Reciprocating Tool Counterweight Layout for Vibration Suppression
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Solution Overview
Problem
Conventional reciprocating tools, such as saber saws, experience vibrations in both the reciprocating direction and orthogonal directions due to the counterweight configuration, affecting work performance and processing precision.
Innovation Solution
The design incorporates a system with two rotary bodies, where the center of gravity of the first and second rotary bodies are positioned to rotate in opposite directions, with the first rotary body having a protruding part and a connecting part, and the second rotary body having a second gear part with a weight, to cancel out vibrations by adjusting the mass distribution and centrifugal forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the center of gravity of rotary bodies is positioned to rotate in opposite directions, then vibrations in both reciprocating and orthogonal directions are suppressed, but device complexity increases
Solution Approach 1:
The two counterweights are integrated into a single gear structure, forming a unified counterweight assembly. This merging approach allows the complex vibration control function to be achieved within an integrated component rather than requiring separate mechanisms, thereby reducing overall device complexity while maintaining the dual-directional vibration suppression capability.
Solution Approach 2:
The gear with integrated counterweights serves multiple functions: it transmits mechanical power from the motor to the reciprocating mechanism and simultaneously performs vibration control in both reciprocating and orthogonal directions through the strategically positioned counterweights. This multi-functionality reduces the need for additional dedicated vibration control 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
This configuration effectively reduces vibrations in both the reciprocating and orthogonal directions, enhancing work performance and processing precision by optimizing the mass distribution and movement of the center of gravity.
Implementation Method 1
the center of gravity of the first rotary body and the center of gravity of the second rotary body rotates in opposite directions from each other, suppressing vibrations in a direction orthogonal to the reciprocating direction
Data Source
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AI summary
Providing a reciprocating tool capable of reducing vibrations generated during operations and improving work performance and processing precision. A reciprocating tool includes a transmission gear part 61 and a counter weight part 62. The transmission gear part 61 includes a bevel gear 611 and a weight 611A. The bevel gear 611 is rotatable in a first direction about an axis B by receiving a drive force of a motor 3. The weight 62A is rotatable in a second direction opposite to the first direction about the axis B by receiving the drive force of the motor 3. A center of gravity 61G of the transmission gear part 61 and a center of gravity 62G of the counter weight part 62 are separated farthest from a blade mounting part 8 when the blade mounting part 8 is positioned in a rearward position. The center of gravity 61G of the transmission gear part 61 and the center of gravity 62G of the counter weight part 62 are closest to the blade mounting part 8 when the blade mounting part 8 is positioned in a forward position.