JP2018012464A - Electric work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate loading/unloading of a battery pack to/from a vehicle body while simplifying the configuration and reducing costs. An electric work vehicle includes a battery storage portion (8) and a battery pack (9) detachable from the battery storage portion (8), and the battery storage portion (8) guides the battery pack (9) between a loading position and a storage position. The battery pack 9 includes a unit 80, left and right wheels 60, a handle 61 arranged at the rear of the battery pack 9, and a guided unit 90 guided by the guide unit 80. The guided unit 90 includes left and right engaging portions 91 that engage with the rollers 81, and the rollers 81 engage with the engaging portions 91 when the battery pack 9 is unloaded at the unloading position. As a result, the battery pack 9 functions as a swing fulcrum that enables the loading and unloading swing of the battery pack 9. [Selection diagram] Fig. 4

Description

  The present invention relates to an electric work vehicle including a battery storage unit and a battery pack that is detachably attached to the battery storage unit.

  In the electric work vehicle as described above, as a configuration for detachably attaching the battery pack (battery) to the battery housing (vehicle body), the moving wheel provided in the battery pack, the transport position and the attachment position are provided. Turnable battery-side gripping part, lock mechanism that fixes the gripping part to the transfer position or mounting position, battery-side bracket that rotates together with the gripping part, body-side bracket, and these brackets can be rotated relative to each other Locking shaft to be connected, left and right rollers for guiding the battery pack to the battery housing, a vehicle body side buffer for receiving the battery pack rotated to the battery housing, a battery side mounting bracket, a vehicle body mounting bracket, Some have a locking rod that connects the mounting bracket to fix the battery pack to the battery compartment (for example, patent documents) Reference 1).

JP 2013-115 A (paragraph numbers 0043 to 0057, FIGS. 1 to 14)

According to the configuration described in Patent Document 1, when loading the battery pack onto the vehicle body, the operator first performs a moving operation of the battery pack that grasps the grip portion at the transport position and moves the battery pack to a connection position with the vehicle body. . Next, the gripping part is rotated together with the battery-side bracket from the transport position to the mounting position, and the gripping part is fixed at the mounting position. Thereafter, the battery side bracket and the vehicle body side bracket are connected by a locking shaft, and the battery pack is connected to the vehicle body so as to be rotatable. After the connection, the battery pack is loaded by rotating the battery pack toward the vehicle body with the locking shaft as a fulcrum while holding the gripping portion and guiding the back of the battery pack with the left and right rollers. Thereby, a battery pack can be loaded in a vehicle body. Thereafter, the battery-side mounting bracket and the vehicle body-side mounting bracket are connected by a locking rod, and the battery pack is fixed to the vehicle body.
When removing the battery pack from the vehicle body, the operator first releases the connection between the battery side mounting bracket and the vehicle body side mounting bracket by the locking rod to release the battery pack. Perform the release operation. Thereby, the battery pack can be removed from the vehicle body. Next, the battery pack is unloaded by rotating the battery pack to the ground contact position at the rear of the vehicle body while holding the gripping portion and guiding the back surface of the battery pack with the left and right rollers while using the locking shaft as a fulcrum. Thereafter, the connection between the battery side bracket and the vehicle body side bracket by the locking shaft is released, and the battery pack is released from the connection to release the connection between the battery pack and the vehicle body. After that, the gripping part is rotated together with the battery-side bracket from the mounting position to the transporting position and the gripping part is fixed to the transporting position. The battery pack is moved from the position.

That is, in the configuration described in Patent Document 1, when the battery pack is loaded on the vehicle body, the operator can perform the battery pack loading operation in addition to the battery pack moving operation and the battery pack loading operation. Therefore, it is necessary to perform the displacement operation of the gripping part and the connection operation of the battery pack. Further, when removing the battery pack from the vehicle body, in addition to the unloading operation of the battery pack and the moving operation of the battery pack, the operator performs the disconnecting operation and gripping of the battery pack to enable the moving operation of the battery pack. It is necessary to perform the displacement operation of the part. As a result, it is troublesome to load and unload the battery pack on the vehicle body.
In addition, it is necessary to provide a rotation shaft and a lock mechanism in order to enable the displacement operation of the grip portion. Further, in order to enable the battery pack to be loaded and unloaded, it is necessary to include a battery side bracket, a vehicle body side bracket, and a locking shaft for connecting these brackets. And since loading of the battery pack with respect to a vehicle body is performed by rotation operation, it is necessary to provide a buffer part on the vehicle body side. As a result, the number of parts required for loading and unloading the battery pack increases, resulting in a complicated configuration and an increase in cost.

  That is, it is desired to facilitate loading and unloading of the battery pack with respect to the vehicle body while simplifying the configuration and reducing costs.

As means for solving the above problems,
An electric work vehicle according to the present invention includes a battery storage unit and a battery pack that is detachably attached to the battery storage unit,
The battery storage unit includes a guide unit that guides the battery pack over a loading position where the battery pack is loaded and unloaded with respect to the battery storage unit, and a storage position where the battery pack is stored.
The battery pack includes a plurality of wheels for movement, a handle disposed at a rear portion of the battery pack, and a guided unit guided by the guide unit,
The guide unit and the guided unit include a pair of rollers on one of them, and a pair of engaging portions that engage with the rollers on the other of them,
When the battery pack is unloaded at the unloading position, the pair of rollers are engaged with the pair of engaging portions to enable the battery pack to be unloaded and swung with respect to the battery storage portion. Functions as a rocking fulcrum.

According to this means, when loading the battery pack into the storage position, the operator first performs a first movement operation of grasping the handle and moving the battery pack to the unloading position. Next, after holding the handle and performing an engaging operation to engage each roller and each engaging portion at the unloading position, the load swing operation of the battery pack using each roller as a swing fulcrum is performed. Do. Thereafter, a second movement operation is performed in which the battery pack is moved from the loading / unloading position to the storage position while releasing the engagement between the rollers and the engaging portions under the guidance of the guide unit. Thereby, the battery pack can be loaded into the storage position.
Further, when the operator takes out the battery pack from the storage position, first, the guide unit guides the third movement to engage each roller and each engagement portion while moving the battery pack from the storage position to the unloading position. Perform the operation. Next, at the unloading position, the battery pack is unloaded and swung by holding the handle and using each roller as a rocking fulcrum. Thereafter, in a state where the handle is grasped, an engagement release operation for releasing the engagement between each roller and each engagement portion is performed, and then a fourth movement operation for moving the battery pack from the unloading position is performed. Thereby, the battery pack can be taken out of the vehicle from the storage position.
In other words, in addition to the right and left wheels and the handle for movement, the guide unit and the guided unit are provided, so that the operator can perform the first movement operation, the engagement operation, the loading swing operation, and the second operation described above. By performing the moving operation, the battery pack can be loaded into the storage position. Further, the battery pack can be taken out from the storage position by performing the third movement operation, the unloading swing operation, the engagement release operation, and the fourth movement operation described above.
Further, when the operator performs the loading swing operation or the unloading swing operation, it is possible to avoid the possibility that the battery pack is displaced to the outside of the vehicle body by its own weight due to the engagement between each roller and each engagement portion. . This eliminates the need for the operator to manually prevent displacement of the battery pack toward the outside of the vehicle body due to the weight of the battery pack when performing the loading swinging operation or the unloading swinging operation.
As a result, the battery pack can be easily loaded and unloaded from the vehicle body while simplifying the configuration and reducing the cost.

As one of the means for making the present invention more suitable,
The guided unit includes left and right guided rails across the front and rear ends of the battery pack, and the pair of engaging portions are disposed on the lower surface of the front side of the left and right guided rails,
The guide unit includes a pair of rollers and a pair of guide rails for guiding the left and right guided rails.
The pair of rollers are arranged in a state in which the lower surfaces of the left and right guided rails are guided to the unloading position side of the battery storage portion,
The pair of guide rails includes a lower guide portion that guides the lower surfaces of the left and right guided rails, and an upper guide portion that guides the upper surfaces of the left and right guided rails, and stores the battery storage portion. On the position side, the battery pack is disposed in a state allowing swinging of the battery pack at the unloading position.

According to this means, when loading the battery pack into the storage position, the operator engages the left and right engaging portions with the pair of rollers in the above-described engaging operation. Then, after performing the above-described loading swing operation, the above-described second movement operation is started. Then, as the upper surface of each guided rail is guided to each upper guide portion, the downward swing of the battery pack using each roller as a swing fulcrum is prevented. Thereafter, when the second moving operation is completed, one end side of each guided rail is received and supported from below by each roller, and the other end side of each guided rail is received and supported from below by each lower guide portion. Become. As a result, the battery pack is positioned at the storage position in a state where movement from the storage position is suppressed.
Further, when the operator performs the above-described third movement operation when taking out the battery pack from the storage position, the upper surface of each guided rail guides to each upper guide portion until the battery pack reaches the unloading position. As a result, the battery pack is prevented from swinging downward with each roller as a swing fulcrum. When the battery pack reaches the loading / unloading position, the guide of each upper guide portion with respect to the upper surface of each guided rail is released, and the battery pack is allowed to swing downward. Thereby, the operator can perform the unloading swing operation described above.
In other words, while the battery pack moves between the loading and unloading positions, the upper guide portions prevent the battery pack from being lowered and swung, so that the operator can prevent the battery pack from being lowered and swung manually. There is no need to do it. And when a battery pack is located in a storage position, stability of a battery pack can be ensured.
As a result, it is possible to reduce the labor required for the operator to move the battery pack between the loading / unloading position and the storage position while ensuring the stability at the storage position of the battery pack.

As one of the means for making the present invention more suitable,
The guided unit includes left and right guided rails extending across the front and rear ends of the battery pack,
The pair of engaging portions are stepped portions formed on the front side lower surface of the left and right guided rails,
The guide unit includes a pair of first rollers for guiding the lower surfaces of the left and right guided rails, and a pair of second rollers for guiding the upper surfaces of the left and right guided rails,
The pair of first rollers are arranged on the loading / unloading position side of the battery storage portion in a state of functioning as the swing fulcrum,
The pair of second rollers are disposed at a position closer to the storage position than the pair of first rollers in the battery storage portion in a state of allowing the loading and unloading of the battery pack at the loading position.

According to this means, when the battery pack is loaded in the storage position, the operator engages the left and right engaging portions with the pair of first rollers in the above-described engaging operation. Then, after performing the above-described loading swing operation, the above-described second movement operation is started. Then, as the upper surface of each guided rail is guided by each second roller, the battery pack that uses each first roller as a swing fulcrum is prevented from swinging downward. Thereafter, when the second movement operation is completed, the battery pack is positioned at the storage position.
When the operator performs the above-described third movement operation when taking out the battery pack from the storage position, the upper surface of each guided rail guides to each second roller until the battery pack reaches the loading / unloading position. As a result, the battery pack is prevented from swinging downward with the first roller as a swing fulcrum. When the battery pack reaches the unloading position, the guide of each second roller with respect to the upper surface of each guided rail is released, and the battery pack is allowed to swing downward. Thereby, the operator can perform the unloading swing operation described above.
That is, while the battery pack moves between the unloading position and the storage position, the lowering and swinging of the battery pack is prevented by the action of each second roller, so that the operator manually prevents the lowering and swinging of the battery pack. There is no need to do it.
As a result, it is possible to reduce labor when the operator moves the battery pack between the unloading position and the storage position.

As one of the means for making the present invention more suitable,
The swing fulcrum is located near the center of gravity of the battery pack when the battery pack is loaded and unloaded.

  According to this means, it is possible to reduce labor when the operator performs the loading swing operation or the unloading swing operation of the battery pack at the unloading position.

As one of the means for making the present invention more suitable,
The plurality of wheels are a pair of left and right, a lower portion of the left and right wheels is located below the bottom surface of the battery pack, and a rear portion of the left and right wheels is located behind the rear surface of the battery pack In the lower end of the battery pack,
The handle extends above the battery pack from the rear of the battery pack.

According to this means, when the battery pack is removed from the vehicle body and stored in a predetermined storage position or charging position, the front lower end of the battery pack and the left and right wheels are grounded. Accordingly, it is possible to suppress the occurrence of inconvenience that the stored battery pack moves unexpectedly.
In addition, when performing the first movement operation or the fourth movement operation described above, the operator grasps the upper side of the handle and displaces it rearward and downward so that the front side of the battery pack is used as the fulcrum on the left and right wheels. Can float easily. This facilitates the first movement operation and the fourth movement operation performed by floating the front side of the battery pack.
Then, the operator lifts the front side of the battery pack when performing the first movement operation and the fourth movement operation, so that the transition from the first movement operation to the engagement operation described above and the engagement described above are performed. It becomes easy to shift from the release operation to the fourth movement operation.
As a result, unexpected movement of the battery pack in the storage state can be suppressed while the battery pack is more easily loaded and unloaded from the vehicle body.

As one of the means for making the present invention more suitable,
The handle includes a fixed portion fixed to the battery pack, and a movable portion displaceable with respect to the fixed portion,
The upper end of the fixing portion is located at the same height or substantially the same height as the upper end of the battery pack,
The movable portion is supported by the fixed portion so as to be displaceable between a use position positioned above the fixed portion and a storage position positioned at substantially the same height as the fixed portion.

According to this means, for example, when performing the above-described loading swinging operation or unloading swinging operation, if the operator displaces the movable part from the storage position to the use position, the battery pack extends upward from the upper end of the battery pack. The extension length of the handle becomes longer, and the distance from the swing fulcrum of the battery pack to the upper end of the handle becomes longer. Thereby, the operator can reduce the labor required for the loading / unloading swinging operation by grasping the upper end side of the handle.
In addition, for example, when the operator moves the movable part from the storage position to the use position when performing the first movement operation or the fourth movement operation with the front side of the battery pack floating, the operator moves from the upper end of the battery pack. The extension length of the handle extending upward is increased, and the distance from the left and right wheels to the upper end of the handle is increased. Thereby, the operator can reduce the labor required for these moving operations by grasping the upper end side of the handle.
For example, when the battery pack is stored in the battery storage unit, or when the battery pack is removed from the vehicle body and stored in a predetermined storage position or charging position, the operator moves the movable unit from the use position to the storage position. When displaced, the extension length of the handle extending upward from the upper end of the battery pack is shortened. Thereby, the arrangement space of the battery pack required for the battery storage unit or the storage location of the battery pack can be reduced.

As one of the means for making the present invention more suitable,
The battery pack includes a battery unit, a battery case in which the battery unit is housed, and a plurality of anti-vibration rubbers.
The plurality of anti-vibration rubbers are positioned between the battery case and the battery unit and support the anti-vibration of the battery unit.

According to this means, the battery unit is supported by the anti-vibration rubber in the battery case. Thereby, by the action of each anti-vibration rubber, the aforementioned first movement operation, engagement operation, loading swing operation, second movement operation, third movement operation, unloading swing operation, engagement release operation, or When the fourth movement operation is performed, vibration during the operation becomes difficult to be transmitted to the battery unit. Further, when the battery pack is stored in the battery storage unit, vibration during traveling or the like is not easily transmitted to the battery unit.
In other words, the anti-vibration support of the battery unit in the battery case prevents the battery unit from being protected regardless of whether each operation relating to the attachment / detachment of the battery pack is performed or when the battery pack is stored in the battery storage unit. Shaking can be suitably performed.
As a result, it is possible to avoid the possibility that vibrations such as when attaching and detaching and traveling will adversely affect the battery unit.

As one of the means for making the present invention more suitable,
The battery pack includes a plurality of first vibration isolation rubbers disposed between a bottom plate of the battery case and a bottom surface of the battery unit, a rear plate of the battery case, and the battery unit. And a plurality of second anti-vibration rubbers disposed between the rear surface and the rear surface.

According to this means, for example, when the battery pack is lifted forward in the first moving operation, the fourth moving operation, the loading swinging operation, or the unloading swinging operation described above, the battery unit is placed in the battery case. The first anti-vibration rubber and the second anti-vibration rubber can stably support the anti-vibration.
Thereby, it is possible to support the battery unit with high stability while making it difficult for vibration generated during these operations to be transmitted to the battery unit.

It is a left view of an electric mower. It is a top view of an electric mower. It is a rear view of an electric mower. FIG. 4 is a longitudinal left side view of the rear portion of the vehicle body showing the configuration of the battery storage unit and the battery pack, and showing the swinging state of the battery pack loaded and unloaded at the battery pack loading position. FIG. 4 is a longitudinal left side view of the rear portion of the vehicle body showing the configuration of the battery storage unit and the battery pack and the moving state between the battery pack loading / unloading position and the storage position with respect to the battery storage unit. It is a vertical left side view of the rear part of the vehicle body showing the configuration of the battery storage unit and the battery pack and the storage state of the battery pack in the battery storage unit. It is a vertical front view of the vehicle body rear part which shows the structure of a battery accommodating part and a battery pack. It is a vertical front view of the battery accommodating part which shows structures, such as a guide unit and a guided unit. It is a cross-sectional plan view of the left side in the battery accommodating part which shows structures, such as a guide unit and a guided unit. It is a partial longitudinal cross-sectional perspective view which shows the structure of a battery accommodating part and a battery pack. It is a left view of a battery pack. It is a rear view of a battery pack. It is a vertical left side view of the battery pack showing the configuration of the battery pack and the attachment position of the vibration isolating rubber. It is a perspective view of the principal part which shows the structure of a support frame, and the attachment position of vibration proof rubber. FIG. 5 is a longitudinal left side view of a main part showing a configuration of a guide unit and a guided unit in another embodiment and showing a swinging state of the battery pack in a loading / unloading position with respect to a battery storage unit. It is a vertical left side view of the principal part which shows the structure of the guide unit and guided unit in another embodiment, and the movement state over the battery pack loading and unloading position and the storage position.

Hereinafter, as an example of an embodiment for carrying out the present invention, an embodiment in which the present invention is applied to an electric mower as an example of an electric work vehicle will be described with reference to the drawings.
1 is the front side of the electric mower, and the direction indicated by the arrow U is the upper side of the electric mower.
2 is the front side of the electric mower, and the direction indicated by the arrow R is the right side of the electric mower.

  As shown in FIGS. 1 to 3, the electric mower illustrated in the present embodiment includes a riding-type traveling vehicle body 1, and a mower unit 2 that is suspended and supported so as to be movable up and down at the front and rear middle lower portions of the traveling vehicle body 1, Etc.

  The traveling vehicle body 1 includes a vehicle body frame 3 that forms the framework of the traveling vehicle body 1, caster-type left and right front wheels 4, left and right rear wheels 5 that can be driven independently of each other, left and right fenders 6 that cover the left and right rear wheels 5, 1, a boarding type driving unit 7 disposed on the front side of the vehicle 1, a battery storage unit 8 disposed at the rear of the traveling vehicle body 1, a battery pack 9 removably attached to the battery storage unit 8, and left and right traveling 1 electric motor 10, left and right first electric motor 10 and left and right gear-type reduction gears 11 that decelerate and transmit to left and right rear wheels 5, and left and right first electric motors 10 and other electronic control units (hereinafter referred to as ECU) 12), and a parallel link type link mechanism 13 that suspends and supports the mower unit 2 so as to be lifted and lowered.

  As shown in FIGS. 1 to 7, the vehicle body frame 3 includes left and right side members 14, a boarding step 15 installed on the front side of the left and right side members 14, and a cross installed on the rear side of the left and right side members 14. Members 16, left and right first brackets 17 connected to the rear side of left and right side members 14, left and right second brackets 18 extending upward from the rear side of left and right side members 14, and left and right second brackets 18 A supported arch-shaped protective frame 19 is provided.

  As shown in FIGS. 1 to 6, the left and right front wheels 4 are supported by the front end portions of the left and right side members 14 so as to be changeable in direction. The left and right rear wheels 5 are mounted on the output shaft 20 of the left and right gear-type reduction gears 11 so as to be integrally rotatable. The left and right gear speed reducers 11 are connected to the left and right first brackets 17. The left and right first electric motors 10 are connected to the input portions of the left and right gear speed reducers 11.

  As shown in FIGS. 1 to 3, the driving unit 7 includes a key switch 21 for intermittently supplying power from the battery pack 9 to the ECU 12, a driving seat 22 supported at the front and rear intermediate portions of the vehicle body frame 3, and left and right of the driving seat 22. The left and right speed change levers 23 disposed on both sides and the lift pedal 24 disposed on the foot portion of the driving unit 7 are provided.

  The left and right speed change levers 23 are swing-operated, and their operation positions are input to the ECU 12 via left and right lever sensors (not shown). The ECU 12 performs travel control that controls the outputs of the left and right first electric motors 10 based on inputs from the left and right lever sensors. By this traveling control, the operator swings the left and right speed change levers 23 to change the traveling state of the traveling vehicle body 1 so that the left and right rear wheels 5 are driven to rotate forward at a constant speed. A forward turning state in which the wheels 5 are driven to rotate forward at different speeds, a rearward straight traveling state in which the left and right rear wheels 5 are driven in reverse rotation at a constant speed, a reverse turning state in which the left and right rear wheels 5 are driven in reverse rotation at different speeds, left and right one While the rear wheel 5 is stopped driving, it is switched between a pivot turning state in which the other left and right rear wheels 5 are driven to rotate forward or reverse, and a spin turning state in which the left and right rear wheels 5 are driven to rotate in different directions. be able to.

  As shown in FIG. 1, the lift pedal 24 is linked to the link mechanism 13. By this linkage, the operator can raise the mower unit 2 to the upper retreat position by depressing the lift pedal 24. In addition, the operator can lower the mower unit 2 to the lower work position by releasing the depression operation of the lift pedal 24.

As shown in FIGS. 1 to 10, the battery storage unit 8 includes a support unit 30 that supports the battery pack 9, a rear-opening type battery cover 31 that is supported by the vehicle body frame 3 so as to swing up and down, and the like. ing. The support unit 30 includes a bottom plate 32, left and right side plates 33, and a front plate 34 to form a recessed space 35 for storing a battery pack. The battery cover 31 includes a first cover member 36 that covers the upper side of the battery pack 9 and a second cover member 37 that covers the rear side of the battery pack 9. The first cover member 36 and the second cover member 37 integrally swing over a lower closed position and an upper open position.
With the above configuration, the battery storage unit 8 is configured such that the battery pack 9 is unloaded from the rear of the traveling vehicle body 1.

  As shown in FIGS. 1 to 14, the battery pack 9 includes a rechargeable battery unit 40, a battery case 50 in which the battery unit 40 is stored, and the like. The battery unit 40 includes a plurality of battery modules 41 having a plurality of battery cells (not shown), a battery management unit 42 that monitors the state of each battery cell and controls output, a junction box 43, and supports these. A support frame 44, a wire harness 45 having a power line, a communication line, and the like, and a connector 46 detachably connected to the connector 25 on the vehicle body side. The battery case 50 is dustproof and waterproof. The wire harness 45 and the connector 46 are connected to the connector 25 on the vehicle body side through an opening 34 </ b> A formed in the front plate 34 of the support unit 30. The vehicle body side connector 25 is disposed on an upper part of the ECU 12 disposed below the driver seat 22.

As shown in FIGS. 4 to 13, the battery case 50 includes a storage case 51 whose top is opened, and a storage cover 52 that is detachably attached to the top of the storage case 51.
This facilitates the storage of the battery unit 40 in the battery case 50.

  As shown in FIGS. 6 to 13, the storage case 51 includes a bottom plate 53, left and right side plates 54, a front plate 55 and a rear plate 56 to form a storage space 57 for the battery unit. The storage case 51 includes reinforcing members 58 that extend upward from the four corners of the bottom plate 53.

  As shown in FIGS. 1 to 14, the battery pack 9 includes a plurality of battery modules 41, so that it can store an amount of power that enables a long-time mowing operation, but is heavier. Therefore, in order to facilitate the movement of the heavy battery pack 9, left and right wheels 60 for movement are arranged at the bottom of the battery pack 9, and a handle 61 is arranged at the rear of the battery pack 9.

  As shown in FIGS. 1 to 3, the mower unit 2 is disposed between the left and right front wheels 4 and the left and right rear wheels 5. The mower unit 2 includes a plurality of blades 70 that are rotationally driven, a housing 71 that covers each blade 70 from above, a second electric motor 72 that is supported by the rear of the housing 71, and each blade 70 that is supported by the second electric motor 72. A belt-type transmission device (not shown) that transmits power to the motor, a transmission cover 73 that covers the second electric motor 72 and the belt-type transmission device, and the like. The second electric motor 72 is supplied with power from the battery pack 9.

As shown in FIGS. 4 to 13, the battery storage unit 8 includes an unloading position (see FIG. 4) where the battery pack 9 is unloaded from the battery storage unit 8, and a storage position where the battery pack 9 is stored (see FIG. 6). ), A guide unit 80 for guiding the battery pack 9 is provided. The battery pack 9 includes a guided unit 90 guided by the guide unit 80. The guide unit 80 includes left and right rollers 81. The guided unit 90 includes left and right engaging portions 91 that engage with the left and right rollers 81. Each roller 81 engages with each engaging portion 91 when the battery pack 9 is unloaded at the unloading position so that the roller 81 can swing and unload the battery pack 9 with respect to the battery storage portion 8. Function as.
With the above configuration, when loading the battery pack 9 into the storage position, the operator first opens the battery cover 31 to open the recessed space 35 for storing the battery pack, and then grasps the handle 61 to hold the battery pack. A first movement operation for moving the pack 9 to the unloading position is performed. Next, in a state where the handle 61 is grasped, an engaging operation for engaging each engaging portion 91 with each roller 81 at the unloading position is performed, and then the battery pack 9 is loaded with each roller 81 as a swing fulcrum. Perform rocking operation. Thereafter, a second movement operation for moving the battery pack 9 from the loading / unloading position to the storage position while releasing the engagement between the rollers 81 and the engaging portions 91 is performed by guiding the guide unit 80. Thereby, the battery pack 9 can be loaded into the storage position.
Further, when the operator takes out the battery pack 9 from the storage position, first, the battery cover 31 is opened to open the recessed space 35 for storing the battery pack, and then the battery pack 9 is guided by the guide unit 80. A third movement operation for engaging each engaging portion 91 with each roller 81 is performed while moving 9 from the storage position to the unloading position. Next, at the unloading position, the handle 61 is grasped and the unloading operation of the battery pack 9 using the rollers 81 as the swing fulcrum is performed. Thereafter, in a state where the handle 61 is grasped, an engagement release operation for releasing the engagement between each engagement portion 91 and each roller 81 is performed, and then a fourth movement operation for moving the battery pack 9 from the unloading position is performed. . Thereby, the battery pack 9 can be taken out of the vehicle from the storage position.
That is, by providing the guide unit 80 and the guided unit 90 in addition to the left and right wheels 60 and the handle 61 for movement, the operator can perform the opening operation, the first movement operation, the engagement operation, and the load described above. By performing the stack swing operation and the second movement operation, the battery pack 9 can be loaded into the storage position. Further, the battery pack 9 can be taken out from the storage position by performing the opening operation, the third movement operation, the unloading swing operation, the engagement release operation, and the fourth movement operation described above.
Further, when the operator performs the loading swing operation or the unloading swing operation, it is possible to avoid the possibility that the battery pack 9 is displaced to the outside of the vehicle body by its own weight due to the engagement between each roller 81 and each engagement portion 91. be able to. This eliminates the need for the operator to manually inhibit the displacement of the battery pack 9 toward the outside of the vehicle body due to the weight of the battery pack 9 when performing the loading swinging operation or the unloading swinging operation.
As a result, the battery pack 9 can be easily loaded and unloaded from the vehicle body while simplifying the configuration and reducing the cost.

As shown in FIGS. 4 and 5, the left and right rollers 81 serving as the swing fulcrum described above are located near the center of gravity of the battery pack 9 when the battery pack 9 is loaded and unloaded.
Thereby, it is possible to reduce labor when the operator performs the loading swing operation or the unloading swing operation of the battery pack 9 at the unloading position.

  As shown in FIGS. 4 to 6 and FIG. 10, the unloading position is set at the rear end of the battery storage unit 8. The storage position is set on the front side of the battery storage unit 8 adjacent to the ECU 12. The support unit 30 has a short extension length to the rear of the bottom plate 32 in order to avoid contact with the bottom of the battery pack 9 that is swung up and down at the unloading position. The support unit 30 includes a recess 33 </ b> A on the lower rear side of the left and right side plates 33 in order to avoid contact with the left and right wheels 60 of the battery pack 9 loaded in the storage position.

As shown in FIGS. 4 to 13, the guided unit 90 includes left and right guided rails 92 across the front and rear ends of the battery pack 9, and the left and right engaging portions 91 described above are arranged in front of each guided rail 92. It is arranged on the lower surface on the part side. The guide unit 80 includes the left and right rollers 81 described above and the left and right guide rails 82 that guide the left and right guided rails 92. Each roller 81 is arranged in a state in which the lower surface of each guided rail 92 is guided to the unloading position side of the battery storage unit 8. Each guide rail 82 includes a lower guide portion 82 </ b> A that guides the lower surface of each guided rail 92 and an upper guide portion 82 </ b> B that guides the upper surface of each guided rail 92. In addition, the battery pack 9 is disposed in a state that allows unloading and swinging at the unloading position.
With the above configuration, when loading the battery pack 9 into the storage position, the operator performs the above-described engagement operation and the loading swing operation, and then starts the above-described second movement operation. Then, as the upper surface of each guided rail 92 is guided to each upper guide portion 82B, the downward swing of the battery pack 9 using each roller 81 as a swing fulcrum is prevented. Thereafter, when the second moving operation is completed, the rear side of each guided rail 92 is received and supported from below by each roller 81, and the front side of each guided rail 92 is received and supported from below by each lower guide portion 82A. It will be in the state. As a result, the battery pack 9 is positioned at the storage position in a state where movement from the storage position is suppressed.
When the battery pack 9 is taken out from the storage position, if the operator performs the above-described third movement operation, the upper surface of each guided rail 92 remains on each upper guide portion until the battery pack 9 reaches the unloading position. By being guided by 82B, the battery pack 9 is prevented from swinging downward with each roller 81 as a swing fulcrum. When the battery pack 9 reaches the loading / unloading position, the guide of each upper guide portion 82B with respect to the upper surface of each guided rail 92 is released, and the battery pack 9 is allowed to swing downward. Thereby, the operator can perform the unloading swing operation described above.
That is, while the battery pack 9 moves between the loading and unloading positions and the storage position, the battery pack 9 is prevented from swinging downward by the action of the upper guide portions 82B. It is no longer necessary to stop this by human power. When the battery pack 9 is located at the storage position, the stability of the battery pack 9 can be ensured.
As a result, it is possible to reduce the labor when the operator moves the battery pack 9 between the loading position and the storage position while ensuring the stability of the battery pack 9 at the storage position.

  As shown in FIGS. 7 and 9, each lower guide portion 82 </ b> A is formed with a notch 82 a for avoiding contact with the left and right engaging portions 91.

  As shown in FIGS. 4 to 6, 9 and 10, the left and right rollers 81 are supported on the rear side of the left and right side plates 33 in the support unit 30. The left and right guide rails 82 are supported on the front side of the left and right side plates 33.

As shown in FIGS. 4 to 7 and 10, in the left and right guide rails 82, the rear end portion of the upper guide portion 82 </ b> B is inclined upward.
Thus, even if the operator starts the second movement operation just before the loading swing operation at the unloading position is completed, each guided rail 92 is moved to each guide rail by the rear end portion of each upper guide portion 82B. It is possible to reliably guide to the 82 guide areas.
As a result, the battery pack 9 can be more easily loaded on the vehicle body.

As shown in FIGS. 4 to 13, the left and right guided rails 92 and the left and right engaging portions 91 are provided on the left and right outer surfaces of the battery case 50.
This makes it easy for the operator to visually recognize when the left and right guided rails 92 and the left and right engaging portions 91 are aligned with the left and right rollers 81, and facilitates the loading operation of the battery pack 9.

As shown in FIGS. 4 to 6, FIGS. 9 to 11, and FIG. 13, the left and right guided rails 92 have front and rear lengths across the front and rear ends of the battery case 50.
Accordingly, the left and right guided rails 92 can be used as reinforcing members that reinforce the left and right side portions of the battery case 50. As a result, the strength of the battery case 50 can be increased while simplifying the configuration.

As shown in FIGS. 4 to 13, the left and right guided rails 92 include resin-made end members 93 at both front and rear ends thereof. In the second moving operation and the third moving operation described above, each guided rail 92 is guided by each roller 81 and each front end member 93 is guided by each guide rail 82. When the battery pack 9 is located at the storage position, the rear side of each guided rail 92 is received and supported from below by the rollers 81, and the front end members 93 are provided on the lower guide portions 82A of the guide rails 82. And is supported from below.
Thereby, stability at the storage position of the battery pack 9 can be ensured while the second movement operation and the third movement operation can be performed smoothly.

As shown in FIGS. 1 to 8 and FIGS. 11 to 13, the left and right wheels 60 are such that the lower portion of each wheel 60 is positioned below the bottom surface of the battery pack 9 (the bottom surface of the battery case 50). The rear portion of the battery pack 9 is disposed below the rear end of the battery pack 9 in a state where the rear portion is located behind the rear surface of the battery pack 9 (the back surface of the battery case 50). The handle 61 extends from the rear part of the battery pack 9 to the upper side of the battery pack 9.
With the above configuration, when the battery pack 9 is removed from the vehicle body and stored in a predetermined storage position or charging position, the front lower end of the battery pack 9 and the left and right wheels 60 are grounded. Thereby, it is possible to suppress the occurrence of inconvenience that the stored battery pack 9 moves unexpectedly.
Further, when the worker performs the first movement operation or the fourth movement operation described above, the operator grasps the upper side of the handle 61 and displaces the handle 61 rearward and downward, thereby moving the front side of the battery pack 9 left and right. The wheel 60 can be easily floated using the wheel 60 as a fulcrum. Thereby, it becomes easy to perform the first movement operation and the fourth movement operation performed by floating the front side of the battery pack 9.
Then, the operator floats the front side of the battery pack 9 when performing the first movement operation and the fourth movement operation, so that the shift from the first movement operation to the engagement operation described above and the above-described engagement are performed. It becomes easier to perform the transition from the match release operation to the fourth movement operation.
As a result, unexpected movement of the battery pack 9 in the storage state can be suppressed while the battery pack 9 is more easily loaded and unloaded from the vehicle body.

4 to 7 and FIGS. 11 to 13, the handle 61 is telescopic and has left and right fixing parts 61 </ b> A that are fixed to the battery pack 9, and an arcuate shape that can slide and displace with respect to the fixing part 61 </ b> A. And a movable portion 61B. Each fixing portion 61 </ b> A has an upper end located substantially at the same height as the upper end of the battery pack 9. The movable portion 61B is supported by each fixed portion 61A so as to be displaceable between a use position positioned above each fixed portion 61A and a storage position positioned substantially at the same height as each fixed portion 61A.
With the above configuration, for example, when the operator performs sliding loading operation or unloading swinging operation described above, when the operator slides and moves the movable portion 61B from the storage position to the use position, the upper end of the battery pack 9 is moved. The extension length of the handle 61 extending upward is increased, and the distance from the swing fulcrum of the battery pack 9 to the upper end of the handle 61 is increased. Thereby, the operator can reduce the labor required for the loading / unloading swing operation of the battery pack 9 by grasping the upper end side of the handle 61.
For example, when the operator performs the first movement operation or the fourth movement operation with the front side of the battery pack 9 floating, if the operator slides and moves the movable part 61B from the storage position to the use position, the battery The extension length of the handle 61 extending upward from the upper end of the pack 9 is increased, and the distance from the left and right wheels 60 to the upper end of the handle 61 is increased. Thereby, the operator can reduce the labor required for these moving operations by grasping the upper end side of the handle 61.
For example, when the battery pack 9 is stored in the battery storage unit 8 or when the battery pack 9 is removed from the vehicle body and stored in a predetermined storage position or charging position, the operator uses the movable unit 61B. The sliding length of the handle 61 extending upward from the upper end of the battery pack 9 is shortened when the battery 61 is slid to the retracted position. Thereby, the arrangement space of the battery pack 9 required in the storage place of the battery storage part 8 or the battery pack 9 can be reduced.

Although not shown, the battery storage unit 8 includes a battery cover 31 provided with a fixture for fixing the battery pack 9 in the storage position. When the battery cover 31 is closed, the fixture comes into contact with the battery pack 9 at the storage position, thereby preventing displacement of the battery pack 9 from the storage position.
Thereby, the operator can fix the battery pack 9 to the storage position by performing the closing operation of the battery cover 31 after loading the battery pack 9 in the storage position. As a result, it is possible to avoid the possibility that the battery pack 9 is displaced from the storage position due to vibration during traveling.

As shown in FIGS. 8, 9, 13, and 14, the battery pack 9 includes eight vibration isolation rubbers 62. Each anti-vibration rubber 62 is positioned between the battery case 50 and the battery unit 40 and supports the anti-vibration of the battery unit 40.
With the above configuration, the battery unit 40 is supported by the anti-vibration rubber 62 in the battery case. Thereby, due to the action of each anti-vibration rubber 62, the aforementioned first movement operation, engagement operation, loading swing operation, second movement operation, third movement operation, unloading swing operation, engagement release operation, Alternatively, when the fourth movement operation is performed, vibration during the operation is not easily transmitted to the battery unit 40. Further, when the battery pack 9 is stored in the battery storage unit 8, vibration during traveling or the like is not easily transmitted to the battery unit 40.
That is, the battery unit 40 is supported in an anti-vibration manner in the battery case, so that regardless of whether each operation related to the attachment / detachment of the battery pack 9 is performed or when the battery pack 9 is stored in the battery storage unit 8, The vibration isolation of the battery unit 40 can be suitably performed.
As a result, it is possible to avoid the possibility that vibrations such as when attaching and detaching and traveling will adversely affect the battery unit 40.

Each anti-vibration rubber 62 is positioned between the battery case 50 and the support frame 44 of the battery unit 40 and supports the anti-vibration of the battery unit.
As a result, the number of anti-vibration rubbers 62 required for anti-vibration support is reduced compared to the case where each battery module 41 of the battery unit 40, the management unit 42, and the junction box 43 are individually anti-vibration supported. be able to. And each battery module 41 and the management unit 42 can be connected in a state where relative displacement does not occur between them.
As a result, each battery module 41 and the management unit 42 can be well connected while reducing the cost related to the vibration-proof support of the battery unit 40 and improving the assembly.

The battery pack 9 includes four first vibration isolation rubbers 62 </ b> A disposed between the bottom plate 53 of the battery case 50 and the bottom surface of the battery unit 40 as the vibration isolation rubber 62 described above, and a rear plate 56 of the battery case 50. And four second anti-vibration rubbers 62 </ b> B disposed between the battery unit 40 and the back surface of the battery unit 40.
With the above configuration, for example, when the battery pack 9 rises forward in the first movement operation, the fourth movement operation, the loading swing operation, or the unloading swing operation described above, the battery unit 40 is connected to the battery unit 40. The first anti-vibration rubber 62A and the second anti-vibration rubber 62B in the case can stably support the anti-vibration.
Accordingly, it is possible to support the battery unit 40 with high stability while making it difficult for vibrations generated during these operations to be transmitted to the battery unit 40.

  The support frame 44 of the battery unit 40 includes a rectangular left and right first member 47 and a plurality of second members 48 that are installed on the left and right first members 47. The support frame 44 supports the management unit 42 and the junction box 43 by front and rear second members 48 disposed on the upper portion thereof.

  Each first anti-vibration rubber 62 </ b> A is attached to both front and rear ends of the bottom surface of the left and right first members 47. Each of the second anti-vibration rubbers 62 </ b> B is attached to the upper and lower ends of the back surface of the left and right first members 47.

[Another embodiment]
The present invention is not limited to the configuration exemplified in the above-described embodiment, and typical other embodiments relating to the present invention will be exemplified below.

Various changes can be made to the configuration of the electric work vehicle.
[1] For example, the electric work vehicle may include the battery storage unit 8 at the front portion of the traveling vehicle body 1 and the driving unit 7 at the rear side of the traveling vehicle body 1.
[2] For example, the electric working vehicle may include the traveling left and right first electric motors 10 and the working second electric motor 72 in the traveling vehicle body 1.
[3] For example, the electric work vehicle may be provided with a single electric motor for both traveling and working in the traveling vehicle body 1.
[4] For example, the electric work vehicle may include left and right front wheels 4 that can be steered, a steering wheel for front wheel steering, and the like.
[5] For example, the electric work vehicle may be configured in a semi-crawler specification including left and right crawlers instead of the left and right rear wheels 5.
[6] For example, the electric work vehicle may be configured in a full crawler specification including left and right crawlers instead of the left and right front wheels 4 and the left and right rear wheels 5.
[7] For example, the electric work vehicle may be an electric front mower in which the mower unit 2 is connected to the front portion of the traveling vehicle body 1 so as to be movable up and down.
[8] For example, the electric work vehicle may be an electric mower provided with a grass collection container for storing mowing grass.

Various changes can be made to the configuration of the battery storage unit 8.
[1] For example, the battery storage unit 8 may be configured such that the battery pack 9 is unloaded from the front of the traveling vehicle body 1. The battery storage unit 8 may be configured such that the battery pack 9 is unloaded from the lateral side of the traveling vehicle body 1.
[2] For example, the battery storage unit 8 may include a front opening type battery cover 31 or a lateral opening type battery cover 31 according to the loading and unloading direction of the battery pack 9.
[3] For example, the battery housing 8 may include a battery cover 31 that is detachably supported by the vehicle body frame 3.
[4] For example, the battery storage unit 8 is a fixing band that is detachably attached to the battery storage unit 8 in a state in which the battery pack 9 is received and held in the storage position as a fixing tool that fixes the battery pack 9 in the storage position. A detachable connector for connecting the battery pack 9 at the position to the support unit 30 or the like, or engaging with the left and right rollers 81 as the battery pack 9 is loaded into the storage position, from the storage position of the battery pack 9 There may be provided a stopper or the like for preventing the displacement.
[5] For example, the battery storage unit 8 may include two sets of guide units 80 arranged side by side to store two battery packs 9 having a narrow width side by side.

Various changes can be made to the configuration of the battery pack 9.
[1] For example, the battery pack 9 may include a plurality of unitized battery modules 41, a battery management unit 42, and a junction box 43 that are individually supported in a vibration-proof manner inside the battery case 50. Good.
[2] For example, the battery pack 9 is configured such that a plurality of anti-vibration rubbers 62 are provided on the bottom surface of the battery case 50 and are anti-vibrated and supported by the battery storage unit 8 via the plurality of anti-vibration rubbers 62 at the storage position. It may be.
[3] For example, the battery pack 9 includes a plurality of first vibration isolation rubbers 62 </ b> A disposed between the bottom plate 53 of the battery case 50 and the bottom surface of the battery unit 40, the rear plate 56 of the battery case 50, and the battery unit 40. A plurality of second anti-vibration rubbers 62B disposed between the back surface of the battery case 50 and a plurality of third anti-vibration rubbers disposed between the front plate 55 of the battery case 50 and the front surface of the battery unit 40. May be.
[4] For example, the battery pack 9 may have a configuration in which the battery unit 40 is supported on the battery case 50 by vibration isolation via a plurality of vibration isolation rubbers 62 attached to the battery case 50.
[5] For example, the battery pack 9 may include a single front wheel 60 and left and right rear wheels 60 as the plurality of moving wheels 60. The battery pack 9 may include left and right front wheels 60 and left and right rear wheels 60 as the plurality of moving wheels 60.
[6] For example, the battery pack 9 may be of a folding type in which the handle 61 includes a fixed portion 61A that is fixed to the battery pack 9 and a movable portion 61B that can swing and displace relative to the fixed portion 61A. .
[7] For example, in the battery pack 9, the fixing portion 61 </ b> A of the handle 61 may be arranged at a position where the upper end of the handle 61 is the same height as the upper end of the battery pack 9.
[8] For example, the battery pack 9 may be supported by the battery pack 9 such that the entire handle 61 is displaced with respect to the battery pack 9.
[9] For example, the battery pack 9 may be configured as shown in FIGS. 15 and 16.
In the configuration shown in FIGS. 15 and 16, the left and right rubber grounding members 94 that are grounded when the battery pack 9 is removed from the vehicle body and stored at a predetermined storage position or charging position at the front lower end thereof. It has.
With this configuration, when the battery pack 9 is removed from the vehicle body and stored in a predetermined storage position or charging position, the left and right ground members 94 and the left and right wheels 60 of the battery pack 9 are grounded. Accordingly, it is possible to more reliably suppress the occurrence of inconvenience that the stored battery pack 9 moves unexpectedly.

The configurations of the guide unit 80 and the guided unit 90 can be variously changed.
[1] For example, in the guide unit 80 and the guided unit 90, the pair of rollers 81 and the pair of guide rails 82 are arranged on the bottom plate 32 of the support unit 30, and the left and right engaging portions 91 and the left and right guided rails 92 may be provided on the bottom surface of the battery case 50.
[2] For example, the guide unit 80 and the guided unit 90 include a left and right roller 81 that functions as a swing fulcrum that allows the battery pack 9 to be loaded and swung on the guided unit 90, and left and right guided rails. 92, and a pair of engaging portions 91 that engage with each roller 81, and a pair of guide rails 82 that guide the left and right rollers 81 and the left and right guided rails 92 are provided in the guide unit 80. May be.
[3] For example, the guide unit 80 and the guided unit 90 may be configured as shown in FIGS. 15 and 16.
In the configuration shown in FIGS. 15 and 16, the guided unit 90 includes left and right engaging portions 91 and left and right guided rails 92 across the front and rear ends of the battery pack 9. The left and right engaging portions 91 are step portions formed on the lower surface of the front side of the left and right guided rails 92. The guide unit 80 includes left and right first rollers 81 that guide the lower surfaces of the left and right guided rails 92 and left and right second rollers 83 that guide the upper surfaces of the left and right guided rails 92. The left and right first rollers 81 are arranged on the unloading position side of the battery storage unit 8 so as to function as a swing fulcrum that enables the battery pack 9 to be unloaded and swung. The left and right second rollers 83 are arranged at a position closer to the storage position than the left and right first rollers 81 in the battery storage unit 8 in a state that allows the loading and unloading of the battery pack 9 at the loading and unloading position.
With the above configuration, when loading the battery pack 9 into the storage position, the operator engages the left and right engaging portions 91 with the left and right first rollers 81 in the above-described engaging operation. Then, after performing the above-described loading swing operation, the above-described second movement operation is started. Then, as the upper surface of each guided rail 92 is guided by each second roller 83, the downward swing of the battery pack 9 using each first roller 81 as a swing fulcrum is prevented. Thereafter, when the second movement operation is completed, the battery pack 9 is positioned at the storage position.
Further, when the operator performs the above-described third movement operation when taking out the battery pack 9 from the storage position, the upper surface of each guided rail 92 remains in the second position until the battery pack 9 reaches the unloading position. By being guided by the rollers 83, the battery pack 9 is prevented from swinging downward with the first rollers 81 as swinging fulcrums. When the battery pack 9 reaches the unloading position, the guide of each second roller 83 with respect to the upper surface of each guided rail 92 is released, and the battery pack 9 is allowed to swing downward. Thereby, the operator can perform the unloading swing operation described above.
That is, while the battery pack 9 moves between the loading and unloading positions and the storage position, the lowering and swinging of the battery pack 9 is prevented by the action of each second roller 83, so that the operator can It is no longer necessary to stop this by human power.
As a result, the labor when the operator moves the battery pack 9 between the unloading position and the storage position can be reduced.
[4] For example, the guide unit 80 and the guided unit 90 may be configured such that the left and right rollers 81 serving as the swing fulcrum described above are positioned at the center of gravity of the battery pack 9 when the battery pack 9 is loaded and swung. Good.

  The present invention is applied to an electric work vehicle such as an electric mower, an electric tractor, an electric rice transplanter, and an electric carrier vehicle including a battery storage unit and a battery pack that is detachably attached to the battery storage unit. be able to.

DESCRIPTION OF SYMBOLS 8 Battery storage part 9 Battery pack 40 Battery unit 50 Battery case 53 Bottom plate 56 Rear plate 60 Wheel 61 Handle 61A Fixed part 61B Movable part 62 Anti-vibration rubber 62A 1st anti-vibration rubber 62B 2nd anti-vibration rubber 80 Guide unit 81 Roller ( (First roller)
82 Guide rail 82A Lower guide part 82B Upper guide part 83 Second roller 90 Guided unit 91 Engagement part 92 Guided rail

Claims (8)

A battery storage unit, and a battery pack detachably attached to the battery storage unit,
The battery storage unit includes a guide unit that guides the battery pack over a loading position where the battery pack is loaded and unloaded with respect to the battery storage unit, and a storage position where the battery pack is stored.
The battery pack includes a plurality of wheels for movement, a handle disposed at a rear portion of the battery pack, and a guided unit guided by the guide unit,
The guide unit and the guided unit include a pair of rollers on one of them, and a pair of engaging portions that engage with the rollers on the other of them,
When the battery pack is unloaded at the unloading position, the pair of rollers are engaged with the pair of engaging portions to enable the battery pack to be unloaded and swung with respect to the battery storage portion. Electric work vehicle that functions as a swing fulcrum. The guided unit includes left and right guided rails across the front and rear ends of the battery pack, and the pair of engaging portions are disposed on the lower surface of the front side of the left and right guided rails,
The guide unit includes a pair of rollers and a pair of guide rails for guiding the left and right guided rails.
The pair of rollers are arranged in a state in which the lower surfaces of the left and right guided rails are guided to the unloading position side of the battery storage portion,
The pair of guide rails includes a lower guide portion that guides the lower surfaces of the left and right guided rails, and an upper guide portion that guides the upper surfaces of the left and right guided rails, and stores the battery storage portion. 2. The electric work vehicle according to claim 1, wherein the electric work vehicle is disposed on a position side in a state in which the battery pack is allowed to swing and unload at the unloading position. The guided unit includes left and right guided rails extending across the front and rear ends of the battery pack,
The pair of engaging portions are stepped portions formed on the front side lower surface of the left and right guided rails,
The guide unit includes a pair of first rollers for guiding the lower surfaces of the left and right guided rails, and a pair of second rollers for guiding the upper surfaces of the left and right guided rails,
The pair of first rollers are arranged on the loading / unloading position side of the battery storage portion in a state of functioning as the swing fulcrum,
The pair of second rollers are disposed at a position closer to the storage position than the pair of first rollers in the battery storage portion in a state of allowing the loading and unloading of the battery pack at the loading position. Item 4. The electric work vehicle according to Item 1.   The electric work vehicle according to any one of claims 1 to 3, wherein the swing fulcrum is positioned near a center of gravity of the battery pack when the battery pack is loaded and unloaded. The plurality of wheels are a pair of left and right, a lower portion of the left and right wheels is located below the bottom surface of the battery pack, and a rear portion of the left and right wheels is located behind the rear surface of the battery pack In the lower end of the battery pack,
The electric work vehicle according to any one of claims 1 to 4, wherein the handle extends from a rear portion of the battery pack to an upper side than the battery pack. The handle includes a fixed portion fixed to the battery pack, and a movable portion displaceable with respect to the fixed portion,
The upper end of the fixing portion is located at the same height or substantially the same height as the upper end of the battery pack,
The said movable part is supported by the said fixing | fixed part so that a displacement to the use position located above the said fixing | fixed part and the storage position located in the substantially same height as the said fixing | fixed part is possible. The electric work vehicle according to claim 1. The battery pack includes a battery unit, a battery case in which the battery unit is housed, and a plurality of anti-vibration rubbers.
The electric work vehicle according to any one of claims 1 to 6, wherein the plurality of vibration-proof rubbers are positioned between the battery case and the battery unit to support the battery unit in a vibration-proof manner.   The battery pack includes a plurality of first vibration isolation rubbers disposed between a bottom plate of the battery case and a bottom surface of the battery unit, a rear plate of the battery case, and the battery unit. The electric work vehicle according to claim 7, further comprising a plurality of second vibration isolating rubbers disposed between the back surface of the electric work vehicle.

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