Abstract: A rail breakage detection device includes a first core part provided to a first cable connecting an electrical neutral point of an impedance bond that electrically connects a first rail and a second rail to the first rail, a second core part provided to a second cable connecting the electrical neutral point of the impedance bond to the second rail, a first coil wound around the first core part to generate a first electromotive force in accordance with a current variation occurring in the first cable, a second coil connected electrically to the first coil and wound around the second core part to generate a second electromotive force in accordance with a current variation occurring in the second cable, and a CPU to determine that the first or second rail is broken based on an electromotive force that is a sum of the first and second electromotive forces.

Abstract: An automobile-motor driving device equipped with speed reducer which has improved supply of lubrication oil to inside of the rolling bearings without sacrificing the function of the bearings, to reduce deformation in the rolling bearing outer ring. A parallel shaft gear speed reducer provides an automobile-motor driving device equipped with speed reducer. The parallel shaft gear speed reducer includes a plurality of gear shafts having two ends supported via rolling bearings fitted into bearing fitting holes in a speed reducer casing which houses the parallel shaft gear speed reducer. A groove in an inner circumferential surface of the bearing fitting hole into which the rolling bearing is fitted communicates between a space that houses the speed reducer and an inside space of the bearing fitting hole, at a location not crossed by the line of action of a load acting upon the rolling bearing due to the meshing of the gears.

Abstract: An information processing method includes acquiring a time chart indicating operation lines corresponding to operations of a plurality of control objects and interlocking modes between the operations, and generating a sequence program corresponding to the operations of the plurality of control objects based on the time chart.

Abstract: An in-wheel motor drive device includes an electric motor to drive a wheel, a wheel support bearing assembly to support the wheel, and a speed reducer to reduce the rotation of the electric motor and then to transmit it to the wheel support bearing assembly, and a lubricant oil is supplied under pressure by an oil pump to the speed reducer to be lubricated. The use is made of a temperature detector to detect the temperature of the lubricant oil or the electric motor and an output limitter to limit the output of the electric motor in the event that the temperature detected by the temperature detector is not higher than a predetermined threshold value.

Abstract: Helical gears in gear trains of speed reducers generate thrust forces in directions not to separate a speed reducer casing which has an axial three-piece structure, whereby leakage of lubricant oil from between separated surfaces in the speed reducer casing is prevented. Output gear which generates large thrust force on the final stage in each gear train of the speed reducers both generated inward forces, so that the center casing does not receive forces in directions in which the left and the right casings is separated therefrom.

Abstract: A failure occurrence determiner may include a rotor angle measurement module that calculates a measurement value of an angular phase of a motor rotor with respect to a wheel, based on a rotational angle of the motor rotor that is detected by an angle sensor equipped to an electric motor and rotational information of the wheel that is detected by a speed sensor. It may also include a rotor angle estimation module that calculates an estimate value of the angular phase of the motor rotor with respect to the wheel, based on a motor torque command value for a motor controller. It may also include a failure determination module that determines that a failure has occurred in a motor drive device, if a difference between the measurement value and the estimate value of the angular phase of the motor rotor is equal to or greater than a threshold.

Abstract: Helical gears in gear trains of speed reducers 2L, 2R generate thrust forces in directions not to separate a speed reducer casing 20 which has an axial three-piece structure, whereby leakage of lubricant oil from between separated surfaces in the speed reducer casing 20 is prevented. Output gears 25L, 25R which generates large thrust force on the final stage in each gear train of the speed reducers 2L, 2R both generates inward forces, so that the center casing 20a does not receive forces in directions in which the left and the right casings 20bL, 20bR is separated therefrom.

Abstract: An automobile-motor driving device equipped with speed reducer which has improved supply of lubrication oil to inside of the rolling bearings without sacrificing the function of the bearings, to reduce deformation in the rolling bearing outer ring. A parallel shaft gear speed reducer provides an automobile-motor driving device equipped with speed reducer. The parallel shaft gear speed reducer includes a plurality of gear shafts having two ends supported via rolling bearings fitted into bearing fitting holes in a speed reducer casing which houses the parallel shaft gear speed reducer. A groove in an inner circumferential surface of the bearing fitting hole into which the rolling bearing is fitted communicates between a space that houses the speed reducer and an inside space of the bearing fitting hole, at a location not crossed by the line of action of a load acting upon the rolling bearing due to the meshing of the gears.

Abstract: A two-motor vehicle-driving apparatus is provided where the size of speed reducers in a radial direction is small. A motor shaft of the electric motor has an axial-through hollow structure. The motor shaft is provided with an input gear integrally therewith at its end closer to the speed reducer, with an output shaft provided inside the hollow motor shaft coaxially therewith. The output shaft has an output gear integrally therewith at its end closer to the speed reducer. The speed reducer is provided with one or more intermediate shafts rotatably in parallel with the motor shaft and the output shaft. The intermediate shaft is provided with a plurality of gears integrally therewith for engagement with the input gear of the motor shaft and with the output gear of the output shaft to transmit rotation of the motor shaft to the output shaft at a reduced speed.

Abstract: The present structure does not require a knuckle on the vehicle body side, improves rotational accuracy of an input shaft of a speed reduction unit, increases durability of bearings, and suppresses rotation noise of the bearings by improving the supporting structure of the input shaft of the speed reduction unit. In a drive device for an electric vehicle comprising: a speed reduction unit including an input shaft driven by an electric motor; a hub unit rotationally driven by an output member of the speed reduction unit; and a housing accommodating the electric motor and the speed reduction unit, wherein the input shaft of the speed reduction unit is supported by bearings provided at two locations in the axial direction, the drive device is configured such that the bearings provided at the two locations are both supported by the output member, and the housing is provided with a suspension joining portion.

Abstract: An object of the present invention is to prevent lubricant oil of a speed reduction unit from moving to an electric motor side and besides to prevent an eccentric load from acting on bearings supporting an input shaft. In a drive device for an electric vehicle including: a speed reduction unit including an input shaft driven by output of an electric motor; a hub unit rotationally driven by an output member of the speed reduction unit; and a housing accommodating the electric motor and the speed reduction unit, the configuration is made such that a partition for partitioning an accommodation section into respective accommodation spaces of the electric motor and the speed reduction unit is provided in the housing, and an oil seal member is placed between a peripheral edge portion of a center hole of the partition and a rotor support member the electric motor.

Abstract: A drive device for an electric vehicle includes: a speed reduction unit including an input shaft driven by output of an electric motor; a hub unit rotationally driven by an output member of the speed reduction unit; and a housing accommodating the electric motor and the speed reduction unit. The drive device is provided with a power supply terminal box made up of: an accommodation recessed portion provided in a rear end surface of the housing; a power supply terminal provided inside the accommodation recessed portion; a communication hole in communication with the accommodation recessed portion and an interior of the housing; and a cover member for the accommodation recessed portion.

Abstract: A drive device for an electric vehicle in which, by improving a supporting structure of an input shaft of a speed reduction unit, the bearing stiffness of a hub bearing is improved, while the rotational accuracy and the durability of an input shaft of a speed reduction unit are improved and noise is suppressed. The drive device includes: a speed reduction unit including an input shaft driven by an electric motor; a hub unit rotationally driven by the speed reduction unit; and a housing. The input shaft of the speed reduction unit is supported by bearings provided at two locations in the axial direction. The bearings are both supported by the output member, and the PCD of the inboard-side hub bearing of the hub bearings disposed at the two locations in the axial direction of the hub unit is larger than the PCD of the outboard-side hub bearing.

Abstract: An electric vehicle to automatically adjust output torque during travelling even when there is a difference in the output characteristic between two traction motor units that independently drive left and right drive wheels. The electric vehicle includes the motor units; a torque command unit that outputs torque command values to the motor units; a torque difference occurrence determiner that determines that a difference has occurred between actual driving forces TL, TR of the respective drive wheels even when the torque command unit applies the same torque command values TL*, TR* to the motor units; and a driving force difference reducer that, if the determiner determines that a driving force difference not less than a set value has occurred between the drive wheels, causes control of reducing the driving force difference to be performed during travelling.

Abstract: An in-wheel motor drive device includes an electric motor to drive a wheel, a wheel support bearing assembly to support the wheel, and a speed reducer to reduce the rotation of the electric motor and then to transmit it to the wheel support bearing assembly, and a lubricant oil is supplied under pressure by an oil pump to the speed reducer to be lubricated. The use is made of a temperature detector to detect the temperature of the lubricant oil or the electric motor and an output limitter to limit the output of the electric motor in the event that the temperature detected by the temperature detector is not higher than a predetermined threshold value.

Abstract: A motor drive apparatus for a vehicle is provided which can prevent its transmission and motor from being rotated by vehicle wheels, and which allows quick gear change. This apparatus includes an electric motor (10), a first shaft (21) driven by the electric motor (10), a second shaft (22), first and second reduction gear trains (23 and 24) disposed between the first and second shafts (21 and 22). Two-way roller clutches (30A and 30B) are mounted between a first output gear (23b) of the first reduction gear train (23) and the second shaft (22) and between a second output gear (24b) of the second reduction gear train (24) and the second shaft (22), respectively. Gear changes are made by selectively engaging and disengaging the two-way roller clutches (30A and 30B) with a speed changing mechanism (50).

Abstract: This air-cooled type in-wheel motor drive assembly 21 includes a lubrication oil circuit for lubricating a speed reduction unit B by allowing lubrication oil discharged from a lubrication oil pump 51 to flow through interconnected oil passages 54, 55, 56 provided to a casing 22, motor-rotary-shaft oil passage 57, speed-reduction-unit input-shaft oil passage 58 and interior of the speed reduction unit B, and for cooling a motor unit A and the speed reduction unit B with the lubrication oil cooled with the aid of outer fins 22f while flowing through the oil passages 54, 55, 56 provided to the casing.

Abstract: An electric vehicle is provided in which left and right drive wheels are driven by respective motors, and which enables slip control in a simple structure while preventing a driver who used to drive an engine vehicle with a differential from feeling uncomfortable. The vehicle includes a controller having a computer controlling the two motors including a basic control unit, a slip determiner, and a dual-wheel-drive-reduction unit. The control unit determines driving forces of the motors such that the forces are equal to each other, depending on a depression of an accelerator pedal. The determiner detects slippage between each of the wheels, and a road surface. The dual-wheel-drive-reduction unit reduces, when the determiner determines that greater slippage has occurred at at least one of the wheels, drive currents of the motors.

Abstract: An object of the present invention is to achieve improvements in the rotational accuracy of the input shaft and the durability of the bearings, and suppression of rotational noise, by improving the support structure of the input shaft of the speed reduction unit. Provided is a drive device for an electric vehicle, including: an electric motor; a speed reduction unit including an input shaft driven by output of the electric motor; and a hub unit rotationally driven by an output member of the speed reduction unit, wherein the input shaft of the speed reduction unit is supported by bearings provided at two locations in an axial direction, the drive device for an electric vehicle being configured such that the bearings at the two locations are attached together to the output member.

Abstract: An electric vehicle is provided which allows an output torque to be automatically adjusted during travelling even when there is a difference in output characteristic between two traction motor units (6, 6) that independently drive left and right drive wheels (2).