Work vehicle

Abstract

We provide work vehicles that can be used for transporting goods and other tasks. [Solution] The work vehicle 10 comprises a vehicle body 11 having a cargo bed 22 and capable of movement, a conveyor device 50 capable of sending out objects loaded on the cargo bed 22, and a turntable 60 provided on the cargo bed 22, to which a work device 90 can be attached and detached.

Description

Technical Field

[0001] The present invention relates to a work vehicle.

Background Art

[0002] Patent Document 1 discloses a work vehicle used in an orchard or the like. The conventional work vehicle disclosed in Patent Document 1 is a vehicle mainly assumed to be used for transportation work after harvesting, and is effective in labor saving for work of transporting loads such as harvested products.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] It is more preferable that the work vehicle can be used not only for transportation work of loads and the like but also for other work. However, the work vehicle does not have a structure and equipment that can add a work device or the like, and it is difficult to use it for work other than transportation work of loads and the like.

[0005] Therefore, an object of the present disclosure is to provide a work vehicle that can be used for transportation work of loads and the like and other work.

Means for Solving the Problems

[0006] The work vehicle of the present disclosure includes a vehicle body having a loading platform and capable of traveling, a conveyor device capable of sending out an object mounted on the loading platform, and a turntable provided on the loading platform, and a work device is detachable from the turntable.

Effects of the Invention

[0007] The work vehicle described herein can be used for transporting goods and other items, as well as for other tasks. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a side view of a work vehicle according to the first embodiment. [Figure 2] Figure 2 is a plan view of the work vehicle shown in Figure 1. [Figure 3] Figure 3 is an explanatory diagram of the support mechanism at the right front of the work vehicle according to the first embodiment. [Figure 4] Figure 4 is an explanatory diagram illustrating the transfer of goods and other items by a work vehicle according to the first embodiment. [Figure 5] Figure 5 is a plan view showing the rotation of the turntable of the work vehicle shown in Figure 1. [Figure 6] Figure 6 is an explanatory diagram illustrating the process of changing the direction of cargo, etc., by a work vehicle according to the first embodiment. [Figure 7] Figure 7 is a control block diagram of the work vehicle. [Figure 8] Figure 8 is an explanatory diagram of attitude control in a work vehicle. [Figure 9] Figure 9 is a side view of a modified work vehicle (motorized motor) having a vehicle body. [Figure 10] Figure 10 is a block diagram of the work vehicle (electric motor). [Figure 11] Figure 11 is a schematic perspective view showing a work vehicle according to the second embodiment. [Figure 12] Figure 12 is an explanatory diagram showing the installation of the work equipment on the turntable. [Figure 13] Figure 13 is an explanatory diagram illustrating a modified example of the installation of the work device on the turntable. [Figure 14] Figure 14 is a schematic perspective view showing a work vehicle according to the third embodiment. [Figure 15] Figure 15 is an explanatory diagram of how to install the tank on the truck bed. [Modes for carrying out the invention]

[0009] <Summary of Embodiments of the Present Disclosure> The summary of the embodiments of the invention of the present disclosure will be listed and described below. (1) The work vehicle of the present disclosure includes a vehicle body having a loading platform and capable of traveling, a conveyor device capable of sending out an object mounted on the loading platform, and a turntable provided on the loading platform. A working device is detachable from the turntable.

[0010] According to the work vehicle having the above configuration, when loading and unloading goods or the like on the loading platform, the direction of the goods or the like can be changed by the turntable provided on the loading platform, and the object such as the goods can be moved by the conveyor device provided on the turntable. Further, according to the work vehicle having the above configuration, when a working device is attached to the loading platform, it can be used for work other than the transportation work of goods or the like. Therefore, the work vehicle having such a configuration can be used for the transportation work of goods or the like and other work.

[0011] (2) The work vehicle according to the aspect (1) of the present disclosure preferably further includes a power outlet provided on the turntable and capable of connecting a cable of the working device. When a working device is attached to the loading platform, the work vehicle having the above configuration can supply power to the working device through the power outlet. The work vehicle having such a configuration can provide a working device operated by electricity on the loading platform.

[0012] (3) In the work vehicle according to the aspect (1) or (2) of the present disclosure, the vehicle body includes a plurality of wheels respectively located at the front and rear on both left and right sides of the vehicle body, and a support mechanism capable of changing the distance between the grounding surface of the wheels and the vehicle body. The support mechanism preferably can horizontally control the vehicle body. The work vehicle with the above configuration can horizontally control the vehicle body and keep the loading platform horizontal by means of a support mechanism. Further, when loading and unloading goods or the like on the loading platform, the work vehicle of the present disclosure can adjust the posture of the loading platform by means of the support mechanism. The work vehicle with such a configuration can reduce the burden on the operator for the loading and unloading work of goods or the like.

[0013] (4) In the work vehicle according to any one of the above (1) to (3) aspects of the present disclosure, it is preferable that the conveyor device is arranged point-symmetrically with respect to the rotation center of the turntable. According to the above configuration, by rotating the turntable, the conveying direction of the conveyor device can be adjusted to the direction for loading and unloading goods or the like. Thereby, the working efficiency of the work for loading and unloading goods or the like can be improved.

[0014] (5) In the work vehicle according to the aspect (4) of the present disclosure, the conveyor device is a belt conveyor, and it is preferable that the belt conveyor is arranged at a position including the rotation center of the turntable. According to the above configuration, by rotating the turntable, the conveying direction of the belt conveyor can be adjusted to the direction for loading and unloading goods or the like. Thereby, the working efficiency of the work for loading and unloading goods or the like can be improved.

[0015] (6) In the work vehicle according to any one of the above (2) to (5) aspects of the present disclosure, the conveyor device is arranged on the turntable, and it is preferable that the power supply outlet is arranged outside the conveyor device on one side and the other side in the width direction of the conveyor device. The work vehicle with the above configuration can reliably connect the working device arranged on the turntable and the power supply outlet by providing power supply outlets on both sides in the width direction of the conveyor device.

[0016] (7) The work vehicle according to any one of the above (1) to (6) aspects of the present disclosure includes the working device, and it is preferable that the working device can be operated by the power supplied from the power supply outlet. The work vehicle with the above configuration can perform tasks other than transporting goods, etc., using a work device installed on a turntable. The work vehicle of this disclosure does not require a drive source (engine, etc.) for the work device, and since the work device can be rotated by the turntable, there is no need to provide a rotation mechanism for the work device itself, thereby simplifying the configuration of the work device.

[0017] (8) In any of the embodiments of (1) to (7) of the present disclosure, the turntable is preferably provided with a mounting portion to which the work device can be attached. The work vehicle with the above configuration allows for easy attachment of the work device to the turntable via the mounting portion. Furthermore, the work vehicle of this disclosure allows for precise positioning of the work device relative to the turntable via the mounting portion.

[0018] (9) In any of the embodiments of (1) to (8) of the present disclosure, the loading platform preferably has a flat portion formed on the radially outer side of the turntable. In the aforementioned configuration, the work vehicle can place cargo on a flat area radially outside the turntable. This allows for the sorting and transport of cargo that needs to be turned using the turntable from other cargo.

[0019] <Details of Embodiments of the Invention in This Disclosure> The embodiments of this disclosure will be described in detail below with reference to the drawings. At least some of the embodiments described below may be combined in any way.

[0020] [Overall configuration of the work vehicle] Figure 1 is a side view of a work vehicle according to the first embodiment. Figure 2 is a top view of the work vehicle shown in Figure 1. Figure 3 is an explanatory diagram of the support mechanism at the right front of the work vehicle according to the first embodiment. The work vehicle 10 shown in Figures 1 to 3 is a vehicle capable of traveling on uneven road surfaces (rough terrain). The work vehicle 10 shown in Figures 1 to 3 is the work vehicle 10 according to the first embodiment and is also referred to as work vehicle 10A. In the following description, when simply referred to as "work vehicle 10", it refers to a configuration common to work vehicle 10A and work vehicles 10B and 10C according to other embodiments described later. In this embodiment, a work vehicle 10 capable of traveling on rough terrain is exemplified, but the work vehicle of this disclosure may be a vehicle capable of traveling only on leveled (smooth) road surfaces.

[0021] In the following explanation, the direction of arrow FW shown in the diagram is the "front" of the work vehicle 10, which is the direction in which the work vehicle 10 is moving straight. The direction of arrow BK is the "rear" of the work vehicle 10, which is opposite to the direction in which it is moving straight. The direction of arrow RH is the "right" of the work vehicle 10 when it is moving straight, and the direction of arrow LH is the "left" of the work vehicle 10 when it is moving straight. The direction of arrow DW is the "down" of the work vehicle 10, which is the side facing the road surface, and the direction of arrow UP is the "up" of the work vehicle 10, which is the side away from the road surface.

[0022] The work vehicle 10 comprises a vehicle body 11, a plurality of wheels 12, a plurality of support mechanisms 13, and a control device 17. The work vehicle 10 in this embodiment has four wheels 12 and the same number (four) of support mechanisms 13 as the wheels 12. The wheels 12 are running gear that support the vehicle body 11 so that it can move. The wheels 12 are located at the front and rear on both the left and right sides of the vehicle body 11. That is, the work vehicle 10 has four wheels 12: left front, right front, left rear, and right rear. The support mechanisms 13 connect the vehicle body 11 and the wheels 12.

[0023] The vehicle body 11 has a frame 21. The vehicle body 11 has a cargo bed 22 on top of the frame 21 on which cargo can be loaded. The cargo bed 22 has a flat loading surface 221 on its upper surface. The loading surface 221 has a substantially rectangular shape in plan view (see Figure 2). The loading surface 221 extends in the left-right and front-rear directions. The loading surface 221 includes a flat section 222 which will be described later. The cargo to be placed on the loading surface 221 is, for example, agricultural equipment, fertilizers, chemicals and other agricultural materials, harvested produce and harvesting baskets, or pallets on which these are placed. In the following description, the cargo exemplified here will be referred to as "cargo, etc." In the work vehicle 10 of this disclosure, the objects to be placed on the cargo bed 22 are not limited to cargo, etc., but also include work equipment (work equipment 90 which will be described later, see Figure 11), and tanks (tanks 100 which will be described later, see Figure 14), etc.

[0024] The support mechanisms 13 are located on the left front, right front, left rear, and right rear of the vehicle body 11. The support mechanisms 13 are attached to the vehicle body 11 (part of the frame 21) and support the wheels 12 so that their position can be changed relative to the vehicle body 11. The support mechanisms 13 have an articulated link mechanism 30 as an actuating part that can change the position of the wheels 12. The wheels 12 are attached to the articulated link mechanism 30. The support mechanisms 13 have an actuator 14 that drives the articulated link mechanism 30.

[0025] The actuator 14 operates the bending link mechanism 30 and changes the orientation of the bending link mechanism 30. The actuator 14 has a first hydraulic cylinder 36 and a second hydraulic cylinder 37. The specific configurations of the support mechanism 13 and the actuator 14 will be described later.

[0026] The work vehicle 10 has multiple hydraulic motors 15. The hydraulic motors 15 are located at the ends of the articulated link mechanism 30 together with the wheels 12. The hydraulic motors 15 are driving actuators that rotate the wheels 12.

[0027] Wheel 12 is a drive wheel rotated by a hydraulic motor 15. The work vehicle 10 moves as a result of the rotation of wheel 12. The work vehicle 10 has a number of auxiliary wheels 16. The auxiliary wheels 16 are attached in the middle of the articulated link mechanism 30. The auxiliary wheels 16 are attached to the connecting part (joint) between the first link 31 and the second link 32, which constitute the articulated link mechanism 30, as described later. The auxiliary wheels 16 are driven wheels that can rotate freely.

[0028] The work vehicle 10 includes a hydraulic unit 41, a battery 42, and an engine 43. The hydraulic unit 41 supplies hydraulic fluid to a hydraulic motor 15, a first hydraulic cylinder 36, a second hydraulic cylinder 37, and a slewing hydraulic cylinder 38, which will be described later. The hydraulic unit 41 includes a hydraulic pump 44 driven by the engine 43, a plurality of hydraulic control valves 45, and a hydraulic fluid tank 46. The work vehicle 10 also includes a fuel tank 49 for storing fuel supplied to the engine 43.

[0029] A hydraulic control valve 45 is connected to each of the hydraulic motor 15 and hydraulic cylinders 36, 37, and 38. The hydraulic control valve 45 is a solenoid valve and has the function of supplying, stopping, and adjusting the supply flow rate of hydraulic fluid from the hydraulic pump 44.

[0030] The control device 17 adjusts the supply state (supply amount) of hydraulic fluid from the hydraulic unit 41 by controlling the hydraulic control valve 45. In other words, the control device 17 controls the operation of the hydraulic motor 15 and the hydraulic cylinders 36, 37, and 38.

[0031] The hydraulic unit 41, battery 42, and control device 17 are mounted on the vehicle body 11 (frame 21), and in this embodiment (see Figure 1), are located under the cargo bed 22. The battery 42 supplies power to the control device 17, the hydraulic unit 41, and several sensors, which will be described later. The battery 42 also supplies power to the work equipment 90 (see Figure 11), which will be described later.

[0032] [Support mechanism 13 and actuator 14] As shown in Figures 1 and 2, the left front support mechanism 13 and the right front support mechanism 13 are "front support mechanisms 13f" located at the front of the vehicle body 11. The left rear support mechanism 13 and the right rear support mechanism 13 are "rear support mechanisms 13b" located at the rear of the vehicle body 11. Although the mounting orientation of the front support mechanisms 13f and rear support mechanisms 13b differs on the left and right sides of the work vehicle 10, their configuration is the same. The front support mechanisms 13f and rear support mechanisms 13b are collectively referred to as "support mechanisms 13" and will be described accordingly.

[0033] The support mechanism 13 supports the wheels 12 so that they can be individually raised and lowered relative to the vehicle body 11. For this purpose, the support mechanism 13 has an articulated link mechanism 30. As shown in Figure 3, the articulated link mechanism 30 has a first link 31 and a second link 32. The first link 31 and the second link 32 are both straight members. A fixing bracket 23 is fixed to a part of the frame 21 of the vehicle body 11. One of the first ends 311 on the upper side of the first link 31 is supported by the fixing bracket 23 so that it can swing around a first horizontal axis X1 in the left-right direction.

[0034] One first end 321 of the second link 32 is supported by the other second end 312, which is below the first link 31, so as to be able to swing around the second horizontal axis X2 in the left-right direction. A support bracket 33 is attached to the other second end 322, which is the tip end of the second link 32. The wheel 12 is supported by the support bracket 33.

[0035] A pair of actuators 14 is provided on a single articulated link mechanism 30 having a first link 31 and a second link 32. The pair of actuators 14 has a first hydraulic cylinder 36 and a second hydraulic cylinder 37. The first hydraulic cylinder 36 extends and retracts, causing the first link 31 to oscillate around a first horizontal axis X1. The first hydraulic cylinder 36 changes the oscillating posture of the first link 31 relative to the vehicle body 11. The second hydraulic cylinder 37 extends and retracts, causing the second link 32 to oscillate around a second horizontal axis X2. The second hydraulic cylinder 37 changes the oscillating posture of the second link 32 relative to the first link 31.

[0036] The hydraulic control valve 45 connected to the first hydraulic cylinder 36 and the hydraulic control valve 45 connected to the second hydraulic cylinder 37 are separate valves (see Figure 7), and the first hydraulic cylinder 36 and the second hydraulic cylinder 37 extend and retract independently. The bending link mechanism 30 bends and extends due to the extension and retraction of the first hydraulic cylinder 36 and the second hydraulic cylinder 37.

[0037] In Figure 3, for example, when the first hydraulic cylinder 36 extends and retracts while the second hydraulic cylinder 37 is stopped, the first link 31, the second link 32, and the wheel 12 swing together around the first transverse axis X1 while maintaining a constant relative position. When the second hydraulic cylinder 37 extends and retracts while the first hydraulic cylinder 36 is stopped, the second link 32 and the wheel 12 swing together around the second transverse axis X2 while maintaining a constant posture of the first link 31 relative to the vehicle body 11.

[0038] A support bracket 33 that supports the wheel 12 is attached to the second link 32. A hydraulic motor 15 is mounted on the support bracket 33. The support bracket 33 is attached to the other end of the second link 32 so as to be able to swing around the vertical axis Y in the vertical direction. The work vehicle 10 has a swivel hydraulic cylinder 38 (hereinafter referred to as the swivel cylinder 38) for changing the rolling direction of the wheel 12. The swivel cylinder 38 is attached between a part of the second link 32 and the support bracket 33. When the swivel cylinder 38 extends and retracts, the support bracket 33 and the wheel 12 swing around the vertical axis Y. The movement of the swivel cylinder 38 changes the direction of travel of the work vehicle 10.

[0039] The work vehicle 10 of this embodiment has four support mechanisms 13, and each support mechanism 13 is equipped with a pair of actuators 14. The pair of actuators 14 provided on one support mechanism 13 and the other pair of actuators 14 provided on another support mechanism 13 are separate actuators, and each actuator 14 operates independently. As a result, the four wheels 12 can be raised and lowered individually relative to the vehicle body 11. Moreover, it is possible to make the positions of the four wheels 12 relative to the vehicle body 11 different. The support mechanism 13 can change the distance between the ground contact surface of each wheel 12 and the vehicle body 11, especially the vertical distance. The "distance" referred to here is the vertical distance (distance L shown in Figure 1) between the lower surface (ground contact surface) of the wheel 12 and the mounting surface 221 (upper end of the cargo bed 22) of the vehicle body 11.

[0040] (Conveyor equipment and turntables) As shown in Figure 2, the work vehicle 10 of this disclosure further comprises a conveyor device 50 and a turntable 60 in the vehicle body 11. The conveyor device 50 and the turntable 60 are provided on the loading platform 22.

[0041] The conveyor device 50 is a device for transporting goods placed on the loading platform 22. The turntable 60 is a device for changing the orientation of goods placed on the loading platform 22.

[0042] The conveyor system 50 includes a first conveyor 51 and a second conveyor 52. The first conveyor 51 and the second conveyor 52 have the same dimensions in the width direction. The first conveyor 51 comprises a pair of drive rollers 53, 53 arranged parallel to each other and an endless belt 54 wound around the drive rollers 53, 53. The first conveyor 51 transports luggage and other items placed on the endless belt 54 by rotating the endless belt 54 with the drive rollers 53. In plan view, the first conveyor 51 is a rectangle with a short side and a long side. The second conveyor 52 comprises a pair of drive rollers 55, 55 arranged parallel to each other and an endless belt 56 wound around the drive rollers 55, 55. The second conveyor 52 transports luggage and other items placed on the endless belt 56 by rotating the endless belt 56 with the drive rollers 55. In plan view, the second conveyor 52 is a rectangle with a short side and a long side. As described above, the first conveyor 51 and the second conveyor 52 in this embodiment are composed of belt conveyors. However, in the work vehicle 10 of this disclosure, the conveyor device 50 (first conveyor 51 and second conveyor 52) may be a conveyor device other than a belt conveyor (for example, a roller conveyor).

[0043] The turntable 60 has a disc-shaped table portion 61 and a shaft portion 62 that rotatably supports the table portion 61. The shaft portion 62 extends in the vertical direction and is provided coaxially with the axis of the table portion 61. The shaft portion 62 is rotationally driven around its axis by a motor 63 (see Figure 7), which will be described later. The turntable 60 rotates around the axis of the shaft portion 62.

[0044] The shaft portion 62 is supported by an actuator 64 (see Figure 7), which will be described later, so that it can reciprocate in the axial direction. Therefore, in the work vehicle 10 of this disclosure, the turntable 60 is configured to be displaceable in the vertical direction.

[0045] The first conveyor 51 constitutes a part of the turntable 60. In a plan view, the first conveyor 51 is located radially inward from the outer edge of the turntable 60. In the first conveyor 51, the endless belt 54 constitutes a conveying surface that is approximately the same height as the surface of the table portion 61. As a result, the first conveyor 51 can convey luggage and other items placed on the turntable 60.

[0046] The second conveyor 52 forms part of the loading platform 22. In a plan view, the second conveyor 52 is located radially outward from the outer edge of the turntable 60. In the second conveyor 52, the endless belt 56 forms a conveying surface that is approximately the same height as the mounting surface 221 of the loading platform 22. As a result, the second conveyor 52 can transport goods and the like that are placed on the loading platform 22 radially outward from the turntable 60.

[0047] (Regarding the operation of the conveyor system and turntable) Figure 4 is an explanatory diagram illustrating the transfer of goods, etc., by a work vehicle according to the first embodiment. As shown in Figure 4, in the work vehicle 10A according to the first embodiment, the first conveyor 51 can transport goods, etc., placed on the turntable 60 radially outward from the turntable 60. The second conveyor 52 can take over the goods, etc., that have been transported radially outward from the turntable 60 and further transport them to the outside of the loading platform 22 (for example, the loading platform of a truck, etc.).

[0048] Furthermore, in the work vehicle 10A, the second conveyor 52 can transport goods that have been transferred onto the loading platform 22 from the outside of the loading platform 22 (for example, the loading platform of a truck) towards the turntable 60. The first conveyor 51 can take over the goods transported by the second conveyor 52 and transport them further to the center of the loading platform 22 (on the turntable 60).

[0049] Furthermore, the work vehicle 10A can adjust the height of the loading platform 22 and the height of the turntable 60 by operating the articulating link mechanism 30 and / or the actuator 64, which will be described later. Therefore, the work vehicle 10A can adjust the height of the loading platform 22 and the turntable 60 to match the height of the destination to which the cargo will be transferred (for example, the loading platform of a truck). With a work vehicle 10A configured in this way, the transfer of cargo from the loading platform 22 to the destination (for example, the loading platform of a truck) can be performed more smoothly, and the labor required for the transfer of cargo can be reduced. In other words, with a work vehicle 10A configured in this way, the labor required to manually push or pull cargo when loading or unloading cargo from the loading platform 22 to the loading platform of a truck can be reduced.

[0050] As described above, the work vehicle 10A of this embodiment can efficiently perform the task of transferring goods from the loading platform 22 to an external location (for example, the loading platform of a truck), and the task of transferring goods from an external location to the loading platform 22, by using the first conveyor 51 and the second conveyor 52. Therefore, the work vehicle 10A of this embodiment can reduce the labor required for the transfer of goods.

[0051] Figure 5 is a plan view showing the rotation of the turntable of the work vehicle shown in Figure 1. Figure 6 is an explanatory diagram of the process of changing the direction of cargo, etc., by the work vehicle according to the first embodiment. As shown in Figures 2 and 5, in the work vehicle 10A according to the first embodiment, the first conveyor 51 is provided on the turntable 60.

[0052] As shown in Figures 2, 5, and 6, the work vehicle 10A with this configuration can change the orientation of loads and other items placed on the turntable 60 (first conveyor 51) by rotating the turntable 60 (table section 61) around the shaft 62. Furthermore, the work vehicle 10A with this configuration can change the transport direction of the first conveyor 51 by rotating the turntable 60 (table section 61) around the shaft 62. The work vehicle 10A can transport loads and other items on the turntable 60 in any direction, including the left-right and front-rear directions of the vehicle body 11, using the first conveyor 51.

[0053] With this configuration, when transferring cargo, the work vehicle 10A can perform the transfer operation without changing the orientation of the vehicle body 11 by rotating the turntable 60 (first conveyor 51) so that the first conveyor 51 faces the stopping position (transfer direction) of the truck or other vehicle. Therefore, the work vehicle 10A can reduce the labor required for loading and unloading cargo.

[0054] As shown in Figures 2 and 5, in the work vehicle 10 of this disclosure, the first conveyor 51 is arranged point-symmetrically with respect to the rotation center P of the turntable 60. In a work vehicle 10 with this configuration, the conveying direction of the first conveyor 51 can be aligned with the direction in which goods are loaded and unloaded by rotating the turntable 60. This improves the work efficiency of loading and unloading goods. In addition, in the work vehicle 10 of this disclosure, the first conveyor 51 may be divided into multiple sections in the width direction (axial direction of the drive roller 53). In this case, the multiple first conveyors 51 arranged in the width direction may be spaced apart in the width direction.

[0055] Furthermore, in the work vehicle 10 of this disclosure, the first conveyor 51 is a belt conveyor and is provided on a turntable 60. The first conveyor 51 is positioned within the rotation center P of the turntable 60. In a work vehicle 10 with this configuration, the conveying direction of the first conveyor 51, which is a belt conveyor, can be aligned with the direction in which goods are loaded and unloaded by rotating the turntable 60. As a result, the work vehicle 10 can improve the work efficiency of loading and unloading goods.

[0056] (Power outlet) As shown in Figures 2 and 5, the work vehicle 10 of this embodiment is equipped with a power outlet 70 on the cargo bed 22. The power outlet 70 is a part that enables the supply of power to a power-operated device when the device is installed on the cargo bed 22. In the work vehicle 10 of this embodiment, the power outlet 70 is composed of a so-called power supply rail. The power outlet 70 is electrically connected to the power supply source (battery 42 shown in Figure 1) of the work vehicle 10. Therefore, the power outlet 70 can supply power to a device electrically connected to the power outlet 70. The power outlet 70 is used together with a plug that can be connected to the power outlet 70 (see plug 71 shown in Figure 12). The plug is configured to be connectable to the power outlet 70 at any position along its length. The plug is attached to the power cable (see power cable 96 shown in Figure 12) of the device installed on the cargo bed 22. The device is powered by connecting the plug to the power outlet 70.

[0057] In a work vehicle 10 having a first conveyor 51 arranged on a turntable 60, the power outlets 70 are located on one and the other side of the first conveyor 51 in the width direction (axial direction of the drive roller 53). In a plan view, the power outlets 70 are arranged parallel to the long side of the rectangular first conveyor 51. The power outlets 70 are arranged on the turntable 60 in accordance with the arrangement of the long side of the first conveyor 51. In other words, the work vehicle 10 has power outlets 70 on both sides of the first conveyor 51 in the width direction. When placing an electrically operated device (see work device 90 shown in Figure 11) on the turntable 60, if the arrangement of the power outlets 70 and the configuration of the power cable of the device (power cable outlet position, length, etc.) are incompatible, the device may not be able to be installed. Since the work vehicle 10 is equipped with power outlets 70 made of power supply rails, the device (the plug) can be connected at any position within the length range of the power outlets 70. Furthermore, since the work vehicle 10 has power outlets 70 on both sides in the width direction of the first conveyor 51, compatibility issues between the arrangement of the power outlets 70 and the configuration of the power cables are less likely to occur.

[0058] As described above, in the work vehicle 10 of this embodiment, the first conveyor 51 is arranged on the turntable 60, and the power outlet 70 is located outside the first conveyor 51 on one side and the other side in the width direction of the first conveyor 51. With this configuration, the work vehicle 10 can reliably connect the work equipment arranged on the turntable 60 to the power outlet 70 by providing power outlets 70 on both sides in the width direction of the first conveyor 51.

[0059] (Mounting part) As shown in Figures 2 and 5, the work vehicle 10 of this disclosure includes a mounting portion 80. The mounting portion 80 is a part for attaching a device to the loading platform 22 and is provided on the loading platform 22. The mounting portion 80 has the function of positioning the device to be attached to the loading platform 22 relative to the loading platform 22 and the turntable 60. The "attachment" referred to herein includes fixing the device to the loading platform 22 so that it cannot be displaced, installing the device on the loading platform 22 so that it can be displaced, positioning and placing the device on the loading platform 22, etc. The form of the mounting portion 80 may include, for example, bolt holes and elongated holes through which bolts can be inserted, fittings for which hooks, etc. can be attached, recesses into which protrusions formed on the device can be fitted, etc.

[0060] In the work vehicle 10 of this embodiment, the mounting portion 80 includes a first mounting portion 81, a second mounting portion 82, and a third mounting portion 83. The first mounting portion 81 is a mounting portion 80 provided on the turntable 60. Devices installed on the turntable 60 using only the first mounting portion 81 can rotate together with the turntable 60. For this reason, the first mounting portion 81 is suitable for use when installing devices on the turntable 60. The second mounting portion 82 is a mounting portion 80 provided on the loading platform 22 radially outward from the turntable 60, and is arranged in pairs on the left and right sides of the turntable 60. The third mounting portion 83 is a mounting portion 80 provided on the loading platform 22 radially outward from the turntable 60, and is arranged in pairs on the left and right sides of the turntable 60. The second mounting portion 82 and the third mounting portion 83 are suitable for use when installing large devices that straddle the turntable 60 on the loading platform 22.

[0061] As described above, in the work vehicle 10 of this embodiment, the turntable 60 is equipped with a first mounting portion 81 to which a work device can be attached. Therefore, the work vehicle 10 can easily attach a work device to the turntable 60 by means of the first mounting portion 81. In addition, the work vehicle 10 can accurately position the work device 90 on the turntable 60 by means of the first mounting portion 81. With this configuration, the work vehicle 10A can attach and detach a work device from the turntable 60. When a work device is installed on the turntable 60, the work vehicle 10A can perform work using the work device, and when a work device is not installed on the turntable 60, it can transport goods, etc., using the first conveyor 51 and the turntable 60, etc.

[0062] As shown in Figure 2, the work vehicle 10 of this embodiment is equipped with a first mounting section 81, a power outlet 70, and a first conveyor 51 on a turntable 60. In the embodiment of the work vehicle 10 shown in Figure 2, the power outlet 70 located on the left side of the vehicle body 11 and the two first mounting sections 81 located at the front and rear on the left side of the vehicle body 11 are arranged on the same straight line. Also, in the embodiment shown in Figure 2, the power outlet 70 located on the right side of the vehicle body 11 and the two first mounting sections 81 located at the front and rear on the right side of the vehicle body 11 are arranged on the same straight line. Furthermore, in the embodiment shown in Figure 2, the power outlet 70 located on the left side of the vehicle body 11, the two first mounting parts 81 located at the front and rear on the left side of the vehicle body 11, and the two second mounting parts 82 located at the front and rear on the left side of the vehicle body 11 are arranged on the same straight line, and the power outlet 70 located on the right side of the vehicle body 11, the two first mounting parts 81 located at the front and rear on the right side of the vehicle body 11, and the two second mounting parts 82 located at the front and rear on the right side of the vehicle body 11 are arranged on the same straight line. Also, in the embodiment shown in Figure 5, the power outlet 70 located on the front side of the vehicle body 11 and the two first mounting parts 81 located on the left and right sides of the front side of the vehicle body 11 are arranged on the same straight line. Also, in the embodiment shown in Figure 5, the power outlet 70 located on the rear side of the vehicle body 11 and the two first mounting parts 81 located on the left and right sides of the rear side of the vehicle body 11 are arranged on the same straight line. Furthermore, in the embodiments shown in Figures 2 and 5, the two third mounting portions 83 located at the front and rear on the left side of the vehicle body 11 are arranged on the same straight line, and the two third mounting portions 83 located at the front and rear on the right front of the vehicle body 11 are also arranged on the same straight line.

[0063] (flat area) As shown in Figures 2 and 5, the loading platform 22 has a flat portion 222 formed radially outward from the turntable 60. The flat portion 222 is part of the mounting surface 221. In the work vehicle 10 of this embodiment, the flat portion 222 is a flat part of the loading platform 22 where the conveyor device 50 and the mounting portion 80 are not located. Therefore, the work vehicle 10 can place cargo on the flat portion 222 radially outward from the turntable 60. Thus, the work vehicle 10 can separate and transport cargo that needs to be turned using the turntable 60 from other cargo. The flat portion 222 does not need to have a shape that has any convex portions that protrude upward, and may also have a shape that includes concave portions. With such a configuration, when a device installed on the turntable 60 is rotated, contact between the device and the flat portion 222 can be avoided. The flat portion 222 may have convex portions that do not come into contact with the device when the device installed on the turntable 60 is rotated.

[0064] [Sensor] Figure 7 is a control block diagram of the work vehicle. As shown in Figure 7, the work vehicle 10 is equipped with multiple sensors. The second hydraulic cylinder 37 is connected to a head-side pressure sensor S1 and a rod-side pressure sensor S2. The head-side pressure sensor S1 detects the internal pressure of the head-side oil chamber of the second hydraulic cylinder 37. The rod-side pressure sensor S2 detects the internal pressure of the rod-side oil chamber of the second hydraulic cylinder 37. The control device 17 acquires the detection signals from sensors S1 and S2.

[0065] A stroke sensor S3 for detecting the amount of extension and retraction is provided in each of the first hydraulic cylinder 36 and the second hydraulic cylinder 37. The amount of extension and retraction of each of the first hydraulic cylinder 36 and the second hydraulic cylinder 37 is related to the swing positions of the first link 31 and the second link 32, respectively. Therefore, the detected value of the stroke sensor S3 is correlated with the swing positions of the first link 31 and the second link 32, respectively. As a result, the position of the wheel 12 relative to the vehicle body 11 can be uniquely detected by the stroke sensor S3. The control device 17 acquires the detection signal from the stroke sensor S3 and detects the position of the wheel 12 (detection by calculation).

[0066] The vehicle body 11 is equipped with a tilt sensor S4 that detects the tilt state of the vehicle body 11. The tilt sensor S4 is configured using an inertial measurement unit (IMU) with a well-known configuration. The IMU in this embodiment has a three-axis acceleration sensor and a gyro sensor, and detects the change in attitude state of the vehicle body 11, specifically the tilt in the longitudinal and lateral directions. The control device 17 acquires the detection signal from the tilt sensor S4.

[0067] The wheel 12 is equipped with a rotation sensor S5 located near it to detect the rotational speed of the wheel 12. The control device 17 acquires the detection signal from the rotation sensor S5. Based on the value detected by the rotation sensor S5, the control device 17 controls the supply of hydraulic fluid to the hydraulic motor 15 so that the rotational speed of the wheel 12 reaches a target value.

[0068] The work vehicle 10 has a pressure sensor S6 that detects the pressure of the hydraulic fluid supplied to the hydraulic motor 15. The control device 17 acquires the detection signal from the pressure sensor S6. Based on the hydraulic fluid pressure detected by the pressure sensor S6, the control device 17 controls the supply (pressure) of hydraulic fluid to the hydraulic motor 15 so that the driving torque of the wheels 12 reaches a target value. The four slewing cylinders 38 are each equipped with a stroke sensor S7 that can detect the extension and retraction amount. The control device 17 acquires the detection signal from the stroke sensor S7. The work vehicle's direction of travel is controlled as a result.

[0069] As shown in Figure 7, the turntable 60 includes a motor 63 and an actuator 64. The motor 63 is an electric motor, and its motor shaft (not shown) is coaxially connected to the shaft portion 62 (see Figure 2). In response to the operation of the operating lever 48, the motor shaft of the motor 63 rotates clockwise or counterclockwise, driving the shaft portion 62 (see Figure 2) to rotate. The turntable 60 is rotated by the operation of the motor 63.

[0070] The actuator 64 is a hydraulic cylinder that can extend and retract in the axial direction of the shaft 62 (see Figure 2) and is connected to the shaft 62. The actuator 64 reciprocates the shaft 62 (see Figure 2) in the axial direction. The actuator 64 extends and retracts in response to the operation of the operating lever 48, with the supply of hydraulic fluid from the hydraulic unit 41 being adjusted by the hydraulic control valve 45. The turntable 60 is raised and lowered by the operation of the actuator 64. The actuator 64 may also be an electric actuator that is operated by electricity. In addition, the work vehicle 10 may be equipped with separate operating parts for operating the motor 63 and the actuator 64.

[0071] [Control device] Figure 8 is an explanatory diagram of attitude control in a work vehicle. As shown in Figures 1 and 7, the work vehicle 10 is equipped with a control device 17. As shown in Figure 7, the control device 17 has an ECU 170 (Electronic Control Unit) which functions as the main control unit that controls the operation of the work vehicle 10. The ECU 170 has a microcomputer and performs various controls according to a control program. The ECU 170 has a non-volatile memory that stores programs corresponding to the functional units that perform various controls, and a CPU that executes those programs. The functions (controls) of each functional unit are realized when the program is executed by the CPU.

[0072] The ECU170 has a driving control unit 171 and a posture control unit 172 as its functional units. When the vehicle is traveling with all four wheels 12 in contact with the ground, the driving control unit 171 controls the operation of the hydraulic motor 15 for each of the four wheels 12 so that the rotational speed of the wheel 12 detected by the rotation sensor S5 becomes the target speed, and the drive torque detected by the pressure sensor S6 becomes the target value. The posture control unit 172 performs horizontal control and center of gravity position control, which will be described below.

[0073] (Changeover switch) The work vehicle 10 of this disclosure further comprises a changeover switch 47. The changeover switch 47 is a switch for selecting the control mode of the work vehicle 10. The changeover switch 47 can select either of the control modes described below ("horizontal control" and "inclined mode").

[0074] (Horizontal control) The attitude control unit 172 performs horizontal control based on the detection signal from the tilt sensor S4 when the work vehicle 10 is moving. Horizontal control is the control of the support mechanism 13 so that the vehicle body 11 becomes horizontal, in other words, so that the mounting surface 221 of the cargo bed 22 becomes horizontal. Based on the detection signal from the tilt sensor S4 and the detection signal from the stroke sensor S3, the attitude control unit 172 determines the tilt angle in the longitudinal direction and the tilt angle in the lateral direction from a reference position where the vehicle body 11 (cargo bed 22) is in a horizontal position. The attitude control unit 172 controls the operation of the four first hydraulic cylinders 36 and the four second hydraulic cylinders 37 so that these tilt angles become values ​​corresponding to a horizontal position (i.e., the tilt angle is zero).

[0075] For example, when the work vehicle 10 travels on a running surface that slopes downward to the left, the support mechanisms 13 located on the front and rear left sides of the vehicle body 11 are positioned on the lower side of the slope, and the support mechanisms 13 located on the front and rear right sides of the vehicle body 11 are positioned on the upper side of the slope. In this case, the operation of the four support mechanisms 13 is controlled so that the distance between the contact surface of the wheels 12 located on the front and rear left sides of the vehicle body 11 and the vehicle body 11 is greater than the distance between the contact surface of the wheels 12 located on the front and rear right sides of the vehicle body 11 and the vehicle body 11. Also, for example, when the work vehicle 10 travels on a running surface that slopes downward to the front, the support mechanisms 13 located on the left and right sides of the front of the vehicle body 11 are positioned on the front side of the slope, and the support mechanisms 13 located on the left and right sides of the rear of the vehicle body 11 are positioned on the upper side of the slope. In this case, the operation of the four support mechanisms 13 is controlled so that the distance between the contact surfaces of the wheels 12 located on the left and right sides of the front of the vehicle body 11 and the vehicle body 11 is greater than the distance between the contact surfaces of the wheels 12 located on the left and right sides of the rear of the vehicle body 11 and the vehicle body 11. In this way, the work vehicle 10 can control the horizontal position of the vehicle body 11 (cargo bed 22).

[0076] To further explain the horizontal control, the ECU 170 calculates the target operating amounts for the four first hydraulic cylinders 36 and the four second hydraulic cylinders 37 required to bring the cargo bed 22 into a horizontal position, based on the tilt posture (tilt angle) of the cargo bed 22 detected by the tilt sensor S4. The ECU 170 controls the operation of the four first hydraulic cylinders 36 and the four second hydraulic cylinders 37 so that the actual operating amount detected by the stroke sensor S3 becomes the target operating amount.

[0077] (Tilt mode) The work vehicle 10 of this disclosure has a selectable "inclination mode." The "inclination mode" is a mode suitable, for example, when performing unloading work from the loading platform 22. When the "inclination mode" is selected, the work vehicle 10 can change the angle between the loading surface 221 of the loading platform 22 and the driving surface to any desired angle. The work vehicle 10 of this disclosure is equipped with an operating lever 48. The operating lever 48 is a lever used by the operator to indicate the direction of travel when the work vehicle 10 is in motion. In the work vehicle 10 of this embodiment, when the "inclination mode" is selected, the operating lever 48 can be used to indicate the inclination angle of the loading platform 22. The work vehicle 10 may also be configured to have a separate dedicated operating lever used to indicate the inclination angle of the loading platform 22 when the "inclination mode" is selected.

[0078] When the "tilting mode" is selected, if the operator operates the operating lever 48, the control device 17 activates the support mechanisms 13 provided on the front, rear, left, and right sides of the vehicle body 11 according to the direction and amount of operation. As a result, the work vehicle 10 of this disclosure can tilt the mounting surface 221 to any angle.

[0079] Specifically, when unloading cargo from the work vehicle 10, selecting the "incline mode" allows the operator to incline the loading platform 22 so that the loading surface 221 slopes downwards towards the unloading destination. In this case, the operator can slide the cargo from the loading platform 22 to the unloading destination, making the movement of the cargo easier.

[0080] When the "tilt mode" is selected when the running surface of the wheels 12 is a horizontal plane, the tilt angle of the loading platform 22 can be changed so that the placement surface 221 tilts with respect to the running surface (horizontal plane) by operating the operation lever 48 by the operator.

[0081] As shown in the upper figure of FIG. 8, for example, when the running surface of the wheels 12 is a horizontal plane and unloading is performed from the left side of the loading platform 22, the distance La between the ground contact surface of the wheels 12 provided at the front and rear on the left side of the vehicle body 11 and the vehicle body 11 is smaller than the distance Lb between the ground contact surface of the wheels 12 provided at the front and rear on the right side of the vehicle body 11 and the vehicle body 11 (La < Lb), and the operations of the four support mechanisms 13 are controlled. Thereby, when the running surface is a horizontal plane, the work vehicle 10A can tilt the vehicle body 11 (loading platform 22) downward to the left. Here, the case where the vehicle body 11 is tilted in the left-right direction is illustrated, but the work vehicle 10 can also tilt the vehicle body 11 in the front-rear direction, and thereby, the tilt of the loading platform 22 can also be made to fall forward (or backward).

[0082] Further, when the "tilt mode" is selected in a state where the running surface of the wheels 12 is an inclined surface, the tilt angle of the loading platform 22 can be changed so that the placement surface 221 becomes horizontal by operating the operation lever 48 by the operator.

[0083] As shown in the lower figure of FIG. 8, for example, when the running surface of the wheels 12 is an inclined surface that slopes downward to the left, the distance La between the ground contact surface of the wheels 12 provided at the front and rear on the left side of the vehicle body 11 and the vehicle body 11 is made larger than the distance Lb between the ground contact surface of the wheels 12 provided at the front and rear on the right side of the vehicle body 11 and the vehicle body 11 (La > Lb), and the operations of the four support mechanisms 13 are controlled. Thereby, the work vehicle 10 can horizontally control the vehicle body 11 (loading platform 22) when the running surface is an inclined surface.

[0084] In other words, if the running surface of the wheels 12 is an inclined surface, the work vehicle 10 can operate the support mechanism 13 by operating the operating lever 48 to change the inclination of the mounting surface 221 to horizontal, and if the running surface of the wheels 12 is a horizontal plane, the work vehicle 10 can operate the support mechanism 13 by operating the operating lever 48 to change the inclination of the mounting surface 221 to an angle inclined with respect to the horizontal plane.

[0085] As described above, the work vehicle 10 of this disclosure comprises a vehicle body 11 having a cargo bed 22, a plurality of wheels 12 located at the front and rear on both the left and right sides of the vehicle body 11, and a support mechanism 13 that can change the distance between the contact surface of the wheels 12 and the vehicle body 11. In the work vehicle 10, the support mechanism 13 can change the inclination of the cargo bed 22 to horizontal when the running surface of the wheels 12 is an inclined surface, and can change the inclination of the cargo bed 22 to an angle inclined with respect to the horizontal plane when the running surface of the wheels 12 is a horizontal plane. With a work vehicle 10 having a vehicle body 11 capable of horizontally controlling the cargo bed 22, the cargo bed 22 can be tilted when the running surface is a horizontal plane. In this case, the cargo bed 22 can be tilted when transferring harvested goods from the cargo bed 22 to a truck or the like. This makes it possible to reduce the labor involved in transferring harvested goods from the work vehicle 10.

[0086] Furthermore, when the running surface of the wheels 12 is an inclined surface, the work vehicle 10 can travel while controlling the vehicle body 11 horizontally by operating the support mechanism 13, and can stop at a certain point while controlling the vehicle body 11 horizontally. Moreover, from this stopped state with horizontal control, the work vehicle 10 can tilt the loading surface 221 of the loading bed 22 with respect to the horizontal direction by operating the support mechanism 13 (first hydraulic cylinder 36 and second hydraulic cylinder 37). With this configuration, the work vehicle 10 can tilt the loading bed 22 as needed to unload harvested goods, even when the running surface of the wheels 12 is an inclined surface.

[0087] As described above, in the work vehicle 10 of this embodiment, the vehicle body 11 is equipped with a plurality of wheels 12 located at the front and rear on both the left and right sides of the vehicle body 11, and a support mechanism 13 that can change the distance L between the contact surface of the wheels 12 and the vehicle body 11, and the support mechanism 13 is capable of horizontally controlling the vehicle body 11. With a work vehicle 10 configured in this way, the support mechanism 13 can control the vehicle body 11 horizontally and hold the cargo bed 22 horizontally. Furthermore, with a work vehicle 10 configured in this way, when loading or unloading cargo onto the cargo bed 22, the posture of the cargo bed 22 can be adjusted by the support mechanism 13. Therefore, the work vehicle 10 of this embodiment can reduce the burden on workers when loading or unloading cargo.

[0088] (Center of gravity position control) The attitude control unit 172 determines the center of gravity position G of the vehicle body 11 based on the detection information of the tilt sensor S4 and the stroke sensor S3, and can perform center of gravity position control, which controls the operation of the support mechanism 13 so that the center of gravity position G is located in the center of the multiple (four) wheels 12 in a plan view.

[0089] Let's explain the center of gravity position control further. The tilt state of the vehicle body 11 is detected by the output of the tilt sensor S4. The attitude control unit 172 determines the tilt angle in the longitudinal direction and the tilt angle in the lateral direction from the horizontal position of the vehicle body 11 based on the detection signal from the tilt sensor S4. The state of the support mechanism 13 (angle of the first link 31 relative to the vehicle body 11, and angle of the second link 32 relative to the first link 31) is detected from the detection results of the extension and contraction amounts of the first hydraulic cylinder 36 and the second hydraulic cylinder 37, which are detected by multiple stroke sensors S3.

[0090] As a result, the attitude control unit 172 can calculate and obtain the overall attitude (tilted state) of the vehicle body 11 and the position of the center of gravity G of the vehicle body 11 in relation to the ground contact positions of the four wheels 12. The attitude control unit 172 operates the first hydraulic cylinder 36 and the second hydraulic cylinder 37 so that the center of gravity G obtained in this way becomes a target attitude where it is located in the center of the multiple (four) wheels 12 in a plan view.

[0091] As a variation of center of gravity position control, the attitude control unit 172 does not determine the center of gravity position of the vehicle body 11, but rather determines the ground pressure of multiple (four) wheels 12. This ground pressure is determined based on the detection signals of pressure sensors S1 and S2. In this case, the attitude control unit 172 controls the operation of the support mechanism 13 so that the ground pressure of the wheels 12 on the lower side of the incline is equal to the ground pressure of the running wheels 12 on the upper side of the incline.

[0092] Thus, center of gravity control is a control method that adjusts the pressure (force) supporting the vehicle body 11 so that the center of gravity of the vehicle body 11 converges to the target center of gravity, regardless of the road surface. With center of gravity position control, it becomes possible to generate driving force by making the wheels 12 conform to the uneven shape of the road surface.

[0093] The attitude control unit 172 performs horizontal control and center of gravity position control, thereby enabling the support mechanism 13 to operate so that the attitude of the loading platform 22 (mounting surface 221) becomes horizontal and so that all wheels 12 generate driving force in accordance with the uneven shape of the road surface. In the work vehicle 10 of this disclosure, the vehicle body 11 does not necessarily have a function to control the attitude of the loading platform 22.

[0094] As described above, the work vehicle 10,10A of this embodiment comprises a vehicle body 11 having a cargo bed 22 and capable of movement, a conveyor device 50 capable of sending out objects loaded on the cargo bed 22, and a turntable 60 provided on the cargo bed 22, to which a work device (for example, a work device 90 described later) can be attached and detached. With the work vehicle 10,10A configured in this way, when loading and unloading cargo etc. onto the cargo bed 22, the orientation of the cargo etc. can be changed by the turntable 60 provided on the cargo bed 22, and the cargo etc. can be moved by the conveyor device 50 provided on the turntable 60. Furthermore, with the work vehicle 10,10A configured in this way, when a work device is attached to the cargo bed 22, it can be used for work other than the transportation of cargo etc. Therefore, the work vehicle 10,10A of this embodiment can be used for the transportation of cargo etc. and other work.

[0095] Furthermore, the work vehicles 10 and 10A of this embodiment are further equipped with a power outlet 70 provided on the turntable 60 and to which the cables of the work device can be connected. With work vehicles 10 and 10A configured in this way, when a work device is mounted on the loading platform 22, power can be supplied to the work device via the power outlet 70. Therefore, the work vehicles 10 and 10A of this embodiment can be equipped with electrically powered work devices on the loading platform 22.

[0096] (Regarding variations of the vehicle itself) Figure 9 is a side view of a work vehicle (motorized) having a modified vehicle body. Figure 10 is a block diagram of the work vehicle (motorized). The work vehicle 10 of this disclosure may be configured to include a vehicle body 110 as shown in Figure 9 instead of the vehicle body 11 (see Figures 1 and 2) described above. In the following description, the work vehicle 10 equipped with the vehicle body 110 will also be referred to as work vehicle 10D. The vehicle body 110 shown in Figure 9 is a motorized motor equipped with an electric motor 141, and in this respect differs from the vehicle body 11, which is an engine-powered machine. The work vehicle 10D is a motorized machine. As shown in Figure 9, the work vehicle 10D differs from the engine-powered work vehicle 10A described above in that it is a motorized machine, but in other respects it is the same as the work vehicle 10A. Here, the differences in the configuration of the work vehicle 10D from that of the work vehicle 10A will be explained, and for the parts that are common to the work vehicle 10A, the same reference numerals will be used and only the necessary parts will be explained.

[0097] As shown in Figures 9 and 10, the vehicle body 110 is equipped with an electric motor 141 and a battery 142 for driving the electric motor 141. The battery 142 equipped in the electric vehicle body 110 has different specifications from the battery 42 (see Figure 1) equipped in the engine-powered vehicle body 11. As shown in Figure 10, the electric vehicle body 110 is further equipped with an inverter 143 that converts the electricity stored in the battery 142 into alternating current and outputs it, and a charger 144 for charging the battery 142. The battery 142 is electrically connected to the power outlet 70. The battery 142 has the function of supplying power to a device (work device 90, which will be described later) connected to the power outlet 70.

[0098] As shown in Figure 10, the electric motor 141 is connected to the hydraulic pump 44. The hydraulic pump 44 is driven by the electric motor 141 to supply hydraulic fluid to the hydraulic unit 41. Electricity stored in the battery 142 is supplied to the electric motor 141 via the inverter 143. In the work vehicle 10D, the hydraulic pump 44 is driven by the electric motor 141. The hydraulic pump 44 pumps up hydraulic fluid stored in the hydraulic fluid tank 46 and supplies it to the hydraulic unit 41 via the oil passage. In the work vehicle 10D, the configuration of the wheels 12 driven by the hydraulic unit 41, the support mechanism 13, and the actuator 14 is the same as in the work vehicle 10A.

[0099] (Second embodiment of the work vehicle) Figure 11 is a schematic perspective view showing a work vehicle according to the second embodiment. Figure 12 is an explanatory diagram showing the installation of the work device on the turntable. Figures 11 and 12 show a second embodiment of the work vehicle 10 of this disclosure. In the following description, the work vehicle 10 according to the second embodiment will also be referred to as work vehicle 10B. As shown in Figure 11, the work vehicle 10B according to the second embodiment differs from the work vehicle 10A according to the first embodiment described above in that it is equipped with a work device 90, but the other components are the same as those of work vehicle 10A. Here, we will explain the differences in the configuration of work vehicle 10B from that of work vehicle 10A, and will omit the explanation of the components that are the same as those of work vehicle 10A.

[0100] (Working equipment) As shown in Figures 11 and 12, the work vehicle 10B according to the second embodiment is equipped with a work device 90. In the work vehicle 10B, the work device 90 is mounted on the loading platform 22 using the first mounting portion 81. The work device 90 in this embodiment is part of the work vehicle 10B and is a specially made product for the work vehicle 10B. The work vehicle 10 of this disclosure may be configured to allow the installation of a work device other than the general-purpose (not specially made for the work vehicle 10) work device 90 on the turntable 60. In this case, the work device does not have to be part of the work vehicle 10. The work vehicle 10B can attach and detach the work device 90 from the turntable 60. When the work device 90 is installed on the turntable 60, the work vehicle 10B can perform work using the work device 90, and when the work device 90 is not installed on the turntable 60, it can transport goods, etc., using the first conveyor 51 and the turntable 60, etc.

[0101] The work device 90 installed on the work vehicle 10B is an electrically powered device. In this embodiment, the work device 90 is an electric backhoe 91. The backhoe 91 comprises a main body 92, a boom 93, an arm 94, and a bucket 95. As shown in Figure 12, the backhoe 91 further comprises a power cable 96 extending from the main body 92. A plug 71 is attached to the end of the power cable 96. The plug 71 can be connected to any position along the length of the power outlet 70. Power is supplied to the work device 90 by connecting the plug 71 to the power outlet 70.

[0102] The main body 92 is fixed to the turntable 60 by inserting bolts 97 through bolt holes and first mounting parts 81 formed in the main body 92, and screwing nuts 98 onto the bolts 97. As a result, the backhoe 91 is installed on the turntable 60. At this time, the power cable 96 is connected to the power outlet 70 by a plug 71. This makes it possible to operate the work device 90 (backhoe 91). In the work vehicle 10B, since the backhoe 91 can be rotated using the turntable 60, there is no need for the backhoe 91 itself to have a swivel function. In the work vehicle 10B, since the backhoe 91 is supplied with power from the battery 42 via the power outlet 70, there is no need for the backhoe 91 itself to have a power source (battery, etc.). As a result, the configuration of the work device 90 (backhoe 91) mounted on the work vehicle 10B can be simplified.

[0103] Figure 13 is an explanatory diagram of a modified example of the installation of the work device on the turntable. In the work vehicle 10 of this disclosure, the form of the connection portion with the power outlet 70 provided on the main body 92 is not limited to a plug 71. For example, as shown in Figure 13, the connection portion may be composed of a rail-shaped member 72 provided on the lower surface of the main body 92. The length of the rail-shaped member 72 is less than or equal to the length of the power outlet 70. In this case, when the main body 92 is positioned and placed on the turntable 60, the rail-shaped member 72 is fitted into the groove of the power outlet 70. With such a configuration, power can be supplied to the backhoe 91 via the rail-shaped member 72 and the power cable 96.

[0104] In this embodiment, a backhoe 91 is shown as an example of the work device 90, but the work device 90 provided on the work vehicle 10B of this disclosure may be, for example, a watering device, a pesticide or fertilizer spraying device. When a watering device is installed on the turntable 60 of the work vehicle 10B, the direction of watering to the trees can be easily changed by rotating the turntable 60 in an orchard or the like. Similarly, when a spraying device is installed on the turntable 60 of the work vehicle 10B, the direction of spraying pesticides and fertilizers to the trees can be easily changed by rotating the turntable 60 in an orchard or the like. Thus, the power outlet 70 can be used as a power source for the watering device and the spraying device. The work vehicle 10B of this disclosure can be fitted with various work devices 90 with different functions and can be widely applied to work other than the transportation of harvested products.

[0105] As described above, the work vehicle 10B of this embodiment includes a work device 90, which is powered by electricity supplied from the power outlet 70. Therefore, the work vehicle 10B can perform tasks other than transporting cargo, etc., using the work device 90 installed on the turntable 60. Since the work vehicle 10B can be supplied with electricity from the power outlet 70, there is no need to provide a drive source (engine, etc.) for the work device 90 itself. Furthermore, since the work vehicle 10B can rotate the work device 90 using the turntable 60, there is no need to provide a rotation mechanism for the work device 90 itself. This allows the work vehicle 10B to simplify the configuration of the work device 90. Note that the work device 90 provided in the work vehicle 10B of this disclosure is not limited to a device that operates on electricity, but may also be a hydraulic device, etc. In this case, the work device 90 may be configured to operate using hydraulic fluid supplied from a hydraulic unit 41 (see Figure 1).

[0106] (Third embodiment of the work vehicle) Figure 14 is a schematic perspective view showing a work vehicle according to the third embodiment. Figure 15 is an explanatory diagram of the method for installing the tank on the cargo bed. Figure 14 shows the third embodiment of the work vehicle 10 of this disclosure. In the following description, the work vehicle 10 according to the third embodiment will also be referred to as work vehicle 10C. As shown in Figure 14, the work vehicle 10C according to the third embodiment is equipped with a tank 100 installed on the cargo bed 22. The work vehicle 10C according to the third embodiment differs from the work vehicle 10B according to the second embodiment described above in that it is equipped with a tank 100 instead of a work device 90, but the other configurations are the same as those of work vehicle 10B. Here, we will explain the differences in configuration between work vehicle 10C and work vehicle 10B, and omit the explanation of the points that are the same as those of work vehicle 10B.

[0107] (tank) As shown in Figure 14, the work vehicle 10C according to the third embodiment includes a tank 100. The tank 100 is part of the work vehicle 10C. The tank 100 is not a device that operates using supplied electricity. The tank 100 is installed on the loading platform 22, straddling the turntable 60. As shown in Figure 15, in the work vehicle 10C, the tank 100 is mounted on the loading platform 22 using a third mounting portion 83.

[0108] The tank 100 is a container capable of storing, for example, water, pesticides, fertilizers, etc. The work vehicle 10C can be used to transport water, pesticides, fertilizers, etc., contained in the tank 100 in places including sloping ground such as orchards. The tank 100 is provided with a protrusion 101 that can be fitted into a third mounting portion 83. When the tank 100 is placed in a predetermined position on the loading platform 22, the protrusion 101 is fitted into the third mounting portion 83. The tank 100 is installed on the loading platform 22 by the protrusion 101 being fitted into the third mounting portion 83. The displacement of the tank 100 in the front, rear, left, and right directions on the loading platform 22 is restricted by the protrusion 101 being fitted into the third mounting portion 83. As a result, the tank 100 is positioned in a predetermined position on the loading platform 22. When attaching the tank 100 to the loading platform 22, the second mounting portion 82 may be used in addition to the third mounting portion 83, and the first mounting portion 81 may also be used. In this case, it is preferable that the tank 100 further has protrusions (not shown) that fit into the first mounting portion 81 and the second mounting portion 82. The tank 100 may be further fixed to the cargo bed 22 using fastening members such as bolts and nuts, with the protrusions 101 fitted into the third mounting portion 83. The tank 100 may also be attached using the third mounting portion 83 with fastening members such as ropes.

[0109] As shown in Figure 15, the work vehicle 10C first places the tank 100 on the raised turntable 60, adjusts the position of the tank 100 so that the convex portion 101 and the third mounting portion 83 are aligned, and then lowers the turntable 60 to install the tank 100 on the loading platform 22. The work vehicle 10C can easily install the tank 100 on the loading platform 22 using this installation method. Furthermore, in the work vehicle 10C, the tank 100 installed on the loading platform 22 can be easily removed by raising the turntable 60 to a state where it is lifted off the mounting surface 221. The tank 100 provided in the work vehicle 10C of this disclosure is not limited to a container for storing water, pesticides, fertilizers, etc., but may be, for example, a large harvest basket, a waste container, etc.

[0110] The embodiments described above are illustrative and not restrictive in all respects. The scope of the present invention is indicated by the claims rather than by the embodiments, and includes all modifications within the scope equivalent to the configurations described in the claims. [Explanation of Symbols]

[0111] 10, 10A, 10B, 10C, 10D Work vehicles 11 Vehicle body 12 wheels 13 Support mechanism 22 cargo bed 51. First conveyor (conveyor device) 60 Turntables 70 Power outlet 81 First mounting section (mounting section) 90 Work equipment 222 Flat area P (the center of rotation of the turntable) L distance

Claims

1. A vehicle body having a cargo bed and capable of movement, A conveyor device capable of sending out objects loaded on the aforementioned loading platform, A turntable is provided on the aforementioned loading platform, Equipped with, The aforementioned turntable is a work vehicle on which work equipment can be attached and detached.

2. The work vehicle according to claim 1, further comprising a power outlet provided on the turntable and to which the cable of the work device can be connected.

3. The aforementioned vehicle body is Multiple wheels located at the front and rear on both the left and right sides of the vehicle body, The vehicle comprises a support mechanism that can change the distance between the wheel's contact surface and the vehicle body, The support mechanism is capable of horizontally controlling the vehicle body, as described in claim 1 or claim 2.

4. The work vehicle according to claim 1 or claim 2, wherein the conveyor device is arranged point-symmetrically with respect to the rotation center of the turntable.

5. The conveyor device is a belt conveyor, The work vehicle according to claim 4, wherein the belt conveyor is positioned to include the rotation center of the turntable.

6. The conveyor device is placed on the turntable, The work vehicle according to claim 2, wherein the power outlet is located outside the conveyor device on one side and the other side in the width direction of the conveyor device.

7. Including the aforementioned work apparatus, The work vehicle according to claim 2, wherein the work device is operable by power supplied from the power outlet.

8. The work vehicle according to claim 1 or claim 2, wherein the turntable is provided with a mounting portion to which the work device can be attached.

9. The work vehicle according to claim 1 or claim 2, wherein the loading platform has a flat portion formed on the radially outer side of the turntable.

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