Bearing Assembly with Torque-Disengaging Support Structures
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Solution Overview
Problem
Conventional bearing assemblies in drive trains are prone to failure due to issues like lack of lubrication, dirt accumulation, and misalignment, leading to abrupt vehicle stops when anomalies occur, requiring costly axle cutting or vehicle hoisting for repair.
Innovation Solution
A bearing assembly with a second race having a varying radius and support structures that disengage from a housing when a threshold torque is exceeded, allowing the second race to rotate and continue vehicle motion, while a controller analyzes operational parameters to detect anomalies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bearing assembly uses a conventional fixed second race coupled to the housing, then the structural stability is maintained, but the vehicle motion stops abruptly when bearing failure occurs
Solution Approach 1:
The patent transforms the static, fixed second race into a dynamic system where the second race can change its state from fixed to movable. The support structures are designed to transition from a coupled state to a disengaged state when torque exceeds the threshold, allowing the second race to rotate independently and enable continued vehicle motion after bearing failure.
Solution Approach 2:
The patent changes the torque parameter threshold to trigger a state transition. When the torque on the second race exceeds a predetermined threshold value, the support structures disengage, allowing the second race to rotate. This parameter-based trigger mechanism enables the system to adapt its behavior based on operational conditions.
2Strength
If the support structures are designed with high strength to maintain bearing integrity, then the structural strength is improved, but the ability to disengage and allow motion when torque exceeds threshold is reduced
Solution Approach 1:
The support structures are pre-designed with a specific torque threshold in mind during manufacturing. The structures are engineered to have sufficient strength to maintain bearing integrity under normal operating conditions, but are deliberately designed to disengage when torque exceeds a predetermined threshold. This preliminary design approach allows the system to automatically respond to overload conditions.
Solution Approach 2:
The support structures function as sacrificial, disposable components designed to fail in a controlled manner. When torque exceeds the threshold, the support structures disengage or fail, allowing the second race to rotate independently. This deliberate use of short-living, sacrificial components enables the overall system to continue functioning and transport the vehicle to a repair facility.
3Reliability
If conventional bearing assemblies are used without anomaly detection, then the device complexity is reduced, but the ability to detect and respond to bearing failures is lost
Solution Approach 1:
The patent incorporates a controller that receives feedback from sensors monitoring the bearing assembly's operational parameters. The controller analyzes this feedback data to detect anomalies such as unusual torque patterns, vibration, or temperature changes that indicate bearing failure. This feedback loop enables early detection and response to bearing issues.
Solution Approach 2:
The patent replaces purely mechanical anomaly detection methods with an electronic control and sensing system. The controller uses electronic sensors and signal processing to detect bearing failures, substituting complex mechanical detection mechanisms with more sophisticated but integrated electronic monitoring systems.
Data Source
AI summary
A bearing assembly is disclosed. The bearing assembly includes a first race. Further, the bearing assembly includes a second race disposed concentric to the first race, where the second race has a radius that changes along an axial length of the bearing assembly. The bearing assembly also includes a housing disposed around the second race and operatively coupled to the second race. Moreover, the bearing assembly includes a plurality of support structures configured to detachably couple the second race to the housing, where the plurality of support structures are configured to disengage the second race from the housing to allow motion of the second race when a torque on the second race is greater than a threshold torque value.