Patent ID: 9126476
Filing Date: 2015-09-08
Classification: B60B,B60G,B60K,B60L,G01L

Abstract:
1. An in-wheel motor drive assembly comprising: a motor unit that drivingly rotates a motor-side rotating member; a speed reduction unit that reduces a rotational speed of the motor-side rotating member and transmits reduced rotation to a wheel-side rotating member; a wheel hub that is fixedly coupled to the wheel-side rotating member; a wheel hub bearing that rotatably supports the wheel hub; a casing that covers the motor unit and the speed reduction unit; a plurality of sensors that are mounted on the casing and capable of detecting strain generated in the casing; and a signal processor that calculates load imposed on a wheel on the basis of strain signals output from the sensors; wherein the signal processor is capable of calculating loads in at least three directions imposed on the wheel and rotational torque generated in a rotational direction r of the wheel based on output signals from the sensors, and the three directions include a direction x along a traveling direction of the vehicle, a rotation axis direction y of the wheel, and a vertical direction z.