Electric Tool Housing With Isolated Cable Maintenance Access
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Solution Overview
Problem
Hand-held electric power tools, such as angle grinders, face challenges in maintaining wear-prone parts like power cables without compromising the operational readiness of other components, as opening the housing risks contamination and damage to sensitive parts.
Innovation Solution
A housing design with a maintenance cover that allows access to the power cable end and line contacts while keeping the majority of the interior closed, enabling efficient maintenance of wear-prone parts with reduced risk to other components, using a separable maintenance cover that can be connected via screws and a hinge mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the housing is opened for maintenance of the power cord end, then access to wear-prone parts is improved, but contamination risk to sensitive components increases
Solution Approach 1:
The housing is divided into two separable parts: a first housing part containing sensitive components and a second housing part (maintenance cover) that can be opened independently. This segmentation allows maintenance access to the power cord end without exposing the entire housing interior, thus resolving the contradiction between ease of repair and contamination risk.
2Ease of repair
If the entire housing is opened for maintenance, then all components become accessible, but operational readiness risk increases due to exposure of sensitive parts
Solution Approach 1:
The housing is segmented into a first housing part with sensitive components and a second housing part that serves as a maintenance cover. This allows selective access to wear-prone parts while keeping sensitive components protected, maintaining operational readiness while enabling repair access.
Solution Approach 2:
The maintenance cover is extracted as a separate, independently openable component from the main housing. This extraction enables focused access to specific maintenance areas without requiring opening of the entire housing, thus protecting sensitive components while maintaining reliability.
3Productivity
If a maintenance opening is provided in the housing, then maintenance efficiency is improved, but structural integrity and protection are reduced
Solution Approach 1:
The housing is segmented into two parts where the second housing part functions as a removable maintenance cover. This segmentation creates a dedicated maintenance access point without compromising the overall structural integrity of the first housing part containing sensitive components.
Solution Approach 2:
The maintenance cover is designed to be dynamically openable and closable, transitioning between closed (protective) and open (accessible) states. This dynamic design allows the housing to maintain protection during normal operation while enabling efficient maintenance when needed.
Data Source
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AI summary
The invention relates to a housing (20) for an electric hand tool (1), in particular for an angle grinder, with a housing opening (23) for a power cable end (10) and with a maintenance opening (31) that can be closed by a maintenance cover (50) to allow manual access to the line contacts (15) of the power cable end (10) located under the maintenance cover (50). The invention also relates to an electric hand tool formed with this housing.