Work vehicle

Abstract

To provide a work vehicle capable of enhancing convenience.SOLUTION: A work vehicle comprises: a vehicle body; a work machine (backhoe) installed on the vehicle body; and an electric power supply (a battery 91 installed on the work machine) that is provided on the work machine and is capable of supplying electric power to the vehicle body.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a technology for a work vehicle to which a work implement can be attached. [Background technology]

[0002] BACKGROUND ART Technology for work vehicles to which work implements can be attached is well known, as described in Patent Document 1, for example.

[0003] Patent Document 1 discloses a work vehicle equipped with a liftable implement. Generally, such work vehicles are known to use electric power to travel and perform various tasks. For example, a work vehicle is known that consumes electric power from a battery installed in the vehicle body to operate a motor, which serves as a prime mover, to travel and perform various tasks.

[0004] However, in such work vehicles, the space for installing the battery is limited, so the battery capacity is easily insufficient, which means the battery needs to be charged frequently, resulting in a lack of convenience and leaving room for improvement. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2020-120604 Summary of the Invention [Problem to be solved by the invention]

[0006] One aspect of the present disclosure has been made in consideration of the above-described circumstances, and the problem it aims to solve is to provide a work vehicle that can improve convenience. [Means for solving the problem]

[0007] The problem to be solved by one embodiment of the present disclosure has been described above, and next, the means for solving this problem will be described.

[0008] A work vehicle according to one aspect of the present disclosure comprises a vehicle body, a work implement attached to the vehicle body, and a power supply device provided on the work implement and capable of supplying power to the vehicle body. According to one aspect of the present disclosure, it is possible to improve convenience. That is, since the vehicle body can use electric power from a power supply device provided in a work machine, the working time of the work vehicle can be increased. Furthermore, when the work machine is not in use, the power supply device can be charged with the work machine removed.

[0009] The power supply device according to one aspect of the present disclosure is capable of supplying electric power to a prime mover of the vehicle body. According to one aspect of the present disclosure, electric power from the power supply device can be used to power the prime mover of the work vehicle.

[0010] The work machine according to one aspect of the present disclosure is a backhoe, and the power supply device is disposed on a floor of the backhoe. According to one aspect of the present disclosure, the power supply device can be placed in a suitable location, specifically, in a location where the power supply device is less likely to come into contact with the ground or obstacles.

[0011] The work machine according to one aspect of the present disclosure is a mower, and the power supply device is disposed on a deck that covers a blade of the mower. According to one aspect of the present disclosure, the power supply device can be placed in a suitable location, specifically, in a location where the power supply device is less likely to come into contact with the ground or obstacles.

[0012] A work vehicle according to one aspect of the present disclosure further includes a power connection section that detachably connects the power supply device to the vehicle body. According to one aspect of the present disclosure, the power supply device can be easily attached and detached to and from the vehicle body.

[0013] The work machine according to one aspect of the present disclosure is a hydraulic device that operates using hydraulic pressure supplied through a hydraulic connection part that is detachably connected to the vehicle body, and the power connection part is arranged on the same side as the hydraulic connection part in the left-right direction. According to one aspect of the present disclosure, by arranging the hydraulic connection portion and the power connection portion on the same side, the work equipment can be easily attached. [Effects of the Invention]

[0014] According to one aspect of the present disclosure, convenience can be improved. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a side view showing the overall configuration of a tractor according to an embodiment of the present disclosure; [Figure 2] 1 is a perspective view showing the configuration of a backhoe, which is an example of a work machine. [Figure 3] FIG. 2 is a block diagram showing the configuration of a power supply system for a tractor. [Figure 4] FIG. 2 is a schematic plan view of the tractor showing how the work implement-mounted battery is connected to the vehicle body. [Figure 5] FIG. 10 is a block diagram showing another example of a power supply system for a tractor. [Figure 6] 1 is a perspective view showing the configuration of a brush cutter as an example of a work machine. DETAILED DESCRIPTION OF THE INVENTION

[0016] In the following description, the directions indicated by arrows U, D, F, B, L, and R in the figures are defined as upward, downward, forward, backward, leftward, and rightward, respectively.

[0017] A tractor 1 according to one embodiment of the present invention will be described below with reference to FIG.

[0018] The tractor 1 mainly comprises a machine frame 2, a motor 3, a transmission case 4, front wheels 5, rear wheels 6, a bonnet 7, a riding section 8, a steering wheel 9, a seat 10, and a front loader 11.

[0019] The vehicle frame 2 is a frame-shaped member formed by appropriately combining multiple plate materials. The vehicle frame 2 is arranged with its longitudinal direction facing the front-to-rear direction. A motor 3, which serves as a prime mover, is fixed to the rear of the vehicle frame 2. A transmission case 4 is fixed to the rear of the motor 3. The front of the vehicle frame 2 is supported by a pair of left and right front wheels 5 via a front axle mechanism (not shown). The rear of the transmission case 4 is supported by a pair of left and right rear wheels 6 via a rear axle mechanism (not shown). The motor 3 is covered by a hood 7.

[0020] The power of the motor 3 is changed in speed by a transmission (not shown) housed in a transmission case 4, and then can be transmitted to the front wheels 5 via the front axle mechanism, and can be transmitted to the rear wheels 6 via the rear axle mechanism. The front wheels 5 and rear wheels 6 are driven to rotate by the power of the motor 3, allowing the tractor 1 to travel.

[0021] A riding section 8 for the driver to ride on is provided behind the motor 3. A steering wheel 9 for adjusting the turning angle of the front wheels 5 and various operating tools are arranged in front of the riding section 8. A seat 10 for the driver to sit on is arranged approximately in the center of the riding section 8.

[0022] A front loader 11, which is an example of a work machine, is attached to the front of the tractor 1. The front loader 11 includes a boom 12, a bucket 13, a boom cylinder 14, a bucket cylinder 15, and the like.

[0023] The boom 12 is disposed so as to extend downward and forward. The bucket 13 is detachably connected to the front end of the boom 12. The boom 12 can be rotated relative to the vehicle body by extending and retracting a boom cylinder 14. The bucket 13 can be rotated relative to the boom 12 by extending and retracting a bucket cylinder 15. In this way, work such as transporting earth and sand can be performed by rotating the boom 12 and the bucket 13 as appropriate.

[0024] A backhoe 17, which is an example of a work machine, is attached to the rear of the tractor 1 via a lifting device 16. The lifting device 16 can hydraulically raise and lower the attached work machine (in this embodiment, the backhoe 17). As shown in Figures 1 and 2, the backhoe 17 includes a base 18, outriggers 19, a swing bracket 20, a boom 21, an arm 22, a bucket 23, a swing cylinder 24, a boom cylinder 25, an arm cylinder 26, a bucket cylinder 27, and a control lever 28.

[0025] The base 18 is attached to the rear of the tractor 1 via the lifting device 16. The top surface of the base 18 forms a floor on which the driver operates the backhoe 17. Outriggers 19 are provided on the left and right sides of the base 18. The swing bracket 20 can rotate left and right relative to the base 18 by extending and retracting a swing cylinder 24. The boom 21 can rotate up and down relative to the swing bracket 20 by extending and retracting a boom cylinder 25. The arm 22 can rotate up and down relative to the boom 21 by extending and retracting an arm cylinder 26. The bucket 23 can rotate up and down relative to the arm 22 by extending and retracting a bucket cylinder 27. A control lever 28 for operating the backhoe 17 is provided on the top of the base 18. By operating the control lever 28, earth and sand excavation work, etc. can be performed.

[0026] As shown in Fig. 3, the motor 3 of the tractor 1 is supplied with power from an onboard battery 81 mounted on the body of the tractor 1 and a work machine onboard battery 91 mounted on the work machine (in this embodiment, a backhoe 17). Below, a configuration (power supply system) related to the power supply from the onboard battery 81 and the work machine onboard battery 91 to the motor 3 will be described. The power supply system of the tractor 1 mainly comprises the onboard battery 81, a converter 82, a onboard switch 83, a work machine switch 84, a onboard connection unit 85, the onboard battery 91, and the work machine connection unit 92.

[0027] The onboard battery 81 is capable of storing and discharging electricity. The onboard battery 81 is disposed in the body of the tractor 1 (the main part of the tractor 1 excluding the work implements such as the front loader 11 and the backhoe 17).

[0028] The converter 82 converts current as needed. The converter 82 can convert DC current supplied from the main machine mounted battery 81 or the work machine mounted battery 91 into DC current of a different voltage. The converter 82 can be disposed at any position on the body of the tractor 1.

[0029] The main machine side connection part 85 is capable of connecting the wiring of the body of the tractor 1 and the wiring of the backhoe 17 by being connected to the work machine side connection part 92 described later.

[0030] The machine-side switch 83 and the work machine-side switch 84 are capable of opening and closing the wiring that is the current flow path. The machine-side switch 83 is disposed midway in the wiring that connects the machine-mounted battery 81 and the converter 82. The work machine-side switch 84 is disposed midway in the wiring that connects the machine-side connection part 85 and the converter 82.

[0031] The main machine mounted battery 81, converter 82, main machine side switch 83, work implement side switch 84 and main machine side connection part 85 can be arranged at any position on the body of the tractor 1.

[0032] The work machine mounted battery 91 is capable of storing and discharging electricity. The work machine mounted battery 91 is disposed in the backhoe 17.

[0033] The work machine side connection part 92 is connected to the main machine side connection part 85, thereby making it possible to connect the wiring of the body of the tractor 1 with the wiring of the backhoe 17. The work machine side connection part 92 is configured to be detachable from the main machine side connection part 85.

[0034] The work machine-mounted battery 91 and the work machine-side connection part 92 can be disposed in any position on the backhoe 17. In this embodiment, as shown in Fig. 2, the work machine-mounted battery 91 is disposed on the floor of the backhoe 17 (the upper surface of the base 18). By placing the work machine-mounted battery 91 on the upper surface of the structure (base 18) of the backhoe 17 in this way, it is possible to prevent interference between the work machine-mounted battery 91 and the ground, obstacles, etc.

[0035] When the backhoe 17 is attached to the body of the tractor 1, the work machine side connector 92 of the backhoe 17 is connected to the main machine side connector 85 of the body, as shown in Figure 3. This allows power to be supplied from the work machine mounted battery 91 mounted on the backhoe 17 to the body side of the tractor 1.

[0036] In this embodiment, the machine-mounted battery 81 and the work machine-mounted battery 91 are connected in parallel to the motor 3. The opening and closing of the machine-side switch 83 and the work machine-side switch 84 can be controlled by a control unit (not shown). By closing either the machine-side switch 83 or the work machine-side switch 84 and opening the other, power can be supplied to the converter 82 from either the machine-mounted battery 81 or the work machine-mounted battery 91. For example, when it is detected that a backhoe 17 has been attached to the tractor 1, power from the work machine-mounted battery 91 mounted on the backhoe 17 may be preferentially supplied to (used by) the motor 3.

[0037] The electric power is converted appropriately by the converter 82 and then supplied to the motor 3. The motor 3 can be operated using the electric power. The power generated by the operation of the motor 3 can be used as power for propelling the tractor 1 or for driving a pump that supplies hydraulic oil (hydraulic pressure) used in the front loader 11 and the backhoe 17.

[0038] In this way, in this embodiment, the motor 3 can be operated using power not only from the onboard battery 81 mounted on the body of the tractor 1, but also from the onboard battery 91 mounted on the backhoe 17. This eliminates the problem of insufficient capacity of the onboard battery 81, and enables the tractor 1 to be driven and worked for long periods of time, thereby improving convenience.

[0039] Furthermore, when the backhoe 17 is not in use, it may be removed from the tractor 1. While the backhoe 17 is removed in this manner, the work machine battery 91 mounted on the backhoe 17 can be charged. By charging the work machine battery 91 while the backhoe 17 is removed in this manner, it is possible to fully utilize the power when the backhoe 17 is attached to the tractor 1 again.

[0040] The arrangement of the work machine side connection part 92 for connecting the work machine mounted battery 91 to the vehicle body will be described below with reference to FIG.

[0041] As described above, when attaching the backhoe 17 to the tractor 1, it is necessary to connect the work machine side connection part 92 of the backhoe 17 to the main machine side connection part 85 of the vehicle body (see Figure 3). Here, each cylinder of the backhoe 17 (boom cylinder 25, etc.) is operated using hydraulic oil supplied from the vehicle body side of the tractor 1. Therefore, when attaching the backhoe 17 to the tractor 1, it is also necessary to connect the hydraulic hose H for supplying hydraulic oil from the vehicle body side of the tractor 1 to the backhoe 17. The backhoe 17 is provided with a hydraulic connection part 29 for connecting the hydraulic hose H.

[0042] Therefore, in this embodiment, the work machine side connection part 92 is disposed near the hydraulic connection part 29 for connecting the hydraulic hose H. Specifically, in the backhoe 17, the work machine side connection part 92 is disposed on the same side as the hydraulic connection part 29 in the left-right direction. For example, as shown in FIG. 4, if the hydraulic connection part 29 is disposed to the right of the center of the backhoe 17, the work machine side connection part 92 is also disposed on the right side. With this configuration, when attaching the backhoe 17 to the tractor 1, the worker can connect the hydraulic connection part 29 and the work machine side connection part 92 from one side (the right side) of the backhoe 17. This makes it easy to attach the backhoe 17.

[0043] A modified example of the power supply system will be described below with reference to FIG.

[0044] In the power supply system shown in Fig. 3, an example is shown in which the main machine on-board battery 81 and the work machine on-board battery 91 are connected in parallel to the motor 3, but the present invention is not limited to this. For example, as in the modified example shown in Fig. 5, the main machine on-board battery 81 and the work machine on-board battery 91 can also be connected in series to the motor 3.

[0045] Specifically, the work machine on-board battery 91 is connected to the main machine on-board battery 81 via the work machine-side switch 84. As a result, power from the work machine on-board battery 91 is supplied to the motor 3 via the main machine on-board battery 81. In this configuration, for example, power from the work machine on-board battery 91 can be used to charge the main machine on-board battery 81, and then the power from the main machine on-board battery 81 can be supplied to the motor 3.

[0046] Below, an overview of a mower 30 (rear cutter), which is another example of a work machine, will be described with reference to FIG.

[0047] 1 and 2, a backhoe 17 is shown as an example of a working machine, but the present invention is not limited to this and various working machines can be used. For example, Fig. 6 shows a brush cutter 30 as an example of a working machine.

[0048] The mower 30 comprises a deck 31 that opens downward, and a blade (not shown) that is rotatably mounted inside the deck 31. The mower 30 can be attached to the rear of the tractor 1, similar to the backhoe 17. The mower 30 can cut grass by rotating the blade using power transmitted from the tractor 1.

[0049] A work machine-mounted battery 91 is disposed on the deck 31. The work machine-mounted battery 91 is electrically connected to the body of the tractor 1, similar to the case of the backhoe 17 (see FIG. 3, etc.). This allows power from the work machine-mounted battery 91 mounted on the deck 31 to be supplied to the body of the tractor 1.

[0050] The working machine is not limited to the backhoe 17 or the brush cutter 30 described above, and various other working machines can be used. In addition, the working machine can be not only one that is attached to the rear of the tractor 1, but also one that is attached to the front of the tractor 1 or to the lower center of the front and rear.

[0051] Furthermore, the number and arrangement of the main machine mounted batteries 81 and the work machine mounted batteries 91 are not particularly limited, and any number of them can be arranged in any location.

[0052] In addition, in this embodiment, an example has been shown in which the power of the main machine mounted battery 81 and the work machine mounted battery 91 is used for the motor 3, but the present invention is not limited to this. In other words, the power of the main machine mounted battery 81 and the work machine mounted battery 91 can be used for various other devices.

[0053] Furthermore, in this embodiment, the motor 3 has been described as an example of a prime mover, but the present invention is not limited to this, and a prime mover other than the motor 3 (for example, an engine, etc.) can also be adopted.

[0054] In addition, in this embodiment, a tractor 1 has been described as an example of a work vehicle, but the present invention is not limited to this and can be applied to various other work vehicles (agricultural vehicles, construction vehicles, industrial vehicles, etc.).

[0055] As described above, the tractor 1 (work vehicle) according to this embodiment has the following features: The car body and A work machine (backhoe 17) attached to the vehicle body; a power supply device (work machine mounted battery 91) provided in the work machine and capable of supplying power to the vehicle body; It is equipped with the following. This configuration improves convenience. That is, the vehicle body can use power from the power supply device provided in the work machine, thereby increasing the working time of the work vehicle. Furthermore, when the work machine is not in use, the power supply device can be charged with the work machine removed.

[0056] Further, the power supply device It is capable of supplying electric power to the prime mover (motor 3) of the vehicle body. With this configuration, the electric power from the power supply device can be used to power the prime mover of the work vehicle.

[0057] Further, the working machine is Backhoe 17, The power supply device It is placed on the floor of the backhoe 17. This configuration allows the power supply device to be placed in a suitable location, specifically, in a location where it is less likely to come into contact with the ground or obstacles.

[0058] Further, the working machine is It is a lawnmower 30, The power supply device It is placed on a deck 31 that covers the blade of the mower 30. This configuration allows the power supply device to be placed in a suitable location, specifically, in a location where it is less likely to come into contact with the ground or obstacles.

[0059] In addition, the work vehicle according to this embodiment has The power supply device further includes a power connection section (work machine side connection section 92) that detachably connects the power supply device to the vehicle body. With this configuration, the power supply device can be easily attached and detached from the vehicle body.

[0060] Further, the working machine is a hydraulic device that operates by hydraulic pressure supplied via a hydraulic connection part 29 that is detachably connected to the vehicle body, The power connection portion (work machine side connection portion 92) is It is arranged on the same side as the hydraulic connection portion 29 in the left-right direction. With this configuration, the hydraulic connection portion and the power connection portion are arranged on the same side, which makes it easy to attach the work equipment.

[0061] The tractor 1 according to this embodiment is one embodiment of the work vehicle according to the present invention. The backhoe 17 and the mower 30 according to this embodiment are one embodiment of the working machine according to the present invention. The work machine-mounted battery 91 according to this embodiment is one embodiment of a power supply device according to the present invention. The motor 3 according to this embodiment is one embodiment of a prime mover according to the present invention. The work machine side connection portion 92 according to this embodiment is one embodiment of the power connection portion according to the present invention. [Explanation of symbols]

[0062] 1 Tractor 3 motors 17 Backhoe 30. Lawnmower 31 Deck 91 Battery mounted on work equipment 92 Work machine side connection part

Claims

1. The car body and a work machine attached to the vehicle body; a power supply device provided in the work machine and capable of supplying electric power to the vehicle body; A work vehicle equipped with the above.

2. The power supply device The vehicle body is capable of supplying electric power to a prime mover. The work vehicle according to claim 1.

3. The work machine is It is a backhoe, The power supply device Located on the floor of the backhoe, The work vehicle according to claim 1.

4. The work machine is It is a lawnmower, The power supply device placed on a deck covering the blade of the mower; The work vehicle according to claim 1.

5. Further, a power connection unit is provided for detachably connecting the power supply device to the vehicle body. The work vehicle according to claim 1.

6. The working machine is a hydraulic device that operates by hydraulic pressure supplied via a hydraulic connection part that is detachably connected to the vehicle body, The power connection In the left-right direction, it is arranged on the same side as the hydraulic connection portion. A work vehicle according to claim 5.

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