Tool Exchange Device Arc Motion Mechanism
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Solution Overview
Problem
Conventional tool exchange devices for machine tools require high-force piston cylinders due to a short moment arm, leading to increased costs and volume, and suffer from wavering and inconsistent swaying speeds during tool sleeve movement.
Innovation Solution
A tool exchange device with a driving member that rotates to twist a movement member along an arc route, increasing the moment arm and using a pressure cylinder with a lower force output, while the twisting portion moves along an arc to stabilize the tool sleeve's swaying motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the piston cylinder directly drives the tool sleeve to sway with a short moment arm, then the tool sleeve can be moved, but the piston cylinder requires a larger force output specification leading to higher cost and larger volume
Solution Approach 1:
The patent transforms the linear motion of the piston rod into rotational motion of the driving member, and then into arc-shaped motion of the twisting portion. This dimensional transformation allows the twisting portion to apply force at a longer moment arm distance from the pivot axis, reducing the required force output of the piston cylinder while achieving the same tool sleeve swaying effect.
Solution Approach 2:
The driving member and twisting portion act as intermediary mechanical elements between the piston cylinder and the tool sleeve. The driving member converts linear piston motion to rotation, and the twisting portion converts rotational motion to controlled arc-shaped swaying motion, enabling force multiplication through increased moment arm length without requiring a larger piston cylinder.
2Speed
If the piston cylinder drives the control portion to move along a straight line orientation for swaying the tool sleeve, then the tool sleeve is allowed to sway quickly, but the tool sleeve will waver during the swaying process and the swaying speed is kept from being consistent
Solution Approach 1:
The twisting portion moves along an arc-shaped route rather than a straight line, providing smooth curved motion guidance to the tool sleeve. This arc-shaped path eliminates wavering by ensuring continuous contact and stable force application throughout the swaying motion, while maintaining consistent speed through the geometric constraints of the arc trajectory.
Solution Approach 2:
The mechanism transitions from static straight-line guidance to dynamic arc-shaped guidance. The twisting portion's arc-shaped movement path adapts to the changing angular position of the driving member, providing continuous dynamic stabilization of the tool sleeve during swaying, ensuring both speed consistency and motion stability.
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
This configuration reduces the cost and volume of the pressure cylinder and ensures stable, smooth swaying of the tool sleeve by increasing the moment arm and stabilizing the force application, preventing wavering and inconsistency in swaying speed.
Implementation Method 1
the length of the moment arm between the end of the piston rod and the movement member is increased, so as to form a force-saving mechanism
Implementation Method 2
the twisting portion of the driving member twists the receiving portion of the movement member along an arc route, such that the tool retrieving member rotates to sway between the vertical position and the horizontal position
Data Source
AI summary
A tool exchange device for tool magazine includes a base having a driving member, a pressure cylinder, a movement member pivotally connected to the base adjacent to the driving member, and a tool retrieving member disposed on the movement member. The driving member has a connection portion and a twisting portion. The pressure cylinder has a piston rod pivotally connected to the connection portion for driving the driving member. The twisting portion is removably received in a receiving portion of the movement member. With the rotation of the driving member, the twisting portion forces the movement member to move along an arc shape route, such that the movement member rotates by an angle, and the tool retrieving member sways between a vertical and horizontal positions. Therefore, the tool exchange device is driven with a lower force, and the tool retrieving tool stably sways.