JPH0444001Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a main beam assembly structure for a rotary device.

(b) Conventional technology Conventionally, a rotary device is connected to the rear end hitch of a tractor via a case support so as to be able to move up and down.
The tip of the lift arm, which protrudes from the rear of the tractor so that it can move up and down, is connected to the case support via a lift link, and the lift arm allows the rotary device to move up and down.

Further, the rotary device includes a rotary section that performs plowing work, and a rear cover that is located behind the rotary section and that levels the plowed surface.

(c) Problems to be solved by the invention However, in the above case, the vertical movement trajectory of the rotary device is a rotation trajectory centered on the tip of the case support connected to the rear end hitch of the tractor. When adjusting the plowing depth of the rotary part by raising and lowering the rotary part, it was also necessary to adjust the rear cover, which made the work cumbersome.

(d) Means for solving the problem In this invention, the front end of the case support protruding forward from the gear case is connected to the rear end hitch of the tractor so that it can move up and down, and can also move up and down from the rear of the tractor. In a rotary device in which a case support is interlocked and connected to the end of a lift arm that protrudes from the gear case, the outer rotating cylinder is loosely fitted into the inner rotating cylinder that is orthogonally protruded from the left and right sides of the gear case. The base ends of the left and right main beams that support the rotary part are connected to the outer end of the outer cylinder, and left and right link flanges each having a front and rear projection are fixed to the peripheral surface of each rotating outer cylinder. It is an object of the present invention to provide a main beam assembly structure for a rotary device in which the rear end of a rotary link whose front end is connected to a tractor rear end hitch is connected between the tips of the protrusions.

(E) Function/Effect When raising and lowering the rotary device, it is sufficient to move the lift arm up and down.In this case, the gear case, which is interlocked and connected to the lift arm via the case support, is attached to the rear end of the tractor. The rotary part, which is supported by the left and right main beams, moves up and down around the front end of the case support connected to the hitch. The tip of the front protrusion of the link flange, which is loosely fitted into the protruding inner rotating cylinder and is fixed to each outer rotating cylinder, is connected to the rear end hitch of the tractor via the rotating link. It is lifted and lowered in the vertical direction while maintaining a constant horizontal state near the surface.

Furthermore, the work of assembling the left and right main beams can be done by loosely fitting the rotating outer cylinder into the rotating inner cylinder and supporting the rear end of the rotating link between the tips of the front projections of the opposing link flanges. The left and right main beams can be easily centered and assembled, and the main beams can be rotated smoothly and reliably, so that the rotary device can be adjusted up and down accurately.

(F) Example The example of the present invention will be described in detail based on the drawings.
A shown in FIG. 1 is a rotary device, and the rotary device A has a link mechanism 2 interposed between it and a rear end hitch 1 of a tractor so that it can move up and down.

In the figure, 3 is a rotary part, 4 is a rear cover 5 is a left main beam, 6 is a drive shaft, 7 is a left link flange, 8 is a case support, and 9 is a plowing depth adjustment part.

Reference numeral 10 shown in FIG. 2 is a gear case, and rotating inner cylinders 11,
11 is provided protrudingly, and a rotating outer cylinder 5 is provided on each inner cylinder 11, 11.
The base ends of the left and right main beams 5, 5 are connected to the outer cylinders 5a, 5a by loosely fitting the left and right main beams 5, 5a.

A case support 8 is provided to protrude forward from the front side of the gear case 10.
The tip end is connected to the tractor rear end hitch 1 by a pivot 8a so as to be vertically movable.

Further, the left link flange 7 described above is the second link flange 7.
As shown in Figures 3 and 3, the base end is fixed to the left rotating outer cylinder 5a, and the front and rear protrusions 7 extend upwardly and backwardly.
A and 7b are provided, and the right link flange 7, which is similarly formed symmetrically, is fixed to the right rotation outer cylinder 5a, and the tips of the front protrusions 7a and 7a are brought close to each other in a facing state. The rear end of the rotary link 12 is pivoted 13 between the tips of the front projections 7a, 7a.

As shown in FIG.
b, left and right spacers 13c, 13c, and stepped small diameter portions 13b', 13b' are provided on the left and right sides of the rotating link fulcrum pipe 13b, and the same stepped small diameter portions 13b',
The rear end of the rotation link 12 is pivotally supported on 13b'.

The front ends of left and right rotary frames 14, 14 are connected to each rear protrusion 7b, 7b, and
4 and the protrusions 7b, 7b support the plowing depth adjustment part 9 in an upright manner.

In addition, the link mechanism 2 includes left and right lift arms 15, 15 that protrude from the rear of the tractor so as to be movable up and down.
Left and right lift arms 16, 16 are interposed between the tip and the center of the left and right sides of the case support 8, respectively.
The rotary device A is configured to move up and down in conjunction with the vertical movement of the left and right lift arms 15, 15, and the front end of the rotation link 12 is connected to the tractor rear end hitch 1 by a pivot 17, so that the rotary device A can move up and down at the same time. dynamic link 12
This allows the rotary device A to move up and down in a substantially horizontal state near the tilled surface.

That is, the rotation bases of the left and right link flanges 7, 7 supporting the rear end of the rotation link 12 are the left and right rotation outer cylinders 5a, 5a, and the case connected to the left and right lift arms 15, 15. The pivoting base of the support 8 is the left-right pivoting inner cylinder 11, and since the inner and outer barrels 11 and 5a are loosely fitted into each other, for example, the left and right lift arms 15,
15, the case support 8 rotates upward, but the rotary part 3 and rear cover 4 supported by the left and right link flanges 7, 7, and the left and right main beams 5, 5 maintain their original horizontal state due to their own weight. When the left and right lift arms 15, 15 rise vertically upward and rotate over a certain angle, the rotary part 3
etc., are rotated in the direction of the tractor while remaining horizontal.

In such a configuration, the gist of the present invention lies in the assembly structure of the main beams 5, 5, which have their base ends connected to the gear case 10, as described above.
Since it is only necessary to loosely fit the left and right rotary inner cylinders 11, 11 protruding from the left and right sides via the left and right rotary outer cylinders 5a, 5a, it is easy to assemble and center the left and right main beams 5, 5. The beams 5, 5 can be rotated easily, and the rotary device A can be rotated easily.
The vertical adjustment can be performed accurately.

Moreover, the link flanges 7, 7 are fixed to the left and right rotating outer cylinders 5a, 5a, respectively, and the front protrusions 7a, 7
In order to support the rear end of the rotary link 12 between the tips of the link flanges 7, 7
The structure of can be simplified.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view of a rotary device having a main beam assembly structure according to the present invention. Second
The figure is a partially cutaway rear view of the main part. FIG. 3 is an enlarged side sectional view of the main part. FIG. 4 is an enlarged sectional view of the pivoting link. A... Rotary device, 1... Tractor rear end hitch, 5... Main beam, 5a... Rotating outer cylinder, 7
...Link flange, 8...Case support, 1
0... Gear case, 11... Rotating inner cylinder, 15...
lift arm.

Claims (1)

[Scope of utility model registration request] The front end of a case support 8 protruding forward from the gear case 10 is connected to the rear end hitch 1 of the tractor so as to be movable up and down, and a case support is attached to the tip of a lift arm 15 which is protruded from the rear of the tractor so as to be movable up and down. In the rotary device, the rotary outer cylinders 5a, 5a are loosely fitted into the rotary inner cylinders 11, 11, which protrude perpendicularly from the left and right side surfaces of the gear case 10, respectively. ，
The base ends of the left and right main beams 5, 5 that support the rotary part 3 are connected to the outer ends of the outer cylinders 5a, and front and rear protrusions 7a, 7b are provided on the peripheral surfaces of the rotary outer cylinders 5a, 5a, respectively.
Fixing the left and right link flanges 7, 7 having
Between the tips of the front projections 7a and 7b of both flanges 7, 7,
This main beam assembly structure for a rotary device is formed by connecting the rear end of a rotation link 12 whose front end is connected to a tractor rear end hitch 1.