Power Tool Vibration Reduction via Nested Shearing Member
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Solution Overview
Problem
Existing power tools do not effectively reduce vibration, as current vibration reduction mechanisms are not sufficient for improving user comfort and tool performance.
Innovation Solution
A power tool design featuring a first housing with a motor and a second housing handle, where a vibration reduction member, typically rubber, undergoes shearing deformation to reduce vibration transmission between the housings, and is cooled by a cooling air passage to enhance durability, while maintaining ease of gripping and dust protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a vibration reduction mechanism is added to the power tool, then vibration transmission is reduced, but the device complexity increases
Solution Approach 1:
The vibration reduction member is nested within the housing structure, specifically positioned between the first housing (motor housing) and the second housing (handle). The second cylindrical portion of the second housing covers the first cylindrical portion of the first housing, creating a nested configuration where the vibration reduction mechanism is integrated into the existing housing design without requiring separate external components.
Solution Approach 2:
The vibration reduction member is made of elastic material (rubber or elastic resin) that can deform elastically to absorb and reduce vibration. The member is configured as a hollow cylindrical shell or ring-shaped structure that flexes in response to vibration forces, utilizing the properties of flexible shells to reduce vibration transmission while maintaining structural integrity.
2Object-affected harmful factors
If the vibration reduction member is made of elastic material, then vibration is reduced through elastic deformation, but heat is generated during operation
Solution Approach 1:
A cooling air passage is introduced as an intermediary cooling medium between the vibration reduction member and the surrounding environment. Air flows through the hollow interior of the vibration reduction member, acting as a heat transfer medium that carries heat away from the elastic material during compression and expansion cycles, thereby preventing excessive heat buildup.
Solution Approach 2:
The cooling system utilizes pneumatic principles by forcing air through the vibration reduction member using a cooling fan. The air flow through the hollow passage provides convective cooling to the elastic material, leveraging fluid dynamics to manage thermal energy generated during vibration reduction operations.
3Shape
If the second housing covers the first housing, then the structure is compact and protective, but heat dissipation becomes difficult
Solution Approach 1:
The vibration reduction member is designed with a hollow interior structure that allows air flow through it. This porous-like internal structure enables the member to serve dual functions: providing vibration reduction through elastic deformation and facilitating heat dissipation through air cooling passages, without compromising the compact nested housing structure.
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 power tool achieves improved vibration reduction through shearing deformation of the vibration reduction member, enhanced durability due to cooling, and maintains user-friendly gripping and dust protection.
Implementation Method 1
a vibration reduction member which is provided between the first cylindrical portion and the second cylindrical portion and which reduces transmission of vibration between the first housing and the second housing via elastic shearing deformation of the vibration reduction member
Implementation Method 2
via elastic shearing deformation of the vibration reduction member
Implementation Method 3
the vibration reduction member is located at the cooling air passage and cooled by an air flowing through the cooling air passage, which flowed by means of a cooling motor fan
Data Source
Figure 1
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AI summary
A power tool for performing a predetermined operation by using a tool (119) driven by a motor (111) comprising a first housing (103) to which the tool (119) is attached at an end of the first housing (103) and which has a cylindrical portion (105) of the first housing (103), a second housing (109) which has a cylindrical portion (151) of the second housing covering the cylindrical portion (105) of the first housing (103), and a vibration reduction member (155) which is provided between the cylindrical portion (105) of the first housing (103) and the cylindrical portion (151) of the second housing (109) and which reduces transmission of vibration between the first housing (103) and the second housing (109) via elastic shearing deformation of the vibration reduction member (155) . A direction of the shearing deformation of the vibration reduction member (155) corresponds to a direction of a rotation axis of the motor (111).