JP7632331B2 - Management machine - Google Patents

Description

The present invention relates to a walk-behind tiller.

As with the technology disclosed in Patent Document 1, tillers that till fields and perform tasks such as creating ridges are known.

Conventional walk-behind tillers are equipped with a tail wheel that allows them to travel without the tiller tines touching the ground when moving around.

JP 2003-310001 A

However, with the above-mentioned conventional walk-behind tiller configuration, the tilling device had to be moved to adjust the tilling depth, making the configuration complicated.

The present invention aims to provide a walk-behind tiller that can automatically adjust tilling depth with a simple structure that moves a resistance rod up and down.

This invention takes the following technical measures to solve the above problems:

The invention of claim 1 relates to a tiller having a body (1), a control device (P), and a tilling device (3), the tilling device (3) having an upper inner sensor (32) and a lower inner sensor (33) for detecting tilling depth, and a resistance rod (51) that can move up and down, and an actuator (A) for moving the resistance rod (51) up and down, the upper inner sensor (32) and the lower inner sensor (33) input detection signals to the control device (P), and the control device (P) outputs to the actuator (A) to move the resistance rod (51) up and down, thereby controlling the tilling depth ,
A U-shaped sensor support portion (34) is provided on a rotary cover (50) of the tilling device (3), the upper inner sensor (32) is provided on an inner upper side (34a) of the sensor support portion (34), and the lower inner sensor (33) is provided on an inner lower side (34b) of the sensor support portion (34),
This walk-behind tiller is characterized in that a rear cover (53) equipped with a hinge (35) is provided at the rear of the rotary cover (50), the rear cover (53) is configured to rotate according to the tilling depth, the hinge (35) is disposed between the upper side (34a) of the sensor support portion and the lower side (34b) of the sensor support portion, and the rotation of the rear cover (53) is detected by the upper inner sensor (32) and the lower inner sensor (33) reacting via the hinge (35) .

The invention of claim 2 is a walk-behind tiller as described in claim 1, characterized in that an upper sensor (S1) for detecting the position of the resistance rod (51) is provided at the upper part of the resistance rod (51), and a lower sensor (S2) for detecting the position of the resistance rod (51) is provided at the lower part of the resistance rod (51), 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 .

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According to the present invention described in claim 1, the tilling depth is detected by the upper inner sensor (32) and the lower inner sensor (33) , and based on the detection result, the control device (P) operates the actuator (A) to move the resistance rod (51) up and down to control the tilling depth, thereby eliminating the need for the worker to manually adjust the tilling depth, making agricultural work more comfortable.
The movement of the rear cover (53) that constitutes the tilling device (3) is detected by an upper inner sensor (32) and a lower inner sensor (33) via a hinge (35), and the upper inner sensor (32) and the lower inner sensor (33) are attached to the inner upper side (34a) and the inner lower side (34b) of the U-shaped sensor support portion (34), so that the tilling depth can be adjusted appropriately.

According to the present invention described in claim 2, in addition to the effects of claim 1, the resistance rod (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, it can be detected that the resistance rod (51) has reached the upper limit position or the lower limit position. By automatically adjusting the resistance rod (51) within the section where the upper sensor (S1) and the lower sensor (S2) do not react, it is possible to prevent the resistance rod (51) from falling off and reduce the load on the actuator (A).

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Side view of the walk-behind cultivator of the present invention Side view of the walk-behind cultivator of the present invention FIG. 2 is a perspective view of a resistance bar of the walk-behind tiller of the present invention. FIG. 2 is a perspective view of a resistance bar of the walk-behind tiller of the present invention. FIG. 2 is a perspective view of a resistance bar of the walk-behind tiller of the present invention. FIG. 2 is a perspective view of a resistance bar of the walk-behind tiller of the present invention. FIG. 2 is a perspective view of a resistance bar of the walk-behind tiller of the present invention. FIG. 2 is a perspective view of a resistance bar of the walk-behind tiller of the present invention. FIG. 2 is a perspective view of a main part of the tilling device of the walk-behind tiller of the present invention. FIG. 2 is a perspective view of a main part of the tilling device of the walk-behind tiller of the present invention. FIG. 1 is a perspective view of a walk-behind cultivator according to the present invention. FIG. 2 is a control block diagram of the present invention. FIG. FIG.

The following is a detailed explanation of the basic configuration and operation of the body 1 of a walk-behind axle tilling machine according to one embodiment of the present invention.

In the description of the embodiment, the left and right directions in the forward direction of the aircraft 1 are referred to as left and right, respectively, and 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.

The explanation will be based on Figure 1.

The body 1 of the walk-behind tiller has a front bracket 10 at the front, an engine E etc. mounted on the front bracket 10, a transmission case D in the middle of the body 1 that transmits the drive of the engine E to each part, running wheels 2L and 2R on the left and right in front of the transmission case D, and a tilling device 3 at the rear. A fuel tank that supplies fuel to the engine E is mounted above the engine E, and a hood 11 that covers the engine E etc. from above is mounted on the hood 11, and a fuel gauge 12 that checks the remaining fuel level and a fuel filler port 13 that fills the fuel tank with fuel are mounted on the hood 11.

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

The upper part of the transmission case D is provided with the handle base portion 61 of the operating handle 6.

The operating handle 6 used to operate the machine body 1 comprises 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 operating device includes a main clutch lever 64, a rotary clutch lever 65, a side clutch 66, an emergency stop lever 67, etc., and a cable 68 (partially omitted from the illustration) for transmitting these operations to the transmission case D is supported by the handle body portion 62 and the handle base portion 61.

The aircraft 1 is equipped with an operating handle 6 and a control device P that receives signals from a sensor S provided at a predetermined position on the operating handle 6 and the aircraft 1 and controls each part.

The control device P detects the response from the sensor S and controls the drive shafts such as the wheel axle 20 and tiller axle 30 that drive the working part.

As shown in FIG. 1, the tilling device 3 is configured with multiple tilling tines 31 on a tilling shaft 30 that rotates around a horizontal axis, and is provided with a rotary cover 50 that covers the upper part of the rotation trajectory of the tilling tines 31.

The rear part of the rotary cover 50 is also equipped with a resistance rod 51, a tail wheel 52, and a rear cover 53.

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

Note that the state shown in Figure 1 is when no tilling work is being performed, and the tail wheel 52 is not normally used during tilling work, but may be used depending on the situation.

The resistance rod 51 can be freely adjusted up and down by inserting the resistance rod 51 into the resistance rod holder 54 as shown in Figure 1 and using the adjustment handle 55.

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

The resistance rod 51 and resistance rod holder 54 in Figure 1 are screw-type, and the resistance rod 51 is adjusted by rotating the adjustment handle 55.

The upper side of the resistance rod 51 is equipped with an upper sensor S1, and the lower side is equipped with a lower sensor S2.

The upper sensor S1 and the lower sensor S2 react when they rise or fall too far, approaching the upper or lower ends of the resistance rod holder 54.

Actuator A can prevent damage to the resistance rod 51, resistance rod holder 54, and actuator A by moving the resistance rod 51 up and down within a section where the upper sensor S1 or lower sensor S2 do not react. If it were to operate endlessly in the upward direction, the lower end of the resistance rod 51 would get caught on the resistance rod holder 54, causing the resistance rod 51 or resistance rod holder 54 to deform or break, or actuator A to be damaged by overload, but this can be prevented by the above configuration. Also, if it were to operate endlessly in the downward direction, the resistance rod 51 could fall off or deform, or actuator A could be damaged by overload, but this can be prevented by the above configuration.

Below, we will explain another configuration of the tiller in Figure 1.

The sensor is bolted to holes drilled in the left and right walls of the rotary cover 50 (not shown), and the sensor reacts when the resistance rod 51 moves up or down beyond a certain position.

In addition, in a configuration in which the sensor is bolted to the mounting hole, the mounting hole may be an elongated hole, allowing the bolt fastening position to be adjusted as desired.

Actuator A automatically adjusts the resistance rod 51 up and down based on the sensor's response, but this control can also be switched on and off, in which case it is preferable to provide the control tool on the operating handle 6.

The cultivator in Figure 2 is explained below.

The basic configuration of the tiller in Figure 2 is generally similar to that of the tiller in Figure 1, but the configuration of the resistance rod 51 is different.

Some devices have adjustment holes 58 in the resistance rod 51 and resistance rod holder 54, and allow the resistance rod 51 to be adjusted up or down by fastening a pin 57 at any desired position.

The configuration for adjusting the resistance rod 51 up and down does not have to be the handle-operated type shown in Figure 1 or the pin-fixed type shown in Figure 2.

The configurations shown in Figures 9 and 10 are explained below.

The rear cover 53 is suspended and supported around the left and right horizontal axes at the rear end of the rotary cover 50 so that it can rotate freely up and down.

The rear cover 53 rotates vertically by rotating horizontally around the shaft 59.

The rotary cover 50 is equipped with a sensor that detects the rotation of the rear cover 53.

In FIG. 9, an angle sensor K is provided. Control using the configuration in FIG. 9 is as shown in the flowchart in FIG. 14.

The configuration for detecting the tilling depth by rotating the rear cover 53 may be as shown in FIG. 10.

The rotary cover 50 has a sensor support section 34 on its outer left side.

The sensor support section 34 is U-shaped and has a sensor on the inside of the U-shape.

The sensor is provided with an upper inner sensor 32 on the upper side 34a of the sensor support portion, and a lower inner sensor 33 on the lower side 34b of the sensor support portion. Also, a butterfly plate 35 is provided on the left side of the rear cover 53. The butterfly plate 35 is configured to be able to open and close around a central axis, and the left side of the butterfly plate 35 can be folded inward from the left end face of the rear cover 53. Before starting tilling work, the butterfly plate 35 is folded and opened between the upper side 34a of the sensor support portion and the lower side 34b of the sensor support portion. During tilling work, if the tilling 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. This detects the tilling depth, and the control device P outputs to the actuator A, so that the height of the resistance rod 51 can be adjusted to the appropriate tilling depth.

The control using the configuration in Figure 10 is as shown in the flowchart in Figure 13.

The operating handle 6 is equipped with a monitor M that displays the RPM of the engine E, allowing the tilling load to be visually checked from the engine RPM. It is also equipped with a setting device that allows the target tilling load to be preset, and controls the tilling device 3 so that it is not driven above the set load value. It is desirable to provide this setting device on the operating handle 6 so that it is easy for the worker to operate.

Actuator A, which moves resistance rod 51 up and down, is set to drive a specified amount in advance. After actuator A is driven, if it moves up to the specified amount that was set in advance, actuator A is stopped.

This configuration makes it possible to avoid problems such as actuator A being driven too much, causing resistance rod 51 to move too far in either the up or down direction and protruding from holder 54.

In a tiller equipped with the resistance rod 51 shown in FIG. 3, the resistance rod 51 may be configured as follows.

In the following description, the forward, backward, left and right directions are based on the aircraft's forward direction.

As shown in Figure 4, the plate-shaped member I welded to the lower end T2 of the resistance rod 51, that is, the outer end G side of the plate-shaped member I that comes into contact with the field surface, is shaped like a fork. This shape allows the resistance rod 51 to be used as a conventional resistance rod, but by pulling out the resistance rod 51 after work, it can also be used as a cleaning tool to remove mud from the tilling tines 31, etc. Note that the shape of the outer end G side of the plate-shaped member I does not have to be fork-shaped, and it can be configured with multiple grooves on the flat surface as shown in Figure 5, or it can be shaped like a rake, or it can be any other shape.

The resistance rod 51 may also be configured as follows. As shown in Fig. 6, the upper end T1 side of the resistance rod 51 may be shaped so that the left-right width narrows from the middle of the rod-shaped part T3 toward the upper end T1. The plate-shaped member I of the resistance rod 51 may be chisel-shaped, and the outer end G side of the plate-shaped member I may be shaped so that the thickness in the top and bottom directions becomes thinner from the joint with the rod -shaped member T3 toward the outer end G. This allows the resistance rod 51 to be handled as before, but by pulling out the resistance rod 51 after work, etc., it can also be used as a cleaning tool to remove mud from the tilling tines.

As shown in FIG. 7, the width of the upper end T1 side may be narrow, and the thickness of the outer end G side may be thin. This allows the resistance rod 51 to be handled as before, but by pulling out the resistance rod 51 after work, it can also be used as a cleaning tool to remove mud from the tilling tines.

As shown in FIG. 8, the width of the upper end T1 side may be narrow, and a groove may be provided on the outer end G side. This allows the resistance rod 51 to be handled as before, but by pulling out the resistance rod 51 after work, it can also be used as a cleaning tool to remove mud from the tilling tines.

As described above, the width of the upper end T1 side may be narrowed, and a chisel-like shape with a thin outer end G side may be appropriately combined with a configuration in which the outer end G of the plate-shaped member I has a groove or cutout.

This allows the resistance rod 51 to be handled as usual, but by pulling out the resistance rod 51 after work, it can also be used as a cleaning tool to remove mud from the tilling tines.

The above configuration eliminates the need for workers to carry separate cleaning tools, improving the comfort of agricultural work.

The hood 11 may be configured as follows: A storage space is provided inside the hood 11, and 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 Figures 2 and 11, a hook is provided on the handle body 62 of the operating handle 6. A perforated stay or pin may be provided instead of the hook 36. By providing a hook 36 or the like, a net or rope can be hung on the operating handle 6, improving the efficiency of agricultural work.

REFERENCE SIGNS LIST 1 Cultivator 2 Traveling wheel 3 Cultivation device 4 Input shaft 6 Operation handle 10 Front bracket 11 Hood 12 Fuel gauge 13 Fuel filler port 20 Wheel axle 30 Cultivation shaft 31 Cultivation tines 32 Upper inner sensor 33 Lower inner sensor 34 Sensor support member 35 Butterfly plate 36 Hook 50 Rotary cover 51 Resistance rod 52 Tail wheel 53 Rear cover 54 Resistance rod holder 55 Adjustment handle 57 Pin 58 Adjustment hole 59 Shaft 61 Handle base portion 62 Handle main body portion 63 Handle grip portion 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-shaped member K Angle sensor S Sensor S1 Upper sensor S2 Lower sensor T1 Upper end portion T2 Lower end portion T3 Rod-shaped portion

Claims (2)

In a tiller equipped with a body (1), a control device (P), and a tilling device (3), the tilling device (3) is equipped with an upper inner sensor (32) and a lower inner sensor (33) that detect tilling depth, a resistance rod (51) that can move up and down, and an actuator (A) that moves the resistance rod (51) up and down, the upper inner sensor (32) and the lower inner sensor (33) input detection signals to the control device (P), and the control device (P) outputs to the actuator (A) to move the resistance rod (51) up and down, thereby controlling the tilling depth,
A U-shaped sensor support portion (34) is provided on a rotary cover (50) of the tilling device (3), the upper inner sensor (32) is provided on an inner upper side (34a) of the sensor support portion (34), and the lower inner sensor (33) is provided on an inner lower side (34b) of the sensor support portion (34),
A rear cover (53) equipped with a hinge (35) is provided at the rear of the rotary cover (50), the rear cover (53) is configured to rotate according to tilling depth, the hinge (35) is disposed between the upper side (34a) of the sensor support portion and the lower side (34b) of the sensor support portion, and the rotation of the rear cover (53) is detected by the upper inner sensor (32) and the lower inner sensor (33) reacting via the hinge (35) . This walk-behind tiller is characterized in that The walk-behind tiller of claim 1, characterized in that an upper sensor (S1) for detecting the position of the resistance rod (51) is provided at the upper part of the resistance rod (51), and a lower sensor (S2) for detecting the position of the resistance rod (51) is provided at the lower part of the resistance rod (51), 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 .