JPS586244Y2 - rotary stork - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to mounting a rotary tiller on a riding type agricultural tractor.

Conventionally, one method for attaching a rotary tiller to a riding agricultural tractor is the two-point hook method;
In the point-and-sink method, the frame of the rotary tiller is rotatably connected to left and right opposing brackets that are protruded from the rear end of the tractor across the power output shaft, and a lifting link mechanism is used. Therefore, the impact that the tilling claw receives during tilling work is concentrated on the part of the working machine frame that is pivoted to the tractor-side bracket, and this part is likely to be damaged.

For this reason, in the past, the frame of the work equipment was constructed with a thick steel plate to increase its strength and prevent damage to the pivot parts, but on the other hand, the weight of the work equipment increased, making it difficult to handle. In addition, the overall structure of the work machine becomes complicated, its construction costs become high, and its productivity decreases.
There were various drawbacks.

The present invention was devised to eliminate the above-mentioned drawbacks, and the frame of the rotary tiller is attached to the rear of the tractor by sandwiching the power take-off shaft from the rotary cover that covers the upper part of the rotation trajectory of the rotary tiller. The front part of the frame is bulged inward to form a bulging molded part, and the front part of the frame is extended at the pivot joint part 1 of the projecting work equipment mounting bracket, and a bulging molded part 7b is provided on the outside of the frame. , 7b' is attached, and its proximal end side is integrally fixed to the rotary case, and the bulging molded part is positioned inside the mll bracket, and the bulging molded part is provided with a reinforcing plate that extends outward. By providing a protruding pivot shaft and configuring the rotary tiller to be rotatably connected to the tractor via the pivot shaft, the frame of the rotary tiller can be constructed from a relatively thin and lightweight plate material. It is not possible to ensure sufficient strength of the part to be pivoted to the bracket, and the distance between the left and right sides of the part is shortened, and the distance between the tractor side power take-off shaft and the work machine side input shaft located between them is An object of the present invention is to provide a mounting device for a rotor IJN rolling machine that can protect the main parts of the connected universal joint in close proximity and prevent damage to the joint due to collisions with lumps of dirt etc. that fly up during tillage. It is.

The structure of the present invention will be described with reference to an embodiment shown in the drawings. 1 is a riding type agricultural tractor, 2 is a transmission case thereof, and a power take-off shaft 3 is provided on the rear end surface of the transmission case 2. Projected and left and right opposing surfaces 4a
, 4a', a working machine mounting bracket 4 is provided to protrude across the power take-off shaft 3.

Further, reference numeral 5 denotes a rotary tilling machine, which is pivotally connected to the working machine mounting bracket 4 on the tractor side so as to be vertically movable, and can be raised and lowered by an elevating link mechanism 6 on the tractor side. freely supported.

In other words, is the rotary tiller 5 on its left and right opposing surfaces? The rotary case 9 of the rotary tilling section 8 is fixed to the frame 7 having a 7a' with bolts 10, and the rotary cover 11 covering the upper part of the rotary tilling section 8 is fixed to the frame 7, The frame 7 having left and right opposing parts 7a and 7a' is
It extends at the pivot joint groove of the work equipment mounting bracket 4, and its front portion is bulged inward in a constricted shape to form bulging molded portions 7b and 7b'.

And the bulging molded part 7b. Axis 1 towards the outside of 7b'
2.12' is integrally protruded by welding and is rotatably connected to the bracket 4 via the pivot shafts 12, 12'.

Furthermore, a tilling claw shaft 14 equipped with a plurality of tilling claws 13 is pivotally attached to the distal end of the rotary case 9, and an input shaft 15 is protruded from the base end surface of the tilling claw shaft 14. Inside, the input shaft 15 and the tilling claw shaft 14 are moved by a bevel gear.

The input shaft 15 protruding from the base end surface of the rotary case 9 is connected to the power take-off shaft 3 on the tractor side via a universal joint 16, and the universal joint 16 is connected to the left and right sides of the bracket 4. Surface 4a.

Left and right opposing surfaces of 4a' and frame 7? a, 7a', and its main part is the bulging molded part 7b of the frame 7.

It is located in the first space A defined by 7b'.

Reference numerals 17 and 11' denote reinforcing plates for the entire frame 7, and the reinforcing plates 17 and 17'
, 7b', and whose front part projects from the bulging molded parts 7b, 7b'.
2,12'.

18 and 18' are reinforcing plates for the bulging molded portions 7b and 7b'.

Reference numeral 19 denotes a joint cover. The front end of the joint cover 19 is pivotally supported by a pivot pin 20 between the left and right opposing surfaces 4a and 4a' of the bracket 4, and can be opened and closed vertically. It is free.

The joint cover 19 covers the universal joint 16 located between the bracket 4 and the frame 7.
Both rear sides of the frame 7 are supported on the left and right bulging molded parts 7b and 7b' of the frame 7 when it is laid down so as to cover the upper part of the frame 7.

Note that 21 is a lifting link mechanism 6 provided on the tractor 1.
22 is a tail wheel for adjusting the plowing depth of the rotary tillage machine 5, 23 is a vertical adjustment handle thereof, and 24 is a tilled soil clod scattering prevention plate.

In the tilted configuration, the rotary tiller 5 is towed by the tractor 1, and power is transmitted from the power take-off shaft 3 to the input shaft 15 via the universal joint 16 to rotate the tiller claw shaft 14. Plowing work is carried out by this.

During rotary tilling work, the impact received by the tiller claws 13 is concentrated at the pivot point between the work equipment mounting bracket 4 and the work equipment frame T, but the front part of the frame γ has an inward constriction. Since the bulging molded parts γb and 7b' are formed to bulge out, and the bulged molded parts 7b and 7b' are strongly reinforced by the reinforcing plates 17.17' and 18.18, the frame 7 Even if it is constructed from a thin, lightweight plate, its pivoting portion will not be damaged.

The main part of the universal joint 16 that connects the power take-off shaft 3 on the tractor 1 side and the input shaft 15 on the rotary tiller 5 side is located between the left and right opposing surfaces 7a and 787 of the frame γ. a bulging molded portion 7b protruding inward;
Since it is located in the extremely narrow space A between 7b', the main part of the universal joint 16 is located in the bulge molded part γb.
.

The bulging molded portion γb is closely protected by γb'.

Even if a lump of earth and stone larger than the space A between 167 is thrown up by the tiller claws 13 during tilling, the bulging molded portion 7b remains.

7b' can prevent collision with the main part of the universal joint 16.

In short, the present invention connects the frame γ of the rotary tiller to the tractor 1 by sandwiching the power extraction shaft 3 from the rotary cover 11 that covers the rotation path above the rotary tiller 8.
The front part of the frame 7 is bulged inward to form a bulging molded part 7b.

7b', and a reinforcing plate 17.17' is attached to the outside of the frame 1 to cover the bulging molded parts 7b and 7b', and the base end thereof is integrally fixed to the rotary case 9, The bulging molded parts γb and 7b' are positioned inside the bracket 4, and the bulging molded part 7b.

γb' is provided with pivots 12 and 12' that protrude outward;
Since the rotary tiller is configured to be rotatably connected to the tractor 1 via the pivot shafts 12 and 12', even if the frame γ of the rotary tiller 5 is made of a relatively thin and lightweight plate material, The parts to be pivoted to the work equipment mounting bracket 4 are bulging molded parts 7b and 7b' that bulge inward, and the bulged molded parts 7b and 7b' are formed by reinforcing plates 1γ.
, 11', it is not possible to ensure sufficient strength of the pivoted parts. Proximally protects the main part of the universal joint 16 that connects the power output shaft 3 on the 1 side and the input shaft 15 on the working machine 5 side, and prevents damage to the joint 16 due to collisions with lumps of dirt etc. that jump up during tilling. This has an extremely useful practical effect that can prevent such problems.

[Brief explanation of the drawing]

The drawings show an embodiment of the attachment device for a rotary tiller according to the present invention, in which FIG. 1 is a side view with some parts omitted, FIG. 2 is a plan view of the main parts, and FIG. The figure is a side view of the same as above. In the figure, 1 is a riding type agricultural tractor, 2 is its transmission case, 3 is a power mounting shaft, 4 is a work equipment mounting bracket,
4a and 4a' are the left and right opposing surfaces, 5 is the rotary tiller, 6 is the lifting link mechanism, 1 is the frame of the rotary tiller, γa and 7a' are the left and right opposing surfaces, 7b, 7
b' is a bulging molding part, 8 is a rotary cultivating part, 9 is a rotary case, 11 is a rotary cover, 12.12' is a pivot,
13 is a tilling claw, 14 is a tilling claw shaft, 15 is an input shaft on the rotary tilling machine side, 16 is a universal joint, 18
18' is a reinforcing plate, 19 is a joint cover, and 20 is its pivot pin.

Claims (1)

[Scope of Claim for Utility Model Registration] The frame 7 of the rotary tiller is
The rotary cover 11 that covers the upper part of the rotational trajectory of the frame 7 is extended from the rotary cover 11 that covers the upper part of the rotational trajectory of the frame 7 at the pivot joint 1 of the work equipment mounting bracket 4 that is protruded from the rear of the tractor 1 across the power take-off shaft 3. The bulging molded parts 7b and 7b' are bulged out to form the bulged molded parts 7b and 7b', and reinforcing plates 17 and 17' are attached to the outside of the frame 7 to cover the bulged molded parts 7b and 7b'. is integrally fixed to the rotary case 9, and the bulging molded portion 7b is formed. 7b/ is located inside the bracket 4, and the bulging molded portions 7b, 7b' are provided with pivot shafts 12, 12' that protrude outward, and the rotary tiller is connected via the pivot shafts 12, 12/. A mounting device for a rotary tiller, characterized in that it is configured to be pivotally connected to a tractor 1 in a freely rotatable manner.