JP2000041409A - Device for leveling tilled soil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for leveling tilled soil, making it possible to simply switch the leveling degree of the tilled soil surface leveled by the rear cover of a rotary tiller. SOLUTION: This device for leveling tilled soil is obtained by disposing a vertically movable rear cover 4 having a leveling plate 3 for leveling or puddling the surface of soil at the rear end of a tilling cover 2 covering the upper peripheral portion of rotary tilling tines 1, and further disposing a rear cover lock lever 5 for switching the rear cover 4 into a free position A for largely vertically swinging the rear cover 4 receiving the resistance of soil or into a lock position B for stopping and limiting the upward movement of the rear cover 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilling soil leveling device, which can be used for a rotary tilling device mounted on the rear side of a riding tractor, for leveling a tilling soil surface by a rotary tilling device, or performing a scraping operation. Things.

[0002]

Problems to be solved by the invention When leveling a tilled soil surface or performing a scraping work, depending on the depth of the soil, the cultivation depth, etc.
The leveling of the leveling plate is changed or adjusted so that appropriate leveling and burying are performed. For this reason, there is a form that switches between a state in which the rear cover is raised and lowered to the rear end and leveling while scraping the soil surface, and a state in which it is simply leveled with a leveling plate. It is difficult to respond to changes in

[0003]

SUMMARY OF THE INVENTION The present invention is directed to a rear cover which has a leveling plate 3 for leveling or replacing the soil surface at the rear end of a tilling cover 2 which covers an upper peripheral portion of a rotary tilling claw 1 and which moves up and down. And a rear cover lock lever 5 that switches between a free position A in which the rear cover 4 swings up and down greatly due to soil resistance and a lock position B in which the upward movement is locked to limit the upward movement. The structure of the tilling soil leveling device will be adopted.

[0004]

The soil surface tilled by the tine 1 is leveled or replaced by the rear cover 4 and the leveling plate 3 on the rear side. When the rear cover lock lever 5 is operated to the free position A, the rear cover 4 and the leveling plate 3 are in a state where they can swing greatly up and down.
The surface of the plowed soil is leveled by the automatic method.

[0005] When the rear cover lock lever 5 is operated to the lock position B, the upward movement of the rear cover 4 or the like can be restrained and locked even if the soil surface is deep.
The upward movement of the rear cover 4 or the leveling plate 3 with respect to the tillage cover 2 can be restricted to enhance the leveling action or leveling force on the soil surface. In this way, by the switching operation of the rear cover lock lever 5, the leveling action of the cultivated soil surface can be switched according to the cultivated soil, the soil depth, and the like, and the leveling effect with the soil closing effect can be easily performed. be able to. In particular, the movement and leveling of the partial soil in the field can be easily performed by lever operation.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A tractor body 6 travels by driving front wheels 8 steerable by a steering handle 7 and rear wheels 10 on both sides of a cockpit 9 by an engine 12 in a hood 11. In a four-wheel drive running mode, a rotary tilling device 16 is connected to a rear portion by a three-point link mechanism including a lower link 14 and a top link 15 that can move up and down by a liftome 13, and this input shaft 17 is connected to the rear end of the vehicle body 6. PT
In conjunction with the O-axis 18, the tilling shaft 19 having the tilling claw 1 of the tilling device 16 can be driven and rotated to perform tilling.

Reference numeral 20 denotes a transmission case of the tilling device 16, 21 denotes a side case for bearing the tilling shaft 19, and 22 denotes a side arm. 23 is a mast connecting the top links 15. The cultivation cover 2 is provided on the rotation upper peripheral portion of the cultivation claw 1, and the rear cover 4 is connected to the rear side of the cultivation claw 1 via a rubber plate 24 so that the cultivation cover 2 can freely move up and down and can tilt left and right. Connected.

The rear cover 4 is connected to and supported by two brackets 25 on the left and right on the cultivation cover 2 via a leaf spring 26. Also, at the lower end of the rear cover 4,
The leveling plate 3 is connected to the pins 27 so as to be vertically rotatable, and the mast 2
3 and the center of the leveling plate 3 are connected by links 28 and 29 to support the leveling posture of the leveling plate 3. Three
Reference numeral 0 denotes a tooth disposed at the lower end of the rear cover 4, and 31 denotes a tooth disposed below the flat plate 3. 33 is a tension spring connecting between the link 28 and the mast 23. Side equalizing plates 32 are provided on both left and right ends of the equalizing plate 3 so as to be freely foldable and detachable.

The tilling shaft 19 is operated by the interlocking of the input shaft 17.
Is rotated, and the tilling claw 1 performs tilling. This cultivated soil is the cultivation cover 2, the rubber cover 24 on the rear side,
Also, the rear cover 4 and the like prevent scattering upward and rearward, and are leveled by the leveling plate 3 at the lower end. The rear cover 4 or the flat plate 3 depends on the unevenness of the cultivated soil and the tillage depth.
While swaying left and right with respect to the cultivation cover 24, the soil surface is leveled by the three flat plates. The leveling resistance is not only the rubber plate 24 but also the leaf spring 26 and the link 2.
The springs 33, which repel springs 8, 29, can be leveled or scraped while receiving the soil by their own weight or the like.

The leaf spring 26 is connected such that its upper end is slidable back and forth by fitting a pin 34 and an elongated hole 35 of the bracket 25. The lower surface of the upper end of the leaf spring 26 is supported by a rear end portion of a support arm 38 which is rotatable up and down around a pin 36 with respect to the bracket 25 and is resiliently supported by a spring 37. A spring support 39 for receiving the front end of the spring 37 is moved forward and backward by a lever 40 to adjust the spring force and change the support angle of the leaf spring 26, so that the rear cover 4
And leveling pressure on the soil surface of leveling plate 3 (Fig. 10).
It can be switched to weak (FIG. 11).

The support load of the spring 37 can be increased or decreased by the lever 40. As shown in FIG. 10, when the lever 40 is operated to the lower side L, the plate 85 having the spring receiver 39 integrated therein guides the front and rear key long holes 86 and the long holes 87 by the guide pins 88 and 36, Spring catch 39
To the rear side. The spring 37 around the guide rod 89 inserted into the spring support 39 is compressed, and the support arm 38 that can rotate vertically about the pin 36 integrated with the bracket 25 is pressed against the rear leaf spring 26 side. By increasing the supporting force, the force for lifting the rear cover 4 and the flat plate 3 is increased. The work in this state is suitable for finishing the soil surface or reducing the pressing force for pressing the ground such as sand.

The tillage device 1 is lifted by the lift arm 13.
When the lift 6 is lifted up, the leaf spring 26 is pulled downward by its own weight of the rear cover 4 or the like, and the pin 34 is moved rearward along the elongated hole 35 of the bracket 25, so that the rear cover 4 or the flat plate 3 or the like is moved. Move down. Also, the lift arm 13
When the rotating part of the tilling claw 1 is caused to act on the soil by lowering the plate spring 26 and the pin 34 via the rear cover 4 and the leveling plate 3 etc.
Is guided to the front side through the long hole 35, and the leveling position is raised.
When the pin 34 is locked at the front end of the elongated hole 35, the tension of the leaf spring 26 acts, and the leveling force is increased.

Further, as shown in FIG. 11, when the lever 40 is operated upward to reduce the elastic force of the spring 37, the supporting force of the leaf spring 26 by the supporting arm 38 is weakened. The leveling force of the flat plate 3 etc. is increased by increasing the descending area. As the work in this case, it is suitable for a scraping work at a high speed running or a work for moving clayey soil. In this case, the operation of the lever 40 allows the long hole 86 of the plate 85,
87 is located at the upper front with respect to the guide pins 88 and 36.
When the tilling apparatus 16 is lifted up, the pin 34 of the leaf spring 26 moves to the rear end side of the long hole 35, and the rear cover 4, the leveling plate 3 and the like descend by their own weight. When the tilling device 16 is lowered to the working posture, the leaf spring 26 and the pin 34
5 is pushed up to the front end, and the leveling force by its own weight also works strongly.

The upper link 28 is vertically rotatably connected to the mast 23 by a pin 41.
A plate 4 which is rotatable up and down around a pin 42 with respect to 3
3. The rod 43 connected to the plate 43 and the pin 44 and the pin 57 are connected to each other to move the flat plate 3 up and down.
The rod 45 and the plate 43 are connected to the pin 4
Rotate up and down two turns.

The vertical rotation of the leveling plate 3 and the plate 43 can be restricted and locked by the rear cover lock lever 5 provided on the mast 23, the leveling lock lever 46, and the like. Further, a hook arm 48 pivoted by a lever 47 is pivotally attached to the link 28 by a pin 49, and the spring 3
The arm 50 and the lever 51 for locking the arm 3 are integrally pivotally connected with the pin 52, and the locking pin 53 at the base of the arm 50 is switched to and engaged with the hooks 54 and 55 on the front and rear sides of the hook arm 48. Thereby, the tension of the spring 33 can be changed, and the upward turning force of the link 28 around the pin 41 can be changed.

The lever 51 is pivoted rearward to lock the pin 53.
Is engaged with the hook 54 on the front side, the tension of the spring 33 is increased to increase the lifting force above the leveling plate 3, and conversely, the lever 51 is rotated to the front side to release the locking pin 53. By engaging with the hook 55 on the rear side, the lifting force of the flat plate 3 by the spring 33 can be reduced, and the leveling force can be switched between strong and weak. The lever 47 is for rotating the hook arm 48. 56 is a stopper for locking the rotation of the hook arm 48.

The rear cover lock lever 5 has a pin 5
8 can be rotated back and forth, and the lower stopper arm 59
Can be switched between inside and outside of the rotation zone of the plate 43. When the rear cover lock lever 5 is rotated to the free position on the front side, the stopper arm 59 is out of the rotation range of the plate 43, and the rotation of the plate 43 around the pin 42 is freely performed. , 29, etc., to make the connected leveling plate 3 easily move upward.

When the rear cover lock lever 5 is rotated to the lock position B on the rear side, the stopper arm 59 is in a rotation range where it can be engaged with the plate 43, and the plate 43 is rotated upward by a certain amount or more. And the upward rotation of the leveling plate 3 from the lower moving leveling area is stopped, so that the leveling force and the soil pulling force are strengthened. Reference numeral 60 denotes a toggle spring that maintains the switching positions A and B of the rear cover lock lever 5 and the stopper arm 59.

The leveling lock lever 46 can rotate the lock hook 61 around the pin 63 against the toggle spring 62. The lock hook 61 can be engaged with the lock pin 64 of the plate 43. It can be switched between state C and disengaged state D. When the tilling device 16 is lifted off the ground by raising the lift arm 13, the rear cover 4
The plate 43 is moved downward by its own weight, such as the flat plate 3 or the like, so that the plate 43 is rotated downward around the pin 42, and the lock pin 64 is positioned in the engagement area of the lock hook 61. Leveling rock lever 4
When the lock hook 61 is rotated to the engagement position C by operating the lock 6 in the engagement state C, the lock hook 61 can be engaged, and the leveling plate 3 can be hung down and fixed in the soil closing state E.

When the leveling plate 3 is in a free up and down state, the leveling lock lever 46 is operated to a non-engaged state D,
The lock hook 61 is disengaged from the lock pin 64 of the plate 43, and the rear cover lock lever 5 is operated to the free position A, so that the plate 43 can be turned up and down. The links 28 and 29 for supporting the flat plate 3
May be formed in an arc shape as shown in FIG.

In FIG. 6, the point different from the above example is that the support arm 38 is moved by the lever 40 and the support arm 38 mechanism for adjusting the support position of the leaf spring 26 is replaced with the rear bracket 25 of the tilling cover 2. On the other hand, there is provided a movable bracket 68 which can be turned up and down around a support pin 66 by a set pin 67 which can be pulled out to change the inclination angles F and G of the leaf spring 26.

The set pin 67 of the movable bracket 68
, The height of the rear cover 4 and the leveling plate 3 can be changed up and down, and the leveling force at leveling can be switched between strong and weak.
The pin 34 at the front end of the leaf spring 26 is
Into the slot. Reference numeral 70 denotes a stopper pin for supporting an intermediate portion of the leaf spring 26 at a rear portion of the movable bracket 68.

When the rearward inclination of the movable bracket 68 is increased by replacing the pin 67, the rearward inclination angle of the leaf spring 26 is also increased, and the rear cover 4 and the leveling plate 3 are caused to swing up and down by lowering the lower movement range F. While leveling, increase the amount of leveling soil movement. When the rearward tilt angle of the movable bracket 68 is reduced, the leaf spring 26 is moved upward, and the rear cover 4 and the leveling plate 3 are moved up and down with the lower movement range G being higher than F. The amount can be reduced.

In FIG. 7, the point different from the above example is that the leaf spring 2 for adjusting the leveling pressure of the rear cover 4 and the leveling plate 3 is used.
6 to the bracket 25 with the pin 71
It can be adjusted by moving it up and down by an arm 72 that rotates around. Reference numeral 73 denotes a turnbuckle between the rear cover 2 and the arm 72, and the angle of the arm 72 can be adjusted. 7
Reference numeral 4 denotes an elongated hole formed in the bracket 25 for guiding the stopper pin 70.

In FIG. 8, a different point from the above example is that a stopper pin 70 for supporting an intermediate portion of the leaf spring 26 is rotatably supported at a fixed position of a bracket 68, and a pin lever integrated with the stopper pin 70 is provided. Lock pin 76 on 75
The socket 77 is fitted, and is springed outward by a spring 78. The lock pin 76 has an elongated hole 79 of the bracket 68.
Can be switched between a front locking position H and a rear free position K.

When the lock pin 76 is moved to the free position K by the pin lever 75, the distance between the lock pin 76 located above and below the leaf spring 26 and the stopper pin 70 is increased, and the vertical swing range of the leaf spring 26 is increased. As a result, the rear cover 4 can freely escape upward with the uniform pressure. However, when the lock pin 76 is guided to the elongated hole 79 and moves to the lock position H, the leaf spring 26
And the stopper pin 70, it is difficult to move upward, and the moving force of the soil by leveling can be increased.

FIG. 9 differs from the above example in that a U-shaped guide 81 is provided on a lever 80 rotatable around the pin 34 of the bracket 25 so as to be clamped from the upper and lower surfaces of the leaf spring 26. The stopper pin 70 for supporting the base is formed in a ten-handed shape so that it can be turned up and down along an arc-shaped long hole 82 and can be switched. Maintain position.

When the leaf spring 26 is lifted by operating the guide 81 upward with the lever 80, the stopper pin 70
Is switched up and down along the long hole 82. When the stopper pin 70 is located at the upper end side of the long hole 82, the leaf spring 2
When the leveling force of the rear cover 4 and the like is reduced by the support of 6, and the stopper pin 70 is positioned at the lower end side of the elongated hole 82, the lower movement range of the leaf spring 26 increases, and the leveling force also increases.

[Brief description of the drawings]

FIG. 1 is a side view of a tillage device.

FIG. 2 is a side view showing the operation and a rear view of a part thereof.

FIG. 3 is a side view showing another embodiment and showing the operation thereof.

FIG. 4 is a perspective view of a tillage device.

FIG. 5 is an overall side view when mounted on a tractor.

FIG. 6 is an operational side view showing a partially different embodiment.

FIG. 7 is a side view showing another embodiment.

FIG. 8 is a side view showing another embodiment, and a rear view of a part thereof.

FIG. 9 is a side view and a perspective view showing another embodiment.

FIG. 10 is a side view showing a part of the operation of FIGS.

FIG. 11 is a side view showing a part of the operation of FIGS.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tilling nail 2 Tilling cover 3 Flat plate 4 Rear cover 5 Rear cover lock lever A Free position B Lock position

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshio Takechi 1 Eighth-Yakura, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd. Department F-term (reference) 2B033 AA05 AB01 AB11 AC04 DB35 DB39 DB40 DB42 DB43 2B034 AA03 BA06 BB02 BC06 BD08 EA14 EB05 EB06 EB33

Claims (1)

[Claims] 1. A rear cover 4 covering the upper peripheral portion of a rotary tilling claw 1 and a rear cover 4 having a leveling plate 3 for leveling or replacing the soil surface is provided at the rear end of the tilling cover 2 so as to move up and down. Free position A that swings up and down greatly due to soil resistance
And a rear cover lock lever 5 for switching to a lock position B for locking the upward movement and restricting the upward movement.