Work vehicles

Abstract

This aims to create work vehicles that are easy to operate, particularly for transporting goods. [Solution] A work vehicle comprising a vehicle body 1, a running gear 2 attached to the vehicle body 1, a cargo bed device 3, and a work hitch device 4 connecting the vehicle body 1 and the cargo bed device 3, wherein the work hitch device 4 is vertically rotatable relative to the vehicle body 1, the cargo bed device 3 can be placed on the vehicle body 1 when the work hitch device 4 rotates upward, and when the work hitch device 4 rotates downward, the cargo bed device 3 tilts backward, thereby enabling the discharge of cargo.

Description

Technical Field

[0001] The present invention relates to a work vehicle equipped with a loading platform device and performing transportation work and the like.

Background Art

[0002] As a conventional loading platform vehicle, for example, a walking type management machine is known. The walking type management machine is composed of a machine body unit, a traveling unit, and a cart unit. That is, it is configured by attaching the cart unit to the machine body unit to which the traveling unit is attached (see FIG. 4 of 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 loading platform vehicle, since traveling wheels are provided on the cart unit, there is a problem that the driving operation is troublesome during the moving travel when carrying goods.

[0005] In the present invention, in consideration of the problems of such conventional loading platform vehicles, an object is to provide a work vehicle in which the driving operation is simplified.

Means for Solving the Problems

[0006] The first aspect of the present invention is comprising a vehicle body, a traveling device attached to the vehicle body, a loading platform device, and a work hitch device for connecting the vehicle body and the loading platform device, where the work hitch device is pivotable up and down with respect to the vehicle body, The aforementioned cargo bed device is a work vehicle characterized in that it can be mounted on the vehicle body by the work hitch device rotating upward.

[0007] This allows the cargo bed equipment to be mounted on the vehicle body, making it easier to operate the vehicle.

[0008] The second aspect of the present invention is: The first work vehicle of the present invention is characterized in that the work hitch device rotates downward, causing the cargo bed to tilt backward, thereby enabling the discharge of cargo.

[0009] This makes it easier to unload cargo.

[0010] The third invention is, The aforementioned running gear is driven by an electric motor, and the main battery for driving the electric motor is located at the front of the vehicle body. The aforementioned cargo platform device can be positioned adjacent to the rear of the main battery, The second work vehicle of the present invention is characterized in that the discharge side of the cargo bed device is on the opposite side from the main battery.

[0011] This allows the main battery to be moved towards the front of the vehicle, and the cargo bed unit to be located adjacent to the main battery at the rear, thus allowing for a larger cargo bed unit. Furthermore, the discharge side of the cargo bed unit is separated from the main battery on the opposite side, thus protecting the main battery.

[0012] The fourth aspect of the present invention is The aforementioned cargo bed device is detachably attached to the aforementioned work hitch device. In the second work vehicle of the present invention, the aforementioned cargo bed device is removed, the tiller is raised to its maximum raised position while attached to the work hitch device, and then, at the maximum raised position, the tiller is removed and the cargo bed device is attached to the work hitch device in its place, so that the cargo bed device is mounted in a nearly horizontal position relative to the vehicle body.

[0013] This makes it easier to mount the cargo bed equipment in a nearly horizontal position.

[0014] The fifth aspect of the present invention is the traveling device has a left traveling part and a right traveling part, the electric motor is composed of a left motor part that drives the left traveling part and a right motor part that drives the right traveling part, and it is a work vehicle according to the third aspect of the present invention.

[0015] Thereby, since the left and right traveling parts can be controlled independently, the traveling performance is improved.

[0016] The sixth aspect of the present invention is a work vehicle according to the fifth aspect of the present invention, which is provided with a sub-battery that serves as a power source other than the traveling device in addition to the main battery.

[0017] Thereby, the life of the main battery can be prolonged.

[0018] The seventh aspect of the present invention is the vehicle body is provided with link components composed of a top link and a lower link that can rotate up and down, the work hitch device has a hitch body in 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, whereby the work hitch device is configured to be able to rotate up and down, the length of the top link is shorter than the length of the lower link, and the posture of the loading platform device can be changed from horizontal to rearward inclination by the up and down rotation of the work hitch device, and it is a work vehicle according to the sixth aspect of the present invention.

[0019] Thereby, the posture of the loading platform device can be easily changed.

[0020] The eighth aspect of the present invention is The hitch body with a U-shaped cross-section has a bracket with a U-shaped longitudinal section on its rear side, and a bearing piece is erected on the upper part of the bracket with a U-shaped longitudinal section. The loading platform device has a loading platform fixture, and the loading platform fixture has a plate part, a bracket formed by bending forward at the upper end of the plate part, a box-shaped convex part provided near the lower end of the plate part, and a plate for fixing the plate part to the loading platform device body. A hole of the bracket formed by bending of the loading platform fixture is connected to the bearing piece of the working hitch device by a pin. The working vehicle of the seventh aspect of the present invention is such that the box-shaped convex part of the loading platform fixture is fitted and fixed inside the bracket with a U-shaped longitudinal section of the working hitch device.

[0021] Thus, the working hitch device and the loading platform fixture can be reliably connected and fixed.

[0022] The ninth aspect of the present invention is The working vehicle of the eighth aspect of the present invention is such that the loading platform device body has a lower frame to which the loading platform fixture is fixed and an upper frame fixed on the lower frame.

[0023] Thus, maintenance work becomes easy.

[0024] The tenth aspect of the present invention is On the left and right of the upper surface of the upper frame, gantry-shaped horizontal fences are erected respectively, and a stop plate is arranged and fixed at the lower part of the space between both legs of the horizontal fence. The working vehicle of the ninth aspect of the present invention is such that the height of the stop plate from the upper surface of the upper frame is a predetermined height based on the loading limit of the load, and if the load is loaded more than that, the load will fall off.

[0025] Thus, overloading can be automatically prevented.

[0026] The eleventh aspect of the present invention is The tenth work vehicle of the present invention is wherein the top plate of the cargo bed device body is located below the top surface of the battery box of the main battery.

[0027] This allows for a lower center of gravity when loading cargo. [Brief explanation of the drawing]

[0028] [Figure 1] A perspective view of a work vehicle according to an embodiment of the present invention, taken from diagonally above. [Figure 2] Oblique view of the work vehicle from below. [Figure 3] Partially enlarged perspective view from above of the work vehicle. [Figure 4] Left side view of the work vehicle. [Figure 5] Left side view of the work vehicle. [Figure 6] A partially enlarged view from above of the cargo bed of the work vehicle, tilted backward. [Figure 7] Plan view focusing on the link components of the work vehicle. [Figure 8] Left side view of the work vehicle without the cargo bed attachment. [Figure 9] Left side view of the vehicle in a non-working state, with a tiller attached as a work implement and raised to its highest position. [Figure 10] Perspective view centered on the link components in the state shown in Figure 9. [Figure 11] Left side view of the work vehicle with a tiller attached as a work implement, lowered to its lowest position for operation. [Figure 12] Perspective view centered on the link components in the state shown in Figure 11. [Figure 13] Rear perspective view of the work hitch device of the work vehicle. [Figure 14] Front perspective view of the work hitch device of the work vehicle. [Figure 15] Side view of the work hitch device of the work vehicle. [Figure 16] A perspective view from below of the lower frame of the work vehicle. [Figure 17]Perspective view from above of the lower frame of the work vehicle. [Figure 18] Plan view of the lower frame of the work vehicle. [Figure 19] Perspective view from above of the upper frame of the work vehicle. [Figure 20] Perspective view from below of the upper frame of the work vehicle. [Figure 21] A partially enlarged perspective view of the upper frame of the work vehicle, taken from below. [Figure 22] Perspective view of the top plate of the work vehicle. [Figure 23] Enlarged perspective view of a portion of the top plate of the work vehicle. [Figure 24] Perspective view of the work vehicle from the outside of the side fence. [Figure 25] Perspective view from inside the side fence of the work vehicle. [Figure 26] A perspective view of the rear of the door of the work vehicle. [Figure 27] A perspective view of the front door of the work vehicle. [Figure 28] Side view of the door of the work vehicle. [Figure 29] Enlarged perspective view of a portion of the door of the same work vehicle. [Figure 30] Perspective view of the key for the work vehicle. [Figure 31] 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 work vehicle that carries cargo on a loading platform according to an embodiment of the present invention, Figure 2 is a perspective view from the lower left of the same work vehicle, Figure 3 is a partially enlarged view from above of the same work vehicle, Figure 4 is a left side view of the work vehicle during transport, and Figure 5 is a left side view of the work vehicle during unloading and discharge. Hereafter, the front and rear and left and right will be used with respect to the direction of travel.

[0031] As shown in Figures 1 to 5, a vehicle body 1 is mounted on a crawler-type running gear 2, a cargo bed 3 is positioned on the vehicle body 1, and a work hitch device 4 connects the vehicle body 1 and the cargo bed 3. A detailed explanation follows.

[0032] This work vehicle is an electrically operated, radio-controlled vehicle, and is configured to transport containers 6, soil, harvested produce, etc., by connecting a cargo bed device 3 to a lifting work hitch device 4 that can be raised and lowered.

[0033] 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 plane of the machine (see Figure 7), 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.

[0034] The length of the top link 20a is shorter than the length of the lower link 20b, and the tilt position of the cargo bed device 3 can be changed by the vertical rotation of the work hitch device 4. This allows the cargo bed device 3 to change from a horizontal position to a rearward tilt position. The base of the top link 20a (rotation pivot point 20a1) and the base of the lower link 20b (rotation pivot point 20b1) are positioned relative to the front-rear direction, with the base of the top link 20a (rotation pivot point 20a1) being shifted rearward compared to the base of the lower link 20b (rotation pivot point 20b1), making it easier for the cargo bed device 3 to assume a horizontal position when raised. The connection pivot point of the top link 20a on the work hitch device 4 side is indicated by 20a2, and the connection pivot point of the lower link 20b on the work hitch device 4 side is indicated by 20b2. The pivot point 20a2 on the work hitch device 4 side of the top link 20a is the top link shaft 4b shown in Figure 15. The pivot point 20b2 on the work hitch device 4 side of the lower link 20b is the lower link shaft 4c shown in Figure 15.

[0035] Furthermore, because the cargo bed device 3 is tilted abruptly when changed from a horizontal position to an inclined position, the soil and other materials loaded on the cargo bed device 3 can be discharged quickly.

[0036] The top link 20a and lower link 20b can be rotated up and down using an electric cylinder 10 (see Figure 8), etc. Alternatively, a hydraulic cylinder may be used instead of the electric cylinder.

[0037] In this way, with the work hitch device 4 in its highest position, the cargo bed device 3 of the work vehicle becomes horizontal to the machine body. The work hitch device 4 is originally configured to also be able to be fitted with a tilling device K. When the tilling device K is fitted to the work hitch device 4, when the work hitch device 4 is in its highest position, the tilling device K is in a non-working position and at its highest raised position, as shown in Figure 9. This makes it easier to mount the cargo bed device 3 by configuring it so that the cargo bed device 3 can be attached to the vehicle body 1 in a nearly horizontal position when the tilling device K is at its highest raised position. Figure 10 shows the link relationship when the work hitch device 4 is in its highest position.

[0038] When the work hitch device 4 is lowered to its lowest position, the tilling device K is in the working position and at its maximum lowered position (maximum tilling depth position), as shown in Figure 11. The linkage when the work hitch device 4 is in its lowest position is shown in Figure 12.

[0039] When the rod 10a of the electric cylinder 10 is pulled in the P direction (see Figures 8 and 9) when it is in the highest position, the U-shaped plate 40 (see Figures 7, 11, and 12) moves in the P direction with the U-shaped pivot axis 40a as the pivot point (see Figure 11). As a result, the pivot axis 40a rotates, and the lower link 20b, top link 20a, and work hitch device 4 move via the lift arm 20c and lift link 20d to the lowest position.

[0040] As shown above, when the trailer is in the state of the tilling device shown in Figure 9 (maximum height), attaching the trailer to the hitch results in the position of the trailer shown in Figure 4. This makes it easier to mount the trailer horizontally. Note that when the trailer is in the state of the tilling device shown in Figure 11 (lowest height), attaching the trailer to the hitch results in the position of the trailer shown in Figure 5.

[0041] The cargo bed device 3 tilts backward relative to the machine body as the work hitch device 4 moves from its highest to lowest position. As will be described later, the rear door 31e opens automatically, providing a dumping function.

[0042] The cargo bed 3 is positioned behind the main battery box 7. The top plate 31c of the cargo bed 3 is positioned below the top surface 7b of the battery box 7 in the transport state (see Figure 4). The top plate 31c of the cargo bed 3 is positioned above the motor and sub-battery in the transport state, and the center of gravity is positioned as low as possible on the underside of the aircraft. In Figure 6, the running gear 2 has a left running section and a right running section, and the electric motor consists of a left motor section 2a that drives the left running section and a right motor section 2b that drives the right running section. 8 is the sub-battery box.

[0043] The cargo bed device 3 is broadly composed of various parts, each of which can be easily fixed and assembled by inserting a pin.

[0044] The cargo bed device 3 and the work hitch device 4 will now be described.

[0045] Figures 13, 14, and 15 are perspective views of the work hitch device 4. 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.

[0046] 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. The top link 20a is connected to the top link shaft 4b of the work hitch device 4, and the lower link 20b is connected to the lower link shaft 4c, so that the work hitch device 4 is configured to rotate up and down.

[0047] 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. Notches 4eR and 4eL are formed in the left and right bearing pieces 4e. 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 cargo bed mounting fixture 30 of the cargo bed device 3 using these. 4f is a hole.

[0048] On the other hand, as shown in Figures 16, 17, and 18, the cargo bed device 3 has a cargo bed mounting bracket 30, which has a plate portion 30a, a bracket 30a1 formed by bending forward at the upper end of the plate portion 30a, a box-shaped protrusion 30b provided near the lower end of the plate portion 30a, and a plate 30c that fixes the plate portion 30a to the main body of the cargo bed device 3. The bracket 30a1 also serves as a left and right guide for the work hitch device 4.

[0049] Pins 50R and 50L, which pass through holes in the bent bracket 30a1 of the cargo bed device 3, are fitted into the notches 4eR and 4eL of the bearing piece 4e of the work hitch device 4 to connect them. In addition, the box-shaped protrusion 30b of the cargo bed device 3 is fitted and fixed inside the U-shaped bracket 4d of the work hitch device 4 in the vertical cross-section. The method of fixing is to insert the kingpin into the hole 4h1 of the work hitch device 4 in Figure 13, then into the hole 30h1 of the cargo bed device 3 in Figure 16, then into the hole 30h2 of the cargo bed device 3, and finally into the hole 4h2 of the work hitch device 4 in Figure 13 to connect the cargo bed device 3.

[0050] Furthermore, by screwing the knob bolts into the holes 30h3 of the cargo bed device 3 in Figure 16, the internal support plate (not shown) is moved closer, thereby moving the entire cargo bed device 3 towards the vehicle body.

[0051] The straight, unbent portion of the plate section 30a can be mounted perpendicular to the work hitch device 4 by contacting the end of the U-shaped bent portion of the cross-section of the work hitch device 4.

[0052] Two plates 30c are provided on the back of the plate portion 30a, which are attached to the frame of the cargo bed device body 31 of the cargo bed device 3.

[0053] The cargo bed device body 31 of the cargo bed device 3 has a lower frame 31a to which the plate 30c of the cargo bed mounting bracket 30 is fixed, and an upper frame 31b fixed on top of it (see Figure 4).

[0054] As shown in Figures 16, 17, and 18, the upper end of the plate 30c of the cargo bed mounting device 30 is shaped to conform to the shape of the two horizontal angle tubes 31a1, which are part of the lower frame 31a, in order to facilitate the attachment of these tubes. In addition, the portion of the plate 30c that attaches to the plate portion 30a is cut at an angle, so that the cargo bed portion becomes horizontal when the work hitch device 4 is in its highest position.

[0055] Three horizontal rectangular tubes 31a1 are provided horizontally, one at the front and two at the rear, forming the horizontal framework of the lower frame 31a. Furthermore, a vertical frame 31a2 is provided to sandwich the horizontal rectangular tubes 31a1 as the vertical framework of the lower frame 31a. The vertical frame 31a2 is longer than the horizontal rectangular tubes 31a1. Four through holes are provided at both ends of the vertical frame 31a2 for pins to pass through which the upper frame 31b is attached. Tubes 31a3 are provided in the through holes of the vertical frame 31a2, with a large surface area for receiving the pins, and to increase the strength of the frame. Tapered shapes are provided on both sides of the tubes 31a3 to guide the insertion of the pins.

[0056] As shown in Figures 19, 20, and 21, the upper frame 31b, which is attached to the lower frame 31a, basically consists of multiple vertical angles 31b1 extending in the vertical direction of the machine on which containers 6 and seedling trays can be placed, and horizontal angles 31b2 that fix the vertical angles 31b1 in the horizontal direction.

[0057] L-shaped angles are used for the vertical angles 31b1 in the longitudinal direction of the aircraft, and the frame is configured so that it does not flex even when a load is applied to the angle. Holes 31b11 for attaching the top plate 31c are provided at equal intervals in the center of one direction of the angle and on both sides of it. An even number of vertical angles 31b1 are provided at equal intervals, and the outermost angles are attached so that the corners of the angles face outwards, while the angles attached further inwards are attached alternately from the outermost angle.

[0058] An L-shaped horizontal angle 31b2 is provided to fix the vertical angle 31b1. This horizontal angle 31b2 is mounted so that it has a flat surface on the underside of the aircraft. This flat surface is designed to press against a corner tube provided on the main frame 5 of the aircraft when it is in the transport position (with the lifting hitch in the highest position) to stabilize the position. The end portion of the horizontal angle 31b2 that is attached to the upper frame 31b is given a large rounded shape to eliminate any dangerous protrusions.

[0059] The vertical angle 31b1 is provided with a perforated plate 31b12 for connecting to the lower frame 31a with a pin. A tube 31b13 is passed through the hole in the perforated plate 31b12. Furthermore, in order to improve strength and stability in the attachment of the lower frame 31a and the upper frame 31b, a plate 31b14 is attached to the perforated plate 31b12 in a manner that sandwiches the tube 31b13.

[0060] The tube 31b13 of the upper frame 31b and the tube 31a3 of the vertical frame 31a2 of the lower frame 31a are aligned and connected with a pin.

[0061] Four tubes 31b15 are provided on the side and end of each vertical angle 31b1 for attaching the horizontal rail 31d. Each tube 31b15 is provided with a through-hole 31b15a for inserting a retaining pin when the horizontal rail 31d is inserted.

[0062] Furthermore, on the back of the outermost vertical angle 31b1, horizontal hooks 31b16 for attaching L-shaped ropes are provided to prevent the load from shifting when placed on the loading platform. These hooks are positioned midway between the center and both ends, with the L-shaped hooks facing inward.

[0063] Furthermore, downward-facing hooks 31b21 for attaching ropes are provided at the bent portion and both ends of the horizontal angle 31b2, and the L-shaped hooks are positioned to face downwards.

[0064] A top plate 31c, as shown in Figure 22, is installed in a hole 31b11 provided on the upper surface of the upper frame 31b and in the vertical angle 31b1. The top plate 31c can be attached when it is more convenient to transport materials such as soil or sand if there are no gaps in the loading platform. The top plate 31c is made of a single thin plate and has multiple holes 31c1 at the four corners and in the center, and flat buttons 31c2 with small protrusions on the top surface are attached to these holes 31c1. By fastening the flat buttons 31c2 (see Figure 23) to the holes 31b11 made in the vertical angle 31b1, the top plate 31c is prevented from lifting up, vibration and resonance noise are suppressed, and it is made removable.

[0065] As shown in Figures 24 and 25, a horizontal fence 31d is provided that forms a side enclosure for the cargo bed by inserting it into a tube 31b15 provided on the upper frame 31b. The horizontal fence 31d has a gate-shaped round tube 31d1 into which both lower ends are inserted into the tube 31b15 of the upper frame 31b.

[0066] At the lower ends of both legs of the round tube 31d1, two through holes 31d1a are provided so that a pin passes through to the retaining hole 31b15a provided in the tube 31b15 of the vertical angle 31b1. In addition, a stop plate 31d2 is provided so that the holes through the round tube 31d1 and the tube 31b15 are on the same straight line, and the lower edges of both ends (of the stop plate 31d2) abut against the upper end surface of the tube 31b15, thereby determining the height position of the round tube 31d1 (the tube 31b15 is penetrated vertically).

[0067] In other words, the stop plate 31d2 has rounded ends, and these rounded ends contact the upper end surface of the tube 31b15, and the bent portion is attached by sandwiching the outer surfaces of the round tube 31d1 together. The stop plate 31d2 is a plate without holes and serves not only to position the round tube 31d1 in the height direction when it is attached as described above, but also as a plate to prevent soil and sand from collapsing to the side when they are being transported. Specifically, the stop plate 31d2 is positioned and fixed in the lower part of the space between the legs of the round tube 31d1, but the height of the stop plate 31d2 from the upper surface of the upper frame 31b is set to the height of the maximum weight volume that can be loaded when converted to soil and sand, and even if more is loaded than this, the soil and sand will spill out, thus minimizing damage to the aircraft.

[0068] Support plates 31d3 are provided near the upper side of both legs of the round tube 31d1 for attaching a door 31e that opens and closes when the cargo bed is dumped. The support plates 31d3 have a trapezoidal shape with a circular tip and are provided with a hole 31d3a which serves as the rotation center of the door 31e. A tube 31d4 is provided in the hole 31d3a to prevent wear at the pivot point and to improve strength. The support plates 31d3 and tube 31d4 are attached toward the inside of the bend of the round tube 31d1, and the pivot point is set so that the door 31e rotates toward the pivot point due to its own weight. The tube 31d4 is positioned so that the protrusion of the tube 31d4 is greater on the side where the plate of the stop plate 31d2 is protruding, and it extends close to the surface of the tube diameter of the round tube 31d1. Furthermore, pins 31d5 are provided on both sides of the round tube 31d1 for fixing a lock 31f that fixes the opening and closing of the door 31e.

[0069] As shown in Figures 26, 27, 28, and 29, the door 31e has a round tube 31e1 with a U-shaped bend. Plates 31e2 are attached to both legs of the round tube 31e1, with their ends bent to sandwich the outer shape of the legs of the round tube 31e1. These plates 31e2 can be opened and closed smoothly without interference, and when closed, they are shaped to prevent leakage of soil, sand, etc. Furthermore, the lower end is bent in a stepped manner, and this bent portion has a surface that contacts the frame of the upper frame 31b and acts as a stopper.

[0070] On the side of the round tube 31e1 opposite to the bending direction of the plate 31e2, a bracket 31e3 is provided, which is connected to the aforementioned support plate 31d3 and tube 31d4 and functions as a pivot point for opening and closing.

[0071] When the cargo bed side panels are attached to the round tube 31e1, stopper stays 31e4 for opening and closing are provided on both sides in a position facing outwards from the machine body. A lock 31f is rotatably attached to a pin 31d5 provided on the round tube 31d1 of the horizontal fence 31d, and when the door 31e is closed, the lock 31f can be hooked onto the stay 31e4, acting as a stopper. This lock 31f may be a retaining ring or a push nut. This lock 31f is a rectangular plate with a pivot point hole 31f1 provided at a position offset from the center to the edge (see Figures 29 and 30).

[0072] Furthermore, the work vehicle may be remotely controlled wirelessly. Emergency stop mechanisms should be provided on both the remote control side and the machine itself. This will allow for easier and safer operation.

[0073] Specifically, Figure 31 shows in more detail the configuration in the operation program of the work vehicle that is operated by a remote controller. This allows for reduced fatigue through remote operation, making it possible to work easily even in places where working postures are difficult, such as under trees in orchards.

[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] Install the control unit near the main or auxiliary battery. This makes work easier and allows for shorter wiring harnesses.

[0089] A means for adjusting the speed at will is provided (variable speed). A means for raising and lowering the discharge side of the cargo bed is provided. Operability is improved.

[0090] Furthermore, while the work vehicle is configured to be powered by a battery and electric motor as mentioned above, it may also be configured to be driven by an internal combustion engine. [Industrial applicability]

[0091] This invention relates to a work vehicle equipped with a cargo bed for transporting goods and other tasks, and is ideal for transporting containers and gravel. [Explanation of Symbols]

[0092] 1. Vehicle body 2. Traveling device 2a Left motor section 2b Right side motor section 3. Cargo bed equipment 30. Cargo bed mounting hardware 30a plate part 30a1 Bracket 30b Box-shaped protrusion 30c plate 30d Stopper 31. Cargo bed device body 31a Lower frame 31a1 Horizontal angle tube 31a2 Vertical Frame 31a3 tube 31b Upper frame 31b1 Vertical angle 31b11 Hole 31b12 Hole Plate 31b13 Tube 31b14 Plate 31b15 Tube 31b15a Retaining hole 31b16 Sideways hook 31b2 Side Angle 31b21 Downward Hook 31c Top plate 31c1 hole 31c2 Flat Button 31d horizontal fence 31d1 Round tube 31d1a Through hole 31d2 Stop Plate 31d3 Support Plate 31d3a hole 31d4 tube 31d5 pin 31e Door 31e1 Round tube 31e2 plate 31e3 bracket 31e4 Stay 31f Key 31f1 hole 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 containers 7 Main Battery Box 7a Main battery 7b Top part 8. Sub-battery box 20 Link Components 20a Top Link 20b Lower Link 20c Lift Arm 20d Liftlink 40 U-shaped plates 40a Pivot axis

Claims

1. The vehicle comprises a vehicle body, a running gear attached to the vehicle body, a cargo bed device, and a work hitch device connecting the vehicle body and the cargo bed device. The aforementioned work hitch device is capable of vertical rotation relative to the vehicle body. A work vehicle characterized in that the cargo bed device can be mounted on the vehicle body by the work hitch device rotating upward.

2. The work vehicle according to claim 1, wherein the work hitch device rotates downward, causing the cargo bed device to tilt backward, thereby enabling the discharge of cargo.

3. The aforementioned running gear is driven by an electric motor, and the main battery for driving the electric motor is located at the front of the vehicle body. The aforementioned cargo platform device can be positioned adjacent to the rear of the main battery, The work vehicle according to claim 2, characterized in that the discharge side of the cargo bed device is on the opposite side from the main battery.

4. The aforementioned cargo bed device is detachably attached to the aforementioned work hitch device. The work vehicle according to claim 2, wherein when the cargo bed device is removed, the tiller is raised to its maximum raised position while attached to the work hitch device, the tiller is removed, and the cargo bed device is attached to the work hitch device in its place at the maximum raised position, the cargo bed device is mounted in a substantially horizontal position relative to the vehicle body.

5. 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.

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

7. 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 top link is connected to the top link shaft, and the lower link is connected to the lower link shaft, so that the work hitch device is configured to be able to rotate up and down. The work vehicle according to claim 6, wherein the length of the top link is shorter than the length of the lower link, and the posture of the cargo bed can be changed from horizontal to a rearward tilt by the vertical rotation of the work hitch device.

8. The aforementioned hitch body, which has a U-shaped cross-section, has a bracket with a U-shaped vertical cross-section on its rear side, and a bearing piece is erected on the upper part of the bracket with a U-shaped vertical cross-section. The cargo bed device has a cargo bed mounting bracket, the cargo bed mounting bracket has a plate portion, a bracket formed by bending forward at the upper end of the plate portion, a box-shaped protrusion provided near the lower end of the plate portion, and a plate for fixing the plate portion to the cargo bed device body. The bearing piece of the work hitch device is connected to the hole in the bent bracket of the cargo bed mounting fixture by a pin. The work vehicle according to claim 7, wherein the box-shaped projection of the cargo bed mounting device is fitted and fixed inside the U-shaped bracket in the vertical cross-section of the work hitch device.

9. The work vehicle according to claim 8, wherein the cargo bed device body comprises a lower frame to which the cargo bed mounting bracket is fixed, and an upper frame fixed on the lower frame.

10. Gate-shaped horizontal fences are erected on the left and right sides of the upper surface of the aforementioned upper frame, and stop plates are positioned and fixed in the lower part of the space between the legs of the horizontal fences. The work vehicle according to claim 9, wherein the height of the stop plate from the upper surface of the upper frame is a predetermined height based on the load limit, and if more is loaded than that, the load will spill out.

11. The work vehicle according to claim 10, wherein the top plate of the cargo bed device body is located below the top surface of the battery box of the main battery.

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