公开(公告)号：US20250010967A1

公开(公告)日：2025-01-09

申请号：US18743831

申请日：2024-06-14

Applicant: Hitachi Astemo, Ltd.

Inventor： Ryo HASHIMOTO ,  Yohei HAMA

IPC: B63H25/02

Abstract: A watercraft steering device includes: a steering rotatably provided on a hull; a helm mechanism configured to convert a rotational operation of the steering into a linear motion and adjust a traveling direction of the hull; and an electric assist device configured to generate a torque depending on a rotation amount of the steering. The electric assist device is couplable to the helm mechanism, and the electric assist device includes: a coupling shaft portion that is coupled to a helm shaft portion that is a rotation shaft of the helm mechanism; an electric motor that generates a torque by being energized and transmits the generated torque to the coupling shaft portion; and a control device that controls the electric motor to generate a predetermined torque based on a magnitude of the torque generated by rotation of the steering.