Abstract: An electric riding mower efficiently cooling a motor driver with a simple configuration is provided. Provided are two running motors 16 independently driving paired rear tires 13; a mower blade mowing grass by being rotated; a mowing motor 15 rotating the mower blade; a battery 25 supplying electric power to the running motors 16 and the mowing motor 15; and a mower-motor driver MD controlling the rotational speed of the mowing motor 15, wherein the mower-motor driver MD is disposed in a driver storage part on a front part of the mower, and a slit 33SL taking in external air is disposed on a front surface of the driver storage part.

Abstract: A control system for an engineless, motor-driven lawnmower vehicle includes electric motors and controllers. At least one of the electric motors is an electric drive motor connected to a drive wheel of the lawnmower vehicle to enable transmission of motive power. At least one other electric motor is a mower-related electric motor connected to a lawnmower rotary tool to enable transmission of motive power. At least one of the controllers is a drive wheel controller which includes a drive wheel driver and which controls operation of the electric drive motor in response to a signal from at least one operator sensor for detecting an operation amount of at least one operator. At least one controller controls to activate or stop the mower-related electric motor. At least one controller is connected to the drive wheel controller and transmits a control signal thereto in response to a signal from the operator sensor.

Abstract: A riding lawnmower vehicle includes two main drive wheels, at least one caster wheel, an electric traction motor, an internal combustion engine, a generator driven by the internal combustion engine, and a lawnmower. The electric energy generated by the generator can be supplied directly or via an electric accumulator to the electric traction motor. The main drive wheels are independently driven by the electric traction motor, which can operate as a traction power source. When viewed from one end to the other end in the width direction of the vehicle, the internal combustion engine and a secondary battery operable as the electric accumulator overlap each other, and the main drive wheels overlap at least a part of at least one of the internal combustion engine, the generator, the secondary battery, a fuel cell, a capacitor, an inverter, a cooling device, a mower driving motor, and a grass-collecting duct.

Abstract: This invention provides an electric ride-on mower that can easily lift up and down the mower deck and can also lift up and down the mower deck so that it remains horizontal. The electric ride-on mower has driving motors, mower blades spinning for mowing grass, mowing motors for the mower blades, batteries for the driving motors and the mowing motors, a mower deck for covering the mower blades from the above and sides and for setting the mowing motors on, and a mower deck lifting device for lifting up and down the mower deck, wherein: the mower deck lifting device has a booster for assisting the mower deck lifting device in lifting up and down the mower deck, and the mower deck lifting device is set at the center on the mower deck.

Abstract: A control system for a lawnmower vehicle having a plurality of electric motors may include at least one controller for controlling operation of the drive wheel electric motor in response to an operation amount of at least one operator. The controller may control operation of a driver for driving a mower-related electric motor to cause the mower-related electric motor to activate or stop.

Abstract: A dual clutch transmission comprises a first clutch to be engaged for setting any one of forward-traveling odd-numbered speeds and a second clutch to be engaged for setting any one of forward-traveling even-numbered speeds. The dual clutch transmission establishes a desired forward-traveling speed by alternately engaging/disengaging the first and second clutches. A backward-traveling drive train is adapted to be driven by engaging one of the first and second clutches. When a reverse mode is established by a mode setting means, the one of the first and second clutches is engaged to drive the backward-traveling drive train by setting a speed change manipulator at a backward-traveling position, and the other of the first and second clutches is engaged to drive a fixed one forward-traveling speed drive train by setting the speed change manipulator at a forward-traveling position.

Abstract: An electric lawn mower includes a main frame, a mower deck supported by the main frame, a castor supported by the main frame, a sub frame, a pair of transaxles, and a pair of motor drivers. Each of the transaxles includes a transaxle housing, an electric motor disposed in the transaxle housing, a single axle supported by the transaxle housing, and a drive wheel fixed on the axle outside of the transaxle housing. The motor drivers supply electric power to the respective motors of the respective transaxles. The sub frame, supporting the transaxles and the motor drivers, is connected to the main frame.

Abstract: A vehicle has an engine, an accelerator for controlling the rotary speed of the engine, an axle and a multi-speed transmission for transmitting power from the engine to the axle. The multi-speed transmission includes an odd-numbered speed drive train for an odd-numbered speed level, a first clutch for the odd-numbered speed drive train, an even-numbered speed drive train for an even-numbered speed level, and a second clutch for the even-numbered speed drive train. In correspondence to operation of the accelerator and an actual speed of the axle, either the odd-numbered speed drive train or the even-numbered speed drive train is selected so as to transmit power from the engine to the axle. A shift-up or shift-down timing between the odd-numbered speed level and the even-numbered speed level relative to variation of the actual speed of the axle is changed according to detection of a tilt angle of the vehicle or a weight of the vehicle.

Abstract: There is provided an electric ground working vehicle including a left wheel and a right wheel, at least one caster, a working apparatus, an acceleration operating element for performing acceleration instructions, a turn operating element for performing turn instructions, and a control unit. The left wheel and the right wheel are independently driven by left and right electric motors respectively. The control unit controls a regenerative brake driving unit so that electric power is regenerated from the left and right electric motors to an electric power source unit when the acceleration operating element is not operated during traveling to regeneratively brake the left and right wheels.

Abstract: A dual clutch transmission includes a group of odd-numbered speed drive trains, including at least a first speed drive train to be driven for setting a first speed serving as the lowest speed; a first clutch to be engaged for driving any one of the odd-numbered speed drive trains including the first speed drive train; a group of even-numbered speed drive trains, including at least a second speed drive train to be driven for setting a second speed serving as the second lowest speed; a second clutch to be engaged for driving any one of the even-numbered speed drive trains including the second speed drive train; an automatic speed control system for selecting one of all the odd-and-even numbered speed drive trains to be driven, and for selecting either the first or second clutch to be engaged for driving the selected speed drive train in correspondence to a traveling speed of a vehicle equipped with the dual clutch transmission; and a manual selection device for selecting any one of all the odd-and-even numbered

Abstract: In a bi-directional overrunning clutched differential unit, a pair of coaxial hubs are relatively unrotatably fitted on respective coaxial output shafts, and are relatively rotatably inserted into a cage holding rollers. A pair of second bearings journal a clutch housing disposed around the cage is diametrically larger than a pair of first bearings journaling the respective hubs, and are disposed between the first bearings in the axial direction of the output shafts. An axial end portion of the cage and the second bearing on the same axial side are distant from the first bearing on the same axial side so as to have a space where a friction mechanism for applying a frictional rotation resistance onto the cage is disposed.

Abstract: A gear transmission comprises a traveling load detection element including an upstream detection member, a downstream detection member and a biasing member. One of the upstream and downstream detection members is an axially slidable detection member which is axially slidable along an output shaft. One of the upstream and downstream detection members has a first engagement part and a second engagement part. The first engagement part and the second engagement part generate respective forces for sliding the axially slidable detection member opposite to the biasing direction of the biasing member. The forces are changed according to variation of the traveling load.

Abstract: An electric transaxle unit includes an axle, an electric motor for driving the axle, a motor shaft serving as an output shaft of the electric motor, the motor shaft being not coaxial to the axle, a deceleration gear train interposed between the motor shaft and the axle, a brake adapted to brake any element in a power train between the motor shaft and the axle via the deceleration gear train, and a casing. The casing incorporates the axle, the electric motor, the motor shaft, the deceleration gear train and the brake. The casing includes an attachment portion to be attached to a frame, and wherein the attachment portion has a constant height from a center axis of the axle regardless of whether the casing is vertically inversed.

Abstract: A riding work vehicle includes right and left wheels, at least one caster wheel, and a working machine. The lawnmower vehicle further includes traveling motor, steering motor, a traveling system clutch, and a steering system clutch. The traveling system clutch is configured to disable transmission of the rotational force from an axle of the caster wheel to the traveling motor in a state where the traveling motor is deactivated. The steering system clutch is configured to disable transmission of the rotational force from a steering shaft for the caster wheel to the steering motor in a state where the steering motor is deactivated.

Abstract: A vehicle has an engine, an accelerator for controlling the rotary speed of the engine, an axle and a multi-speed transmission for transmitting power from the engine to the axle. The multi-speed transmission includes an odd-numbered speed drive train for an odd-numbered speed level, a first clutch for the odd-numbered speed drive train, an even-numbered speed drive train for an even-numbered speed level, and a second clutch for the even-numbered speed drive train. In correspondence to operation of the accelerator and an actual speed of the axle, either the odd-numbered speed drive train or the even-numbered speed drive train is selected so as to transmit power from the engine to the axle. A shift-up or shift-down timing between the odd-numbered speed level and the even-numbered speed level relative to variation of the actual speed of the axle is changed according to detection of a tilt angle of the vehicle or a weight of the vehicle.

Abstract: There is provided an electric ground working vehicle including a left wheel and a right wheel, at least one caster, a working apparatus, an acceleration operating element for performing acceleration instructions, a turn operating element for performing turn instructions, and a control unit. The left wheel and the right wheel are independently driven by left and right electric motors respectively. The control unit controls a regenerative brake driving unit so that electric power is regenerated from the left and right electric motors to an electric power source unit when the acceleration operating element is not operated during traveling to regeneratively brake the left and right wheels.

Abstract: A vehicle has an engine, an accelerator for controlling the rotary speed of the engine, an axle and a multi-speed transmission for transmitting power from the engine to the axle. The multi-speed transmission includes an odd-numbered speed drive train for an odd-numbered speed level, a first clutch for the odd-numbered speed drive train, an even-numbered speed drive train for an even-numbered speed level, and a second clutch for the even-numbered speed drive train. In correspondence to operation of the accelerator and an actual speed of the axle, either the odd-numbered speed drive train or the even-numbered speed drive train is selected so as to transmit power from the engine to the axle. A shift-up or shift-down timing between the odd-numbered speed level and the even-numbered speed level relative to variation of the actual speed of the axle is changed according to detection of a tilt angle of the vehicle or a weight of the vehicle.

Abstract: A bi-directional clutch to be equipped on a vehicle, which is selectively automatically clutched off for putting the vehicle into a two-wheel drive mode or clutched on for putting the vehicle into a four-wheel drive mode, in correspondence to a condition of the vehicle during either forward traveling or backward traveling. The invention also relates to a vehicle equipped with the bi-directional clutch.