Auxiliary Handle Elastic Structure for Hammer Drill Vibration Reduction
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Solution Overview
Problem
Existing auxiliary handles for hammer drills transmit vibrations easily to the grip, causing discomfort and fatigue to the user.
Innovation Solution
An auxiliary handle with an elongated, elastically deformable attachment that is windable around the drill, a threaded shaft connected to a basal portion, a cylindrical base, and a grip that covers the base, designed to reduce vibrations by attenuating and tilting relative to the drill body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the attachment unit and grip are integral with each other as a single member, then the structure is simple, but vibrations are easily transmitted to the grip
Solution Approach 1:
The auxiliary handle is divided into multiple independent components: the attachment unit, threaded shaft, base, and grip are separate parts that can be assembled and disassembled. This segmentation allows each component to be optimized independently and interrupts the direct vibration transmission path between the attachment unit and grip.
Solution Approach 2:
The threaded shaft acts as an intermediary component connecting the attachment unit to the base and grip. This intermediate element provides a connection point that can absorb and attenuate vibrations, preventing direct transmission from the attachment unit to the grip.
2Strength
If the attachment unit and grip are integral with a screw, then the connection is secure, but vibrations are transmitted through the fastening portion
Solution Approach 1:
The connection structure is segmented into the threaded shaft (with external threads) and the base (with internal threads). This separation allows the connection to maintain strength through the threaded engagement while interrupting the rigid vibration transmission path that would exist in a fully integral structure.
Solution Approach 2:
The connection method transitions from a simple rigid joint to a threaded connection with multiple engagement points. This changes the mechanical parameters of the connection, providing both strength through thread engagement and vibration attenuation through the distributed connection geometry.
3Object-affected harmful factors
If vibrations are reduced by adding vibration-damping components, then user comfort is improved, but device complexity increases
Solution Approach 1:
The auxiliary handle is segmented into multiple components (attachment unit, threaded shaft, base, grip), where each component serves both structural and vibration-damping functions. This segmentation achieves vibration reduction without requiring additional dedicated damping components, as the modular structure itself provides vibration attenuation.
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 reduces vibrations transmitted to the grip, enhancing user comfort and reducing fatigue by attenuating and tilting the grip relative to the drill body.
Implementation Method 1
an attachment (22) being elongated and elastically deformable, the attachment being windable around an outer circumference of the work tool
Data Source
AI summary
An auxiliary handle for a work tool reduces vibrations transmitted to a grip. An auxiliary handle for a work tool is an auxiliary handle detachably attachable to the work tool. The auxiliary handle includes an attachment being elongated, elastically deformable, and windable around an outer circumference of the work tool, a threaded shaft including a basal portion connected to two ends of the attachment, a base being cylindrical and receiving the threaded shaft, a distal member being adjacent to a distal end of the base and receiving a distal end of the threaded shaft screwed into the distal member, and a grip being cylindrical and covering the base.