JPS586247Y2 - Agricultural tractor work equipment coupling device - Google Patents

Description

[Detailed explanation of the invention] This invention is for agricultural tractor work +! 1. This relates to a tying device.

Tractor work such as plowing, puddling, and ridge-building is performed by connecting working equipment such as a tractor rotary. Although there are no particular problems when working with a tractor on flat land, in fields etc., the ground surface is often uneven and sloped, and this is difficult. The tractor also leans accordingly.

Therefore, in the conventional coupling structure between a tractor and a working machine, the working machine tilts to follow the tractor, and the plowing depth differs depending on the left and right sides, which hinders subsequent agricultural work and creates the risk of fire, which has a serious negative impact on crop development. have.

The object of this invention is to provide a working machine coupling device for an agricultural tractor that can solve the above-mentioned drawbacks.

This invention provides a bracket attached to the rear end of the tractor body so as to be rotatable left and right about the axis of a PTO shaft protruding from the rear end, and is connected to the PTO shaft via a universal joint. A lift arm is provided, in which a working machine is connected to the bracket in a freely undulating manner, and a pair of left and right lift links, at least one of which has a cylinder, is extendable and retractable, and both ends of these lift links are provided on both sides of the body of the tractor; It is swingably connected to both ends of the working machine using a universal joint.

In other words, when the tractor is tilted on rough ground, by expanding and contracting the cylinder of the lift link, the work equipment and the bracket connected to it are rotated in the opposite direction to the direction in which the tractor is tilted. It is constructed so that it can be cultivated.

An embodiment of this invention will be explained based on the drawings.

Reference numeral 1 designates a tractor, and a U-shaped bracket 4 that opens rearward when viewed from the top is rotatably attached to the rear end 3 of the body 2 of the tractor.

That is, a PTO shaft 5 protrudes from the rear end 3 of the body 2, and a plurality of screws 6 are erected on a circumference centered on the PTO shaft 5.

An opening 8 for protruding the PTO shaft 5 is provided on the surface 1 of the bracket 4 facing the rear end 3 of the body 2.
An arcuate long hole 9 corresponding to the screw 6 is formed.

Therefore, the spacer 10 and the arcuate long hole 9 are attached to the screw 6.
The bracket 4 is rotatably mounted around the PTO shaft 5 by sequentially inserting the nut 11 and the spacer 10 and screwing together the nut 11 and the nut 12 that prevents the nut 11 from rotating.

Further, a semicircular notch 14 is formed at the rear end of the side plate 13 of the bracket 4, and holding pieces 15 are fixedly provided above and below this notch 14 to face each other.

A rotary 17, which is a working machine, is provided with a connecting rod 16 installed horizontally at its tip.

This rotary 17 has a connecting rod 16 inserted into the notch 14, and a pin 1 with the connecting rod 16 inserted into the holding piece 15.
They are connected by stopping the removal at 8.

The rotary 11 includes a tilling section 20 and a tilling depth adjusting section 21 connected to the PTO shaft 5 via a universal joint 19.

Lift arms 22 are provided on both sides of the rear of the fuselage 2, and a lift link 2 is connected to the rear end of these lift arms 22 via a ball joint 23, which is a universal joint.
One end of 4 is connected.

The other ends of these lift links 24 are connected to both sides of the rotary 17 via ball joints 23 that are universal joints.

One of the lift links 24 (the right side in this embodiment) is extendable and retractable by providing a cylinder 25 in the middle thereof.

In such a configuration, plowing work is performed by driving the tractor 1 while driving the plowing section 20, but if the tractor 1 leans to the left due to unevenness or inclination of the ground surface, the right rift) IJ actuating its cylinder 25 to stretch the link 24, thereby causing the rotary 1
1 and bracket 4 are rotated to the right relative to the tractor 1.

That is, even if the tractor 1 is tilted, the rotary 17 is pushed back by the lift link 24 extending on the right side and is maintained horizontally, so that the left and right plowing depths can always be equally plowed.

Conversely, when the tractor 1 tilts to the right, the right side of the rotary 11 is pulled by the lift link 24 and maintained horizontally by shortening the right lift link 24.

In this way, by making the left and right tilling depths uniform,
There is no problem with subsequent agricultural work, and the crops develop well.

Note that the means for holding the bracket 4 so as to be rotatable left and right is not limited to the above-mentioned embodiments, and for example,
A cylindrical or annular boss may be provided upright at the rear end of the body 2 of the tractor 1, and a cylindrical portion or a circular hole formed on the facing surface 7 of the bracket 4 may be rotatably fitted into the boss.

In this case, as a means for preventing the bracket 4 from being removed, it is sufficient to screw a nut or insert a pin into the boss from the layer top tl of the facing surface T of the bracket 4.

Since this invention is constructed as described above, even if the tractor leans to the left or right due to traveling on uneven ground, the lift link can be expanded and contracted to maintain the work equipment horizontally, and at this time, the work equipment can be kept horizontally. Since the work equipment rotates together with the bracket, there is no change in the state of connection with the PTO shaft or the connection state with the machine body.Also, since the end of the lift link is connected via a universal joint, the work equipment rotates with the bracket. Even when the soil is tilted, no strain is placed on the connecting parts at all, and this makes it possible to equalize the plowing depth on both sides, making it easier to carry out the next farming operation and ensuring good crop growth. It is effective.

[Brief explanation of drawings]

The drawings show one embodiment of this invention; Fig. 1 is a side view, Fig. 2 is a partially enlarged side view with one side of the bracket cut away, and Fig. 3 is a partially cutaway side view of the bracket. FIG. 1...Tractor, 2...Airframe, 3...
...Rear end, 4...Bracket, 17...
... Rotary (work equipment), 22 ... Lift arm, 23 ... Ball joint (universal joint)
, 24...Lift link, 25...Cylinder.

Claims (1)

[Scope of utility model registration request] A PTO that protrudes from the rear end of the tractor body.
A bracket is provided so as to be rotatable left and right about the axis of the shaft, and a working machine connected to the PTO shaft via a universal joint is connected to the bracket in a freely undulating manner, and at least one of the brackets has a cylinder. A pair of left and right lift links that extend and contract are provided, and both ends of these lift links are swingably connected to lift arms provided on both sides of the body of the tractor and both sides of the work machine by universal joints. Work equipment connection device for agricultural tractors.