Vehicle power transmission device
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsMizuki IMAFUKU, Akinori HOMAN, Tomohiro ARAKAWA
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Abstract
In a transfer, a high thrust can be given to a front-wheel driving clutch by a high magnification function of a screw mechanism. Further, a necessary stroke for an operation of a high-low switching mechanism can be obtained by the screw mechanism. Accordingly, with the use of one motor, the screw mechanism, and a transmission mechanism, it is possible to perform a switching operation of the high-low switching mechanism and a torque adjustment of the front-wheel driving clutch by the same system. Hereby, it is possible to perform, with accuracy, the switching operation of the high-low switching mechanism and the torque adjustment of the front-wheel driving clutch, based on a motor rotation angle Am of one motor.
Claims10
A power transmission device for a vehicle, the power transmission device comprising:
- a transfer including
- an input rotational member,
- a first output rotational member configured to output a power to first right and left wheel assemblies,
- a second output rotational member configured to output a power to second right and left wheel assemblies,
- a high-low switching mechanism configured to change a speed of a rotation of the input rotational member and, the high-low switching mechanism being configured to transmit the rotation to the first output rotational member,
- a clutch configured to adjust a transmission torque to be transmitted from the first output rotational member to the second output rotational member,
- a motor,
- a screw mechanism configured to convert a rotational motion of the motor into a linear motion,
- a transmission mechanism configured to transmit a linear motion force of the screw mechanism to the high-low switching mechanism and the clutch, and
- a rotation angle sensor configured to detect a rotation angle of the motor;
- and
- at least one electronic control unit configured to perform a switching operation of the high-low switching mechanism and adjustment of the transmission torque of the clutch, based on the rotation angle of the motor.
Dependencies are inferred from the claim text.