Power transmission apparatus for vehicle and vehicle-driving electric machinery system using the same
First Claim
1. A power transmission apparatus for vehicle comprising a motor, a reduction gear unit for decelerating power outputted from said motor, and a differential gear unit for distributing the torque power decelerated by said reduction gear unit to left and right wheels, wherein:
- said reduction gear unit is a reduction gear mechanism including a rotary shaft which is rotatably held by a housing and over which a plurality of gears are mounted in parallel, and said reduction gear unit and said differential gear unit are arranged within an area in oppositely facing relation to an axial end surface of said motor.
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Accused Products
Abstract
The invention provides a power transmission apparatus for vehicle which can realize a high torque transmission efficiency and a high reduction gear ratio of a reduction gear unit with a more compact structure, and a vehicle-driving electric machinery system using the power transmission apparatus for vehicle. The power transmission apparatus for vehicle comprises a motor, a reduction gear unit for decelerating power outputted from the motor, and a differential gear unit for distributing the power decelerated by the reduction gear unit to left and right wheels. The reduction gear unit is a reduction gear mechanism including a plurality of gears mounted over a shaft which is rotatably held by a housing in a fixed position. The reduction gear unit and the differential gear unit are arranged within an area in oppositely facing relation to an axial end surface of the motor.
24 Citations
20 Claims
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1. A power transmission apparatus for vehicle comprising a motor, a reduction gear unit for decelerating power outputted from said motor, and a differential gear unit for distributing the torque power decelerated by said reduction gear unit to left and right wheels, wherein:
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said reduction gear unit is a reduction gear mechanism including a rotary shaft which is rotatably held by a housing and over which a plurality of gears are mounted in parallel, and said reduction gear unit and said differential gear unit are arranged within an area in oppositely facing relation to an axial end surface of said motor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A power transmission apparatus for vehicle for transmitting power outputted from a power supply source to axles of vehicle wheels, said power transmission apparatus for vehicle comprising:
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a motor constituting said power supply source;
a reduction gear unit for receiving and decelerating the power outputted from said motor; and
a differential gear unit for receiving the torque power from said reduction gear unit and distributing the received torque power to at least two outputs, wherein;
said reduction gear unit is a gear mechanism mechanically connected to said motor and said differential gear unit, said gear mechanism includes a rotary shaft over which a plurality of gears are mounted and which is arranged parallel to at least an output shaft of said motor, and said reduction gear unit and said differential gear unit are arranged within an area in oppositely facing relation to an axial end surface of said motor. - View Dependent Claims (10, 11, 12, 13)
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14. A vehicle-driving electric machinery system for transmitting power to axles of vehicle wheels and driving a vehicle, said vehicle-driving electric machinery system comprising:
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a motor driven by a vehicle-loaded electric power supply source serving as a driving source, and generating the torque power; and
a power transmission apparatus for vehicle for transmitting the power outputted from said motor to said axles, said power transmission apparatus for vehicle comprising;
a reduction gear unit for receiving and decelerating the power outputted from said motor; and
a differential gear unit for receiving the power from said reduction gear unit and distributing the received power to at least two outputs, wherein;
said power transmission apparatus for vehicle is arranged within an area in oppositely facing relation to an axial end surface of said motor, said power transmission apparatus for vehicle is disposed in a housing together with said motor to constitute one unit, said axles are mechanically connected to ends of output shafts of said differential gear unit, said reduction gear unit is a gear mechanism including a rotary shaft over which a plurality of gears are mounted and which is arranged parallel to at least an output shaft of said motor, and said reduction gear unit mechanically connects said motor and said differential gear unit to each other. - View Dependent Claims (15, 16, 17, 18)
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19. A power transmission apparatus for vehicle comprising a motor, a reduction gear unit including at least two shafts parallel to an axis of said motor and decelerating power outputted from said motor, and a differential gear unit for distributing the power decelerated by said reduction gear unit to left and right wheels, wherein:
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an output shaft of said motor, and a first shaft and a second shaft of said reduction gear unit each has an axis of rotation, when the vehicle runs forward, a tangential force is generated, in a direction perpendicular to a line connecting the output shaft axis and the first reduction gear shaft axis, at a mesh point between a gear mounted over the output shaft of said motor and a gear mounted over the first shaft of said reduction gear unit, and, the axis of the second shaft of said reduction gear unit is arranged on a side of said line between the output shaft axis and the first reduction gear axis which is in the same direction as the direction of the tangential force.
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20. A vehicle-driving electric machinery system for transmitting power to axles of vehicle wheels and driving a vehicle, said vehicle-driving electric machinery system comprising:
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a motor driven by a vehicle-loaded electric power supply source serving as a driving source, and generating the power; and
a power transmission apparatus for vehicle for transmitting the power outputted from said motor to said axles, said power transmission apparatus for vehicle comprising;
said motor;
a reduction gear unit including at least two shafts parallel to an axis of said motor and decelerating the torque power outputted from said motor; and
a differential gear unit for distributing the power decelerated by said reduction gear unit to left and right wheels, wherein;
an output shaft of said motor, and of a first shaft and a second shaft of said reduction gear unit each has an axis of rotation, when the vehicle runs forward, a tangential force is generated, in a direction perpendicular to a line connecting the output shaft axis and the first reduction gear shaft axis, at a mesh point between a gear mounted over the output shaft of said motor and a gear mounted over the first shaft of said reduction gear unit, and the axis of the second shaft of said reduction gear unit is arranged on a side of said line between the output shaft axis and the first reduction gear axis which is in the same direction as the direction of the tangential force.
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Specification