Impact Tool Holder Chuck Collar for Easy Bit Release
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Solution Overview
Problem
Existing power tools face challenges in efficiently and easily replacing bits due to the complexity of conventional chuck mechanisms, which often require significant external force or specialized tools for bit removal and replacement.
Innovation Solution
A tool holder system with a chuck collar that can be rotated or axially moved to align ball bearings for locked and unlocked configurations, utilizing springs and detent mechanisms to facilitate easy bit replacement without external force, and incorporating a retaining ring and resilient members for secure bit retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional chuck mechanisms are used for bit retention, then tool holder stability is maintained, but bit replacement requires significant external force and specialized tools
Solution Approach 1:
The chuck mechanism is segmented into distinct functional components: retention members (balls) that can move independently between locked and unlocked positions, a chuck collar for actuation, and a spindle for support. This segmentation allows each component to perform its specific function efficiently, enabling easy bit replacement while maintaining overall mechanism stability.
Solution Approach 2:
The retention members are designed to be dynamically movable between fixed positions (locked and unlocked) rather than being statically fixed. This dynamic capability allows the mechanism to transition between states of high retention force and easy bit removal, resolving the contradiction between stability and ease of operation.
2Reliability
If conventional chuck mechanisms are used for bit retention, then secure bit holding is achieved, but bit removal requires specialized tools and significant force
Solution Approach 1:
The retention members act as intermediaries between the chuck collar and the bit. When the chuck collar rotates, it moves the retention members, which in turn control bit retention. This intermediary mechanism allows indirect actuation of bit release, enabling easy removal without requiring direct application of significant force or specialized tools.
Solution Approach 2:
The mechanism is designed to be self-actuating through the rotation of the chuck collar, which automatically positions the retention members to either retain or release the bit. This self-service capability eliminates the need for external tools or excessive force, allowing users to easily replace bits while maintaining secure holding during operation.
3Stability of the object's composition
If retention members are positioned to secure the bit, then tool holder stability is maintained, but bit replacement becomes difficult
Solution Approach 1:
The retention members transition between static locked positions (providing stability) and dynamic unlocked positions (enabling replacement). This dynamic design allows the system to maintain stability during operation while facilitating easy bit replacement when needed, resolving the contradiction between these two requirements.
Solution Approach 2:
The chuck mechanism operates through periodic action: the chuck collar rotates to periodically engage and disengage the retention members, creating alternating states of secure retention and easy release. This periodic cycling between stable and replaceable states allows the tool holder to maintain stability during use while enabling straightforward bit replacement when the cycle transitions to the unlocked state.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables easy and secure bit replacement in power tools, reducing the need for external force and simplifying the process, while maintaining tool holder stability during operation.
Implementation Method 1
a resilient member positioned between the retaining ring and the chuck collar
Data Source
AI summary
A tool holder for a rotary impact tool can include a plurality of retention members, an anvil movably received in a spindle and configured to impact a bit, the spindle defining a longitudinal axis and including a channel extending along the longitudinal axis, and a plurality of slots that open into the channel and are sized to receive the plurality of retention members, and a chuck collar that is rotatable about the longitudinal axis to selectively place the tool holder in an unlocked configuration and a locked configuration. The chuck collar can include a plurality of sockets sized to receive the plurality of retention members. The plurality of retention members can be recessed in the plurality of sockets in the unlocked configuration and extend through the plurality of slots into the internal volume in the locked configuration.