JPS5913766Y2 - Working height adjustment device for working machines such as tractors - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a working height adjusting device provided for adjusting and maintaining the working height of a working machine such as a rotary tiller of a tractor.

In the above-mentioned equipment, a height setting gauge is attached to the main body of the work equipment that moves up and down using a screw mechanism, and the operating height is set by changing the position of the gauge, and when necessary, the height regulation gauge is raised to allow work to be carried out. The structure is such that the machine can also act on nearby cylindrical parts such as ridges.

However, when the existing height adjustment device raises the height regulation gauge to a large extent, the gauge is moved in the direction of protruding away from the work equipment body. However, there is a problem in that the working machine cannot approach it at all.

SUMMARY OF THE INVENTION The object of the present invention is therefore to solve such problems and to provide an action height adjustment device that allows a working machine to approach and act on a high obstacle joint.

This will be explained below based on a specific example shown in the drawings.

The drawing shows a case in which it is implemented in a tractor tillage device, and a rotary tillage device 3...work machine...
A horizontal shaft 5 is provided at a suitable base of the fixed frame 4, and one section of a four-bar link 6 is connected and pivoted to the shaft.

The four-bar link 6 has four arms 7, 8. 9 and 10 are rotatably combined and connected, and the floating joint 11 located on the opposite side of the joint connected to the horizontal shaft 5 is fixedly equipped with a height regulation gauge 12. Here, this regulation gauge 12 is formed on a floating wheel body.

The lower end of the working height adjustment screw mechanism 14 is rotatably attached to another node 13 located below the middle, and the upper end of the screw mechanism (adjustment screw mechanism) is attached to the support arm 15.
The screw mechanism is configured to be able to expand and contract by rotating an operating handle 16 connected to the upper end and installed at the upper end.

Also, any two of the arm groups constituting the four-bar link 6
The arm of the book, for example arm 7.8, is provided with an unfixing mechanism 17 that operates with one arm 8 as a fulcrum, and this mechanism 17 is in the extended state shown in FIG.
It is formed so as to be able to engage with the other arm 7 of the articulated link 6 to prevent the four-barred link 6 from deforming.

Next, to explain the operation of the device constructed in this way, the drive and lifting operation of the rotary tillage device 3 is similar to that known by the well-known device, and the working height of the device in the lowering and working position is set. When adjusting the regulation gauge, the arm 7.8 is fixed by the fixing release mechanism 17 and the rigid four-bar link 6 is swung around the horizontal axis 5 by the telescopic operation of the adjusting screw mechanism 14. The position of 12 can be changed up and down to set an appropriate operating height.

(See Figure 1) Next, when working on the cylindrical part near the ridge,
By operating the fixing release mechanism 17 and releasing the fixation between the arms 7 and 8, the four-bar link 6 can be bent and deformed at each joint while the arm 8 is fixed. .

Therefore, when the tractor is driven backwards in this released state, when the protrusion comes into contact with the gauge 12, the gauge 12 floats upward from the position indicated by the dashed line in Fig. 1 due to this load and rides on the protrusion, causing the work equipment This means that it can be brought close to a protrusion such as a ridge and act on it.

In addition, in the process of this gauge 12 floating, the four-bar link starts to contract from its most extended position, so that the gauge is drawn toward the work machine as it rises. Therefore, when working near obstacles such as high ridges, it works in an advantageous manner.

However, if the aircraft is moved forward from this cylinder, the gauge will be 1.
2 detaches from the ridge, etc., and descends under its own weight, and the four-bar link returns to the fully extended position, again holding the work equipment at a predetermined height. All that is required is to fix the arms 7 and 8 using the release mechanism 17.

As explained above, in the present invention, the height regulation gauge 12 is attached to the work machine main body 3 by the four-bar link 6, one end of the height adjustment screw mechanism 14 is connected to the four-bar link mechanism, and one end of the height adjustment screw mechanism 14 is connected to the four-bar link mechanism. Since the fixing release mechanism 17 for preventing or canceling the deformation operation of the joint link is installed to form the working height adjustment device, it is a simple operation to release the fixation mechanism 17 and bring the four-bar link into the deformation operation state. The gauge can be placed in a floating state where it can move freely, making operation extremely convenient.

In addition, in this invention, the floating gauge in particular is drawn toward the work machine body due to the deformation of the four-bar link, so the floating gauge does not protrude far to the rear, and when working near high obstacles. This has the effect of significantly narrowing down the areas where work cannot be done.

[Brief explanation of the drawing]

FIG. 1 is a side view of a rotary tiller for a tractor embodying the present invention, and FIG. 2 is an explanatory diagram of its operation. 3...Work machine body, 5...Horizontal shaft, 6...
...Four-bar link, 12... Working height regulation gauge, 14... Adjustment screw mechanism, 17...
・Release mechanism.

Claims (1)

[Scope of utility model registration request] The height regulation gauge 12 is attached to the work machine main body 3 by a four-bar link 6, one end of the height adjustment screw mechanism 14 is connected to the four-bar link mechanism 6, and the deformation operation of the four-bar link is prevented. A working height adjustment device for a working machine, characterized in that a fixing/releasing mechanism 17 is installed to release the fixing/releasing mechanism.