Management machine

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

[Technical field]

[0001] The present invention relates to a walk-behind tiller. [Background technology]

[0002] 2. Description of the Related Art As with the technique disclosed in Patent Document 1, conventionally, cultivators that till farm fields and perform ridge formation and other operations are known.

[0003] Conventional walk-behind tillers are equipped with a tail wheel that enables the tiller to travel without the tiller tines touching the ground when moving around. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2003-310001 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, according to the configuration of the above-mentioned conventional walk-behind tiller, the tilling implement is moved to adjust the tilling depth, which makes the configuration complicated.

[0006] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a walk-behind tiller that is capable of automatically adjusting tilling depth with a simple structure that involves raising and lowering a resistance rod. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention provides the following technical solutions.

[0008] The invention according to claim 1 relates to a tiller having a body (1) including a control device (P) and a tilling implement (3), the tilling implement (3) having a tilling depth detection device. Upper inner sensor (32) and lower inner sensor (33), and The actuator (A) is provided for moving the resistance rod (51) up and down, and the resistance rod (51) is moved up and down. Upper inner sensor (32) and lower inner sensor (33) A detection signal is input to the control device (P), and the control device (P) outputs the signal to the actuator (A) to move the resistance rod (51) up and down, thereby controlling the tilling depth. The composition is as follows: A U-shaped sensor support portion (34) is provided on a rotary cover (50) of the tilling implement (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) with a hinge (35) attached thereto is provided at the rear of the rotary cover (50), and the rear cover (53) is configured to rotate according to the tilling depth, and the hinge (35) is disposed between the sensor support portion inner upper side (34a) and the sensor support portion inner lower side (34b). 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 is a walk-behind tiller characterized by the above.

[0009] The invention according to claim 2 is as follows: An upper sensor (S1) for detecting the position of the resistance rod (51) is provided on the upper part of the resistance rod (51), and a lower sensor (S2) for detecting the position of the resistance rod (51) is provided on the lower part of the resistance rod (51). 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. 2. The walk-behind cultivator according to claim 1, wherein:

[0010] delete

[0011] delete Effect of the Invention

[0012] According to the invention as defined in claim 1, Upper inner sensor (32) and lower inner sensor (33) The tilling depth is detected by the tilling sensor (4), 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, so the worker does not have to manually adjust the tilling depth, making farm work more comfortable. The movement of the rear cover (53) that constitutes the tilling device (3) is detected by the upper inner sensor (32) and the lower inner sensor (33) via a hinge (35). Furthermore, 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.

[0013] According to the present invention as defined in claim 2, In addition to the effect 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 range 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).

[0014] delete

[0015] delete [Brief description of the drawings]

[0016] [Figure 1] Side view of the walk-behind tiller of the present invention [Diagram 2] Side view of the walk-behind tiller of the present invention [Diagram 3] FIG. 2 is a perspective view of a resistance bar of the walk-behind tiller of the present invention. [Figure 4] FIG. 2 is a perspective view of a resistance bar of the walk-behind tiller of the present invention. [Diagram 5]FIG. 2 is a perspective view of a resistance bar of the walk-behind tiller of the present invention. [Figure 6] FIG. 2 is a perspective view of a resistance bar of the walk-behind tiller of the present invention. [Figure 7] FIG. 2 is a perspective view of a resistance bar of the walk-behind tiller of the present invention. [Figure 8] FIG. 2 is a perspective view of a resistance bar of the walk-behind tiller of the present invention. [Figure 9] FIG. 2 is a perspective view of a main part of the tilling device of the walk-behind tiller of the present invention. [Figure 10] FIG. 2 is a perspective view of a main part of the tilling device of the walk-behind tiller of the present invention. [Figure 11] FIG. 1 is a perspective view of a walk-behind cultivator according to the present invention. [Figure 12] FIG. 2 is a control block diagram of the present invention. [Figure 13] FIG. [Figure 14] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] The basic configuration and operation of a body 1 of a walk-behind axle cultivator according to one embodiment of the present invention will now be described in detail.

[0018] In the description of the embodiment, the left and right directions facing the forward movement direction of the machine body 1 are referred to as left and right, respectively, and the forward movement direction is referred to as front and the rearward movement direction is referred to as rear, but this does not limit the configuration of the present invention.

[0019] The explanation will be based on FIG.

[0020] The body 1 of the walk-behind cultivator has a front bracket 10 on the front side, an engine E etc. 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 various parts, running wheels 2L and 2R are provided on the left and right in front of the transmission case D, and a cultivator 3 on the rear side. A fuel tank that supplies fuel to the engine E is provided above the engine E, and a hood 11 that covers the engine E etc. from above is provided on the hood 11, which is equipped with a fuel gauge 12 that checks the remaining fuel level and a fuel filler port 13 for adding fuel to the fuel tank.

[0021] The drive power of the engine E is transmitted to the input shaft 4 of the transmission case D via a 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 implement 3.

[0022] The transmission case D has an upper portion provided with a handle base portion 61 of the operating handle 6.

[0023] The operating handle 6 used to operate the machine body 1 comprises a handle base portion 61, a handle main 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 main body portion 62 and the handle root portion 61.

[0024] The machine body 1 is equipped with an operating handle 6 and a control device P that receives signals from sensors S provided on the operating handle 6 and at predetermined positions on the machine body 1 and controls each section.

[0025] The control device P detects the response from the sensor S and controls the drive shafts, such as the wheel axle 20 and the tillage axle 30, that drive the working unit.

[0026] As shown in FIG. 1, the tilling implement 3 is configured to include a plurality of tilling tines 31 on a tilling shaft 30 that rotates about a horizontal axis, and includes a rotary cover 50 that covers above the rotation trajectory of the tilling tines 31.

[0027] In addition, a resistance rod 51, a tail wheel 52, and a rear cover 53 are provided at the rear of the rotary cover 50.

[0028] The rear cover 53, which rotates up and down on a shaft 59 which is a left-right shaft, rotates upward when the tilling depth of the tilling implement 3 becomes shallow and rotates downward when the tilling depth becomes deep.

[0029] It should be noted that the state shown in FIG. 1 is a state in which 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.

[0030] The resistance rod 51 is inserted into the resistance rod holder 54 as shown in FIG. 1, and can be adjusted up and down by using the adjustment handle 55.

[0031] The adjustment handle 55 is provided with an actuator A, and the adjustment handle 55 is rotated by the operation of the actuator A (electrical components related to the actuator A are not shown).

[0032] The resistance rod 51 and resistance rod holder 54 in FIG. 1 are screwed together, and the resistance rod 51 is adjusted by rotating an adjustment handle 55.

[0033] An upper sensor S1 is provided on the upper side of the resistance rod 51, and a lower sensor S2 is provided on the lower side.

[0034] The upper sensor S1 and the lower sensor S2 react when they rise or fall too far so as to approach the upper or lower ends of the resistance bar holder 54.

[0035] Actuator A moves resistance rod 51 up and down within a section where upper sensor S1 or lower sensor S2 do not react, thereby preventing damage to resistance rod 51, resistance rod holder 54, and actuator A. If it were to move endlessly upward, the lower end of resistance rod 51 would get caught on resistance rod holder 54, causing deformation and damage to resistance rod 51 and resistance rod holder 54, and there is also the risk that actuator A would be damaged due to overload, but this can be prevented by the above configuration. Also, if it were to move endlessly downward, there is also the risk that resistance rod 51 would fall off and deform, and actuator A would be damaged due to overload, but this can be prevented by the above configuration.

[0036] Another configuration of the tiller of FIG. 1 will be described below.

[0037] Holes are drilled in the left and right walls of the rotary cover 50, and a sensor is bolted to the holes (not shown), so that the sensor reacts when the resistance rod 51 moves up or down beyond a certain position.

[0038] In addition, in a configuration in which a sensor is bolted to a mounting hole, the mounting hole may be an elongated hole so that the bolt fastening position can be adjusted as desired.

[0039] In response to the sensor, the actuator A automatically adjusts the resistance rod 51 up and down, but this control may be switched on and off. In that case, it is preferable that the control device be provided on the operating handle 6.

[0040] The cultivator of FIG. 2 will now be described.

[0041] The basic configuration of the tiller in FIG. 2 is generally similar to that of the tiller in FIG. 1, but the configuration of the resistance rod 51 is different.

[0042] The resistance rod 51 and the resistance rod holder 54 are provided with adjustment holes 58, and the resistance rod 51 can be adjusted up or down by fastening a pin 57 at a desired position.

[0043] The structure for adjusting the height of the resistance rod 51 does not have to be the handle operation type shown in FIG. 1 or the pin fastening type shown in FIG.

[0044] The configurations of Figs. 9 and 10 will be described.

[0045] A rear cover 53 is suspended and supported around the left and right horizontal axes at the rear end of the rotary cover 50 so as to be vertically rotatable.

[0046] The rear cover 53 rotates about a shaft 59 in the horizontal direction and thereby in the vertical direction.

[0047] The rotary cover 50 is provided with a sensor that detects the rotation of the rear cover 53 .

[0048] 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.

[0049] The configuration for detecting the tilling depth by the rotation of the rear cover 53 may be as shown in FIG.

[0050] The rotary cover 50 is provided with a sensor support portion 34 on its outer left side surface.

[0051] The sensor support portion 34 is U-shaped and has a sensor inside the U-shape.

[0052] The sensor is provided with an upper inner sensor 32 on the inner upper side 34a of the sensor support portion, and a lower inner sensor 33 on the inner 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 so that it can be opened and closed 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 the sensor support portion Inner upper side 34a and the sensor support inner lower side34b. 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 inside sensor 32 and the lower inside 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 make the tilling depth appropriate.

[0053] Control according to the configuration of FIG. 10 is as shown in the flowchart of FIG.

[0054] 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. In addition, a setting device is provided that allows a target tilling load to be preset, and controls the tilling implement 3 so that it will not be 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 operator to operate.

[0055] Actuator A, which moves resistance rod 51 up and down, is set in advance to drive a specified amount. After actuator A is driven, when it has moved up to the preset specified amount, actuator A is stopped.

[0056] 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.

[0057] In a cultivator having the resistance rod 51 shown in FIG. 3, the resistance rod 51 may be configured as follows.

[0058] In the following description, the forward, backward, left and right directions are based on the direction of flight of the aircraft.

[0059] As shown in Fig. 4, the plate-shaped member I welded to the lower end T2 of the resistance rod 51, i.e., 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 tiller 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 may be a configuration with multiple grooves on the flat surface as shown in Fig. 5, a rake-like shape, or any other shape.

[0060] The resistance rod 51 may have the following configuration. As shown in Fig. 6, the upper end T1 side of the resistance rod 51 may have a shape in which the left and 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 have a shape in which the thickness in the top and bottom directions becomes thinner from the joint with the rod-shaped member T3 toward the outer end G. 。 As a result, the resistance rod 51 can be handled as before, but by pulling out the resistance rod 51 after work, it can also be used as a cleaning tool for removing mud from the tilling tines.

[0061] 7, the resistance rod 51 may have a narrow width on the upper end T1 side and a thin thickness on the upper and lower sides of 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, it can also be used as a cleaning tool to remove mud from the tilling tines.

[0062] 8, the width on 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.

[0063] The configuration may be such that the width on the left and right side of the upper end T1 is narrowed and the thickness on the outer end G side is reduced, as described above, and that a chisel-shaped shape is provided with a groove or notch on the outer end G of the plate-shaped member I is appropriately combined.

[0064] As a result, the resistance rod 51 can be handled as before, but by pulling out the resistance rod 51 after work, it can also be used as a cleaning tool for removing mud from the tilling tines.

[0065] With the above configuration, the worker does not need to carry separate cleaning tools, improving the comfort of agricultural work.

[0066] The hood 11 may be configured as follows: A storage space is provided inside the hood 11, and tools such as a net and a rope can be stored in the storage space.

[0067] 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 the hook 36 or the like, a net or rope can be hung on the operating handle 6, improving the efficiency of agricultural work. [Explanation of symbols]

[0068] 1 tiller 2 Running wheels 3 Tillage equipment 4 Input Shaft 6 Operating handle 10 Front bracket 11. Food 12 Fuel Gauge 13 Fuel filler 20 Wheel axle 30 Tilling axis 31 Cultivating Claw 32 Upper inner sensor 33 Lower inner sensor 34 Sensor support member 35 Butterfly board 36 Hook 50 Rotary cover 51 resistance rod 52 Tail wheel 53 Rear cover 54 Resistance bar holder 55 Adjustment handle 57 pin 58 Adjustment hole 59 Axis 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 edge I Plate-shaped member K Angle Sensor S Sensor S1 Upper Sensor S2 Lower Sensor T1 top end T2 bottom end T3 rod part

Claims

1. 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

2. 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) enters a detection state, the control device (P) is capable of controlling the actuator (A) to stop.

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