JP2519466B2 - Automatic tiller depth adjusting device for rotors in tillage machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention adjusts the resistance applied to a resistance rod by moving an engine back and forth, whereby the tilling depth of a rotor can be automatically adjusted. The present invention relates to an automatic tilling depth adjusting device for a rotor in a machine.

[Conventional technology]

For example, in a tilling machine such as a tiller, a rotor that combines both traveling and tilling, an engine for driving and rotating the rotor, and a resistance rod for adjusting the working depth are attached to a frame, and the traveling speed is adjusted to adjust the rotor speed. It is a working machine that cultivates by.

As shown in FIG. 2, a resistance rod (skid) 38 is attached to a frame 36 on which the rotor 32 and the engine 34 are attached, and by adjusting the vertical force applied to the handle 40, the working depth of the rotor 32 is adjusted. Is being adjusted.

That is, when the handle 40 is pushed down, the resistance rod 38 digs into the soil, the drag resistance and slip of the rotor 32 increase, and the plowing action increases, thereby deepening the plowing depth. On the contrary, when the handle 40 is lifted, the plowing action of the rotor 32 is reduced, the traveling action is increased, and the plowing depth becomes shallow.

[Problems to be solved by the invention]

As described above, in the conventional tillage machine, since the working depth of the rotor is adjusted by adjusting the vertical force applied to the handle by the operator, the working requires skill and labor, and the working depth is difficult to be constant. There was a problem.

In view of such problems, the present invention attaches the engine to the frame so as to move back and forth, and moves the engine back and forth based on the result of comparison between the working depth detected by the working depth detection sensor and the set working depth. Also, the tail wheel is moved up and down to automatically adjust the working depth of the rotor to keep it constant.

[Means for solving problems]

The present invention relates to a cultivating machine in which a rotor having both traveling and tillage, an engine for driving and rotating the rotor, and a resistance rod for adjusting the tillage depth are mounted on a frame, so that the engine can be moved back and forth on the frame. Along with the installation, the tail wheel is attached so that it can move up and down, and a tilling depth detection sensor for detecting the tilling depth of the rotor during tilling and a drive device for causing the engine to move back and forth and the tail wheel to move up and down. The rotor is provided by driving the drive unit to drive the engine back and forth and the tail wheel up and down based on the result of comparison between the working depth detected by the working depth detection sensor and the set working depth. It is characterized by automatically adjusting the working depth.

〔Example〕

FIG. 1 shows a tilling machine including an automatic tilling depth adjusting device for a rotor according to the present invention.

A rotor 4 is attached to a front portion of the frame 2, and a pair of tail wheels 6 is attached to a rear portion of the frame 2 at a predetermined interval along a direction perpendicular to a traveling direction Q of the tilling machine. A resistance rod 8 is attached to the frame 2 between the rotor 4 and the tail wheel 6. Example rotor 4
Is a single row, but may be a double row.

A first hydraulic cylinder S ₁ is attached to the frame 2, and an engine E for driving and rotating the rotor 4 is attached to the frame 2 so as to be movable in the front-rear direction (the same as the traveling direction Q of the tilling machine). , The rod R _{1 of} the first hydraulic cylinder S ₁ and the engine E are connected to each other, and the engine E moves back and forth when the rod R ₁ of the _first hydraulic cylinder S ₁ moves in and out.

The pair of tail wheels 6 are attached to the frame 2 via the second and third hydraulic cylinders S ₂ and S ₃ , respectively. That is, each rod R ₂ of the second and third hydraulic cylinders S _2, S _3, R ₃ and Kakuowa 6 and are connected, each rod R _2,
The tail wheel 6 is configured to move up and down as R ₃ moves in and out.

In addition, the frame 2 has a tilling depth detection sensor 10 for detecting the tilling depth H of the rotor 4 during tilling, and a pair of left and right tail wheels 6.
And a horizontal sensor 12 for detecting the inclination angle of.

The hydraulic pump P of the hydraulic device A for operating the first, second and third hydraulic cylinders S ₁ , S ₂ , S ₃ is driven by the engine E for driving and rotating the rotor 4.

For the first, second and third hydraulic cylinders S ₁ , S ₂ , S ₃ ,
Three-position switching type directional control solenoid valves V ₁ , V ₂ and V ₃ are connected, and the hydraulic cylinders S ₁ , S ₂ and S ₃ are opened and closed by opening and closing the directional control solenoid valves V ₁ , V ₂ and V _3. Operate.

The opening / closing of each directional control solenoid valve V ₁ , V ₂ , V ₃ is controlled by the logic circuit B. This logic circuit B has a set working depth.
H ₀ is input in advance, and the working depth H of the rotor 4 detected by the working depth detection sensor 10 during tilling,
And the inclination angles of the pair of left and right tail wheels 6 detected by the horizontal sensor 12 are input.

Then, the plowing depth H of the rotor 4 and the set plowing depth H ₀ detected by the plowing depth detecting sensor 10 during the plowing are set to the logic circuit B.
Based on the result of comparison by each directional control solenoid valve V ₁ ,
V ₂ and V ₃ are activated.

That is, when the plowing depth H during tilling is shallower than the set plowing depth H ₀ , the hydraulic cylinders S ₁ , S ₂ , S ₃ are operated by the directional control solenoid valves V ₁ , V ₂ , V ₃ respectively. As the engine E moves backward, the tail wheel 6 rises with respect to the frame 2, whereby the resistance applied to the resistance rod 8 increases and the working depth H of the rotor 4 becomes deeper. When the tilling depth H of the rotor 4 reaches the set tilling depth H ₀ , the directional control solenoid valves V ₁ , V ₂ and V ₃ are in a neutral state and the operation of each hydraulic cylinder S ₁ , S ₂ and S ₃ is stopped. .

When the plowing depth H during plowing is deeper than the set plowing depth H ₀ , the hydraulic cylinders S ₁ , S ₂ , S ₃ operate in the opposite direction to the above, the engine E moves forward, and the tail wheel 6 Lowers with respect to the frame 2, whereby the resistance applied to the resistance rod 8 is reduced and the working depth H of the rotor 4 becomes shallow. By this action, the working depth H of the rotor 4 is automatically adjusted and kept substantially constant.

If only the tail wheel 6 moves up and down, the resistance rod 8 will be moved depending on the hardness of the tiller.
Since the resistance applied to the wheel is not constant and stable tilling depth cannot be obtained, the resistance applied to the resistance rod 8 is increased or decreased by the forward / backward movement of the heavy engine E simultaneously with the vertical movement of the tail wheel 6 to stabilize the tilling depth. I am trying to In addition, if the platter is hard and the engine E is moved rearward and the prescribed depth cannot be obtained due to the insufficient weight of the engine E, a predetermined weight (not shown) is integrated with the engine E. Alternatively, the engine E and the weight may be integrated with each other to be moved back and forth to increase the resistance applied to the resistance rod 8.

Further, when it is detected by the horizontal sensor 12 that the pair of left and right tail wheels 6 is inclined, the direction control solenoid valves V ₂ and V ₃ are operated by the directional control solenoid valves V ₂ and V ₃ based on the command of the logic circuit B to determine whether the hydraulic cylinders S ₂ and S ₃ One of them operates so that the pair of left and right tail wheels 6 is kept horizontal.

Reference numeral 14 in the figure denotes a handle attached to the frame 2.

The tilling machine equipped with the rotor automatic tilling depth adjusting device according to the present invention may be either for human power or for unmanned operation.

〔The invention's effect〕

According to the present invention, based on the result of comparison between the plowing depth detected by the plowing depth detection sensor and the set plowing depth, the drive device is operated to move the tail wheel up and down and simultaneously move the heavy engine back and forth. By doing so, the resistance applied to the resistance rod is adjusted, so that the working depth of the rotor can be automatically adjusted.

For this reason, in the case of a cultivator for human power, the cultivating depth of the rotor, which had been adjusted by adjusting the force applied to the handle, can be automatically adjusted, so cultivating work by the cultivator can be performed without requiring skill and labor. be able to. Further, since the working depth of the rotor can be automatically adjusted, the effect of stabilizing the working depth becomes remarkable when the automatic working depth adjusting device for the rotor according to the present invention is mounted on an unmanned tilling machine.

Furthermore, if it is not possible to stabilize the working depth of the rotor due to insufficient weight of the engine simply by moving the engine rearward to increase the resistance applied to the resistance rod, attach a weight to the engine integrally and By arranging so as to integrally move back and forth, a predetermined tilling depth can be secured even when the tiller is hard.

[Brief description of drawings]

FIG. 1 is a view for explaining an automatic plowing depth adjusting device for a rotor according to the present invention, and FIG. 2 is a front view of a conventional tilling machine. The description of the reference numerals of the main parts is as follows. A: Hydraulic device (driving device) B: Logic circuit, E: Engine R ₁ , R ₂ , R ₃ : Hydraulic cylinder rod S ₁ , S ₂ , S ₃ : Hydraulic cylinder V ₁ , V ₂ , V ₃ : Direction Control solenoid valve 2: Frame, 4: Rotor 6: Tail wheel, 8: Resistance rod 10: Plow depth sensor, 12: Horizontal sensor 14: Handle

Claims (3)

(57) [Claims] Claim: What is claimed is: 1. In a cultivating machine having a frame equipped with a rotor for both traveling and tillage, an engine for driving and rotating the rotor, and a resistance rod for adjusting the tillage depth, the engine can be moved back and forth on the frame. And a tail wheel movably mounted vertically, and a tillage depth detection sensor for detecting the tilling depth of the rotor during tilling, and a drive device for causing the engine to move back and forth and the tail wheel vertically. By including the plowing depth detected by the plowing depth detection sensor, and by driving the drive unit based on the result of comparison of the set plowing depth, to cause the engine to move forward and backward, and the tail wheel to move up and down. An automatic plowing depth adjusting device for a rotor in a tilling machine, characterized by automatically adjusting the plowing depth of a rotor. 2. An automatic tillage of a rotor in a tilling machine according to claim 1, wherein a weight is integrally attached to the engine, and the engine and the weight are integrally moved back and forth. Depth adjustment device. 3. An automatic tilling depth adjusting device for a rotor in a tilling machine according to claim 1, wherein the drive device is a hydraulic device.