JPH0698602A - Tilling cover in rotary tiller - Google Patents

Abstract

PURPOSE:To provide a tilling cover of simple scheme capable of revolving according to the depth of plowing in conducting deep tilling or shallow tilling work such as substitute raking by a rotary tiller. CONSTITUTION:A tilling cover is divided into a front cover 10 and a rear cover 8, and the latter is designed to be revolvable back and forth around the support A provided above and behind the revolving center of the rotary tiller.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a tilling cover for covering the outer circumference of a rotary of a rotary tiller.

[0002]

2. Description of the Related Art Conventionally, there has been known a technique in which a tilling cover of a rotary tiller is provided so as to be rotatable forward and backward, and the technique involves rotating a left side plate portion and a right side plate portion fixed to both sides of the tilling cover. The shaft is extended to the shaft center side and loosely fitted around the tilling pawl shaft so as to be rotatable back and forth about the tilling pawl shaft.

[0003]

However, in the conventional structure of the tilling cover, the left side plate portion and the right side plate portion fixed to the tilling cover become large, so that the tilling cover becomes heavy, or the tilling claws are used. Since it is loosely fitted around the shaft, the structure around the cultivating shaft is complicated and assembly is difficult, resulting in high cost. Further, although the above structure can be applied to a side drive type rotary, it has a drawback that it is difficult to apply to a center drive type rotary.

[0004]

The problems to be solved by the present invention are as described above. Next, the means for solving the problems will be described. That is, the tillage cover that covers the upper and outer circumferences of the rotary is divided into a front tillage cover 10 and a rear tillage cover 8, and the rear tillage cover 8 is centered around a rotation fulcrum A provided rearward above the rotation center of the rotary. It is configured to be rotatable.

[0005]

The function of the present invention will be described. When the cultivating cover adjusting handle 9 is rotated from the upper limit position of the arm 12 to rotate the arm 12 downward, the rear cultivating cover 8 rotates rearward via the rod 20 as the arm 12 rotates downward, The arm 12 can be rotated until its lower end contacts the upper surface of the front tillage cover 10. Further, when the tilling cover adjusting handle 9 is rotated in the opposite direction from the lower limit position of the arm 12, as the arm 12 rotates upward, the tip of the screw adjusting rod 18 contacts the pin 19 via the rod 20. The rear tillage cover 8 rotates forward until it touches. Further, as the rear tillage cover 8 rotates in the front-back direction, the leveling plate 11 also rotates in the vertical direction.

[0006]

The problems to be solved and the means for solving the present invention are as described above. Next, the specific structure of the present invention will be described with reference to the accompanying drawings. 1 is an overall side view of a rotary tiller according to the present invention, FIG. 2 is a partial side view showing the operation of a rear tillage cover and a leveling plate, FIG. 3 is a plan view showing the structure of an arm, and FIG. 4 is an arm and a rear tiller cover. FIG. 5 is a front view showing the structure of FIG. 5, and FIG. 5 is an overall side view showing another embodiment.

The overall structure of the present invention will be described with reference to FIGS. The present invention relates to the structure of a cover that covers the outer circumference of a rotary of a rotary tiller attached to the rear of a tractor. In the rotary tiller X, the power from the PTO shaft of the tractor is transmitted to the input shaft 1 projecting forward from the bevel gear box 2, and the transmission shaft in the support pipe 16 projecting laterally from the bevel gear box 2,
The power is transmitted to the chain case 3 provided on the side part of the rotary tiller X, and the power is transmitted to the tiller claw shaft 4 (rotary) extending between the chain case 3 and the side plate on the other side. The plowing work is carried out by driving the plowing claws 4a, 4a ...

A top link mast 5 is projected upward from the bevel gear box 2 and the bevel gear box 2
Support plates 23, 23 are provided on both sides to support rods 6, 6.
The front end of the support rod 6 and the rear end of the support rod 6 and a gauge wheel 24.
24 is mounted, a plowing depth adjusting handle 7 is interposed between the supporting rod 6 and the top link mast 5, and by rotating the plowing depth adjusting handle 7, the supporting rod 6 is rotated. The working depth can be adjusted.

Support pipes 16 are projected from the bevel gear box 2 to the left and right, and as shown in FIG. 3, a stay is projected downward from a middle portion of the left and right support pipes 16 to pivotally support the front ends of the arms 12. A pair of fulcrums B
B is provided. A stay is projected on the middle part of the connecting pipe 17 connecting the middle parts of the arms 12 to pivotally support the lower end of the screw-adjustable rod 18 with a pin 19, and The top link mast 5 is pivotally supported at the upper end by a pin 5a at the rear, and the screw adjustable rod 18 is made expandable and contractable by rotating the tiller cover adjusting handle 9, and the rear tiller cover 8 described later is moved up and down. It is adjustable.

The left and right support pipes 16
16 A chain case 3 and side plates are provided at both ends, and a front tillage cover 10 is provided between the chain case 3 and the side plate upper part.
Is fixedly mounted, and a rear tillage cover 8 is connected to a rear side of the front tillage cover 10 through a rubber cover 15, and the rubber cover 15 is such that the rear tillage cover 8 is rotatable downward. The length is set so that the upper part is curved when the rear tillage cover 8 is at the upper position. Further, a fulcrum 8a is provided at the rear part of the rear tillage cover 8 so that the ground leveling plate 11 is pivotally supported so as to be vertically rotatable. It is supported, and the upper portion of the rod 13 is pivotally supported on the rear end fulcrum 12a of the arm 12.

As shown in FIG. 4, connecting plates 14 and 14 are fixed to both ends of the rear tillage cover 8, and pins are projected from the lower ends of the connecting plates 14 and 14 to provide pivot points A. The pivot point A is pivotally supported by the support plates 22 and 22 fixed to the chain case 3 and the side plate, and the rear tillage cover 8 is rotatable about the pivot points A and A in the front-rear direction. In addition, the rod 2 is provided in the middle of the arm 12.
0 The upper end is pivotally supported, its pivotal support point is D, and the rod 20
The lower end is pivotally supported on the upper portion of the rear tillage cover 8, and when the tiller cover adjusting handle 9 is rotated with the pivot point as C, the rear tillage cover 8 is rotated in the vertical direction.

That is, as shown in FIG. 2, when the cultivating cover adjusting handle 9 is rotated to rotate the arm 12 in the upward direction, the rear cultivating cover 8 is lifted upward through the rod 20 to rotate. Then, the leveling plate 11 is lifted upward by the rod 13 to enable deep plowing, and when the plowing cover adjusting handle 9 is rotated to rotate the arm 12 downward, the rear plowing cover 8 is lowered downward. It rotates and the soil cover is closed by the rubber cover 15 between the rear cultivating cover 8 and the front cultivating cover 10 and the soil is not scattered, and the leveling plate 11 is rotated downward by the rod 13 to enable shallow cultivating. It becomes. The upper limit stop position of rotation of the rear tillage cover 8 is the position where the screw rod tip 18a of the screw adjustable rod 18 abuts the pin 19, and the lower limit stop position of rotation of the rear tillage cover 8 is the arm. The lower end of 12 is in contact with the front tillage cover 10.

The rotation fulcrum A of the rear tilling cover 8 is provided between the center of the tilling claw shaft 4 and the rear tilling cover 8, but as shown in FIG. The rear cultivating cover 10 or the chain case 3 and the side plate may be provided with a rotation fulcrum A so as to project upward and rearward, and the rear cultivating cover 8 may be rotated rearward. Further, although the side drive type rotary tiller has been described above, the present invention is also applicable to a center drive type rotary tiller, in which case the chain case 3
Is arranged in the center, it is more advantageous to arrange the rotation fulcrum A above the rear tillage cover 8 as shown in FIG.

[0014]

Since the present invention is configured as described above, it has the following effects. That is, by dividing the tillage cover into the front and rear and providing the rotation fulcrum of the rear tillage cover at a position other than the center of the tillage claw shaft, the rear tillage cover and the periphery of the rotation fulcrum portion are easily assembled, and the side drive rotary is installed. Can be easily applied to the center drive rotary. Further, since the front tillage cover is of a fixed type, it is possible to reliably prevent scattering of mud from the front during substituting work.

[Brief description of drawings]

FIG. 1 is an overall side view of a rotary tiller of the present invention.

FIG. 2 is a partial side view showing the operation of the rear tillage cover and the ground leveling plate.

FIG. 3 is a plan view showing a structure of an arm.

FIG. 4 is a front view showing a structure of an arm and a rear tillage cover.

FIG. 5 is an overall side view showing another embodiment.

[Explanation of symbols]

 X Rotary tiller A Rotating fulcrum 8 Rear tiller cover 9 tiller cover adjustment handle 10 Front tiller cover 12 Arm 14 Connecting plate

Claims (1)

[Claims] 1. A tillage cover for covering the upper and outer circumferences of a rotary is divided into a front tillage cover 10 and a rear tillage cover 8, and the rear tillage cover 8 is centered around a rotation fulcrum A provided rearward of the rotary center of the rotary. A cultivating cover for a rotary cultivating device, wherein the cultivating cover is configured to be rotatable in the front-back direction.