Power Tool Handle Vibration Isolation via Movable Guide Structure
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Solution Overview
Problem
Existing power tools face challenges in reducing vibration transmission to the handle while maintaining compact size, as the movement of housing units to prevent vibration transmission often results in increased tool size.
Innovation Solution
A power tool design featuring a motor, driving mechanism, body housing, and a handle that can move longitudinally with respect to the body housing, utilizing a biasing member to reduce vibration transmission, along with a rotation restricting mechanism and guide elements to stabilize handle movement and prevent rotation, allowing for size reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If multiple guide elements are spaced apart in the longitudinal direction to stabilize handle movement, then vibration transmission is prevented, but the housing unit size and overall tool size increase
Solution Approach 1:
The patent combines multiple guide elements into a single integrated guide structure that maintains the vibration isolation function while reducing the overall space required. The guide structure includes multiple guide surfaces arranged to provide stabilization without requiring separate spaced-apart elements, thus merging their functions into a compact configuration.
Solution Approach 2:
The guide structure is designed to be nested within the existing housing unit geometry, utilizing available internal spaces and integrating with the handle assembly. This nesting approach allows the guide elements to be positioned without increasing the external dimensions of the housing unit, effectively hiding the vibration isolation mechanism within the existing form factor.
2Stability of the object's composition
If the housing unit extends to the front end region to integrate the main handle, then structural stability is improved, but the tool size increases
Solution Approach 1:
The patent introduces a movable handle assembly that can shift position along the longitudinal axis of the tool. This dynamic configuration allows the handle to be positioned closer to the front end during operation for better control, while maintaining structural stability through the guide structure. The handle's ability to move adjusts the effective length without compromising stability.
Solution Approach 2:
Instead of extending the housing unit linearly in the longitudinal direction, the patent utilizes the radial dimension by positioning guide elements on the circumferential surfaces of the housing unit. This dimensional shift allows structural stability to be achieved through radial bracing and guide surfaces rather than longitudinal extension, keeping the tool length compact.
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 effectively reduces vibration transmission to the handle and achieves size reduction by using a biasing member and guide elements, while maintaining handle stability and preventing rotation, thus enhancing user comfort and tool compactness.
Implementation Method 1
a biasing member disposed between the body housing and the handle. The handle is biased by the biasing member in the longitudinal direction of the tool bit
Data Source
AI summary
A power tool includes a motor, a driving mechanism, a body housing, a handle, and a rear position defining member. The driving mechanism is driven by the motor and configured to drive a tool bit in a longitudinal direction. The body housing houses the motor and the driving mechanism. The handle is connected to the body housing so as to be allowed to move with respect to the body housing between a front position and a rear position in the longitudinal direction, while being biased by a biasing member in the longitudinal direction. The handle includes a handle base and a handle cover. The rear position defining member extends from the body housing to a position between the handle base and the handle cover in the longitudinal direction and is configured to define a rear position of the handle.