Percussion Tool Counterweight Linkage for Vibration Attenuation
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Solution Overview
Problem
Percussion tools experience significant vibration during operation, which can be uncomfortable for the operator and potentially lead to fatigue, and existing anti-vibration systems are inadequate in effectively attenuating these vibrations.
Innovation Solution
The percussion tool incorporates an anti-vibration system with a linkage mechanism that allows relative movement between the housing and the percussion mechanism, featuring a counterweight that reciprocates out of phase with the striker to attenuate vibrations, along with a leaf spring and foam bumper to further reduce vibration transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an anti-vibration system is added to the percussion tool, then vibration transmission to the operator is reduced, but the device complexity increases
Solution Approach 1:
The patent employs a counterweight mechanism where a balance weight is positioned to reciprocate out of phase with the striker, creating opposing inertial forces that cancel out vibrations transmitted to the operator. This directly addresses the harmful vibration effect while maintaining a relatively simple mechanical structure integrated into the existing percussion mechanism.
Solution Approach 2:
The patent utilizes mechanical vibration principles by designing the counterweight to oscillate at the same frequency as the striker but in opposite phase. This creates destructive interference of vibration waves, reducing the net vibration transmitted to the operator while adding minimal complexity to the overall system.
2Object-affected harmful factors
If a linkage mechanism permitting relative movement is implemented, then vibration attenuation is improved, but the device complexity increases
Solution Approach 1:
The patent implements a dynamic linkage mechanism that allows relative movement between the percussion mechanism and housing during operation. The linkage includes pivoting arms and connecting rods that adapt their configuration based on the operational phase, providing optimal vibration attenuation while maintaining structural integrity and avoiding excessive complexity.
Solution Approach 2:
The linkage mechanism acts as an intermediary element between the percussion mechanism and the housing, allowing controlled relative movement that isolates vibrations. This mediator structure absorbs and dissipates vibrational energy while maintaining the functional connection between components, reducing overall system complexity compared to rigid coupling.
3Object-affected harmful factors
If multiple anti-vibration components (leaf spring, foam bumper) are added, then vibration transmission is reduced, but the device complexity increases
Solution Approach 1:
The patent combines multiple anti-vibration components (leaf spring, foam bumper, and counterweight mechanism) into an integrated system where each component performs a complementary function. The leaf spring provides elastic support, the foam bumper offers shock absorption, and the counterweight creates opposing vibrational forces, collectively reducing vibration transmission while maintaining manageable system complexity through functional integration.
Solution Approach 2:
The patent employs composite anti-vibration structures combining different materials with complementary properties - the leaf spring uses elastic metal material for reversible deformation, while the foam bumper utilizes viscoelastic foam material for energy dissipation. This composite approach maximizes vibration attenuation effectiveness while keeping the overall device complexity controlled through material selection rather than additional mechanical components.
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 anti-vibration system significantly reduces vibration transmission to the operator by up to 10%, enhancing comfort and reducing operator fatigue, while also protecting the tool from accidental drops by absorbing impact through guard members.
Implementation Method 1
The anti-vibration system includes a counterweight supported by the percussion mechanism for relative movement therewith along a second axis that is parallel with the first axis. The counterweight reciprocates out of phase with the striker to attenuate vibration in the direction of the first axis.
Implementation Method 2
The anti-vibration system includes a leaf spring arranged between the housing and the crank case. Each of the leaf spring and the foam bumper attenuates vibration transmitted to an operator through the crank case and the housing.
Implementation Method 3
The anti-vibration system includes a foam bumper arranged between the housing and the crank case. Each of the leaf spring and the foam bumper attenuates vibration transmitted to an operator through the crank case and the housing.
Data Source
AI summary
A percussion tool includes a housing, a percussion mechanism including a striker supported for reciprocation in the housing along a first axis, and an anti-vibration system for attenuating vibration in a direction of the first axis. The anti-vibration system includes a linkage coupling the percussion mechanism to the housing. The linkage permits relative movement between the housing and the percussion mechanism along the first axis. The anti-vibration system also includes a counterweight supported by the percussion mechanism for relative movement therewith along a second axis that is parallel with the first axis. The counterweight reciprocates out of phase with the striker to attenuate vibration in the direction of the first axis.