JPH09107707A - Normal and reverse-rotating coaxial working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a working machine having a tilling tine placed near a transmission case to prevent the formation of a remaining untilled part under the transmission case, capable of smoothly discharging the mowed grass and soil backward by the normal rotation of the tilling tine and effective for suppressing a stacking phenomenon to cause the riding of the transmission case over the residual soil. SOLUTION: The 1st tilling shaft 47 is rotated in normal direction and the 2nd tilling shaft 46 is rotated in reverse direction by the action of a transmission case 41 of a working machine. Accordingly, the tilling tine 21 attached to the 1st tilling shaft 47 positioned close to the transmission case 41 is rotated in normal direction and the spiral rotor 90 attached to the 2nd tilling shaft 46 separated from the transmission case 41 is rotated in reverse direction. Since the tilling tine and the spiral rotor are rotated opposite to each other, the reactive forces are canceled with each other to reduce the load on the working vehicle and enable the reduction of the weight and size of the vehicle.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a working machine equipped with a spiral rotor.

[0002]

2. Description of the Related Art A spiral rotor is suitable for weeding in orchards and crushing topsoil. There are work machines that resemble spiral rotors. For example, Japanese Utility Model Publication No. 1-39126 "Tractor mid-mount mower mounting mechanism",
Japanese Unexamined Utility Model Publication No. 60-17606 "Tiller that doubles as a weeder"
Is a reel mower and is a weeding rotor.

According to FIG. 1 of the publication, the above is to arrange the left mower A, the rear mower C and the right mower B in the width direction of the tractor and mow the grass with a width of A + C + B. Since the rear mower C cannot be arranged under the vehicle body, it is pulled to the rear part of the vehicle body, and the other left and right mowers A and B are arranged on the left and right side portions of the vehicle body.

According to FIG. 1 of the above publication, the above is attached with a gear box 5 at the end of a long operation tube 1, and rotating shafts 9 and 10 are protruded from the gear box 5 to the left and right. It is a weeding machine in which rotors 11 and 11 are attached to 10.

[0005]

In the above, each of the left mower A, the right mower B and the rear mower C is driven, so that the drive system becomes complicated. Therefore, a large tractor is required, but since trees stand in the orchard, it is difficult to work with a large tractor, and a small working vehicle with a small turning space is required.

The above is very compact and can be used in orchards. However, since the grass in the central gear box 5 cannot be mowed, it is necessary to make many reciprocations, and the burden on the worker is extremely heavy.

[0007]

Means for Solving the Problems Accordingly, the present inventors have:
In order to reduce the burden on the worker, the spiral rotor is towed by a small work vehicle to eliminate uncut parts of the gearbox, and because the work vehicle is small, the reaction force of the spiral rotor is applied to this work vehicle. We have completed a working machine that can be hung up.

More specifically, the first aspect of the present invention is to extend a hollow first tillage shaft from the work implement mission case, and to penetrate the inside of the first tillage shaft so as to pass from the work implement mission case to the second tiller shaft. , Forward rotation of the 1st tillage shaft near the mission case, attach a tillage claw to this shaft, reversely rotate the 2nd tillage shaft far from the mission case, and attach a spiral rotor to this shaft. Configure the working machine.

Since the cultivating claw is arranged near the mission case, the uncultivated part under the mission case can be eliminated, and moreover, since the cultivating claw is rotated in the forward direction, the grass and soil cut can be smoothly discharged backward. It is possible to suppress the stack phenomenon where the mission case is mounted on the remaining soil. Since the plowing claw and the spiral rotor are reversed, the work reaction forces are offset, the load on the work vehicle is reduced, and the working vehicle can be reduced in weight and size. In addition, weeding can be carried out at a certain depth, which improves the appearance after weeding and improves the finish of weeding.

According to a second aspect of the present invention, the hollow first tiller shaft is extended from the work implement mission case, and the second tiller shaft is extended from the work implement mission case by penetrating the inside of the first tiller shaft. A spiral rotor is attached to the first tiller shaft near the case, a tiller claw is attached to the second tiller shaft far from the mission case, and the first tiller shaft and the second tiller shaft are rotated in reverse to each other, thereby providing a coaxial forward / reverse working machine. Make up.

Since the spiral rotor and the tilling claw are reversed, the work reaction forces are offset, the load on the work vehicle is reduced, and the working vehicle can be reduced in weight and size.
Since both sides of the mowing width are mowed by the plowing claws, the mowing width becomes clear, which is convenient when performing mowing on a wide field back and forth, and the working effect is improved.

According to a third aspect of the present invention, the hollow first tiller shaft is extended from the work implement mission case, and the second tiller shaft is extended from the work implement mission case by penetrating the inside of the first tiller shaft. A spiral rotor is attached to both the first cultivating shaft near the case and the second cultivating shaft distant from the mission case, and the first forward cultivating shaft and the second cultivating shaft are rotated in opposite directions to form a coaxial forward / reverse working machine.

Since the spiral rotor and the spiral rotor are reversed, the work reaction forces are offset, the load on the work vehicle is reduced, and the weight and size of the working vehicle can be reduced.

According to a fourth aspect of the present invention, the number of rotations of the first tillage shaft and the second tillage shaft are substantially the same.

Since the normal rotation speed and the reverse rotation speed are made substantially the same, the forward force and the backward force can be canceled well.

[0016]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of reference numerals. FIG. 1 is a side view of a work vehicle according to the present invention. The work vehicle 1 includes a front wheel 3 having a small diameter and a rear wheel 4 having a large diameter in front of and behind a body frame 2, a front weight 5 at a front end, and a front to rear side. Handle post 6, steering handle 7, passenger seat 8, prime mover 9 (cylinder head 11,
It has a muffler 12 and a fuel tank 13 at the top. ), And a work machine 20 having a spiral rotor at the rear part is detachably suspended, and is a relatively small and lightweight vehicle.

The working machine 20 is raised by a hydraulic cylinder (not shown), receives a driving force from the prime mover 9 via a transmission means, and appropriately rotates the spiral rotor 90 and the like in the forward and reverse directions. It will be described later.

Reference numeral 40 is a work machine mission device, which is a device for decelerating the driving force of the prime mover and transmitting it to the tilling shafts 46 and 47. Reference numeral 24 is a rotary side cover, which is a rotary cover for covering the upper half of the spiral rotor 90. 25 is a member for closing both sides, 26 is a side rear cover,
The rotary side cover 24 is attached to the rear part of the rotary side cover 24 so as to be adjustable in position, and 27 is a curved elongated hole therefor. Further, 28 is a resistance rod, which is a member which has a tail sled (or depth adjusting shoe) 29 at the tip (lower end) thereof and which adjusts the plowing depth.

FIG. 2 is a plan view of the work vehicle according to the present invention (the work machine 20 is simply represented. Details will be described later). The front weight 5, the operation pedal 16, and the steering are arranged in order from the front of the machine body. It shows that the handle 7, the occupant seat 8, the prime mover 9, the chain case 31 as a transmission means, the work machine mission device 40, and the work machine 20 are arranged. The chain case 31 is a sealed case that houses the drive sprocket 32, the driven sprocket 33, and the chain 34 together, and the work machine mission device 40 is a sealed case that houses the gears, sprockets, and chains (not shown) together. Since these have a sealed structure, there is no concern that rainwater or mud will enter the inside. Further, 36 is a shift lever, 3
Reference numeral 7 is a tillage claw rotation / stop lever, 38 is an air cleaner, and 39 is a starter grip.

FIG. 3 is a vertical sectional view of a work machine mission case according to the present invention. The working machine mission device 40 includes a working machine mission case 41 formed by combining left and right case halves 41L and 41R, an input shaft 42, a first intermediate shaft 43, and a second intermediate shaft arranged in the case 41 in the order of power transmission. It is composed of a shaft 44 and an output shaft 45. The output shaft 45 includes a first cultivating shaft 46 and first cultivating shafts 47, 47 arranged coaxially. Reference numerals 48 and 49 denote bolts and nuts, which are components for connecting the left and right case halves 41L and 41R.

First, the operation of the work machine mission device 40 will be described. When the prime mover of the work vehicle drives the input shaft 42, the input shaft 42 → the input shaft sprocket 51 → the chain 52 → the first intermediate sprocket 53 → the first intermediate sprocket 53 1 intermediate gear 54 →
The torque is transmitted in the order of the second intermediate gear 55, the second intermediate sprocket 56, the chain 57, the reverse rotation shaft sprocket 58, and the first tillage shaft 46, so that the first tillage shaft 46 is rotated in the reverse direction.
Further, the input shaft 42 → the input shaft sprocket 51 → the chain 52 → the first intermediate sprocket 53 → the first intermediate gear 54 →
The torque is transmitted in the order of the second intermediate gear 55 → the third gears 61L and 61R → the fourth gears 62L and 62R → the first tilling shafts 47 and 47, and the first tilling shafts 47 and 47 are normally rotated.

In the left case half 41L, the input shaft cylinder 65 and the output shaft cylinder 66 are welded to the case half base 64L formed by press forming a steel plate, and the bearing seat 67 of the first intermediate shaft is formed.
Also, a bearing seat 68 for the second intermediate shaft is formed, and a bearing holding plate 69 for receiving the outer peripheral surface of the bearing is additionally provided inside. The bearing holding plate 69 has a hole in which a bearing 71 of the first intermediate shaft 43 is fitted and a hole in which the bearing 72 of the second intermediate shaft 44 is fitted, which is formed in a flat plate thicker than the case half base 64L. A hole through which the output shaft cylinder 66 penetrates is opened in the lower part.
73 is a bearing for receiving the input shaft 42, and 74 is the first tillage shaft 47.
A bearing 75 for receiving the first tillage shaft 46 and the first tillage shaft 47.
It is a needle bearing to be received by. The bearing seats 67 and 68 are portions that receive one side surface of the outer races of the bearings 71 and 72, and the bulging portions 76 and 77 are released to the outside to allow the inner races of the bearings 67 and 68 to rotate freely. It is a part.

The right case half body 41R and the case half body base 64R have the same structure as the left case half body 41L and the case half body base 64L, and a description thereof will be omitted.

FIG. 4 is a view of the left case half base according to the present invention (from the view of the arrow 4-4 in FIG. 3, the sprocket, the gear,
It is equivalent to the figure with the bearing and the bearing holding plate removed). In addition,
In the figure, Fr indicates "front" (forward side). The left case half base 64L has an input shaft center P1 and an output shaft center P2.
With respect to the line L1 passing through and, the flange 78 and the bolt hole 7
The arrangement of 9,80 is symmetrical, and the center P3 of the first intermediate axis
And the center P4 of the preliminary bearing seat 67S of the first intermediate shaft provided in the vicinity of the second intermediate shaft is set so that the line L2 is orthogonal to the line L1 when the line passing through is L2.

That is, the right half seat second half intermediate shaft bearing seat 68S is preliminarily formed in the vicinity of the first intermediate shaft bearing seat 67, and the right half of the second intermediate shaft bearing seat 68S is formed in the vicinity of the second intermediate shaft bearing seat 68. The bearing seat 67S of the first intermediate shaft for the case half is formed in advance. As a result, the bearing seat 6 of the first intermediate shaft
7 and the spare bearing seat 68S form a gourd-shaped protrusion 81 that bulges inward in the drawing, and similarly, the bearing seat 68 of the second intermediate shaft and the spare bearing seat 67S bulges inward in the drawing. 82, and these gourd-shaped protrusions 81 and 82 are formed in an "inverted C" shape. The "reverse C" -shaped convex portions 81 and 82 are symmetrical with respect to the line L1. As is apparent from FIG. 3, by forming the bulging portions 76 and 77, the sectional modulus of the case half-body base 64L increases, and the strength and rigidity increase.

FIG. 5 is a diagram of a right case half base according to the present invention (corresponding to a diagram in which a chain, a sprocket, a gear, a bearing, and a bearing holding plate are removed from the view taken along arrow 5-5 in FIG. 3). . In the figure, Fr indicates "front" (forward side). The right case half base 64R has the flange 78 and the bolt holes 79, 80 arranged symmetrically with respect to a line L1 passing through the center P1 of the input shaft and the center P2 of the output shaft, and the center of the first intermediate shaft. P3 and the center P4 of the preliminary bearing seat 67S of the first intermediate shaft provided in the vicinity of the second intermediate shaft are set so that the line L3 is orthogonal to the line L1 when the line is L3.

That is, the right half seat second intermediate shaft bearing seat 68S for the case half is preliminarily formed in the vicinity of the first intermediate shaft bearing seat 67, and the right case near the second intermediate shaft bearing seat 68 is formed. The bearing seat 67S of the first intermediate shaft for the case half is formed in advance. As a result, the bearing seat 6 of the first intermediate shaft
7 and the spare bearing seat 68S form a gourd-shaped protrusion 81 that bulges inward in the drawing, and similarly, the bearing seat 68 of the second intermediate shaft and the spare bearing seat 67S bulges inward in the drawing. 82, and these gourd-shaped protrusions 81 and 82 are formed in an "inverted C" shape.

The operation of the working machine mission device of the present invention described above can be summarized as follows: the bearing seat 67 of the first intermediate shaft and the second bearing seat 67.
If the bearing seat 68 of the intermediate shaft and the spare bearing seats 67S and 68S have the same shape, the left case half base 64L in FIG. 4 and the right case half base 64R in FIG. 5 have the same shape.
Then, the bearing holding plate 69 described with reference to FIG. As a result, the case half bases 64L, 6
Not only the 4R, but also the left and right case halves 41R, 41L can be made completely the same shape, and as a result, the left and right case halves 41R, 41L can be manufactured in the same drawing. There is an advantage that when casting is used, only one mold is required, and when pressing is used, only one press die is required.

FIG. 6 is a view of a first embodiment of the working machine of the present invention, in which a hollow first tilling shaft 47 is extended from the working machine mission case 41 and the inside of the first tilling shaft 47 is penetrated. The second tillage shaft 46 is extended from the work machine mission case 41, the claw-shaped tillage claw 21 which is the first tillage shaft near the mission case is attached, and the spiral rotor 90 is attached at the second tillage shaft far from the mission case. It is characterized by The cultivating nail 21 may be an ordinary nail or a petal nail.

In the spiral rotor 90, cone type disks 92, 92 are attached to a hollow shaft 91, rings 93, 93 are attached to the tips of these disks 92, 92, and a ribbon-shaped spiral cutter 94 is attached to these rings 93, 93.
(For convenience, only one sheet is shown in the figure.) Replace this spiral rotor 90 with a long bolt 9
It is fixed to the second tillage shaft 46 at 5.

Further, the tilling claw 21 is mounted on the first tilling shaft 4 via an attachment 85 composed of a boss 86 and a disk 87.
Attach it to 7. Reference numeral 88 is a bolt for attaching the tilling claw 21 to the disk 87, and 89 is a lock bolt for fixing the attachment 85 to the first tillage shaft 47. As described above, the first cultivating shaft 47 and the second cultivating shaft 46 are forcibly rotated in opposite directions.

The operation of the working machine (first embodiment) described above will be described below. FIG. 7 is an operation explanatory view of the working machine (first embodiment) according to the present invention, and the working machine mission case 41.
Operation causes the first tiller shaft 47 to rotate normally and the second tiller shaft 46 to rotate.
To reverse. Therefore, the tilling claw 21 attached to the first tilling shaft 47 near the mission case 41 is normally rotated, and the spiral rotor 90 attached to the second tilling shaft 46 far from the mission case 41 is rotated reversely.

First, if the nails that have become the plowing nails 21 are adopted,
The lower part of the mission case 41 can be scratched by the bent part of the tata claw, and weeding of this part and crushing of the topsoil can be carried out. By the crushing action of this topsoil, it has the action of cutting the grass roots and separating the cultivated soil attached to the grass roots and returning it to the cultivated land. If this tiller 21 is reversed,
The cut grass and soil fly forward and accumulate, which causes the bottom of the mission case 41 (this is referred to as a “stack” phenomenon). In the present embodiment, however, the plowing claw 21 is rotated forward, Mowed grass and soil mainly fly backwards, and such defects do not occur.

Furthermore, the plowing claw 21 and the spiral rotor 90
By reversing and, the reaction forces generated in the work machine 20 are offset. That is, the forward rotation plowing claw 21 is the working machine 20.
, And the reverse spiral rotor 90 tries to retract the work implement, canceling the forces. As a result, the load on the towing of the work vehicle 1 is reduced, and the work vehicle 1 can be made lighter and smaller.
Preferably, if the normal rotation and the reverse rotation have the same rotation speed, a larger canceling effect can be exhibited. Further, since the tilling claw 21 and the spiral rotor 90 are wrapped, there is also an advantage that there is no uncut grass between the claw and the rotor.

FIG. 8 is a view of a second embodiment of the working machine of the present invention, in which the hollow first tilling shaft 47 is extended from the working machine mission case 41 and the inside of the first tilling shaft 47 is penetrated. The second tiller shaft 46 extending from the work machine mission case 41, and the first tiller shaft 47 near the mission case.
A spiral rotor 90 is attached to the second cultivating shaft 46, the cultivating claw 21 is attached to the second cultivating shaft 46 distant from the mission case, the first cultivating shaft 47 is reversed, and the second cultivating shaft 46 is normally rotated. As a general rule, the outer diameter of the swiveling claw 21 is set larger than the outer diameter of the spiral rotor 90.

By reversing the spiral rotor 90 and the tilling claw 21 with each other, the reaction force generated in the working machine is offset. That is, the forward rotation plowing claw 21 tends to move the work implement 20 forward, and the reverse rotation spiral rotor 90 tends to move the work implement 20 backward, so that the forces are offset. As a result, the load on the towing of the work vehicle 1 is reduced, and the work vehicle 1 can be made lighter and smaller. Preferably,
If the normal rotation and the reverse rotation have the same number of revolutions, a larger canceling effect can be exhibited.

Since both sides of the mowing width are mowed by the plowing claws 21 having a diameter larger than that of the spiral rotor 90, the mowing width becomes clear, which is convenient when performing mowing in a wide field and reciprocating, and the working effect is improved. . Of course, the plowing claw 21 also exerts a crushing effect on the topsoil.

FIG. 9 is a diagram showing a third embodiment of the working machine of the present invention. The hollow first cultivating shaft 47 is extended from the working machine mission case 41, and the inside of the first cultivating shaft 47 is penetrated. The second tiller shaft 46 extending from the work machine mission case 41, and the first tiller shaft 47 near the mission case.
It is characterized in that the spiral rotor 90 is attached to, the second tillage shaft 46 far from the mission case is provided with the tillage claw 21, the first tillage shaft 47 is normally rotated, and the second tillage shaft 46 is reversed. As a general rule, the outer diameter of the swiveling claw 21 is set larger than the outer diameter of the spiral rotor 90.

By reversing the spiral rotor 90 and the tilling claw 21 with each other, the reaction force generated in the working machine is offset. That is, the forward rotation plowing claw 21 tends to move the work implement 20 forward, and the reverse rotation spiral rotor 90 tends to move the work implement 20 backward, so that the forces are offset. As a result, the load on the towing of the work vehicle 1 is reduced, and the work vehicle 1 can be made lighter and smaller. Preferably,
If the normal rotation and the reverse rotation have the same number of revolutions, a larger canceling effect can be exhibited.

Since both sides of the mowing width are mowed by the plowing claws 21 having a diameter larger than that of the spiral rotor 90, the mowing width becomes clear, which is convenient when performing mowing in a reciprocating wide field and the working effect is improved. . Of course, the plowing claw 21 also exerts a crushing effect on the topsoil. Further, since the spiral rotor 90 on the side of the mission case 41 is rotated in the normal direction, there is no concern that the grass or soil cut off will fly forward, and the occurrence of bottoming of the mission case 41 can be suppressed.

FIG. 10 is a view of a fourth embodiment of the working machine of the present invention. The hollow first tilling shaft 47 is extended from the working machine mission case 41 and the inside of the first tilling shaft 47 is penetrated. To extend the second tillage shaft 46 from the work machine mission case 41, and the first tiller shaft 4 near the mission case.
The spiral rotor 90A is attached to the No. 7, and the spiral rotor 90B is also attached to the second tillage shaft 46 far from the mission case.
Attached, the first tillage shaft 47 (spiral rotor 90A)
And the second tillage shaft 46 (spiral rotor 90B)
It is characterized by rotating in the normal direction.

By reversing the spiral rotor 90A and the spiral rotor 90B, the reaction force generated in the working machine is offset. That is, the normal rotation spiral rotor 90
B tries to move the working machine 20 forward, and the reverse spiral rotor 90A tries to move the working machine 20 backward.
The forces are offset. As a result, the load on the towing of the work vehicle 1 is reduced, and the work vehicle 1 can be made lighter and smaller. Preferably, if the normal rotation and the reverse rotation have the same rotation speed, a larger canceling effect can be exhibited.

FIG. 11 is a view of a fifth embodiment of the working machine of the present invention, in which the hollow first tilling shaft 47 is extended from the working machine mission case 41 and the inside of the first tilling shaft 47 is penetrated. To extend the second tillage shaft 46 from the work machine mission case 41, and the first tiller shaft 4 near the mission case.
The spiral rotor 90A is attached to the No. 7, and the spiral rotor 90B is also attached to the second tillage shaft 46 far from the mission case.
Attached, the first tillage shaft 47 (spiral rotor 90A)
In the forward direction, the second tillage shaft 46 (spiral rotor 90B)
It is characterized by reversing.

By reversing the spiral rotor 90A and the spiral rotor 90B, the reaction forces generated in the working machine are offset. That is, the normal rotation spiral rotor 90
A tries to move the working machine 20 forward, and the reverse spiral rotor 90B tries to move the working machine 20 backward.
The forces are offset. As a result, the load on the towing of the work vehicle 1 is reduced, and the work vehicle 1 can be made lighter and smaller. Preferably, if the normal rotation and the reverse rotation have the same rotation speed, a larger canceling effect can be exhibited. Furthermore,
Since the spiral rotor 90A on the mission case 41 side is rotated in the normal direction, there is no concern that the cut grass or soil will fly forward, and the occurrence of bottoming of the mission case 41 can be suppressed.

Claim 1 of the present invention corresponds to Example 1, claim 2 corresponds to Examples 2 and 3, and claim 3 corresponds to Examples 4 and 5. Further, the plowing nail 21 is preferably a flat nail, but may be an ordinary nail or a petal nail.

[0046]

The present invention has the following effects due to the above configuration. According to a first aspect of the present invention, a hollow first tillage shaft is extended from the work implement mission case, and a second tillage shaft is extended from the work implement mission case by penetrating the inside of the first tillage shaft, and the hollow first tiller shaft is provided near the mission case. A coaxial forward / reverse working machine is constructed by rotating the first tilling shaft in the forward direction, attaching the tilling claw to this shaft, rotating the second tilling shaft farther from the mission case in the reverse direction, and attaching the spiral rotor to this shaft.

Since the cultivating claws are arranged near the mission case, it is possible to eliminate the uncultivated part below the mission case. Moreover, since the cultivating claws are normally rotated, the grass and soil cut can be smoothly discharged backward. It is possible to suppress the stack phenomenon where the mission case is mounted on the remaining soil. Since the plowing claw and the spiral rotor are reversed, the work reaction forces are offset, the load on the work vehicle is reduced, and the working vehicle can be reduced in weight and size. In addition, weeding can be carried out at a certain depth, which improves the appearance after weeding and improves the finish of weeding.

According to a second aspect of the present invention, the hollow first tiller shaft is extended from the work implement mission case, and the second tiller shaft is extended from the work implement mission case by penetrating the inside of the first tiller shaft. A spiral rotor is attached to the first tiller shaft near the case, a tiller claw is attached to the second tiller shaft far from the mission case, and the first tiller shaft and the second tiller shaft are rotated in reverse to each other, so that the coaxial forward / reverse working machine is provided. Make up.

Since the spiral rotor and the tiller are reversed, the work reaction forces are offset, the load on the work vehicle is reduced, and the working vehicle can be reduced in weight and size.
Since both sides of the mowing width are mowed by the plowing claws, the mowing width becomes clear, which is convenient when performing mowing on a wide field back and forth, and the working effect is improved.

According to a third aspect of the present invention, the hollow first tiller shaft is extended from the work implement mission case, and the second tiller shaft is extended from the work implement mission case by penetrating the inside of the first tiller shaft. A spiral rotor is attached to both the first cultivating shaft near the case and the second cultivating shaft distant from the mission case, and the first forward cultivating shaft and the second cultivating shaft are rotated in opposite directions to form a coaxial forward / reverse working machine.

Since the spiral rotor and the spiral rotor are reversed, the work reaction forces are offset, the load on the work vehicle is reduced, and the weight and size of the working vehicle can be reduced.

A fourth aspect of the present invention is characterized in that the rotation speeds of the first tilling shaft and the second tilling shaft are substantially the same.

Since the normal rotation speed and the reverse rotation speed are substantially the same, the forward force and the backward force can be canceled well.

[Brief description of the drawings]

FIG. 1 is a side view of a work vehicle according to the present invention.

FIG. 2 is a plan view of a work vehicle according to the present invention.

FIG. 3 is a vertical cross-sectional view of a work machine mission case according to the present invention.

FIG. 4 is a diagram of a left case half base according to the present invention.

FIG. 5 is a diagram of a right case half base according to the present invention.

FIG. 6 is a diagram of a first embodiment of a working machine of the present invention.

FIG. 7 is an operation explanatory view of the working machine according to the present invention (first embodiment).

FIG. 8 is a diagram of a second embodiment of the working machine of the present invention.

FIG. 9 is a diagram of a third embodiment of the working machine of the present invention.

FIG. 10 is a diagram of a fourth embodiment of the working machine of the present invention.

FIG. 11 is a diagram of a fifth embodiment of the working machine of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Working vehicle, 20 ... Working machine, 21 ... Plowing claw, 41 ... Working machine mission case (mission case), 46 ... 2nd tilling axis, 47 ... 1st tilling axis, 90, 90A, 90B ...
Spiral rotor.

Claims (4)

[Claims] 1. A hollow first from a work machine mission case.
Along with extending the tiller shaft, the inside of the first tiller shaft is penetrated to extend the second tiller shaft from the work machine mission case, and the first tiller shaft near the mission case is normally rotated and the tiller claw is also attached to this shaft. A coaxial forward / reverse working machine characterized in that a second cultivating shaft remote from the mission case is reversely rotated and a spiral rotor is mounted on this shaft. 2. The first hollow from the work machine mission case.
Along with extending the tiller shaft, the inside of the first tiller shaft is penetrated to extend the second tiller shaft from the work equipment mission case, the spiral rotor is attached to the first tiller shaft near the mission case, and it is far from the mission case. A coaxial forward / reverse working machine characterized in that a tilling claw is attached to a second tilling shaft, and the first tilling shaft and the second tilling shaft are rotated in opposite directions to each other. 3. The work machine mission case is hollow from the first case.
Along with extending the tiller shaft, the second tiller shaft is extended from the work machine mission case by penetrating the inside of the first tiller shaft to the first tiller shaft near the mission case and the second tiller shaft far from the mission case. A coaxial forward / reverse working machine, characterized in that a spiral rotor is attached to both of them, and the first tillage shaft and the second tillage shaft are rotated in opposite directions to each other. 4. The coaxial forward / reverse working machine according to claim 1, wherein the first and second tillage shafts have substantially the same rotational speed.