Curved Roller Locking Device for Tool Holder Stability
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Solution Overview
Problem
Conventional locking devices fail to firmly hold objects due to limited contact area and friction between needle rollers and the tool holder, leading to potential shaking and instability.
Innovation Solution
A locking device with a collar body, roller cage, and clamping set featuring curved clamping blocks and rollers that increase contact area and friction, allowing the rollers to get stuck between concave recesses, ensuring the object is securely held.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If needle rollers are used to lock the tool holder, then the locking device can be assembled with simple structure, but the contact area between the roller and tool holder is limited causing the tool holder to shake
Solution Approach 1:
The patent replaces conventional cylindrical needle rollers with curved surface rollers that have a spherical or cylindrical outer surface. This curvature allows the roller to contact the tool holder over a larger area, increasing friction and preventing the tool holder from shaking while maintaining the simplicity of the locking device structure.
2Reliability
If multiple needle rollers are used to increase contact points, then the locking capability is improved, but the contact area of each roller remains limited
Solution Approach 1:
By changing from cylindrical needle rollers to curved surface rollers, each roller achieves a significantly larger contact area with the tool holder. The curved surface allows for broader contact while maintaining the multi-roller configuration, thus improving locking capability without sacrificing contact area.
3Device complexity
If conventional abutting clamps are used, then the structure is simple, but the friction and contact area are insufficient to prevent shaking
Solution Approach 1:
The curved surface of the roller creates increased friction force through greater contact area with the tool holder. This curvature-based design enhances the friction force without complicating the clamping structure, effectively preventing the tool holder from shaking during operation.
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 locking device effectively increases the contact area and friction, preventing rotation and ensuring the object is firmly held, enhancing the stability and machining quality by using curved clamping blocks and rollers.
Implementation Method 1
The multiple rollers are rotatably mounted to the roller cage and are respectively received by the multiple first concave recesses and the multiple second concave recesses. Each one of the multiple rollers is rotatable along a corresponding one of the multiple first concave recesses and a corresponding one of the multiple second concave recesses.
Data Source
AI summary
A locking device has a collar body, a roller cage, multiple rollers, and a clamping set. The collar body has a chamber formed inside the collar body and multiple concave recesses formed in an inner periphery of the collar body. The roller cage is mounted in the chamber. The clamping set has multiple clamping blocks annularly disposed within the roller cage. Each one of the multiple clamping blocks is curved and has multiple second concave recesses formed in an outer peripheral surface of the clamping block. The multiple rollers are rotatably mounted to the roller cage and are respectively received by the multiple first concave recesses and the multiple second concave recesses. Each one of the multiple rollers is rotatable along a corresponding one of the multiple first concave recesses and a corresponding one of the multiple second concave recesses.