Auxiliary Handle Mounting Structure for Compact Power Tools
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Solution Overview
Problem
Conventional power tools with auxiliary handles face challenges such as increased longitudinal length, interference with workpieces, and slippage due to the fixed mounting of auxiliary handles at the front portion, which is not suitable for small size tools that require increased torque and stability.
Innovation Solution
The power tool design incorporates an auxiliary handle mounting structure positioned between the rear end and the grip portion, overlapping the motor unit, allowing for a compact design without increasing the tool's length, and featuring a through-hole for secure attachment to prevent misalignment and slippage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the auxiliary handle is fixed to the front portion of the housing, then the mounting structure is simple, but the longitudinal length of the housing increases
Solution Approach 1:
The auxiliary handle mounting structure transitions from a longitudinal arrangement (front portion of housing) to a transverse arrangement (side portion of housing). This dimensional change allows the auxiliary handle to be mounted without increasing the longitudinal length of the housing, while maintaining a relatively simple mounting structure through the use of a mounting plate and fastening members.
2Ease of manufacture
If the auxiliary handle is mounted at the front portion of the housing, then the mounting is straightforward, but the auxiliary handle interferes with workpieces that bulge towards the power tool
Solution Approach 1:
The mounting position of the auxiliary handle is relocated from the front portion (longitudinal dimension) to the side portion (transverse dimension) of the housing. This positional change in another dimension eliminates interference with workpieces that bulge towards the power tool, while the mounting remains straightforward through the use of a mounting plate and fastening members attached to the side surface of the housing.
3Device complexity
If the auxiliary handle slides onto the outer surface of the housing, then the attachment is simple, but the handle may slip off or become misaligned under large torque
Solution Approach 1:
The attachment structure is segmented into multiple functional components: a mounting plate attached to the side surface of the housing, and fastening members that connect the auxiliary handle to the mounting plate. This segmentation allows for a relatively simple overall structure while providing reliable attachment through the distributed fastening system that prevents slippage and misalignment under large torque.
Solution Approach 2:
The mounting plate is pre-attached to the side surface of the housing before the auxiliary handle is installed. This preliminary action creates a stable base structure that ensures proper positioning and alignment, preventing misalignment issues that would occur with direct sliding attachment, while maintaining attachment simplicity through the modular design.
4Adaptability or versatility
If space is provided in the front portion of the housing for the auxiliary handle, then the auxiliary handle can be mounted, but the overall length of the power tool increases making it difficult to use in confined spaces
Solution Approach 1:
The auxiliary handle mounting is relocated from the longitudinal dimension (front portion of housing) to the transverse dimension (side portion of housing). This allows the auxiliary handle to be mounted on the side surface of the housing without increasing the overall longitudinal length of the power tool, maintaining adaptability for various applications while enabling use in confined spaces.
Data Source
AI summary
A power tool includes a main body portion and a grip portion. The main body portion includes a motor unit. The grip portion extends from the main body portion between a front end and a rear end of the main body portion. The main body portion further includes an auxiliary handle mounting structure disposed between the rear end of the main body portion and a rearmost end of a region where the grip portion meets the main body portion. An auxiliary handle member is coupled to the auxiliary handle mounting structure of the main body portion.