Self-Locking Drill Chuck Spring Structure Against Inertia Release
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Solution Overview
Problem
Existing self-locking drill chucks face challenges in preventing self-locking state exit due to inertia, leading to complex and costly installation processes.
Innovation Solution
A self-locking drill chuck design featuring a rotatable sleeve, drill body, nut, and spring piece with teeth and cam structures, where the spring piece and nut rotate synchronously, with a lock end and connecting protrusion, and a cam structure for controlling the lock end, simplifying assembly and enhancing self-locking performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If connection structures are added to prevent self-locking state exit due to inertia, then reliability is improved, but device complexity increases and ease of manufacture deteriorates
Solution Approach 1:
The spring piece integrates multiple functions: it acts as both the self-locking element (through its lock end engaging with teeth) and the connection element (through its connecting protrusion engaging with the rotatable sleeve). This merging of functions eliminates the need for separate connection structures, reducing device complexity while maintaining reliability.
Solution Approach 2:
The spring piece serves multiple purposes simultaneously: providing self-locking force, connecting the nut to the rotatable sleeve, and enabling state transitions through its elastic deformation. This multi-functionality reduces the overall number of components needed in the system.
2Reliability
If connection structures are added to prevent self-locking state exit due to inertia, then reliability is improved, but ease of manufacture deteriorates
Solution Approach 1:
By combining the self-locking function and connection function into a single spring piece component, the number of assembly steps is reduced. The spring piece is assembled in one piece between the nut and rotatable sleeve, eliminating the need to assemble separate connection structures.
Solution Approach 2:
The spring piece uses its own elastic deformation to achieve both self-locking and connection functions. The elasticity of the spring piece allows it to automatically engage with the teeth and the rotatable sleeve without requiring additional fastening operations or complex assembly procedures.
3Ease of operation
If the spring piece and nut rotate synchronously, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The spring piece connects the nut and rotatable sleeve through its connecting protrusion, creating a mechanical linkage that ensures synchronous rotation. This merging of components eliminates the need for separate synchronization mechanisms while maintaining operational flexibility.
Solution Approach 2:
The spring piece's elastic properties allow it to dynamically adapt to rotational movements, enabling smooth synchronous rotation between the nut and rotatable sleeve. The elasticity accommodates minor misalignments and ensures continuous engagement during rotation.
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 design prevents self-locking state exit due to inertia, simplifies assembly, and improves self-locking performance by allowing flexible operation and effective clamping, reducing unnecessary structures and interference.
Implementation Method 1
the spring piece is limited between the keys of the nut by its elasticity so that it is assembled on the nut; the second end of the spring piece passes into the gap between the keys and the drill body through a pair of keys among the keys, and is attached to the key by its elasticity
Data Source
AI summary
The present invention provides a self-locking drill chuck, which the front end of its nut is provided with a number of keys, and the spring piece of the self-locking mechanism is assembled on the nut by being elastically limited between the keys of the nut. The second end of the spring piece passes into the gap between the keys and the drill body through a pair of keys among the keys, and is elastically attached to the key by its elasticity. The connecting protrusion of the spring piece is arranged on the portion of the spring piece between the pair of keys, and the lock end is located in the gap between the key corresponding to the lock end and the drill body. The present invention can not only prevent the self-locking state from exiting due to the inertia effect, but also has the advantages of convenient assembly and can further improve the self-locking performance.