Grooved Vibration Motor Damping Member for Stable Linear Motion
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Solution Overview
Problem
Existing vibration motors suffer from reduced vibration performance due to disengagement of the damping member during excessive displacement, leading to instability and noise issues.
Innovation Solution
A vibration motor design featuring a damping member with a groove structure, where the first and second damping portions are arranged on opposite sides of the groove along the vibration direction, effectively improving the bond strength and tensile ductility of the damping member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the damping member is glued on the weight and abuts to the elastic member, then the damping member can reduce noise caused by collision, but the damping member is easily disengaged during rebounding when the vibration unit has excessive displacement
Solution Approach 1:
The damping member is divided into first and second damping portions separated by a groove, with the first damping portion connecting to the elastic member and the second damping portion connecting to the weight. This segmentation allows each portion to independently perform its function while maintaining structural integrity during excessive displacement
Solution Approach 2:
The groove is positioned at a specific location on the damping member, creating local structural differentiation. The first damping portion has different mechanical properties compared to the second damping portion, allowing optimized performance for each function - noise reduction and retention respectively
2Object-generated harmful factors
If the damping member is glued to the elastic member, then the damping member can provide damping function, but due to its low tensile ductility, the damping member is prone to disengage or the stretched damping member may provide greater damping to suppress vibration stability
Solution Approach 1:
By segmenting the damping member into distinct portions with a groove between them, the structure can accommodate tensile deformation without causing complete disengagement. The groove acts as a stress relief feature that prevents catastrophic failure while maintaining the damping function
Solution Approach 2:
The groove structure changes the mechanical parameters of the damping member, specifically improving its effective tensile ductility. The groove allows the material to stretch and deform without breaking the bond between the damping member and the elastic member or weight, even when low tensile ductility material is used
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 improved damping member design enhances the vibration stability of the motor by reducing damping after tensile deformation and preventing detachment during vibration, thus maintaining consistent performance.
Implementation Method 1
an elastic member configured to suspend the weight in the receiving space, including: a first fixation portion fixed to the housing; a second fixation portion fixed to the weight; and an elastic portion connecting the first fixation portion and the second fixation portion
Implementation Method 2
a damping member sandwiched between the elastic portion and the weight, having a groove penetrating thereon... The damping member is configured to reduce noise caused by collision between the weight and the elastic member during vibration
Data Source
AI summary
The present disclosure discloses a linear motor having a housing with an receiving space, a vibration unit and a stator unit received in the receiving space. The vibrator unit includes a weight and an elastic member fixed to the weight. The elastic member includes a first fixation portion fixed to the housing and a second fixation portion fixed to the weight and an elastic portion. An elastic member having a groove penetrating thereon is sandwiched between the elastic portion and the weight. The elastic member includes a first damping portion and a second damping portion arranged on two opposite side f the groove along a vibration direction. The groove can effectively avoid the detachment of the elastic member from the elastic member and the weight, thus improving the vibration stability of the vibration motor.