JP2000295902A - Rotary tiller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the stable tilling work by making tilling tines surely cut into soil even on a hard field. SOLUTION: The filling shaft 24 of a walking type tiller has two tilling tines 26a, 26b placed on a first fixing bracket 31a located on the innermost side, one tilling tine 26c and two anchor tines 27a, 27b placed on a second fixing bracket 31b next to the first bracket, one tilling tine 26d and one anchor tine 27c placed on a third fixing bracket 31c next to the second bracket, and two tilling tines 27e, 27f placed on a forth bracket 31d located on the outermost side. Even on a hard field, the anchor tines 27a to 27c, whose front ends bend in the forward direction of the rotation, are stuck into soil to enable the prevention of the floating up of the tilling tines 26a to 26f. As a result, the tilling tines 26a to 26f are allowed to surely cut into soil with the result of exhibiting the tilling performance, and at the same time, the dashing of the machine body accompanied by the floating up of the tilling tines 26a to 26f is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary cultivator having a cultivating claw provided on a cultivating shaft extending from a transmission case to both left and right sides and rotated by an engine.

[0002]

2. Description of the Related Art Such a rotary cultivator is disclosed in
86502, JP-A-4-166424, and JP-B-46-39041.

[0003] Japanese Utility Model Laid-Open No. 57-86502 discloses that
A so-called front tine type rotary cultivator in which a plurality of tilling claws serving also as wheels for traveling are provided on a tilling shaft extending left and right from a transmission case is described.

Japanese Patent Application Laid-Open No. Hei 4-166424 discloses that an axle extending left and right from a traveling mission case is provided with traveling wheels, and is extended left and right from a tilling mission case located behind the traveling mission case. A so-called rear tine type rotary cultivator in which a plurality of tilling claws are provided on a tilling shaft is described.

Japanese Patent Publication No. 46-39041 discloses a pair of a forward tilling shaft and a reverse tilling shaft which are fitted coaxially and rotate in opposite directions to each other, on the left and right sides of a transmission case. Thus, there is described a rear tine rotary tiller that balances the propulsive force generated by a tilling claw provided on a forward rotation tilling shaft with the resistance generated by a tilling claw provided on a reverse rotation tilling shaft to prevent dashing. ing.

[0006]

By the way, in a rotary tine of a front tine type, since a tilling claw has both a function of generating a tilling force and a function of generating a propulsion force, a resistance rod is used to generate a motive force generated by the tilling claw. It is necessary for the operator to adjust the load applied to the resistance bar so that an appropriate forward speed can be obtained by offsetting the generated resistance. However, it is difficult for beginners to increase or decrease the magnitude of the resistance generated by the resistance rod, and the tilling force is suddenly increased when the cultivation claw cannot be cut into the soil and rises up in a hard field. Therefore, there is a possibility that a phenomenon (dashing phenomenon) occurs in which the propulsion force increases and the aircraft rapidly advances.

[0007] Even in the rear tine type rotary tiller, there is a problem that the balance between the tillage force and the propulsion force is lost when the tillage claw is not smoothly cut into the soil in a hard field, and it becomes difficult to perform a stable tillage operation. .

The present invention has been made in view of the above circumstances, and has as its object to stably cut a tilling nail into the soil even in a hard field so that a stable tilling operation can be performed.

[0009]

To achieve the above object, according to the first aspect of the present invention, a tilling claw is provided on a tilling shaft extending right and left from a transmission case and driven forward by an engine. In the provided rotary cultivator, there is proposed a rotary cultivator characterized in that an anchor claw whose tip portion is curved toward the rotation direction advance side is provided on a tilling shaft.

[0010] According to the above structure, the tilling shaft having the tilling claw, which is normally driven, is provided with the anchor claw whose tip is curved toward the rotationally advancing side, so that the anchor claw can be inserted into the soil even in a hard field. The lifting of the tilling nail can be suppressed. As a result, the tilling claw can be reliably cut into the soil to exhibit tilling performance, and also the dashing of the machine due to the lifting of the tilling claw can be prevented.

According to the second aspect of the present invention,
In addition to the configuration of claim 1, it is provided that an anchor claw is provided in the rotation surface of the tilling claw whose tip is curved to the rotation direction delay side, and the tip of the tilling claw and the tip of the anchor claw are brought closer to each other. A featured rotary tiller is proposed.

According to the above construction, the tilling claw whose tip is curved in the rotation direction delay side and the anchor claw whose tip is curved in the rotation direction advance side are arranged in the same rotation plane, and the tip of the tilling claw and Because the tips of the anchor claws were brought closer to each other,
Grass is less likely to enter between the tip of the tilling claw and the tip of the anchor claw, and winding of grass can be reduced.

According to the third aspect of the present invention,
In addition to the configuration of the first aspect, there is proposed a rotary tiller having an anchor claw provided at an axially outer end of the tillage shaft.

According to the above configuration, the anchor claws are provided at the axially outer ends of the tilling shafts extending to the left and right sides from the transmission case, so that the tilling claws provided at the outer ends of the left and right cultivating shafts are suppressed from rising. The straightness of the machine can be improved.

According to the invention described in claim 4,
In addition to the configuration of the first aspect, a rotary cultivator is characterized in that an anchor claw is provided between the rotation surface of the cultivation claw on the outside in the axial direction and the rotation surface of the cultivation claw on the inside in the axial direction.

According to the above configuration, the anchor claws are arranged between the rotation surfaces of the cultivating claws on the outside in the axial direction and the inside on the axial direction, so that the thrust generated by the cultivating claws is prevented from being hindered by the anchor claws. Thus, it is possible to achieve both the securing of the tilling performance and the anti-dashing performance and the securing of the propulsion.

According to the invention described in claim 5,
In addition to the configuration of the first aspect, a rotary cultivator is proposed, in which a tilling claw and an anchor claw are arranged on opposite sides of a tilling axis.

According to the above configuration, the tilling claw and the anchor claw are attached with a phase difference of 180 °, so that the tilling claw and the anchor claw can act alternately to improve the tilling performance.

According to the invention described in claim 6,
In addition to the configuration according to any one of claims 1 to 5, a rotary cultivator is proposed, in which a soil release surface wider than a base end portion is formed at a distal end portion of an anchor claw.

According to the above configuration, since a wide soil release surface is formed at the tip of the anchor claw, when the anchor claw digging into the soil goes out into the air, the soil is repelled by the soil release surface to be finely divided. Can be crushed.

According to the seventh aspect of the present invention,
A forward tilling shaft that extends in both axial directions from the transmission case and is driven forward by the engine, and a reverse tilling shaft that is arranged coaxially outside the forward tilling shaft and driven in reverse by the engine, respectively. In a rotary cultivator provided with a tilling claw, a rotary cultivator has been proposed, in which at least one of a forward cultivating shaft and a reverse cultivating shaft is provided with an anchor claw that is curved toward a rotation direction leading side of the cultivating shaft. You.

According to the above construction, the forward tilling shaft and the reverse tilling shaft are provided on the forward tilling shaft and the reverse tilling shaft which extend coaxially from both sides of the transmission case and rotate in opposite directions. Dashing can be prevented by canceling the propulsive force of the tilling claw of the tilling shaft. Moreover, since the anchor claws curved in the rotation direction leading side are provided on at least one of the forward rotation tillage shaft and the reverse rotation tillage shaft, even in a hard field, the anchor claws are pierced into the soil to suppress the lifting of the tillage claw, and the tillage claw is soiled. It is possible to make sure that it is cut in the inside to exhibit the tilling performance and to prevent the dashing of the fuselage more reliably.

According to the eighth aspect of the present invention,
In addition to the configuration of claim 7, an anchor claw is provided in the rotation surface of the tilling claw whose tip is curved to the rotation direction delay side, and the tip of the tilling claw and the tip of the anchor claw are brought closer to each other. A featured rotary tiller is proposed.

According to the above construction, the tilling claw whose tip is curved in the rotation direction delay side and the anchor claw whose tip is curved in the rotation direction advance side are arranged in the same rotation plane, and the tip of the tilling claw and Because the tips of the anchor claws were brought closer to each other,
Grass is less likely to enter between the tip of the tilling claw and the tip of the anchor claw, and winding of grass can be reduced.

According to the ninth aspect of the present invention,
In addition to the configuration of claim 7, a rotary cultivator is proposed, in which an anchor claw is provided between the rotation surface of the cultivation claw on the outside in the axial direction and the rotation surface of the cultivation claw on the inside in the axial direction.

According to the above configuration, since the anchor claws are arranged between the rotation surfaces of the tilling nails on the outside in the axial direction and on the inside in the axial direction, the thrust generated by the tilling claws is prevented from being hindered by the anchor claws. Thus, it is possible to achieve both the securing of the tilling performance and the anti-dashing performance and the securing of the propulsion.

According to the tenth aspect of the present invention, in addition to the configuration of the seventh aspect, the anchor claws provided on the forward rotation tillage shaft and the anchor claws provided on the reverse rotation tillage shaft are mutually mutually axially. A rotary tiller characterized by being arranged adjacently is proposed.

According to the above configuration, since the anchor claws of the forward tilling shaft and the reverse tilling shaft face each other, the grass to be wound on the forward cultivating shaft or the reverse tilling shaft is moved in the reverse direction. Rotating anchor claws can be loosened to reduce grass wrap.

According to the eleventh aspect of the present invention, in addition to the configuration of the seventh aspect, the anchor claws provided on the forward rotation tillage shaft and the anchor claws provided on the reverse rotation tillage shaft intersect in the soil. A rotary tiller characterized by the above is proposed.

According to the above configuration, since the forwardly rotating anchor claws and the reversely rotating anchor claws intersect in the soil, the resistance generated by the normally rotating anchor claws and the thrust generated by the reversely rotating anchor claws are reduced. And the traveling speed of the aircraft can be stabilized.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on embodiments of the present invention shown in the accompanying drawings.

FIGS. 1 to 4 show a first embodiment of the present invention. FIG. 1 is an overall side view of a front tine type rotary cultivator, FIG. FIG. 3 is FIG.
FIG. 4 is a perspective view of the tilling part.

As shown in FIGS. 1 to 3, the front tine type rotary cultivator T has a lower engine cover 11.
And a single-cylinder engine E covered by an upper engine cover 12. A transmission case 13 is coupled to a lower portion of the engine E. A cooling fan 15 is provided at an upper end of a crankshaft 14 of the engine E arranged vertically, and a lower end is connected via a clutch 17 to a drive shaft 16 supported vertically in a transmission case 13. You. A driven shaft 18 extending in the left-right direction of the vehicle body is supported at a lower end of the transmission case 13. A worm 20 provided at the lower end of the drive shaft 16 meshes with a worm wheel 19 provided at the center of the driven shaft 18. Accordingly, the rotation of the crankshaft 14 of the engine E is transmitted to the driven shaft 18 via the clutch 17, the drive shaft 16, the worm 20, and the worm wheel 19. A steering handle 22 extending rearward and upward of the vehicle body is detachably provided on a handle post 21 provided at the rear of the transmission case 13, and a resistance bar 23 is detachably provided on the handle post 21 via a bracket.

The inner ends of the left and right tilling shafts 24 are fitted to the outer ends of the driven shafts 18 projecting left and right from the transmission case 13 and connected by pins 25, 25. These tilling shafts 24, 24 It is driven in the forward direction, that is, in the forward direction of the cultivator T. Six tilling claws 26a-2 on each tilling shaft 24
6f and three anchor claws 27a to 27c are provided. A gauge wheel support shaft 29 having a gauge wheel 28 is detachably attached to the tip of each tilling shaft 24 with a pin 30.

Tilling claws 26a to 26 made of known claws
f is such that the tip side of the plate-shaped blade is curved in the rotation direction delay side and is curved in the axial direction outside or in the axial direction of the cultivation shaft 24, and is easily cut into the soil of the field by this shape. Is effectively inverted to enhance the tilling effect. On the other hand, anchor claws 27a-2
Reference numeral 7c is a member having a square rod-shaped cross section, the tip side of which is curved by approximately 90 ° toward the rotationally advancing side, so that the curved tip portion of the cultivator T easily penetrates into hard soil as it advances. It has become.

Tilling claws 26a to 26f and anchor claws 2
7a to 27c can be arranged in various patterns. In this embodiment, they are arranged in the following patterns. In addition, the tilling claw 26a-in the right tilling shaft 24
The arrangement pattern of 26f and the anchor claws 27a to 27c and the arrangement pattern of the tilling claws 26a to 26f and the anchor claws 27a to 27c on the left cultivating shaft 24 are symmetrical with respect to the center line CL.

As is clear from FIGS. 2 and 4, each tilling shaft 24 has an axially inner side (center line CL).
Side) to four rows of mounting brackets 31 extending axially outward.
a, 31b, 31c and 31d are provided. Here, the first mounting bracket 31a, the second mounting bracket 31b, the third mounting bracket 31c, and the fourth mounting bracket 31d are referred to in order from the inner side in the axial direction.

The innermost first mounting bracket 31a is provided with an outwardly curved tilling claw 26a and an inwardly curved tilling claw 26b, and the next second mounting bracket 31b is provided.
Is provided with a tilling claw 26c curving outward and two anchor claws 27a and 27b, and a tilling claw 26d curving outward and one anchor claw 27c are curved on the next third mounting bracket 31c. The outermost fourth mounting bracket 31d is provided with a cultivating claw 26e that curves outward and a cultivating claw 26f that curves inward.

Four tilling claws 26 curved outward in the axial direction
Although there is no functional difference between a, 26c, 26d, 26e and the two tilling claws 26b, 26f curved inward in the axial direction, the bending direction of the six tilling claws 26a to 26f is changed in the axial direction. It is necessary to appropriately distribute the cultivation to the inside and outside, and to take care that uniform tilling can be performed over the entire length of the left and right tilling shafts 24, 24.

By the way, in the conventional cultivator having only the tilling claw without the anchor claw, when the surface of the field is hard, the tilling claw may not be cut into the soil and may rise. In such a case, the tilling claw functions as a mere wheel without exerting the tilling force, so that there is a possibility that a dashing phenomenon in which the body of the tilling machine rapidly advances is generated.

On the other hand, according to the cultivator T of the present embodiment, the anchor claws 27a to 27c whose distal ends are curved by approximately 90 ° in the rotational direction advance side easily penetrate the hard surface of the field to exhibit the anchor effect. Therefore, the tilling claws 26a to 26f
Can be reliably cut into the surface of the field without being lifted. As a result, not only can the tilling effect of the tilling claws 26a to 26f be reliably exhibited, but also the resistance rod 2
It is possible to surely prevent dashing of the body of the cultivator T without requiring any skill in the operation of Step 3.

Hereinafter, second to seventh embodiments of the present invention will be described with reference to FIGS. 5 to 10, only the tilling part on the right side of the center line CL of the fuselage is shown, but the tilling part on the left side of the fuselage has a structure that is symmetrical with the tilling part on the right side of the center line CL. . In addition, although the tilling claws 26a to 26f are actually curved outward or inward in the axial direction, the curvature is omitted from the illustration. Further, similarly to the first embodiment, the tilling claws 26a to 26f
Are curved in the rotation direction delay side, and the anchor claws 27a, 27b
Is curved toward the leading side in the rotation direction.

In the second embodiment shown in FIG. 5, a first mounting bracket 31a, a second mounting bracket 31b and a third mounting bracket 31c are provided at predetermined intervals from the inside to the outside of the tilling shaft 24. 1 mounting bracket 31a
Has two tilling claws 26a, 26b and one anchor claw 2
7a, the middle second mounting bracket 31b is provided with one cultivating claw 26c and one anchor claw 27b, and the outer third mounting bracket 31c is provided with two cultivating claws 26d, 26e. And one anchor claw 27c. Further, the tip of the tilling claw and the tip of the anchor claw in the same rotation plane are arranged so as to approach each other. Specifically, the tip of the tilling claw 26a attached to the first mounting bracket 31a and the tip of the anchor claw 27a approach each other, and the tip of the tilling nail 26c and the anchoring claw 27b attached to the second mounting bracket 31b. The tips approach each other, and the tips of the tilling claw 26d and the anchor claw 27c attached to the third mounting bracket 31c approach each other.

According to this embodiment, the anchor claws 27a, 2
Crops 26a, 26c, 26 at the tips of 7b, 27c
Since the tips of d are close to each other, it is possible to effectively prevent grass from entering between the two and winding around the tilling shaft 24.

In the third embodiment shown in FIG. 6, a first mounting bracket 31a, a second mounting bracket 31b, a third mounting bracket 31c, and a fourth mounting bracket 31d are provided at predetermined intervals from the inside to the outside of the tilling shaft 24. And the first
To the fourth mounting brackets 31a to 31d, one tillage claw 26a to 26d and one anchor claw 2 respectively.
7a to 27d are provided. And each one tilling claw 26a-26d provided in each of the 1st-4th mounting brackets 31a-31d and each one anchor claw 27a-
27d are attached to each other with a phase difference of 180 °.

Specifically, the tilling claw 26a and the anchor claw 27a are attached to the first mounting bracket 31a with a phase difference of 180 °, and the tilling claw 26b and the anchor claw 27b are attached to the second mounting bracket 31b with a 180 ° phase difference. The tilling claw 26c and the anchor claw 27c are attached with a phase difference of 180 ° to the third mounting bracket 31c, and the tilling claw 26 is attached to the fourth mounting bracket 31d.
d and the anchor claws 27d are attached with a phase difference of 180 °. And the first to fourth mounting brackets 31a to 3
One tillage claw 26a-26d provided in each of 1d
Further, a pair of each one of the anchor claws 27a to 27d is uniformly arranged in the circumferential direction with a phase difference of 90 ° from each other.

According to the present embodiment, with the rotation of the tilling shaft 24, the tilling claws 26a to 26d and the anchor claws 27a to 2d.
7d can alternately penetrate into the soil, and uniform and effective tilling can be performed.

In the fourth embodiment shown in FIG. 7, a first mounting bracket 31a, a second mounting bracket 31b, a third mounting bracket 31c, and a fourth mounting bracket 31d are provided at predetermined intervals from the inside to the outside of the tilling shaft 24. And the first
The mounting bracket 31a has two tilling claws 26a and 26b.
The second mounting bracket 31b is provided with one tillage claw 26c, and the third mounting bracket 31c is provided with
Four tilling claws 26d are provided, and the fourth mounting bracket 31
In d, one tillage claw 26e and one anchor claw 27a are provided.

According to this embodiment, the anchor claw 27a is provided on the outermost end fourth mounting bracket 31d of the tilling shaft 24 farthest from the center line CL. The lifting of the tilling claw 26e provided can be suppressed, and accordingly, the tilling claw 26a-2 provided on the inner first to third mounting brackets 31a to 31c.
The lifting of 6d is automatically suppressed. In addition, the propulsion force and the resistance force at the left and right ends of the tilling section are stabilized, and the straightness of the cultivator T can be improved.

In the fifth embodiment shown in FIG. 8, a first mounting bracket 31a, a second mounting bracket 31b, a third mounting bracket 31c, and a fourth mounting bracket 31d are provided at predetermined intervals from the inside to the outside of the tilling shaft 24. And the first
The mounting bracket 31a is provided with one tillage claw 26a and one anchor claw 27a.
1b is provided with one tillage claw 26b, and the third mounting bracket 31c is provided with one tillage claw 26c.
The mounting bracket 31d has two tilling claws 26d and 26e.
Is provided.

According to this embodiment, the first mounting bracket 3 at the innermost end of the tilling shaft 24 closest to the center line CL.
1a is provided with an anchor claw 27a.
7a penetrates into the uncultivated land near the transmission case 13, so that the grass pulled out by the tilling claws can be prevented from winding around the anchor claws 27a.

In the sixth embodiment shown in FIG. 9, the first mounting bracket 31a, the second mounting bracket 31b, the third mounting bracket 31c, the fourth mounting bracket 31d, and the fifth mounting bracket 31e extend from the inside to the outside of the tilling shaft 24. Are provided at predetermined intervals, the first mounting bracket 31a is provided with two tilling claws 26a and 26b, the second mounting bracket 31b is provided with one tilling claw 26c, and the third
The mounting bracket 31c is provided with one tillage claw 26d, and the fourth mounting bracket 31d is provided with one anchor claw 2d.
7a, and the fifth mounting bracket 31e is provided with two tilling claws 26e and 26f.

According to this embodiment, the four tilling claws 26a provided on the inner first to third mounting brackets 31a to 31c.
Since the anchor claws 27a provided on the fourth mounting bracket 31d are arranged between the tilling claws 26e and 26f provided on the outer fifth mounting bracket 31e.
The tilling claws 26a to 26f can generate a propulsive force without being hindered by the anchor claws 27a, and the required propulsive force can be easily secured while exhibiting the effect of the anchor claws 27a.

In the seventh embodiment shown in FIG. 10, the arrangement of the tilling claws 26a to 26e and the anchor claws 27a is substantially the same as that of the fourth embodiment described in FIG. The shape is different. That is, the anchor pawl 27a of this embodiment, the tip is curved in the rotation direction leading side is wide soil Hoteki surface 27 ₁ is formed than the width of the width of the base end portion.

According to the present embodiment, when the anchor claw 27a digging into the soil goes out of the soil into the air, the soil release surface 27
₁ can repel the soil and crush it effectively.

11 to 13 show an eighth embodiment of the present invention. FIG. 11 is an overall side view of a rear tine type walking rotary tiller, and FIG. 12 is an enlarged sectional view taken along line 12-12 of FIG. FIG. 13 is a perspective view of the tilling part.

As shown in FIG. 11, the rear tine walking rotary cultivator T has an engine bed 42 extending forward from a traveling transmission case 41 supporting a pair of left and right wheels W, W. The engine E is mounted on the upper part of the bed 42. Tilling transmission case 43 connected to the rear of the traveling transmission case 41
On the upper part of the steering handle 4 via the mounting bracket 44
5 are provided. The upper surface of a rotary working machine 46 provided at the rear end of the tilling transmission case 43 is covered with a rotary cover 47, and a resistance bar 48 whose vertical position is adjustable and a resistance bar 48 that can swing vertically are mounted on the rear of the rotary cover 47. A flat plate 49 is provided.

The crankshaft 50 of the engine E and the transmission input shaft 51 are connected by an endless belt 53 having a tension clutch 52.
And the axle 54 are connected by a transmission gear train 55 and an endless chain 56 housed in the traveling transmission case 41.
The forward / reverse rotation mechanism 57 of the rotary work machine 46 is housed at the rear end of the tilling transmission case 43, and the forward / reverse rotation mechanism 57 is connected to a transmission gear train via an endless chain 58 housed inside the tilling transmission case 43. 55.

Next, the rotary working machine 4 will be described with reference to FIG.
The forward / reverse rotation mechanism 57 of No. 6 will be described.

The forward / reverse rotation mechanism 57 of the rotary working machine 46 includes:
Tilling for ampulla 61 ₁ of the rear end of the left case half 61 and right case half 62 of the transmission case 43, 62 intended to be accommodated in _a pair of left and right positive supported coaxially ball bearings 63, 63 It includes a rotating tillage shaft 64, 64 and a single reverse tilling shaft 65 extending right and left through the right and left forward rotation tilling shafts 64, 64 so as to be relatively rotatable.

Forward tilling shafts 64, 64 and reverse tilling shafts 6
A countershaft 66 is supported in front of 5 via a pair of ball bearings 67, 67. Counter shaft 66
Is connected to the transmission gear train 55 via the endless chain 58. The first sprocket 69 fixed to the counter shaft 66 and the second sprocket 70 fixed to the reverse tilling shaft 65 are connected by an endless chain 71, whereby the reverse tilling shaft 65 is connected.
Is reversed in the same direction as the counter shaft 66 (rotary work machine 4
6 in the direction opposite to the running direction).

On the other hand, a pair of first gears 72, 72 provided at both ends of the counter shaft 66 are provided with left and right forward tilling shafts 64, 6.
4 meshes with a pair of second gears 73, 73 provided respectively. Therefore, both forward tillage shafts 64, 64 are counter shaft 6
6 and the reverse rotation tilling shaft 65 are driven in the reverse direction (the same direction as the traveling direction of the rotary work machine 46).

The gear ratio between the first sprocket 69 and the second sprocket 70 is determined by the first gears 72 and 72 and the second gear 7.
3, 73, so that the number of rotations of the reverse tilling shaft 65 and the number of rotations of the forward tilling shafts 64, 64 are equal to each other, and are slightly smaller than the number of rotations of the counter shaft 66. The rotation speed is decelerated as follows.

Next, the rotary working machine 4 will be described with reference to FIG.
The structure of No. 6 will be described. FIG. 13 shows only the right half of the rotary working machine 46 symmetrical with respect to the center line CL of the machine, and the illustration of the left half is omitted. In addition, the tilling claws 26a to 26c provided on the forward tilling shaft 64 and the reverse tilling shaft 65
26e is a forward tilling shaft 64 and a reverse tilling shaft 6 respectively.
5 is curved to the rotation direction delay side and is also curved to the outside or inside in the axial direction, but only the curvature to the rotation direction delay side is shown and the axial curvature is omitted. In addition, the anchor claw 27a is curved toward the rotationally advancing side of the reverse tilling shaft 65, and is not curved outward or inward in the axial direction.

As is apparent from FIG. 13, the mounting bracket 31a inside the forward rotation tilling shaft 64 located on the inner side in the axial direction.
Are provided with two forward rotation tilling claws 26a and 26b, and the outer mounting bracket 31b is provided with one forward rotation tilling claw 26c. The reverse tilling shaft 65 located on the outside in the axial direction.
The inner mounting bracket 31c is provided with one reverse anchor claw 27a, and the outer mounting bracket 31d is provided with two reverse tilling claws 26d and 26e.

As described above, the forward tilling shaft 64 having the forward tilling claws 26a to 26c and the reverse tilling shaft 65 having the reverse tilling claws 26d and 26e are provided. The forward thrust generated and the backward thrust generated by the reverse tilling shaft 65 can be offset to prevent dashing of the body. In addition, since the anchoring claws 27a are provided on the reverse rotation tilling shaft 65 that generates the backward thrust, the floating tilling claws 26d and 26e of the reverse rotation tilling shaft 65 are suppressed from rising, thereby preventing a sudden increase in the backward thrust. be able to. In addition, since the forward rotation tilling shaft 64 and the reverse rotation tilling shaft 65 are coaxially arranged, by suppressing the floating tilling claws 26d and 26e from rising, the forward rotation tilling claws 26a to 2a are suppressed.
6c is also automatically suppressed.

Hereinafter, ninth to twelfth embodiments of the present invention will be described with reference to FIGS. These embodiments all correspond to the rotary working machine 46 provided with the forward rotation tillage shaft 64 and the reverse rotation tillage shaft 65, and FIGS. 14 to 17 show the same expression as FIG. 13 corresponding to the eighth embodiment. Is going.

The ninth embodiment shown in FIG.
One forward rotation tilling claw 26a and one forward rotation anchoring claw 27a are provided on the inner mounting brackets 31a and 31b, and one forward rotation tilling claw 26b is provided on the outer mounting bracket 31b. . Also, one reverse tilling claw 26c is provided on the mounting bracket 31c inside the reverse tilling shaft 65, and two reverse tilling claws 26d and 26e are provided on the outer mounting bracket 31d.

According to the present embodiment, the anchor pawl 27a is provided on the forward rotation tilling shaft 64 that generates forward propulsive force.
The lifting of the forward rotation tilling claws 26a and 26b of the forward rotation tilling shaft 64 can be suppressed to prevent a sudden increase in forward thrust. Since the forward rotation tilling shaft 64 and the reverse rotation tilling shaft 65 are arranged coaxially, the forward rotation tilling claws 26a, 26
b by suppressing the floating of the reverse tilling claw 26c
Up to 26e is automatically suppressed. Further, since the tip of the forward rotation tilling claw 26a is close to the tip of the forward rotation anchor claw 27a, it is possible to effectively prevent grass from entering between them and winding around the forward rotation tilling shaft 64.

In the tenth embodiment shown in FIG. 15, two forward tilling claws 26a and 26b are provided on the mounting bracket 31a inside the forward tilling shaft 64, and the outer mounting bracket 3
1b is provided with one forward rotation anchor claw 27a. Also, 1 is attached to the mounting bracket 31c inside the reverse tilling shaft 65.
There are provided three inverted anchor claws 27b, and three inverted tilling claws 26c to 26e are provided on the outer mounting bracket 31d.

According to this embodiment, the forward rotation tilling shaft 64 and the reverse rotation tilling shaft 65 are provided with the forward rotation anchoring claws 27a and the reverse rotation rotation rotating nails 27b at the opposite ends, respectively. The forward rotation anchor claw 27 that rotates the grass to be wound on the reverse tilling shaft 64 or the reverse rotation tilling shaft 65 in the reverse direction.
a and the reversing anchor claws 27b can be loosened to reduce the winding of grass.

In the eleventh embodiment shown in FIG. 16, the mounting bracket 31a inside the forward rotation tilling shaft 64 is provided with two forward rotation tilling claws 26a and 26b, and the outer mounting bracket 3
One forward tilling claw 26c is provided in 1b. A single reverse tilling claw 26 d is provided on the mounting bracket 31 c inside the reverse tilling shaft 65, and the middle mounting bracket 3
1d is provided with one reversing anchor claw 27a, and the outer mounting bracket 31e is provided with two reversing tilling claws 26e,
26f is provided.

According to this embodiment, in the reverse tilling shaft 65, the inner reverse tilling claw 26 d and the outer reverse tilling claw 26 d are formed.
e, 26f, so that the reversing anchor claws 27a are arranged so as to be sandwiched by the common reversing anchor claws 27a, the inner reversing tilling claws 26d and the outer reversing tilling claws 26e, 26f.
Can be reliably suppressed.

In the twelfth embodiment shown in FIG. 17, two forward tilling claws 26a and 26b are provided on the mounting bracket 31a inside the forward tilling shaft 64, and the second One forward rotation tilling claw 26c is provided, one forward rotation anchoring claw 27a is provided on the third mounting bracket 31c from the inside, and two forward rotation tilling claws 26d, on the outer mounting bracket 31d. 26e is provided. In addition, the mounting bracket 31 inside the reverse tilling shaft 65
e is provided with one reverse tilling claw 26f, and two outer tilling claws 26g and 26h are provided on the outer mounting bracket 31f.
Is provided.

According to this embodiment, the forward rotation anchor claw 27a is sandwiched between the forward rotation tilling claws 26a to 26c located inside and the forward rotation tilling claws 26d and 26e located outside on the forward rotation tilling shaft 64. Since they are arranged, the forward rotation tilling claws 26a to 2 located on the inner side with the common forward rotation anchor nail 27a
6c and the forward rotation tilling claws 26d and 26e located on the outside can be reliably prevented from rising.

As shown in FIG. 18, in the case where a plurality of normal rotation anchor claws 27a are provided, one normal rotation anchor claw 27a always exists between the point a and the point b whose phases are shifted by 90 °. , The effect of preventing lifting by the forward rotation anchor claws 27a can be continuously exerted without interruption, and the effect of preventing dashing can be further enhanced. For this purpose, it is necessary to set the phase difference between the adjacent normal rotation anchor claws 27a to less than 90 °. This means
The same holds for the reversing anchor pawl. The right and left halves of the rotary working machine 46 sandwiching the center line CL do not necessarily have to match the phases of the tilling claws 26a and the anchor claws 27a. One of the anchor claws 27a can be positioned between the points a and b in FIG. 18 while minimizing the number of the anchor claws 27a.

When the forward rotation anchor claws 27a bite into the soil, the forward thrust of the body decreases, and when the reverse rotation anchor claws 27a bite into the ground, the thrust in the backward direction of the fuselage decreases. If the phase of the anchor claws 27a is set so that the forward rotation anchor claws 27a and the reverse rotation anchor claws 27a always cross in the soil, the anchor claws 27a.
The fluctuation of the propulsion force of the aircraft due to the rotation of the aircraft can be suppressed.

Although the embodiments of the present invention have been described in detail, various design changes can be made in the present invention without departing from the gist thereof.

For example, in the embodiment, the tilling claws 26a to 26h
Although a tan nail was illustrated as an example, another tilling nail such as a flower nail can be used instead of a tan nail. Further, it is possible to apply the tillage unit of the first to seventh embodiments to a rear tine tiller T, and conversely, to apply the tillage unit of the eighth to twelfth embodiments to a front tine tiller T. It is possible.

[0080]

As described above, according to the first aspect of the present invention, since the tilling shaft having the tilling claw and having the forward rotation is provided with the anchor claw whose tip is curved toward the rotation direction advance side, the tilling shaft is provided with the tilling claw. Also, even in a hard field, it is possible to suppress the lifting of the tilling nail by piercing the anchor nail into the soil. as a result,
The tilling claw can be reliably cut into the soil to exert the tilling performance, and also the dashing of the machine due to the lifting of the tilling claw can be prevented.

According to the second aspect of the present invention,
The tilling claw whose tip is curved to the rotation direction delay side and the anchor claw whose tip is curved to the rotation direction advance side are arranged in the same rotation plane, and the tip of the tilling claw and the tip of the anchor claw approach each other. As a result, grass is less likely to enter between the tip of the tilling nail and the tip of the anchor nail, and the winding of grass can be reduced.

According to the third aspect of the present invention,
Anchor claws are provided at the axially outer ends of the tilling shafts extending to the left and right sides from the transmission case, so that the tilling claws provided at the outer ends of the left and right cultivating shafts can be prevented from rising, thereby improving the straightness of the cultivator. .

According to the invention described in claim 4,
Anchor claws are placed between the rotating surfaces of the cultivating claws on the outside and the inside in the axial direction, so that the thrust generated by the cultivating claws is prevented from being hindered by the anchor claws, and the tilling performance and the anti-dashing performance are secured. And securing of propulsion can be achieved at the same time.

According to the invention described in claim 5,
Since the tilling nail and the anchor nail are attached with a phase difference of 180 °, the tilling performance can be improved by alternately acting the tilling nail and the anchor nail.

According to the invention described in claim 6,
As a wide soil release surface was formed at the tip of the anchor claw,
When the anchor claws cut into the soil go out into the air, the soil can be repelled by the soil release surface and finely crushed.

According to the invention described in claim 7,
The forward tilling shaft and the reverse tilling shaft, which extend coaxially from both sides of the transmission case on both sides in the axial direction and rotate in opposite directions, are provided with tilling claws, respectively. Canceling can prevent dashing. Moreover, since the anchor claws curved in the rotation direction leading side are provided on at least one of the forward rotation tillage shaft and the reverse rotation tillage shaft, even in a hard field, the anchor claws are pierced into the soil to suppress the lifting of the tillage claw, and the tillage claw is soiled. It is possible to make sure that it is cut in the inside to exhibit the tilling performance and to prevent the dashing of the fuselage more reliably.

According to the eighth aspect of the present invention,
The tilling claw whose tip is curved to the rotation direction delay side and the anchor claw whose tip is curved to the rotation direction advance side are arranged in the same rotation plane, and the tip of the tilling claw and the tip of the anchor claw approach each other. As a result, grass is less likely to enter between the tip of the tilling nail and the tip of the anchor nail, and the winding of grass can be reduced.

According to the ninth aspect of the present invention,
Anchor claws are placed between the rotating surfaces of the cultivating claws on the outside and the inside in the axial direction, so that the thrust generated by the cultivating claws is prevented from being hindered by the anchor claws, and the tilling performance and the anti-dashing performance are secured. And securing of propulsion can be achieved at the same time.

According to the tenth aspect of the present invention, since the anchor claws of the forward tilling shaft and the reverse tilling shaft are opposed to each other, it is desirable to wind around the forward tilling shaft or the reverse tilling shaft. Grass to be loosened can be loosened with an anchor claw rotating in the opposite direction to reduce winding of the grass.

According to the eleventh aspect of the present invention, since the forwardly rotating anchor claws and the reversely rotating anchor claws intersect in the soil, the anchoring claws which reverse the resistance generated by the forwardly rotating anchor claws. And the propulsion generated by the vehicle can be offset to stabilize the traveling speed of the aircraft.

[Brief description of the drawings]

FIG. 1 is an overall side view of a front tine walking rotary tiller.

FIG. 2 is a view in the direction of arrows in FIG. 1;

FIG. 3 is a view taken along line 3-3 in FIG. 2;

FIG. 4 is a perspective view of a tilling part.

FIG. 5 is a perspective view of a tilling unit according to a second embodiment of the present invention.

FIG. 6 is a perspective view of a tilling unit according to a third embodiment of the present invention.

FIG. 7 is a perspective view of a tilling unit according to a fourth embodiment of the present invention.

FIG. 8 is a perspective view of a tilling unit according to a fifth embodiment of the present invention.

FIG. 9 is a perspective view of a tilling unit according to a sixth embodiment of the present invention.

FIG. 10 is a perspective view of a tilling unit according to a seventh embodiment of the present invention.

FIG. 11 is an overall side view of a rear tine walking rotary cultivator according to an eighth embodiment of the present invention.

FIG. 12 is an enlarged sectional view taken along line 12-12 of FIG. 11;

FIG. 13 is a perspective view of a tilling part.

FIG. 14 is a perspective view of a tilling unit according to a ninth embodiment of the present invention.

FIG. 15 is a perspective view of a tilling unit according to a tenth embodiment of the present invention.

FIG. 16 is a perspective view of a tilling unit according to an eleventh embodiment of the present invention.

FIG. 17 is a perspective view of a tilling unit according to a twelfth embodiment of the present invention.

FIG. 18 is a diagram showing a mounting phase of an anchor pawl.

[Explanation of symbols]

13 Transmission Case 24 Tilling Shaft 26a-26h Tilling Claw 27a-27d Anchor Claw 27 ₁ Soil Release Surface 41 Tilling Mission Case (Mission Case) 64 Forward Tilling Shaft 65 Reverse Tilling Shaft E Engine

Claims (11)

[Claims] 1. A rotary tiller having a tilling claw (26a-26f) provided on a tilling shaft (24) extending right and left from a transmission case (13) and driven forward by an engine (E). Anchor claw (27a) curved toward the rotation direction advance side
To 27 d) provided on a tilling shaft (24). 2. An anchor claw (27a) is provided in a rotation plane of a tilling claw (26a to 26f) whose tip is curved to the rotation direction delay side.
The rotary tiller according to claim 1, wherein the tip of the tilling claw (26a to 26f) and the tip of the anchor claw (27a to 27d) are brought closer to each other. 3. The rotary tiller according to claim 1, wherein an anchor claw is provided at an axially outer end of the tilling shaft. 4. An axially outer tilling claw (26a to 26f)
Rotating surface and cultivating claw on the inside in the axial direction (26a to 26f)
The rotary tiller according to claim 1, characterized in that anchor pawls (27a to 27d) are provided between the rotation surfaces of the rotary cultivator. 5. The rotary tiller according to claim 1, wherein the tilling claws (26a to 26f) and the anchoring claws (27a to 27d) are arranged on opposite sides of the tilling shaft (24). 6. The soil release surface (27 ₁ ) wider than the base end portion is formed at the distal end portion of the anchor claw (27a to 27d). Rotary tiller. 7. A forward tilling shaft (64) extending from the transmission case (41) to both sides in the axial direction and driven forward by the engine (E), and coaxially outside the forward tilling shaft (64) in the axial direction. The reverse tilling shaft (65) which is disposed on the upper side and driven in reverse by the engine (E), respectively
26h), in at least one of the forward rotation tillage shaft (64) and the reverse rotation tillage shaft (65), the anchor claw (27a, A rotary cultivator comprising: 27b). 8. An anchor claw (27) is provided in a rotation surface of a tilling claw (26a to 26h) whose tip is curved to a rotation direction delay side.
a, 27b) is provided, and the tip of the tilling claw (26a-26h) and the tip of the anchor claw (27a, 27b) approach each other, The rotary tiller according to claim 7, characterized in that: 9. An axially outer tilling claw (26a to 26h)
Rotating surface and cultivating claw on the inner side in the axial direction (26a to 26h)
The rotary cultivator according to claim 7, characterized in that anchor claws (27a, 27b) are provided between the rotation surfaces of the rotary cultivator. 10. An anchor claw (27a, 27b) provided on a forward tilling shaft (64) and an anchor claw (27a, 27b) provided on a reverse tilling shaft (65) are arranged adjacent to each other in the axial direction. The rotary cultivator according to claim 7, characterized in that: 11. An anchor claw (27a, 27b) provided on a forward tilling shaft (64) and an anchor claw (27a, 27b) provided on a reverse tilling shaft (65) intersect in soil. The rotary cultivator according to claim 7, which performs the rotation.