JPH02291202A - Tillage depth adjustment device for rotary tillage equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a tillage depth adjusting device for a rotary tiller.

[Prior Art] Conventionally, in a so-called rotary power bar type rotary tilling device in which the length of the cover is adjusted and changed by swinging the tilling cover covering the tilling part back and forth around the axis of the tilling shaft, the tilling cover is conventionally shown in FIG. As shown, instruction marks b are placed on one side of the top surface of the tilling cover a at predetermined intervals along the direction of rotation of the cover, and arrows d are placed on the opposite side plate C on the fixed side to adjust the tilling depth. The rotary tillage cover a was designed to rotate back and forth depending on the situation. When adjusting the plowing depth to be shallow, such as during plowing work, the lift arm is moved upward to lift the entire work machine, and the tillage cover a is moved to the "shallow" side (to the rear), conversely, for deep plowing. In this case, the rotary tiller is lowered and the tiller bar a is moved upward to adjust the rotation so that the rotary tiller J bar a is always in the proper position.

[Problems to be Solved by the Invention] By the way, in the conventional rotary tilling device connected to a tractor via a three-point link, the characteristics of the three-point link, which is a hanging link, are: 1E
The further the rotary tiller is moved, the more the rotary tiller becomes tilted upwards, and this phenomenon also occurred when the Togo tractor sank in a wet field. In this case, the rotary tilling device is held up by the ground, causing the rotary body to move, and as a result, even if the tilling depth is constant, the rear side of the tilling cover rises by -1, which causes the tilling cover to move upwards. There was a problem in that the angle between the rear lower end and the ground contact surface changed, which affected leveling performance. [Means for solving the problem] This invention was proposed in view of the above-mentioned problems, and the following measures were taken. That is, a rotary tiller 12 is connected to the rear of the tractor 1 via a three-point linkage mechanism 9.
The rotary tiller 12 is moved up and down by connecting the lift arms 6, 6 and rotating the lift arms 6, 6.
A tilling cover 20.21 that covers the tilling section is configured to be able to swing back and forth around the axis of the tilling shaft 15, and a display section 23 on the rotary tilling device 12 side displays the amount of back and forth movement of the tilling cover 20.21. A display section 26 for displaying the amount of rotation of the lift arm 6 is also provided on the lift 1-arm 6 side, and the display on both display sections 23 and 26 is such that the front and back posture of the mouth-tari tilling device 12 remains unchanged. A tilling depth adjusting device for a rotary tilling device is characterized in that the tilling depth adjusting device is provided at corresponding positions. [Function and Effect] After adjusting the plowing depth, the operator moves the tilling cover 20 back and forth so that the position of the instruction mark or mark indicating the current position of the lift arms 6, 6 matches the display mark on the rotary side display section. direction, and fix the tilling cover 20 when the marks or markings on both display parts match.

To adjust the rotation of the tilling cover 20, the tilling cover is moved by operating a handle or the like while visually checking the display mark on the lift arm 6 side and the mark on the tilling cover 20 side, so the adjustment work is easy and easy to handle. becomes easier. Moreover, since the working posture of the rotary after adjustment is kept constant, the angle of inclination of the ground-contacting part of the tilling cover 20 with respect to the ground becomes constant, and the soil surface can be well leveled. [Example] Hereinafter, an example of the present invention will be described based on the drawings. First, to explain the configuration, 1 is a tractor with front wheels 2, 2
Equipped with rear transport 3 and 3, engine 4 is mounted on the front of the fuselage,
Lift arms 6, 6 are pivotally supported on both left and right sides of the hydraulic cylinder case 5 at the rear of the machine. 7, 7 is a lower link, 8 is a top link, and these constitute a three-point link mechanism 9. 10.10 is a lift rond, which connects lift arms 6, 6 and lower links 7, 7. The rotary tiller l2, which is connected to the rear part of the three-point link mechanism 9 so as to be able to rise and fall freely, has an input shaft 13, an input shaft 1
3, a gear case 14 that rotatably supports the tilling shaft 15, a chain case 16 and a side plate 17 that support both ends of the tilling shaft 15,
It consists of a main cover 20 that covers the upper and rear parts of the tilling section, a rear cover 21, etc., and the rear cover 21 is pivotably attached to the rear end of the main cover 20, and these tilling covers 20, 2
1 can be integrally rotated around the axis of the tilling shaft 15 within a predetermined range. A mark 23 on the upper surface of one side of the main cover 20 indicates the appropriate position of the main cover 20 according to the plowing depth.
is pasted on the side plate 17, and an arrow 24 is pasted on the side plate 17. On the other hand, a mark 26 is also pasted on the pivot base on the side of the lift arms 6, 6, and an arrow 27 is pasted on the opposing hydraulic cylinder case 5. The letters or numbers written on both display marks are determined to correspond to each other, so that no matter where the lift arms 6, 6 are located, the letters or numbers at that position match the letters or numbers on the main cover 20 side. By rotating the main cover 20 back and forth, the posture of the main cover 20, in other words, can be changed.
The angle of the rear cover 21 with respect to the ground plane is always constant. In addition, the reference numeral 30 in the figure is an adjustment handle used to move the main cover 20t back and forth, and 31 is a plowing depth adjustment handle. In this embodiment, the display section is configured by pasting a mark, but it may also be configured so that a mark is attached to the main cover 20 and the pivoting bases of the lift arms 6, 6.

[Brief explanation of drawings]

The drawings show an embodiment of the invention, in which Fig. 1 is an overall side view, Fig. 2 is a perspective view of main parts, Fig. 3 is a rear view, Fig. 4 is a plan view, and Fig. 5 is a plan view. FIG. 2 is a perspective view of a conventional device. 6, 6 23, 26 Symbol explanation Tractor lift arm 3-point linkage mechanism Rotary tiller display mark

Claims (1)

[Claims] 1) A rotary tiller 12 is connected to the rear part of the tractor 1 via a three-point linkage mechanism 9, and the lift arms 6, 6
A tilling cover 20 that covers the tilling part in a device that moves the rotary tilling device 12 up and down by rotating the tiller.
21 is configured to be able to swing back and forth around the axis of the tilling shaft 15, and a tilling cover 2 is provided on the rotary tilling device 12 side.
A display section 23 is provided to display the amount of longitudinal movement of the lift arm 6, and a display section 26 is provided on the lift arm 6 side to display the amount of rotation of the lift arm 6. A tillage depth adjustment device for a rotary tillage device, characterized in that the tillage depth adjustment device for a rotary tillage device is provided in such a manner that the front and back postures of the rotary tillers 12 remain unchanged.