Preassembled Mounting Mechanism for Hand Tool Protective Hoods
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Solution Overview
Problem
Existing hand-held power tools with protective hoods require numerous elements for axial and radial fixing, leading to high assembly costs and limiting the use of different protective hoods without significant design changes.
Innovation Solution
A preassembled fastening arrangement comprising an axial support and rotary lock, detachably connected to the device housing, allows for separate manufacturing and easy replacement, enabling the use of various protective hoods on the same tool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate elements are used for axial and radial attachment of the protective cover, then the protective cover can be securely fixed, but the assembly effort and device complexity increase significantly
Solution Approach 1:
The patent combines the axial support and rotary locking mechanism into a single integrated mounting assembly that attaches to the housing as one unit. This merging of previously separate components reduces the total number of parts while maintaining both axial positioning and rotational locking functions, thereby reducing assembly complexity without compromising the secure fixing of the protective cover.
2Reliability
If the entire hand tool is adapted to a specific protective cover, then the protective cover can be properly secured, but the versatility to use different protective covers is lost
Solution Approach 1:
The mounting assembly is designed as a universal interface that can accommodate different protective covers through standardized attachment points. The integrated design with detachable connection to the housing allows the same mounting assembly to work with various protective cover types, enabling the hand tool to securely attach different covers without requiring tool-specific adaptations for each cover type.
Solution Approach 2:
The patent separates the mounting assembly from both the housing and the protective cover, creating an independent modular component. This segmentation allows the mounting assembly to serve as a universal adapter that can be configured for different protective covers while remaining attached to the housing, thereby enabling versatility without compromising secure attachment.
3Reliability
If numerous separate components are used for protective cover attachment, then secure fixing is achieved, but production costs and assembly time increase
Solution Approach 1:
By merging the axial support and rotary locking mechanism into a single pre-assembled unit that attaches to the housing in one operation, the patent significantly reduces the number of assembly steps. Instead of separately installing multiple axial and radial attachment elements, workers now install one integrated mounting assembly followed by the protective cover, thereby improving productivity while maintaining secure fixation.
Data Source
Figure 1
Figure 2
AI summary
The hand tool has a motor (6) housed in a housing (4). Tools (8) are propelled around an axis (A) by the motor with a work piece part (12) rising out for a disk-shaped tool. A protection hood (22) for the partial cover of the tool is defined being held opposite the housing and axially supported (32) toward the axis and being rotatable around the axis. At the housing a turning lock (40) is provided which has a bolting device position. The axial support and the turning lock are components of a pre-mountable attachment arrangement (20), which connect to the equipment housing.