Rewind Starter Damping Assembly for Vibration Isolation
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Solution Overview
Problem
Conventional rewind starters are prone to premature wear due to vibrations and can be damaged by incorrect use, particularly when engines are running in reverse.
Innovation Solution
A damping assembly for rewind starters, comprising a cover, damper, cover mount, and retaining member, which reduces vibration impact and prevents damage by using resilient materials and selective connections to absorb and dampen engine vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional rewind starters are mounted directly to engine housings, then the structure is simple and easy to install, but the rewind starters are subjected to vibrations that cause premature wear
Solution Approach 1:
A damping assembly is introduced as an intermediary component between the engine housing and the rewind starter. This assembly includes a cover housing with dampers that absorb vibrations from the engine, preventing them from being transmitted to the rewind starter. The damping assembly acts as a mediator that isolates the rewind starter from harmful vibrations while maintaining a relatively simple overall structure.
Solution Approach 2:
The damping assembly incorporates dampers made of resilient material that are pre-installed in the cover housing to cushion and absorb vibrations before they reach the rewind starter. This beforehand cushioning protects the rewind starter from vibration-induced wear and damage, extending its service life without requiring complex active vibration control systems.
2Reliability
If conventional rewind starters are used without protective measures, then the device is simple, but it can be damaged by incorrect use such as pulling the starter when the engine is running in reverse
Solution Approach 1:
The damping assembly is designed to provide preliminary protective action against incorrect use. When the engine is running in reverse, the damping assembly's resilient dampers absorb the reverse rotation forces and prevent them from damaging the rewind starter mechanism. This preliminary anti-action protects the device without requiring complex sensors or control systems to detect and respond to incorrect operation.
3Object-affected harmful factors
If dampers are added to reduce vibrations, then the protection against vibrations is improved, but the device complexity and number of components increase
Solution Approach 1:
The damping assembly merges multiple functions into a single integrated component structure. The cover housing simultaneously serves as the mounting structure for the rewind starter and as the container for the vibration-dampening dampers. This merging reduces the overall number of separate components and simplifies installation while effectively reducing vibration impact on the rewind starter.
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 damping assembly effectively reduces wear and damage to rewind starters by absorbing vibrations and preventing engagement during incorrect use, thereby extending the lifespan and functionality of the starter.
Implementation Method 1
The at least one damper is made of a resilient material... effectively reduces wear and damage to rewind starters by absorbing vibrations
Implementation Method 2
The at least one damper is made of a resilient material... absorbs and dampen engine vibrations
Data Source
AI summary
A damping assembly, which is for a rewind starter of an engine, includes a cover housing, at least one damper, a cover mount and a retaining member. The cover housing is configured to connect to a housing of the engine, and includes a housing base defining an aperture, and a housing wall extending axially from the housing base. The housing wall at least partially surrounds the housing base. The at least one damper is connected to the housing base, and extends at least partially around the aperture. The cover mount is connected to the at least one damper, at least partially extends through the aperture, at least partially covers the aperture, and has a spindle configured to operatively connect to part of the rewind starter. The retaining member retains the cover housing, the at least one damper and the cover mount together.