Impact Tool Handle Vibration Damping via Elastic Elements
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Solution Overview
Problem
Existing impact tools experience significant vibrations in both axial and transverse directions during operation, affecting the usability and vibration-proofing of the handle.
Innovation Solution
The impact tool incorporates a motor-driven striking mechanism with elastic elements connecting the outer shell housing to the tool body and handle, allowing for movement in both axial and transverse directions, reducing vibrations through strategically placed first and second elastic elements and a dynamic vibration reducer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the handle is rigidly connected to the tool body, then the structural stability is improved, but the vibration in axial direction increases
Solution Approach 1:
A second elastic element (damping element) is introduced as an intermediary between the handle and the outer shell housing. This elastic element specifically targets and dampens vibrations in the axial direction (striking direction), allowing the handle to remain stable during operation while reducing harmful axial vibrations transmitted to the user's hand.
Solution Approach 2:
The patent changes the mechanical parameter of the connection between the handle and outer shell housing by introducing elasticity through the second elastic element. This transforms the rigid connection into a flexible one that can accommodate axial vibrations, effectively changing the vibration transmission characteristics while maintaining structural integrity.
2Stability of the object's composition
If the outer shell housing is rigidly connected to the tool body, then the structural stability is improved, but the vibration in transverse direction increases
Solution Approach 1:
A first elastic element (damping element) is introduced as an intermediary between the outer shell housing and the tool body. This elastic element specifically targets and dampens vibrations in the transverse direction (direction perpendicular to the striking direction), allowing the outer shell housing to maintain its structural position while reducing harmful transverse vibrations.
Solution Approach 2:
The patent changes the mechanical parameter of the connection between the outer shell housing and tool body by introducing elasticity through the first elastic element. This transforms the rigid connection into a flexible one that can accommodate transverse vibrations, effectively changing the vibration transmission characteristics while maintaining structural integrity.
3Object-affected harmful factors
If elastic elements are added to reduce vibration, then the vibration-proofing is improved, but the device complexity increases
Solution Approach 1:
The vibration reduction system is segmented into two independent elastic elements: a first elastic element for transverse direction vibration reduction and a second elastic element for axial direction vibration reduction. This segmentation allows each element to be optimized for its specific direction, simplifying the design compared to a single complex vibration isolation system that would need to handle all directions simultaneously.
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
This configuration effectively reduces vibrations in all directions, enhancing the usability and vibration-proofing of the handle by individually adjusting the stiffness of the elastic elements and utilizing a dynamic vibration reducer to minimize axial and transverse vibrations.
Implementation Method 1
a first elastic element which elastically connects the outer shell housing to the tool body such that the outer shell housing can move in a direction transverse to the axial direction of the tool bit with respect to the tool body
Implementation Method 2
a second elastic element which connects the handle to the outer shell housing such that the handle can move in the axial direction of the tool bit with respect to the tool body
Implementation Method 3
a dynamic vibration reducer which reduces vibrations in an axial direction of the tool bit
Data Source
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AI summary
A technique for improving the vibration-proof effect and usability of a handle is provided in an impact tool. An impact tool is provided which linearly drives a tool bit 119 in an axial direction thereof to cause the tool bit 119 to perform a predetermined hammering operation. The impact tool includes a motor 111, a striking mechanism part 113, 115 that is driven by the motor 111 and causes the tool bit 119 to linearly move, a tool body 103 that houses the motor 111 and the striking mechanism part 113, 115, an outer shell housing 102 that covers at least part of the tool body 103 and is connected to the tool body 103 via a vibration-proofing first elastic element 153, 155, 157, 159 so as to be movable in a direction transverse to the axial direction of the tool bit 119 with respect to the tool body 103, and a handle 109 which is designed to be held by a user and connected to an opposite side of the outer shell housing 102 from the tool bit 119 via a vibration-proofing second elastic element 123 so as to be movable in the axial direction of the tool bit 119 with respect to the outer shell housing 102.