JPH0441762Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a disc rotary tiller comprising a combination of a claw rotor and a disc rotor.

(b) Prior Art As a conventional technology of a disc rotary cultivating device, for example, the one shown in Japanese Utility Model Application Publication No. 57-54201 is known.

(c) Problems to be solved by the invention Conventional disc rotary tillers bend left and right disc shafts, each of which has a plurality of discs fitted at predetermined intervals, to the left and right outer ends of the transmission shaft supported by a transmission case. It is attached via a transmission joint, and the left and right disk shafts are configured so that they are tilted sideways in an eight-shape shape when viewed from above.In the case of such a structure, the parts near the transmission case and the lower side of the transmission case Since the tilling action of the disks did not reach the soil in some areas, there was a problem in that some areas remained tilled.

In addition, in the conventional type, the bending transmission joint that interlocks and connects the transmission shaft and the disk shaft is exposed, so smooth bending operation cannot be expected due to contact with the soil, and it wears out quickly. Furthermore, the flow of plowed soil cut by the disc and moving backward along the disc surface is obstructed by the bending power transmission joint, so the flow of plowed soil from the disc is hindered. There was a problem that the separation of the soil became poor and the tilled soil was transferred around, making it impossible to till the soil properly.

The present invention was devised in view of these problems, and its purpose is to improve soil separation from the disk, ensure smooth transfer of plowed soil, and achieve good plowing with less power required. An object of the present invention is to obtain a disc rotary tiller capable of improving the durability of a bending power transmission joint.

(d) Means for solving the problem That is, the disc rotary tilling device of the present invention has a claw rotor consisting of a tilling claw shaft cylinder equipped with tilling claws, which is fitted onto a transmission shaft supported by a transmission case. In addition, in a disc rotary cultivating device in which a disc rotor is fitted to an inclined work shaft that is interlocked and connected to the left and right protruding ends of the transmission shaft via a bending transmission joint, and the bending transmission joint portion is covered with an elastic boot, A protective cover that accommodates the elastic boot therein and whose outer surface is a spherical surface centered on the bending point of the bending transmission joint is provided around the transmission shaft, and a cylindrical protective cover that fits onto the spherical surface is provided. , is characterized in that the concave surface of the innermost disk of the disk rotor is attached to the crotch.

(e) Effects of the invention The disc rotary cultivating device according to the invention has a claw rotor fitted to a transmission shaft supported by a transmission case, and a disc rotor fitted to the left and right protruding ends of the transmission shaft via bent transmission joints. Since the soil is installed in a fixed manner, the soil near the transmission case and under the transmission case is plowed by the claw rotor, and good plowing with no residual plowing is achieved as a whole.

Since a cylindrical protective cover that circumscribes the spherical surface of the protective cover on the transmission shaft is provided on the concave surface of the disk, the tilled soil that is cut by the disk and moves backward along the concave surface is The large diameter and smooth outer circumferential surface of the protective cover assists the removal of the tilled soil from the disk, and the tilled soil does not move around and moves smoothly backwards, resulting in less power required. Cultivation is carried out.

In addition, the bending power transmission joint part is covered with an oil-sealed elastic boot that follows the bending, and the outer side of the joint is covered by the cooperative function of the spherical protective cover and the cylindrical protective cover, so that the bending power transmission joint is double-encased. The bending operation of the joint operates smoothly without any hindrance, and the bending power transmission joint does not come into contact with plowed soil, so it operates with good durability over a long period of time.

(F) Embodiments Next, embodiments of the present invention will be described with reference to the drawings.

Fig. 1 is a plan view of the disc rotary tilling device according to the present invention, Fig. 2 is an enlarged sectional view of its main parts, and Fig. 3
The figure is a side view of the disc rotary tiller.

In Figures 1 to 3, reference numeral 1 is a traveling transmission case, in which driving wheels 2, 2 are fitted to the axle supported at the bottom, and a disc rotary tilling device R is attached to the rear part. A machine connection part 3 is provided.

The disc rotary tiller R connects the attachment part provided on the upper front surface of the transmission case 4 located at the center in the width direction to the working machine connection part 3, thereby allowing the traveling transmission case, that is, the machine body to It is designed to be able to be attached and detached at will.

At the lower end of the transmission case 4, the fuselage center line P-P
A horizontally oriented transmission shaft 5 perpendicular to the transmission case 4 is supported, and the transmission shaft 5 is driven by a transmission mechanism housed in the transmission case 4.

Further, a beam 6 extends rearward from the transmission case 4, and a ridge erector mounting tube 7 and a tail wheel support tube 8 are provided at the rear end thereof, and a gauge wheel 9 for setting the plowing depth is provided on the tail wheel support tube 8. is installed so that its vertical position can be adjusted freely, and furthermore, tillage covers 10 are installed on both left and right sides of the beam 6.
is equipped with.

A tilling claw shaft cylinder 1 is provided on the left and right protruding parts of the transmission shaft 5.
A claw rotor with tiller claws 14, 14 attached to the outer periphery of the power transmission shaft 5 is equipped with a claw rotor, respectively, and inclined working shafts 13, 13 are connected to the left and right protruding ends of the power transmission shaft 5 via bending power transmission joints 12, 12, respectively. Disc rotors D and D are connected and connected to each other and fitted onto the respective tilting work shafts 13.

Note that the tiller claw 14 of each claw rotor has a horizontal blade that bends toward the transmission case, that is, inwardly.
Rotate the base of each claw body toward each other in the direction of rotation.
They are inserted and fixed into brackets 15, 15 provided on the outer periphery of the tilling claw shaft cylinders 11, 11 with a 180° phase shift.

Further, the disk rotors D, D are configured by mounting disk-shaped disks 16a in parallel on the inclined work shaft 13 with the concave surfaces facing inward, and each disk rotor D is arranged in parallel with the inclined work shaft 13 with the concave surface facing inward. The disk 1 is bent at the bending points O, O of the bending transmission joints 12, 12.
6a... are inclined backward and inward, and shaft supports 17, 17 fitted to the shaft ends are provided on the tillage cover 10 and supported by support frames 18, 18.

The bending power transmission joints 12, 12 are coated with lubricating oil and then covered with elastic boots 19, 19 made of a rubber material or the like in a bellows shape. This is characterized in that the outer sides of the elastic boots 19, 19 are covered in a double layer with the following structure.

That is, as shown in FIG. 2, a protective cover 21 whose outer surface is a spherical surface 20 centered at the bending point O of the bending transmission joint is attached to the transmission shaft 5.
An elastic boot 19 is provided in the inner space of the protective cover 21.
A cylindrical protective cover 2 is attached to the inclined transmission shaft 13, that is, to the concave surface of the innermost disk 16a in the disk rotor D.
2 is externally fitted onto the spherical surface 20 and covers the outer periphery of the elastic boot 19 by cooperation of the protective cover 21 and the cylindrical protective cover 22.

In the disc rotary cultivating device R having such a structure, the tilling claw shaft cylinder 1 is rotated by the rotation of the transmission shaft 5.
1 and 11 rotate, and the inclined work shafts 13 and 1 are connected from the transmission shaft 5 through the bending transmission joints 12 and 12.
3, and the disc rotors D and D are also driven.

And the tilling claw 1 of the tilling claw shaft cylinder 11, 11
4 and 14 till the soil in the part near the transmission case 4, and each disc 16a of the disc rotors D and D located on both sides plow the soil in the part outside of the part plowed by the tiller claws. The soil is cut into pieces, and the cut soil is transferred diagonally backward along the concave surface of the disk, and the soil is inverted tilled so as to cover the top of the tilled soil made by the tiller claws.

When such plowing is performed, each of the bending power transmission joints 12, 12 rotates around the bending point O while changing the bending state, but the bending power transmission joint portions have elastic boots 19, 19 that follow the bending. It is covered with an oil seal by the spherical protective cover 21 and the cylindrical protective cover 22, and its outer side is covered so as to follow the angle change due to the sliding contact between the spherical protective cover 21 and the cylindrical protective cover 22, so it can operate without any trouble even though it is double enclosed. , bending transmission joint 12
It is isolated so that the cultivated soil does not come into contact with it,
Durable and works well over a long period of time.

Therefore, the tilled soil moving backward along the concave surface of the disk 16a is held down by the outer peripheral surface of the cylindrical protective cover 22 provided on the concave surface of the disk 16a.
The separation from 6a is assisted, and the transition to the rear is smooth without being carried around.

[Brief explanation of the drawing]

Figure 1 is a plan view of the disc rotary tiller according to the present invention, Figure 2 is an enlarged sectional view of its main parts, and Figure 3 is a plan view of the disc rotary tiller according to the present invention.
The figure is an overall side view of the disc rotary tiller. 4... Transmission case, 5... Transmission shaft, 11... Tilling claw shaft cylinder, 12... Flexible transmission joint, 13... Inclined working shaft, 14... Tilling claw, 13... Inclined working shaft, 16a ...Disk, 19...Elastic boots,
20... Spherical surface, 21... Protective cover, 22... Cylindrical protective cover, D... Disc rotor, O... Refraction point.

Claims (1)

[Scope of utility model registration request] Cultivating claw shaft cylinder 1 equipped with cultivating claws 14, 14
1 and 11 is fitted onto a transmission shaft 5 supported by a transmission case 4, and an inclined working shaft 13 is interlocked with the left and right protruding ends of the transmission shaft 5 via bending transmission joints 12, 12. 13, disk rotor D,
In the disc rotary tilling device, the elastic boots 19, 19 cover the bending power transmission joints 12, 19, and the elastic boots 19, 19 are fitted, and the outer surface is connected to the bending power transmission joint. 12
A protective cover 21 having a spherical surface 20 centered at the bending point O of the transmission shaft 5 is provided on the side of the transmission shaft 5, and a cylindrical protective cover 22 is fitted onto the spherical surface 20.
, disk rotor D, the innermost disk 1 of D
A disc rotary tiller that is attached to the concave side of 6a.