Steering Shaft Bearing Assembly with Damping Disk
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Solution Overview
Problem
Steering devices in vehicles experience noise and impaired steering behavior due to high loads on bearings, leading to bearing play and instability.
Innovation Solution
A bearing assembly with a damping disk that provides dual damping functions in both radial and axial directions, stabilizing the steering shaft by integrating a bearing within a housing and using a spring element to absorb shocks and impacts, and incorporating a helical gear for compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional bearings are used to support the steering shaft, then the steering shaft can rotate, but under high loads the bearings develop play and generate noise
Solution Approach 1:
The damping disk is pre-installed in the bearing housing to cushion and absorb shocks and impacts before they reach the bearing. This preventive measure reduces the direct transmission of axial loads to the bearing, thereby minimizing bearing play and noise generation while maintaining steering shaft stability under high loads.
Solution Approach 2:
The damping disk acts as an intermediary element between the bearing housing and the bearing. It mediates the transmission of axial forces by absorbing impacts through its damping material, thereby protecting the bearing from direct high-load impacts that would otherwise cause play and noise.
2Strength
If the bearing housing is made rigid to support high loads, then structural strength is improved, but vibrations and impacts are transmitted more strongly
Solution Approach 1:
The damping disk serves as an intermediary between the rigid bearing housing and the bearing, absorbing vibrations and impacts that would otherwise be transmitted through the rigid structure. This allows the housing to maintain its strength while reducing the transmission of harmful vibrations and impacts.
Solution Approach 2:
The damping disk is made of vibration- and impulse-damping material, representing a composite approach where a viscoelastic material is integrated into the mechanical housing structure. This composite construction allows the system to simultaneously achieve rigidity for load bearing and damping for vibration reduction.
3Object-affected harmful factors
If damping elements are added to reduce vibrations, then noise is reduced, but device complexity increases
Solution Approach 1:
The damping disk is merged with the bearing housing structure, where the housing itself serves as part of the damping system. This integration eliminates the need for separate damping components, reducing assembly complexity while maintaining effective vibration and noise reduction.
Solution Approach 2:
The damping disk performs multiple functions simultaneously: it dampens radial vibrations, absorbs axial impacts, and reduces noise. This multi-functionality consolidates several potential components into a single element, thereby reducing overall device complexity while achieving comprehensive vibration and noise control.
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
The solution effectively reduces noise and improves steering behavior by damping vibrations and impacts, enhancing the stability and performance of the steering system.
Implementation Method 1
the damping disk is composed at least partially of a vibration- and impulse-damping material
Implementation Method 2
the damping disk is composed at least partially of a vibration- and impulse-damping material
Implementation Method 3
The spring element is embodied as a wave spring, a diaphragm spring, a spiral spring or in some other way as a spring element
Data Source
AI summary
A bearing assembly for bearing a steering shaft includes a bearing housing, a bearing, and a damping disk. The housing has two housing sections. The bearing is integrated into the damping disk. The damping disk is positioned so that an inner wall of a first housing section radially supports a circumferential side of the damping disk, and such that a second housing section is axially supported by the damping disk.