Coaxial Motor Damping Ring for Disc Brake Actuator Noise
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Solution Overview
Problem
Electric gear motors in disc brake actuators often generate vibrations and noise, causing discomfort and potential damage, which existing technologies have not adequately addressed.
Innovation Solution
A geared motor group with a damping device comprising axial and radial damping elements, made of ethylene-propylene-diene monomer, positioned on the electric motor to absorb movements and reduce vibrations and noise, featuring coaxial crowns and a connecting ring for effective damping in both axial and radial directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the electric motor is mounted in the housing without damping elements, then the structure is simple and easy to manufacture, but vibrations and noise are generated causing discomfort and potential damage
Solution Approach 1:
A damping device is introduced as an intermediary element between the electric motor and the housing. This device includes a first crown with radial damping elements and a second crown with axial damping elements, both made of elastomeric material. The damping device absorbs vibrations in radial and axial directions, reducing noise and harmful effects without significantly complicating the overall structure.
Solution Approach 2:
The damping device is made of elastomeric material (such as ethylene-propylene-diene monomer) that combines rubber-like vibration absorption properties with structural form. This composite material approach allows the damping elements to effectively reduce vibrations and noise while maintaining a relatively simple device structure.
2Object-affected harmful factors
If damping elements are added to reduce vibrations and noise, then harmful factors are reduced, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The damping device combines multiple damping functions into a single integrated component. The first and second crowns are radially connected by a connecting ring, forming a unified damping device that provides both radial and axial damping. This merging approach reduces the number of separate parts and simplifies assembly, making the device easier to manufacture despite the added damping functionality.
Solution Approach 2:
The damping device serves multiple functions simultaneously: it provides radial damping through the first crown, axial damping through the second crown, and structural support through the connecting ring. This multi-functionality reduces the need for separate damping components, thereby simplifying the overall manufacturing process while effectively reducing noise and vibrations.
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 significantly reduces motor vibrations and noise emissions by blocking movements in both axial and radial directions, leading to a decrease in noise intensity by 2dB.
Implementation Method 1
a damping device capable of being positioned on an end portion of the electric motor comprising an element for axial damping of movements of the motor along said axial direction and an element for radial damping of movements of the motor along a radial direction of the electric motor
Implementation Method 2
the first crown and the second crown are radially connected to each other by a connecting ring, the first crown being positioned inside the second crown and bearing against a first shoulder that the end of the motor has
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a noise-damping device (1) for a geared motor unit (2) comprising a housing (3) containing an electric motor (4), having an axis, and a reduction mechanism (5), the device comprising two coaxial rings (11, 12), connected radially to one another by a connection ring (13), comprising a first ring (11) positioned inside a second ring (12), said damping device (1) being able to be positioned at an end part of the electric motor (4), the first and second rings being arranged against the end part of the electric motor (4) so as to damp the movements of the electric motor (4) in the housing (3) in radial and axial directions.