Steering system
US11027769B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 30, 2018 |
| Grant date | Jun 8, 2021 |
| Priority date | — |
| Expiry date | Sep 18, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D5/0481
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A steering system includes a rack shaft, a housing, an electric motor, a control device, and a speed reduction mechanism that applies a moving force in the axial direction to the rack shaft with the speed of rotation of the electric motor reduced. The housing has a rack shaft housing portion and a speed reduction mechanism housing portion. The electric motor has: a motor case fixed to the housing; a plurality of stator cores disposed annularly in the motor case; coil windings wound around the plurality of stator cores; and a rotor. The motor case is formed with a water introduction hole that introduces water that has entered the speed reduction mechanism housing portion into the motor case. The control device has a detector that detects entry of water into the motor case.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.