JPS628161Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is an attachment device for agricultural working machines such as garden tractors.
The present invention relates to an attachment device for selectively attaching a wheel or a working device to an axle of an agricultural working machine.

In other words, when the axle of an agricultural working machine such as a garden tractor is directly attached to a working device for plowing, etc., the maximum torque should be transmitted from the axle side to the working device. The cross-sectional shape of the axle is a regular polygon such as a regular hexagon.On the other hand, when an agricultural working machine is used as a management machine and a regular wheel is attached to the axle, the cross-sectional shape of the axle is a regular polygon such as a regular hexagon. It is said to be circular. In the conventional case, the attachment for mounting a working device on a square axle has a square axle insertion hole corresponding to the square axle, and the attachment for mounting a wheel on a circular axle has a Each axle has a circular axle insertion hole corresponding to the circular axle, and different attachments have been used depending on the shape of the axle.

The purpose of this invention is to make it possible to selectively attach a working device or axle to the axle using a common attachment, regardless of whether the axle shape of the agricultural working machine is square or circular. An object of the present invention is to provide a new attachment device for an agricultural working machine.

Regarding the illustrated embodiment, the structure of the attachment device in the agricultural working machine according to the invention will be explained. As shown in FIG.
A garden tractor T is equipped with a transmission case 2 in the center and a handle 3 in the rear, and in the illustrated case, a rotary part 4 is connected to the rear of the machine via a hitch. An attachment device A for selectively attaching the illustrated wheel 6 or an alternative working device (not illustrated) to the axle 5 of the T is as follows:
According to this idea, it has the following configuration.

That is, as shown in FIG. 2, this attachment device A includes a flange portion 8 formed with a mounting hole 7 for attaching to a wheel 6 or a working device, and a boss portion 9 located at the center of this flange portion 8. As usual, the boss part 9 is provided with a boss part 9 forming an axle insertion hole 10 penetrating through the inside thereof, and the wheel 6 or Although it is supposed to be attached to a working device, the axle insertion hole 10 described above is
As can be clearly seen from Fig. 2, the center O is placed on the axis of the axle insertion hole 10 at the center of each side of a regular hexagon whose cross-sectional shape has a distance of L between two opposing sides. It is configured to have a shape having an arcuate recess 10a with a radius R. In FIG. 2, P and C represent the above-mentioned virtual regular hexagon with an interval L between two opposite sides, and a virtual circle with a center O and a radius R, respectively.

Since the attachment device A according to this invention is configured as described above, for an axle 5P having a regular hexagonal cross-sectional shape, as shown in FIG. The outer surface of the axle 5P is aligned with the inner surface of the axle insertion hole 10, and for an axle 5C having a circular cross-sectional shape, the outer surface of the axle 5C is aligned with the inner surface of the axle insertion hole 10 on the surface of the recess 10a, as shown in FIG. The axles 5P, 5C are respectively inserted into the axle insertion holes 10 along the axles 5P, 5C, so that the attachment A can be externally mounted onto the axles 5P, 5C.

As described above, the attachment device for the agricultural working machine of this invention is suitable for agricultural use if it is installed on the wheels and the working device, or alternatively installed on the wheels and the working device. Whether the axle of the working machine is a regular polygon or a circle, this attachment device can be attached to the axle by using an axle insertion hole with a cross-sectional shape that is a combination of a regular polygon and a circle. Therefore, it is possible to selectively attach the wheel and the working device equipped with the device, and it is extremely convenient to use, and this device is common to the wheels and the working device. The attachment device is also advantageous in manufacturing and economically.

[Brief explanation of the drawing]

Fig. 1 is a side view of an example of an agricultural working machine capable of implementing this invention, Fig. 2 is an enlarged longitudinal cross-sectional view of an embodiment of this invention, and Figs. 3 and 4 show the state of use of the same embodiment. FIG. T...Garden tractor, A...Attachment device, P...Virtual regular hexagon, C...Virtual circle,
5, 5P, 5C...Axle, 6...Wheel, 7...Mounting hole, 8...Flange part, 9...Boss part, 10...
...Axle insertion hole, 10a...recess.

Claims (1)

[Scope of utility model registration request] This is an attachment device for selectively attaching a wheel or a working device to the axle of an agricultural working machine, and the cross-sectional shape of the axle insertion hole is set at the center of each side of a regular polygon and on the axis of the axle insertion hole. 1. An attachment device characterized by being set in a shape having an arc-shaped recess at the center.