Chuck Jaw Locking Structure for Fast, Firm Sub Jaw Replacement
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Solution Overview
Problem
Conventional chuck devices require cumbersome and unstable attachment of sub jaws to master jaws, making it difficult to replace them efficiently and ensuring secure grip during workpiece rotation or processing.
Innovation Solution
A chuck device design featuring a chuck main body with a locator and master jaw that includes a recessed portion and locking mechanism, and a sub jaw with a biasing member and plates that securely attach to the master jaw using an elastic force, allowing for easy attachment and detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sub jaws are attached to master jaws using conventional methods, then the attachment structure is simple, but the attachment is not firm and replacement is cumbersome
Solution Approach 1:
The attachment mechanism is divided into separate functional components: a recessed portion in the master jaw, a biasing member with elastic force, an insertion member, and a locked portion. This segmentation allows each component to perform its specific function independently, achieving both firm attachment and easy replacement.
Solution Approach 2:
The biasing member provides dynamic elastic force that automatically engages the insertion member with the recessed portion and secures the locked portion. This dynamic mechanism ensures firm attachment during operation while allowing quick release when needed, resolving the contradiction between attachment firmness and replacement ease.
2Stability of the object's composition
If sub jaws are firmly attached to master jaws, then workpiece grip stability is improved, but the complexity of the attachment structure increases
Solution Approach 1:
The biasing member with elastic force automatically performs the attachment function by pushing the insertion member into the recessed portion and engaging the locked portion. This self-service mechanism achieves stable workpiece grip without requiring complex manual attachment procedures or additional control systems.
Solution Approach 2:
The insertion member acts as an intermediary element that transmits the elastic force from the biasing member to secure the locked portion in the recessed portion. This intermediary component simplifies the overall structure by providing a direct mechanical connection that ensures grip stability without complex mechanisms.
3Loss of time
If sub jaws are easily replaceable, then replacement time is reduced, but the attachment firmness during operation is compromised
Solution Approach 1:
The locked portion is pre-configured to engage with the recessed portion under the elastic force of the biasing member before operation begins. This preliminary engagement ensures attachment firmness is established in advance, while the simple release mechanism allows quick replacement when needed, minimizing replacement time.
Solution Approach 2:
The elastic force from the biasing member creates a dynamic attachment system that maintains firm engagement during operation but allows rapid release. The spring-loaded mechanism naturally holds the sub jaw firmly during machining while enabling quick replacement by simply overcoming the elastic force, resolving the time-firmness 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
This design reduces the burden of replacing sub jaws and ensures a firm attachment, facilitating efficient processing by simplifying the attachment process and enhancing the stability of the workpiece grip during rotation.
Implementation Method 1
an insertion member inserted into the recessed portion from a direction parallel to the axis by an elastic force of the elastic member
Data Source
AI summary
A master jaw of the chuck device includes a recessed portion recessed in a direction parallel to an axis of a spindle, and a locking portion provided outside the recessed portion in a direction orthogonal to the axis. The sub jaw includes an insertion member inserted into the recessed portion from a direction parallel to the axis by an elastic force of an elastic member, a plate located on a side opposite to the biasing member in a state of being attached to the master jaw and clamping the master jaw between the plate and the insertion member inserted into the recessed portion, and a locked portion configured to come into contact with and be locked to the locking portion from an inside in a direction orthogonal to the axis in a state in which the insertion member is inserted into the recessed portion.