JP2023111503A - Tending machine - Google Patents

Abstract

To provide a walk-behind tiller capable of automatically adjusting a tillage depth in a simple configuration.SOLUTION: A tiller comprising a control device P and a tillage device 3 in a tiller body 1, is so configured that the tillage device 3 includes: a rotary cover 50 for covering the tillage device 3, where a rear part of the rotary cover 50 includes a rear cover 53 turning back and forth and where the rear cover 53 includes an angle sensor K for detecting the turning of the rear cover 53; a vertically-movable resistance bar 51; and an actuator A for vertically moving the resistance bar 51. The resistance bar 51 includes an upper sensor S1 for detecting a position of the resistance bar 51, on an upper part of the resistance bar 51, and a lower sensor S2 for detecting the position of the resistance bar 51, on the lower part of the resistance bar 51. The angle sensor K inputs a detection signal in the control device P, and the control device P outputs the detection signal to the actuator A so as to move the resistance bar 51 up and down, thereby controlling the tillage depth.SELECTED DRAWING: Figure 9

Description

The present invention relates to a walk-behind cultivator.

2. Description of the Related Art Conventionally, a cultivator that plows a field and performs ridge-building work and the like is known, as in the technique disclosed in Patent Document 1.

A conventional walk-behind cultivator is provided with a tail wheel that enables the cultivator to travel without contacting the tines with the ground when traveling.

JP-A-2003-310001

However, according to the configuration of the conventional walk-behind cultivator, the cultivator is moved to adjust the tillage depth, and the configuration is complicated.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a walk-behind cultivator capable of automatically adjusting the tillage depth with a simple structure for moving up and down a resistance bar.

In order to solve the above problems, the present invention has taken the following technical measures.

The invention according to claim 1 is a cultivator comprising a machine body (1), a control device (P), and a tillage device (3), wherein the tillage device (3) is equipped with a sensor (S) for detecting a tillage depth. ) and an actuator (A) for vertically moving the resistance rod (51), and the sensor (S) inputs a detection signal to the control device (P). , the control device (P) outputs to the actuator (A) to move the resistance bar (51) up and down to control the tillage depth.

The invention according to claim 2 comprises a rotary cover (50) covering the tilling device (3), and the rotary cover (50) is provided with the sensor (S). It is a type cultivator.

In the invention according to claim 3, a rear cover (53) rotating back and forth is provided at the rear portion of the rotary cover (50), and an angle sensor (K) is provided for detecting the rotation of the rear cover (53). A walk-behind cultivator according to claim 2.

In the invention according to claim 4, an upper sensor (S1) for detecting the position of the resistance bar (51) is provided at the upper part of the resistance bar (51), and the resistance bar (51) is provided at the lower part of the resistance bar (51). ), and when either the upper sensor (S1) or the lower sensor (S2) is in a detection state, the control device (P) controls the actuator (A) 4. The walk-behind cultivator according to any one of claims 1 to 3, characterized in that control for stopping is possible.

According to the first aspect of the present invention, the sensor (S) detects the plowing depth, and based on the detection result, the control device (P) operates the actuator (A) to move the resistance bar (51) up and down. Since the tillage depth is controlled by moving, the operator does not have to manually adjust the tillage depth, and comfortable farm work becomes possible.

According to the second aspect of the present invention, the tillage depth can be automatically adjusted with a simple structure by providing the sensor (S) in the rotary cover (50).

According to the third aspect of the present invention, the tillage depth can be detected and the tillage depth can be automatically adjusted with a simple configuration in which the angle sensor (K) detects the forward and backward rotation of the rear cover (53).

According to the fourth aspect of the present invention, the resistance bar (51) is provided with an upper sensor (S1) and a lower sensor (S2), and when either the upper sensor (S1) or the lower sensor (S2) reacts can detect that the resistance bar (51) reaches the upper limit position or lower limit position, and automatically adjust the resistance bar (51) within the interval where the upper sensor (S1) and lower sensor (S2) do not react Thus, the resistance bar (51) can be prevented from coming off, and the load on the actuator (A) can be reduced.

1 is a side view of a walk-behind cultivator of the present invention; 1 is a side view of a walk-behind cultivator of the present invention; 1 is a perspective view of a resistance bar of a walk-behind cultivator of the present invention; FIG. 1 is a perspective view of a resistance bar of a walk-behind cultivator of the present invention; FIG. 1 is a perspective view of a resistance bar of a walk-behind cultivator of the present invention; FIG. 1 is a perspective view of a resistance bar of a walk-behind cultivator of the present invention; FIG. 1 is a perspective view of a resistance bar of a walk-behind cultivator of the present invention; FIG. 1 is a perspective view of a resistance bar of a walk-behind cultivator of the present invention; FIG. 1 is a perspective view of a main part of a cultivator of a walk-behind cultivator according to the present invention; FIG. 1 is a perspective view of a main part of a cultivator of a walk-behind cultivator according to the present invention; FIG. 1 is a perspective view of a walk-behind cultivator of the present invention; FIG. The control block diagram of this invention. The flowchart figure of this invention. The flowchart figure of this invention.

Hereinafter, the configuration and operation of the basic configuration of the machine body 1 of the walking type axle tillage machine, which is one embodiment of the present invention, will be specifically described.

In the description of the embodiments, the left and right directions are referred to as left and right, respectively, the forward direction is referred to as forward, and the backward direction is referred to as rear, but this does not limit the configuration of the present invention.

Description will be made based on FIG.

A body 1 of a walk-behind cultivator has a front bracket 10 on the front side, an engine E and the like on the front bracket 10, and a transmission case D for transmitting the drive of the engine E to each part in the middle part of the body 1. , left and right driving wheels 2L and 2R are provided on the front of the transmission case D, and a tillage device 3 is provided on the rear side. A fuel tank for supplying fuel to the engine E is provided above the engine E, and a hood 11 is provided to cover the engine E and the like from above. is provided with a fuel filler port 13 for lubricating.

The drive of the engine E is transmitted to the input shaft 4 of the transmission case D via the belt, and the power is transmitted from the input shaft 4 to the wheel shaft 20 that drives the traveling wheels 2 and the tillage shaft 30 that drives the tillage device 3 .

A handle root portion 61 of the operation handle 6 is provided on the upper portion of the transmission case D. As shown in FIG.

The operation handle 6 for operating the machine body 1 is composed of a handle base portion 61, a handle body portion 62, a handle grip portion 63, etc., and an operating device for operating each part is provided near the handle grip portion 63. . The operation device includes a main clutch lever 64, a rotary clutch lever 65, a side clutch 66, an emergency stop lever 67, and the like. It is supported by the portion 62 and the handle root portion 61 .

The machine body 1 is provided with a control device P that receives signals from the operating handle 6 and sensors S provided at predetermined positions on the operating handle 6 and the machine body 1 and controls each section.

The control device P detects the reaction from the sensor S and controls the drive shafts such as the wheel shaft 20 and the tillage shaft 30 that drive the work section.

As shown in FIG. 1, the tillage device 3 includes a plurality of tillage tines 31 on a tillage shaft 30 that rotates about a left-right horizontal axis, and is provided with a rotary cover 50 so as to cover above the rotation trajectory of the tillage tines 31 .

A resistance bar 51 , a tail wheel 52 , and a rear cover 53 are provided at the rear portion of the rotary cover 50 .

The rear cover 53, which rotates up and down on a lateral axis 59, rotates upward when the tilling depth of the tilling device 3 becomes shallow, and rotates downward when the tilling depth becomes deep.

The state shown in FIG. 1 is a state in which no plowing work is being performed, and the tail wheel 52 is normally not used during plowing work, but may be used depending on the situation.

The resistance rod 51 can be vertically adjusted by inserting the resistance rod 51 into the resistance rod holder 54 as shown in FIG.

The adjustment handle 55 is provided with an actuator A, and the adjustment handle 55 is rotated by the operation of the actuator A (the electrical components related to the actuator A are not shown).

The resistance bar 51 and the resistance bar holder 54 shown in FIG.

An upper sensor S1 is provided on the upper side of the resistance bar 51, and a lower sensor S2 is provided on the lower side thereof.

Upper sensor S1 and lower sensor S2 react when the upper and lower ends of resistance bar holder 54 are raised or lowered too much.

The actuator A can prevent damage to the resistance rod 51, the resistance rod holder 54, and the actuator A by moving the resistance rod 51 up and down within a section in which the upper sensor S1 or the lower sensor S2 does not react. If the actuator A is operated endlessly upward, the lower end of the resistance rod 51 may be caught in the resistance rod holder 54, and the resistance rod 51 and the resistance rod holder 54 may be deformed or damaged, or the actuator A may be damaged due to overload. However, it can be prevented by the above configuration. In addition, if the actuator is operated downward endlessly, the resistance rod 51 may come off or deform, or the actuator A may be damaged due to an overload.

Another configuration of the cultivator shown in FIG. 1 will be described below.

Holes are drilled in the left and right walls of the rotary cover 50 and the sensor is bolted (not shown) so that the sensor reacts when the resistance bar 51 moves up and down beyond a certain position.

In addition, in the configuration in which the sensor is bolted to the mounting hole, the mounting hole may be an elongated hole so that the bolt fastening position can be arbitrarily adjusted.

Although the actuator A automatically adjusts the resistance bar 51 up and down according to the reaction of the sensor, this control may be turned on and off.

The cultivator shown in FIG. 2 will be described below.

The basic configuration of the cultivator of FIG. 2 is generally the same as that of the cultivator of FIG. 1, but the configuration of the resistance bar 51 is different.

There is one in which the resistance rod 51 and the resistance rod holder 54 are provided with adjustment holes 58, and the resistance rod 51 is vertically adjusted by fixing a pin 57 at an arbitrary position.

In the structure for adjusting the resistance bar 51 up and down, it is not necessary to use the handle operation type shown in FIG. 1 or the pin fastening type shown in FIG.

The configurations of FIGS. 9 and 10 will be described.

A rear cover 53 is vertically rotatably suspended from the rear end of the rotary cover 50 and supported around a left-right horizontal axis.

The rear cover 53 rotates in the vertical direction by rotating the shaft 59 in the horizontal direction.

The rotary cover 50 is provided with a sensor for detecting rotation of the rear cover 53 .

In FIG. 9, an angle sensor K is provided. Control by the configuration of FIG. 9 is as shown in the flow chart of FIG.

The configuration for detecting the tillage depth by turning the rear cover 53 may be a configuration as shown in FIG. 10 .

A sensor support portion 34 is provided on the outer left side surface of the rotary cover 50 .

The sensor support portion 34 has a U-shape, and the sensor is provided inside the U-shape.

The sensors include an upper inner sensor 32 on the inner upper side 34a of the sensor support and a lower inner sensor 33 on the inner lower side 34b of the sensor support. A butterfly plate 35 is provided on the left side of the rear cover 53 . The flap 35 can be opened and closed about a center shaft, and the left side of the flap 35 can be folded inward from the left end surface of the rear cover 53 . Before starting the tillage work, the butterfly plate 35 is folded and opened between the upper inner part 34a of the sensor support part and the lower inner part 34b of the sensor support part. During tillage work, if the tillage depth becomes too shallow or too deep, the rear cover 53 rotates and the butterfly plate 35 also moves, causing the upper inner sensor 32 and the lower inner sensor 33 to react. As a result, the tillage depth is detected and the control device P outputs it to the actuator A, so that the height of the resistance bar 51 can be adjusted so that the tillage depth is appropriate.

Control by the configuration of FIG. 10 is as shown in the flow chart of FIG.

The operation handle 6 is provided with a monitor M for displaying the rotation speed of the engine E so that the tillage load can be visually observed from the engine rotation speed. Further, a setting device capable of presetting a target tillage load is provided, and control is performed so that the tillage device 3 is not driven beyond the set load value. This setting device is also desirably provided on the operating handle 6 so that the operator can easily operate it.

The actuator A for moving the resistance bar 51 up and down is set in advance so as to be driven by a specified amount. After the actuator A has been driven, the actuator A is stopped when it has moved to a predetermined amount.

With this configuration, it is possible to avoid the problem that the actuator A is driven too much and the resistance rod 51 moves too far either up or down and protrudes out of the holder 54 .

In the cultivator provided with the resistance bar 51 shown in FIG. 3, the resistance bar 51 may be configured as follows.

The front, rear, left, and right directions in the following description are based on the traveling direction of the aircraft.

As shown in FIG. 4, the plate-like member I welded to the lower end T2 of the resistance rod 51, that is, the shape of the outer end G side of the plate-like member I in contact with the field is forked. Due to this shape, the resistance rod 51 can be handled as a conventional resistance rod, but by pulling out the resistance rod 51 after work, etc., it can be used as a cleaning tool for removing mud from the plowing tines 31 and the like. The shape of the outer end G side of the plate-like member I may not be a fork shape, may be a configuration in which a plurality of grooves are provided on the plane portion as shown in FIG. 5, or may be a rake shape. Other shapes may be used.

The resistance bar 51 may be configured as follows. As shown in FIG. 6, the upper end portion T1 side of the resistance bar 51 may have a shape in which the left-right width becomes narrower from the middle of the bar-shaped portion T3 toward the upper end portion T1. The plate-like member I of the resistance bar 51 may be shaped like a chisel, and the outer end G side of the plate-like member I may have a shape in which the vertical thickness becomes thinner toward the outer end G from the joining portion with the bar-like member T3. This allows the resistance rod 51 to be handled in the conventional way, but by pulling out the resistance rod 51 after work or the like, it can also be used as a cleaning tool for removing mud from the tines.

As shown in FIG. 7, a shape in which the lateral width on the upper end T1 side is narrow and the vertical thickness on the outer end G side is thin may be used. As a result, the resistance bar 51 can be handled in the conventional way, but by pulling out the resistance bar 51 after work, it can be used as a cleaning tool for removing mud from the tillage tines.

As shown in FIG. 8, a shape having a narrow lateral width on the side of the upper end T1 and a groove on the side of the outer end G may be used. As a result, the resistance bar 51 can be handled in the conventional way, but by pulling out the resistance bar 51 after work, it can be used as a cleaning tool for removing mud from the tillage tines.

A configuration in which the chisel-like shape having a narrower lateral width on the upper end T1 side and a thinner thickness on the outer end G side as described above and a configuration in which the outer end G of the plate-like member I is provided with a groove or a notch are appropriately combined. can be

As a result, the resistance bar 51 can be handled in the conventional way, but by pulling out the resistance bar 51 after work, it can be used as a cleaning tool for removing mud from the tillage tines.

With the above configuration, the worker does not have to carry a separate cleaning tool, which improves the comfort of farm work.

The hood 11 may be configured as follows. A storage space is provided inside the hood 11 so that tools such as nets and ropes can be stored in the storage space.

The following configuration may be added to the operating handle 6. As shown in FIGS. 2 and 11, the handle body portion 62 of the operating handle 6 is provided with a hook. A perforated stay or pin may be provided instead of the hook 36 . By providing the hook 36 or the like, a net or a rope can be hung on the operation handle 6, improving the efficiency of agricultural work.

1 tiller 2 traveling wheel 3 tiller 4 input shaft 6 operating handle 10 front bracket 11 hood 12 fuel gauge 13 fuel filler port 20 wheel shaft 30 tillage shaft 31 tillage claw 32 upper inner sensor 33 lower inner sensor 34 sensor support member 35 butterfly Plate 36 Hook 50 Rotary cover 51 Resistance bar 52 Tail wheel 53 Rear cover 54 Resistance bar holder 55 Adjustment handle 57 Pin 58 Adjustment hole 59 Shaft 61 Handle base 62 Handle body 63 Handle grip 64 Main clutch lever 65 Rotary clutch lever 66 side clutch 67 emergency stop lever 68 cable D transmission case E engine G outer end I plate member K angle sensor S sensor S1 upper sensor S2 lower sensor T1 upper end T2 lower end T3 rod-shaped portion

Claims (4)

A cultivator comprising a machine body (1) having a control device (P) and a tillage device (3). A bar (51) is provided, and an actuator (A) for moving the resistance bar (51) up and down is provided, the sensor (S) inputs a detection signal to the control device (P), and the control device (P) A walk-behind cultivator characterized by controlling the tillage depth by raising and lowering the resistance bar (51) by outputting to the actuator (A). A walk-behind cultivator according to claim 1, characterized in that it comprises a rotary cover (50) covering said cultivating device (3), said rotary cover (50) being provided with said sensor (S). 3. The rotary cover (50) has a rear cover (53) that rotates back and forth, and an angle sensor (K) that detects the rotation of the rear cover (53). walk-behind cultivator. An upper sensor (S1) for detecting the position of the resistance bar (51) is provided above the resistance bar (51), and a lower sensor for detecting the position of the resistance bar (51) is provided below the resistance bar (51). (S2), and when either the upper sensor (S1) or the lower sensor (S2) is in a detection state, the control device (P) is capable of controlling the actuator (A) to stop. The walk-behind cultivator according to any one of claims 1 to 3, characterized by: