Rotary angle detecting device

Abstract

The present invention relates to a rotary angle detecting device applied to a rudder angle sensor or the like for a vehicle, and more particularly, to a rotary angle detecting device in which a synthetic-resin wheel member provided with a detecting portion is attached to a steering shaft to rotate together. The rotary angle detecting device comprises: a synthetic-resin wheel member having encoding pattern column as a section to be detected is provided on a steering shaft having a pair of cross faces on top section to integrally rotate, such that rotation information of the steering shaft can be detected, wherein the wheel member is mounted on the steering shaft with a metal sheet-made mounting member of a pair of tongue pieces, which extends from an inner peripheral surface located at the opening of the ring portion. The both of tongue pieces are bent pieces arranged oppositely by the opening, and a bent section is formed between the base end of the through-hole and top end of a free end. A ring section is riveted on a barrel section of the wheel member, and the tongue pieces are respectively pressed on a pair flat faces in line contact station, the pair of flat faces are on external peripheral surface of the steering shaft inserted in the shaft hole.

Description

technical field [0001] The present invention relates to a rotation angle detection device suitable for use in a steering angle sensor of an automobile, and more particularly to a rotation angle detection device in which a synthetic resin disc member provided with a detected portion is attached to a steering shaft and rotated integrally. Background technique [0002] The related technology that has been known in the past is that a rotation angle detection device is arranged between the steering shaft of the automobile and the vehicle body, and the damping of the suspension is performed according to the steering angle and steering speed of the steering wheel detected by the rotation angle detection device. Power control, gear control of automatic transmission (Automatic Transmission) or rear wheel steering control on four-wheel steering vehicles, etc. [0003] In general, such a rotation angle detection device includes: a disk member having a detected portion such as a coded p...

AI Technical Summary

Problems solved by technology

Therefore, in the conventional assembly work, the disk member is directly or indirectly forcibly fitted by inserting the disk member in the axial direction of the steering shaft, so that the disk member after the assembly operation does not slip or loosen in the direction of rotation relative to the steering shaft. However, In the above-mentioned assembly work, it is necessary to apply a considerable pressing force to the disk part, so there is a problem that the work efficiency is very poor.

[0006] Also, in order to improve work efficiency when assembling the disc unit, it is possible to slightly reduce the fitting strength between the disc unit side and the steering shaft, however, if In the conventional structure, the fitting strength on the side of the disk member is lowered, and the disk member after the assembly work may slip or loosen in the rotation direction relative to the steering shaft, so it is difficult to ensure good detection accuracy.

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