Linear Motor Wire Bracket Reduces Rotational Moment
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Solution Overview
Problem
Conventional component mounting machines using linear motors experience rotational moment interference due to resistive loads from wires, affecting the practicality and accuracy of the component mounting process.
Innovation Solution
A bracket is attached to the movable element to support wires close to the linear motor, reducing the rotational moment applied to the slide and ensuring proper movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wires are held on a bracket attached to the slide, then the rotational moment on the slide is reduced, but the device complexity increases
Solution Approach 1:
The bracket is moved from the slide (horizontal dimension) to the movable element (vertical dimension above the slide). This dimensional relocation changes the force transmission path, allowing the wires to be supported closer to their attachment point and reducing the rotational moment on the slide while maintaining structural integrity.
Solution Approach 2:
The bracket attached to the movable element serves as an intermediary structure that supports the wires at a position closer to the linear motor. This intermediary bracket reduces the lever arm of the resistive load, thereby minimizing the rotational moment transmitted to the slide while still providing adequate wire support.
2Reliability
If the bracket is positioned close to the movable element, then the rotational moment is reduced, but the ease of operation decreases
Solution Approach 1:
The wire support function is segmented from the slide structure and assigned to a separate bracket attached to the movable element. This segmentation allows the bracket to be positioned optimally for reducing rotational moment while the slide maintains its primary movement function, and the bracket can be independently accessed for maintenance.
Solution Approach 2:
The bracket is attached to the movable element rather than the stationary slide, making it a dynamic component that moves with the mounting head. This dynamic positioning maintains the reduced rotational moment configuration while allowing the bracket to be accessed during maintenance cycles when the system is stationary.
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 minimizes the rotational moment on the slide, ensuring accurate and practical movement of the mounting head, thereby improving the component mounting process.
Implementation Method 1
the head moving device includes a linear motor
Implementation Method 2
a linear motor drive device in the moving device
Data Source
Figure 1
Figure 2
Figure 3
AI summary
In the component mounting machine that performs mounting of components by moving a mounting head attached to slide 40 using linear motor 48, stator 52 of the linear motor that is forms of magnets 50 arranged side by side is arranged on base 22, movable element 56 is fixed to a slide so as to pass through the stator, and bracket 68 for holding a portion of wires for supplying power to the linear motor and wire protector 72 is fixed to the movable element. Since the bracket is located at a position close to the axis line of the movable element, the rotational moment acting on the slide due to the deformation resistance of the wires and the wire protector caused by the movement of the slide is reduced, and appropriate movement of the slide is ensured.