Hand-held Power Tool Grip with Longitudinal Projections
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Solution Overview
Problem
Existing hand-held power tools, such as disc grinders, have unsatisfactory grip designs that do not effectively improve gripping characteristics, leading to potential slippage during use.
Innovation Solution
A hand-held power tool design featuring a cylindrical housing and a connected cylindrical cover forming a grip with nonslip projections extending along the longitudinal direction, which can be removably attached for maintenance, providing a wider grip area and improved gripping characteristics by utilizing both hands and preventing slippage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If grooves or projections are formed only on the motor housing as a grip, then the gripping characteristics are improved to some extent, but the grip design remains unsatisfactory and slippage can still occur
Solution Approach 1:
The invention merges the motor housing and the rear cover into a unified grip structure. The rear cover is extended in the longitudinal direction to overlap with the motor housing, creating an integrated grip area that combines both components. This merging allows the grip to extend over a larger area, improving both the satisfaction of the grip design and the reliability of gripping characteristics by distributing the gripping force over a wider region.
2Ease of manufacture
If the rear cover is provided as a separate member on the rear end of the motor housing, then wiring parts can be housed, but the grip design is not satisfactory and slipping can occur
Solution Approach 1:
The invention extends the rear cover in the longitudinal direction beyond its conventional position, creating an overlap region with the motor housing. This dimensional extension transforms the rear cover from a simple end-capping component into a dual-function element that both houses wiring parts and contributes to the grip structure. The extended rear cover provides additional grip surface area while maintaining its wiring housing function, thereby improving grip stability without compromising manufacturing ease.
3Ease of repair
If the cylindrical cover is made removable from the housing, then maintenance of motor actuating parts becomes easier, but the structural complexity increases
Solution Approach 1:
The invention segments the power tool into distinct modular components: the housing, the removably attached cylindrical cover, and the motor actuating parts housed within the cover. This segmentation allows the cylindrical cover to be detached from the housing for maintenance purposes, providing easy access to the motor actuating parts. The modular design facilitates maintenance while keeping the attachment structure relatively simple through the use of standard fastening mechanisms.
Data Source
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AI summary
It is an object of the invention to provide an effective technique for improving the gripping characteristics in a hand-held power tool. To solve the problem, a representative power tool (101) is provided to include a motor (111) that drives a tool bit (119), a cylindrical housing (105) that houses the motor, a motor actuating parts that actuates the motor, a cylindrical cover (109) that is connected to one end of the housing in its longitudinal direction and houses the motor actuating parts. A grip (131) to be held by a user of the power tool is defined by the housing and the cylindrical cover. A plurality of projections (133) are formed on the outer surface of the grip in a circumferential direction of the grip and that each projection (133) extends between the housing (105) and the cover (109) in the longitudinal direction of the power tool.