JP2000316312A - Tillage depth controller for rotary tiller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the interference of a rotary tiller with a tractor when lifting the rotary tiller. SOLUTION: A tillage depth-regulating screw rod 18 for regulating the depth to be tilled is freely rotatably supported at the upper end part of a mast 9 of a rotary tiller 1 in a slant state so that the front side may be positioned at the upper part and the rear side may be positioned at the lower side, and a handle 24 bent in an L-shape is attached to the upper end part at the front side of the tillage depth-regulating screw rod 18 so that the position may be regulated upper and lower. When changing the tillage depth, the tillage depth can easily be regulated by moving the grip part 24a of the handle 24 upward. Under the tillage operation, the grip part 24a of the handle 24 is moved downward, and positioned at the lower part at the rear side from the upper end part of the tillage depth-regulating screw rod 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a tillage depth adjusting device for a rotary tillage device.

[0002]

2. Description of the Related Art A conventional tillage depth adjusting device of a rotary tillage device rotates an adjusting screw rod for vertically adjusting a gauge wheel on an upper end portion of a mast in an inclined state such that a front side is located upward and a rear side is located downward. The L-shaped bent handle is fixedly attached to the upper end of the tillage adjusting screw bar, and the handle of the handle protrudes forward from the upper end of the tillage adjusting screw bar. Configuration.

[0003]

In the conventional apparatus, an L-shaped bent handle is fixedly attached to the upper end of the tillage adjusting screw bar, and the handle is gripped from the upper end of the adjusting screw bar. Since the part protrudes forward, raising the rotary tiller to the highest position may interfere with the tractor cabin, open the window at the rear of the cabin, and carefully There is a problem that it is necessary to ascend and the ascending operation is troublesome.

Therefore, the present invention is to solve such a problem.

[0005]

Means for Solving the Problems The invention for solving such a technical problem is based on the mast 9 of the rotary tilling device 1.
At the upper end of the cultivation depth adjusting screw rod 18 for vertically adjusting the gauge wheel 15 is rotatably supported in an inclined state in which the front side is positioned upward and the rear side is positioned downward. The base of the handle 24 bent into an L shape is attached to the portion, and a large grip portion 24a is formed at the tip of the handle 24, and the grip portion 24a is connected to the upper end of the screw rod 18 for adjusting the plowing depth. From the upper end of the tillage adjusting screw rod 18 to the rear side, and a tillable depth adjusting device of a rotary tillage device.

[0006]

When the plowing depth of the rotary tillage device 1 is adjusted, for example, as shown by a solid line in FIG.
The gauge wheel 15 can be easily adjusted up and down by moving the grip portion 24a of No. 4 to the front side and operating the grip portion 24a from the tractor. During the tillage operation, for example, as shown by the phantom line in FIG. 2, the grip portion 24 a of the handle 24 is moved to the rear side, and is positioned behind the front end of the tillage depth adjusting screw rod 18.

[0007] Accordingly, the gripping portion 24a of the handle 24 is supported in a hanging state on the rear side with respect to the front end of the tillage adjusting screw rod 18, and the rotation of the tillage adjusting screw rod 18 is regulated. Can be maintained as it is, and even if the rotary tiller 1 is raised, it is possible to prevent the grip portion 24a of the handle 24 from interfering with the tractor cabin.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the rotary tilling apparatus 1 includes a transmission case 2 to which power is transmitted from a tractor body, left and right beams 3 and 3 extending from the transmission case 2 to the left and right sides, and ends of the left beam 3. Transmission case 4 connected to the lower part, a side plate 5 connected to the end of the right beam 3, a tilling shaft 6, which is mounted on the lower ends of the side transmission case 2 and the side plate 5, a tilling claw Tilling device 8 consisting of 7 and transmission case 2
, A main cover 10 covering the upper part of the tilling device 8, a rear cover 11 covering the rear part of the tilling device 8, a pressing device 12 for the rear cover 11, and a left / right connecting plate 13 of the transmission case 2. , 13, a rear hitch 14 pivotally supported vertically, a gauge wheel 15 attached to the rear hitch 14, and a rear hitch 14.
And a screw-type tillage depth adjusting device 16 that adjusts the height up and down.

Next, the plowing depth adjusting device 16 will be described with reference to FIG. At the upper end of the mast 9, the left and right shaft portions of the top body 17 are pivotally supported, and a tillage depth adjusting screw rod 18 is inserted into the hole of the top body 17 and attached to the tillage depth adjusting screw rod 18 with a pin. The upper and lower stoppers 19, 19 are supported on the upper and lower surfaces of the frame body 17 in contact with each other, and the tillage depth adjusting screw rod 18 is rotatably supported at a predetermined position.

The rear hitch 14 has a cultivation depth adjusting cylinder 2.
0 is pivotally supported by a pin, and the screw portion of the tillage depth adjusting screw rod 18 is screwed into the screw portion of the tillage depth adjusting cylinder 20 so that the front side of the tillage depth adjusting screw bar 18 is positioned upward. It is supported in an inclined state so that the side is located below. Till depth adjusting screw rod 1
8, a support bar 21 extends in a direction intersecting the longitudinal direction, and a handle support plate 22 formed of a U-shaped cross-sectional leaf spring is provided on the base side of the support bar 21. An L-shaped bent handle 24 is attached to the tip of the support rod 21 and the handle support plate 22 by a support pin 23.
The base of the handle 24 is rotatably supported by a pin, and a large grip portion 24a is formed at the tip of the handle 24.

When the handle is adjusted, as shown by the solid line in FIG. 2, when the handle 24 is rotated to the front and the grip portion 24a is positioned to the front, the handle 24 is moved by the spring force of the handle support plate 22. The cultivating depth adjusting screw rod 18 is rotated forward or backward by operating the handle 24, and the cultivating depth adjusting cylinder 20 is expanded and contracted, and the rear hitch 14 is adjusted downward to adjust the cultivating depth.

During operation, the handle 24 is rotated rearward with respect to the tillage depth adjusting screw rod 18 as indicated by a virtual line,
The grip portion 24a is located behind the front end of the tillage adjusting screw rod 18. Therefore, the gripping portion 24a of the handle 24 is in a hanging state with respect to the till depth adjusting screw rod 18, the rotation of the till depth adjusting screw rod 18 is restricted, and the till depth adjusting state of the rear hitch 14 can be maintained as it is. Even if the rotary tilling apparatus 1 is raised, it is possible to prevent a problem that the handle 24 interferes with a cabin (not shown) of the tractor.

A top 17 is provided at the upper end of the mast 9.
The left and right shafts are pivotally supported, and the till depth adjusting screw rod 18 is inserted into the hole of the top body 17, and is regulated by the upper and lower stoppers 19, 19 so that the till depth adjusting screw rod 18 is fixed at a predetermined position. In order to rotatably support, as shown in FIG.
According to 9 and 19, it is good also as a structure which supports the upper end side of the tillage adjustment screw rod 18.

With such a configuration, during operation, the handle 24 is attached to the till depth adjusting screw rod 18 as indicated by a virtual line.
When the grip portion 24a of the rotary tilling device 1 is in a hanging state, the grip portion 24a is located between the left and right masts 9, 9, and
Can be prevented from interfering with the cabin (not shown) of the handle 24, and the grip 24a of the handle 24 is located between the left and right masts 9, 9.
The rotation of the screw rod 18 for adjusting the working depth is prevented, and the gauge wheel 1
5 can be reliably maintained.

Next, the embodiment shown in FIG. 4 will be described. An upper end stopper 2 is provided at the upper end of the tillage adjusting screw rod 18.
5, the base of the handle 24 is attached between the upper stopper 19 and the upper end stopper 25 of the cultivation depth adjusting screw rod 18 so as to be movable and integrally rotate with the cultivation depth adjusting screw rod 18. A compression spring 26 is interposed between the upper stopper 19 and the upper stopper 19 to urge the handle 24 to move forward. The handle 24 has a locking recess 2
8 and a locking pin 27 is provided on the mast 9 side. When the handle 24 is moved rearward, the locking recess 28 and the locking pin 27 are engaged, and the handle 24 is moved rearward. It is a configuration that can be locked.

When adjusting the working depth, the handle 24
When the locking concave portion 28 of the mast 9 is released from the locking pin 27 on the mast 9 side, the handle 24 moves upward and forward as indicated by the imaginary line by the compression spring 26, and the driver on the tractor grips the handle 24. The holding portion 24a is grasped, and the tillage depth adjusting screw rod 18 is rotated to adjust the gauge wheel 15 up and down.

During the tilling operation, the handle 24 is moved rearward against the compression spring 26, and the handle 24 is rotated around the tillage depth adjusting screw rod 18, so that the locking recess 28 and the locking pin 27, the rotation of the tillage adjusting screw rod 18 is prevented while the handle 24 is moved rearward,
The same effects as those of the above embodiment can be obtained. Next,
Referring to FIG.

At the rear of the rear cover 11, a sheath 29 for embedding the waste on the surface of the cultivated soil is provided over the entire width, and at the rear of the sheath 29, a roller 30 for leveling the soil surface on which the waste is embedded is provided over the entire width. ing. The roller 30 includes a roller bracket 30a, a roller 3
Roller supports 30b, 30 supporting both left and right sides
b, Roller bracket 30a and roller support 30
The pressure spring 30c is provided between the pressure springs 30b and 30b.

Thus, the tilling device 8 of the rotary tilling device 1 is tilled, and the swarf on the cultivated soil surface is buried by the sheath 29, and is crushed and leveled by the following roller 30, so that a clean cultivated soil surface can be formed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a rotary tilling device.

FIG. 2 is a side view of a main part.

FIG. 3 is a side view of a main part.

FIG. 4 is a side view of a main part.

FIG. 5 is a side view.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Rotary tilling device, 2 ... Transmission case, 3 ... Left and right beams, 4 ... Side transmission case, 5 ... Side plate, 6
... tillage shaft, 7 ... tillage nail, 8 ... tillage device, 9 ... mast, 1
0: Main cover, 11: Rear cover, 12: Pressing device,
13 ... left / right connecting plate, 14 ... rear hitch, 15 ... gauge wheel, 16 ... tillage depth adjusting device, 17 ... frame body, 18 ...
Till depth adjusting screw rod, 19 ... upper / lower stopper, 20 ... depth adjustment cylinder, 21 ... support rod, 22 ... handle support plate, 23 ... support pin, 24 ... handle, 24a ... gripping part, 25 ... upper end stopper , 26 ... compression spring, 27 ... locking pin, 2
8: locking recess, 29: sheath, 30: roller.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kiyofumi Sakurahara No. 1 Yakura, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd. Technical Department (72) Inventor Naru Nagai 1 Yatsukura, Tobe-cho, Iyo-gun, Ehime Pref.Iseki Agricultural Machinery Co., Ltd.

Claims (1)

[Claims] At the upper end of a mast 9 of a rotary tilling apparatus 1, a tillage depth adjusting screw rod 18 for vertically adjusting a gauge wheel 15 is tilted such that a front side is positioned upward and a rear side is positioned downward, and is rotatable. The L-shaped bent handle base 24 is attached to the upper end of the tillage adjusting screw rod 18, and a large grip 2 is attached to the tip of the handle 24.
4a, the grip portion 24a is connected to the screw rod 1 for adjusting the plowing depth.
A tilling depth adjusting device for a rotary tilling device, characterized in that it can be changed between an adjusting state protruding forward from an upper end portion of the rotary tiller 8 and a state retracting rearward from an upper end portion of the tillage adjusting screw rod 18.