Linear Motor Wire Bracket Layout for Accurate Mounting Head Motion
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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 mounting process.
Innovation Solution
A component mounting machine design featuring a bracket attached to the movable element to hold wires close to the linear motor, reducing the rotational moment applied to the slide by minimizing the distance between the wires and the motor axis, thus ensuring accurate movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If wires are held on a bracket attached to the slide, then the structure is simple, but the resistive load generates rotational moment that interferes with slide movement
Solution Approach 1:
The patent extracts the wires from the slide structure and relocates them to be held by the movable element instead. This separation removes the source of resistive load from the slide, eliminating the rotational moment interference while maintaining structural simplicity through the bracket on the movable element.
Solution Approach 2:
The patent introduces the movable element as an intermediary to hold the wires. By placing the bracket on the movable element rather than directly on the slide, the wires are supported at a position close to the linear motor, which mediates the interaction between the wires and slide to minimize rotational moment.
2Reliability
If wires are held close to the linear motor on the movable element, then rotational moment is reduced, but the bracket adds to the moving mass
Solution Approach 1:
The patent changes the position parameter of the wire support from the slide to the movable element. This parameter change optimizes the distance between the wires and linear motor axis, minimizing rotational moment while accepting the minor mass increase from the bracket as a necessary trade-off for movement accuracy.
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 solution effectively reduces the rotational moment on the slide, ensuring appropriate displacement and improving the practicality and accuracy of the component mounting process.
Implementation Method 1
a unidirectional moving device configured to move the mounting head in a first direction using a linear motor
Implementation Method 2
a stator that configures the linear motor, the stator being held on the base with multiple magnets that are lined up in the first direction, a movable element that configures the linear motor, the movable element including a coil
Data Source
AI summary
A component mounting machine that performs mounting of components by moving a mounting head attached to slide using linear motor, stator of the linear motor that is forms of magnets arranged side by side is arranged on base, movable element is fixed to a slide so as to pass through the stator, and bracket for holding a portion of wires for supplying power to the linear motor and wire protector 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.