JPS5921563B2 - Device to prevent foreign matter from wrapping around the bearing part of the tiller claw shaft - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for preventing foreign matter from wrapping around the bearing part of a tilling claw shaft, and is mainly used to prevent foreign matter from wrapping around the bearing part of the tilling claw shaft of a side drive type rotary. This protects the oil seal of the bearing part by preventing contaminants such as those from adhering in a coiled manner.

Conventionally, in the tilling claw shaft of a side drive type rotary, a part of the bearing case is covered with the flange of the end shaft, and a dustproof cover is interposed between the bearing case and the flange facing each other. Although the oil seal on the bearing part is dust-proof, if the field is littered with foreign matter such as grass or straw, or if you are cultivating along the edge of a furrow, A large amount of foreign matter adheres to the outer circumferential surface of the end shaft and bearing case, and
This may impede the smooth rotation of the end shaft, and there is a risk that the oil seal, etc. of the bearing may be damaged due to foreign matter entering from between the facing surfaces. In order to remove the objects, it is necessary to manually remove the foreign objects using a sickle or the like, which also reduces work efficiency.

In order to solve these problems, the present invention has been devised to automatically and actively remove the foreign matter by using a rotating tiller claw shaft. The end shaft is rotatably supported in a bearing part in a bearing case with a circular outer circumferential surface assembled to the
In this end shaft, a claw shaft is flange-jointed, a fixed wing piece is provided on the chain case side, and a rotary wing piece is provided in proximity to the fixed wing piece on the claw shaft side, and the fixed wing piece is The rotor blade piece is formed parallel to a plane perpendicular to the axis of the claw shaft, and the rotor blade piece has a crowned surface extending from the flange joint part to one side of the fixed blade along the outer peripheral surface of the bearing case, and an extension of this crowned surface. It has an abutting surface that extends radially outward from the installed end and can closely face the fixed wing piece, and a wiping surface that extends obliquely from near the extending end of the abutting surface toward the base of the crowned surface. However, it is formed into a substantially triangular pyramid shape that gradually increases in size from the leading side to the trailing side in the rotation direction.

The present invention will be specifically explained below based on the illustrated embodiments,
Figures 1 and 2 show the bearing part of the tilling claw shaft of a side-drive rotary. 1 is a circular claw shaft of a constant length, and a large number of tilling claws 2 are formed on the outer circumferential surface of the shaft. They are arranged in rows.

3 is a circular flange integrally connected to the end of the claw shaft 1;
is an end shaft of the claw shaft 1, and is provided with a flange 5 to be joined to the 7 flange 3 of the claw shaft 1, and an appropriate number of bolts 6 are inserted through both the joined flanges 3, 5. By doing so, the pawl shaft 1 and its end shaft 4 are detachably assembled to each other and rotate together.

Reference numeral 7 denotes a ceno case plate, and a ceno cover 8 is fixed to the case plate 7 with bolts 9 to be assembled as a ceno case.

Reference numeral 10 denotes a bearing case fixed to the Cheno case plate 7 with bolts 11, the outer peripheral surface of which is formed in a circular shape, and a bearing 12 held on the inner peripheral surface of the bearing case.
The end shaft 4 is rotatably supported at.

13 is an oil seal also interposed between the end shaft 4 and the inner peripheral surface of the bearing case 10, and 14 is the end shaft 4.
A dustproof cover 15 is interposed between the facing flange 5 and the bearing case 10, a sprocket 15 is spline-fitted on the end shaft 4, and a lock nut 16 is attached to the outer end of the end shaft 4. Efforts are being made to stop this.

Although not shown in the drawings, the pawl shaft 1 and its end shaft 4 are rotationally driven by the chino through mutual gear engagement between the pinion shaft and the bevel gear shaft in the rotary gear case. Nor.

Therefore, in the case of the present invention, the circular flange 3 of the claw shaft 1 is
The flange 3 is formed to have a slightly larger diameter than the bearing case 10 having a circular outer circumferential surface, and a predetermined number of impurity removing rotor blades 17 are attached to the outer circumferential surface of the flange 3 by means of welding, bolting, etc. , are attached to extend in the direction in which the bearing case 10 exists.

The rotary blade piece 17 has a crowned surface 17a formed along the outer peripheral surface of the bearing case 10 and having a width sufficient to cover the outer peripheral surface of the bearing case 10.
and a contact surface 17b that protrudes outward from the tip of the crowned surface 17a in parallel to the rotational direction P of the claw shaft 1;
The wiping surface 17c extends at a constant slope with respect to the rotation direction P of the wiping surface 17c. is formed as a blade.

That is, the rotor blade 17 has a crowned surface 17a extending from the flange joint portion 3.5 along the outer circumferential surface of the bearing case 10 toward the fixed blade 18 side, and a diameter from the extending end of the crowned surface 17a. A contact surface 17b that is abraded outward and can closely face the fixed wing piece 18, and an inclined extension from the vicinity of the extending end of the contact surface 17b to the base of the crowned surface 17a (flange 3 side end) It is formed into a substantially triangular pyramid shape that gradually increases in size from the leading side to the trailing side in the rotation direction P of the claw shaft 1.

On the other hand, reference numeral 18 denotes a predetermined number of fixed wing pieces for removing foreign matter that are opposed to the contact surface 17b of the rotary wing piece 170, and in the illustrated example, they are attached to the lower abdomen of the chenoké case, especially the chenok cover 8, with bolts 9. A wear-prevention protective cover 19 colinearly fixed in a coronal shape is extended to cover the lower abdomen of the cheno case plate γ,
It is constructed by having its tip protrude outward in parallel to the rotational direction P of the claw shaft, and preferably the protruding edge portion is used as the blade body.

The fixed blade piece 18 is rubbed against the contact surface 17b of the rotary blade piece 17, or is opposed to the contact surface 17b of the rotary blade piece 17 with a small gap of approximately 0.5 to 1 m. 7 Since it is on the fixed side with respect to the rotary blade piece 17 that rotates together with the flange 3, it is not limited to being bent from the protective cover 19, but may be formed protruding from the cheno case plate 7 or the cheno cover 8, for example. It's okay.

Further, the rotor blade piece 17 may also be provided protruding from the seven flange 5 of the end shaft 4 in the same manner as described above.

A small gap of approximately 1 mm is maintained between the crowned surface 17a of the rotary blade piece 17 and the outer circumferential surface of the bearing case 10, so that the rotation accompanying the flange 3 of the pawl shaft 1 is maintained. The blade can rotate 170 times.

As described above, according to the configuration shown in the embodiment of the present invention, the rotor blade piece 17 is attached to the 7 flange 3 of the pawl shaft 1, so that it rotates together with the pawl shaft 1, and the bearing case 10 It extends to cover the outer peripheral surface of the
The fixed wing piece 18 that is in contact with the wing piece 17 is connected to the protective cover 1.
9 or the like, so that the rotation of the claw shaft 1 can automatically remove foreign matter such as grass and straw between the rotary blade piece 17 and the fixed blade piece 18, as if sweeping away foreign matter. ,
There is no room for these foreign substances to enter the bearing case 10, and the fear of damaging the oil seal 13 and the like in the bearing portion of the claw shaft 1 is eliminated.

In particular, the protruding end edge of the rotary wing piece 11 on the contact surface 17b serves as a blade body, and the protruding end edge of the fixed wing piece 18 also serves as a blade body, and the two are placed opposite each other so as to be able to rub each other. In this case, while the rotary blade piece 17 is used as a rotary blade and the fixed blade piece 18 is used as a fixed blade, the above-mentioned foreign matter can be cut along with the rotation of the claw shaft 1, and the fragments can be scattered outward. In this respect, it is possible to obtain a more complete effect of preventing contaminants from becoming entangled and a more complete effect of protecting the bearing portion, which can be practically advantageous.

According to the present invention described in detail above, the rotor blade extends to cover the bearing case, closely faces the fixed blade, and is formed into a substantially pyramidal shape that gradually increases in size toward the trailing side in the rotational direction. Therefore, the crowned surface completely prevents foreign matter such as grass straw that tries to wrap around the bearing case from entering the bearing part, and the contact surface and the fixed wing piece, which gradually increase in diameter, cut or It is possible to reliably remove debris such as tearing, etc., and furthermore, with the gradually increasing and inclined wiping surface, the foreign matter removed by the contact surface and the foreign matter wrapped around this wiping surface can be swept away toward the nail shaft side. , it becomes possible to more completely prevent contaminants from becoming entangled.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional side view of main parts according to an embodiment of the present invention, and FIG.
The figure is also a longitudinal sectional front view of the main parts. 1...Claw shaft, 3, 5...Flange, 4
...End shaft, 7...Chain case plate,
8... Chain cover, 10... Bearing case, 17... Rotor blade piece, 1B...
...Fixed wing piece, 19...Protective cover.

Claims (1)

[Claims] 1. An end shaft is rotatably supported in a bearing part in a bearing case with a circular outer peripheral surface assembled to a chain case, a pawl shaft is flange-jointed to this end shaft, and a fixed wing piece is provided on the chain case side. , in which a rotary blade piece is provided on the claw shaft side in proximity to a fixed blade piece, the fixed blade piece is formed parallel to a plane perpendicular to the axis of the claw shaft, and the rotary blade piece is flange-jointed. A crowned surface extends from the bearing case toward one side of the fixed wing along the outer circumferential surface of the bearing case, and a contact surface extends radially outward from the extended end of the crowned surface so as to be able to closely face the fixed wing piece. and a wiping surface that extends obliquely from near the extending end of the contact surface to the base of the crowned surface, and is formed into a substantially triangular pyramid shape that gradually increases in size from the leading side to the trailing side in the rotational direction. A device for preventing foreign matter from wrapping around a bearing part of a tilling claw shaft.