Steering Feedback Gear Layout With Adjustable Backlash
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Solution Overview
Problem
Conventional steering feedback actuators in steer-by-wire systems have complex mechanisms, high manufacturing costs, and are prone to noise due to gear backlash.
Innovation Solution
A steering feedback actuator design featuring a housing part, a steering column, a first gear part, and an electric motor part with adjustable interaxial distance between the steering column and motor shaft, utilizing plastic and metal gear parts to reduce backlash and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional reducers (worm reducer, belt type reducer, planetary gear reducer) are used in steering feedback actuators, then steering feedback function is achieved, but device complexity increases and manufacturing cost increases
Solution Approach 1:
The patent combines the motor shaft and steering column into a single integrated component, eliminating the need for separate reducers. The motor shaft directly engages with the steering column through gear parts, simplifying the overall mechanism while maintaining steering feedback functionality.
Solution Approach 2:
The motor shaft serves multiple functions: it acts as both the output shaft of the motor and the input shaft for the steering column, while also incorporating gear parts for direct engagement. This multi-functionality reduces the number of components needed.
2Reliability
If conventional reducers with gear mechanisms are used, then steering feedback function is achieved, but manufacturing cost increases
Solution Approach 1:
By merging the motor shaft and steering column into one integrated component with direct gear engagement, the patent reduces the number of parts that need to be manufactured and assembled, thereby lowering manufacturing costs.
Solution Approach 2:
The patent changes the structural parameters by eliminating intermediate reduction stages and using direct gear engagement between the motor shaft and steering column, simplifying the manufacturing process.
3Reliability
If reducers with gear mechanisms are used, then steering feedback function is achieved, but noise increases due to gear backlash
Solution Approach 1:
The direct integration of the motor shaft and steering column with gear parts eliminates intermediate gear stages, reducing the cumulative backlash that causes noise in conventional multi-stage reducer systems.
Data Source
AI summary
A steering feedback actuator including a housing part, a steering column configured to be rotatably accommodated within the housing part and arranged in a first direction, a first gear part coupled to the steering column and configured to rotate with the steering column, and an electric motor part including a motor housing coupled to the housing part configured to cover an opening of the housing part and a motor shaft rotatably coupled to the motor housing, the motor shaft including a second gear part configured to engage with the first gear part.