JPH03201901A - Cover for rotary-type agricultural machine - Google Patents

Abstract

PURPOSE:To make attached mud readily removable from cover, promoting water film-formation on the surface of the cover, and suppressing the attaching of mud by keeping a cover for a rotary-type agricultural machine in negative electric potential. CONSTITUTION:An electrode C is buried in a cover A of a rotary-type agricultural machine through an insulator B and an electric source D is provided between the cover and the electrode, then the cover is kept in negative electric potential. An application of from about several volts to ten and several volts electric voltage from the electric source D is sufficient to form an atmosphere having high cation concentration in the vicinity of the cover A.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a cover for preventing mud from adhering to agricultural machines such as rotary tillers and plowers.

[Conventional technology]

2. Description of the Related Art A rotary type agricultural machine that performs agricultural work such as tilling and puddling is known, for example, in which a large number of tilling claws are attached to the periphery of a tilling shaft and the tilling shaft is rotated by power transmitted from an engine.

For example, the present applicant also developed an up-cut type tilling device having the structure shown in FIG. 3 as a type of rotary type, and filed an application for this as Utility Model Application No. 137316/1982.

This tillage bag fil allows the top mast 2 and the lower link connecting portion 3 attached to the three-point link hitch mechanism to protrude forward from the work equipment main body 4, and also allows the input shaft 5 to protrude forward from the miss B case of the work equipment main body 4. protrudes, and rotational power is transmitted to this human power shaft 5 from the PTO shaft of the tractor.

A tilling shaft 6 is mounted horizontally on the working machine body 4, and a tilling rotor is attached to the periphery of the tilling shaft 6. 8, and the power received by the input shaft 5 is transmitted through a transmission type to rotate in the direction of the arrow.

A shield cover 9 extends from the top of the tilling rotor 8 to the front.
A front reinforcing cover 10 is provided outside the lower end of the shield cover 9. Further, a bulging portion 11 that bulges upward is formed at a rear end portion of the shield cover 9, and a rubber cover support member 12 made of a comb-like elastic material is supported here. A rubber cover 13 is supported on 12. Further, in the apron attachment, the apron 15 is rotatably supported via the seat 14 so that the rubber cover support member 12 and the lower part of the rubber cover 13 overlap.

Further, in a space between the rubber cover support member 12 and the tilling rotor 8 in the bulge 11, a support shaft 1f3a at the front end of the rake body 16 is provided so as to be rotatable in the vertical direction. The rotation angle of the rake pair 16 is adjusted by adjusting the rotation angle of the rake pair 16 from the support shaft 16a by a rake adjustment mechanism 18 provided on a frame pipe I7 extending laterally from the work machine main body 4.
It can be adjusted steplessly around the center.

The rake adjustment mechanism 18 connects the support member 12 and the rubber cover 1 to the other end of the rotating arm 16b, one end of which is fixed to the support shaft lea.
3, the rear end of a screw moving part 19 is pivotally supported at the projecting end thereof, and a rotating handle 2o is attached to the tip of the screw moving part 19. The rotary handle 20 can be operated by a worker riding a tractor facing backwards while the rotary tilling device 1 is lifted up by the tractor.

The attachment M14 of the apron 15 is selectively attached to the holes 22 provided on the left and right sides of the tilling rotor 8, and the attachments provided in three upper and lower stages at the rear end of the cover 2I. Adjustment of the pivot height of the apron 15, that is, the attachment, the attachment of the seat 14 to the hole 22, and the adjustment of the position are performed together with the plowing depth adjustment and the angle adjustment of the rake pair 16 by the rake adjustment mechanism 18.

[Problem to be solved by the invention]

In this type of rotary type agricultural machinery, the shield cover 12. Apron15. There is significant mud and dirt adhering to the side cover 21, etc. For example, the attached mud and soil accumulates in the space between the shield cover 12 and the tips of the tilling claws 7, and obstructs the rotation of the tilling shaft 6. Further, mud and soil adhering to the apron 15 inhibit the original leveling action of the apron 15, reducing the quality of the plowing work and plowing work.

Therefore, the shield cover 12. Mud and ± adhering to the apron 15° side cover 21, etc. (in this specification, these are referred to as covers, including the claims) (in this specification, these are also collectively referred to as mud) ) will be required to be removed. However, the mud that adheres to and accumulates on the cover has a strong adhesion force to the cover.
A great deal of labor and time is consumed in mud removal work.

In order to suppress or prevent the adhesion of mud, some methods include applying vibration to the cover to remove the adhering mud, or changing the surface of the iron plate that is the material of the cover to a material that is less likely to attract or accumulate mud. Proposed. However, even with these methods, sufficient effects in preventing mud adhesion have not been achieved.

Therefore, the present invention maintains the cover at a negative potential to promote the formation of a water film on the surface of the cover, suppressing the adhesion of mud, and making it easier for the adhered mud to separate from the cover. The purpose is to provide a cover for rotary type agricultural machinery.

[Means to solve the problem]

In order to achieve the object, the present invention provides a cover disposed on a part of the circumferentially outer side of a tilling rotor in which a large number of tilling claws are attached to the periphery of a tilling shaft installed in the horizontal direction. The device is characterized in that an electrode is embedded in the device via an insulator, and means is provided for applying a voltage between the cover and the electrode so that the cover is maintained at a negative potential.

[For production]

In the rotary agricultural machine to which the present invention is applied, the cover is maintained at a negative potential. It is presumed that the reason why mud adhesion is suppressed by this potential is as follows. That is, cations such as potassium ions and sodium ions contained in the soil migrate toward the cover, and an atmosphere with a high concentration of these cations is formed around the cover. When the concentration of these cations exceeds a predetermined value, they absorb moisture from the soil and change into hydroxides. This hydroxide further absorbs water contained in the soil and forms a water film on the cover surface.

This water film washes away mud that is about to adhere to the cover, and also reduces the adhesion of mud that has already adhered. As a result, the adhesion and accumulation of mud on the cover is eliminated.

〔Example〕

Hereinafter, the present invention will be specifically described by way of examples with reference to the drawings.

In the rotary type agricultural machine cover of this embodiment, as shown in FIG. 1, an electrode C is attached to a cover body A with an insulator B interposed therebetween. Then, a voltage of several volts or so is applied from a power source between the cover body A and the electrode C to maintain the cover body A at a negative potential.

The electrodes C are arranged at intervals where voltage application is effective (for example, 70 m+
n), a plurality of them can be attached to the cover body A.

Further, as the insulator B, it is preferable to use a material that is resistant to the adhesion of mud, such as a synthetic resin with a smooth surface.

In this way, when a voltage is applied between cover A and electrode C, potassium ions, sodium ions, calcium ions, etc. contained in the soil near cover A migrate as shown in Figure 2. , an atmosphere with high cation concentration is formed. This atmosphere with a high concentration of cations has strong water absorption, absorbs water in the soil, and forms a water film F on the surface of the cover A.

Due to this water film formation, the soil clod E adhering to the cover A
The viscosity of the material decreases, and the adhesion force to the cover A decreases.

Then, the earth clod E whose adhesion force has decreased is separated from the surface of the cover A together with the water film E formed on the surface of the cover A.

For example, on the surface of a steel plate with a width of 20 cm and a length of 1 m,
A cover A was prepared in which a plurality of electrodes C were implanted at a mutual interval of 70 mm. This cover A has an average thickness of 3
After attaching cw+ soil clod E 1, cover A and electrode C
A voltage of 12 volts was applied between the two. In this state, cover A was dragged while contacting the soil surface.

When the state of the soil clod E adhering to the cover A was measured after one hour, it was found that the mud had an average thickness of 1.0 cm, which was smaller than the mud adhesion state before the test.

On the other hand, when no voltage was applied, the mud adhesion thickness reached 10 cm in some cases after testing under similar conditions.

Therefore, when cover A with electrode C attached was attached to an actual power tiller and used for actual agricultural work, it was found that
It was necessary to remove the clods of soil E that had adhered to the cover A every hour, but even after using it for one day, the average thickness was 1.
Only soil clods E of 2 cm or less were attached. Also,
Since the adhesion of the clod E to the cover A was small, the clod E could also be removed from the cover A with a simple operation.

(Effects of the Invention) As explained above, in the present invention, by maintaining the cover at a negative potential, the adhesion of mud, which conventionally adheres to the cover and obstructs the movement of the tiller shaft, etc., is suppressed. Therefore, it becomes possible to use a machine with good workability.

In addition, since the adhesion force of the adhered mud to the cover is small, it is possible to remove the mud from the cover with careful work.
Agricultural machinery can always be maintained in good condition.

[Brief explanation of drawings]

Fig. 1 shows the main parts of the cover in the embodiment of the present invention, 2rgJ is a diagram for explaining the situation in which mud adhesion is suppressed by using the cover, and Fig. 3 is a diagram for explaining the situation in which the cover is used to suppress the adhesion of mud. Show the device.

Claims (1)

[Claims] In a cover disposed on a part of the circumferentially outer side of a tilling rotor having a plurality of tilling claws attached to the periphery of a tilling shaft installed in the horizontal direction, an electrode is embedded in the cover through an insulator, and an electrode is embedded in the cover through an insulator. A cover for agricultural machinery, comprising means for applying a voltage between the cover and the electrode so that the cover is maintained at a negative potential.