JPH1189305A - Tilling shaft detaching structure of rotary tiller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dissolve a problem always requiring a tool in a case of using a bolt in attaching or detaching an elongated tilling shaft to a tilling shaft, or possibly loosening the bolt, or frequently missing a used snapping pin. SOLUTION: This tilling shaft detaching structure is obtained by fixing a connection flange 37 at an end face of a tilling shaft 16 in a rotary tiller and providing arc-like long holes 37a having a shaft center as a center in the connecting flange 37, and forming a pin inserting hole 37b in each side end part of the long holes 37a, in a rotating direction of the tilling shaft 16. On the other hand, a connecting flange 39 is fixed on a fixing side end face of an elongated tilling shaft 21 and pins 39a are projected in the connecting flange 39, then head parts 39b for stopping slip off and corresponding to the pin inserting holes 37b are formed on the top ends of the pins 39a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for enabling an extended tilling shaft to be easily attached to and detached from both ends of a tilling shaft of a rotary tilling device.

[0002]

2. Description of the Related Art Conventionally, a rotary tilling device is mounted on a management machine, and a ridge forming device is attached to the rotary tilling device to form a ridge. And when forming a wide ridge, the ridge was formed by attaching extension tilling shafts on both sides of the tilling shaft. The extension shaft can be mounted by removing the bolts that fix the tilling shaft, fitting the extension tilling shaft and screwing a long bolt, and fixing the extension tilling shaft. The other shaft is formed on the boss and fitted
A flat head pin was inserted and fixed at right angles across the two.

[0003]

However, when changing the ridge width to a narrower ridge width after performing the tilling work by extending the tilling axis, or when reversing the ridge width, or when using bolts,
A tool was always required, and the attachment / detachment work was troublesome, and the bolt could be loosened. In addition, when the flat-head pin is mounted on both sides and connected and fixed, the flat-head pin and the snap pin are lost because they are relatively small because the flat-head pin is locked with a snap pin so that it does not come off. It was easy.

[0004]

The present invention uses the following means in order to solve the above problems. That is, in a rotary tilling apparatus in which an extended tilling shaft is detachable on both sides of a cultivating shaft, a connecting flange is fixed to an end surface of the cultivating shaft, a connecting flange is fixed to a mounting side end surface of the extended tilling shaft, and one of the connecting flanges is fixed to the connecting flange. A projection is provided, and a fitting portion is provided on the other connecting flange.

[0005] Further, the fitting portion is an arc-shaped long hole centered on the axis of the tilling shaft, and an insertion hole for the protruding portion is formed at the rotation direction end of the tilling shaft. The projecting portion is formed of a rod having a retaining portion.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The problems and means to be solved by the present invention are as described above. Next, an embodiment of the present invention shown in the attached drawings will be described. FIG. 1 is a side view of a management machine adopting the present invention, FIG. 2 is a front view thereof, FIG. 3 is an exploded perspective view of a ridge former, FIG. 4 is a sectional view of a tilling shaft and an extended tilling shaft, and FIG. FIG. 6 is a partial perspective view showing a state where an extension tilling axis is removed.

Referring to FIGS. 1 and 2, the entire configuration of a management machine 1 equipped with a tilling shaft according to the present invention will be described. The engine 3 is mounted on the front side of the engine frame 2, and the fuel tank 4 is mounted on the engine 3. A power output shaft is protruded from a side of the engine 3, and power is applied to a pulley on an input shaft protruding above one side wall of the transmission case 6 via a belt from an output pulley on the power output shaft in the belt cover 5. Is conveyed. The belt is tensioned by a tension pulley so that power from the engine 3 can be transmitted into the transmission case 6. The pulley and the belt constitute a belt tension type main clutch device, and an arm for pivotally supporting the tension pulley is connected to a main clutch lever provided on the handle 7 via a wire.

A handle 7 projects upward and obliquely rearward from the upper portion of the transmission case 6, and a main clutch lever, a speed change lever 8, a side clutch lever 9, a work clutch lever, and an accelerator lever 10 are provided on a rear portion of the handle 7. And so on.

An axle 12 for mounting left and right running wheels 11 is mounted laterally below both sides of the transmission case 6, and a hitch 13 is provided at the upper and lower central portion of the rear wall of the transmission case 6.
And the front part of the rotary tillage device 14 is detachably fixed. A PTO shaft protrudes from the other side wall of the transmission case 6, while a chain case 15 is vertically arranged at the left and right center of the rotary tilling device 14, and an input shaft is provided at an upper portion of the chain case 15. Power is transmitted from the PTO shaft to the chain case 15 via a pulley and a belt or a sprocket and a chain in the transmission case 16.

On the lower part of the chain case 15, a tilling shaft 16 is provided.
Are traversed, and tilling claws 17, 17...
Are radially implanted, and the upper part of the rotation locus of the tillage claws 17 is covered with a tillage cover 20.

The cultivation can be carried out by cultivating a wide area, and the extension cultivation shaft 21 can be easily attached to and detached from both ends of the cultivation shaft 16 by using the detachable structure of the present invention.
An extension cover 22 is arranged above the extension tilling shaft 21,
A ridge former 23 is disposed behind the extension cover 22 and the tilling cover 20. The tilling claw 17 is a canard claw, and a spiral rotor is mounted on the extension tilling shaft 21.

The extension cover 22 and the ridge forming device 23 are inverted T
It is attached to a support 24 formed in a letter shape, and the support 24 is fixed to the hitch 13 and attached to the rear end of a beam 25 extending rearward so as to be vertically adjustable. As shown in FIGS. 1, 2 and 3, folding mechanisms 26 are arranged on both sides of the support 24,
Rotating rods 27 are arranged on both sides of the folding mechanism 26, the extension cover 22 is fixed to the front side of the rotating rod 27, and the side forming plate 30 and the gauge wheel 31 are attached to the lower rear. I have. At the center rear of the support 24, a mounting portion protruding from the front center of the upper forming plate 32 is mounted so that the vertical position can be adjusted. On the rear end of the beam 25, locking rods 29, which lock when the extended tilling shaft 21, which will be described later, are removed, protrude upward.

Next, the structure for attaching and detaching the extended tilling shaft 21 of the present invention will be described. As shown in FIG. 4, the tilling shaft 16 is formed in a pipe shape, and one end of the tilling shaft 16 is externally fitted to an output shaft 33 protruding in the left-right direction from the chain case 15 and fixed by a pin 34. A support shaft 35 is inserted and fixed in the end of the tilling shaft 16, a bolt hole is opened through the shaft center of the support shaft 35, a reinforcing bolt 36 is inserted through the bolt hole, and an output shaft 33 is inserted. To be screwed on.

As shown in FIGS. 4, 5 and 6, a disc-shaped connecting flange 37 is fixed to the end face of the tilling shaft 16 so as to be centered. On the other hand, a connecting flange 39 is provided on the inner end face of the extended tilling shaft 21, a protruding portion is provided on the connecting flange 39, and the protruding portion is inserted and fitted into the fitting portion to be connected and fixed. It has a configuration.

That is, the connecting flange 37 is formed with concentric arc-shaped long holes 37a and 37a which are opened at a position shifted by 180 degrees, and are formed at the ends of the long holes 37a and 37a in the rotation direction of the tilling shaft 16 in the rotation direction. Are formed with pin insertion holes 37b having diameters slightly larger than the hole diameter. The tilling shaft 16
The reinforcing plate 38
The connection flange 37 is fixed, and a hole 37 c through which the support shaft 35 can pass is opened at the center of the connection flange 37.

On the other hand, like the connecting flange 37, a disc-shaped connecting flange 3 is provided on the inner end face of the extended tilling shaft 21.
The connecting flange 39 has a hole 39c through which the support shaft 35 can pass. The connecting flange 3 of the connecting flange 39
7, connecting pins 39 a are protruded as rods so as to be parallel to the tilling shaft 16 in accordance with the positions of the pin insertion holes 37 b.
-Heads 39b and 39b are formed at the tip of 39a as retaining portions having a larger diameter than the connecting pin. However, FIGS. 4, 5, and 6 show the extended tillage shaft 21 on the right side with respect to the traveling direction, and the left side is configured symmetrically. The number of the long holes 37a and the connecting pins 39a is not limited, and the number of the long holes 37a and the connecting pins 3a is not limited.
It is also possible to arrange three or more 9a in alignment with each other and to firmly connect them.

In such a configuration, when storing, entering the house, or not using the extension tilling shaft 21, the extension tilling shaft 21 is rotated with the management machine 1 stopped. The head 39
b and 39b are aligned with the pin insertion holes 37b and 37b,
The extension tilling shaft 21 can be removed simply by pulling it outward, and can be easily removed without tools. In the case of mounting in the opposite direction, the heads 39b and 39b of the extension tilling shaft 21 are inserted in alignment with the pin insertion holes 37b and 37b, and the extension tilling shaft 21 is rotated in a direction opposite to the rotation direction of the tilling shaft 16. When the rotation is stopped until the rotation is stopped, the extended tilling shaft 21 does not come off due to the heads 39b and 39b.
It does not fall out even if you rotate. In addition, when mounting, the heads 39b and 39b are
7b and 37b, and by simply rotating the tilling shaft 16, the connecting pins 39a and 39a naturally
7a and 37a can be prevented from coming off by the heads 39b and 39b.

[0018]

According to the present invention, the following effects can be obtained by the configuration described above. In other words, in a rotary tilling device in which an extended tilling shaft is detachable on both sides of the tilling shaft,
The connecting flange was fixed to the end face of the tilling shaft, the connecting flange was fixed to the mounting side end face of the extended tilling shaft, and one connecting flange was provided with a protruding part, and the other connecting flange was provided with a fitting part. It can be detached simply by fitting together with the fitting part, and it can be changed easily and in a short time when going in and out of the house and widening or narrowing the tillage width.

Further, the fitting portion is an arc-shaped long hole centered on the axis of the tilling shaft, and an insertion hole for the projecting portion is formed at the rotation direction end of the tilling shaft. Since the protruding part was formed by a rod having a retaining part, the rod was inserted from the insertion hole and only rotated in the direction opposite to the rotation direction of the tilling shaft, the extended tilling shaft did not come off, Even if the cultivation shaft rotates, it does not come off, so that the lock configuration can be easily configured, and the configuration can be realized at low cost. Further, the extension tilling shaft can be mounted simply by inserting the rod into the insertion hole and rotating the tilling shaft.

[Brief description of the drawings]

FIG. 1 is a side view of a management machine employing the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is an exploded perspective view of the ridge forming device.

FIG. 4 is a sectional view of a tilling shaft and an extended tilling shaft.

FIG. 5 is a side view of a connection flange.

FIG. 6 is a partial perspective view showing a state where an extension tilling shaft is removed.

[Explanation of symbols]

 Reference Signs List 1 management machine 14 rotary tillage device 16 tillage shaft 21 extended tillage shaft 37 connecting flange 37a long hole 37b pin insertion hole 39 connecting flange 39a pin 39b head

Claims (2)

[Claims] In a rotary tilling apparatus in which an extended tilling shaft is detachable on both sides of a tilling shaft, a connecting flange is fixed to an end surface of the tilling shaft, and a connecting flange is fixed to a mounting end surface of the extended tilling shaft. A tilling shaft detachable structure for a rotary tilling device, wherein a protruding portion is provided on a connecting flange and a fitting portion is provided on the other connecting flange. 2. The method according to claim 1, wherein the fitting portion is an arc-shaped long hole centered on the axis of the tilling shaft, and an insertion hole for the projecting portion is formed at a rotation direction end of the tilling shaft. The tilling shaft attaching / detaching structure of the rotary tilling device according to claim 1, wherein the projecting portion is formed by a rod having a retaining portion.