Multi-Motion Accessory With Switchable Eccentric Rotation
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Solution Overview
Problem
Power tools used for cleaning often have limitations such as being restricted to a specific type of motion and having complex drive units or mechanical structures to provide multiple types of motion, which can lead to inefficiencies and increased costs.
Innovation Solution
A multi-motion accessory with an attachment member, fastener, locking member, and eccentric member that allows the attachment member to rotate about a central axis in a locked position and an eccentric axis in an unlocked position, enabling the accessory to provide various modes of motion like spinning, random orbital, and orbital motions without additional drive components in the power tool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a power tool uses a single driving shaft with an accessory, then the device complexity is reduced, but the accessory can only perform a particular type of motion
Solution Approach 1:
The accessory employs a dynamic locking mechanism that can switch between locked and unlocked states. When unlocked, the attachment member rotates about the central axis of the driving shaft for spinning motion. When locked, the eccentric member engages with the locking member, causing the attachment member to rotate about an offset axis for orbital motion. This dynamic state change allows a single accessory to provide multiple motion types without increasing drive unit complexity.
2Adaptability or versatility
If an accessory provides multiple types of motion, then the adaptability is improved, but the mechanical structure becomes relatively complex
Solution Approach 1:
The invention merges the functions of multiple motion mechanisms into a single integrated accessory assembly. The attachment member, eccentric member, locking member, and driving shaft work together as one unified mechanism. The eccentric member's offset geometry inherently provides both spinning and orbital motions through its interaction with the locking member, eliminating the need for separate mechanical systems for each motion type.
Solution Approach 2:
The accessory is designed as a universal multi-functional component that can perform both spinning and orbital cleaning motions. The attachment member serves dual purposes: it directly rotates on the central axis for spinning, and simultaneously orbits around the workpiece when the locking member engages with the eccentric member. This multi-functionality is achieved without requiring multiple separate accessories or complex additional drive components.
3Adaptability or versatility
If a power tool uses additional drive components to provide multiple motions, then the motion versatility is improved, but the cost increases
Solution Approach 1:
The accessory is self-sufficient in generating multiple motion types without requiring additional drive components in the power tool. The eccentric member's offset geometry automatically converts the single-axis rotation from the driving shaft into two distinct motion patterns (spinning and orbital) through the engagement and disengagement of the locking member. This self-service capability eliminates the need for expensive additional motors, gears, or control systems.
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 multi-motion accessory allows for multiple motion modes using a single driving shaft, reducing the complexity and cost of the power tool's drive unit and enabling versatile cleaning actions by simply transitioning the locking member between locked and unlocked positions.
Implementation Method 1
The eccentric member includes a first slot that receives the locking member, a second slot that receives a driving shaft, and a third slot that receives the fastener. The second slot of the eccentric member is structured to align with the central axis of the attachment member. The third slot of the eccentric member is structured to align with the eccentric axis of the attachment member.
Data Source
AI summary
An accessory includes an attachment member, a fastener, a locking member, and an eccentric member. The attachment member has a central axis, which is perpendicular to a first surface of the attachment member. The fastener is connected to at least the attachment member. The locking member is movable into at least (a) a locked position in which the locking member is engaged with the attachment member such that the attachment member is configured to rotate about the central axis, and (b) an unlocked position in which the locking member is disengaged from the attachment member such that the attachment member is configured to rotate about an eccentric axis. The eccentric axis is offset from the central axis. The eccentric member includes a first slot that receives the locking member, a second slot that receives the driving shaft, and a third slot that receives the fastener. The second slot of the eccentric member is structured to align with the central axis of the attachment member. The third slot of the eccentric member is structured to align with the eccentric axis of the attachment member.