Self-Actuating Tool Clamp for Rapid Robot Tool Changes
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Solution Overview
Problem
Existing tool fixing and replacing methods in the machining industry are often manual, leading to increased cycle times and inefficiencies in machining processes.
Innovation Solution
A quick-change tool switching apparatus that uses a main body with clamping jaws and a flap spring to automatically load and unload tools without the need for external power sources, allowing for rapid and efficient tool changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual tool fixing and replacing methods are used, then操作简单 (operation simplicity) is maintained, but 生产效率 (productivity) deteriorates due to increased cycle time
Solution Approach 1:
The tool switching apparatus uses self-service mechanism where the tool itself activates the clamping jaws through its weight and geometric shape. When the tool is inserted, gravity causes it to rotate and push the clamping jaws outward, automatically securing itself without external actuators or power sources. This eliminates complex control systems while maintaining high productivity.
Solution Approach 2:
The patent replaces complex mechanical actuation systems (motors, cylinders, sensors) with a pure mechanical self-securing mechanism. The clamping jaws use lever arms and pivot points to convert the tool's insertion motion into automatic clamping action, achieving rapid tool changing without electronic or powered mechanical systems.
2Productivity
If automatic tool loading and unloading is implemented, then 生产效率 (productivity) is improved, but 设备复杂度 (device complexity) increases due to need for external power sources
Solution Approach 1:
The apparatus is designed to be self-actuating using only the tool's own weight and geometry. The clamping jaws automatically open when the tool is inserted (due to gravitational force causing rotation) and close when the tool is removed, eliminating the need for motors, pneumatic systems, or any external power sources while achieving rapid automatic tool changing.
Solution Approach 2:
The mechanism uses gravitational potential energy as the driving force. By positioning the clamping jaws and pivot points appropriately, the system converts the vertical insertion motion of the tool into horizontal clamping motion, utilizing gravity rather than requiring additional power sources.
3Reliability
If clamping jaws are designed to rotate around pivot, then 工具夹持可靠性 (tool clamping reliability) is improved, but 结构复杂度 (structural complexity) increases
Solution Approach 1:
The clamping system is divided into multiple independent clamping jaws, each rotating on its own pivot point. This segmentation allows each jaw to independently adapt to the tool's position and apply clamping force, improving reliability while keeping each individual jaw's structure simple and modular.
Solution Approach 2:
The clamping jaws are designed as dynamic elements that can rotate freely around pivot points rather than fixed rigid structures. This dynamic design allows the jaws to automatically adjust their position and orientation to match the tool's geometry, ensuring reliable clamping without complex adjustment mechanisms.
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
Enables automatic and convenient tool loading and unloading by robots, reducing cycle times and improving machining efficiency without the need for external power sources.
Implementation Method 1
a flap spring fixedly coupled to the main body at one end and coupled to the second protrusion at the other end, the clamping jaw is configured to rotate around the pivot in a first rotational direction under an actuation exerted by the tool to allow the first protrusion to move away from the centerline of the opening, so as to receive the tool and bias the flap spring
Data Source
AI summary
A tool switching apparatus includes a main body with an opening, the opening being configured to receive a tool and defining a centerline. A plurality of clamping jaws is provided around the opening, each clamping jaw being configured to rotate around a respective pivot fixedly coupled to the main body. The clamping jaw includes a first protrusion, a second protrusion, and a flat spring fixedly coupled to the main body. The clamping jaw is configured to rotate around the pivot in a first rotational direction under an actuation exerted by the tool to allow the first protrusion to move away from the centerline of the opening.