Elastomer Belt Pulley Structure for Vibration Damping and Alignment
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Solution Overview
Problem
Belt pulleys with existing damping solutions, such as rubber damping rings, suffer from non-coaxial alignment issues between the outer ring and inner disk, leading to asynchronous operation of input and output shafts and potential belt slippage due to vibration-induced noise and instability.
Innovation Solution
An annular spring body with a smaller radial wall thickness in the central section compared to the end face sections is used, ensuring distance stability and effective vibration damping by allowing the outer ring to tilt relative to the inner disk while maintaining coaxial alignment, utilizing elastic material like elastomers or rubber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a rubber damping ring is used to dampen vibrations, then vibration damping and noise reduction are improved, but the coaxial alignment between outer ring and inner disk deteriorates leading to asynchronous operation
Solution Approach 1:
The patent changes the physical parameters of the damping element by using an elastomeric material with specific viscoelastic properties instead of a rigid rubber ring. The elastomer's ability to deform and recover allows it to dampen vibrations while maintaining the coaxial alignment between outer ring and inner disk, thus resolving the contradiction between vibration damping and alignment precision
Solution Approach 2:
The patent employs composite construction by combining the elastomeric damping layer with the metallic outer ring and inner disk components. The elastomer is integrated between these rigid components, creating a composite structure that provides both vibration damping capability and structural stability for maintaining coaxial alignment
2Object-affected harmful factors
If a soft rubber damping ring is used to achieve desired damping properties, then noise immission reduction is improved, but the radial distance between outer ring and inner disk becomes unstable
Solution Approach 1:
The patent modifies the material parameters by selecting elastomers with controlled durometer values and viscoelastic properties. These parameter adjustments allow the damping layer to provide noise reduction while maintaining stable radial distance, as the elastomer's controlled compliance prevents excessive deformation under operational loads
3Object-affected harmful factors
If the belt tension is reduced due to vibration, then vibration damping is improved, but the risk of tooth skipping increases
Solution Approach 1:
The elastomeric damping layer acts as an intermediary element between the outer ring and inner disk. It absorbs and dissipates vibration energy before these vibrations can affect the belt-t pulley tooth engagement, thus reducing vibrations without compromising the reliability of tooth engagement by isolating the interference
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 provides enhanced distance stability and effective vibration damping, reducing noise emissions and preventing belt slippage, ensuring a quiet and stable operation of the belt drive system.
Implementation Method 1
an annular spring body (14) made of elastomeric material, which is arranged between the outer ring (6) and the inner disk (12) and connects them to one another
Implementation Method 2
Vibrations that occur in the area between the belt and the outer ring can be dampened by the damping ring before they hit the hub or shaft
Data Source
Figure 1~2
Figure 3~4
Figure 5~8
AI summary
The invention relates to a belt pulley (2) for a belt drive (4), with an outer ring (6) which has a circumferential receiving area (8) radially on the outside for receiving a belt (10), an inner disk (12) which is coaxially outer ring (6) and designed for attachment to a shaft, and an annular spring body (14) made of elastic material, which is arranged between the outer ring (6) and the inner disc (12) and connects them to one another, the spring body (14 ) in the axial direction X on each of its end faces (16) has an end face section (18) and between the end face sections (18) a middle section (20), and wherein a radial wall thickness W1 of the middle section (20) is smaller than a radial wall thickness W2 of each of the end face sections (18) is. The invention also relates to a belt drive (4) which has at least one belt pulley (2) of this type.