Removable Drill Chuck Axial Locking Collar Mechanism
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Solution Overview
Problem
Existing drills lack the ability to efficiently switch between operation modes with and without a chuck, limiting versatility and convenience for users who need to quickly change between different bits.
Innovation Solution
A drill design featuring a removable chuck with a locking collar that can be axially moved between locking and release positions, allowing for easy attachment and detachment without removing the bit from the spindle, along with a compact storage feature for the chuck.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the chuck is made removable to enable quick switching between bit modes, then the versatility and ease of operation are improved, but the device complexity increases due to the locking mechanism
Solution Approach 1:
The chuck is segmented into a removable portion and a retained portion, allowing the removable portion to be detached when bit mode switching is needed while the retained portion remains on the spindle. This segmentation enables versatility without requiring complete chuck removal, thereby limiting the increase in device complexity.
Solution Approach 2:
The locking mechanism is extracted as a separate functional component within the chuck assembly, specifically as a locking collar that can engage or disengage from the spindle. This allows the locking function to be added without complicating the overall chuck design, as the locking collar is a self-contained element that integrates smoothly with the removable portion.
2Reliability
If the locking collar is designed to retain the chuck securely on the spindle, then the reliability is improved, but the ease of operation deteriorates due to difficulty in release
Solution Approach 1:
The locking collar is designed with dynamic movement capability, allowing it to shift axially between a locked position (engaging the groove for secure retention) and an unlocked position (disengaged for easy removal). This dynamic design enables the collar to provide strong retention when needed while allowing quick release when the user actuates the release mechanism, thus maintaining both reliability and ease of operation.
3Length of moving object
If the drill is designed to maintain compact size with chuck attached, then the portability is improved, but the versatility deteriorates due to limited access to bit changing options
Solution Approach 1:
The chuck is divided into removable and retained portions, allowing users to remove only the necessary components for bit changes while keeping the compact drill body intact. This segmentation maintains the compact axial length when the chuck is attached but enables versatile bit mode switching when the removable portion is detached, resolving the contradiction between compactness and adaptability.
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 quick and efficient switching between bit modes, maintaining a compact size even when the chuck is attached, and providing a convenient storage solution for the chuck when not in use.
Implementation Method 1
The locking collar is biased towards the locking position
Implementation Method 2
The locking collar may be biased towards the locking position
Implementation Method 3
The lock members may be ball bearings. The locking collar may include a plurality of ball bearing interlock projections which project radially inwardly and keep the lock members in the groove when the locking collar is in the locked position
Data Source
AI summary
A power tool including a motor and a rotatable spindle driven by the motor to hold and drive a first bit. There is a recess located on the spindle. The power tool also includes a removable chuck with a lock member and a locking collar. The locking collar includes a locking position in which the locking collar biases the lock member into the recess to retain the chuck on the spindle. The locking collar also includes a release position in which the lock members are able to exit the recess and the chuck is able to be removed from the spindle by a user. The locking collar is axially movable from the locking position to the release position.