Drill Chuck Adapter Body for Quick-Change Torque Transmission
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Solution Overview
Problem
The high cost and material usage associated with custom-made chuck bodies in drill chucks, particularly due to increased axial length, hinder economical mass production and quick-change capabilities.
Innovation Solution
Incorporating an adapter body with a torque-transmitting adapter receptacle and detent elements, connected via a threaded joint, allowing for a non-detachable coupling with a drive insert that wedges the thread courses, enabling economic manufacturing and assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a custom-made chuck body with increased axial length is used to provide rotationally fixed coupling, then the quick-change capability is improved, but the manufacturing cost and material usage increase
Solution Approach 1:
The chuck is divided into two separate components: a standard chuck body and an adapter body. The adapter body is the segment that provides the quick-change capability through its adapter receptacle with detent elements, while the main chuck body remains a standard, economically manufacturable component. This segmentation allows the expensive quick-change feature to be isolated to a smaller, replaceable component.
Solution Approach 2:
The adapter body acts as an intermediary component between the standard chuck body and the drilling spindle. It mediates the connection by providing the adapter receptacle with detent elements that enable quick-change capability, while the standard threaded connection between the adapter body and chuck body maintains economic manufacturability. The intermediary adapter body transfers the quick-change function without requiring modification of the entire chuck system.
2Stability of the object's composition
If a custom-made chuck body with increased axial length is used, then the rotationally fixed coupling is improved, but the material usage increases
Solution Approach 1:
The system is segmented into a standard chuck body and a separate adapter body. The adapter body contains the adapter receptacle with detent elements that provide rotationally fixed coupling, while the main chuck body uses minimal material as a standard component. This segmentation concentrates the material usage only where the specialized function is needed, rather than increasing the material usage of the entire chuck body.
Solution Approach 2:
The adapter body is nested into the receptacle of the standard chuck body, creating a compact assembly. The adapter receptacle with detent elements is housed within the adapter body, which itself is threaded onto the standard chuck body. This nested arrangement provides the rotationally fixed coupling function in a space-efficient manner without requiring excessive material usage from the main chuck body.
3Ease of manufacture
If an adapter body with threaded joint and drive insert is used, then the manufacturing economy is improved, but the device complexity increases
Solution Approach 1:
The device is segmented into a standard chuck body, an adapter body with threaded connection, and a separate drive insert. This segmentation allows each component to be manufactured using standard, economically viable processes. The threaded joint between adapter body and chuck body is a simple, well-understood connection that can be mass-produced, while the drive insert is a separate, simple component that can be pressed into place. The overall complexity is managed by dividing the system into standardized, easily manufactured segments.
Solution Approach 2:
The threaded joint between the adapter body and chuck body is designed to be self-securing through the drive insert that wedges the threads when pressed in. This self-service mechanism automatically creates a secure, non-detachable connection without requiring additional complex fastening systems or assembly steps. The wedge action of the drive insert on the threaded courses provides automatic locking and torque transmission, simplifying the overall device while maintaining manufacturing economy.
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
Facilitates mass production and simplifies handling by allowing the drill chuck to be manufactured and assembled economically, while maintaining quick-change characteristics and ensuring a secure connection to the drilling spindle.
Implementation Method 1
a drive insert can be pressed into the adapter body after the threaded joint is established to wedge the threads and transmit torque from the drilling spindle
Implementation Method 2
when a return spring bears axially against the release sleeve
Implementation Method 3
a control cam is implemented on the inner circumference of the release sleeve in order to bear against the detent element implemented as a detent ball
Data Source
AI summary
A drill chuck having a chuck body that has a receptacle on its axially rearward end, having clamping jaws that can be moved relative to the chuck axis, and having a clamping sleeve that serves to move the clamping jaws. An adapter body can be placed in the receptacle and coupled in a torque-transmitting manner, which adapter body has an adapter receptacle for detachable connection to the drilling spindle of a power drill and has, in the wall of the adapter receptacle, at least one detent element that can be moved by a release sleeve.