JPH09313002A - Rotary tiller having tillage tine partially rotating reverse - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary tiller having tillage tines partially rotating reverse capable of reducing an unplowed soil and avoiding carrying clods about by cross reverse tillage tines by forming the reversely rotating tillage tines out of the cross tines close to a tillage transmission case and setting the nearest position of the cross reverse tillage tines at the vertically lower position of the axis of the tillage tines. SOLUTION: Left and right cross reverse tillage tines 8 are formed to get nearest at about vertically lower position of an axis of the tillage times 8 to the ground in a tillage-operating state of the rotary tiller R having the tillage tines 8 partially rotating reverse. The reversely rotating tillage tines 8 are formed out of cross tillage tines close to a tillage transmission case A, composed by total four tines, left and right two tines each and each left or right two tines is arranged at an interval of 180 degree and both left and right four tines are arranged at an interval of 90 degree.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arrangement of reverse cultivating pawls of a partially reversing rotary tiller in a structure equipped with a partially reversing rotary tiller as a working machine for a walking tiller.

[0002]

2. Description of the Related Art Conventionally, it has been known that a walk-type cultivator is equipped with a partially reversing rotary cultivator as a working machine. For example, Japanese Patent Laid-Open No. 6-3433
No. 10, JP-A-6-303801, JP-A-6-197604, JP-A-7-79601, and Japanese Patent Publication No. 46-39041.

[0003]

The problems to be solved by the present invention are as follows. The present invention is a cultivator equipped with a partially reversing rotary cultivating device, wherein the drive mechanism is a center drive type cultivating device, and the portion of the cross claws adjacent to the cultivating mission case is a reversing cultivating claw and is configured by the reversing cultivating claw. The cross claw portion is configured to cross at a position vertically below the tilling claw axis. As a result, the lower surface of the tillage mission case is configured so as not to slip on the portion of the untilled soil.

In the conventional rotary tiller having only forward rotation plowing pawls, since the cross pawls are also normal rotating plowing pawls, the crossing portion of the cross pawls is arranged rearward of the vertically downward direction of the tilling pawl shaft. However, there was a problem that it was not possible to completely cultivate the lower part of the tillage mission case, uncultivated land was generated, and the cross claws slipped on the uncultivated soil below the tiller mission case. The present invention reduces the amount of uncultivated land by cultivating just below the tillage claw shaft.

Further, in the structure in which the cross claw portion is a reverse cultivating claw, the cross reverse cultivating claw is provided on each of the left and right sides.
As one book, one on the left and one on the right is placed at 180 degrees, and the four on both the left and right are placed at every 90 degrees to prevent the cross-reversing tillage claws 8 from holding the cultivated soil and to cultivate the cultivated soil. It is configured to be able to fly completely to the left and right of the. Conventionally, the cross reverse cultivating claw was composed of three claws, so between these three claws,
There was a problem that the soil clods of the cultivated soil were held and it was not possible to completely repel it forward, but this point could be resolved.

[0006]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. According to the first aspect of the present invention, in the configuration in which the partially-reversing rotary tiller R is attached to the rear part of the tiller, in a state of tilling work by the partially-reversing rotary tiller R, below the substantially vertical portion of the tiller claw shaft with respect to the ground. The left and right cross reversible tilling claws 8 are configured to be closest to each other.

According to a second aspect of the present invention, in the structure in which the partially reversing rotary tiller R is attached to the rear part of the tiller, the reversing tiller claw 8 is a cross tiller claw closest to the tiller mission case A, and the reverse tiller claw 8 is left and right. There are a total of four, two on each side, and two reverse cultivating pawls 8 on the left and right are placed at 180 ° intervals, and four reverse cultivating pawls 8 on both left and right are placed at 90 ° intervals. In a configuration in which a partially reversing rotary tiller R is attached to the rear portion of the machine, a cultivator B is arranged at the rear portion of the rotation locus of the reversing tiller claw 8.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described. FIG. 1 is an overall side view of a cultivator equipped with a partially reversing rotary tiller R, FIG. 2 is an overall plan view of the same, FIG. 3 is a side view of a drive unit of a traveling drive unit and a partially reversing rotary tiller, and FIG. 5 is a rear cross-sectional view of the drive unit of the partially reversing rotary tiller, FIG. 6 is a rear view of the partially reversing rotary tiller and the single tail wheel 3, and FIG.
Is an enlarged side view showing a portion of the reverse cultivating pawl 8 in the cultivating state by the partial reverse rotary cultivating device R, FIG. 8 is a rear view showing a state in which the cross reverse cultivating pawl 8 is closest to the vertical lower part of the pawl shaft, and FIG. A side view showing the arrangement of the two cross reversing tillage claws 8 arranged on one of the left and right sides, FIG. 10 is a side view showing the arrangement of the four cross reversing tilling claws 8 at both the left and right sides, and FIG. 11 is a conventional 3 + 3 It is a side view which shows arrangement | positioning of the cross reverse cultivating claw 8.

The overall construction of the cultivator according to the present invention will be described with reference to FIGS. 1 and 2. The engine frame F projects forward from the traveling mission case M, and the engine frame F
The engine E is mounted and fixed on the above. A V-belt 14 is wound between the output shaft of the engine E and the pulley 20 of the input shaft 21 of the traveling mission case M. A belt tension type main clutch mechanism 16 for transmitting power by tensioning / relaxing the V-belt 14 is provided as a tension pulley mechanism.

A belt cover 15 for covering the V-belt 14 and the belt tension main clutch mechanism 16 is provided. The operation handle 1 is projected rearward from the upper part of the decorative cover 19 on the side of the belt cover 15. The operation handle 1 is composed of two left and right rectangular handles, and a main gear shift lever 10 and a tilling gear shift lever 11 are provided between the left and right handles in a protruding manner.

Further, a partial reversal rotary tiller R is arranged below the operating handle 1. The partial reverse rotation rotary tiller R includes a tillage mission case A, a forward tillage claw 7, a reverse tillage claw 8, a single tail wheel 3, and a tail wheel height adjusting device 6 for adjusting the vertical position of the single tail wheel 3. Tillage cover 9
And the like.

The tilling mission case A is integrally fixed so as to close the rear opening of the traveling mission case M, and power is supplied from the sprocket 22 inside the traveling mission case M by one chain 23. Has been transmitted. The cultivating mission case A constitutes a center drive type partial reversing rotary cultivating device R, and four reverse cultivating claws 8 are arranged at the left and right nearest parts of the central cultivating mission case A, two left and right in total. Has been done.

Since the reverse cultivating claw 8 is of the center drive type, it is necessary to cultivate the soil in the lower part of the cultivating mission case A, and the reverse cultivating claw shaft 24 is the forward cultivating claw shaft 5 in order to achieve the cross center system. With respect to the outer side, it is tilted in the direction in which it falls and is rotating. In the present invention, the reverse tillage claw shaft 24 with respect to the side surface of the tillage mission case A is used.
The mounting position is in the cultivating state, and the cross position of the cross reverse cultivating claw 8 is located directly below the normal cultivating shafts 5L and 5R. Axles 26L and 26R are projected left and right from the central traveling mission case M,
Left and right wheels 13L and 13R are attached to the axles 26L and 26R.

A main clutch lever 18 for operating the belt tension type main clutch mechanism 16 and a finger clutch lever 4 are arranged at the rear end of the left operation handle 1. Further, a pinching prevention lever 2 is arranged so as to be installed between the left and right operation handles 1, and a throttle lever 27 is provided at the rear end of the right operation handle 1. The left and right operation handles 1 are connected and reinforced by a left and right handle connecting rod 28.

Next, referring to FIGS. 3, 4, and 5, the traveling mission case M, the plowing mission case A, and their power transmission systems will be described. As shown in FIG. 3, an opening is provided on the rear surface of the traveling mission case M, and the cultivating mission case A is communicatively connected so as to close the opening. The chain 23 is configured to pass through the opening in the direction from the traveling mission case M to the tilling mission case A.

Inside the traveling mission case M shown in FIG. 4, in addition to the input shaft 21, a shift sliding gear shaft 30, a cultivating shift shaft 29, a parking brake shaft 31, and a counter shaft 32.
Is arranged. The power from the engine E is transmitted to the pulley 20 of the input shaft 21. On the input shaft 21, integral type loose fitting gears 39, 40 and 41 are loosely fitted. The fixed gears 38 and 42 are also fixed. The fixed gear 38
Engages with a fixed gear 37 on the variable speed sliding gear shaft 30 and transmits the rotation of the input shaft 21 to the variable speed sliding gear shaft 30. Sliding gears 36 and 35 are selectively slidable right and left on the speed-changing sliding gear shaft 30 while being engaged with the speed-changing sliding gear shaft 30.

When the sliding gear 36 slides to the left, it meshes with the fixed gear 43 on the parking brake shaft 31 to provide a reverse speed. Further, the sliding gear 36 is slid to the right beyond the neutral position of the center and meshes with the integral free-fitting gear 40 on the input shaft 21. Since the power is transmitted to the parking brake shaft 31 by meshing with the fixed gear 43 above 31, the first forward speed is obtained. Then, the sliding gear 35 slides to the left side to mesh with the fixed gear 44 on the counter shaft 32, and the third forward speed is obtained. Further, the sliding gear 35 crosses over the neutral position of the center and meshes with the right side integral loose fitting gear 41 to integrally configure the integral loose fitting gear 39.
Meshes with the fixed gear 43 on the parking brake shaft 31, so that the second forward speed can be obtained.

As described above, the gears of the third forward speed and the first reverse speed are transmitted to the counter shaft 32, and the sprocket 46 on the counter shaft 32 causes the left and right steering clutch mechanisms 48L and 48R to operate via the chain 47. It is transmitted to the sprocket 50 arranged. Steering clutch mechanism 48L / 48
By connecting and disconnecting R, the axles 26L and 26R are driven and the wheels 13L and 13R are rotated. The steering clutch mechanism 4
The left and right steering clutch link mechanisms 49L and 49R for connecting and disconnecting the 8L and 48R are provided, and the traveling mission case M is provided.
It can be operated outside. The steering clutch link mechanisms 49L and 49R are connected to steering clutch levers 51L and 51R provided on the left and right operation handles 1 via a push-pull wire mechanism 52.

Next, the drive mechanism of the partial reverse rotation rotary tiller R inside the traveling mission case M will be described. A fixed gear 42 on the input shaft 21 meshes with a loose fit gear 53 on the variable speed sliding gear shaft 30. The loose fit gear 53 meshes with the loose fit gear 33 on the tilling speed-change shaft 29. Also,
The fixed gear 37 on the variable speed sliding gear shaft 30 described above meshes with the loose fit gear 34 on the tilling speed variable shaft 29. Further, on the cultivating speed-changing shaft 29, there are left and right speed-changing sliding clutch bodies 54.
Numeral 55 meshes with the cultivating speed-change shaft 29 and is slidably interposed between the left and right. The shift sliding clutch bodies 54 and 55 are selectively slid to the left and right by the cultivating shift lever 11, so that the loose fitting gear 34, the loose fitting gear 33, and the shifting sliding clutch body 54 can be moved.
The high and low rotation of the tilling speed-change shaft 29 can be obtained by setting 55 to the connected state. The state in which neither of the variable speed sliding clutch bodies 54, 55 is engaged with the loose fitting gear 34 and the loose fitting gear 33 is the neutral state of the partial reverse rotation rotary tiller R.

The sprocket 22 on the cultivating transmission shaft 29
Further, the chain 23 is meshed. The chain 23 is
It is inserted into the cultivating mission case A and wound around three sprockets. Counter sprocket 56, reverse sprocket 57, forward sprocket 5
5 The forward sprocket 55 is configured to be directly engaged with the forward cultivating shafts 5L and 5R and driven.

The reverse sprocket 57 rotates forward rotation counter gears 59L and 59R on the forward rotation counter shaft 62, and the forward rotation counter gears 59L and 59R rotate on the reverse rotation tilling pawl shaft 24 and reverse rotation tilling gears 60L and 60R. Are driving. The reverse cultivating gears 60L and 60R are the reverse cultivating claw shafts 24.
Drive. Then, the reverse cultivating claw 8 is planted on the reverse cultivating claw shaft 24, and the normal cultivating claw 7 is planted on the forward cultivating shafts 5L and 5R. Further, as shown in FIG. 6, a cutout portion 61 is formed in the rubber droop G on the rear surface of the partial reverse rotation rotary tiller R.

Further, the single tail wheel 3 is arranged at the rear part of the reverse cultivating claw 8 of the cultivating mission case A. Since it is a single tail wheel 3, only one is arranged in the center. Then, a notch 61 is provided in the central portion of the rubber droop G that is stuck and hung on the rear surface of the tilling cover 9 that constitutes the partially reversing rotary tiller R, and the single tail so that the notch 61 fits. The wheel 3 is arranged. Further, the rubber dripping G is provided with a locking portion 63, and by engaging the portion of the locking portion 63 with an upper locking piece 64, the rubber dripping G is rolled up to form a cultivated soil. It is possible to bounce to the back of.

Next, the structure of the main part of the present invention will be described with reference to FIGS.
Will be explained. 7 and 8 disclose that the closest position of the cross reversing tilling pawl 8 is configured to be a position X vertically below the normal rotating tilling shafts 5L and 5R and the reversing tilling pawl shaft 24. . In the conventional rotary cultivating apparatus constituted only by the normal tilling claws, the closest position of the cross claws is arranged below the extension line of the cultivating mission case. However, in the present invention, since the cross pawl is constituted by the reverse cultivating pawl 8, it is necessary to improve the conventional configuration, and the mounting position of the reverse cultivating pawl shaft 24 is set with respect to the inclined cultivating mission case A. In the vertical direction at the time of work, the cross reversal tilling claw 8 is configured to cross at a vertically downward position X.

Next, FIGS. 9, 10, and 11 will be described. In the conventional partially reversing rotary tiller, as shown in FIG. 11, there are three left and three right reversing tillers, for a total of six reverse tilling claws. One of the left and right three is 1
They were placed every 20 degrees, and the 6 on both sides were placed at 60 degrees. However, in this configuration,
It was not possible to sufficiently throw the cultivated soil to the front by holding the cultivated soil mass with each other and holding the cultivated soil mass between the inverted tillage claws.
In the present invention, one of the two is arranged at 180 ° intervals, and the two are arranged at 90 ° intervals.

[0025]

Since the present invention is configured as described above, it has the following effects. In a configuration in which a partially reversing rotary tiller R is attached to the rear part of the tiller as in claim 1, in a state of tilling work by the partially reversing rotary tiller R, below the substantially vertical portion of the tilling claw shaft with respect to the ground. Since the left and right cross reversing tilling claws 8 are configured to be closest to each other, in the conventional rotary tiller having only the normal rotating tilling claws, since the cross claws are also the forward rotating tilling claws, the intersection of the cross claws is It is placed behind the vertical lower part of the tillage claw axis, and it is not possible to completely cultivate the lower part of the tillage mission case, and uncultivated land occurs, and the cross claw is below the tiller mission case and the uncultivated soil is left. There was a problem of slipping on. According to the present invention, uncultivated land can be reduced by cultivating just below the tillage claw shaft.

According to a second aspect of the present invention, in the structure in which the partially reversing rotary tiller R is attached to the rear portion of the tiller, the reversing tiller claw 8 is a cross tiller claw closest to the tiller mission case A, and the reverse tiller claw 8 is left and right. There will be a total of four, two on each side, and two reversing tillage claws 8 on the left and right will be placed every 180 degrees.
Since the four left and right reversing tillage claws 8 are arranged at 90 degree intervals, it is not necessary to hold and carry the tilling soil between the left and right cross reversing tillage claws 8 as in the conventional case.
Thrusting of the soil mass in the forward direction was completed.

[Brief description of drawings]

FIG. 1 is an overall side view of a cultivator equipped with a partially reversing rotary cultivating device R.

FIG. 2 is an overall plan view of the same.

FIG. 3 is a side view of a drive portion of the traveling drive device and the partially reversing rotary tiller.

FIG. 4 is a rear cross-sectional view of the traveling drive device.

FIG. 5 is a rear cross-sectional view of the drive device of the partial reverse rotation rotary tiller.

FIG. 6 is a rear view of a part of the partial reversal rotary tiller and the single tail wheel 3.

FIG. 7 is an enlarged side view showing a portion of the reverse cultivating claw 8 in the cultivated state by the partial reverse rotative rotary cultivating device R.

FIG. 8 is a rear view showing a state in which the cross reversal tilling claw 8 is closest to the vertical lower part of the claw shaft.

FIG. 9: Two cross-reversing tillage claws 8 arranged on one of the left and right sides
FIG.

FIG. 10 is a side view showing an arrangement of four right and left cross reversing tillage claws 8;

FIG. 11 is a side view showing an arrangement of a conventional three +3 cross reverse cultivating claws 8.

[Explanation of symbols]

 A Tillage mission case E Engine M Running mission case R Partial reversal rotary tiller 1 Operation handle 3 Single tail wheel 5 Forward turning tiller shaft 6 Tail wheel height adjusting device 6a Tail wheel support rod 7 Forward turning tiller claw 8 Reverse tiller claw 70 Cultivator support rod

Claims (2)

[Claims] 1. A structure in which a partially reversing rotary tiller R is attached to the rear part of the tiller, and in the state of tilling work by the partially reversing rotary tiller R, the tilling claw shaft with respect to the ground is provided.
Left and right cross reversal tilling claws 8 below the substantially vertical portion
Partial reversal rotary tiller, characterized in that 2. In a structure in which a partially reversing rotary tiller R is attached to the rear part of the tiller, the reversing tiller claw 8 is a cross tiller claw closest to the tiller mission case A, and two right and left reverse tiller claws 8 are provided. A total of four parts, two reverse cultivating claws 8 on the left and right sides are arranged at 180 ° intervals, and four reverse cultivating claws 8 on both left and right sides are arranged at 90 ° intervals. Reverse rotation rotary tiller.