JPS6031441Y2 - Reversing device in rotary tiller - Google Patents

Description

[Detailed Description of the Invention] The purpose of the present invention is to reverse the tilling shaft in a rotary device such as a tractor or a tiller.

More specifically, the specific purpose of this invention is to eliminate the complexity of the structure of conventional devices such as a reverse rotation prevention device in a rotary tiller described in Japanese Utility Model Publication No. 53-49688.

The reversing device in a conventional rotary tiller is an integral mechanism that includes the bevel gear box lid, input shaft, two bevel gears, a part of the transmission shaft, etc., and is removed and replaced in order to reverse the rotary tiller.

However, the disadvantage of this device is that it is necessary to divide the transmission shaft into two parts and connect them with a clutch device. The drawback was that it was difficult to align the axes of the book's power transmission shaft, and it required a level of skill to assemble it.

In this invention, the transmission shaft is divided into two parts,
The transmission shaft is cantilever-supported in the bevel gear box, the bevel gear on the transmission shaft side can be freely removed, and the distance between the tip of the transmission shaft 10 and the inner end surface of the bevel gear hook is greater than the width 1 of the bevel gear 1 on the transmission shaft 10. is made larger, the bevel gear 1 can be taken out, and after being taken out, the direction is reversed, a spacer is inserted this time, the bevel gear is inserted and fixed, and the rotary tilling device is reversed.

Reversing the rotary tillage device is used when field crops require soil to be poured backwards or when deep plowing is required, and recently, as the number of crops changing from rice to land crops has increased, it has become necessary to perform various miscellaneous tasks on various crops. As a result, a reversible rotary tiller is required.

The structure of the present invention will be explained based on the attached drawings. Figure 1 is an overall side view of a tractor equipped with a rotary tiller.

A rotary tiller is installed via a three-point link attachment device installed on the rear of the transmission case of Tractor A.

A top link 18 is attached to the upper part of the rotary tiller, and a lower link 17 is attached to the lower part, and the rotary tiller is raised and lowered via a hydraulic system and a lift arm.

A universal joint 15 is interposed between the input shaft 6 that protrudes forward from the bevel gear box of the rotary tilling device on the PTO shaft 6 that is protruded from the rear surface of the transmission case of the tractor, regardless of whether the tilling device is raised or lowered. Transmit power.

8 is a bevel gear box, and 12 is a transmission case.

FIG. 2 is a partially sectional plan view showing the transmission structure of the rotary tiller.

Power is transmitted to the input shaft 6 via the universal joint 15, and the power is transmitted from the bevel gear 5 fixed to the input shaft 6 to the bevel gear 1 on the transmission shaft 10 by changing the direction at right angles.

The transmission shaft 10 transmits power into a tilling case 12 on the side of the tilling device, and a gear or chain inside the tilling case 12 rotates a tilling shaft 13.

A plurality of tilling claws 14 are planted on the tilling shaft 13.

Figure 3 shows the bevel gear box 8 of the rotary tiller.
FIG. 4 is also a sectional view.

Figures 3 and 4 are drawings showing the main parts of the present invention, and between the two figures, the bevel gear 1 is installed interchangeably on the left and right sides.

The transmission shaft 10 has one left end supported by a bearing in the tilling case shown in FIG. 2, and a midway part supported by a radial roller bearing 7 in the bevel gear box.
Then the right part protrudes into the gearbox in a cantilevered manner.

A spline 10a is carved into the portion of the transmission shaft 10 that protrudes into the bevel gear box δ, and a screw 10b is further cut on the spline at the right end, and a stopper 3 is fitted onto the screw 10b. .

Reference numeral 4 denotes a locking fitting for preventing rotational loosening of the stopper 3.

A spacer 2 and a bevel gear 1 are fitted between a radial roller bearing 7 and a locking fitting 4 so as to be interchangeable with each other.

In order to replace the bevel gear 1, it is necessary to remove the spacer 2 and the bevel gear 1 from the transmission shaft 10 and insert them in the opposite direction.
The distance to the inner end surface of the bevel gear 1 is made larger than the width 1 of the bevel gear 1, so that the bevel box lid 9 can be taken out from the opening through which the bevel box cover 9 is removed and reassembled after changing its orientation.

Pull out spacer 2 to the right and attach bevel gear box 8.
Remove the caster from Omukai.

As described above, in the present invention, the input shaft 6 and the bevel gear 5 are configured to be detachable together with the bevel gear box lid 9, and the bevel gear 1 on the cantilevered transmission shaft 10 can be fixed in either the forward or reverse direction. In order to reverse, the width l of bevel gear 1
Since the distance between the tip of the transmission shaft 10 and the inner end surface of the bevel gear box is made larger than that, the rotary tiller can be reversed without a clutch on the shaft.

Furthermore, by omitting one bearing from the conventional bevel gear box without a reversing device, supporting the transmission shaft 10 in a cantilever manner, and providing a spacer on the side of the bevel gear 1, it is possible to obtain the effect with a simple structure. It is something.

[Brief explanation of drawings]

Figure 1 is an overall side view of a tractor equipped with a rotary tiller, Figure 2 is a partial cross-sectional plan view showing the transmission structure of the rotary tiller, and Figure 3 is a cross-section of a bevel gearbox showing the operating state of the present invention. Similarly, FIG. 4 is a sectional view of the bevel gearbox. 1... Bevel gear, 2... Spacer, 3... Stopper, 4... Loosening stopper, End... Bevel gear box, 10. ...
...Transmission shaft.

Claims (1)

[Scope of utility model registration request] Input shaft 6 and bevel gear 5 together with bevel gear box lid 9
The bevel gear 1 on the transmission shaft 10 supported on a cantilever is configured to be removable and can be fixed in the forward or reverse direction. A reversing device for a rotary tiller, characterized in that the distance to the inner end face of the box is increased.