Back to results
US 2026/0155701 A1Published application
Outer rotor type motor
AssigneeShinano Kenshi Co., Ltd.
InventorShun TAKAYAMA
Life of this patent
Estimating the term…
Abstract
A pre-loading spring is fitted on an outer circumference of a rotor shaft between a hub of a rotor yoke and a bearing disposed opposite the hub in an axial direction, and is mounted so as to be compressed shorter than its equilibrium length. The preloading spring is a compression coil spring, and is wound in a direction relative to a direction of rotation of the rotor yoke so that a winding end does not interfere with driven rotation.
Claims4
An outer rotor type motor, comprising:
- a stator on which stator poles are formed;
- a rotor on which rotor poles composed of a permanent magnet are disposed radially outside the stator to face the stator poles;
- a rotor shaft whose shaft end portion that is integrally assembled with a hub of a rotor yoke, which is cup-shaped;
- a pair of rolling bearings which are assembled inside a bearing housing provided in a motor housing and rotatably support the rotor shaft;
- and
- a pre-loading spring which is fitted between the hub of the rotor yoke and the rolling bearing disposed opposite the hub in an axial direction on an outer circumference of the rotor shaft, and is compressed to shorter than an equilibrium length thereof,
- wherein the pre-loading spring is a compression coil spring that is wound in a direction relative to a direction of rotation of the rotor yoke so that a winding end of the pre-loading spring does not interfere with driven rotation.
4 more elements
Dependencies are inferred from the claim text.