JP2521905Y2 - Center drive type tillage device - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is a tilling device mounted on the rear of the fuselage such as a cultivator or tractor. The present invention relates to a so-called center drive type tilling device provided at a central position.

(Prior art) A center drive type tilling device is one in which a number of tilling blades are radially arranged on a rotating shaft protruding left and right from a transmission case. When the rotating shaft is in a horizontal state, the cultivating blade is cultivated. The cutting surface to be cut at both left and right outer ends becomes vertical, and such a tilling operation is performed at the time of work such as middle plowing. In addition, when the rotating shaft is in a forward descending state, the cutting surface of the ground to be cut at both left and right outer ends of the tilling blade is an inclined surface having a downward narrowing inward, and the cultivating groove has a V-shaped so-called V-shaped cut. This kind of tilling work is performed in the work to make a ridge.

Such switching to the tilling state suitable for the purpose of use is performed by changing the direction of the rotating shaft by changing the attachment of the support bracket holding the rotating shaft to the transmission case.

(Problem to be solved by the present invention) The present invention is to solve the problem that the axial direction of the rotating shaft that changes the tilling state can be changed by a simple operation.

(Means for Solving the Problems) In a center drive type tilling device in which a cultivating blade 3 is attached to rotating shafts 2 and 2 projecting from the transmission case 1 to the left and right sides, the rotation shaft 2 is moved in the axial direction of the transmission case 1. Support bracket 4 for supporting in a state of being inclined from a direction perpendicular to the
Is rotatably supported by the transmission case 1 and the rotating shaft 2
Stop members 5 and 6 are provided so as to regulate the rotation of the support bracket 4 at two positions, that is, a position (A) where the axial direction becomes a horizontal state and a position (B) where the axial direction becomes a forward descending state. With the direction change, the support bracket 4 is moved to the stop member 5,
It is configured such that the axis direction of the rotating shaft 2 is switched to the horizontal direction or the forward and downward direction by rotating between the six.

(Operation and Effect of the Invention) The support bracket 4 pivotally supported by the transmission case 1 rotates between the stop members 5 and 6 when the rotation direction of the rotary shaft 2 is switched between normal and reverse, and the axial direction of the rotary shaft 2 is changed. It becomes horizontal or goes down. For example, if the position of the stop member 5 is set so that the direction of the rotating shaft 2 is horizontal in a state where the rotating shaft 2 rotates forward, the rotating shaft 2 will be in a forward descending state if the rotating shaft 2 is rotated in the reverse direction. What is necessary is just to set the position of the stop member 6. In this case, if the rotating shaft 2 is rotated forward to perform medium tillage weeding, and if the rotating shaft 2 is rotated reversely, a V-shaped groove can be formed.

As described above, the axial direction of the rotating shaft 2 is changed to the horizontal state or the forward-downward state only by switching the rotating direction of the rotating shaft 2 in the normal or reverse direction, and the tilling state is set according to the working conditions.

(Example) Next, an example of the present invention will be described with reference to the drawings.

In this embodiment, the center drive type tillage device of the present invention is provided in a one wheel management machine. In this one-wheel control machine, an abutment 8 protrudes forward from a gear box 7 provided at the center of the body, and a prime mover 9 is mounted on the abutment 8.
Power is transmitted to the gear box 7 by belt transmission. 10 is a cover of the belt transmission.

A transmission case for traveling from the gear box 7 toward the front and lower side
11 is provided, and one traveling wheel 12 is mounted below the transmission case 11. A tilling transmission case 1 is provided rearward and downward from the gear box 7, and a tilling blade mounting cylinder 13 having a tilling blade 3 mounted on a rotating shaft 2 protruding left and right at a lower portion of the transmission case 1 is attached with a pin 14. ing.

Further, the frame 15 is moved rearward from the gear box 7.
The intermediate portion of the tilling transmission case 1 is fixed to the frame 15, and the cover 16 of the tilling blade 3 and the mounting rod 18 of the remaining tilling blade 17 are attached.

On the upper part of the gear box 7, a handlebar 19 expanded left and right toward the rear is mounted so as to be able to rotate back and forth and adjust the vertical height.

1 and 2 show the structure of the lower end portion of the tilling transmission case 1 in detail.

A lower end portion of the transmission case 1 is formed in an arc shape, and a power transmission portion for the rotating shafts 2 is provided at a central portion thereof. Inside the transmission case 1, a sprocket 20, which receives power from the upper gear case 7 by a chain, is held by a support bracket 4 described later by a bearing 21. The sprocket 20 has an internal tooth 22 formed at the center thereof, and meshes with a gear 23 formed at the inner end of the rotary shafts 2, 2 to transmit a rotational driving force to the rotary shaft 2.

The support bracket 4 that supports the rotating shafts 2 and 2 with the bearings 24 is shaped so as to hold the rotating shafts 2 and 2 at an angle of about 10 ° from a right angle to the transmission case 1, and a mounting portion to the transmission case 1. Is rotatably fitted to the boss portion 25 and is held by a retaining ring.

Also, a protruding portion 27 is formed on the outer periphery of the support bracket 4,
The projecting portion 27 comes into contact with stop members 5 and 6 formed of pins welded to the boss portion 25 of the transmission case 1 so as to prevent rotation.

When the rotating shaft 2 is rotated forward (counterclockwise in FIG. 2), the protruding portion 27 hits the front stop member 5 and is stopped from rotating. When it is turned in the reverse direction (clockwise in FIG. 2), the protruding portion 27 comes into contact with the stop member 6 on the rear side, and the rotation is stopped.

If the rotating shaft 2 is rotated forward to perform work with the one-wheel management machine configured as described above, the axial direction of the rotating shaft 2 becomes horizontal, and the plowing depth of each tilling blade 3 becomes the same. It is used for shallow plowing in the ditch and for weeding to remove weeds.
In addition, if the rotating shaft 2 is reversed, the axial direction of the rotating shaft 2 will be in a down state, and a V-shaped groove can be formed with the tilling blade.

[Brief description of the drawings]

1 shows an embodiment of the present invention. FIG. 1 is a partially enlarged sectional view, FIG. 2 is a partially enlarged side view, and FIG. 3 is an overall side view. 1 ... transmission-case 2 ... rotating shaft 3 ... tilling blade 4 ... support bracket 5, 6 ... stop member

Claims (1)

(57) [Scope of request for utility model registration] 1. A center drive type tilling device in which a cultivating blade 3 is attached to rotating shafts 2, 2 protruding from both sides of a transmission case 1 to the left and right sides.
The support bracket 4 is supported by the transmission case 1 so as to be rotatable while being tilted from a direction perpendicular to the direction, and the rotating shaft 2 is in a horizontal position (A) where the axial direction is in a horizontal state. Stop members 5 and 6 are provided to restrict the rotation of the support bracket 4 at two positions (B), and the support bracket 4 rotates between the stop members 5 and 6 as the driving direction of the rotating shaft 2 is switched. A center drive type tilling device, characterized in that the center direction of the tilling device is configured to move so that the axial direction of the rotating shaft 2 is switched in a horizontal direction or a forward and downward direction.