Oscillating Power Tool Adjustable Transmission Mechanism
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Solution Overview
Problem
Existing oscillating power tools lack the ability to adjust oscillating angles, leading to instability and increased risk of failure when used for different operational functions.
Innovation Solution
An oscillating power tool with a transmission mechanism comprising an eccentric device and a shifting fork assembly, along with an adjusting mechanism that allows the output shaft to oscillate at multiple angles by selectively engaging with different drive members, ensuring stability and adaptability to various working requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single fixed oscillating angle is used in the transmission mechanism, then the structure is simple, but the tool cannot adapt to different operational functions and has increased failure risk
Solution Approach 1:
The patent implements a dynamic oscillating angle adjustment mechanism where the shifting fork assembly can move between multiple positions (first position, second position, etc.) to change the oscillating angle of the output shaft. The adjusting mechanism includes a shifting fork member with a shifting fork body that can be repositioned along the drive shaft axis, allowing the tool to adapt from a fixed single angle to a variable multi-angle configuration, directly resolving the contradiction between adaptability and structural simplicity.
Solution Approach 2:
The transmission mechanism is designed with multiple drive members (first drive member, second drive member, etc.) positioned at different locations on the drive shaft, each corresponding to a different oscillating angle. By selectively engaging the shifting fork with different drive members, a single tool can perform multiple operational functions (sawing, cutting, grinding, scraping) with different oscillating angles, achieving multi-functionality without requiring multiple separate tools.
2Adaptability or versatility
If the oscillating angle is fixed, then the structure is stable, but the tool cannot meet diverse operational needs
Solution Approach 1:
The patent introduces a dynamic adjustment capability that allows the oscillating angle to be changed during operation. The shifting fork assembly can be repositioned between multiple fixed positions, each corresponding to a stable oscillating angle configuration. This dynamic adjustability enables the tool to meet diverse operational needs while maintaining structural stability at each selected angle position, preventing failure by allowing angle optimization for different working conditions.
Solution Approach 2:
The oscillating angle is changed by varying the engagement position between the shifting fork and different drive members on the drive shaft. By changing the positional parameter of the shifting fork assembly along the drive shaft axis, the tool can select from multiple discrete oscillating angles (first oscillating angle, second oscillating angle, etc.), enabling adaptation to different operational requirements while maintaining reliable operation at each selected angle.
3Adaptability or versatility
If multiple drive members are added to enable angle adjustment, then versatility increases, but the device complexity increases
Solution Approach 1:
Multiple drive members are integrated into the eccentric device, with each drive member positioned at a different location on the drive shaft to provide a different oscillating angle. The shifting fork assembly serves as a universal engagement mechanism that can selectively connect to any of the drive members, allowing a single component (shifting fork) to control multiple functions (different oscillating angles), thereby increasing versatility while limiting the growth of overall device complexity.
Solution Approach 2:
The drive shaft is segmented with multiple discrete drive members positioned at different locations, allowing the oscillating mechanism to be divided into multiple selectable configurations. The shifting fork assembly is segmented into a shifting fork body and supporting members that can independently position themselves to engage with different drive members, enabling angle adjustment through modular segmentation rather than a completely reconfigurable system, thus managing complexity.
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 tool achieves stability and versatility by allowing the output shaft to oscillate at multiple angles, meeting diverse operational needs without prone failure, enhancing its operational reliability.
Implementation Method 1
the eccentric device comprises at least two drive members, the shifting fork assembly comprises a shifting fork member connected to the output shaft and a supporting member movably connected to the shifting fork member
Data Source
AI summary
An oscillating power tool, including a housing; a motor; a drive shaft driven by the motor; an output shaft driven by the drive shaft; a transmission mechanism for converting rotary motion of the drive shaft into oscillation of the output shaft, wherein the transmission mechanism includes an eccentric device mounted on the drive shaft and a shifting fork assembly connecting the eccentric device with the output shaft; the eccentric device includes at least two drive members, the shifting fork assembly includes a shifting fork member connected to the output shaft and a supporting member movably connected to the shifting fork member, the supporting member includes a matching portion, the oscillating power tool further includes an adjusting mechanism disposed in the housing, and the adjusting mechanism operably adjusts the supporting member to move, such that the matching portion is selectively abutted against different drive members.