Work vehicles

Abstract

Since one power source drives two motors, there is a challenge in that the power source's duration is shortened. [Solution] The system comprises a first prime mover and a second prime mover, a first power source dedicated to the first prime mover, and a second power source dedicated to the second prime mover, wherein the first prime mover is an electric motor 2a, 2b, the first power source is a battery 7a, the second prime mover is an internal combustion engine 26, and the second power source is fuel.

Description

Technical Field

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[0001] The present invention relates to a work vehicle equipped with a working machine such as a tiller and performing various operations.

Background Art

[0002] Conventionally, there is known a work vehicle including a work unit (tilling unit) having a working device (tilling shaft, tilling claw) and a working electric motor for driving the working device, a traveling unit having a traveling device (axle, traveling wheel) and a traveling electric motor for driving the traveling device, and a body unit having a control device and an operation unit for controlling power supply to the working electric motor and the traveling electric motor (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in such a work vehicle, since two motors are driven by one power source, there is a problem that the duration of the power source becomes short.

[0005] In the present invention, in consideration of the problems of such a conventional work vehicle, an object is to provide a work vehicle with a longer power source duration.

Means for Solving the Problems

[0006] A first aspect of the present invention is equipped with a first prime mover and a second prime mover, and characterized by including a dedicated first power source for the first prime mover and a dedicated second power source for the second prime mover.

[0007] This allows for longer working hours.

[0008] The second aspect of the present invention is: The first work vehicle of the present invention is characterized in that the first prime mover is an electric motor, the first power source is a battery, the second prime mover is an internal combustion engine, and the second power source is fuel.

[0009] This improves work efficiency by assigning the unit with the heavier load to the internal combustion engine.

[0010] The third invention is, The vehicle comprises a vehicle body, a running gear attached to the vehicle body, a work implement, and a work hitch device connecting the vehicle body and the work implement. The vehicle body is equipped with the electric motor and the main battery that drives it. This is a second work vehicle of the present invention, in which the aforementioned work machine is equipped with the aforementioned internal combustion engine and a fuel tank for the fuel that drives it.

[0011] This allows for the effective use of the advantages of both electric motors and internal combustion engines.

[0012] The fourth aspect of the present invention is The aforementioned traveling device has a left-side traveling section and a right-side traveling section, The electric motor is comprised of a left motor section that drives the left-side travel section and a right motor section that drives the right-side travel section, in this third work vehicle of the present invention.

[0013] This allows for independent left and right drive, improving operability.

[0014] The fifth aspect of the present invention is: A fourth work vehicle of the present invention is provided with a sub-battery that, in addition to the main battery, serves as a power source for devices other than the traction system.

[0015] This allows you to extend the usable time of the main battery.

[0016] The sixth aspect of the present invention is that the vehicle body is provided with link components composed of a top link and a lower link that can rotate vertically, the working hitch device has a hitch body with a U-shaped cross-section, a top link shaft attached to the upper part of the hitch body, and a lower link shaft attached to the lower part of the hitch body, the top link is connected to the top link shaft, and the lower link is connected to the lower link shaft, so that the working hitch device is configured to be able to rotate vertically, which is the working vehicle of the fifth aspect of the present invention.

[0017] This results in a structure that makes it easy to rotate the working machine vertically.

[0018] The seventh aspect of the present invention is that the working machine has a hitch fixture composed of a top plate, a front bracket drooping at the front end of the top plate, and a rear bracket drooping at the rear end of the top plate, the internal combustion engine is arranged above the top plate, a long hole formed at the lower end of the front bracket and a hole provided at the upper part of the hitch body are connected by a pin, and the mounting posture of the internal combustion engine can be adjusted by the long hole, a hole formed at the lower end of the rear bracket is connected to a predetermined location of the main body of the working machine, a hole provided at the lower part of the hitch body is connected to another predetermined location of the main body of the working machine, which is the working vehicle of the sixth aspect of the present invention.

[0019] This stabilizes the mounting of the internal combustion engine of the working machine and facilitates its position adjustment.

[0020] The eighth aspect of the present invention is that the lower surface of the front bracket is formed in a circular shape so as to correspond to the shape of the upper end portion of an elliptical gear case attached to the main body of the working machine for transmitting the power of the internal combustion engine to the drive part of the working machine, which is the working vehicle of the seventh aspect of the present invention.

[0021] As a result, the size of the working machine becomes compact.

[0022] The ninth aspect of the present invention is a connecting case is provided which connects the internal combustion engine and the gear case and positions both of them. At the lower part of the gear case, an input shaft for inputting driving force from the internal combustion engine through a drive belt is pivotally supported, and at the upper part of the gear case, an output shaft for driving the drive part of the working machine is pivotally supported. The working vehicle according to the eighth aspect of the present invention, wherein a tension mechanism for applying tension to the drive belt is attached to the connecting case.

[0023] As a result, the tension of the belt can be properly maintained, and the gear case can play the role of the axial gauge with respect to the internal combustion engine.

[0024] The tenth aspect of the present invention is a remote controller is provided for remotely operating the traveling device and the working machine. The remote operation includes at least an emergency stop operation and a traveling speed adjustment operation of the traveling device, and a lifting operation of the working machine. The working vehicle according to the ninth aspect of the present invention, wherein an emergency stop mechanism for performing the emergency stop operation of the traveling device is also provided on the vehicle body.

[0025] As a result, an emergency stop can be made remotely, which is convenient.

[0026] The eleventh aspect of the present invention is the working vehicle according to the tenth aspect of the present invention, wherein the traveling device is a traveling device using an endless track belt.

[0027] As a result, the traveling performance on a wet farm field is improved.

Brief Description of the Drawings

[0028] [Figure 1] Perspective view of the working vehicle according to the embodiment of the present invention [Figure 2] Left side view of the work vehicle. [Figure 3] Right side view of the work vehicle. [Figure 4] Front view of the work vehicle. [Figure 5] Rear view of the work vehicle. [Figure 6] Plan view of the work vehicle [Figure 7] Enlarged perspective view of a portion of the front of the work vehicle. [Figure 8] Enlarged perspective view of the link components of the work vehicle. [Figure 9] Plan view of the linkage components of the work vehicle. [Figure 10] Side view of the work vehicle with the work equipment at the top. [Figure 11] Perspective view of the work hitch device of the same work vehicle. [Figure 12] Side view of the work hitch device of the work vehicle. [Figure 13] Perspective view of the work hitch device of the work vehicle. [Figure 14] Perspective view of the work equipment of the same work vehicle. [Figure 15] Enlarged side view of part of the work equipment of the same work vehicle. [Figure 16] Enlarged perspective view of part of the work equipment of the same work vehicle. [Figure 17] Perspective view of the hitch mounting bracket on the work vehicle. [Figure 18] Perspective view of the hitch mounting bracket on the work vehicle. [Figure 19] Perspective view of the gear case of the work vehicle. [Figure 20] Perspective view of the gear case of the work vehicle. [Figure 21] Longitudinal cross-section of the gear case of the work vehicle. [Figure 22] Side view of the coupling case for the work vehicle. [Figure 23] Perspective view of the coupling case for the work vehicle. [Figure 24] Perspective view of the coupling case for the work vehicle. [Figure 25] Perspective view of the rotating mechanism of the work vehicle. [Figure 26]Perspective view of the rotating mechanism of the work vehicle. [Figure 27] Side view of the rotating mechanism of the work vehicle. [Figure 28] Rear view of the central axis of the work vehicle. [Figure 29] Perspective view of the central axis of the work vehicle. [Figure 30] Front view of the control panel for the remote controller used in the work vehicle. [Modes for carrying out the invention]

[0029] The embodiments of the present invention will be described in detail below with reference to the drawings.

[0030] Figure 1 is a perspective view from the upper left of a tilling work vehicle, which is an example of a work vehicle according to an embodiment of the present invention. Figure 2 is the left side of the same work vehicle. Figure 3 is the right side of the same work vehicle. Figure 4 is the front view of the same work vehicle. Figure 5 is the rear view of the same work vehicle. Figure 6 is the top view of the same work vehicle. Hereafter, the front and rear and left and right will be used as reference points to the direction of travel.

[0031] As shown in Figures 1 to 6, a vehicle body 1 is mounted on a crawler-type running gear 2, and a tiller, which is an example of a work implement 3, is positioned behind the vehicle body 1. A work hitch device 4 connects the vehicle body 1 and the work implement 3. A detailed explanation follows below.

[0032] This work vehicle is an electrically powered, remotely controlled vehicle with a main frame 5, and its front-to-rear orientation differs depending on the type of work. A front hitch 6 is provided at the very front of the main frame 5, where various work implements, as well as various components such as bumpers, weights, and steps, can be attached.

[0033] As shown in Figure 7, a mounting box 7 for the main battery (main battery) 7a is provided in front of the main frame 5 and behind the mounting hole for the front hitch 6. The battery 7a's outlet is located on the side of the aircraft, so that heavy objects are not inserted or removed in the direction of the aircraft's movement.

[0034] A curved plate 8 is provided on top of the main battery box 7 to act as a sunshade to protect the battery 7a from direct sunlight, and to secure switches, control components, and harnesses. The control device 9 is positioned on the plate 8, above the battery box 7. The control components are arranged around the battery box 7 to minimize the length of the harnesses.

[0035] On the front of the battery box 7 of plate 8, there is a monitor 10 that displays information about the battery 7a, a power button 11 for control functions, an emergency stop switch 12, and a power key switch 13 that supplies high voltage to the motor and main battery 7a. Power is supplied by the power button 11, and operation is possible with the key switch 13. Pressing the emergency stop switch 12 will cause an emergency stop, but power will remain supplied and subsequent operation will be possible. Turning the key switch 13 off will cause an emergency stop, but power will remain supplied, and to resume operation, the key switch 13 must be turned on again.

[0036] The power button 11, emergency stop switch 12, and key switch 13 are fixed in place, and a cover 14 is provided to cover the monitor 10 and fuse box. The monitor 10 has an opening and is provided with a sunshade.

[0037] The main frame 5 is configured to allow for the attachment of running frames to both sides. Fixed road wheels are mounted on the running frames at the rear of the machine, and movable road wheels are mounted at the front of the machine. Crawlers 15 are then attached to these frames.

[0038] Behind the main battery 7a, as shown in Figure 6, is a plate 16 for body grounding and on which a relay switch can be mounted, and a space 17 for routing the harness is provided in the center of the aircraft.

[0039] As shown in Figures 4 and 10, an electric double-acting or single-acting cylinder 18 is provided at the bottom of the main frame 5, which is attached to the main frame 5 and used to raise and lower the work machine 3.

[0040] Behind the plate 16, sub-batteries 19 for powering control equipment and for starting power such as the main battery 7a are provided on the left and right sides of the aircraft, and a space 17 is provided in the center of the aircraft for passing a harness. Behind the sub-batteries 19, a left motor unit 2a for driving the left-side running gear and a right motor unit 2b for driving the right-side running gear are provided on the left and right sides, respectively.

[0041] As shown in Figures 6 and 8, a link component 20 that forms the lifting track for the work equipment 3 is provided behind the motor sections 2a and 2b for travel. Figure 8 is an enlarged perspective view of the link component 20, and Figure 9 is an enlarged plan view. A work hitch device 4 is provided at the rear end of the link component 20, allowing for the attachment of work equipment 3 and the like.

[0042] An independently operating power source, described later, is provided on top of the work machine 3 attached to this work hitch device 4.

[0043] The battery insertion / removal, the operation of the power source for implement 3, and the control lever for implement 3 are all located on the left side of the machine. In addition, as mentioned above, a space 17 is provided in the center of the machine, from the front to the rear, through which a harness can be routed.

[0044] The layout is such that everything behind the main battery 7a is within 150mm of the outer surface of the crawler 15, providing space for additional components, such as those for transport carts or harvesting vehicles.

[0045] The front hitch 6 is positioned so that it is the first point of contact with the ground when the machine tips over, and when a bumper is attached, it is the first point of contact in the event of a collision. A tail wheel can also be attached to the front hitch 6, and when the tail wheel attached to the work machine 3 is driven on an incline, the tail wheel can be grounded to enable stable driving on inclines. The control device 9 is positioned as far away as possible from the engine and motor, which generate noise.

[0046] The work hitch device 4 can be equipped with rotary implements, ridging machines, pest control machines, transplanters, seeders, harvesters, weeders, transport carts, and more.

[0047] The lifting and lowering work equipment 3, such as a tiller, has an independent power source (internal combustion engine) installed there, which is mounted so that when it is at its lowest position it is tilted backward (10 degrees) to the ground (31.4 degrees) to the highest position it is tilted forward (31.4 degrees) to the ground (as shown in Figure 2).

[0048] The link components 20 on the vehicle body 1 side consist of a lift arm 20c, a lift link 20d, a lower link 20b, and a top link 20a. When viewed from the outside of the machine, the lift arm 20c and the lower link 20b are on the same plane, the lift link 20d is positioned inside them, and the top link 20a is positioned further inside.

[0049] As described above, the center of gravity will differ depending on the work equipment 3 attached, but by adding balance weights, etc., the center of gravity is located below the drive motor and above the two fixed road wheels, with the left and right sides in the center of the machine body.

[0050] Figures 11, 12, and 13 are drawings of the work hitch device 4.

[0051] As described above, the vehicle body 1 is equipped with a link component 20 consisting of a top link 20a and a lower link 20b that can rotate up and down, but the work hitch device 4 has a hitch body 4a with a U-shaped cross-section, a top link shaft 4b attached to the upper part of the hitch body 4a, and a lower link shaft 4c attached to the lower part of the hitch body 4a.

[0052] The work hitch device 4 is configured to be vertically rotatable by connecting the top link 20a to the top link shaft 4b and the lower link 20b to the lower link shaft 4c.

[0053] The hitch body 4a, which has a U-shaped cross-section, has a bracket 4d with a U-shaped vertical cross-section on its rear side, and a bearing piece 4e is erected on the upper part of the bracket 4d. In addition, a hole 4d1 is drilled in the lower part of the bracket 4d, and the work hitch device 4 is attached to a predetermined location on the body of the work machine 3 using this hole.

[0054] As shown in Figures 14, 15, and 16, the work machine 3 is provided with a hitch mounting device 21 for fixing an independent prime mover. The hitch mounting device 21 is connected to the work hitch device 4 using a hole 4f provided in the upper part of the work hitch device 4. The hitch mounting device 21 is provided with a top plate 21a (see Figures 17 and 18) for fixing the prime mover. The top plate 21a is provided with four elongated holes 21a1, which allow for adjustment of assembly errors of the power source and the tension of the belt, which will be described later.

[0055] In Figures 14, 15, and 16, the work hitch device 4 is depicted on the work implement 3 side for illustrative purposes, but as shown in Figure 8, it is mounted on the vehicle body 1 side via a link component 20. As shown in Figures 8, 11, and 16, the left insertion pin 3hL and the right insertion pin 3hR formed on the work implement 3 side are inserted into and connected to the left receiving portion 4hL and the right receiving portion 4hR formed on the work hitch device 4 side. The work implement 3 is connected to the bracket 4d, which is configured on the work hitch device 4 side, by inserting a kingpin (not shown) from above and below.

[0056] Furthermore, rear brackets 21b, 21b are provided at the lower rear of the top plate 21a for fixing to the hole positions on the rotary 22 side. The rear brackets 21b, 21b are Z-bent in shape and cut to conform to the shape of the underside of the top plate 21a. Two holes 21b1 for rotary mounting are provided on the non-angled Z-bent side of each rear bracket 21b, and the assembly is made easier by inserting a thin pin-type object into one of the holes as a jig.

[0057] Furthermore, a reinforcing plate 21b2 is provided between the rear brackets 21b, 21b to reinforce in the left-right direction. The reinforcing plate 21b2 is shaped to conform to the Z-bend shape of the rear brackets 21b, 21b, and is configured to ensure sufficient welding distance. The reinforcing plate 21b2 is provided with a gap S of 20 mm or more between it and the top plate 21a, allowing fingers or tools to enter. The lower end of the reinforcing plate 21b2 is positioned above the location of the hole 21b1.

[0058] Front brackets 21c, 21c are provided on the left and right sides of the front lower part of the top plate 21a and in front of the rear bracket 21b for attachment to the work hitch device 4. The front brackets 21c are provided with elongated holes 21c1 for attachment via pins to holes 4f provided in the upper part of the work hitch device 4, allowing adjustment of the mounting position and distance between the axes of the power source. The front brackets 21c are also provided with a circular cutout shape 21c2 to match the shape of the upper end of the gear case 23 of the rotary 22, which will be described later. A reinforcing plate 21c3 is provided between the front brackets 21c, 21c for lateral reinforcement.

[0059] A gear case 23 is provided that transmits power from a power source located on the top plate 21a of the hitch mounting fixture 21 via a belt 27, reverses the direction of rotation, reduces the rotational speed, and transmits power to the rotary 22.

[0060] As shown in Figures 19, 20, and 21, the gear case 23 is provided with two symmetrical gear case parts 23-1 and 23-2 made of the same material. In part 23-1, an oil filler hole 23a for both oil filler and oil inspection is provided at the top of the case center. In part 23-1, a bearing support portion 23b and an oil seal support portion for fixing the shaft gear 23c for the rotary shaft are provided below the oil filler hole 23a at the top of the case center. In part 23-1, a bearing support portion 23f and an oil seal support portion for receiving the shaft gear 23e that receives power from the power source, and a hole 23g for the output shaft of the shaft gear 23e are provided below the fixing portion of the shaft gear 23c for the rotary shaft at the center of the case. A drain hole 23d is provided below the fixing portion of the shaft gear 23e at the center of the case. External mounting holes are provided evenly spaced on both sides from the upper and lower case fastening holes in the center of the case, ensuring that oil leakage does not occur even without bolt tightening at the external mounting holes of the case. The external mounting holes, evenly spaced on both sides from the upper case fastening hole in the center of the case, have the advantage of allowing for a lower mounting configuration, reducing the gap between the power source and the case and securing space for mounting other components.

[0061] In the gear case 23-2, a bearing receiving portion 23h and an oil seal receiving portion for fixing the rotary shaft shaft gear (output shaft) 23c are provided below the groove for the oil filler port and oil inspection port at the top of the case center, and a hole is provided through which the shaft gear 23c passes. Below the fixing portion of the shaft gear 23c in the case center, a bearing receiving portion 23i is provided to receive the shaft gear (input shaft) 23e that receives power from the power source. External mounting holes are provided evenly spaced on both sides from the upper and lower case fastening holes in the case center, and the case is configured so that oil leakage does not occur even if bolts are not tightened in the external mounting holes of the case. The external mounting holes that are evenly spaced on both sides from the upper case fastening hole in the case center have the characteristic of allowing for a lower mounting configuration, which reduces the gap between the power source and the case and secures space for mounting other parts.

[0062] Next, the shaft gear 23e is provided with a square shaft portion 23j to which a pulley for receiving power from a power source is attached. The shaft gear 23e is provided with a gear portion with fewer teeth than the gear portion of the shaft gear 23c. The gear portion provided in the shaft gear 23e is provided with bearing receiving steps on both sides.

[0063] In the shaft gear 23c, splines for transmitting power to the rotary are provided on the inner diameter. A gear section with a larger number of teeth than the gear section of the shaft gear 23e is provided. The gear section of the shaft gear 23c is provided with bearing receiving steps on both sides.

[0064] As shown in Figures 22, 23, and 24, a connecting case 24 is provided to connect the gear case 23 to an engine 26, which is an example of an internal combustion engine 26 (see Figures 15 and 16). The connecting case 24 acts as a distance gauge between the gear case 23 and the engine 26. The connecting case 24 also acts as a lateral distance gauge for the gear case 23 relative to the engine 26.

[0065] Flange sections 24a and 24b are provided on both sides to provide strength for fixing the engine 26 and the gear case 23. Power is transmitted from the engine 26 to the gear case 23 by a belt 27, and a hole 24c for attaching a tension spring device that can adjust the tension of the belt 27 is provided in one of the flange sections 24b.

[0066] The upper part of the connecting case 24 is provided with a recess 24d shaped to accommodate the engine output shaft, and two holes 24e, 24e for engine mounting. Furthermore, a hole 24f is provided in the center, sized so as not to interfere with the engine oil drain bolt.

[0067] Furthermore, a hole 24g is provided at the bottom for attachment to a recessed portion of the gear case 23, and a notch 24h is provided that follows the outer shape of the gear case 23. A reinforcing flange 24i is provided on the back side for reinforcement in the opposite direction to the flange direction.

[0068] As shown in Figures 15 and 16, a central shaft 29 is passed through holes in both the gear case 23 and the connecting case 24, and the two are fastened together, with this point serving as the pivot point to realize a tension mechanism that applies tension to the drive belt. Figures 25, 26, and 27 show the components of this tension mechanism. Specifically, the rotating tool 28 is its main component. A tube 28a for rotation is provided at its lower part, and a pin 28b for attaching a pulley that applies tension to the belt 27 is provided at its upper part. Furthermore, two grooves 28b1 are provided for attaching retaining rings that fix the position of the pulley on the pin 28b.

[0069] Furthermore, a plate 28c is provided with a hole for attaching a clutch spring or the like when connecting the tube 28a and the pin 28b and applying tension. The portion of the plate 28c where the tube 28a is attached is cut out in an arc shape, 28c1. The portion where the pin 28b is attached is provided with a hole 28c2, and the holes in the cutout 28c1 and 28c2 are on the same center line.

[0070] When fastening the tube 28a together with the central shaft 29, as shown in Figures 28 and 29, the central shaft 29 is provided with a stepped section that is longer than the tube 28a. The header section of the central shaft 29 is oval-shaped and configured to allow bolt fastening.

[0071] On the other hand, the tension of the spring 31 can be adjusted by placing the spring 31 through a hole 28c3 formed near the center of the plate 28c and attaching the spring 31 to the hole 24c of the flange of the connecting case 24 using an I-bolt 30.

[0072] As described above, the work vehicle according to the embodiment of the present invention is equipped with a first prime mover (e.g., an electric motor) and a second prime mover (e.g., an internal combustion engine), and is equipped with a first power source (main battery) dedicated to the first prime mover and a second power source (fuel tank 32) dedicated to the second prime mover. With this configuration, it is possible to operate for a long time.

[0073] Figure 30 shows a configuration in the operation program for a work vehicle that is operated by a remote controller. This allows for reduced fatigue through remote operation, making it easier to work in places such as orchards, under trees, or in other places where working postures are difficult.

[0074] Specifically, the controller is equipped with LEDs that light up in multiple colors. Main gear 1 is assigned to button 1 on the controller, and pressing button 1 at any time during operation will change the travel speed to the work speed, which will be set to 0.5 km / h. Main gear 2 is assigned to button 2 on the controller, and pressing button 2 at any time during operation will change the travel speed to the work speed, which will be set to 1 km / h. Main gear 3 is assigned to button 3 on the controller, and pressing button 3 at any time during operation will change the travel speed to the work speed, which will be set to 2.3 km / h. Main gear 4 is assigned to button 4 on the controller, and pressing button 4 at any time during operation will change the travel speed to the work speed, which will be set to 4.6 km / h.

[0075] In normal mode, pressing button 5 moves the robot forward, and releasing the button stops it. Pressing button 6 moves the robot backward, and releasing the button stops it. Pressing button 7 performs a pivot turn to the left, using the robot's center as the axis, and releasing the button stops it. Pressing button 8 performs a pivot turn to the right, using the robot's center as the axis, and releasing the button stops it. Pressing button 5 and button 7 simultaneously causes the robot to move forward while turning left using the left running gear as the pivot point, and releasing the button stops it. Pressing button 5 and button 8 simultaneously causes the robot to move forward while turning right using the right running gear as the pivot point, and releasing the button stops it. Pressing button 6 and button 7 simultaneously causes the robot to move backward while turning left using the left running gear as the pivot point, and releasing the button stops it. In normal mode, pressing button 6 while simultaneously pressing button 8 will cause the aircraft to move backward and turn right using the right drive unit as a pivot point. Releasing the buttons will stop the aircraft.

[0076] Furthermore, the controller's LED flashes when button 9 is pressed, allowing the user to change the operating mode. Pressing button 9 switches the operation method for buttons 5 and 6 only, and the buttons continue to function even after being released.

[0077] The controller's LED lights up when button 10 is pressed, allowing the user to change the operating mode. Pressing button 10 switches the operation method for buttons 5 and 6 only, and releasing buttons 5 and 6 after pressing them stops the operation.

[0078] Pressing button 11 resets the main gear to 0 and also engages parking. Pressing button 11 also resets the data for each communication, allowing you to return to a normal state if you notice any issues with the operation's sensitivity or malfunctions.

[0079] Pressing button 12 allows you to pair and unpair the controller with this device.

[0080] In other words, 1. Each of the four main gear buttons has a predetermined speed, such as the optimal driving speed for tilling work, and is used when you need to adjust the speed carefully or when you want to switch speeds instantly.

[0081] 2. Regarding the variable speed lever, the speed increases while the lever is raised and decreases while the lever is lowered relative to the current speed.

[0082] 3. Sharing is a method for pairing the controller with this device. For the initial connection only, it resets the controller's pairing history and searches for a pairing target.

[0083] 4. Mode Change (C): The (C) stands for CLICK, and this mode allows the device to continue the previously instructed action even after you release the button once. This is useful in situations where you don't need to press buttons for extended periods, such as during long-distance travel. In other words, once you press the mode (c) button, the device will move when you operate other buttons or levers, and will continue moving even after you stop operating the buttons or levers.

[0084] 5. Mode (P) stands for PUSH, meaning that the action corresponding to the button is performed only while the button is pressed. The aircraft automatically stops when you release the button, making it a very safe mode. In other words, once you press Mode (P), the aircraft will only move while you are operating other buttons or levers, and will stop when you stop operating the buttons or levers.

[0085] 6. The reset button instantly returns the aircraft to its initial startup state in cases such as when the set flight speed is lost, a communication problem occurs, or an alert is issued. However, in the case of an alert that has a significant impact on the aircraft, the reset button cannot be used to return to the initial state. It also serves as an emergency stop.

[0086] 7. To unpair, disconnect the connection between this unit and the controller and turn off the controller's power. Turning off this unit's power will also unpair the devices, but the controller will remain powered on for a while as it searches for the lost communication signal and will not immediately turn off.

[0087] As described above, a remote controller is provided for remotely operating the traveling device 2 and the work implement 3. The remote operation includes at least emergency stop operation and travel speed adjustment operation of the traveling device 2, as well as lifting and lowering operation of the work implement 3. An emergency stop mechanism for emergency stop operation of the traveling device 2 is also provided on the vehicle body 1.

[0088] It goes without saying that, although the implements of the present invention have been described primarily as cultivators in the above embodiments, they are not limited to cultivators. [Industrial applicability]

[0089] Since this invention provides a work vehicle with a longer power supply duration, it is ideal for work vehicles equipped with implements such as cultivators that perform various tasks. [Explanation of symbols]

[0090] 1. Vehicle body 2. Traveling device 2a Left motor section 2b Right side motor section 3. Work equipment 4. Work hitch device 4a Hitch body 4b Top link shaft 4c Lower Link Shaft 4D Bracket 4e bearing piece 4f hole 5 Mainframe 6. Front hitch 7 Main Battery Box 7a Main Battery 8 plates 9 Control device 10 monitors 11 Power button 12. Emergency stop switch 13 Key Switches 14 Cover 15 Crawler 16 plates 17 spaces 18 cylinders 19. Sub-battery 20 Link Components 20a Top Link 20b Lower Link 20c Lift Arm 20d Liftlink 21 Hitch mounting hardware 21a Top plate 21a1 long hole 21b Rear bracket 21b1 hole 21b2 Reinforcement plate 21c Front Bracket 21c1 hole 21c2 Notch 21c3 Reinforcement plate 22 Rotary 23 Gear Case 23-1 Gear case parts 23-2 Gear Case Parts 23a Fueling port 23b Bearing support section 23c shaft gear 23d Oil drain hole 23e Shaft Gear 23f Bearing mounting section 23g hole 23h, 23i Bearing mounting section 23j Square shaft section 24 Linked Cases 24a, 24b Flange section 24c hole 24d recess 24e, 24f hole 24h notch 24i Reinforcement Flange 26. Internal combustion engine 27 belts 28-movement device 28a Tube 28b pin 28b1 Groove 28c plate 28c1 Notch 28c2, 28c3 hole 29 Center axis 30 I-bolt 31 Spring 32 Fuel Tank S Gap

Claims

1. Equipped with a first prime mover and a second prime mover, A work vehicle characterized by comprising a first power source dedicated to the first prime mover and a second power source dedicated to the second prime mover.

2. The work vehicle according to claim 1, wherein the first prime mover is an electric motor, the first power source is a battery, the second prime mover is an internal combustion engine, and the second power source is fuel.

3. The vehicle comprises a vehicle body, a running gear attached to the vehicle body, a work implement, and a work hitch device connecting the vehicle body and the work implement. The vehicle body is equipped with the electric motor and the main battery that drives it. The work vehicle according to claim 2, wherein the work machine is provided with the internal combustion engine and a fuel tank for fuel to drive it.

4. The aforementioned traveling device has a left-side traveling section and a right-side traveling section. The work vehicle according to claim 3, wherein the electric motor comprises a left motor section that drives the left travel section and a right motor section that drives the right travel section.

5. The work vehicle according to claim 4, further comprising a sub-battery that, in addition to the main battery, provides a power source other than the drive system.

6. The vehicle body is equipped with a linkage component consisting of a top link and a lower link that can rotate vertically. The aforementioned work hitch device comprises a hitch body with a U-shaped cross-section, a top link shaft attached to the upper part of the hitch body, and a lower link shaft attached to the lower part of the hitch body. The work vehicle according to claim 5, wherein the work hitch device is configured to be vertically rotatable by connecting the top link to the top link shaft and the lower link to the lower link shaft.

7. The aforementioned work machine has a hitch mounting device which is composed of a top plate, a front bracket hanging down from the front end of the top plate, and a rear bracket hanging down from the rear end of the top plate. The internal combustion engine is positioned above the aforementioned top plate. An elongated hole formed at the lower end of the front bracket and a hole provided at the upper part of the hitch body are connected by a pin, and the mounting position of the internal combustion engine can be adjusted by the elongated hole. The hole formed at the lower end of the rear bracket is connected to a predetermined location on the main body of the work machine. The work vehicle according to claim 6, wherein a hole provided in the lower part of the hitch body is connected to another predetermined location on the body of the work machine.

8. The work vehicle according to claim 7, wherein the lower surface of the front bracket is formed in a circular shape to correspond to the shape of the upper end of an elliptical gear case attached to the body of the work machine for transmitting the power of the internal combustion engine to the drive unit of the work machine.

9. A connecting case is provided that connects the internal combustion engine and the gear case, and also positions both of them. An input shaft, which receives driving force from the internal combustion engine via a drive belt, is pivotally supported at the lower part of the gear case, and an output shaft, which drives the drive unit of the work machine, is pivotally supported at the upper part of the gear case. The work vehicle according to claim 8, wherein the coupling case is fitted with a tension mechanism for applying tension to the drive belt.

10. A remote controller is provided for remotely operating the aforementioned traveling device and the aforementioned work machine. The remote control includes at least the emergency stop operation and travel speed adjustment operation of the travel device, and the raising and lowering operation of the work machine, The work vehicle according to claim 9, wherein the emergency stop mechanism for performing the emergency stop operation of the running gear is also provided on the vehicle body.

11. The work vehicle according to claim 10, wherein the aforementioned running device is a running device that utilizes an endless track belt.

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