Patent ID: 11958547
Assignee: KNORR-BREMSE COMMERCIAL VEHICLE SYSTEMS JAPAN LTD.
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 8:
9. The steering device as claimed in claim 1, wherein
the torque sensor includes a magnet, a magnet retaining member, a first yoke, a second yoke and a magnetic sensor,
the magnet has an annular shape where N-pole and S-pole are alternately arranged in a circumferential direction of the rotation axis of the steering shaft,
the magnet retaining member is made of metal material, and has a plastic deformation fixing portion and a magnet retaining portion,
the plastic deformation fixing portion is fixed to the second shaft by plastic deformation,
the magnet retaining portion retains the magnet,
the first yoke is made of magnetic material, is provided at the first shaft, and has a first annular portion and a plurality of first nail portions,
the plurality of first nail portions are provided at the first annular portion, and are arranged in the circumferential direction of the rotation axis of the steering shaft with each first nail portion facing the magnet,
the second yoke is made of magnetic material, is provided at the first shaft, and has a second annular portion and a plurality of second nail portions,
the plurality of second nail portions are provided at the second annular portion, and are arranged such that the second nail portions and the first nail portion are alternately arranged in the circumferential direction of the rotation axis of the steering shaft with each second nail portion facing the magnet,
the magnetic sensor is set between the first annular portion and the second annular portion, and outputs a signal according to a magnetic field in a setting area of the magnetic sensor, and
the plastic deformation fixing portion overlaps the first annular port ion and the second annular portion in a direction of a rotation axis of the steering shaft.