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US 2026/0177144 A1Published application
2-speed transfer case with single actuator
AssigneeHyundai Wia Corporation
InventorSu Whoan LEE
Life of this patent
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Abstract
The present disclosure provides a two-speed transfer case with a single actuator that may implement both the fork axial movement function and the ball ramp operation function by using the single actuator, and can accurately identify the butting or failure state by determining the angular difference before and after the torsion spring through the MR sensor of the motor, the position sensor that directly detects the axial position of the fork, or the angle sensor that directly measures the rotation angle of the cylindrical cam.
Claims20
A 2-speed transfer case comprising:
- a motor comprising an MR sensor that is embedded therein configured to measure the rotational angle of a motor;
- a reduction unit connected to the motor;
- a reduction gear connected to the reduction unit;
- a camshaft coupled to the center of the reduction gear and rotating integrally with the reduction gear;
- a lever cam installed on the cam shaft and rotating integrally with the cam shaft;
- a cylindrical cam installed coaxially with the lever cam;
- a torsion spring unit disposed between the lever cam and the cylindrical cam and configured to transmit the rotation of the lever cam to the cylindrical cam;
- a fork configured to move axially along a cam groove of the cylindrical cam;
- and
- an angle sensor configured to measure the rotational angle of the cylindrical cam.
7 more elements
Dependencies are inferred from the claim text.