Motor Buffering Plate for Vehicle Air Conditioner Noise
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Solution Overview
Problem
Conventional motors used in on-vehicle air conditioners experience collision sounds between the shaft and thrust plate due to external forces, such as those encountered when driving on rough roads, which disrupt the motor's operation and passenger comfort.
Innovation Solution
Incorporating a buffering plate with elastic properties opposite to the thrust plate to absorb the shock and reduce the collision sound generated when the shaft returns to its original position after being displaced by external forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rotor and stator are disposed with a given distance to generate magnetic restoring force, then the motor maintains stable operation and resists gravitational variation, but collision sound occurs when external force exceeds the restoring force
Solution Approach 1:
The buffering plate is introduced as an intermediary component between the thrust plate and the motor housing. This mediator absorbs the collision energy when the shaft returns to its original position after being displaced by external forces, thereby reducing the collision sound while maintaining the magnetic restoring force structure for stable operation
Solution Approach 2:
The buffering plate is pre-installed in the motor housing at the position where the thrust plate will contact during collision. This beforehand cushioning structure is prepared in advance to absorb the impact energy when collision occurs, preventing the harmful collision sound from propagating
2Volume of moving object
If ball bearings are removed to downsize the motor, then the motor size is reduced, but the shaft directly contacts the thrust plate causing collision sound
Solution Approach 1:
The buffering plate serves as an intermediary between the thrust plate and motor housing, absorbing collision energy without adding significant volume to the motor. This allows the motor to remain compact while eliminating the harmful collision sound that would otherwise occur with direct shaft-thrust plate contact
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 buffering plate effectively reduces the collision sound between the shaft and thrust plate, enhancing motor stability and passenger comfort by mitigating the impact of external forces, allowing for a quieter operation of the on-vehicle air conditioner.
Implementation Method 1
a buffering plate having elastic force... allows the buffering plate to buffer this shock
Implementation Method 2
magnetic restoring force to act between the rotor and the stator... allows magnetic restoring force to act between the rotor and the stator
Data Source
AI summary
A motor includes a shaft, a rotor mounted to the shaft along an axial direction of the shat, a stator confronting an outer wall of the rotor via a space, a thrust plate, and a buffering plate having elastic force. The rotor and the stator are disposed such that a magnetic center of the rotor is away from a magnetic center of the stator by a given distance along the axial direction. The thrust plate is disposed in the axial direction and in a direction along which restoring force acts. The buffering plate is disposed oppositely to the shaft relative to the thrust plate and supports the thrust plate.