JP2508871Y2 - Rear cover device for rotary cultivator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a rear cover device for a rotary cultivator that raises and lowers a rear cover.

(B) Conventional technology Conventionally, as a rear cover up / down adjusting device for a rotary cultivator, a main cover is supported so as to rotate back and forth around a rotary shaft, and a rear cover rotatably attached to a rear portion of the main cover has already been used. Are known.

(C) Problems to be Solved by the Invention The known rear cover vertical adjustment device requires not only the rear cover but also the main cover to be pivotally adjusted, and therefore requires a strong support structure and a large amount of power.

Therefore, on the upper surface of the main cover, a plurality of support brackets that form a pair in the front-rear direction and that pivotally support the guide rollers are provided at intervals in the lateral direction, and an arc-shaped rail frame can be moved back and forth on the guide rollers. And connect the rear ends of these rail frames with a horizontal frame, and rotatably attach the upper part of the rear cover to the horizontal frame.
When the rear cover is supported by the adjuster so as to be vertically adjustable, the above-mentioned problems can be solved.

However, if the rod support bracket for the suspension rod of the rear cover, the rail frame and the horizontal frame are welded separately, the strength is weak and the structure becomes complicated.

(D) Means for solving the problem On the upper surface of the main cover, a pair of front and rear and rocking bodies are formed.
A plurality of brackets that pivotally support the 17 are provided laterally at intervals, and an arcuate rail frame is fitted to the rocking body so as to be movable back and forth, and a rear cover is pivoted at the rear end of the rail frame. The above-mentioned problems were solved by suspending as much as possible, arranging the rod support bracket for the suspension rod of the rear cover on the same line as the rail frame, and welding and fixing together with the rail frame and the horizontal frame connecting the rear ends thereof.

(E) Action When carrying out rotary tillage work, the rear cover is moved downward relative to the fixed main cover during shallow tillage and upward during deep tillage for leveling and leveling after tilling.

At that time, each rail frame is guided by the rocking body on the main cover to move back and forth, and since the rear cover is pivotally supported by the rear cover bracket integrated with the pipe connecting the rail frames, it is possible to move the rail frame rearward. The rear cover goes down, and moving the rail frame forward raises the rear cover.

In addition, the rod support bracket welded across the horizontal frame connecting the left and right rail frames to the upper surface of the rail frame firmly connects the rail frame and the horizontal frame, and the stability of the rod support bracket itself is improved. Securely support the rear cover.

When the suspension rod is extended, the rear cover rotates with the upper horizontal frame as a fulcrum to close the angle, and when the suspension rod is contracted, the angle is opened to facilitate the escape of soil.

(F) Embodiment An embodiment of the present invention will be described with reference to the drawings. A rotary tiller is suspended at the rear part of a mission case of a tractor via a lower link, a top link bracket and a top link.

On the one hand, the power of the tractor drives the rear wheels to move forward, while on the other hand, the tractor powers from the PTO shaft to the rotary gear case.
7, Through the chain case 9, the tiller 12 is driven to cultivate the soil.

The cultivating part 12 has its upper surface covered with a main cover 11 and a rear cover 21 and its side surfaces covered with a side cover 10 to prevent scattering of soil and also to perform crushing and leveling operations.

A tool bar 14 is provided from the rear of the gear case 7 to the rear, and various attachments are attached to the tip of the tool bar 14 to carry out auxiliary work for rotary tillage.

A tool bar vertical adjustment screw is pivotally supported between the top mast 8 and the tool bar 14, and the relative position of the tiller 12 and the attachment can be changed by turning the handle on the top.

The main cover 11 and the U-shaped rail frame 19 that supports the rear cover 21 are separate bodies, and a guide roller 17 that is paired on the upper surface of the main cover 11 in the front-rear direction and that includes a bearing is provided on the horizontal axis 17a. A plurality of brackets 16 supporting the shaft are provided laterally at intervals.

The guide roller 17 is fitted with a rail frame 19 guided by the guide roller 17 to move back and forth in an arc, and the upper portion of the rear cover 21 is rotated by a horizontal frame composed of a pipe 20 connecting the rear ends of these rail frames 19. Installed as possible.

An electric cylinder 22 and a ram 23 are interposed between a bracket 28 projecting from a pipe 20 connecting the top mast 8 at the center of the rotary upper part and the rail frame 19 below, so that the ram
When the length of 23 is extended, the rail frame 19 moves rearward to lower the rear cover 21, and when the rail frame 19 is contracted, the rail frame 19 moves forward to raise the rear cover 21.

In addition, two rod supporting brackets 27 facing each other across the upper surface of the rail frame 19 and the pipes connecting the left and right rail frames 19 are welded to each other and hung between the rod support brackets 27 provided on the collinear rear cover. The rod 26 is arranged so that it can expand and contract.

When the suspension rod 26 is extended, the rear cover 21 is
Rotating with a as a fulcrum, the angle is closed to increase the resistance of the soil, and when the suspension rod 26 is contracted, the angle is opened to facilitate the escape of the soil.

A rib 21 ′ is welded to the rear surface of the rear cover 21 on the same line as the rail frame 19 so as to increase the rigidity of the rear cover 21 and also serve as a fulcrum of the suspension rod 26 to directly receive the resistance of the soil, so that the rail frame 19, the rod support bracket 27 By arranging the suspension rod 26 and the rib 21 'in a straight line, not only the strength and durability around the rail frame 19 and the bearing for guiding the rail frame 19 are excellent, but also the appearance is simple.

The upper ends of the ribs 21 'provided on the rear surface of the rear cover 21 come into contact with the rear ends of the rod support brackets 27 when the rear cover 21 is lifted up to the upper limit.

Furthermore, an L-shaped angle plate 2 is provided below the pipe 20.
0'is welded and fixed to the same length as the pipe 20 and the rear cover 21, and its rear end is extended rearward from the rotation fulcrum of the rear cover 21, thereby increasing the rigidity of the pipe 20 and the angle plate 20 'and the rubber plate. The watertightness of the pivot 20 of the pipe 20 and the rear cover 21 prevents the splashing of muddy water from the gap. Reference numeral 31 is a guide roller supported by the vertical axis 32.

(G) Effect of the Invention According to the present invention, a plurality of brackets 16 forming a pair in the front and rear direction and pivotally supporting the rocking body 17 are provided on the upper surface of the main cover 11 in a laterally spaced manner. The arc-shaped rail frame 19 is fitted to the rail so that it can move back and forth,
A rear cover 21 is rotatably suspended at a rear end of the rear cover 19, a rod support bracket 27 for a suspension rod 26 of the rear cover 21 is arranged on the same line as the rail frame 19, and the rail frame 19 and a horizontal frame connecting the rear ends thereof are arranged. By welding and fixing, the joint strength of the rod support bracket 27, the horizontal frame, and the rail frame 19 was strengthened.

In addition, since the main cover 11 is fixed and only the rear cover 21 is moved back and forth by the guide rollers 17, there is no need for a strong support structure, and no large power is required for the movement.

[Brief description of drawings]

1 is a side view of a rotary tiller, FIG. 2 is a perspective view of a rotary tiller, FIG. 3 is a side view of a rear cover mounting portion, and FIG.
(A) and (b) are sectional views of the rail frame, and FIG. 5 is a perspective view of the cover. 11 is a main cover, 12 is a tilling part, 17 is a guide roller, 19
Is a rail frame, 20 is a pipe, 21 is a rear cover, 22 is an electric cylinder, 23 is a ram, 26 is a suspension rod, 27 is a rod support bracket, and 28 is a bracket.

Claims (2)

(57) [Scope of utility model registration request] 1. A plurality of brackets 16 are formed on the upper surface of a main cover 11 so as to form a pair in the front-rear direction and pivotally support an oscillating body 17. The brackets 16 are arranged in an arc shape on the oscillating body 17. A rail frame 19 is fitted so as to be movable back and forth, a rear cover 21 is rotatably suspended at the rear end of the rail frame 19, and a rod support bracket 27 for a suspension rod 26 of the rear cover 21 is collinear with the rail frame 19. Arrange, rail frame 19
And a rear cover device for a rotary cultivator, wherein the rear cover device is welded and fixed together with a horizontal frame that connects the rear ends thereof. 2. The rear cover device for a rotary cultivator according to claim 1, wherein a reinforcing rib is provided on a rear surface of the rear cover 21 corresponding to the rail frame 19, and the rod support bracket is configured as a stopper with which the rib abuts.