Kubota Corporation

Denso Corporation

Daikin Industries, Ltd.

Shinichi Kawabata

Hiroaki Nakagawa

Yuki Shimoike

Masahiko Nomura

Kazuto Okazaki

Yoshimitsu Inoue

Shigeki Hayashi

Sumio Yagyu

Masahiro Kuroda

Shizuo Demizu

Yoshihiro Takayama

Hiroki Bessho

Hiroshi Shimada

Go Takaki

Yoshiyuki Katayama

Toshihiro Nakao

Shohei Nakai

Kenichi Iwami

Shoso Ishimori

Yoshihiro Ueda

Daisuke Miyazaki

Shinichi Morita

Masaaki Nishinaka

Naoto Mantoku

Takayasu Kobayashi

Go Takagi

Keita Aoki

Ryunosuke Matsumoto

An electric working machine includes battery packs, an actuated device to be actuated by electricity supplied from the battery packs, and a controller to control discharging of the battery packs based on remaining charge levels of the battery packs. The controller is configured/programmed to select one of the battery packs as a discharging battery pack, and perform a limiting process to limit electricity supplied from the discharging battery pack to the actuated device when the remaining charge level of the discharging battery pack is less than a limit threshold, and cause the limit threshold and/or content of the limiting process to differ between when one or more of the battery packs that are other than the discharging battery pack have a remaining charge level of a second threshold or more and when any of such battery packs do not have a remaining charge level of the second threshold or more.

Electric working machine and method of controlling electric working machine

An electric work vehicle includes a first removable cover to cover a portion of a first harness exposed downward through a first opening, a second removable cover to cover a portion of a second harness exposed downward through a second opening, and a third removable cover to cover a portion of a motor exposed downward through a third opening.

Electric work vehicle

An electric work vehicle includes a body, a travel device in the body, a motor to drive the travel device, an inverter to supply power to the motor, an electric component, a DC/DC converter to convert a voltage of power to be supplied to the electric component, a radiator to cool coolant, and a cooling path through which the coolant cooled by the radiator circulates through the motor, the inverter, and the DC/DC converter and returns to the radiator. The cooling path extends from the radiator, passes through the inverter, the motor, and the DC/DC converter in this order, and returns to the radiator.

A power transmission mechanism includes a first motor, a second motor, a first input shaft to which power is transmitted from the first motor, a second input shaft to which power is transmitted from the second motor, a first output shaft to transmit power to a first driven portion, a second output shaft to transmit power to a second driven portion, and a transmission mechanism which includes a planetary gear mechanism to receive power from the first input shaft and from the second input shaft, and is operable to send power from the first input shaft and from the second input shaft to the first output shaft and the second output shaft.

Power transmission mechanism and working vehicle

A working vehicle includes a vehicle body, a traveling device which supports the vehicle body such that the vehicle body is allowed to travel, an electric motor to drive the traveling device, the electric motor being provided on the vehicle body, and a plurality of batteries to store electric power to be supplied to the electric motor, wherein the plurality of batteries include an on-board battery fixed to the vehicle body and a mobile battery detachably attached to the vehicle body.

Working vehicle

An electric vehicle includes: an electric motor; a wheel that is driven by the electric motor; a power transmission mechanism that defines at least a part of a power transmission path between the electric motor and the wheel and that transmits rotational power of the electric motor to the wheel; a wheel brake that is provided on the wheel; an electromagnetic brake that stops rotation of the electric motor; and a controller that maintains a control value of a rotation speed of the electric motor at 0 and activates the electromagnetic brake when a vehicle speed becomes lower than or equal to a predetermined value close to 0.

Electric vehicle

A compressor includes a casing that stores lubricant at a bottom, a compression mechanism disposed in the casing to suck and compress a refrigerant, and an oil return member forming an oil return flow path that extends in a top-to-bottom direction to guide the lubricant discharged from the compression mechanism downward. The oil return flow path includes a uniform-cross-section flow path, and a varying-cross-section flow path continuous with a lower end of the uniform-cross-section flow path. A lower end of the varying-cross-section flow path forms an outlet of the oil return flow path and lies along an inner surface of the casing. A the lower end of the varying-cross-section flow path has a greater width than an upper end of the varying-cross-section flow path, and the lower end of the varying-cross-section flow path has a smaller thickness than the upper end of the varying-cross-section flow path.

Oil return flow path for a compressor

A power source apparatus includes a plurality of batteries, a chassis having an inner space surrounded by a plurality of wall surfaces including a first lateral wall surface, a first vertical wall surface, a second lateral wall surface, a second vertical wall surface and storing the batteries in the inner space, and a blower having a blowing portion to blow air. The power source apparatus further includes an air introduction path formed between the first lateral wall surface and the batteries and configured to introduce the air to the batteries. The blowing portion is arranged between the batteries and the second lateral wall surface and is closer to the second vertical wall surface than to a position at which the separation distance is maximized.

Power source apparatus and work machine having the same

A power source apparatus includes a plurality of batteries, a blower having a blowing portion arranged on one side of the batteries, the blower being configured to blow air from the blowing portion, a chassis having an inner space surrounded by a plurality of wall surfaces that include a first wall surface and a second wall surface and storing the batteries in the inner space. The power source apparatus includes an air introduction path formed between the first wall surface and the batteries, the air introduction path being configured to introduce the air to the batteries, and a flow path formed between the second wall surface and the batteries, the flow path being configured to introduce the air blown from the blower to the air introduction path, the air introduction path having at least partially a first cross-sectional area larger than a second cross-sectional area of the flow path.

A work machine includes an engine, a motor-generator, a battery, a power detector, a temperature detector, and circuitry. The engine is to move the work machine. The motor-generator is to move the work machine and to generate electric power. The battery is to store the electric power generated by the motor-generator. The power detector is to detect a charge level of the electric power stored in the battery. The temperature detector is to detect a temperature of the battery. The circuitry is configured to control the motor-generator in accordance with the charge level selectively to move the work machine or to generate electric power when the temperature of the battery detected by the temperature detector is within a temperature range.

Work machine and method for controlling work machine

A power source apparatus of the present invention includes a battery module, a housing constituting a first chamber configured to house the battery module, the housing having a bracket configured to house and arrange a plurality of the battery modules in parallel, a chassis constituting an inner space surrounded by a plurality of wall surfaces, the chassis storing the housing in the inner space, a blower disposed inside the chassis, the blower being configured to blow air, and a second chamber disposed between the wall surfaces and the bracket and configured to pass the air to an intake portion of the blower, the air having passed through the first chamber. A length of the bracket is longer than a distance between the wall surfaces in a direction of parallel arrangement of the plurality of battery modules, the wall surfaces constituting an inner surface of the second chamber.

Power source apparatus and working machine having the same

A power source apparatus includes a battery module including a plurality of battery cells, a housing forming a housing chamber to house and arrange a plurality of the battery modules in parallel, a blower to blow air, an inter-module path formed between the battery modules adjacent to each other; and an inter-cell path formed between the battery cells adjacent to each other. The housing includes an intake portion to take the air into the housing chamber, and a sending portion to send the air from the housing chamber. The inter-module path has a first inter-module path serving as a path into which the air is introduced. The sending portion is separated, adjacent to at least one battery module, from the first inter-module path such that the air flows in the inter-cell paths of a plurality of the battery modules arranged next to the first inter-module path and adjacent each other.

A work machine includes a machine body, an engine, a rotary electrical device, and an electric power controller. The engine is provided on the machine body to move the machine body. The rotary electrical device is provided on the machine body to move the machine body. The electric power controller is disposed above the rotary electrical device in a height direction along a height of the work machine to control the rotary electrical device.

Work machine

A work machine includes a machine body, an engine, a rotary electrical device, and a battery. The engine is provided on the machine body to move the machine body. The rotary electrical device is provided on the machine body to move the machine body and to generate electric power. The battery is to be charged by the rotary electrical device and to discharge electric power to the rotary electrical device to move the machine body. The battery being is provided adjacent to the engine.

A hybrid vehicle includes an engine, a motor, and a belt stepless speed changer device having a driving rotary body, a driven rotary body, a first shaft member supporting the driving rotary body with allowing rotation thereof in unison, a second shaft member supporting the driven rotary body with allowing rotation thereof in unison, and an endless belt wound around the driving rotary body and the driven rotary body. The vehicle further includes a transmission case configured to receive the powers from the engine and the motor via the belt stepless speed changer device and a centrifugal clutch incorporated in a power transmission line extending form the engine to the first shaft member. The motor is disposed on the side opposite the engine across the driving rotary body, and the driving power of the motor is inputted to the first shaft member.

Growing community of inventors

Sakai, Japan

Shinichi Kawabata