JPH064651Y2 - Rotary cultivator - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial field of application The present invention makes the rear cover in a shallow tillage detecting position and a deep tilling detecting position by the inclination angle of the upper cover of the double-folded rear cover, and changes the cultivated soil surface by the lower cover. The present invention relates to a rotary cultivator capable of automatically controlling the working depth by detecting the cultivated soil.

(B) Conventional technology Conventionally, a rear cover is rotatably attached to the rear edge of a rotary cover as an automatic plowing depth control device, and the lower half of the rear cover is screwed so that the angle can be adjusted, and the upper half is plunged. The one in which the working depth is detected by interlocking with the detector and the working depth is automatically controlled based on the detection result is SHOKO 60-4105.
It is already known from publication No. 3.

In addition, immediately after the rotary tillage section, a ridge builder is attached, and auxiliary covers are pivotally attached to the lower left and right sides of the rear cover made of a single body.The rear cover is located above the ridge, and the top of the ridge is supported by the auxiliary cover. With the pressure rod on which the coil spring of the auxiliary cover is interposed inserted into the rear cover, the coil spring is compressed and the grounding is performed along the rear cover, and the locking pin is removed. When cultivating and raising the rotary cultivator when pillowing, the elastic force of the coil spring causes the auxiliary cover to move away from the rear cover and move the soil to the recess,
It is known from Japanese Utility Model Publication No. 56-49362 that plowing is carried out with the pressure rod fixed to the rear cover while the auxiliary cover is brought close to the tilling part.

(C) Problems to be solved by the invention Among the known inventions, the former has a narrow adjustment range because the former adjusts the inclination angle of only the lower half of the rear cover to deal with shallow plowing and deep plowing. The soil is clogged and the adjustment is troublesome.Besides, the soil thrown from the tiller collides with the rear cover irregularly, and the soil depth is detected by contacting the uneven soil surface. There is a problem such as stability, and in the latter case, when the locking pin is pulled out for cultivating work, the auxiliary cover is separated from the rear cover only when the rotary cultivator is raised on the headland, and the cultivating work is performed. Since the auxiliary cover is always along the rear cover, the auxiliary cover does not have to level the cultivated soil independently of the rear cover. When used for depth detection, detection The accuracy deteriorates. Separately from this, when performing cultivating with the pressure rod fixed to the rear cover with the locking pin while the auxiliary cover is close to the tilling part, when the auxiliary cover moves up and down following the unevenness of the cultivated soil surface, Since the rear cover rotates up and down together with the auxiliary cover regardless of the height of the ground contact portion, when this is applied to detecting the working depth, the detection accuracy is significantly reduced.

Further, in any of the above cases, the soil mass thrown by the tilling claws collides with the auxiliary cover that is substantially integrated with the rear cover, so that the impact causes the rear cover to swing and the working depth to be constant even if the working depth is constant. The detector erroneously detected that the working depth had changed.

(D) Means for Solving the Problems The present invention is a cultivator in which a rotary cover is provided on an upper part of a rotary tiller and a rear cover is pivotally attached to a rear portion of the rotary cover so that the rear covers are mutually attached. Consists of an upper rear cover that can be bent and a lower rear cover.The upper rear cover is linked to the rotary cover so that the vertical angle can be adjusted to maintain a certain posture after adjusting the angle, and the lower rear cover can swing back and forth on the upper rear cover. In addition to being linked to the tilling depth detector, the auxiliary rear cover is pivotally attached to the lower surface of the upper rear cover,
The above-mentioned problem is solved by elastically holding the auxiliary rear cover in a state of being separated from the rear cover by a pressure rod to a rear portion from the pivotal attachment portion of the upper rear cover.

(E) Action When performing standard tillage or deep tillage, the upper rear cover, which has an extremely gentle slope, is set by rotating it upward, and the lower rear cover is tilted rearward and upward, and the lower rear cover is held so that it can move up and down. When the lower end of the rear cover rises greatly and standard or shallow tillage is performed, the upper rear cover is rotated downward to set it, and the lower rear cover is rotated forward and downward without contacting the rotation path of the tilling pawl to hold it. Then, the lower end of the lower rear cover largely descends.

In addition, when performing plowing work, the soil cultivated by the plowing claws is received by the auxiliary cover and is leveled once, and the lower rear cover behind it is leveled and oscillated while conforming to the height of the leveling plane. The angle change is detected by the detector, and the cultivating device is automatically moved up and down based on the detection result, and cultivated at a constant plowing depth.

During such cultivating work, the upper rear cover and the lower rear cover are not screwed together unlike the conventional ones, but are simply connected so that they can be bent, so there is little soil and the angle can be easily adjusted. Is.

(F) Embodiments An embodiment of the present invention will be described with reference to the drawings. The tiller is mounted on the rear part of the tractor by a three-point link or the like as in the conventional device, and the input shaft 2 of the transmission case 1 is connected to the tractor. The horizontal shaft 3 which is connected to the PTO shaft by a universal joint and extends laterally from the transmission case 1 drives the cultivation shaft equipped with the cultivation claws 6 ... The front upper part is connected to the lift arm 9 via the top link 8, and the middle part of the tool bar 10 whose front end is pivotally attached to the lower part of the support 7 is connected to the lift arm 9 by the working depth adjusting rod 12 having the handle 11 on the upper part. Since it is connected to the rear upper part, when the handle (11) is rotated, the toolbar 10 tilts up and down around its front end.

The rear cover 13 includes an upper rear cover 13a and a lower rear cover 13
b is rotatably connected by a horizontal support shaft 15, and the front end of the upper rear cover 13a is rotatably connected to the rear edge of the rotary cover 17 by a shaft 16,
The bracket 18 which is erected on the upper surface of the upper rear cover 13a
The posture maintaining member 21 connected by a pin 20 to the handle 20 is provided with a handle 19 projecting on the upper surface near the rear and a lateral locking pin 22 fitted and inserted in the front.
And a fan-shaped cam 26 having a lever 24 is supported by a shaft 27 so as to be tiltable back and forth at the rear of a support arm 25 extending rearward from a cylindrical casing 23 accommodating the horizontal shaft 3. Together with the base of the lever 24 and the lower surface of the support arm 25, a toggle spring is provided.
28 is stretched, and a long hole 29 in the front-rear direction is projected below the shaft 27, and the locking pin 22 is fitted into this long hole 29 to form a long hole 29.
When it is located at the front part of the cam 26, the cam 26 is tilted forward by the lever 24 so that the toggle spring 28 goes over the shaft 27, and the locking pin 22 is locked at the front end surface of the cam 26. As shown in FIGS. 1 and 4, 13a is held in a posture in which the rear portion is slightly lower and is substantially horizontal, and the lower rear cover 13b is attached to the lower end of the pressure rod 30 which is vertically held in the rear portion of the tool bar 10. It is pivotally supported and elastically held by upper and lower springs 30a, 30a whose position can be adjusted by a pin 20, and in this set state, standard tillage or deep tillage is performed.

Further, when the upper rear cover 13a is lifted by the handle 19 and the cam 26 is tilted rearward by the lever 24 and then the upper rear cover 13a is lowered, the engagement pin of the posture maintaining member 21 is lowered.
22 moves rearward along the long hole 29 and is locked by the rear end surface of the cam 26 as shown in FIG.
13a pivots largely downward, and when the pressure rod 30 is set to the lower position, the lower edge of the lower rear cover is largely adjusted downward so that it becomes suitable for standard tillage or shallow tillage.

As shown in FIG. 2, a plurality of pipes 32, ... Are fixed to the upper rear surface of the auxiliary rear cover 31 at intervals, and the pipes 32 ,.
By fixing a plurality of pipes 33 · · that are inserted between the pipes, and inserting the shaft 35 into these pipes 32 · ·, 33 · · in a removable manner, the auxiliary rear cover 31 can swing back and forth on the upper rear cover 13a. And a pair of left and right brackets 36, 36 projecting from the rear surface of the auxiliary rear cover 31, each having a plurality of locking holes 37.
A long hole in which the lower end of the pressure rod 37 having a ... Is pivotally attached by the pins 36a, 36a, and the upper part thereof is bored in the upper rear cover 13a.
An R pin in which the R pin 39 is inserted into the locking hole 37a corresponding to the upper surface of the upper rear cover 13a and is suspended while the lower end of the interposed spring 40 is inserted into the appropriate locking hole 37a. The auxiliary rear cover 31a is received by 41 and elastically holds the auxiliary rear cover 31a, and the posture of the auxiliary rear cover 31 can be changed by selecting the locking hole 37a into which the R pin 39 is inserted.

FIG. 3 shows another embodiment, in which the auxiliary rear cover pressing rod 37 of this example has its upper portion pivotally supported on the stay 45 screwed to the lower surface of the upper rear cover 13a so as to be rotatable back and forth, and the lower portion thereof. Penetrates the pipe held by stay 36 and lowers the R pin
39, and the upper end of the interposed spring 40 is locked by the R pin 41. In this example, the upper rear cover 13a has a long hole 38,
38 need not be provided.

In addition, a stay protruding from the upper surface of the lower rear cover 13b is provided.
42 is linked to a working depth detector consisting of a potentiometer via a rod 43 or a wire or those and a sensor arm, and the working depth detector is a lower rear cover.
The tilt angle of the lower rear cover 13b is detected whether the 13b is raised as shown in FIG. 1 or is set by lowering it, and based on this detection result, the hydraulic cylinder of the lift arm 9 is passed through a solenoid valve. It operates to raise and lower the tiller.

Thus, when performing standard or deep plowing, the upper rear cover 13
When a and the lower rear cover 13b are set in the state shown in FIG. 1 and cultivated, most of the soil cultivated by the plowing claws 6 ... Is received by the auxiliary rear cover 31 and leveled by its lower edge. The lower rear cover (13b) is pressed against the leveled soil surface of the auxiliary rear cover 31 and tilts up and down according to the working depth while further leveling, thereby detecting the working depth as described above, and the tilling claws 6 ... Part of the soil scraped up by is guided by the front surface of the auxiliary rear cover 31 and the lower surface of the rotary cover 17 to move forward and accumulate.

Normally, when plowing the field, when the plowing of one stroke is started and finished, the plowing claws 6 ... Although there is a marked unevenness, the soil that has moved to the front falls into the concave portion of the headland and fills the concave portion, so that the soil can be easily leveled.

When performing standard tillage or shallow tillage, even if the upper rear cover 13a and the lower rear cover 13b are lowered and set, most of the tilled soil is received by the auxiliary rear cover 31 and leveled once, and then the lower rear cover 13b is Leveling and sensing of working depth are performed, and some soil moves forward.

While the plowing depth is being sensed, the auxiliary rear cover 31 does not collide with the lower rear cover 13b even if the tilling claws 6 ... Throw fine soil or a lump of soil, so that the lower rear cover 13b does not collide. Since the auxiliary rear cover 31 follows the leveled soil surface and slides while sensing the working depth,
The detection value of the tilling depth detector is stable, the tiller is not frequently moved up and down, and the soil surface can be leveled more smoothly.

Further, the scraping work is performed in a state where the shaft 35 is pulled out, the auxiliary rear cover 31 is removed, and the upper rear cover 13a and the lower rear cover 13b are lowered.

(G) Effect of the Invention In the present invention, a rotary cover 17 is provided on the upper part of the rotary tiller, and a rear cover is provided on the rear part of the rotary cover 17.
In a cultivator in which 13 is swingably pivoted, the rear cover 13 is composed of an upper rear cover 13a and a lower rear cover 13b that can be mutually bent, and the upper rear cover 13a is connected to a rotary cover 17 so that the vertical angle can be adjusted. The lower rear cover 13b is designed to maintain a certain posture after adjusting the angle.
Is pivotally connected to the upper rear cover 13a so as to be swingable back and forth and interlocked with the tillage depth detector, and an auxiliary rear cover 31 is rotatably pivotally attached to the lower surface of the upper rear cover 13a.
Since 31 is elastically held by the pressure rod 37 in a state in which it is separated from the rear cover 13 to the rear portion from the pivot portion of the upper rear cover 13a, the rear cover 13 can be greatly raised and lowered while folding the rear cover 13 in two steps to perform deep plowing and shallow plowing. In addition, while the upper rear cover 13a is kept in a constant inclined posture suitable for the working depth, the lower rear cover 13b can accurately sense the working depth while the auxiliary rear cover 31 is moved up and down.

Moreover, the auxiliary rear cover 31 is in a state in which the fine soil and the lump of soil that the plowing claws scrape out and throws are supported by the upper rear cover 13a which maintains a certain posture and the lower rear cover 13b.
While it prevents the collision with the lower rear cover 13b by receiving it at a position separated from the lower rear cover 13b, the tilled soil is leveled independently, and the lower rear cover 13b is pressed against the cultivated soil surface separately from the auxiliary rear cover 31. While proceeding, the tilling depth can be reliably detected with high sensing accuracy without being affected by the impact of the soil mass thrown by the tilling claw, the swing of the auxiliary rear cover 31, and the like.

Further, since the auxiliary rear cover 31 and the lower rear cover 13b independently perform the leveling action, the leveling accuracy can be improved.

Further, when the soil is often carried around to the front, it becomes a factor that hinders the evenness. In such a case, the auxiliary rear cover 31 can be easily removed.

[Brief description of drawings]

1 is a side view of a cultivator, FIG. 2 is an exploded perspective view of an auxiliary rear cover and an upper rear cover, and FIG. 3 is a side view showing another embodiment. Figure,
4 and 5 are side views of the rear cover adjusting device, FIG.
FIG. 7 is a sectional view of the cam mechanism, and FIG. 7 is a perspective view of the cultivator. 6 ... tilling claw, 13 ... rear cover, 13a ... upper rear cover, 13b ... lower rear cover, 17 ... rotary cover, 21 ... posture maintaining member, 31 ... auxiliary rear cover, 35 ...
…axis

Claims (2)

[Scope of utility model registration request] 1. In a cultivator in which a rotary cover 17 is provided on an upper part of a rotary cultivating device, and a rear cover 13 is pivotably attached to a rear portion of the rotary cover 17, an upper rear cover 13a capable of mutually bending the rear cover 13. And the lower rear cover 13b. The upper rear cover 13a is connected to the rotary cover 17 so that the vertical angle can be adjusted so as to maintain a fixed posture after the angle adjustment.
b is connected to the upper rear cover 13a so as to be capable of swinging back and forth and interlockingly linked with the tilling depth detector, and an auxiliary rear cover 31 is rotatably pivotally attached to the lower surface of the upper rear cover 13a. The rotary cultivator is characterized in that the upper rear cover 13a is elastically held to the rear of the upper rear cover 13a in a state of being separated from the rear cover 13. 2. The rotary cultivator according to claim 1, wherein the auxiliary rear cover is detachably attached to the upper rear cover in a pivotable manner.