Power Tool Collar Mount for Fast Secure Attachment Changes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional handheld electric power tools require screw loosening and tightening for attachment changes, making the process cumbersome and time-consuming.
Innovation Solution
A collar with a cylindrical cross-section is integrated into the output unit, allowing tool-free attachment mounting parallel to the gearhead's longitudinal axis, featuring a collet with recesses for secure positioning and detent seats for rotational locking, along with an auxiliary ring for additional mounting options.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If threaded holes with screws are used for mounting attachments, then the attachment can be securely fixed, but the attachment change process becomes time-consuming and cumbersome
Solution Approach 1:
The mounting mechanism is segmented into a collar with threaded holes and a separate mounting element (screw or bayonet mount) that can be quickly engaged and disengaged. This allows the attachment to be securely fixed when mounted, yet quickly removed when needed, resolving the contradiction between secure fixation and quick changeover.
Solution Approach 2:
The collar with pre-formed threaded holes is prepared in advance as part of the gearhead structure. This preliminary preparation eliminates the need for drilling or complex assembly during attachment change, allowing users to simply screw or bayonet-mount the attachment quickly while maintaining secure fixation.
2Ease of operation
If a collar is added to the gearhead for tool-free mounting, then the attachment change becomes simpler and faster, but the device structure becomes more complex
Solution Approach 1:
The collar is merged with the gearhead as an integrated component rather than a separate attachment. This combining of functions allows tool-free mounting capability to be added without requiring additional separate parts, thus improving ease of operation while minimizing the increase in device complexity.
Solution Approach 2:
The collar serves multiple functions: it provides a mounting surface for attachments, acts as a structural support element, and can incorporate encoding features for tool-free secure mounting. This multi-functionality allows the same component to improve ease of operation without proportionally increasing device complexity.
3Reliability
If encoding features are added to prevent unintentional detachment, then the attachment security is improved, but the manufacturing complexity increases
Solution Approach 1:
Encoding features such as asymmetric recesses or protrusions are added to the collar and corresponding mounting element. These asymmetric features prevent unintentional detachment by allowing mounting in only one orientation, improving retention security while requiring minimal additional manufacturing complexity compared to symmetric designs.
Data Source
AI summary
A handheld electric power tool that is adapted to be driven in oscillation, the handheld electric power tool having a housing and a drive arranged in the housing for driving a toolholder, which is arranged on a tool shaft coupled to the drive and on which a tool is detachably installed. The tool shaft is accommodated in an output unit, which includes a gearhead accommodated in a gearhead housing, and a collar, which is designed so as to make possible a tool-free seating of an attachment in an installation direction oriented parallel to a longitudinal axis of the gearhead, is formed on the output unit.