Vibration Damper Hub With Reinforcing Plate
Solution Overview
Problem
Existing vibration dampers for internal combustion engines, typically made of cast iron, are heavy, have high inertia, and are costly, necessitating a lighter and less expensive alternative.
Innovation Solution
A vibration damper assembly featuring a lightweight steel hub with a reinforcing plate and reduction holes, providing a stronger joint and reduced weight, inertia, and noise through strategically placed mounting and dowel holes, and optional unbalance configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a cast iron hub is used in the vibration damper, then the structural strength and inertia are improved, but the weight and manufacturing cost increase significantly
Solution Approach 1:
The hub is divided into two functional segments: a lightweight outer hub structure made of aluminum or aluminum alloy, and a separate reinforcing plate made of steel or other high-strength material. These segments are assembled together through mounting holes and fasteners, combining the weight advantages of aluminum with the strength advantages of steel, thereby resolving the contradiction between weight reduction and structural strength maintenance.
Solution Approach 2:
The vibration damper hub employs a composite structure combining dissimilar materials: an aluminum or aluminum alloy hub body with a steel or high-strength material reinforcing plate. This composite construction allows the lightweight aluminum hub to provide weight reduction while the steel reinforcing plate provides the necessary structural strength, effectively resolving the technical contradiction between minimizing weight and maintaining strength.
2Strength
If a cast iron hub is used in the vibration damper, then the structural strength is improved, but the manufacturing cost increases
Solution Approach 1:
The hub structure is segmented into a lightweight aluminum hub and a separate reinforcing plate, allowing each component to be manufactured using optimal processes for its material. The aluminum hub can be cast or formed efficiently, while the reinforcing plate can be stamped or formed separately, and then assembled together. This segmentation enables cost-effective manufacturing by avoiding the high material and processing costs associated with casting entire hubs in heavy, expensive materials like cast iron.
Solution Approach 2:
The composite construction of an aluminum hub with a steel reinforcing plate allows the use of lower-cost aluminum for the bulk of the hub structure, while only the critical reinforcement areas use more expensive high-strength materials. This selective material application reduces overall manufacturing cost compared to using cast iron throughout, while still providing the necessary structural strength.
3Weight of moving object
If the hub weight is reduced, then the manufacturing cost and inertia are improved, but the structural integrity and joint strength deteriorate
Solution Approach 1:
The hub is segmented into a lightweight aluminum structure and a separate reinforcing plate that is specifically designed to reinforce the mounting areas. The reinforcing plate is positioned and fastened through mounting holes to provide localized strength enhancement at the joints, allowing the overall hub weight to remain low while the critical joint areas achieve the necessary strength for secure attachment to the crankshaft.
Solution Approach 2:
Rather than making the entire hub heavy and strong, the reinforcing plate applies local quality enhancement only where needed - specifically at the mounting holes and joint areas. The aluminum hub maintains its lightweight properties in non-critical areas, while the steel or high-strength reinforcing plate provides concentrated strength reinforcement at the joints, resolving the contradiction between overall weight reduction and localized joint strength.
Data Source
AI summary
A reinforcing plate (405) is utilized with a lightweight hub (101) in a vibration damper. Holes (105) formed in the hub (101) and the reinforcing plate (405) allow the vibration damper to be mounted to a shaft with a stronger joint than when the reinforcing plate (405) is not utilized, thereby preventing deformation of the hub (101). Optional reduction holes (111) formed in the hub (101) provide for additional weight reduction, vibration reduction, and/or noise reduction.