Electric Tool Quick Assembly Spline Locking Mechanism
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Solution Overview
Problem
Current electric tools face difficulties in quick assembly and secure connection between the base body and tool body due to varying spline hole positions and loose connections during operation, leading to assembly challenges and safety concerns.
Innovation Solution
An electric tool design featuring a movable spline tooth on a drive shaft with a rotation limit structure, an elastic member, and a locking mechanism that allows for quick alignment and secure locking of the tool body to the base body, ensuring stable connection and easy disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base body and tool body are coupled by a spline tooth and spline hole requiring tooth-hole alignment, then the connection is secure, but the assembly time increases and quick assembly is compromised
Solution Approach 1:
The spline tooth is pre-positioned on the drive shaft before assembly, and the elastic member is pre-loaded to store energy. When the tool body is inserted, the spline tooth automatically aligns with the spline hole through the driving force, eliminating the need for manual tooth-hole alignment and reducing assembly time while maintaining secure connection
Solution Approach 2:
The spline tooth is made movable along the drive shaft through the elastic member, transforming from a static alignment requirement to a dynamic self-aligning mechanism. The elastic member allows the spline tooth to move and adapt during insertion, enabling automatic alignment and quick assembly
2Device complexity
If the tool body is directly connected to the base body in a screw thread manner, then the structure is simple, but the connection loosens during operation due to vibrations
Solution Approach 1:
The locking mechanism uses a locking ring with a locking ball that rotates into a locking groove, creating a curved surface engagement. This spherical/curved locking interface provides anti-loosening capability during vibrations while maintaining a relatively simple overall structure, resolving the contradiction between structural simplicity and connection stability
3Device complexity
If the spline tooth is fixed on the drive shaft, then the structure is simple, but the assembly requires precise tooth-hole alignment which is difficult to achieve
Solution Approach 1:
The spline tooth is transformed from a fixed position to a movable position along the drive shaft, enabled by the elastic member. This dynamic configuration allows the spline tooth to move during insertion and automatically align with the spline hole, eliminating the need for precise pre-alignment and significantly improving assembly ease
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 facilitates quick and reliable assembly, reduces vibration during operation, and enhances operational safety by maintaining a stable connection between the base body and tool body, improving the overall machining effect.
Implementation Method 1
an elastic member is further sleeved on the drive shaft; and one end of the elastic member is connected to the drive shaft, and the other end of the elastic member is connected to the spline tooth
Data Source
AI summary
An electric tool featuring quick assembly and assembly locking includes a base body and a tool body detachably connected to the base body, where a drive shaft connected to a motor is provided in a housing of the base body; a spline tooth movable along the drive shaft is sleeved on an end of the drive shaft; a rotation limit structure is provided between the drive shaft and the spline tooth; an end of the tool body is provided with a connecting sleeve; and a spline hole matched with the spline tooth is provided in the connecting sleeve. The electric tool achieves quick assembly and locking between the base body and the tool body, facilitating quick replacement of different tool heads according to work requirements and ensuring assembly reliability and operational safety.