JP3247835B2 - Tillage claw mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilling claw mounting device, and more particularly to a tilling claw mounting device for mounting a plurality of tilling claws of a rotary tilling body for tilling a field.

[0002]

2. Description of the Related Art Conventionally, as this type of tilling claw mounting device, as described in Japanese Patent Application Laid-Open No. Hei 6-335302, a plurality of tilling claws are radially arranged on a flange of a tilling shaft. A washer plate having a rotation preventing portion of a bolt head is brought into contact with each tilling claw, and two bolts are inserted into each tilling claw and flange from each washer plate, and the bolt head of each bolt is inserted into the tilling claw and the flange. There is known a configuration in which a nut is fastened to each of the bolts in a state in which the plurality of tilling claws are radially protruded from a flange in a state of being in contact with the rotation preventing portion.

[0003]

In the configuration described in the above-mentioned publication, when the nut is tightened and rotated by the bolt, the nut head is brought into contact with the rotation preventing portion of the washer plate to prevent the nut from rotating. Since it is tightened, there is no need for a detent operation to hold the bolt head on the opposite side of this nut, but at the beginning of the nut tightening operation, insert two bolts one by one into the washer plate. Since the nut is shallow and the bolt can move forward and backward with respect to the washer and is rotatable, the bolt head is easily disengaged from the rotation preventing portion, and the length of the bolt is small. Depending on the bolt, the bolt may run idle.Therefore, it is necessary to press and hold the bolt head in contact with the rotation prevention part until the nut is tightened to some extent. In some cases, the same operation is required when detaching, and the rotation preventing portion is formed by bending the washer plate, by forming an arc-shaped curve, or by attaching a separate rotation preventing portion to the washer plate. There is a problem that the structure of the washer plate tends to be complicated, such as to fix

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a simple structure in which a bolt can be securely fixed to a washer, a tilling claw can be easily attached and detached, and a nut to be fastened to the bolt is provided. It is an object of the present invention to provide a tilling claw mounting device that does not require a detent operation for pressing a bolt head on the opposite side and can reduce the work of attaching and detaching and replacing a tilling claw.

[0005]

Means for Solving the Problems] tilling claw mounting apparatus according to claim 1 is fixed and cultivating shaft, this tilling shaft, two one
A flange having a plurality of sets of claw mounting holes, a plurality of cultivating claws radially attached to the flange around the cultivation axis, and each of the plurality of cultivating claws via a washer body. And two nuts fixed to the nail mounting holes of the flange and nuts screwed to the two bolts, wherein each of the tilling nails communicates with the nail mounting hole of the flange.
The base has a plate-like base end formed with two communication holes, and the washer has a pressing plate that abuts against a base end of each of the plowing claws, and is provided on both sides of the pressing plate. An insertion hole through which each of the two bolts is inserted is opened. The two bolts are formed integrally with a bolt shaft inserted through the insertion hole of the pressing plate and one end of the bolt shaft. as well as have a large-diameter bolt head abuts the opening edge of the insertion hole of the plate, the pressing plate to the outer peripheral portion of the bolt shaft at one end of the bolt shaft proximate to said bolt head A knurled shaft portion formed with an axial knurl protruding slightly larger than the inner diameter of the insertion hole , and the other end of the bolt shaft has the nut
A threaded shank for screwing the door, by press-fitting the crimping a knurled shaft portion of the two bolts in the insertion hole of the side portions of the pressing plate from the axial direction, on both sides of the washer body The two bolts are respectively fixed integrally, and the seat is
Two bolts integrally fixed to both sides of the metal body
From the two communication holes at the base end of the tine,
By simultaneously inserting the two claw mounting holes
The pressing plate of the washer having the two bolts
Abutting against a base end of a tillage claw;
The screw shaft protruding from the claw mounting hole of the
By tightening the nut, the pressing plate of the washer
The base end of the tilling claw is clamped between the flange and the flange.
Is held.

[0006] The base end of each tilling claw is provided for each claw mounting portion of the flange, and both sides of the washer are provided from the base end of each tilling claw to each claw mounting portion of the flange. By inserting the two bolts respectively fixed to the base plate, the pressing plate of the washer having the two bolts is brought into contact with the base end of each tilling claw.

Also, nuts are screwed into two bolts protruding outwardly of the flanges on the opposite side of the washer, respectively, and tightened. The base end of the claw is pressed toward the flange, and the base end of each tilling claw is clamped and clamped between each pressing plate and the flange. Then, a plurality of tillage claws are radially attached to the flange.

In this case, the knurled shafts of the two bolts are press-fitted from the axial direction into the insertion holes on both sides of the pressing plate and are integrally prevented from rotating, so that a nut is attached to the two bolts. Even if they are strongly tightened, these two bolts do not rotate, and there is no need to hold down each bolt head, and nuts are strongly tightened against these two bolts, respectively, and the base end of each tilling claw Each part is easily pinched and fixed.

In addition, each bolt has a bolt head that comes into contact with the opening edge of the insertion hole on both sides of the pressing plate,
When the knurled shaft of each bolt is press-fitted from the axial direction into the insertion holes on both sides, it is securely prevented from coming off at the bolt head, and the knurled shaft of each bolt is inserted into the insertion holes on both sides. Is fixed at a predetermined position.

According to a second aspect of the present invention, there is provided the tilling claw mounting device according to the first aspect, wherein the insertion hole of the pressing plate includes:
It has an annular fastening portion in which an opening edge opposite to the bolt insertion direction is caulked to a knurled shaft portion of the bolt inserted through the insertion hole.

Then, the knurled shaft of the bolt is more firmly fixed to the insertion hole of the pressing plate by the annular fastening portion.

According to a third aspect of the present invention, there is provided the tilling nail mounting device according to the first or second aspect, wherein the pressing plate comprises:
It has a display portion for displaying the size and the like of the bolt on the surface portion located between the insertion holes on both sides.

[0013] Then, the size of the bolt and the like are confirmed on the display portion, and the size corresponding to the size of the flange and each tilling claw is determined.
A washer having bolts is selectively used.

[0014]

An embodiment of the present invention will be described below with reference to the accompanying drawings.

Reference numeral 1 denotes a machine frame of an agricultural machine. The machine frame 1 includes a main frame 2 in a left-right direction, a transmission case 3 and a bracket (not shown) fixed to both ends of the main frame 2. ). A transmission 5 is provided at an intermediate portion of the main frame 2 so as to rotatably project the input shaft 4 forward.

Left and right lower arms 6 are integrally provided to project forward and downward from both sides of the main frame 2, and left and right lower pins 7 are respectively provided to project from leading ends of the left and right lower arms 6. ing. The mission 5
A mast 8 is integrally protruded upward and forward from the upper part of the
A connection hole 9 is formed at the tip of the mast 8, and the mast 8 and the left and right lower arms 6 are connected by a stay 10.

Reference numeral 11 denotes a rotary working body 11 rotatably mounted between lower ends of the transmission case 3 and the bracket.
The rotary working body 11 has a tilling shaft 12 rotatably mounted between lower ends of the transmission case 3 and the bracket, and the tilling shaft 12 is spaced apart from the tilling shaft 12 at a predetermined interval in the axial direction. A number of disc-shaped flanges 13 are integrally fixed.

In each of the flanges 13, a plurality of sets of claw mounting holes 15 each of which is a set of two for mounting a plurality of tilling claws 14 radially around the cultivating shaft 12 are formed separately at inner and outer portions. ing. Further, the plurality of tillage claws 14 have a plate-shaped base end portion 16 abutting on each of the flanges 13, and the base end portion 16 has a claw mounting hole in which two of the flanges 13 are set.
15 has two communicating holes 17 communicating with each other, and has a vertical cutting edge portion 18 extending continuously from the base end portion 16 and a curved horizontal cutting edge portion 19 at the distal end portion.

Reference numeral 20 denotes a base end 16 of the plurality of tillage claws 14.
Is fixed to the flange 13 in a detachable manner. The fixing tool 20 includes a metal washer 21, two metal bolts 22 attached to the washer 21, and the two bolts 22.
And a metal nut 24 which is detachably screwed through a washer 23.

The washer 21 is a base end of each of the tillage claws 14.
It has an elongated pressing plate 25 that abuts along 16
Insertion holes 26 through which the two bolts 22 are inserted are opened at both sides in the length direction of the bolt 25.
Are connected to the communication holes 17 at the base end 16 of each of the tilling claws 14, respectively.

The two bolts 22 are provided with a bolt shaft 27 inserted through insertion holes 26 on both sides of the pressing plate 25,
27 has a large-diameter bolt head 29 formed integrally with one end of the pressing plate 25 and in contact with the opening edge 28 of the insertion hole 26 on both sides of the pressing plate 25. Also, at one end of the bolt shaft 27 close to the bolt head 29, an axially projecting portion slightly larger than the inner diameter of the insertion hole 26 on both sides of the pressing plate 25 on the outer periphery of the bolt shaft 27 is provided. Knurled shaft 31 forming knurls 30
have. The other end of the bolt shaft 27 has a screw shaft portion 32 into which the nut 24 is screwed.

The bolt shaft of the two bolts 22
27 and the screw shaft portion 32 have outer diameters slightly smaller than the inner diameters of the insertion holes 26 on both sides of the pressing plate 25, and are formed so as to be able to be smoothly inserted into the insertion holes 26. It is formed with an outer diameter capable of being press-fit into the insertion holes 26 on both sides of the plate 25 in the axial direction. In addition, the bolt head 29 is formed in a polygonal shape with a size such that the bolt shaft 27 cannot be removed from the insertion holes 26 on both sides of the pressing plate 25.

Next, the two bolts are attached to the washer 21.
When connecting 22, insertion holes on both sides of the pressing plate 25
26, the two bolts 22 are inserted from the screw shaft portion 32, and the knurled shaft portions 31 of the two bolts 22 are forcibly press-fitted from the axial direction, respectively, so as to be inserted into the insertion holes 26 on both sides. The knurled shaft portions 31 of the two bolts 22 or one of them is plastically deformed and pressure-bonded, and the washer 21
The two bolts 22 are integrally fixed to both side portions of the.

The two bolts 22 are integrally fixed to both sides of the washer 21 so as not to be able to rotate and not to come off. The bolt heads 29 of the two bolts 22 are fixed to both sides. The two bolts 22 are more reliably held and supported by the bolt head 29 by being in contact with the opening edges 28 of the insertion holes 26, respectively.

The knurled shaft 31 of the two bolts 22 is forcibly pressed into the insertion holes 26 on both sides of the pressing plate 25, so that the two bolts 22 are inserted (press-fitted).
If the opening edges 28 of the insertion holes 26 on both sides are deformed on the opposite side to the direction, the screw shaft portions 32 of the two bolts 22 The jig 33 is inserted along the bolt shaft 27, and the opening edges 28 of the insertion holes 26 on both sides are pushed back by the annular pressing portion 34 protruding from the tip of the jig 33, and this opening edge 28 is crimped to the knurled shaft portion 31 as an annular fastening portion 35.

The annular fastening portion 35 of the insertion hole 26 on both sides and the knurled shaft portion 31 of the two bolts 22 are further securely pressed against each other, and the two bolts 22 are provided on both sides of the washer 21. Are fixed integrally so that they cannot rotate and cannot come off.

Next, on the surface of the pressing plate 25 of the washer 21, the length of the two bolts 22 located between the insertion holes 26 on the both sides, A display section 36 is formed to display the size of the two bolts 22, such as the pitch of the screw shaft section 32, the distance between the two bolts 22, and the like.

That is, the length and the interval of the bolts 22 for attaching the tilling claws 14 to the flange 13 differ depending on the model of the rotary work body 11 and the tilling claws 14, and various bolts 22 are provided to cope with these differences. The two bolts 22 are prepared as a set, and are fixed to both sides of the pressing plate 25 as a set, and the size of the two bolts 22 is displayed on a display portion 36 of the pressing plate 25, so that the rotary The fixing tool 20 according to the model of the work body 11 and the tillage claw 14 is easily selected. Therefore, the work of attaching the tilling claws 14 becomes easy.

Next, a rotary cover 37 covering the upper part of the rotary working body 11 is fixed between the transmission case 3 and the bracket. Also, at the rear end of the rotary cover 37, a leveling body 38 positioned at the rear of the rotary working body 11 for leveling the cultivated soil plowed by the rotary working body 11 is rotatable vertically. The terrain body 38 is pivotally supported, and is supported by a support rod 39 projecting rearward from the main frame 2 so as to be vertically adjustable in position.

Next, the operation of the above embodiment will be described.

The base ends 16 of the tilling claws 14 are provided for a plurality of sets of the claw mounting holes 15 each including two of the flanges 13, and both sides of the base end 16 of each of the tilling claws 14. Each of the tilling claws 14 from the communication hole 17 of the
By inserting the two bolts 22 on both sides of the washer 21 of the fastener 20 selected according to the above, the pressing plate 25 of the washer 21 having these two bolts 22 It abuts on the 14 base end 16.

The nuts 24 are screwed into the screw shaft portions 32 of the two bolts 22 protruding outward from the flange 13 on the opposite side of the washer 21 so as to be tightened. The base end of each tilling claw 14 with 21 pressing plates 25
16 is pressed against the flange 13 side, and the base end 16 of each tilling claw 14 is clamped between each pressing plate 25 and the flange 13.

Further, a plurality of fixing members are provided for each flange 13.
Similarly, the base end 16 of the plurality of tilling claws 14 using
By tightening each, the base end of each tilling claw 14
16 are clamped between the flanges 13 and the washers 21 of the fasteners 20, respectively. Then, a plurality of tillage claws 14 are fixed radially to each flange 13.

In this case, the knurled shaft portions 31 of the two bolts 22 are press-fitted from the axial direction into the insertion holes 26 on both sides of the pressing plate 25, and are integrally rotated by the annular fastening portion 35. Since the two bolts 22 of the pressing plate 25 are fixed by being stopped and fixed, the two bolts 22 of the tilling claw 14 are connected to the communication holes 17 on both sides of the base end 16 of the tilling claw 14 by flanges.
13 are simultaneously inserted into the respective claw mounting holes 15.

Further, even if the nuts 24 are strongly tightened to the two bolts 22, the two bolts 22 do not rotate, and it is not necessary to press down the bolt heads 29. The nuts 24 are strongly tightened with respect to the bolts 22, respectively, and the base ends 16 of the tilling claws 14 are easily tightened and fixed.

Each bolt 22 has a bolt head 29 which comes into contact with the opening edge 28 of the insertion hole 26 on both sides of the pressing plate 25, so that the knurl of each bolt 22 is inserted into the insertion hole 26 on both sides. When the shaft portion 31 is press-fitted and pressed from the axial direction, the bolt portion 29 is securely fixed to the bolt head 29 so that the bolt portion 29 is securely fixed. Fixed.

Thus, each flange 13 of the tilling shaft 12 is
When a large number of tilling claws 14 are fixed to each other, two bolts 22 for fixing each of the tilling claws 14 can be attached to each flange 13 from the base end 16 of each tilling claw 14 at the same time. Need not be installed one by one and therefore each flange
A plurality of tillage claws 14 are securely attached to the thirteen by a simple operation.

Next, in the above-described embodiment, the case where the bolt heads 29 of the two bolts 22 are formed in a polygonal shape has been described. It may be formed in a circular shape. That is,
The two bolts 22 have knurled shaft portions 31 through which the washers 21 are inserted.
Since the two bolts 22 are integrally fixed, when the nut 24 is tightened to the two bolts 22, it is not necessary to particularly press down the bolt head 29 with a spanner or the like to prevent the two bolts 22 from rotating. It is sufficient that the bolt head 29 of the bolt 22 has a larger diameter than the insertion hole 26 of the washer 21 and is prevented from falling off, and may be formed in a circular shape.

[0039]

According to the first aspect of the present invention, the washer is provided with an insertion hole for inserting two bolts on both sides of a pressing plate abutting against the base end of each tilling claw. slightly larger than the inner diameter of the insertion hole of the pressing plate in the two bolts outer periphery of the bolt shaft in proximity to the bolt head at one end of the bolt shaft inserted through the insertion hole of the pressing plate A knurled shaft portion having a protruding axial knurl is formed, and the knurled shaft portions of the two bolts are respectively press-fitted and pressed from the axial direction into the insertion holes on both side portions of the pressing plate. Since the two bolts are fixed together, the two bolts can be fixed securely to the washer with a simple structure, and the mounting and removing operations of the tilling claw are easy. Nut to tighten two bolts when attaching and detaching It does not require a detent operation to hold down the bolt head on the opposite side, reducing the work of attaching and removing tilling claws, and greatly improving overall workability by attaching multiple tilling claws to the flange. it can.

According to the second aspect of the present invention, the insertion hole of the pressing plate has an annular fastening portion in which the opening edge opposite to the bolt insertion direction is caulked to the knurled shaft portion of the bolt inserted into the insertion hole. With this configuration, the knurled shaft portion of the bolt can be more firmly and integrally fixed to the insertion hole of the pressing plate by the annular fastening portion.

According to the third aspect of the present invention, since the pressing plate has a display for displaying the size of the bolt on the surface located between the insertion holes on both sides, the surface of the pressing plate is utilized. In addition to displaying the size of the bolts by displaying the bolt size, the bolts can be easily selected and used at a glance according to the tilling claw to be attached to the flange, and the work of attaching the tilling claw can be simplified. it can.

[Brief description of the drawings]

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

FIG. 2 is a side view of the fixing device.

FIG. 3 is a cross-sectional view taken along line a-a of FIG.

FIG. 4 is an exploded side view of a part of the fixing device.

FIG. 5 is a sectional view showing a caulked state of the bolt.

FIG. 6 is a front view of the fixing device.

FIG. 7 is a side view of the agricultural working machine provided with the rotary working body.

FIG. 8 is a front view of a fixing device according to another embodiment.

[Explanation of symbols]

 12 Tilling shaft 13 Flange 14 Tilling claw 16 Base end 21 Washer 22 Bolt 24 Nut 25 Pressing plate 26 Insertion hole 27 Bolt shaft 28 Opening edge 29 Bolt head 30 Knurl 31 Knurl shaft 35 Ring tightening part 36 Display Department

Claims (3)

(57) [Claims] 1. A tilling shaft and a plurality of sets of jaws fixed to the tilling shaft
A flange having a hole; a plurality of tilling claws radially attached to the flange around the tilling axis; and a plurality of the respective tilling claws each in a claw mounting hole of the flange via a washer. Two bolts to be fixed and a nut screwed to the two bolts, wherein each of the tillage claws communicates with a claw mounting hole of the flange.
A plurality of communication holes, and the washer has a pressing plate in contact with a base end of each of the tilling claws. The two bolts are opened, and the two bolts are formed integrally with one end of a bolt shaft inserted into the insertion hole of the pressing plate and the pressing plate. as well as have a large-diameter bolt head abuts the opening edge of the insertion hole, the insertion hole of the pressing plate to the outer peripheral portion of the bolt shaft at one end of the bolt shaft proximate to said bolt head has a knurled shaft portion formed in the axial direction of the knurls of from the inner diameter protruding slightly greater, and the ball
The other end of the tilt shaft has a screw shaft for screwing the nut.
Then, the knurled shafts of the two bolts are press-fitted from the axial direction into the insertion holes on both sides of the pressing plate .
Ri, the two bolts are fixed integrally to both sides of the washer body, the two bolts which are integrally fixed to both sides of the washer body
From the two communication holes at the base end of the tilling claw,
Simultaneously insert into two sets of claw mounting holes
As a result, the pressing plate of the washer having the two bolts is moved forward.
The two bolts are in contact with the base end of the tilling nail and project from the nail mounting hole of the flange.
Tightening the nut to the screw shaft part
From the above, between the pressing plate of the washer and the flange
A tilling claw mounting device, wherein a base end of a tilling claw is clamped and pinched . 2. The insertion hole of the pressing plate has an annular fastening portion in which an opening edge opposite to the bolt insertion direction is caulked to a knurled shaft portion of the bolt inserted into the insertion hole. The tilling claw mounting device according to claim 1. 3. The tilling claw mounting device according to claim 1, wherein the pressing plate has a display portion for displaying a size of a bolt on a surface portion located between the insertion holes on both sides. .