JP2724455B2 - Work machine coupling device in 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 tractor working machine connecting device for connecting a working machine having a detecting device to a hitch frame mounted on a rear portion of a tractor via a link.

[0002]

2. Description of the Related Art Conventionally, a hitch frame is mounted on a rear portion of an airframe via a link, and a work implement having a detecting device such as a tillage depth detecting device or a horizontal control detecting device is connected to the hitch frame. In the prior art, a rod, a wire, or a socket for transmitting a detection signal of a detection device to a control unit of a machine body is separated before removing the work machine , and is connected again after connection.

[0003]

In the known tractor, a means for transmitting a detection signal of a detection device attached to the work machine to a control unit of the body is provided every time the work machine is connected to or removed from the hitch frame. Must be connected or disconnected separately, therefore removing the implement from the hitch frame
Separately by removing the detection signal transmission means of the detection device
Operation is very time consuming and extremely troublesome.
there were. In addition, if the work unit is removed without necessity of separating the transmission unit, the transmission unit may be damaged.

[0004]

According to the present invention, a hitch frame is mounted on a rear portion of a fuselage via a link, and connected portions are provided at upper and lower portions of the hitch frame. Attached to the upper and lower connecting portions detachably, and in a tractor with a detection device attached to the working machine, in the vicinity of a position corresponding to the connecting portion of the working machine,
Connect the rear socket connected to the detection device to the main
Fixedly attached to the bracket over arm, fixedly <br/> mounted front sockets interlocking the hydraulic system for raising and lowering it to the hitch frame bracket horizontal frame of the hitch frame, front Terminals are installed in the rear socket and the rear socket, respectively.
One of the terminals is connected to the front socket or rear
When the front socket and the rear socket are opposed to each other in the left-right direction and the vertical direction and a working machine is connected to the hitch frame , the front socket and the rear socket are substantially simultaneously urged toward one of the sockets . When the work machine is connected to the hitch frame by the configuration in which the terminals are connected, the connection portion of the means for transmitting the detection signal of the detection device attached to the work machine is automatically connected,
When the work machine is removed from the hitch frame, the above-mentioned problem is solved by automatically separating the transmission means.

[0005]

When the connected part of the hitch frame is engaged with the connecting part of the working machine and the working machine is connected to the hitch frame, substantially
The means for transmitting the detection signal of the detection device attached to the working machine to the control unit of the machine is automatically connected, and when the working machine is removed from the hitch frame, the connecting portion of the transmitting means is automatically connected. To separate.

[0006]

An embodiment of the present invention will be described with reference to the drawings .
First, a diagram of a connection part configuration of a working machine which is a premise of the present invention
Explaining with reference to FIGS. 1 to 3, a hitch frame 5 is mounted behind a transmission case 1 via a top link 2 and lower links 3, 3. The lower link 3 is lifted by a lift arm 4 via a lift rod. Up and down. The shaft 8 at the rear of the yoke joint 7 connected to the PTO shaft 6 is loosely fitted in the center hole of the horizontal frame connecting the lower portions of the hitch frames 5,
The input shaft 11 of the working machine 10 including the shaft 8 and the rotary tilling device is supported by bearings and a ring-shaped cushioning material, and is connected and disconnected by clutches 12a and 12b.

The main frame 5a of the hitch frame 5 is made of an inverted U-shaped pipe. A hook 13 is fixed at the center of the upper part. A hook plate 17 pivotally supported on the front connecting plate 15 by a fulcrum pin 16 is attached, and the hook plate 17 is inserted into a hole 17a formed in the hook plate 17 so that the hook plate 17 can be attached to the working machine by inserting a horizontal lock pin. The front connecting plate 15 can be locked, and is fixed to the lower portion of the main frame 5a. The front connecting plate 15 is connected to the rear end of the lower link 3 by a pin 18.

The work machine 10 includes a top mast 20 erected on the upper portion of the main frame 5a and a tool mast 2 extending rearward.
1 comprises a tail wheel 22 supported at the rear, a main cover 23 covering the tilling section, and a rear cover 25 rotatably hinged to the rear of the main cover 23 and serving as a tillage depth detecting device. The rear connecting plates 26, 26 extending forward from both lower sides of the main frame 5a have connecting pins 27, 2 connected thereto.
7 is attached to the upper connection fitting 28 fixed to the top mast 20 and extended forward.
Are fixed through the upper connecting pin 30 to be engaged.

A metal fitting 31 erected on the rear surface of the rear cover 25 is connected to a rear connecting link 37 via links 32, 33, 34, 35, and the rear connecting link 37 is connected to a hole of a guide plate 39. The front end is bent in the lateral direction to form an engaging portion 38, which is fitted back and forth so as to be able to move back and forth, and the front end thereof is bent downward to lower the rear cover 25 most. In this state, it is located on a straight line with the upper connecting pin 30.

A support arm 40 fixed to the side surface of the hook body 13 pivotally supports an intermediate portion of a front connection link 41 in a vertical direction, and the front connection link 41 is provided at an upper portion with the rear connection link 37. Has a U-shaped opening into which the engaging portion 38 is fitted, and the lower portion of the wire 4 has a return spring 42 interposed therebetween.
3. A control valve of a hydraulic device 47 for operating the lift arm 4 is connected via a swing arm 45 and a rod 46 whose forward tilt is limited by a stopper 44.

Reference numeral 48 denotes a rear outer receiver suspended from the main frame 5a, and reference numeral 50 denotes a lock nut which fastens the front outer receiver so as to be able to advance and retreat.

In the tractor described above, when the hitch frame 5 is raised by retracting the body to connect the working machine 10 to the hitch frame 5, the hook 1
3a engages the upper connecting pin 30 from below. that time,
The rear cover 25 is most lowered and the rear connecting link 37
Of the front connection link 41 is aligned with the hook portion 13a.
When the hook body 13 is fitted to the upper connecting pin 30, the opening of the front connecting link 41 is fitted to the engaging portion 38 of the rear connecting link 37. I do.

When tilling work is performed in this state, the rear cover 25 tilts up and down in accordance with the tilling depth, which
The power is transmitted to the control valve of the hydraulic device 47 via the rear connection link 37, the front connection link 41, the wire 43, the swing arm 45, and the rod 46, whereby the lift arm 4 is tilted up and down, and the work machine is raised and lowered. I do.

The present invention relates to the connecting portion described with reference to FIGS.
An embodiment of the present invention will be described with reference to FIGS. 4 to 7. In this embodiment, the tilt amount of the rear cover 25 is detected by a rod 51 through an angle detector 52 such as a potentiometer. Harness 5
3. Transmission to the solenoid valve of the hydraulic device 47 by the rear socket 55, the front socket 56, and the harness 57. The rear socket 55 is attached to a bracket 59 projecting forward from a main frame 58 of the working machine 10.
Fixed mounting, front socket 56 is hitch frame 5
5 is fixedly mounted on a bracket 61 protruding rearward from the upper surface of the horizontal frame 60, and is installed so as to be joined as shown in FIG. The terminals 62, 62 of the front socket 56 have a wide flat rear end and are held by the receiving plate 63, and the terminals 64, 6 of the rear socket 55.
Reference numeral 4 denotes a spherical front end, which is held by a receiving plate 65 so as to be able to advance and retreat, and a rear end thereof is attached via a coil spring 66 .
Since the energized is pressed against the receiving metal 67 leading to the harness 53 can be slightly shifted left and right vertical position before and after the front socket 56 and a rear socket 55 maintains the energized state, the rear end surface of the front socket 56 As shown in FIG. 7, the rubber cap 68 is pressed against the flat end face of the front portion of the rear socket 55 to prevent intrusion of mud and the like when the two are joined as shown in FIG. The front socket 56 and the rear socket 55
The same effect can be obtained by replacing
It is.

When not in use, the front and rear sockets 55, 56
The waterproof cap 69 is attached to the opening of the above. The above-described tillage depth detecting device can be replaced with or used in combination with a horizontal detecting device or another detecting device for controlling a working machine.

[0016]

According to the present invention, a hitch frame is mounted on a rear part of a machine body via a link, and connected parts are provided on upper and lower parts of the hitch frame. while connecting the connecting portion provided detachably in tractor attaching a detection device to the working machine, in the vicinity of the position corresponding to the connecting portion of the working machine, the working machine rear socket tandem to said detecting device Main frame bracket
Fixedly attached to the bets, front socket the hitch which is interlocking in the hydraulic system for raising and lowering it to the hitch frame
Fixedly attached to the bracket of the horizontal frame of the frame,
Terminals are provided on the socket and the rear socket respectively.
Connect either terminal to the front socket or rear socket
Or movably and configured to urge the Re, when connecting the working machine hitch frame with opposed and said the front portion socket rear socket in the horizontal direction and the vertical direction, substantially simultaneously
Since the terminal of the front and rear of the socket is configured to be coupled, when connecting the working machine hitch frame mounted on the rear of the tractor and transmits the detection result of the detection device being mounted on the work vehicle to the control unit The terminal of the front socket and the rear socket of the means can be connected almost simultaneously at the same time , so that the operator does not need to get off the tractor and connect the connection part to the transmission means as in the prior art, and When the work machine is removed, the operation for starting the connection is not required, and when the work machine is removed, the front and rear sockets can be automatically separated, so that work efficiency can be improved. And later
When the socket is fixedly attached to the work equipment frame,
The hitch frame has a hydraulic device that raises and lowers it.
Fix the connected front socket to the hitch frame
And without the terminals provided on the front and rear sockets respectively.
One of them is biased so that it can advance and retreat,
At the same time, the connection of the connecting part of the transmission
It can be done automatically with the work.

[Brief description of the drawings]

FIG. 1 is a plan view of a main part.

FIG. 2 is a side view showing a working machine connection preparation state.

FIG. 3 is a side view showing a connection state of the same.

FIG. 4 is a side view showing a work machine connection start state or a state immediately after removal.

FIG. 5 is a side view showing a work machine connection completed state.

FIG. 6 is a sectional view of a socket.

FIG. 7 is a sectional view of a socket.

[Explanation of symbols]

 2 Top link 3 Lower link 5 Hitch frame 10 Work implement 13 Hook body 15 Front connection plate 17 Hook plate 25 Rear cover 27 Connection pin 28 Upper connection fitting 30 Upper connection pin 37 Rear connection link 41 Front connection link 55 Rear socket 56 Front Socket

Claims (1)

(57) [Claims] 1. A hitch frame is attached to a rear portion of a fuselage via a link, connected portions are provided at upper and lower portions of the hitch frame, and connection portions provided at upper and lower portions of the working machine with respect to the connected portion. In a tractor having a detection device attached to the work machine, a rear socket connected to the detection device is connected to the main frame of the work machine in the vicinity of a position corresponding to the connection portion of the work machine. Fixed to bracket
Attachable, said hitch frame interaction activity has been front socket hydraulic system for raising and lowering it to the hitch frame
Fixed to the bracket of the horizontal frame of the front socket
And the rear socket are provided with terminals, respectively, and either one is provided.
Terminal to either the front socket or the rear socket.
When the front socket and the rear socket are opposed to each other in the left-right direction and the vertical direction and the working machine is connected to the hitch frame, the terminals of the front and rear sockets are connected substantially simultaneously. A work implement coupling device for a tractor, characterized in that it is configured as described above.