Disk Brake Friction Lining Damper for Vibration Noise
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Solution Overview
Problem
Existing disc brake systems experience undesirable vibrations and noise due to intermittent frictional contact, which can be exacerbated by additional masses that increase vehicle weight and are not effectively managed by current vibration-modifying elements.
Innovation Solution
A damper system with a coordinated spring and mass arrangement is integrated into or attached to the brake structure, allowing it to oscillate separately and extract vibration energy from the structure, thereby reducing or eliminating noise-relevant vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a rigidly placed additional mass is used to detune vibrations, then vibration reduction is achieved, but vehicle mass increases unnecessarily
Solution Approach 1:
The patent applies the dynamics principle by replacing rigid additional masses with a dynamic damper system comprising a mass mounted on a spring element. This allows the damper mass to oscillate independently and extract vibration energy from the structure through dynamic interaction, achieving vibration reduction without requiring large static mass additions to the vehicle.
Solution Approach 2:
The patent utilizes mechanical vibration principles by designing a damper system where a mass-spring assembly oscillates at a specific frequency to counteract structure-borne noise. The damper mass executes controlled oscillations that are out of phase with the structure's vibrations, thereby canceling out the harmful vibrations through destructive interference.
2Object-affected harmful factors
If conventional vibration-modifying elements are used, then some noise reduction is achieved, but they fail to effectively manage vibrations under changed boundary conditions
Solution Approach 1:
The patent applies parameter changes by carefully selecting and coordinating the spring stiffness and damper mass to achieve a specific natural frequency that targets the problematic vibration frequency range. By adjusting these parameters, the damper system can be tuned to effectively counteract vibrations under various braking conditions and boundary conditions.
Solution Approach 2:
The patent uses the spring element as an intermediary between the damper mass and the structure. This spring mediator allows the damper mass to interact with the structure's vibrations while maintaining independent oscillation capability, enabling effective vibration energy extraction without rigid coupling.
3Loss of energy
If a damper system with separate oscillation capability is implemented, then vibration energy extraction is improved, but device complexity increases
Solution Approach 1:
The patent applies the merging principle by integrating the damper system directly into the friction lining assembly. The damper mass, spring element, and mounting structure are combined into a unified component that is manufactured as a single piece or pre-assembled unit, simplifying installation and reducing overall system complexity despite the advanced vibration control functionality.
Solution Approach 2:
The damper system is designed to be self-regulating, where the damper mass automatically oscillates in response to structure-borne vibrations without requiring external control systems. The system extracts vibration energy passively through the natural oscillation of the mass-spring assembly, eliminating the need for active sensors, actuators, or control algorithms.
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 damper system effectively cancels out disruptive vibrations and noise by executing counter-oscillations, maintaining performance and reducing weight without increasing vehicle mass, and can be efficiently integrated during manufacturing.
Implementation Method 1
The operation of this damping system is based on the fundamental principle that the mass of the damping system, when excited by the defined frequency/frequency band to be addressed, executes a separate, forced oscillation with a separate amplitude, while vibration energy is extracted from the structure's vibration by the excitation of the damping system.
Implementation Method 2
a spring with a predetermined spring stiffness and the predetermined partial mass suspended thereon, which are coordinated with one another and are arranged on the structure S so that they can vibrate elastically
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A friction lining (1) or structure of a vehicle disk brake, comprising an absorption body (14) with a mass MT, with a rear plate (2) comprising hammer-head-shaped projections (7, 8) and friction material (4), which is fastened to the rear plate (2), for bearing against a friction ring, and wherein the projections (7, 8) engage in abutments of receiving recesses in a holder profile for the tangentially fixed holding and the axially displaceable guidance, and therefore introduction of a tangentially directed circumferential force (Fu, friction force) into the holder profile induces a tensile stress in at least one projection (7, 8). An absorption system (9) for suppressing undesirable vibrations is arranged on the friction lining (1).