Variable Steering Rack Stopper for Low-Noise Displacement Control
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Solution Overview
Problem
Variable steering rack systems experience high noise levels due to abrupt contact between components, and their complex design complicates manufacturing, while low-speed operation at low temperatures reduces motor performance.
Innovation Solution
A variable steering rack system with a ring-shaped stopper and stop rings that regulate movement through frictional contact, reducing noise and allowing continuous variation of maximum displacement, featuring a spiral groove for smooth movement and a control system to manage motor operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the stopper rotates at high speed to control steering rack movement, then the motor performance is improved, but a loud colliding sound occurs when the stop protrusion contacts the knob
Solution Approach 1:
The patent applies beforehand cushioning by introducing a rubber buffer between the stop protrusion and the knob on the stopper. This buffer is positioned in advance to absorb the impact energy when the stopper rotates and the stop protrusion contacts the knob, thereby preventing the loud colliding sound while allowing the motor to operate at high speed for optimal performance
2Length of moving object
If the stopper thickness is increased to limit the movement displacement of the steering rack bar, then the movement range control is improved, but the layout and shape become complex complicating the manufacturing process
Solution Approach 1:
The patent applies dynamics by making the stopper thickness adjustable rather than fixed. The stopper can be positioned at different locations along the steering rack bar using a sliding mechanism with positioning holes, allowing the movement displacement limit to be dynamically changed according to different operating conditions (such as whether chains are mounted on tires) without changing the overall layout or shape complexity of the system
3Object-generated harmful factors
If the motor rotates at low speed to prevent colliding sound at low temperatures, then the noise is reduced, but the motor performance is reduced
Solution Approach 1:
The patent applies beforehand cushioning by introducing a rubber buffer between the stop protrusion and the knob on the stopper. This buffer is positioned in advance to absorb the impact energy when the stopper rotates and the stop protrusion contacts the knob, thereby preventing the loud colliding sound while allowing the motor to operate at high speed for optimal performance
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Minimizes noise and maintains motor performance at high speeds, simplifies manufacturing by reducing component complexity and enabling continuous adjustment of movement displacement.
Implementation Method 1
A spiral groove is formed on the interior circumference of the case between the stop rings, the driving portion is configured to rotate the stopper, and an exterior surface of the stopper is disposed in the spiral groove such that the stopper can move along the moving direction of the steering rack bar corresponding to the rotation thereof
Implementation Method 2
A variable steering rack system with a ring-shaped stopper and stop rings that regulate movement through frictional contact
Data Source
AI summary
A variable steering rack system in one embodiment includes a pair of stop rings and a stopper moveable between the rings. The stopper may be rotatable in one embodiment during translational movement between the rings by a motor. Preferably, the stopper may stop due to a frictional engagement between the stopper and the stop rings. Noise may be reduced, and because the motor may rotate at a high speed, motor performance may not be degraded under low temperature circumstances.