Reciprocating Tool Vibration Control with Offset Weights
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Solution Overview
Problem
Reciprocating tools generate significant vibration along the driving axis, which existing vibration control mechanisms fail to adequately mitigate, leading to inefficient operation and user discomfort.
Innovation Solution
A reciprocating tool design incorporating a motor, driving mechanism, body housing, movable part, and vibration control mechanism with offset weights and elastic members, where the movable part is connected via elastic members to absorb and reduce vibration by offsetting the center of gravity from the driving axis, thereby minimizing vibration transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a reciprocating tool is configured to linearly drive a tool accessory using a reciprocating member, then the tool can perform hammering or scraping operations, but significant vibration is generated in the direction of the driving axis
Solution Approach 1:
The patent applies the counterweight principle by introducing a vibration control mechanism with weights that move in opposition to the reciprocating member. The vibration control mechanism includes a first weight and a second weight positioned at different locations, where the weights generate counterbalancing forces that offset the vibration generated during reciprocating operation, thereby reducing harmful vibrations while maintaining tool functionality
2Object-affected harmful factors
If existing vibration control mechanisms are used, then some vibration reduction is achieved, but vibration along the driving axis is not adequately mitigated
Solution Approach 1:
The patent segments the vibration control function by dividing the vibration control mechanism into multiple independent weights (first weight and second weight) positioned at different locations relative to the driving axis. This segmentation allows each weight to independently contribute to vibration cancellation in different directions, providing comprehensive vibration control that addresses the insufficiency of conventional single-mechanism approaches
Solution Approach 2:
The patent extends vibration control from a single-axis approach to multi-dimensional control by positioning weights at different locations relative to the driving axis. The first weight and second weight are arranged such that they can counteract vibrations in both the driving axis direction and orthogonal directions, adding dimensional complexity to the vibration control strategy
3Object-affected harmful factors
If the movable part is connected to the body housing via elastic members, then vibration is absorbed and reduced, but the structure becomes more complex
Solution Approach 1:
The elastic members serve multiple functions simultaneously: they provide the necessary mechanical connection between the movable part and body housing, enable relative movement along the driving axis, and absorb vibration through their elastic deformation. This multi-functionality reduces the need for separate vibration isolation components, thereby limiting the increase in structural complexity while achieving effective vibration absorption
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
Effectively reduces vibration along both the driving axis and orthogonal directions, enhancing tool stability and user comfort during operations like hammering or scraping.
Implementation Method 1
The movable part is connected to the body housing via a first elastic member and a second elastic member such that the movable part is movable relative to the body housing in the first direction between an initial position and a closer position
Implementation Method 2
The vibration control mechanism includes at least one weight. The at least one weight is configured to move in a direction opposite to the reciprocating member in response to the reciprocation of the reciprocating member
Data Source
AI summary
A reciprocating tool includes a motor, a driving mechanism, a body housing, a movable part, and a vibration control mechanism. The driving mechanism includes a reciprocating member configured to reciprocate in a first direction. The movable part is connected to the body housing via a first elastic member and a second elastic member to be relatively movable in the first direction. The vibration control mechanism includes at least one weight configured to move in a direction opposite to the reciprocating member. The center of gravity of the at least one weight is offset from the driving axis in a second direction. In the second direction, the first elastic member is closer to the center of gravity than the second elastic member. A load of the first elastic member when the movable part is placed in a closer position is smaller than a load of the second elastic member.