JP2003274705A - Plow width-adjusting device of rotary plowing part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To change a plow width of a rotary plowing part installed at the lower end part of a transmission case by a claw-mounting bracket and a spacer. <P>SOLUTION: This rotary plowing part by installing a plowing shaft 20 as protruding from the lower end part of the transmission case 10 in its side direction, fixing a flange 21 for mounting the claw at the plowing shaft 20 and mounting a plural number of plowing claws 22 at the outer circumferential part of the claw-mounting flange 21 in the radial direction by a prescribed interval through the claw-mounting bracket 21a is provided by (1) making the plowing width of the plowing claws 22 changeable by the claw-mounting bracket 21c with the spacer and the spacer 21e, and (2) making the claw-mounting bracket 21c with the spacer as freely demountable against the claw-mounting flange 21 and by utilizing a hexagonal hole formed on the claw-mounting bracket 21c with the spacer, fixing the claw-mounting bracket 21c with the spacer, spacer 21e and plowing claw 22 at the claw-mounting flange 21. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for adjusting a tillage width of a rotary tiller, wherein a tiller width of a rotary tiller provided at a lower end portion of a transmission case can be changed by a pawl mounting bracket and a spacer.

[0002]

2. Description of the Related Art Conventionally, a cultivating shaft is provided on both left and right sides from a lower end of a transmission case, and a pawl mounting flange is fixed to the cultivating shaft. A pawl mounting bracket is provided on an outer peripheral portion of the pawl mounting flange. A rotary tiller, such as a middle tillage rotor, is known in which a plurality of tillers are mounted at predetermined intervals in the radial direction.

In the above-mentioned medium tillage rotor, it is sometimes desired to change the tilling width (working width). In such a case, the tilling shaft was replaced with the pawl mounting flange to change the tilling width. For this reason, troublesome work is required.

[0004]

As described above, in the conventional medium tillage rotor, the tilling shaft and the nail mounting flange are replaced in order to change the tilling width by the tilling claw, which is troublesome. . For this reason, there has been a demand for a technique capable of easily and easily changing the tilling width without replacing the tiller shaft with the pawl mounting flange.

The present invention has been made for the purpose of solving the above-mentioned problems, and in particular, a rotary tiller which makes it possible to easily and easily carry out a change in the tilling width of a middle tillage rotor without replacing the tiller shaft. An attempt is made to provide a section width adjusting device.

[0006]

In order to achieve the above object, the present invention is characterized by having the following configurations (claims 1 and 2). A. A cultivating shaft is projected laterally from the lower end of the transmission case, a pawl mounting flange is fixed to the cultivating shaft, and a plurality of cultivating pawls are radially provided on the outer peripheral portion of the pawl mounting flange via a pawl mounting bracket. In the rotary tiller mounted at a predetermined interval, the tiller width of the tiller can be changed by the spacer-attaching pawl mounting bracket and the spacer.

B. The pawl mounting bracket with spacer is made detachable from the pawl mounting flange, and the hexagonal hole formed in the pawl mounting bracket with spacer is used to
The claw mounting bracket, spacer, and tillage claw are fixed to the claw mounting flange.

[0008]

With the above construction, the tilling width adjusting device for the rotary tiller of the present invention has the following actions. a. By making it possible to change the tilling width of the tilling claws by the pawl mounting bracket with spacers and the spacer, the tilling width of the rotary tiller can be changed without removing the tiller shaft. Moreover, the operation for changing the plowing width can be performed easily and easily.

B. The claw mounting bracket with spacer can be attached to and removed from the claw mounting flange, and the hexagonal hole formed in the claw mounting bracket with spacer can be used to fix the claw mounting bracket, spacer, and cultivating claw to the claw mounting flange. The change of the plowing width of the rotary tiller can be easily and quickly performed by the attaching / detaching operation using the mounting bolt.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be specifically described below with reference to the accompanying drawings. 1 to 3, reference numeral 1 denotes a rotary tiller (agricultural working machine), and the rotary tiller 1 is a main body frame 2 made of a hollow pipe having a substantially square cross section that extends in a horizontal direction orthogonal to the traveling direction of the machine body. In contrast, three work units 3C, 3L, 3R
Work (cultivation) units 3 provided with are arranged at a predetermined interval, of which the central working unit 3C is attached at the central position in the longitudinal direction of the main body frame 2,
The right side working unit 3R and the left side working unit 3L have fixing / unfixing bolts 4a and are fitted and inserted on the outside of the main body frame 2 to be attached to the sliding / fixing metal fittings 4 having a substantially square cross section which can be slid / fixed. Has been. Therefore, the distance between the right working unit 3R and the left working unit 3L can be adjusted by sliding the right and left along the main body frame 2 with the central working unit 3C.

A top mast 5 connected to the top link of a tractor (not shown) and a pair of lower link connection parts connected to the lower links of the tractor on both sides of the top mast 5 from the central portion in the longitudinal direction of the body frame 2 toward the front side. And 6 are provided. A gear box 7 is provided on the rear side of the body frame 2.
The outer transmission shaft 8 extends along the main body frame 2 from the gear box 7 to the left and right sides, one of which is the transmission / support case 10 of the central working unit 3C.
Power is transmitted through the base end of the. Outer transmission shaft 8
Has a hexagonal cross section and a hollow shape.
The square inner transmission shafts 9 are slidably inserted in the axial direction, and the tips of both the inner transmission shafts 9 are located at the right working unit 3
It is fitted to the base end portions of the transmission and support case 10 of the R and left side working unit 3L. The outer peripheries of the outer transmission shaft 8 and the inner transmission shaft 9 are covered by a transmission shaft cover 11 so that they can expand and contract. Two input parts 7 from the gear box 7 to the front side
a and 7b are installed in parallel, and the PTO of the tractor is installed in either of them.
Power is transmitted from the shaft.

The base end portion of the transmission and support case 10 of the central working unit 3C is supported so as to be rotatable forward and backward with respect to the main body frame 2 about the transmission shaft center 10a, and the right working unit 3R and the left working unit are also supported. The base end portion of the 3L transmission / support case 10 is supported by the sliding / fixing metal fitting 4 so as to be rotatable back and forth about the transmission shaft center 10a. In the central working unit 3C, between the bracket 2a protruding rearward from the main body frame 2 and the transmission / support case 10, and in the right working unit 3R and the left working unit 3L, sliding / fixing metal fittings are provided. Bracket 4b projecting rearward from 4 and transmission and support case 1
A compression rod 12 is interposed between each of them and 0. And each work unit 3C, 3R, 3L
Even if there is unevenness in the field during the work, the spring action of the compression rod 12 follows the unevenness.

At the outer end of the sliding / fixing metal fitting 4, a supporting member 13 is vertically provided so as to extend downward.
The gauge wheel holder 14 and the stand holder 15 are attached. The stand holder 15 projects laterally from the gauge wheel holder 14, but the right working unit 3
It is located inside the lateral width of R and the left working unit 3L. Then, the gauge wheel holder 14 supports a gauge wheel 16 which is a device for adjusting the working depth of each of the working units 3C, 3R, 3L by using a vertical movement grip 16a so as to be vertically adjustable. A stand 17 is detachably supported by the stand holder 15, and the front and rear casters 18 are provided on the stand 17. Then, with the stand 17 supported by the stand holder 15, the rotary tiller 1 is attached to and detached from the tractor almost automatically. In addition, the rotary tiller 1 is a caster 1
8 to move it alone and store it in a warehouse, or to load and unload it on a carrier via a scaffolding board.

The transmission / support case 10 of each of the work units 3C, 3R, 3L has a chain transmission system provided therein, and as shown in FIG.
Since the plow rotor is attached to the lower end portion thereof, the sliding / fixing metal fitting 4 and the main body frame 2 supporting the working units 3C, 3R, 3L are subjected to a clockwise turning load in FIG. To alleviate this load, a support frame 19 is arranged along the body frame 2 and abuts the lower edges of the brackets 2a and 4b. Drive shafts 20 are provided on the left and right sides of the lower end of the transmission / support case 10, and circular pawl mounting flanges 21 are fixedly mounted on the drive shaft 20.
Six claws 22 are attached to the claw mounting flange 21 at equal intervals in the radial direction with respect to the claw mounting bracket 21a having a hexagonal hole fixedly mounted on the claw mounting flange 21 at equal intervals in the radial direction. It constitutes the rotor.

Further, as shown in FIGS. 4 to 6, in the present invention, a spacer mounting claw mounting bracket 21c having a hexagonal hole and a plowing width adjusting spacer 21e are provided. Then, the claw mounting bracket with spacer 21
As shown in FIGS. 4 and 6, c is a plowing pawl mounting screw 2 through a hexagonal hole with respect to the pawl mounting bracket 21a.
1b, and also fixed to the pawl mounting flange 21 with the spacer mounting pawl mounting bracket mounting screw 21d, the plowing width of the tilling pawl 22 is changed. This plowing width is
It can be changed by changing the thickness of the spacer of the claw mounting bracket 21c with a spacer or by interposing a spacer 21e for adjusting the working width between the claw mounting bracket 21c with a spacer and the claw mounting flange 21. it can. Claw mounting bracket with spacer 21
When attaching c to the claw mounting bracket 21a, a claw mounting space spacer 21f is interposed so as not to damage the claw mounting bracket 21a.

On the front side of the lower end portion of the transmission / support case 10, a residual tillage treatment blade 23 consisting of a vertical blade and a horizontal blade is attached so as to treat the residual tillage below the transmission / support case 10. The horizontal blade of the residual tillage treatment claw 23 is at the lower end of the vertical blade,
It has a rake face and is provided with a soil reversal action face formed on the rear side in the traveling direction of the machine body. In addition, the residual tillage treatment nail 2
The soil inverting action surface of the horizontal blade 3 is formed by extending the rear end of the horizontal blade rearward and bending it upward.

The upper part of the middle tillage rotor is covered from the center by left and right upper covers 24, 24, side covers 27, 27, and front and rear front and rear covers 30, 31. The upper covers 24, 24 have hinges 25, 2 provided at the center thereof.
It is possible to rotate to the left and right via 5, and the operation is selected by adjusting the rotation angle of the tillage work and the tillage / cultivation work. The angle can be adjusted in a plurality of stages by the cover angle adjusting device 26. The side covers 27, 27 are rotatably supported on the outer ends of the upper covers 24, 24 via hinges 28. The turning adjusters are provided at the ends of the turning shafts of the hinges 28. By 29, the turning angles of the side covers 27, 27 can be adjusted steplessly. The front and rear covers 30 and 31 have their base ends attached to the rear ends of the upper covers 24 and 24, and are vertically rotated as the upper covers 24 and 24 are rotated and adjusted.

Next, the operation of the rotary tiller 1 having the above structure will be described. When attaching or detaching the rotary tiller 1 to or from a tractor (not shown), the stand holder 1
When the stand 17 is supported on the stand 5, it can be attached and detached almost automatically. Also, the rotary tiller 1
Can be moved individually by the caster 18, and can be stored in a warehouse or can be unloaded on a carrier via a scaffolding board. The stand 17 is detached from the stand holder 15 when the rotary tiller 1 works. Loosen the fixing / fixing release bolts 4a and slide the sliding / fixing metal fittings 4 in accordance with the ridge spacing of the crop row to move the work units 3R, 3
Move L left and right to set an appropriate work interval. In the working unit 3, the middle tillage rotor performs the middle tillage work of a predetermined width, and the portion of the lower portion of the transmission / support case 10 that is left tillage is cultivated by the horizontal blade of the tillage treatment claw 23 and is finished evenly. . Further, when adjusting the tilling width of the middle tillage rotor, it can be easily performed by attaching and detaching the spacer-attached claw mounting bracket 21c and the tiller width adjusting spacer 21e.

When adjusting the working depth of the working units 3C, 3R, 3L, the gauge wheel 16 is moved up and down along the gauge wheel holder 14 and fixed. When only the tillage work is performed by the work units 3C, 3R, 3L, the left and right upper covers 24, 24, the side covers 27, 27, the front and rear front and rear covers 30, are provided above the tillage rotor as illustrated. Work with 31 covered. When cultivating soil for the crop plant, cover angle adjustment device 2
6, the upper covers 24, 24 are rotated around the hinge 25 to adjust the angle upward. Also, the side cover 2
In the case of Nos. 7 and 27, the hinge 28
The turning angle can be adjusted upwards steplessly via. When the angles of the upper covers 24, 24 are adjusted, the front and rear covers 30, 31 are interlocked and rotationally adjusted.

[0020]

As described above, the apparatus for adjusting the tilling width of the rotary tiller according to the present invention has the following effects by having the configurations of claims 1 and 2. ． Since the plunge width of the tilling claw can be changed by the pawl mounting bracket with the spacer and the spacer, the tilling width of the rotary tiller can be changed without removing the tiller shaft. Moreover, the operation for changing the tilling width can be performed easily and easily.

[0021]. Claw mounting bracket with spacer
It is detachable from the pawl mounting flange, and the hexagonal hole formed in the pawl mounting bracket with spacer is used to fix the pawl mounting bracket, spacer and cultivating pawl to the pawl mounting flange. Change the plowing width of the part by simply attaching and detaching the mounting bolts.
It can be performed easily and in a short time.

[Brief description of drawings]

FIG. 1 is a rear view of an agricultural working machine according to the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a partial plan view of the same.

FIG. 4 is a rear view of a tilling rotor according to the present invention.

5A is a plan view of a claw mounting bracket with a spacer according to the present invention, FIG. 5B is a front view of the same, FIG. 5C is a plan view of a claw mounting space spacer, and FIG. FIG.

FIG. 6 is a side view of the tilling rotor.

[Explanation of symbols]

1 Rotary Cultivator (Agricultural Working Machine) 2 Main Frame 2a Bracket 3 Working (Cultivating) Unit 3C Central Working Unit 3R Right Working Unit 3L Left Working Unit 4 Sliding / Fixing Bracket 4a Fixing / Unlocking Bolt 4
b bracket 5 top mast 6 lower link connecting portion 7 gear box 7a, 7b input portion 8 outer transmission shaft 9 inner transmission shaft 10 transmission / support case 10a transmission shaft center 11 transmission shaft cover 12 compression rod 13 support member 14 gauge wheel holder 15 Stand holder 16 gauge wheel (working depth adjustment device) 16a
Vertical movement grip 17 Stand 18 Caster 19 Support frame 20 Drive shaft 21 Claw mounting flange 21a Claw mounting bracket (fixed) 21b Tilling claw mounting screw 21c Spacer claw mounting bracket (detachment) 21d Spacer claw mounting bracket mounting screw 21e Cultivation width adjustment Spacer 21f Claw mounting space spacer 22 Middle tillage claw 23 Remaining tillage processing blade 23a Vertical blade 23b Horizontal blade 24 Upper cover 25, 28 Hinge 26 Cover angle adjusting device 27 Side cover 29 Rotation adjusting tool 30, 31 Front / rear part cover

Claims (2)

[Claims] 1. A cultivating shaft is provided laterally from the lower end of the transmission case, and a pawl mounting flange is fixed to the cultivating shaft, and a plurality of pawl mounting brackets are provided on the outer peripheral portion of the pawl mounting flange via a pawl mounting bracket. A rotary plowing unit for a rotary plowing part, wherein the plowing width of the plowing pawl can be changed by a pawl mounting bracket with a spacer and a spacer in the rotary plowing part where the plowing pawls are mounted at predetermined intervals in the radial direction. 2. The pawl mounting bracket with a spacer is attachable to and detachable from the pawl mounting flange, and the hexagonal hole formed in the pawl mounting bracket with a spacer is used to attach the pawl mounting bracket, the spacer and the tilling pawl to the pawl mounting flange. 2. The apparatus for adjusting the tillage width of a rotary tiller according to claim 1, wherein the tiller is fixed to the tiller.