Power supply device

Abstract

To provide a power supply device that can be used as a power supply device in place of the PTO shaft of a tractor, and can be moved to a necessary place to supply power to various machines.SOLUTION: A power supply device includes a movable support base, and an electric motor including a motor body provided on the support base, and an output shaft including one end rotatably supported by the motor body and the other end opposite to the one end, and the output shaft is rotatable by the power of the motor body, and the support base is movable with the output shaft stopped rotating and the other end of the output shaft exposed.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a power supply device for supplying power to, for example, agricultural machines and the like. [Background technology]

[0002] Conventionally, there is known a machine that is driven by power supplied from an external drive shaft, as disclosed in Patent Document 1. The machine disclosed in Patent Document 1 is configured to be driven by power supplied from a PTO shaft of a tractor. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-26 [Patent Document 2] Japanese Patent Application Publication No. 9-314080 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when a stationary machine such as that disclosed in Patent Document 1 is driven by power supplied from the PTO shaft of a tractor, the tractor needs to be kept parked near the machine, and the tractor cannot be used for other tasks. On the other hand, the above-mentioned Patent Document 2 discloses a portable cleaner equipped with a motor. However, this portable washer cannot supply power to an external machine because the output shaft of the motor is connected to the plunger pump. In other words, this portable washer cannot supply power from the motor to an external machine (such as the machine disclosed in Patent Document 1) because the motor and plunger pump are integrated.

[0005] The present invention has been made to solve such problems, and has as its object to provide a power supply device that can be used as an alternative to the PTO shaft of a tractor and can be moved to a required location to supply power to various machines. [Means for solving the problem]

[0006] The technical means adopted by the present invention to solve the above problems are characterized as follows. The power supply device includes an electric motor having a movable support base, a motor body provided on the support base, and an output shaft including one end rotatably supported by the motor body and the other end opposite to the one end; a rotation stopper that prevents the support base from rotating around the output shaft when the output shaft of the electric motor rotates; The output shaft is rotatable by the power of the motor body, and the support base is movable in a state where the rotation of the output shaft is stopped and the other end of the output shaft is exposed. The anti-rotation portion has a connection member capable of connecting the support base to an object to be installed on the ground separately from the support base, and a connector for connecting to the object is provided at the tip of the connection member, and the connector has an upper plate, a lower plate, and a vertical shaft, the upper plate and the lower plate are arranged parallel to each other with a gap in the vertical direction, and a long hole extending in the width direction is formed in the upper plate and the lower plate, and the vertical shaft can move in the width direction along the long hole. .

[0007] Preferably, the other end side of the output shaft protrudes outward further than the outer edge of the support base, the output shaft is arranged between one end and the other end of the support base in the width direction, the connecting member includes a first connecting member arranged on the one end side in the width direction and a second connecting member arranged on the other end side in the width direction, the first connecting member and the second connecting member extend in a direction from the other end side of the output shaft toward the one end side, which is the opposite direction to the direction in which the output shaft protrudes from the outer edge of the support base, and the opposite ends of the first connecting member and the second connecting member protrude in the opposite direction further than the opposite outer edge of the support base.

[0008] Preferably, the installed object is a tractor equipped with a three-point link mechanism, the three-point link mechanism having a first link member arranged on one side of the tractor in the vehicle width direction, and a second link member arranged on the other side of the tractor in the vehicle width direction, the first connecting member being connectable to the first link member, and the second connecting member being connectable to the second link member.

[0009] Preferably, the power supply device includes a support member that supports a middle portion of the output shaft, the support member having a support bracket fixed to the support base, and a bearing attached to the support bracket and rotatably supporting the output shaft. Preferably, the power supply device includes an operating device, a control device disposed on the support base and configured to control the operation of the electric motor based on an operation signal from the operating device, and a power supply device including: and a communication cable that connects the operating device to a control device, the communication cable having a length that enables the operating device to be positioned at a distance from the support base, and the operating device having a magnet for fixing the operating device at a position away from the support base.

[0010] Preferably, the operation device transmits, as the operation signal, an electric signal including an ON signal and an OFF signal for the electric motor to the control device. Preferably, the support base has an upper plate and a side plate extending downward from the outer edge of the upper plate, the control device is attached to the support base below the upper plate, the side plate surrounds the periphery of the control device, and the lower side of the control device is open. Preferably, the side panel has a door that can be opened and closed around at least a portion of the periphery of the control device.

[0011] Preferably, the power supply device includes a caster that movably supports the support base, and an adjustment mechanism that can adjust the height of the output shaft, and the adjustment mechanism is capable of adjusting the length of a connecting member that connects the support base and the caster. Preferably, the power supply device includes a universal joint connected to an end of the output shaft, and the output shaft is connected to a driven machine via the universal joint. Preferably, the power supply device includes a handle that is gripped when pushing and moving the support base, the handle extending from the support base to above the electric motor.

[0012] Preferably, the power supply device includes a power cord for supplying power to the electric motor, and the support base has a locking portion for locking the power cord. Preferably, when the total length of the electric motor in the extension direction of the output shaft is defined as a first length, the length of the support base in the extension direction is defined as a second length, and the length of the support base in a direction perpendicular to the extension direction is defined as a third length, the second length and the third length are shorter than the first length. Preferably, the other end of the output shaft is connectable to an agricultural machine. Effect of the Invention

[0013] The power supply device according to the present invention can be used as a power supply device in place of the PTO shaft of a tractor, and can be moved to a location where it is needed to supply power to various machines. [Brief description of the drawings]

[0014] [Figure 1] FIG. 2 is a perspective view of the power supply device as seen from the right front. [Diagram 2] FIG. 2 is a perspective view of the power supply device as seen from the left front. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. 13 is a side view showing the state in which the door of the support base is open. [Figure 7] 1 is a plan view showing an example of a state in which a connecting member is connected to a three-point link mechanism of a tractor and an output shaft is connected to a driven machine. FIG. [Figure 8] 13 is a plan view showing another example of a state in which the connecting member is connected to a three-point linkage of a tractor and the output shaft is connected to a driven machine. FIG. [Figure 9] FIG. 4 is a plan view showing an example of a state in which a connecting member and an output shaft are connected to a driven machine. [Figure 10A] 13 is a diagram showing a state in which the power supply device is moving toward the driven machine with the output shaft stopped rotating and the other end of the output shaft exposed. FIG. [Figure 10B] FIG. 2 is a diagram showing a state in which an output shaft of the power supply device is connected to a driven machine. [Figure 11] 1 is a diagram showing a state in which an output shaft of a power supply device is connected to a preparation machine, which is an example of an agricultural machine that is a driven machine. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, preferred embodiments of a power supply device according to the present invention will be described. 1 to 6, the power supply device 1 according to the present invention includes a movable support base 2 and an electric motor 3 mounted on the support base 2. In other words, the power supply device 1 according to the present invention is a mobile power supply device in which the electric motor 3 is mounted on the movable support base 2. For the sake of convenience, the arrow A1 direction in FIG. 1 is the forward direction, the arrow A2 direction is the rearward direction, and the arrow B1 direction is the forward direction. The direction of arrow A in Figure 1 is the front-rear direction, and the direction of arrow B is the width direction.

[0016] The support base 2 includes a base 4 and rolling elements such as casters 5 that movably support the base 4. The base 4 includes an upper plate 6 and a side plate 7. The side plate 7 extends downward from the outer edge of the upper plate 6. That is, the base 4 is formed in a box shape, and the lower surface of the base 4 (below the upper plate 6) is open. An electric motor 3 is mounted on the upper surface of the base 4 (the upper surface of the upper plate 6). The upper plate 6 is rectangular in plan view. The side plates 7 include a front plate 7a, a rear plate 7b, a left side plate 7c, and a right side plate 7d. The front plate 7a extends downward from the front edge of the upper plate 6. The rear plate 7b extends downward from the rear edge of the upper plate 6. The left side plate 7c extends downward from the left edge of the upper plate 6. The right side plate 7d extends downward from the right edge of the upper plate 6. In this embodiment, the base 4 is configured in a rectangular parallelepiped shape, but the shape of the base 4 is not limited to a rectangular parallelepiped shape.

[0017] At least one of the side panels 7 of the base 4 is a door that can be opened and closed. As shown in FIG. 3, in this embodiment, the left side panel 7c is a door that can be opened and closed. In the following description, the left side panel 7c is also referred to as "door 7c". The imaginary line in FIG. 3 shows the state in which the door 7c is open. As shown in FIG. 3, the door 7c can be opened from the rear side with the front side as a fulcrum. However, the opening direction of the door 7c is not limited to this, and the door 7c may be configured to open from the front side with the rear side as a fulcrum. In addition, a side panel 7 other than the left side panel 7c may be a door that can be opened and closed. In addition, two or more side panels 7 may be doors that can be opened and closed. A handle 7e is provided on the outer surface of the rear part of the door 7c to be held when opening and closing the door 7c.

[0018] 6, a magnet 8 is attached to the base 4. The door 7c is made of metal and can be attached to the magnet 8 when in a closed state. This allows the door 7c to be maintained in a closed state. The casters 5 are connected to the support base 2 by connecting members 9. The connecting members 9 are columnar members extending downward from each of the four corners (front, back, left and right corners) of the support base 2. In other words, the four connecting members 9 extend downward from the support base 2. The casters 5 are attached to the lower part of each of the four connecting members 9.

[0019] The caster 5 has a wheel 10 and an attachment part 11. The attachment part 11 is attached to the lower part of the connecting member 9. The wheel 10 is attached to the attachment part 11 so as to be rotatable around a horizontal axis. The wheel 10 comes into contact with the floor surface and rotates, causing the support base 2 to move on the floor surface. The wheel 10 can also rotate around a vertical axis, and this rotation allows the direction of the wheel 10 to be changed.

[0020] As shown in FIG. 2 etc., the casters 5 are provided with stopper plates 12. It is preferable to provide the stopper plates 12 on at least two of the four casters 5. In the present embodiment, the stopper plates 12 are provided on the two casters 5 on the right side, but the stopper plates 12 may be provided on the other casters 5. The wheels 10 can be made unrotatable (locked state) by stepping on the stopper plate 12 with a foot or the like to cause it to swing. By locking the wheels 10, the support base 2 can be fixed in a predetermined position so that it cannot move.

[0021] The electric motor 3 has a motor body 13 and an output shaft 14. The motor body 13 is provided on the support base 2. Specifically, the motor body 13 is attached to the upper surface of the upper plate 6 of the base 4. The output shaft 14 can be rotated by the power of the motor body 13. As shown in FIG. 4, the output shaft 14 includes one end 14a rotatably supported by the motor body 13, and the other end 14b opposite to the one end 14a.

[0022] As shown in Figs. 1 to 4 etc., the motor body 13 is disposed so that its longitudinal direction faces the front-rear direction. The output shaft 14 extends in the front-rear direction. The output shaft 14 extends and protrudes forward from the motor body 13. The other end 14b side of the output shaft 14 protrudes outward (forward) beyond the outer edge (front edge) of the support base 2. The output shaft 14 is disposed between one end (left end) and the other end (right end) in the width direction of the support base 2. In the case of this embodiment, the output shaft 14 is disposed in the center of the support base 2 in the width direction.

[0023] As shown in FIG. 4, the output shaft 14 is composed of a shaft body 141 and an extension shaft 142. The shaft body 141 protrudes from the motor body 13. The extension shaft 142 is disposed on the tip side (front end side) of the shaft body 141 and is connected to the shaft body 141 by a coupling 15. The shaft centers of the shaft body 141 and the extension shaft 142 are disposed on the same straight line and rotate integrally. However, the output shaft 14 may be composed of only the shaft body 141 without the extension shaft 142, that is, a single shaft body. In this case, the length of the shaft body 141 can be extended to the portion of the extension shaft 142.

[0024] 1 to 4, the power supply device 1 includes a support member 16 that supports a middle portion of the output shaft 14. In the present embodiment, the support member 16 supports a middle portion of the extension shaft 142. The support member 16 has a support bracket 17 and a bearing 18. The support bracket 17 is fixed to the upper plate 6 of the base 4. The support bracket 17 stands upright from the upper plate 6. The height of the support bracket 17 (height from the upper surface of the upper plate 6) is greater than the height of the output shaft 14 (height from the upper surface of the upper plate 6).

[0025] As shown in FIG. 2, FIG. 3, etc., the support bracket 17 has a front plate portion 17a, a left plate portion 17b, a right plate portion 17c, and a lower plate portion 17d. The front plate portion 17a, the left plate portion 17b, the right plate portion 17c, and the lower plate portion 17d are formed by bending a single plate material. The front plate portion 17a extends in the width direction along the front edge of the upper plate 6. The left plate portion 17b extends rearward (toward the motor body 13) from the left end portion of the front plate portion 17a. The right plate portion 17c extends rearward from the right end portion of the front plate portion 17a. The lower plate portion 17d extends rearward from the lower end portion of the front plate portion 17a. The lower plate portion 17d is fixed to the upper surface of the upper plate 6.

[0026] The bearing 18 is attached to the support bracket 17 and rotatably supports the output shaft 14. The bearing 18 is accommodated in a housing 19. The housing 19 is fixed to the support bracket 17. The bearing 18 is fixed to the support bracket 17 via the housing 19. Specifically, the housing 19 is fixed to the front surface of the front plate portion 17a. The bearing 18 is fixed to the front surface of the front plate portion 17a via the housing 19. The outer ring of the bearing 18 is fixed to the housing 19, and the inner ring is fitted onto the output shaft 14. A rolling element (such as a ball) is disposed between the outer ring and the inner ring.

[0027] As shown in Figs. 1 to 3, the other end of the output shaft 14 is exposed. In other words, the other end of the output shaft 14 is movable to any location when not connected to a machine driven by power supplied from the electric motor 3 (hereinafter referred to as the "driven machine"). In other words, the power supply device 1 is not a device in which the electric motor 3 and the driven machine are integrated. In other words, the output shaft 14 is connectable to the driven machine, and is in a state in which it cannot supply power to the driven machine (unsupplyable state) when it is not connected to the driven machine (a state in which the other end of the output shaft 14 is exposed), and is in a state in which it supplies power to the driven machine (supplyable state) when it is connected to the driven machine.

[0028] That is, as shown in Fig. 10A, the power supply device 1 (support base 2) can move with the rotation of the output shaft 14 stopped and the other end 14b of the output shaft 14 exposed. As shown in Fig. 10B, the support base 2 can be brought close to a stationary (fixed) driven machine 50, and the output shaft 14 can be connected to the driven machine 50 via a member or device such as a universal joint 20 described later. In this way, the power supply device 1 can move the support base 2 to connect the other end of the output shaft 14 to various driven machines 50. In this way, the power supply device 1 can move the support base 2 to supply the power of the electric motor 3 to various driven machines 50.

[0029] The machine (driven machine 50) driven by the electric motor 3 is, for example, a stationary type (fixed type) agricultural machine that is installed in a barn, a factory, a workshop, or the like. In other words, the power supply device 1 is, for example, a device for supplying power to the stationary type agricultural machine. The stationary type agricultural machine is, for example, a preparation machine that prepares agricultural crops (spinach, onion, carrot, potato, taro, etc.). However, the stationary type agricultural machine may also be an agricultural machine other than a crop preparation machine (for example, a dairy farming machine, etc.). The other end of the output shaft 14 of the electric motor 3 can be connected to a stationary (fixed) agricultural machine. Specifically, the other end of the output shaft 14 can be connected to a power input section (input shaft, etc.) of the stationary agricultural machine. Note that the output shaft 14 of the power supply device 1 can also be connected to a stationary (fixed) agricultural machine other than the agricultural machine. It can also be connected to machines that are fixed on the mounting bracket.

[0030] Fig. 11 shows a crop preparation machine, which is an example of a stationary type (fixed type) agricultural machine. In other words, the preparation machine shown in Fig. 11 is an example of an agricultural machine as a driven machine 50 to which power is supplied by a power supply device 1, and will be referred to as "preparation machine 50" below. The preparation machine 50 includes a preparation unit 54 that prepares agricultural products, and an installation unit 55 that is installed on a floor surface G1 of a barn, a factory, a workshop, etc. The installation unit 55 is a leg (pillar) that extends downward from a support frame 56 that supports the preparation unit 54, and the lower end portion is grounded on the floor surface G1. The preparation machine 50 is installed at a predetermined position on the floor surface G1 with the installation unit 55 grounded on the floor surface G1.

[0031] The preparation machine 50 includes an input shaft 51. The input shaft 51 is connected to the output shaft 14 of the electric motor 3 of the power supply device 1 via a universal joint 20 described below. This allows power to be supplied (input) from the power supply device 1 to the input shaft 51 to rotate the input shaft 51. The power for rotating the input shaft 51 is supplied to the preparation unit 54 via a power transmission mechanism 52 consisting of a pulley and a belt. The preparation unit 54 is driven by the supplied power to perform work of preparing (separating, etc.) the agricultural products. In the case of the preparation machine 50 shown in Fig. 11, the preparation unit 54 is a mechanism for separating agricultural products such as taro. However, the preparation unit 54 is not limited to this, and may be, for example, a mechanism for peeling the agricultural products, cutting the roots, leaves, stems, etc., washing, aligning, etc.

[0032] 4, a universal joint 20 can be connected to the tip of the output shaft 14. By connecting the universal joint 20 to the tip of the output shaft 14, the output shaft 14 can be connected to the driven machine 50 via the universal joint 20. By using the universal joint 20, even if the axis of the output shaft 14 of the electric motor 3 and the axis of the input shaft of the driven machine 50 are misaligned, power can be smoothly transmitted from the output shaft 14 to the input shaft by connecting the output shaft 14 and the input shaft via the universal joint 20. 6, the power supply device 1 includes an adjustment mechanism 21 capable of adjusting the height of the output shaft 14. The adjustment mechanism 21 is capable of adjusting the length of the connecting member 9 that connects the support base 2 and the caster 5. The adjustment mechanism 21 is composed of an outer cylinder 91, an inner cylinder 92, and a pin 22, which will be described below.

[0033] As shown in FIG. 6, the connecting member 9 has an outer cylinder 91 and an inner cylinder 92. The outer cylinder 91 is fixed to the base 4 and extends in the vertical direction. An upper part of the inner cylinder 92 is inserted into the outer cylinder 91. A lower part of the inner cylinder 92 extends downward from the outer cylinder 91. The inner cylinder 92 is movable in the vertical direction along the outer cylinder 91. The length of the connecting member 9 can be adjusted by moving the inner cylinder 92 in the vertical direction. A first through hole 91a is formed in the outer cylinder 91. A plurality of second through holes 92a (see also FIG. 2) are formed in the inner cylinder 92. The plurality of second through holes 92a are arranged at intervals in the vertical direction. The vertical position of the inner cylinder body 92 relative to the outer cylinder body 91 is fixed by overlapping the first through hole 91a with any one of the multiple second through holes 92a and inserting the pin 22 into the overlapping first through hole 91a and second through hole 92a. This makes it possible to fix the length of the connecting member 9. In addition, the length of the connecting member 9 can be changed by changing the second through hole 92a into which the pin 22 is inserted.

[0034] As shown in FIG. 6, the first through hole 91a is formed at a position overlapping with the side plate 7 in the up-down direction. The first through hole 91a penetrates the inner portion (the inner plate material) of the outer cylinder body 91 in the front-rear direction. The pin 22 is inserted into the first through hole 91a and the second through hole 92a in the front-rear direction from the inside to the outside of the side plate 7. As a result, the pin 22 is disposed on the inside of the side plate 7 and is not exposed to the outside of the side plate 7 (see FIGS. 1 and 2). Therefore, unintentional contact with the pin 22 can be suppressed, and the pin 22 can be prevented from being removed from the first through hole 91a and the second through hole 92a due to the contact.

[0035] The adjustment mechanism 21 can adjust the height of the output shaft 14 by changing the length of the connecting member 9. By being able to adjust the height of the output shaft 14, the output shaft 14 of the electric motor 3 can be adjusted. Even if there is a large difference in height between the axis of the output shaft 14 and the axis of the input shaft of the driven machine 50 and this difference cannot be absorbed by the universal joint 20, it is possible to connect the output shaft 14 and the input shaft whose height has been adjusted, and to transmit power smoothly from the output shaft 14 to the input shaft.

[0036] As shown in Figs. 2 and 3, the power supply device 1 includes a power cord 23 that supplies power to the electric motor 3. One end of the power cord 23 is connected to the motor body 13 of the electric motor 3 via a control device 26, which will be described later. The other end of the power cord 23 is provided with a plug 24 that can be connected to a power source. By connecting the plug 24 to a power source, power can be supplied from the power cord 23 to the electric motor 3 to drive the electric motor 3. The power source to which the plug 24 is connected may be an outlet provided in a work area such as a factory, or may be a generator. In this embodiment, as shown in Fig. 10A, the power supply device 1 is moved to a predetermined location with the plug 24 removed from the power source, and as shown in Fig. 10B, the plug 24 is connected to a power source 57 at the destination where the driven machine 50 is installed, thereby driving the electric motor 3 near the driven machine 50.

[0037] As shown in Fig. 5, the support base 2 preferably has a locking portion 25 for locking the power cord 23. The locking portion 25 is provided on the upper surface of the support base 2 (the upper surface of the upper plate 6). The power cord 23 can be hooked onto the locking portion 25 in a wound state. In the example shown in Fig. 5, the locking portion 25 is composed of an L-shaped member. However, the shape of the locking portion 25 is not limited to an L-shape, and may be another shape such as a U-shape or a C-shape. As shown in FIGS. 1, 3, 4, 6, and the like, the power supply device 1 includes a control device 26 and an operation device 27.

[0038] The control device 26 is a device that controls the operation of the electric motor 3. The control device 26 is an inverter or a device including an inverter. The control device 26 is disposed on the support base 2. Specifically, the control device 26 is attached to the support base 2 below the upper plate 6 of the base 4. The control device 26 is attached to the inner surface of a side plate 7 (right side plate 7d in this embodiment). The side plates 7 (front side plate 7a, rear side plate 7b, left side plate 7c, right side plate 7d) surround the periphery of the control device 26. In other words, the control device 26 is disposed in a space surrounded by the multiple side plates 7. This prevents dust from adhering to or entering the control device 26, and prevents breakdowns in the control device 26.

[0039] In addition, the side panel 7 has a door 7c that can open and close at least a part of the periphery of the control device 26 (the left side of the control device 26 in this embodiment). Therefore, by opening the door 7c, it becomes possible to easily access the control device 26. This makes it easy to perform maintenance of the control device 26. As described above, the base 4 of the support stand 2 is open downward. Therefore, the bottom of the control device 26 is open. This allows heat generated from the control device 26 to escape downward, and prevents heat from building up inside the support stand 2 (the space surrounded by the multiple side plates 7) and adversely affecting the control device 26.

[0040] The operation device 27 is a device that transmits an operation signal to the control device 26. The control device 26 controls the operation of the electric motor 3 based on the operation signal from the operation device 27. The operation device 27 transmits an electric signal including an ON signal and an OFF signal for the electric motor 3 to the control device 26 as the operation signal. When the operation device 27 transmits an ON signal, the control device 26 drives the electric motor 3. When the operation device 27 transmits an OFF signal, the control device 26 stops the electric motor 3.

[0041] The operating device 27 can also transmit, as an operation signal, an electrical signal for changing the rotation speed of the electric motor 3 to the control device 26. In this case, when the operation signal is transmitted from the operating device 27, the control device 26 changes the rotation speed of the electric motor 3. 1 and 3, the operation device 27 has an operation unit 27a to be operated by an operator. The operation unit 27a is composed of a push button, a changeover switch, a touch panel, etc. By operating the operation unit 27a, an operation signal can be transmitted from the operation device 27 to the control device 26.

[0042] As shown in FIGS. 1 and 3, the operation device 27 and the control device 26 are connected by a communication cable 28. The communication cable 28 is a cable for transmitting an operation signal (electrical signal) sent from the operation device 27 to the control device 26. The communication cable 28 has a length that allows the operation device 27 to be disposed at a position away from the support base 2. This makes it possible to operate the operation device 27 at a position away from the power supply device 1. Therefore, it becomes possible to operate the operation device 27 near the driven machine 50 to which power is supplied from the output shaft 14.

[0043] The length of the communication cable 28 is not particularly limited, but can be set to a length that allows the operation device 27 to be disposed at a distance "greater than or equal to the length in the front-rear direction or the length in the width direction of the support base 2" from the support base 2. The length of the communication cable 28 can also be set to, for example, greater than or equal to the length of the connection member 32 described below. As shown in Figs. 1 and 3, the operating device 27 has a magnet 29 for fixing the operating device 27 at a position away from the support base 2. This allows the operating device 27 to be fixed to a metal member by the magnetic force of the magnet 29. Generally, a driven machine 50 such as an agricultural machine includes a metal member (e.g., steel). Therefore, the operating device 27 can be fixed to the driven machine 50 by the magnetic force of the magnet 29. In addition, by configuring the support base 2 of the power supply device 1 from a metal member, the operating device 27 can also be fixed to the support base 2 by the magnetic force of the magnet 29.

[0044] The power supply device 1 can be moved by being pushed by human power. As shown in Figs. 1 to 5, the power supply device 1 is provided with a handle 30 that is held when pushing and moving the support base 2. This allows an operator to hold the handle 30 and push the support base 2, so that the support base 2 together with the electric motor 3 can be easily moved. The handle 30 extends rearward from the rear side plate 7b behind the electric motor 3. As shown by the imaginary line in Fig. 4, the handle 30 may extend from the support base 2 to above the electric motor 3 behind the electric motor 3. In the configuration shown in Fig. 4, the handle 30 extends upward from the upper plate 6 of the support base 2 to above the electric motor 3, but it may also extend upward from the side plate 7 to above the electric motor 3. By extending the handle 30 from the support base 2 to above the electric motor 3, the handle 30 functions as a guard material that prevents contact with the output shaft 14 of the electric motor 3.

[0045] 1 to 6, the driven machine 50 driven by the electric motor 3 is not installed on the support base 2. Therefore, the support base 2 does not require installation space for the driven machine and is configured compactly. As shown in Fig. 3, when the total length of the electric motor 3 in the extension direction of the output shaft 14 is defined as a first length L1, the length of the support base 2 in the extension direction is defined as a second length L2, and the length of the support base 2 in a direction perpendicular to the extension direction is defined as a third length L3, the second length L2 and the third length L3 are shorter than the first length L1.

[0046] As shown in Figs. 1 to 5, the power supply device 1 includes a rotation prevention portion 31 that prevents the support base 2 from rotating about the output shaft 14 of the electric motor 3 when the output shaft 14 rotates. As described above, the support base 2 is lightweight because the driven machine 50 driven by the electric motor 3 is not installed thereon and the support base 2 is configured compactly. Therefore, when the output shaft 14 is rotated while connected to the driven machine 50 (particularly when the output shaft 14 starts), there is a risk that the support base 2 will rotate about the output shaft 14. The rotation prevention portion 31 prevents the support base 2 from rotating about the output shaft 14 when the output shaft 14 is rotated while connected to the driven machine 50.

[0047] The anti-rotation portion 31 has a connection member 32 capable of connecting the support base 2 to an installed object that is installed on the ground separately from the support base 2. The installed object is preferably a heavy object heavier than the power supply device 1. The installed object is, for example, a tractor equipped with a three-point linkage mechanism, a driven machine 50 such as an agricultural machine, etc. The installed object may also be an object fixed to the ground, such as a building.

[0048] The connection members 32 are provided at least at two locations in the width direction sandwiching the output shaft 14. The connection members 32 include a first connection member 32A and a second connection member 32B. The first connection member 32A is disposed on one end side (left end side) of the support base 2 in the width direction. The second connection member 32B is disposed on the other end side (right end side) of the support base 2 in the width direction. The connection members 32 extend in a direction parallel to the direction in which the output shaft 14 extends. The first connection member 32A and the second connection member 32B extend in the same direction (front-rear direction) parallel to each other. In the case of this embodiment, the first connection member 32A and the second connection member 32B extend in a direction (forward) from one end side of the output shaft 14 toward the other end side. However, the first connection member 32A and the second connection member 32B may extend in a direction (rear) from the other end side of the output shaft 14 toward one end side.

[0049] In the above-described embodiment, the anti-rotation portion 31 includes at least two connecting members 32, but may include one connecting member 32. Also, the connecting member 32 is a member extending in the horizontal direction (width direction), but may be a member (leg member) extending in the vertical direction (height direction). When the connecting member 32 is a member extending in the height direction, the lower part of the connecting member 32 is connected to an installation fixed to the ground.

[0050] 4, the base end of the connecting member 32 is located between the motor body 13 and the support member 16 in the front-rear direction. The tip end of the connecting member 32 is located farther from the support base 2 than the other end 14b of the output shaft 14. In addition, the tip end of the connecting member 32 is located farther from the support base 2 than the universal joint 20. In this embodiment, the length of the connecting member 32 is fixed, but the length of the connecting member 32 may be changeable.

[0051] 4, the height of the connection member 32 is higher than the height of the upper surface of the base 4. The height of the connection member 32 is lower than the height of the output shaft 14. In this embodiment, the height of the connection member 32 is fixed, but the height of the connection member 32 may be changeable. In this embodiment, the distance (distance in the width direction) between the first connecting member 32A and the base 4 and the distance (distance in the width direction) between the second connecting member 32B and the base 4 are the same. In this embodiment, the first connecting member 32A and the second connecting member 32B have the same length and height. However, the distance between the first connecting member 32A and the base 4 and the distance between the second connecting member 32B and the base 4 may be different. In addition, the length and / or height of the first connecting member 32A and the second connecting member 32B may be different.

[0052] As shown in Figs. 1 to 5, a connector 33 for connecting to an object to be installed is provided at the tip of the connection member 32. The connector 33 has an upper plate 33a, a lower plate 33b, and a vertical shaft 33c. The upper plate 33a and the lower plate 33b are arranged parallel to each other with a gap in the vertical direction. The upper plate 33a and the lower plate 33b are formed with a long hole 33d extending in the width direction. The vertical shaft 33c extends in the vertical direction so as to penetrate the long hole 33d formed in the upper plate 33a and the lower plate 33b. The vertical shaft 33c can move in the width direction along the long hole 33d.

[0053] The base end of the connection member 32 is connected to the support base 2 by the connector 34. The connector 34 includes a first connector 34A and a second connector 34B. The first connector 34A connects the first connection member 32A to the left side plate 7c of the base 4. The second connector 34B connects the second connection member 32B to the right side plate 7d of the base 4. The first connector 34A extends leftward from the left side plate 7c. The second connector 34B extends rightward from the right side plate 7d. That is, the first connector 34A and the second connector 34B extend in directions away from each other from the base 4. As a result, the widthwise distance between the first connection member 32A and the second connection member 32B is longer than the widthwise length of the support base 2. In this embodiment, the distance in the width direction between the first connecting member 32A and the second connecting member 32B is fixed, but the distance in the width direction between the first connecting member 32A and the second connecting member 32B may be changeable.

[0054] 7 to 9 show a state in which the connection member 32 is connected to an installed object. 7 and 8 show a case where the installation object is a tractor 35. Note that only the rear part of the tractor 35 (cabin 35a, rear wheels 35b, rear wheel fender 35c, etc.) is shown in Figs. 7 and 8. The tractor 35 is equipped with a three-point link mechanism 36. A work implement such as a tiller can be attached to the three-point link mechanism 36 so that it can be raised and lowered. The three-point link mechanism 36 extends rearward from the rear of the tractor 35. The three-point link mechanism 36 has a first link member 37, a second link member 38, and a third link member 39. The first link member 37 and the second link member 38 are lower links. The first link member 37 is disposed on one side of the tractor 35 in the vehicle width direction. The second link member 38 is disposed on the other side of the tractor 35 in the vehicle width direction. The third link member 39 is a top link. The third link section The material 39 is disposed in the center in the vehicle body width direction of the tractor 35. The third link member 39 is disposed higher than the first link member 37 and the second link member 38.

[0055] The connection member 32 of the anti-rotation portion 31 of the power supply device 1 is connectable to a three-point link mechanism . The first connection member 32A is connectable to a first link member 37. The second connection member 32B is connectable to a second link member . 7 and 8, in the power supply device 1, the first connecting member 32A is connected to the first link member 37, and the second connecting member 32B is connected to the second link member 38. The output shaft 14 of the electric motor 3 is connected to the input shaft 51 of the driven machine 50 via a universal joint 20.

[0056] 7, a power transmission mechanism 52 is interposed between the universal joint 20 and the input shaft 51, but the universal joint 20 and the input shaft 51 may be connected by a shaft joint (coupling, etc.) without the power transmission mechanism 52. Whether or not to interpose the power transmission mechanism 52 can be determined in consideration of the type, specifications (position of the input shaft, etc.), size (length, width, etc.) of the driven machine 50, etc.

[0057] The power transmission mechanism 52 is a mechanism that transmits the power transmitted from the output shaft 14 to the universal joint 20 to the input shaft 51, and is composed of, for example, a gear transmission mechanism made up of a plurality of gears, a belt transmission mechanism made up of a pulley and a belt, or a chain transmission mechanism made up of a sprocket and a chain. The power output from the output shaft 14 is transmitted to the input shaft 51 of the driven machine 50 via the universal joint 20 and the power transmission mechanism 52, and drives the driven machine 50.

[0058] As shown in Fig. 7, when the output shaft 14 of the electric motor 3 of the power supply device 1 rotates while connected to the input shaft 51 of the driven machine 50, a force acts on the support base 2 to rotate the support base 2 about the output shaft 14 when the input shaft 51 of the driven machine 50 starts (or during the period from when the input shaft 51 starts until a predetermined number of rotations is reached). However, since the first connecting member 32A is connected to the first link member 37 and the second connecting member 32B is connected to the second link member 38, the force to rotate the support base 2 can be received by the tractor 35. Therefore, the support base 2 can be prevented from rotating about the output shaft 14.

[0059] 8, the first connecting member 32A and the second connecting member 32B extend in a direction (rearward) from the other end side toward one end side of the output shaft 14. Therefore, the direction in which the first connecting member 32A and the second connecting member 32B protrude from the support base 2 (rearward) is opposite to the direction in which the output shaft 14 protrudes from the support base 2 (forward). The driven machine 50 and the tractor 35 are disposed on opposite sides of the power supply device 1. Specifically, the driven machine 50 is disposed in front of the power supply device 1, and the tractor 35 is disposed behind the power supply device 1. An input shaft 51 of the driven machine 50 is connected to the output shaft 14 via a universal joint 20. A first link member 37 of the tractor 35 is connected to the first connecting member 32A, and a second link member 38 is connected to the second connecting member 32B.

[0060] The output shaft 14 of the electric motor 3 is connected to an input shaft 51 of a driven machine 50 via a universal joint 20. The power output from the output shaft 14 is transmitted to the input shaft 51 of the driven machine 50 via the universal joint 20, and drives the driven machine 50. 8, when the output shaft 14 of the electric motor 3 of the power supply device 1 rotates while connected to the input shaft 51 of the driven machine 50, a force acts on the support base 2 to rotate the support base 2 about the output shaft 14 when the input shaft 51 of the driven machine 50 starts (or during the period from when the input shaft 51 starts until it reaches a predetermined rotation speed). However, since the first connecting member 32A is connected to the first link member 37 and the second connecting member 32B is connected to the second link member 38, the force to rotate the support base 2 can be received by the tractor 35. Therefore, the support base 2 can be prevented from rotating about the output shaft 14.

[0061] FIG. 9 shows a case where the installed object is a driven machine 50. As shown in FIG. 9, the connection member 32 of the anti-rotation portion 31 of the power supply device 1 is connected to the driven machine 50. The driven machine 50 and the connection member 32 may be directly connected, or may be indirectly connected via another member. In the example shown in FIG. 9, the driven machine 50 and the connection member 32 are connected via an extension member 53 extending from the driven machine 50 toward the power supply device 1. The extension member 53 includes a first extension member 53A and a second extension member 53B arranged with an interval in the width direction. The first connection member 32A is connected to the first extension member 53A. The second connection member 32B is connected to the second extension member 53B.

[0062] The output shaft 14 of the electric motor 3 is connected to an input shaft 51 of a driven machine 50 via a universal joint 20. The power output from the output shaft 14 is transmitted to the input shaft 51 of the driven machine 50 via the universal joint 20, and drives the driven machine 50. 9, when the output shaft 14 of the electric motor 3 of the power supply device 1 is rotated while connected to the input shaft 51 of the driven machine 50, a force acts on the support base 2 to rotate the support base 2 about the output shaft 14 when the input shaft 51 of the driven machine 50 starts (or during the period from when the input shaft 51 starts until it reaches a predetermined rotation speed). However, since the first connecting member 32A and the second connecting member 32B are connected to the driven machine 50, the force to rotate the support base 2 can be received by the driven machine 50. Therefore, it is possible to prevent the support base 2 from rotating about the output shaft 14.

[0063] The power supply device 1 according to the above-described embodiment comprises a movable support base 2, a motor body 13 provided on the support base 2, and an electric motor 3 having an output shaft 14 including one end 14a rotatably supported on the motor body 13 and the other end 14b opposite the one end 14a, the output shaft 14 being rotatable by the power of the motor body 13, and the support base 2 being movable with the rotation of the output shaft 14 stopped and the other end 14b of the output shaft 14 exposed.

[0064] According to this configuration, the power supply device 1 can be used as a power supply device different from the PTO shaft of the tractor 35, and can be moved to a required location to supply power to various machines (driven machines). In detail, the power supply device 1 includes the support base 2 that can be moved with the rotation of the output shaft 14 stopped and the other end 14b of the output shaft 14 exposed, so that the support base 2 can be moved to a required location and any machine (driven machine) can be connected to the other end 14b of the output shaft 14. This allows the power supply device 1 to be moved to a required location to supply power to various machines.

[0065] The power supply device 1 also includes a rotation stopper 31 that prevents the support base 2 from rotating around the output shaft 14 when the output shaft 14 of the electric motor 3 rotates. According to this configuration, when the output shaft 14 of the electric motor 3 of the power supply device 1 is rotated while connected to the input shaft 51 of the driven machine 50, the anti-rotation portion 31 can prevent the support base 2 from rotating around the output shaft 14. In addition, the anti-rotation portion 31 has a connection member 32 capable of connecting the support base 2 to an object that is placed on the ground separately from the support base 2.

[0066] According to this configuration, by connecting the connecting member 32 to the installed object, when the output shaft 14 of the electric motor 3 rotates while connected to the input shaft 51 of the driven machine 50, the force that causes the support base 2 to rotate around the output shaft 14 is received by the installed object, thereby preventing the support base 2 from rotating around the output shaft 14. The other end 14b side of the output shaft 14 protrudes outward beyond the outer edge of the support base 2. According to this configuration, it is possible to easily connect the driven machine 50 to the other end 14b of the output shaft 14.

[0067] In addition, the output shaft 14 is arranged between one end and the other end in the width direction of the support base 2, and the connecting member 32 includes a first connecting member 32A arranged on the one end side and a second connecting member 32B arranged on the other end side. According to this configuration, the first connecting member 32A and the second connecting member 32B are disposed on both sides of the output shaft 14, so that the support base 2 and the installed object can be connected on both sides of the output shaft 14. Therefore, the force that causes the support base 2 to rotate around the output shaft 14 can be received by the installed object on both sides of the output shaft 14, so that the rotation of the support base 2 around the output shaft 14 can be reliably prevented.

[0068] The installed object is a tractor 35 equipped with a three-point link mechanism 36, which has a first link member 37 arranged on one side of the tractor 35 in the vehicle width direction, and a second link member 38 arranged on the other side of the tractor 35 in the vehicle width direction, and the first connecting member 32A is connectable to the first link member 37, and the second connecting member 32B is connectable to the second link member 38.

[0069] According to this configuration, the first connecting member 32A and the second connecting member 32B are connected to the three-point link mechanism 36 of the tractor 35, so that the force that tends to rotate the support base 2 around the output shaft 14 is received by the tractor 35, thereby preventing the support base 2 from rotating around the output shaft 14. The power supply device 1 also includes a support member 16 that supports a middle portion of the output shaft 14, and the support member 16 has a support bracket 17 fixed to the support base 2, and a bearing 18 that is attached to the support bracket 17 and rotatably supports the output shaft 14.

[0070] According to this configuration, one end of the output shaft 14 can be supported by the motor body 13, and the middle portion can be supported by the support member 16. Therefore, the output shaft 14 is supported at both ends by the motor body 13 and the support member 16. This allows the output shaft 14 to rotate stably even if the driven machine connected to the output shaft 14 vibrates. The power supply device 1 also includes an operating device 27, a control device 26 that is arranged on the support base 2 and controls the operation of the electric motor 3 based on an operation signal from the operating device 27, and a communication cable 28 that connects the operating device 27 and the control device 26, the communication cable 28 having a length that enables the operating device 27 to be arranged at a position away from the support base 2, and the operating device 27 has a magnet 29 for fixing the operating device 27 at a position away from the support base 2.

[0071] According to this configuration, the operation of the electric motor 3 can be controlled by operating the operation device 27 from a position away from the support base 2. Even if the driven machine driven by the electric motor 3 is located away from the support base 2, the operator can operate the driven machine by operating the operation device 27 from a position away from the support base 2 by fixing the operation device 27 to the driven machine with the magnet 29. Furthermore, when the operation device 27 is not being operated, the operation device 27 can be fixed to a position away from the support base 2 (the driven machine, etc.) with the magnet 29.

[0072] Moreover, the operating device 27 transmits, as an operating signal, an electric signal including an ON signal and an OFF signal for the electric motor 3 to the control device 26. According to this configuration, the electric motor 3 can be driven and stopped by operating the operating device 27 from a position away from the support base 2. In addition, the support base 2 has an upper plate 6 and a side plate 7 extending downward from the outer edge of the upper plate 6, and the control device 26 is attached to the support base 2 below the upper plate 6, and the side plate 7 surrounds the periphery of the control device 26, with the lower side of the control device 26 being open.

[0073] According to this configuration, the side plate 7 prevents dust from adhering to or entering the control device 26, thereby preventing breakdowns in the control device 26. In addition, since heat generated by the control device 26 can be dissipated downward, it is possible to prevent heat trapped inside the support base 2 from adversely affecting the control device 26. The side panel 7 also has a door 7c around the control device 26 that can be opened and closed. According to this configuration, by opening the door 7c, it is possible to easily access the control device 26. This makes it possible to easily perform maintenance on the control device 26.

[0074] In addition, the power supply device 1 is equipped with casters 5 that movably support the support base 2 and an adjustment mechanism 21 that can adjust the height of the output shaft 14, and the adjustment mechanism 21 is capable of adjusting the length of the connecting member 9 that connects the support base 2 and the casters 5. According to this configuration, even if the height of the axial center of the output shaft 14 of the electric motor 3 and the axial center of the input shaft of the driven machine 50 connected to the output shaft 14 are different, by adjusting the height of the output shaft 14, the output shaft 14 and the input shaft can be connected and power can be transmitted from the output shaft 14 to the driven machine 50.

[0075] The power supply device 1 further includes a universal joint 20 connected to the tip of the output shaft 14. The output shaft 14 is connected to a driven machine 50 via a universal joint 20. According to this configuration, even if the axis of the output shaft 14 of the electric motor 3 and the axis of the input shaft of the driven machine 50 are misaligned, by connecting the output shaft 14 and the input shaft via the universal joint 20, power can be transmitted smoothly from the output shaft 14 to the input shaft. The power supply device 1 also includes a handle 30 that is held when pushing and moving the support base 2 . The handle 30 extends from the support base 2 to above the electric motor 3 .

[0076] According to this configuration, an operator can grasp the handle 30 and push the support base 2, thereby easily moving the support base 2. In addition, the handle 30 can function as a guard material that prevents contact with the output shaft 14 of the electric motor 3. The power supply device 1 includes a power cord 23 that supplies power to the electric motor 3, and the support base 2 has a locking portion 25 for locking the power cord 23.

[0077] According to this configuration, by connecting the power cord 23 to a power source, it is possible to supply power from the power cord 23 to the electric motor 3. Furthermore, when the power cord 23 is not in use, it is possible to prevent inconveniences such as the power cord 23 interfering with the movement of the support base 2 by locking the power cord 23 to the locking portion 25. In the power supply device 1, when the total length of the electric motor 3 in the extension direction of the output shaft 14 is defined as a first length L1, the length of the support base 2 in the extension direction is defined as a second length L2, and the length of the support base 2 in a direction perpendicular to the extension direction is defined as a third length L3, the second length L2 and the third length L3 are shorter than the first length L1.

[0078] According to this configuration, the size (external dimensions) of the power supply device 1 relative to the electric motor 3 can be reduced, so that the power supply device 1 can be installed even in a small space and power can be supplied to the driven machine 50. The other end of the output shaft 14 can be connected to an agricultural machine. According to this configuration, the output shaft 14 of the electric motor 3 can be connected to the agricultural machine to supply power, so that it is possible to drive the agricultural machine, such as a crop preparation machine, without using the PTO shaft of the tractor 35. Therefore, it is not necessary to place the tractor 35 near the agricultural machine when driving the agricultural machine. This makes it possible to use the tractor 35 for another agricultural task while driving the agricultural machine with the electric motor 3, thereby improving the efficiency of the agricultural task.

[0079] Although the embodiment of the present invention has been described above, the embodiment disclosed herein should be considered as illustrative and not restrictive in all respects. The scope of the present invention is indicated by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0080] 1 Power supply device 2 Support stand 3. Electric motor 5 Caster 6 Upper Plate 7 Side Panel 7c door 13 Motor body 14 Output shaft 14a One end 14b Other end 16 Support member 17 Support bracket 18 Bearings 20 Universal joint 21 Adjustment mechanism 25 Locking part 26 Control device 27 Operating device 28 Communication Cables 29 Magnet 30 Handle 31 Anti-rotation part 32 Connection parts 32A First connecting member 32B Second connecting member 35 Tractor 36 Three-point linkage mechanism 37 First link member 38 Second link member 50 Driven Machinery

Claims

1. A movable support base; an electric motor including a motor body provided on the support stand and an output shaft including one end rotatably supported by the motor body and another end opposite to the one end; a rotation stopper that prevents the support base from rotating around the output shaft when the output shaft of the electric motor rotates; Equipped with The output shaft is rotatable by the power of the motor body, the support base is movable in a state where the rotation of the output shaft is stopped and the other end of the output shaft is exposed, The anti-rotation portion has a connection member capable of connecting the support base and an object to be installed on the ground separately from the support base, A connector for connecting to the installation object is provided at a tip end of the connection member, The connector has an upper plate, a lower plate and a vertical shaft, The upper plate and the lower plate are arranged parallel to each other with a gap therebetween in the vertical direction, The upper plate and the lower plate are formed with a long hole extending in the width direction, The vertical axis of the power supply device is movable in the width direction along the slot.

2. The other end side of the output shaft protrudes outward beyond the outer edge of the support base, The output shaft is disposed between one end and the other end in the width direction of the support base, the connection member includes a first connection member arranged on one end side in the width direction and a second connection member arranged on the other end side in the width direction, the first connecting member and the second connecting member extend in a direction from the other end side to the one end side of the output shaft, which is a direction opposite to a direction in which the output shaft protrudes from an outer edge of the support base, 2. The power supply device according to claim 1, wherein the opposite ends of the first connecting member and the second connecting member protrude in the opposite direction beyond an outer edge of the support base in the opposite direction.

3. The installation object is a tractor equipped with a three-point linkage mechanism, The three-point link mechanism includes a first link member arranged on one side of the tractor in a vehicle body width direction, and a second link member arranged on the other side of the tractor in the vehicle body width direction, the first connecting member is connectable to the first link member, The power supply device according to claim 2 , wherein the second connecting member is connectable to the second link member.

4. A support member is provided for supporting a middle portion of the output shaft, The support member is A support bracket fixed to the support base; a bearing attached to the support bracket and rotatably supporting the output shaft; 4. The power supply device according to claim 1, further comprising:

5. An operating device; a control device that is disposed on the support base and controls an operation of the electric motor based on an operation signal from the operation device; A communication cable connecting the operation device and the control device; Equipped with the communication cable has a length that allows the operation device to be disposed at a position away from the support base, 5. The power supply device according to claim 1, wherein the operating device has a magnet for fixing the operating device at a position separated from the support base.

6. 6. The power supply system according to claim 5, wherein the operation device transmits, as the operation signal, an electric signal including an ON signal and an OFF signal for the electric motor to the control device.

7. The support base has an upper plate and a side plate extending downward from an outer edge of the upper plate, The control device is attached to the support base below the upper plate, The side plate surrounds the periphery of the control device, 7. The power supply device according to claim 5, wherein a bottom of the control device is open.

8. 8. The power supply device according to claim 7, wherein the side panel has a door that can be opened and closed around at least a portion of the periphery of the control device.

9. Casters that movably support the support base; an adjustment mechanism capable of adjusting the height of the output shaft; Equipped with The power supply device according to any one of claims 1 to 8, wherein the adjustment mechanism is capable of adjusting a length of a connecting member that connects the support base and the caster.

10. A universal joint connected to a tip of the output shaft is provided.

10. The power supply device according to claim 1, wherein the output shaft is connected to a driven machine via the universal joint.

11. A handle is provided to be held when pushing and moving the support base, 11. The power supply device according to claim 1, wherein the handle extends from the support base to above the electric motor.

12. a power cord for supplying power to the electric motor; 12. The power supply device according to claim 1, wherein the support base has a locking portion for locking the power cord.

13. 13. A power supply device according to any one of claims 1 to 12, wherein when the total length of the electric motor in the extension direction of the output shaft is defined as a first length, the length of the support base in the extension direction is defined as a second length, and the length of the support base in a direction perpendicular to the extension direction is defined as a third length, the second length and the third length are shorter than the first length.

14. The power supply device according to any one of claims 1 to 13, wherein the other end of the output shaft is connectable to an agricultural machine.

Images