JPH052963Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field The present invention is configured to maintain a constant ground attitude at all times as the rotary tilling device attached to the rear of the tractor moves up and down.

(b) Prior art As the rotary tilling device attached to the rear of the tractor moves up and down, the tractor tilling device is attached to the attached link between the tractor and the rotary tilling device in order to maintain a constant attitude of the rotary tilling device against the ground. The technology for making the beam rotatable around the main beam was previously filed by the same applicant.

In addition, in a three-point link type work equipment attachment device, a technique for correcting and rotating the posture of the rotary tiller is known as disclosed in Japanese Utility Model Application No. 54-82707. In a machine mounting device, a technique for fixing a top link to a bracket is known as disclosed in Japanese Utility Model Application No. 54-3412.

(c) Problems that the invention aims to solve Even during tillage, the tillage case, tillage cover, etc. remain in a constant position relative to the ground, and even if the rotary tiller moves up and down with respect to the soil surface during tilling using the automatic tillage depth control mechanism, the rotary tiller remains stable. Since the ground position does not change, the tilling condition and the soil scattering condition are always constant, and the finished condition after tilling is improved.

However, when installing the rotary tillage device on a tractor, the attachment link and tillage case are rotatable, making it impossible to maintain the attachment link etc. in a constant state. The problem was that it became difficult to do so.

The present invention is designed to solve this problem.

(d) Means for solving the problem The purpose of the present invention is as described above. Next, the configuration for achieving the purpose will be explained.

When the rotary tilling device attached to the rear of the tractor is moved up and down by the hydraulic lift arm 10, the rotary tilling device is configured to be capable of corrective rotation around the main beam 21 which is pivotally supported by the mounting link 4 interposed between the tractor and the tractor. In a configuration in which the corrective rotation is performed by a rotation link interposed between the bracket 8 on the tractor side and the rotation arm 7 fixed to the main beam 21, when the rotary tilling device is attached or detached,
A locking mechanism is provided which is integrated with the rotation link and the mounting link 4.

(e) Embodiments and operations The purpose and structure of the present invention are as described above, and the structure of the embodiments shown in the attached drawings and the functions of the invention will be explained below.

Figure 1 is a side view of the rotary tilling device of the present invention attached to the rear of a tractor, Figure 2 is a side view of the attachment link and main beam locked in a non-rotatable manner, and Figure 3 is a view of the tractor and rotary tiller. An enlarged side view of the attachment part of the tillage device, FIG. 4 is a plan view as well, FIG. 5 is a plan view showing the rotation mechanism using the rotation link and main beam, and FIG. 6 is a state in which the front rotation link is locked. 7 and 8 are a plan view and a perspective view of the locking mechanism.

The overall configuration will be explained with reference to FIGS. 1 and 2.

A hydraulic case A is fixedly installed on a transmission case B of a tractor. A hydraulic lift arm 10 rotatably protrudes from the hydraulic case A, and a mounting link 4 is rotatably suspended via a lift link 13.

Also protruding from the rear of mission case B.
Tractor-side links 15 are protruded on the left and right sides of the PTO shaft 14, and a pivot pin 16 at the front end of the attachment link 4 is guided to the rear end of the tractor-side link 15 by a guide 30, and is prevented from coming off by the pin. -ing

The rotary tiller rotates up and down about the pivot pin 16.

However, since the vertical movement of the rotary tillage device is a rotation drawing a circular arc, in the conventional tillage device, the tilling claws 24 and the tillage cover 19 change their posture relative to the ground as they move up and down due to the tillage depth adjustment. occurs,
Differences were emerging in the tillage conditions and soil release conditions.

In the present invention, in order to eliminate this problem, a correction rotation mechanism is provided in order to correct the rotation of the rotary tilling device that causes this problem as the rotary tilling device moves up and down. It is composed of

The corrective rotation is achieved by integrating the tilling case 9 and the tilling cover 19 of the rotary tilling device with the main beam 21, which is rotatably supported on the attachment link 4, and by which the main beam 2 is rotated.
This correction rotation of 1 is obtained by connecting the front rotation link 2, the rear rotation link 6, and the rotation arm 7 to the bracket 8 on the mission case B side.

The rotating arm 7 is fixed to the main beam 21, and if the rotating arm 7 and the bracket 8 are connected by a single rotating link, corrective rotation is possible. , rear rotation link 6
If the rotating arm 7 and the bracket 8 rotate significantly, the rotating link will become stretched and prevent further rotation, so the rotating link between the rotating arm 7 and the bracket 8 should be replaced by It is divided into 2 and a rear rotation link 6, and can be bent between them.

As a result, when the rotary tilling device rotates significantly upward, the counter link 5 is moved between the attachment link 4 and the front rotation link so that the front rotation link 2 and the rear rotation link 6 are folded upward. It is arranged between the connecting pin 11 of the rotation link 2 and the rear rotation link 6.

The rear end of the rear rotation link 6 and the rotation arm 7 are pivotally connected by a connecting pin 12. With this configuration, when the rotary tiller is rotated upward, the space between the rotating arm 7 and the bracket 8 becomes narrower, but this gap does not narrow because of the front rotating link 2 and the rear rotating link 6, and the rear The rotary arm 7 is pushed by the rotary link 6, and is rotated in a corrective manner so that the posture of the main beam 21, rotary gear box 20, tilling case 9, etc. relative to the ground remains constant.

17 is an input shaft that transmits the power of the PTO shaft 14 to the rotary gearbox 20;
A universal joint is interposed between the input shaft 17 and the input shaft 17.

23 is a rear cover pivotally supported on the rear end of the tilling cover 19; 25 is a tilling claw shaft protruding left and right from the lower end of the tilling case 9; the tilling claw 2 is attached to the tilling claw shaft;
4 have been planted.

Further, a depth frame 18 is provided fixed to the rotating arm 7 and the main beam 21, and a depth wheel 26 is provided at the rear end of the depth frame 18.
is supported. The depth frame 1
8 and the depth wheel 26 also perform correction rotation together with the main beam 21 and the tilling case 9.

In the above configuration, when the rotary tilling device capable of corrective rotation is removed from the tractor, the mounting link 4 and the tilling case 9 are configured to be rotatable, so that the relative position of the two can be changed. is not determined, and even if you try to attach it to the tractor again, you will not be able to guide the pivot pin 16 at the tip of the attachment link 4 into the guide guide 30.

In order to solve this problem, in this invention,
The lock arm 1 is attached to the mounting link 4.

As shown in FIGS. 7 and 8, the lock arm 1 is composed of a fixing rod 1a, a mounting portion 1b, and a stopper 1c, and the stopper 1c is fixed to the lower side of the lock arm 1.

Align the tip of the front rotation link 2 with the lock arm 1, insert the connecting pin 3, and attach the mounting link 4.
Since it is difficult to match the pin hole at the tip of the front rotation link 2 with the pin hole in the lock arm 1, a stopper 1c is provided on the lock arm 1 and the tiller case 9 is integrated.
By bringing the tip of the front rotation link 2 into contact with the front rotation link 2, further movement of the front rotation link 2 is prevented and the insertion hole of the connecting pin 3 is aligned.

(f) Effects of the invention Since the invention is constructed as described above, it has the following effects.

First, when the rotary tillage device is moved up and down to adjust tillage, the tilling claws 24 and tillage cover 19 are always kept at a constant position relative to the soil surface by corrective rotation so as not to change the ground attitude. This allows the tilled soil to be maintained in the same position, and the finished state of the tilled soil and the size of the soil clod to be constant.

Secondly, because the tilling case 9 is freely rotatable relative to the mounting link 4, when the rotary tilling device is removed from the tractor, the rotary tilling device loses stability and becomes difficult to maintain in a constant position. However, by providing the lock arm 1, when the rotary tilling device is removed from the tractor, the tip of the front pivot link 2 can be connected to the lock arm 1, making it possible to create a rotary tilling device with the tilling case 9 and mounting link 4 integrated, the same as in the conventional rotary tilling device, and this makes it easy to remove from the tractor and reattach it.

[Brief explanation of the drawing]

Figure 1 is a side view of the rotary tilling device of the present invention attached to the rear of a tractor, Figure 2 is a side view of the attachment link and main beam locked in a non-rotatable manner, and Figure 3 is a view of the tractor and rotary tiller. An enlarged side view of the attachment part of the tillage device, FIG. 4 is a plan view as well, FIG. 5 is a plan view showing the rotation mechanism using the rotation link and the main beam, and FIG. 6 is a state in which the front rotation link is locked. 7 and 8 are a plan view and a perspective view of the locking mechanism. 1...Lock arm, 1c...Stopper, 2
...Front rotating link, 3... Connecting pin, 4... Mounting link, 6... Rear rotating link, 7... Rotating arm, 8... Bracket, 9... Tilling case, 1
9... Cultivation cover, 21... Main beam.

Claims (1)

[Scope of utility model registration request] When the rotary tilling device attached to the rear of the tractor is moved up and down by the hydraulic lift arm 10, the rotary tilling device is configured to be capable of corrective rotation around the main beam 21 which is pivotally supported by the mounting link 4 interposed between the tractor and the tractor. In a configuration in which the corrective rotation is performed by a rotation link interposed between the bracket 8 on the tractor side and the rotation arm 7 fixed to the main beam 21, when the rotary tilling device is attached or detached,
A rotary tillage device characterized in that a locking mechanism is provided which is integrated with the rotation link and the mounting link 4.