JPH0448644Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to a work equipment fixing device for locking a fertilizer application device or the like connected to the rear of a tractor at a predetermined lifting position.

(b) Prior art As for a fertilizer spreading device that is supported in a vertically movable manner via a parallel link mechanism at the rear of a power agricultural machine such as a tractor, for example, Japanese Utility Model Application Publication No. 55-33045 and Japanese Utility Model Application Publication No. 55-152933 are disclosed. There are some things described in .

(c) Problems to be solved by the invention In such a conventional device, the height of the parallel link can be adjusted by turning a handle interposed between the parallel link and a fixed frame fixed to the fuselage side. When loading fertilizer, it was necessary to turn this handle to lower the link and then fill the hopper with fertilizer.Furthermore, in order to set this parallel link in the designated location, ,
The handle must be turned again to move the parallel link upward, and this operation is extremely complicated.

(d) Means for solving the problem This invention is proposed in view of the above problem, and it is possible to adjust the height of the parallel link by using a hydraulic lifting mechanism equipped on the tractor. It is an object of the present invention to provide a fixing device for a fertilizer applicator that can be installed extremely easily and quickly set in a predetermined position without requiring any effort.

For this reason, this invention has taken the following technical measures.

That is, the rotary tiller 4 is connected to the rear of the machine body 1 via a hydraulic lifting mechanism so as to be movable up and down, and between the machine body 1 and the rotary tiller 4 and above the rotary tiller 4, there is a parallel link mechanism. A fertilizer applicator 14 having a fertilizer storage section 17 is connected to the machine body 1 via a link rod 8 , and a rotary tiller 4 and this parallel link mechanism 8 are connected via an interlocking rod 24 .
A working machine fixing device configured to be able to move up and down in conjunction with each other, and characterized in that two link members 9, 9 constituting a parallel link mechanism 8 are provided with a locking device 20 for locking them in a lifting position. The structure is as follows.

(E) Embodiments and their effects Hereinafter, embodiments of this invention will be described based on the drawings.

First, to explain the configuration, 1 is a tractor,
A hydraulic cylinder case 2 containing a hydraulic cylinder is installed at the rear of the tractor 1, and lift arms 3, 3 are mounted on the left and right sides of the case 2.
It is pivoted so that it can rotate freely. A rotary tiller 4 is located at the rear of the tractor 1, and the tips of two arm rods 5, 5 extending forward from the front of the rotary tiller 4 are connected to the lower part of the rear of the tractor. After fitting and attaching it to the horizontal pins 6, 6 from the rear, insert the retaining pin and connect it.
The intermediate portions of the arm rods 5, 5 and the lift arms 3, 3 are connected by lift rods 7, 7, and when the lift arms 3, 3 rotate, the rotary tilling device 4 rotates about the horizontal pins 6, 6. It is configured to rotate in the vertical direction. Reference numeral 8 denotes a parallel link mechanism consisting of two links 9, 9 of equal length, and the front side of the parallel link mechanism 8 is supported by a column 11 erected obliquely rearward and upward from the rear of the rear axle housing 10. It is being 12 and 13 are U-shaped frames provided before and after the links 9, 9. A hexagonal pipe 16 for inserting a support 15 that supports the main body of the fertilizer applicator 14 is fixed to the back side of the U-shaped frame 13 on the rear side.

The fertilizer applicator 14 has a fertilizer storage hopper 17 and a feeding section 1.
8, a fertilizing pipe 19, etc., and the feeding section 18 is driven by a motor not shown.

Reference numeral 20 denotes a locking rod having a notch 21 and a sliding portion 22, which is disposed diagonally between two parallel links 9, 9.
1 is fitted into the lower branch pin 23 of the rear U-shaped frame 13, this parallel link mechanism 8 is locked.

Vertical height adjustment of the parallel link mechanism 8 is performed by an interlocking rod 24 pivotally connected to the lower branch pin 23, and a U-shaped arm 25 fixed to the lower part of the interlocking rod 24 is inserted into the arm rod 5. The entire rotary tillage device 4 is moved up and down by engaging a horizontally oriented pin 26 (pivot pin of the lift rod 7) provided at the top of the rotary tiller 4, so that the entire fertilizer applicator 14 can also be moved up and down.

In the figure, reference numeral 27 is a spring stretched between the parallel links 9, 9, 28 is a tilling claw of the rotary tiller 4, and 29 is a stand that supports the fertilizer applicator when not in use.

Next, the effect will be explained.

When lifting the fertilizer storage hopper 17 filled with fertilizer upward, as shown in FIG. Letter-shaped arm part 2
5 into the pin 26 of the arm rod 5.

When the rotary tillage device 4 is moved upward via the hydraulic lifting device in this state, the parallel linkage mechanism 8 is pushed from below by the interlocking rod 24 and changes its shape, and the lower branch pin 23 moves to the locking rod 20 at the maximum raised position. It relatively approaches inside the notch 21 and fits into the notch 21. (The state shown in FIG. 2) If only the interlocking rod 24 is removed from the pin 26, the main body of the fertilizer applicator 14 can be fixed at a predetermined lifting position regardless of the vertical movement of the rotary tillage device 4. On the other hand, when lowering the fertilizer to add fertilizer, the locking rods 20, 20 of the parallel links 9, 9 in the lifting position are rotated upward, and the lower fulcrum pin 23 to leave.

Then, the fertilizer applicator 14 descends under its own weight, and the fertilizer storage hopper 17 descends to a low position from the ground, making it easy to fill with fertilizer.

Furthermore, when the fertilizer applicator 14 is not in use, it is safe and convenient to insert the support 15 of the fertilizer applicator 14 into the upper part of the stand 29 while maintaining its effectiveness so that it does not fall over.

In addition, in this embodiment, the rotary tillage device 4
Although the single fertilizer applicator 14 is linked to the front side of the fertilizer 14 so as to be lifted up and down freely, two or more fertilizer applicators are attached to the rear of the parallel link mechanism 8, and the fertilizer applicator 14 is configured to be moved up and down simultaneously or selectively. You may.

(f) Effects of the invention Since this invention is constructed as described above, it has the following technical effects. That is, the main body of the fertilizer applicator 14, which is additionally filled with fertilizer, can be moved upward using the hydraulic lifting mechanism mounted on the fertilizer applicator 1, thereby facilitating the replenishment work. Furthermore, since no special lifting mechanism is required, the entire device can be manufactured at low cost. Further, when the fertilizer applicator 14 is moved upward via the hydraulic lifting mechanism to the maximum lifting position, the locking device 20 is automatically activated to hold the fertilizer applicator 14 in a predetermined set position. This eliminates the need for cumbersome operations such as turning the handle for raising and lowering each time as in the past, significantly improving work efficiency.

[Brief explanation of drawings]

The figures show examples of this invention;
The figure is a side view, FIG. 3 is a perspective view of essential parts, and FIG. 4 is a side view. Explanation of symbols, 1... Tractor, 3... Lift arm, 4... Rotary tillage device, 5... Arm rod, 8... Parallel link mechanism, 14... Fertilizer application device (fertilizer), 17... Fertilizer storage Hopper, 20...
Locking device (locking rod), 24... interlocking rod (interlocking rod).

Claims (1)

[Scope of utility model registration request] A rotary tiller 4 is connected to the rear of the machine body 1 via a hydraulic lifting mechanism so as to be movable up and down, and a parallel link mechanism 8 is provided between the machine body 1 and the rotary tiller 4 and above the rotary tiller 4.
A fertilizer application device 14 having a fertilizer storage section 17 is provided via the fertilizer storage section 17.
is connected to the machine body 1, and a rotary tillage device 4 is also connected to the machine body 1.
The parallel link mechanism 8 is configured to be able to move up and down in conjunction with an interlocking rod 24, and the two link members 9, 9 that make up the parallel link mechanism 8 are provided with a locking device 20 that locks them in a lifting position. A work machine fixing device characterized by being provided with.