Dual-Function Suspension System for Damping and Steering
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Summary
Problems
Existing vehicle suspension systems that incorporate a ball screw cannot steer wheels, limiting their ability to control vehicle movement without a separate steering system.
Innovation solutions
A suspension system that includes a shaft with both screw and spline grooves, a ball screw nut, a ball spline nut, a ball screw-specific motor, and a ball spline-specific motor, allowing for the generation of damping forces and wheel steering by rotating the unsprung mass relative to the sprung mass.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If a ball screw mechanism is used to generate damping force, then shock absorption capability is improved, but wheel steering capability deteriorates
Why choose this principle:
The invention divides the shaft into functional segments: a screw groove portion for damping force generation and a spline groove portion for steering. The ball screw mechanism and ball spline mechanism are separated into distinct functional zones on the same shaft, allowing independent operation of damping and steering functions without interference.
Principle concept:
If a ball screw mechanism is used to generate damping force, then shock absorption capability is improved, but wheel steering capability deteriorates
Why choose this principle:
The shaft is designed with dual functionality by incorporating both screw grooves and spline grooves on the same component. This single shaft serves two purposes: generating damping force through the ball screw mechanism and enabling wheel steering through the ball spline mechanism, eliminating the need for separate steering system components.
Application Domain
Data Source
AI summary:
A suspension system that includes a shaft with both screw and spline grooves, a ball screw nut, a ball spline nut, a ball screw-specific motor, and a ball spline-specific motor, allowing for the generation of damping forces and wheel steering by rotating the unsprung mass relative to the sprung mass.
Abstract
A suspension is provided which can not only generate a damping force between sprung mass and unsprung mass but also steer a wheel. A suspension includes: a shaft coupled to sprung mass of a vehicle, the shaft having a screw groove and a spline groove formed thereon; a ball screw nut assembled to the shaft via a ball; a ball spline nut assembled to the shaft via a ball; a ball screw-specific motor connected to the ball screw nut; a ball spline-specific motor connected to the ball spline nut; and a case coupled to unsprung mass of the vehicle, the case being configured to hold the ball screw-specific motor and the ball spline-specific motor. The ball spline-specific motor rotates the ball spline nut and the shaft relative to the case.