JPH06335302A - Device for attaching tilling tine - Google Patents

Abstract

PURPOSE:To surely stop the rotation and looseness of a bolt in a simple structure. CONSTITUTION:A washer 12 has a contact plate part 13 contacting with a tilling tine 10. Insertion holes 14 for inserting two bolts 16 are formed in the contact plate part 13. A rotation-stopping part 15 for stopping the rotations of the bolt heads of the two bolts are formed in the contact plate part 13. The opening edge 26 of each insertion hole 14 is formed in a state capable of being elastically deformed in the insertion direction of the bolt 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cultivating claw mounting device,
For example, the present invention relates to a means for attaching each of the plowing pawls in a rotary working body including a large number of plowing pawls for plowing the field.

[0002]

2. Description of the Related Art Conventionally, as a plowing claw attachment device of this type, for example, a large number of flanges are arranged and fixed side by side at an axial interval on a plowing shaft, and a plurality of flanges are provided on each of the flanges around the plowing shaft. There is known a structure in which the plowing claws are radially arranged, and the plowing claws are fixed to the respective flanges with bolts and nuts.

[0003]

In the above structure, when the tilling claw is fastened and fixed to the flange by the bolt and nut, the bolt is rotated by simply tightening and rotating the nut with respect to the bolt. It is necessary to rotate the nut while pressing the bolt head with a wrench or wrench to prevent it from rotating, which makes the bolt and nut tightening operation troublesome, and moreover, there are multiple flanges. Since each of the plowing pawls is tightened with bolts and nuts, it requires a large amount of labor and labor to tighten the plowing pawls as a whole. There is a problem that it is not easy.

The present invention has been made in view of the above points, and the bolt can be securely stopped by simply inserting the bolt into the flange and the tilling claw, and the nut can be secured to the bolt. It can be easily tightened, and it is not necessary to hold the bolt with a spanner or wrench to stop it when tightening this nut, and it is easy to tighten the plowing pawl within the narrow space between each flange.
Moreover, it is possible to securely prevent the tightened bolts and nuts from loosening easily. Therefore, it is possible to greatly improve the operation of tightening the plowing pawl as a whole, and also to surely prevent loosening. The purpose is to provide a device.

[0005]

According to a first aspect of the present invention, there is provided a tillage claw attaching device, wherein a tillage shaft, a flange fixed to the tillage shaft, and a radial arrangement with respect to the flange centered on the tiller shaft. A plurality of plowing pawls attached by two bolts and nuts screwed to the bolts, and a washer body that is abutted to each plowing pawl and attached to the flange by the bolts and nuts, The washer body has an abutting plate portion that comes into contact with the tilling claw, and the abutting plate portion is formed with insertion holes through which the two bolts are inserted, respectively. A rotation blocking portion for blocking the rotation of the bolt heads of the two bolts is formed.

According to a second aspect of the invention, in the apparatus according to the first aspect, the opening edge portion of each insertion hole of the washer body is elastically deformable in the insertion direction of the bolt. It is a thing.

[0007]

In the apparatus for mounting a tilling claw according to the first aspect of the present invention, each tilling claw is arranged on the flange, and each washer is brought into contact with each tilling claw, and each through hole of each washer is inserted. When the two bolts are inserted deeply into the tilling claws and the flanges, the bolt heads of the two bolts are brought into contact with the rotation preventing portions of the washers.

Then, the nuts are respectively tightened with respect to the two bolts protruding outward of the flange on the side opposite to the respective washers, so that the plowing claws can be attached to the flange with the two bolts and nuts. It is fixed by tightening, but at this time, 2
Even if the nuts are respectively rotated and tightened with respect to the two bolts, the bolt heads of these two bolts are kept in contact with the rotation preventing portions of the respective washers, and the rotation is blocked and the rotation is prevented. Thus, the nut is reliably rotated with respect to the two bolts, so that each plowing pawl is easily fastened and fixed to the flange by the two bolts and nuts.

According to a second aspect of the present invention, there is provided a tillage claw attaching device according to the first aspect, wherein when the nuts are respectively rotated and tightened with respect to two bolts, the two tillers are provided. Is strongly tightened in the bolt insertion direction, and the opening edge portions of the respective insertion holes of the washer body are elastically deformed in the bolt insertion direction by the bolt heads of the two bolts. Therefore, the nut fastened to the two bolts is reliably prevented from loosening by the repulsive force of the opening edge of each elastically deformed insertion hole.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of an embodiment of the present invention will be described below with reference to the drawings.

1 to 3, reference numeral 1 denotes a machine frame, which has a hollow pipe-shaped main frame 2 elongated in the left-right direction,
The transmission case 3 and a bracket (not shown), which are arranged opposite to each other, are integrally fixed to both ends of the main frame 2, respectively. Further, a mission 5 is provided at an intermediate portion of the main frame 2 in the left-right direction so as to rotatably project the input shaft 4 forward. A rotary work body 6 is rotatably mounted between the lower ends of the transmission case 3 and the bracket.

The rotary work body 6 has a cultivating shaft 7 rotatably mounted between the lower ends of the transmission case 3 and the bracket, and the cultivating shaft 7 has a large number of axially spaced intervals. Flange 8 is integrally fixed. Each of the flanges 8 is formed in a disk shape, and a plurality of sets each including two mounting holes 9 for mounting a tilling pawl, which will be described later, are formed separately from each other on a peripheral side portion thereof. Further, for each of the flanges 8, a plurality of plowing claws centering on the plowing shaft 7 are provided.
10 are respectively arranged in a radial pattern, and communication holes 11 that communicate with the two mounting holes 9 of each set of the flanges 8 are formed at the base end portion 10a of each of the plowing claws 10.

Further, each plowing claw on each of the flanges 8
A washer body 12 is in contact with a base end portion 10a having two communication holes 11 of the ten. Each of the washers 12 has an abutting plate portion 13 that abuts the base end portion 10a of each of the plowing claws 10.
Insertion holes 14 that communicate with the two communication holes 11 of each of the plowing pawls 10 and the two mounting holes 9 of each of the sets of the flanges 8 are formed at a distance from each other, and the abutting plate portion 13 is formed. A plate-shaped rotation blocking portion 15 that rises up from the contact plate portion 13 at a substantially right angle is integrally formed at one end in the width direction of the contact plate portion 13 along the length direction of the contact plate portion 13.

Further, 16 is a bolt which is inserted into each mounting hole 9 of each flange 8 and the communication hole 11 of each plowing pawl 10,
At one end of the bolt 16, a rotation-preventing portion for the washers 12 is provided.
A bolt head 17 that comes into contact with 15 and is prevented from rotating is integrally formed in a polygonal shape, and a thread groove 18 is formed on the outer peripheral portion of the other end of the bolt 16, and the thread groove 18 is formed in the thread groove 18. A nut 20 is detachably screwed through a washer 19.

Then, each plowing claw 10 is attached to each flange 8.
Are arranged radially around the cultivating shaft 7, and the washer bodies 12 are respectively brought into contact with the base end portions 10a of the respective cultivating claws 10, and the respective cultivating claws are inserted from the respective through holes 14 of the respective washer bodies 12.
When two bolts 16 are inserted deeply into each of the communication holes 11 of the base end portion 10a of 10 and each of the mounting holes 9 of the flange 8, the bolt heads of the two bolts 16 are inserted deeply.
17 is brought into contact with the rotation preventing portion 15 of each washer body 12.

Further, the nuts 20 are respectively tightened to the screw grooves 18 of the two bolts 16 projecting outward of the flange 8 on the side opposite to the respective washers 12 by means of the washers 19. Each plowing pawl 10 is fastened and fixed to the flange 8 with the bolt 16 and the nut 20 fastened to the two bolts 16.

At this time, the nut 20 for the two bolts 16
Even when they are respectively rotated and tightened, the bolt heads 17 of the two bolts 16 are kept in contact with the rotation preventing portions 15 of the respective washers 12 while being prevented from rotating and prevented from rotating. The nut 20 is reliably rotated with respect to the two bolts 16, so that each plowing pawl 10 can be easily attached to the flange 8 by the two bolts 16 and each nut 20 screwed to the bolt 16. It is fastened and fixed.

Two bolts 16 and nuts 20 are used to attach one plowing claw 10 to the flange 8.
In this case, when the nut 20 is rotated with respect to the one bolt 16 inserted through the one mounting hole 9 of the flange 8 and the one communicating hole 11 of the tilling claw 10, the other mounting hole 9 of the flange 8 is used. Since the other bolt 16 is inserted through the other communication hole 11 of the cultivating claw 10 and the other bolt 16, the nut is attached to the one bolt 16.
Bolt head of one bolt 16 by tightening 20
Even if the washer body 12 is about to be rotated at 17 via the rotation preventing portion 15, this washer body 12 is prevented from being rotated by the other bolt 16, so that the nut 20 for the two bolts 16 is prevented. The tightening is easy, and it is not necessary to press the bolt head 17 of the bolt 16 with a spanner or a wrench when tightening the nut 20.

In this way, each flange 8 of the cultivating shaft 7 is
For this, a plurality of each tillage claw 10 can be easily and easily attached.

The projecting end of the tilling shaft 7 projecting into the lower end of the transmission case 3 is interlocked with the mission 5 through the output shaft of the mission 5 and the interlocking medium in the transmission case 3, The rotary work body 6 is rotationally driven by the output from the mission 5. In the figure, 21 is a cover body covering the upper part of the rotary work body 6, 22 is a grounding body located at the rear part of the rotary work body 6 and rotatable in the vertical direction, and 23 is It is a connecting frame for connecting to a tractor (not shown).

Next, in the above-mentioned embodiment, the case where the rotation blocking portion 15 for blocking the rotation of the bolt head 17 is formed in a substantially right angle shape along one end of the washer body 12 in the width direction has been described. Not limited to this, the rotation blocking portion 15 is formed, for example, as shown in FIGS. 4 and 5, at an intermediate portion in the length direction of the contact plate portion 13 of the washer body 12, that is, at both side portions thereof. It may be formed between the through holes 14.

In this case, in the embodiment shown in FIG. 4, the rotation preventing portion 15 is provided at both end portions of the rotation preventing body 24 which is formed by curving upward in an arc shape with respect to the contact plate portion 13. It was formed. Further, in the embodiment shown in FIG. 5, the rotation blocking portion 15
Are formed at both ends of a rectangular rotation blocking body 25 integrally fixed to the contact plate portion 13.

According to each of these embodiments, the rotation blocking body 24
The bolt heads 17 of the bolts 16 inserted into the through holes 14 on both sides by the rotation blocking portions 15 at both ends and the rotation blocking portions 15 at both ends of the rotation blocking body 25 in the same manner as in the above embodiment. Rotation is reliably prevented, and the nut 20 can be simply and easily fastened to each of these bolts 16.

Next, in the embodiment shown in FIGS. 6 and 7, the opening edge portions 26 of the insertion holes 14 formed on the contact plate portion 13 of the washer body 12 on both sides are directed in the insertion direction of the bolt 16. It is formed to be elastically deformable. In this case, the washer body 12 is formed of an elastic member, and the opening edge portions 26 of the insertion holes 14 on both sides of the washer body are formed to bulge annularly in the direction opposite to the insertion direction of the bolt 16.

Then, the nuts 20 are respectively fastened to the two bolts 16 inserted into the insertion holes 14 on both sides, so that the bolt heads 17 of the two bolts 16 insert the holes on both sides. The opening edge portion 26 of 14 is elastically deformed in the insertion direction of the bolt 16.

With this structure, the two bolts 16 are driven by the repulsive force of the opening edge portions 26 of the insertion holes 14 on both sides.
The nut 20 fastened to the shaft is prevented from loosening. Also in this case, as in the case of the above-described embodiment, the rotation preventing portion of the contact plate portion 13
The rotation of the bolt heads 17 of the two bolts 16 is blocked at 15, and the nut 20 is simply and easily fastened to the two bolts 16.

Next, in the embodiment shown in FIGS. 8 and 9, in the washer body 12, the rotation preventing portions 15 are provided so as to face each other at both ends of the abutting plate portion 13 in the longitudinal direction. Insertion holes 14 are formed on both sides between the rotation preventing portions 15 on both ends, and the opening edge portions 26 of the insertion holes 14 on both side portions are elastically deformable in the insertion direction of the bolt 16. Is.

In this case, the opening edge portions 26 of the insertion holes 14 on both sides are formed.
Forms a kerf 27 at a position opposed to the opening edge 26,
The opening edge portion 26 is formed as an elastic piece 28 that is cut and raised from the opposing cut groove 27 in a direction opposite to the insertion direction of the bolt 16.

Then, the nuts 20 are respectively fastened to the two bolts 16 inserted into the insertion holes 14 on both sides, so that the bolt heads 17 of the two bolts 16 insert the holes on both sides. The opposing elastic pieces 28 formed on the opening edge portions 14 of 14 are elastically deformed in the insertion direction of the bolt 16.

With this structure, the nuts 20 fastened to the two bolts 16 are prevented from loosening due to the repulsive force of the elastic pieces 28 facing the opening edge portions 26 on both sides. Also in this case, as in the case of the above-mentioned embodiment, the bolt heads of the two bolts 16 are provided at the rotation preventing portions 15 at both ends of the contact plate portion 13.
The rotation of 17 is blocked and the nut 20 is
Is easily and easily fastened.

[0031]

According to the invention of claim 1, the washer body has an abutment plate portion that abuts against the tilling claw, and the abutment plate portion is formed with insertion holes through which two bolts are respectively inserted. Since the rotation blocking portion for blocking the rotation of the bolt heads of the two bolts is formed in the contact plate portion, the bolt is inserted into the flange and the tilling claw at the rotation blocking portion of the washer body. The bolt can be securely stopped with just this, and the nut can be easily tightened against this bolt, and it is necessary to hold the bolt head with a spanner or wrench to stop the nut from turning. In addition, the operation of tightening the tilling pawls within the narrow space between the flanges is easy, and the structure thereof is simple, and therefore the operation of tightening the tilling pawls can be greatly improved as a whole.

According to the second aspect of the present invention, since the opening edge portion of each insertion hole of the washer body is formed so as to be elastically deformable in the insertion direction of the bolt, tightening is performed at the opening edge portion of each insertion hole. It is possible to securely prevent the bolts and nuts from loosening easily, and it is possible to securely prevent the bolts from rotating and loosening with a simple structure.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a tillage claw attaching device showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line a-a of the above.

FIG. 3 is a side view of the same tillage device.

FIG. 4 is a perspective view showing a washer body of another embodiment.

FIG. 5 is a perspective view showing a washer body of another embodiment.

FIG. 6 is a perspective view showing a washer body of another embodiment.

FIG. 7 is a sectional view taken along line b-b of the above.

FIG. 8 is a plan view showing a washer body according to still another embodiment.

FIG. 9 is a sectional view taken along line c-c of the above.

[Explanation of symbols]

 7 Tilling shaft 8 Flange 10 Tilling claw 12 Washer body 13 Abutment plate portion 14 Insertion hole 15 Rotation blocking portion 16 Bolt 17 Bolt head 20 Nut 26 Opening edge portion

Claims (2)

[Claims] 1. A cultivating shaft, a flange fixed to the cultivating shaft, two bolts radially arranged around the cultivating shaft with respect to the flange, and a nut screwed to the bolt. A plurality of tillage claws to be attached, and a washer body abutting on each of the tillage claws and attached to the flange with the bolt and the nut, the washer body contacting the tiller claws. Has a contact plate part,
Insertion holes for inserting the two bolts respectively are formed in the contact plate portion, and a rotation preventing portion for preventing rotation of the bolt heads of the two bolts is formed in the contact plate portion. Cultivating claw attachment device characterized by. 2. The tillage claw attachment device according to claim 1, wherein an opening edge portion of each insertion hole of the washer body is elastically deformable in a bolt insertion direction.