Chuck Device Locking Mechanism Resolving Vibration Release
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Solution Overview
Problem
Conventional chuck devices fail to reliably lock a rotating jig due to resonance or inertial forces causing unintended release of the locked state during rotational operations.
Innovation Solution
A chuck device with a cylindrical main body, chuck pawls, a nut ring, rolling bodies, a retainer, and rotation restriction bodies that configure a bearing and lock mechanism to securely hold the base shaft of a rotating jig, using rolling bodies as rotation loads to prevent unintended release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lock mechanism with pawls is used to tighten and fix a rotating jig, then the rotating jig can be locked in a tightened state, but resonance or inertial force during rotation may cause unintended release of the locked state
Solution Approach 1:
The patent introduces a rotation restriction body that dynamically switches between restricting and releasing rotation of the retainer based on operational conditions. During rotation, the restriction body engages with the retainer to prevent loosening, while during tightening or release operations, it allows free rotation. This dynamic behavior resolves the contradiction by adapting the locking mechanism's rigidity to the operational phase.
Solution Approach 2:
The retainer acts as an intermediary element between the nut ring and the chuck pawls. It transmits rotational motion during tightening operations while being protected from unintended rotation during drilling operations by the rotation restriction body. This intermediary structure isolates the locking function from harmful vibrations and inertial forces.
2Ease of operation
If the retainer is allowed to rotate freely with the nut ring, then tightening operations can be performed smoothly, but the locking state may be accidentally released during rotation
Solution Approach 1:
The rotation restriction body provides conditional rotation restriction: it engages with the retainer's outer circumferential surface during rotation to prevent loosening, but disengages during tightening operations to allow smooth rotation. This dynamic engagement and disengagement resolves the contradiction between operational smoothness and locking stability.
Solution Approach 2:
The retainer's outer circumferential surface has different functional zones: one area engages with the rotation restriction body to prevent loosening during rotation, while another area allows engagement with the nut ring for tightening operations. This local differentiation of functional properties resolves the contradiction.
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
The device reliably locks the base shaft without carelessly releasing the holding state, ensuring secure rotation and preventing accidental loosening during drilling or other operations.
Implementation Method 1
a plurality of rolling bodies which roll while being sandwiched between the nut ring and the chuck main body
Data Source
AI summary
[Problem]A chuck device capable of reliable locking with a simple structure is provided.[Solution]A chuck device (1) including a plurality of balls (41); a retainer (42) which holds the balls (41) so as to be rolled; a spring ring (34) configured to rotate together with a nut ring (33) and to switch between a rotation restricted state in which the retainer (42) is restricted in a loosening direction (L) and a restriction released state in which the restriction of the retainer (42) in the loosening direction (L) is released; and a one-way spring (31) which restricts the retainer (42) in the loosening direction (L) relative to a chuck body (11), in which the plurality of balls (41), the retainer (42) and the one-way spring (31) configure a one-way bearing mechanism (50) restricted in the loosening direction (L) provided between the nut ring (33) and the chuck body (11), and the retainer (42) in the rotation restricted state configures a bearing and lock mechanism (30).