Auxiliary Handle Vibration Isolation via Fulcrum Lever
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Solution Overview
Problem
Existing auxiliary handles for reciprocating power tools do not effectively prevent vibration transmission to the user, as the rotation of the grip part can control the rotation of the power tool, limiting their performance.
Innovation Solution
An elongate auxiliary handle with a mounting part, a movable part, and a connection part is designed to be detachably attached to a reciprocating power tool, featuring a base between the grip and connection parts, which allows the movable part to move relative to the mounting part with the connection part as a fulcrum, utilizing a restoring force from an elastic element to enhance vibration-proofing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the grip part is held by the user directly without a base, then the structure is simpler, but the amount of movement of the grip part is limited and vibration transmission is not effectively reduced
Solution Approach 1:
The auxiliary handle is divided into three main segments: the mounting part attached to the power tool body, the movable part including the grip part, and the connection part linking them. This segmentation allows each part to perform its specific function - the mounting part provides stable attachment, the connection part acts as a fulcrum for movement, and the movable part absorbs vibration through relative motion, thereby reducing vibration transmission to the user.
Solution Approach 2:
The connection part serves as an intermediary element between the mounting part and the movable part. It functions as a fulcrum that enables the movable part to move relative to the mounting part while maintaining structural connection. This intermediary mechanism allows vibration absorption through controlled movement without completely decoupling the handle from the tool body.
2Object-affected harmful factors
If the connection part and grip part are disposed closer together, then the structure is more compact, but the amount of movement of the grip part is reduced and vibration-proofing performance is compromised
Solution Approach 1:
The handle is designed as an elongate structure extending in a direction crossing the predetermined reciprocation direction of the tool bit. By utilizing spatial arrangement in multiple dimensions and positioning the connection part and grip part on opposite sides of the drive axis, the design maximizes the movement amplitude of the grip part within the available space, enhancing vibration absorption without excessive length.
3Object-affected harmful factors
If the movable part is rigidly fixed to the mounting part, then the structure is more stable, but the grip part cannot move relatively and vibration is transmitted directly to the user
Solution Approach 1:
The connection between the mounting part and movable part is designed to be dynamic rather than rigid. The movable part is held so as to be movable with respect to the mounting part with the connection part as a fulcrum, allowing relative movement in the predetermined direction. This dynamic connection enables the grip part to move in response to vibrations, absorbing shock while maintaining overall structural integrity through the fulcrum-based connection mechanism.
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 significantly reduces vibration transmission to the user by increasing the movement of the grip part relative to the mounting part, improving the overall performance of the auxiliary handle and providing enhanced vibration-proofing.
Implementation Method 1
the movable part is held so as to be movable in the predetermined direction with respect to the mounting part with the connection part as a fulcrum
Implementation Method 2
the movable part is preferably biased toward an initial position by a restoring force of the connection part. In this case, it is preferred to utilize a restoring force of an elastic element such as a spring, rubber or resin.
Implementation Method 3
the movable part is held so as to be movable in the predetermined direction with respect to the mounting part with the connection part as a fulcrum
Data Source
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AI summary
An effective technique for increasing performance of an auxiliary handle which is attached to a power tool is provided. The auxiliary handle 200 has a grip part 210, a grip holding part 220, a mounting part 230 and a support part 240. The grip holding part 220 is disposed between the grip part 210 and the support part 240 in a longitudinal direction of the auxiliary handle 200. When the auxiliary handle 200 is attached to a power tool body, the grip part 210 and the grip holding part 220 are held so as to be movable with respect to the mounting part 230 with the support part 240 as a fulcrum.