Leaf Spring Silencer with Metal Insert for Wear Resistance
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Solution Overview
Problem
Existing silencers for commercial vehicle leaf spring assemblies experience significant wear and shape deformation due to repeated buffering operations, leading to changes in spring constants that cause discomfort and noise, and potential breakage of leaf springs due to direct contact with bolts.
Innovation Solution
A silencer design featuring an upper rubber body with a metal insert and integrated lower rubber body, incorporating buffering protrusions and an inclined surface to absorb shocks and distribute loads, preventing direct contact with metal components and maintaining structural integrity through vulcanization molding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rubber members are used for buffering operation and noise prevention, then buffering function and noise prevention function are improved, but wear and shape deformation occur due to repeated operations
Solution Approach 1:
The silencer uses a composite structure combining rubber material and metal insert. The rubber portion provides buffering and noise prevention functions, while the metal insert embedded within the rubber body provides structural support and maintains shape integrity during repeated compression operations, preventing excessive deformation and wear.
Solution Approach 2:
The silencer is designed with predetermined compression characteristics and shape recovery capability. The rubber material and metal insert are configured to withstand repeated compression cycles from road vibrations, providing beforehand protection against shape deformation and maintaining consistent buffering performance over time.
2Force
If spring constant is increased to support load, then load supporting capability is improved, but discomfort and shock are transmitted to driver and passenger
Solution Approach 1:
The silencer utilizes the dynamic viscoelastic properties of rubber material that allow it to exhibit different stiffness characteristics under different loading conditions. During normal operation, the rubber provides flexible buffering, while under heavy loads, the metal insert engages to provide additional structural support, creating a dynamic response that balances load support with comfort.
Solution Approach 2:
The silencer design changes the effective spring constant based on operating conditions. The rubber material provides initial compliance for comfort, while the metal insert provides additional stiffness when needed for load support. This parameter change approach allows the system to adapt to different driving conditions without transmitting excessive shock.
3Device complexity
If silencer structure is simplified, then manufacturing cost is reduced, but wear leads to direct contact between metal components causing noise and breakage
Solution Approach 1:
The silencer merges the rubber buffering element and metal support structure into a single integrated component. The metal insert is embedded within the rubber body during molding, creating a unified structure that prevents direct contact between metal components (such as bolts and leaf springs) even when wear occurs, thereby preventing noise and breakage without requiring complex additional protective structures.
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 silencer effectively buffers road vibrations, reduces noise, and maintains shape integrity by distributing loads through multistage buffering and stress dispersion, smoothing the transition between spring constants, thereby enhancing driving comfort and preventing leaf spring breakage.
Implementation Method 1
an upper rubber body (110) and a lower rubber body (120) integrated by vulcanization molding
Implementation Method 2
The silencer effectively buffers road vibrations, reduces noise
Implementation Method 3
incorporating buffering protrusions and an inclined surface to absorb shocks and distribute loads
Data Source
AI summary
A silencer for a leaf spring for a commercial vehicle is provided. The silencer includes an upper rubber body having defined therein a fitting hole into which a second leaf spring is press-fitted, with a top surface of the upper rubber body serving as a contact surface in contact with a first leaf spring, and a lower rubber body having defined therein an accommodation space, with a first buffering protrusion being provided on a bottom surface of the lower rubber body such that a third leaf spring is able to be in contact with the first buffering protrusion.