Abstract: An electric work vehicle includes: a carrier 32 in which a battery can be stored and a support portion 40 is provided; a carrier storage portion provided in a vehicle body and capable of holding the carrier 32; a guide portion 21, 22 that is capable of supporting, via the support portion 40, the carrier 32 operated so as to be lifted from the ground, in a state in which the carrier is lifted from the ground, and guiding the carrier 32 toward the carrier storage portion; and a positioning portion 42 configured to, when the carrier 32 placed on the ground is operated so as to be lifted and the support portion 40 has reached a position at which the support portion 40 can be supported by the guide portion 21, 22, stop the operation of lifting the carrier 32.

Abstract: An electric motor 15 includes a motor section 15b and an output shaft 15a protruding from the motor section 15b. The output shaft 15a supports a rotary fan 24. The rotary fan 24 is drivable by the output shaft 15a to rotate to supply cooling air to the motor section 15b.

Abstract: An electric work vehicle includes a vehicle body having traveling wheels, a traveling motor capable of driving the traveling wheels, and a battery unit having, at one end portion thereof, a pair of left and right leg wheels, the battery unit being detachably attachable to a battery storage section of the vehicle body and being capable of supplying electric power to the traveling motor. The battery unit, when detached from the battery storage section, is posture-switchable between a flat placement state in which the leg wheels and the other end portion thereof opposite to the side on which the leg wheels are located are placed in contact with the ground surface and a tilted posture in which the battery unit can stand on its own with the other end portion thereof being located higher than the leg wheels.

Abstract: A movement assisting tool (23) includes an attachment portion (24) that can be attached to and removed from a main body portion (11) of a battery unit (4), leg portions (25) that are coupled to the attachment portion (24) and extend from the attachment portion (24), and moving wheels (26) that are supported by extension portions of the leg portions (25). In a state where the attachment portion (24) has been attached to the main body portion (11) of the battery unit (4) and the moving wheels (26) are touching the ground, the battery unit (4) can be kept in an inclined orientation in which the wheels (13) are touching the ground and ground contact portions (14) are raised above the ground.

Abstract: Provided is a battery connector assembly that allows adaptation of a connector of a battery to both a connector of an electric work vehicle and a connector of a charger. The assembly includes, in a connector assembly box, a battery connecting connector removably connected to a battery side connector having a plurality of terminals to be connected to the battery a vehicle connecting connector removably connected to a vehicle side connector having a plurality of terminals to be connected to the electric work vehicle and a charger connecting connector removably connected to a charger side connector provided in a charger for charging power supplied from an external power source to the battery and having a plurality of terminals.

Abstract: Provided is a non-excitation operable electromagnetic brake that includes a manually operable rotary cam for switching over a rotor to a brake releasing state, but that allows easy recognition of switchover to the brake released state via an operation reaction force and that also allows reliable keeping of the rotary cam under its acting state. Even when an electromagnet is under a non-excited state, when a rotary cam is rotatably operated to an acting position, an acting portion of the rotary cam slidably operates a rotor via a releasing plate to a brake releasing state against springs. The acting portion of the rotary cam is formed linear along a tangent at a center of the acting portion with respect to a rotary cam rotational direction.

Abstract: A lawn mower includes a mower device provided between a pair of right and left front wheels and a pair of right and left rear wheels and configured to mow grass on a traveling land surface; a grass collecting container provided rearwardly of a vehicle body, a conveyer duct extending between the mower device and the grass collecting container as extending through between the pair of right and left rear wheels and configured to convey grass clippings discharged from the mower device to the grass collecting container; and a belt conveyer configured to convey the grass clippings discharged from the mower device toward the grass collecting container. The belt conveyer forms a conveying bottom face of the conveyer duct.

Abstract: A battery unit includes a positive relay switch, a negative relay switch, a first resistor disposed in a third wiring portion extending between a positive external terminal and a negative external terminal, a second resistor serially connected to a portion on more negative side than the first resistor, a third resistor disposed in a second wiring portion and connected in parallel with the negative relay switch, a potential difference detection section capable of detecting a first potential difference which is a potential difference between the portion of the third wiring portion on more negative side than the first resistor and a negative terminal and a failure determination section for determining a failure of the positive relay switch and the negative relay switch respectively, based on the first potential difference.

Abstract: An electric work vehicle includes a battery container provided in a traveling vehicle body and including a guiding unit, and a battery pack removably attached to the battery container and including a guided unit. A pair of rollers are provided in one of the guiding unit and the guided unit, and a pair of engaging portion to be engaged with the rollers are provided in the other of the guiding unit and the guided unit. When the battery pack is loaded or unloaded onto/from the battery container at the loading/unloading position, the rollers engage with the engaging portions, thereby functioning as pivot fulcrums for enabling the battery pack to pivot for loading and unloading.

Abstract: An electric work vehicle includes: a battery accommodating portion that is provided in the vehicle body and accommodates a battery; a first connector provided on the battery accommodating portion; a second connector provided on the battery; and an operating tool for moving the battery and the second connector, and switching from a pre-attachment orientation in which the second connector opposes the first connector to an attachment orientation in which the second connector is joined to the first connector.

Abstract: An electric work vehicle includes front wheels and rear wheels for traveling, right and left machine body frames extending along a front/rear direction and an electric motor. The electric motor includes at least one of a front output shaft protruding forwards and a rear output shaft protruding rearwards. The electric motor is supported to front portions of the machine body frames to be located forwardly of the front wheels as seen in a side view.

Abstract: A semiconductor device includes an n-type base substrate; a p-type first region; a p-type surface region having a plurality of second corner portions and a plurality of second side portions surrounding the first region. The p-type surface region has a dopant concentration lower than a dopant concentration of the first region. The semiconductor device further includes a field plate in a region overlapping with the surface region in a plan view by way of an insulation film. The field plate has a plurality of field plate corner portions and a plurality of field plate side portions. A relationship of L1>L2 is established at least at a portion of the surface region or a relationship of FP1>FP2 is established at least at a portion of the field plate is satisfied. A withstand voltage of the second side portion is lower than a withstand voltage of the second corner portion.

Abstract: Disclosed is a work vehicle management system including: a battery work information generation unit that generates battery work information indicating a use state of a battery during work of a work vehicle; a battery deterioration information generation unit that chronologically diagnoses the battery work information to generate battery deterioration information that indicates a deterioration trend of the battery that is unique to the work vehicle; and a notification unit that performs notification of the battery deterioration information to a manager of the work vehicle.

Abstract: In a work vehicle, a pivot axis of an operating lever and a rotary axis of a potentiometer are located on a same axis. An interlocking mechanism includes an input part which inputs power of the operating lever following the operating lever about the pivot axis as a pivot, and an output part which is supported to a rotary operation shaft and outputs power of the input part to the rotary operation shaft. The input part and the output part are operably connected via a connecting pin.

Abstract: An electric powered work vehicle is to be configured so that holding of the battery at the storage position can be carried out easily at the time of attachment of the battery. There is provided guide mechanism for movably guiding the battery while supporting it along a horizontal direction between a storage position and a detachment position located away from the storage position along the horizontal direction. There is provided a holding mechanism configured to be automatically operated to a holding state capable of holding the battery at the storage position when the battery is moved to the storage position along the guide mechanism. There is provided a releasing operational portion manually operable to render the holding mechanism to a releasing state for allowing movement of the battery to the detachment position.

Abstract: An electric work vehicle includes: a battery accommodating portion that is provided in the vehicle body and accommodates a battery; a first connector provided on the battery accommodating portion; a second connector provided on the battery; and an operating tool for moving the battery and the second connector, and switching from a pre-attachment orientation in which the second connector opposes the first connector to an attachment orientation in which the second connector is joined to the first connector.

Abstract: An electric work vehicle includes a battery container provided in a traveling vehicle body and including a guiding unit, and a battery pack removably attached to the battery container and including a guided unit. A pair of rollers are provided in one of the guiding unit and the guided unit, and a pair of engaging portion to be engaged with the rollers are provided in the other of the guiding unit and the guided unit. When the battery pack is loaded or unloaded onto/from the battery container at the loading/unloading position, the rollers engage with the engaging portions, thereby functioning as pivot fulcrums for enabling the battery pack to pivot for loading and unloading.

Abstract: Disclosed is an electric work vehicle that includes a traveling vehicle body, a wheel unit having wheels on the right and left sides of the traveling vehicle body, a motor for supplying rotational drive force to the wheel unit, and a battery for supplying electric power to the motor. The battery includes a first battery disposed at a right/left center of the traveling vehicle body, and second batteries disposed in right/left symmetricity on the traveling vehicle body to act as supplementary batteries.

Abstract: A battery pack includes a plurality of battery modules stacked with connecting terminals disposed at predetermined positions, a holding unit for holding the plurality of battery modules under the stacked state, a plurality of conducting paths connecting corresponding connecting terminals, and a substrate connected to the holding unit. The plurality of conducting paths are provided integrally in the substrate and disposed to connect the corresponding connecting terminals in association with connection of the substrate to the holding unit.

Abstract: In an electric work vehicle, a power feeding assembly which connects a battery device to a power controller unit so as to feed power includes a fixed connector which is fixed to the battery device and electrically connected to the battery device, a cable harness connected to a power controller unit, and a free connector which is connected to an end of the cable harness and connectable to a fixed connector, and a connecting operation tool is configured to be movable the free connector between the connecting position in which the free connector is connected to the fixed connector and the detaching position.