Compact Shock Absorber With Overlapping Polymer Rings
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Solution Overview
Problem
Existing handheld power tools with shock absorbers face challenges in effectively managing high impact loads, often requiring larger damping components or compromising on maximum load capacity.
Innovation Solution
A compact shock absorber design featuring two polymer-based damping rings axially offset and radially overlapping, supported by iron-based discs, which distribute rebound forces efficiently across two damping rings and the housing, reducing internal loads and enhancing load capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single damping ring is used in the shock absorber, then the structure is simpler, but the maximum load capacity is reduced
Solution Approach 1:
The shock absorber is divided into two separate damping rings (first damping ring and second damping ring) that axially offset and radially overlap. Each damping ring independently absorbs impact energy, distributing the load across multiple components rather than concentrating it on a single ring, thereby increasing maximum load capacity while maintaining reasonable structural complexity
Solution Approach 2:
The first and second damping rings are arranged in a nested configuration where they radially overlap while being axially offset. This nested arrangement allows both damping rings to occupy overlapping radial spaces at different axial positions, maximizing space utilization and load distribution within a compact structure
2Strength
If larger damping components are used to handle high impact loads, then the maximum load capacity increases, but the size of the shock absorber increases
Solution Approach 1:
The two damping rings are positioned axially offset but radially overlapping, creating a nested arrangement where the rings share radial space at different axial levels. This nesting allows the shock absorber to achieve high load capacity through multiple damping elements without proportionally increasing the overall volume, as the rings utilize overlapping radial spaces efficiently
Solution Approach 2:
The damping rings are arranged in the axial dimension while maintaining radial overlap, effectively using the axial dimension to stack damping capacity without linearly increasing radial or axial footprint. This dimensional arrangement allows high load capacity in a compact volume by distributing damping function across the axial dimension while sharing radial space
3Volume of moving object
If a compact shock absorber structure is used, then the volume is reduced, but the ability to dampen high loads is compromised
Solution Approach 1:
The compact shock absorber achieves high load dampening capability by segmenting the damping function into two separate damping rings. Each ring contributes independently to load absorption, allowing the compact structure to handle higher loads than a single ring of equivalent size could manage alone
Solution Approach 2:
The nested arrangement of axially offset but radially overlapping damping rings allows both rings to be packed into a compact volume. This configuration maximizes the damping capacity per unit volume by having the rings share radial space at different axial positions, achieving high load dampening in a space-efficient manner
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 design effectively dampens high loads with a compact structure, outperforming single-damping-ring systems by distributing forces evenly across multiple components, thereby reducing internal stress and increasing maximum load capacity.
Implementation Method 1
two polymer-based damping rings that are axially offset and radially overlapping
Implementation Method 2
two polymer-based damping rings that are axially offset and radially overlapping
Implementation Method 3
two iron-based discs that are arranged axially between the damping rings
Data Source
Figure 1~2
AI summary
A machine tool is disclosed. The machine tool has a tool receptacle for receiving a tool on a working axis, a housing, and a striking mechanism. An impact stop is provided for a beater or an intermediate beater. An impact absorber has two polymer-based absorber rings that are offset axially to one another and are disposed so that they overlap radially and has two iron-based disks disposed axially between the absorber rings.