Lathe Jaw Assembly With Captive Fastener for Quick Jaw Changes
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Solution Overview
Problem
Existing woodturning lathe jaw assemblies are time-consuming and costly to switch between different jaw sets due to the need for multiple chucks and cumbersome bolt mounting systems, especially when working with smaller chucks where bolts are hard to reach and prone to being dropped.
Innovation Solution
A jaw assembly featuring a first jaw set with an axially extending channel for quick attachment and release of a second jaw set via a captive fastener, allowing for easy interchangeability without changing the lathe chuck, reducing the need for multiple chucks and simplifying the mounting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional bolt mounting systems are used to attach jaw sets to chucks, then secure clamping is achieved, but the mounting process becomes time-consuming and bolts are prone to being dropped
Solution Approach 1:
The jaw set is divided into multiple modular jaw members that can be independently attached to the chuck. Each jaw member can be mounted separately using a simplified fastening system, reducing the overall time required compared to mounting a complete jaw set as a single unit.
Solution Approach 2:
The jaw members are pre-configured with integrated fastening features and positioning elements during manufacturing. This preliminary preparation eliminates the need for separate alignment and fastening operations during mounting, significantly reducing assembly time while maintaining secure attachment.
2Adaptability or versatility
If multiple chucks are used to accommodate different jaw sets for various material sizes, then versatility is improved, but cost increases
Solution Approach 1:
The jaw members are designed with universal mounting features that allow them to be attached to different sizes of chucks using the same fastening system. This multi-functionality enables a single chuck to accommodate multiple jaw sets of varying sizes and configurations, eliminating the need for multiple specialized chucks.
Solution Approach 2:
Smaller jaw members can be nested within or alongside larger jaw members on the same chuck, allowing different sized jaw sets to be stored and quickly exchanged without requiring separate chucks for each size category.
3Reliability
If traditional lateral screwing of bolts is used to mount chucks to lathes, then secure attachment is achieved, but the bolts are hard to reach and easy to drop
Solution Approach 1:
The fastening system transitions from lateral screwing to axial insertion through the jaw member. This dimensional change in the fastening direction provides improved accessibility, allowing operators to easily reach and operate the fastening mechanism from the end of the jaw member rather than reaching laterally into confined spaces.
Solution Approach 2:
A captive retaining element acts as an intermediary between the fastener and the jaw member, preventing the fastener from detaching or being dropped during operation. This intermediary component maintains secure attachment while allowing easy access and operation of the fastening mechanism.
Data Source
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AI summary
The present disclosure provides a jaw assembly for mounting to a lathe spindle. The jaw assembly comprises a first jaw set (10) with at least one axially extending jaw portion (15) which comprises a channel (16) extending in the same axial direction as the jaw portion (15), and a second jaw set (30) locatable within and releasably attached to the first jaw set (10) via at least one fastener (40) locatable in the channel (16).