated with the bracket 38.
When the hook lever 32 is opened by the passage of the hitch pin 30, it moves upward as shown in FIG. 9, and when the hook lever 32 is closed, it moves downward as shown in FIG. There is. Further, the connector 6 on the hitch 4 side is the connector 5
Is set to face upward.

10 and 11, the difference from the above example is that a lock lever 56 for fixing the coupling 27 of the power take-off shaft 19 to the clutch engagement (transmission) position is provided, and the lock lever 56 is manually operated. By the operation, the connector 5 is swung up and down in conjunction with the rod 58 to join and separate the connector 6. Crank arm 55 for vertically moving the bracket 38 of the connector 5
The shaft 60 is pivotally supported on the hitch body 26, the lock arm 59 is integrally provided on the shaft 60, and the rod 58 is connected. A lock arm 59 looking into the swing range of the swing arm 28 locks the swing position of the swing arm 28 toward the working machine 2 side by the spring 29, and the coupling arm 27 of the coupling 27 by the swing arm 28 is locked. The fitting connection to the input shaft 20 is locked so as not to be disengaged, and the transmission is maintained to the working machine 2 side. In this transmission position of the coupling 27, the lock lever 56 is locked in a state where the lock lever 56 is disengaged from the cam 57 on the hitch body 26 (FIG. 11), and the lock lever 56 is locked.
When the cam is engaged with the cam 57, the lock is released (see FIG. 1).
0).

The lock lever 56 may have a structure in which a clutch provided between the power take-off shaft 19 and the coupling 27 is locked to the engaged position.

[Brief description of drawings]

FIG. 1 is a perspective view of a connector portion.

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

FIG. 3 is a perspective view of a hitch portion.

FIG. 4 is a side view of the tractor.

FIG. 5 is a perspective view of a connector part showing another embodiment.

FIG. 6 is a perspective view of a connector portion showing another embodiment.

FIG. 7 is a side sectional view thereof.

FIG. 8 is a perspective view of a hitch portion showing another embodiment.

FIG. 9 is a perspective view showing the operation.

FIG. 10 is a perspective view of a hitch portion showing another embodiment.

FIG. 11 is a perspective view showing the action.

[Explanation of symbols]

 1 vehicle body 2 working machine 3 hitch 4 hitch 5 connector 6 connector 7 terminal 8 terminal 9 concave pin 10 convex pin

Claims (1)

[Claims] 1. A control wiring connector (5, 6) is provided between the hitches (3, 4) for connecting a working machine (2) to a tractor body (1) so that they can be joined and separated, and both connectors (5, 6) are connected.
A work machine coupling device for a tractor, in which each of the joining terminals 7, 8 disposed therein is composed of a conical concave pin 9 and a convex pin 10 fitted therein.