Linear Head Module Layout for Cooling and Vibration Resistance
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Solution Overview
Problem
Existing linear head modules face challenges in optimizing the arrangement of linear motors for enhanced strength and vibration resistance, leading to potential heat trapping and reduced cooling efficiency, while also dealing with magnetic flux leakage and manual operation inefficiencies in component assembly.
Innovation Solution
The linear head module incorporates a lattice arrangement of linear motors with differently oriented protruding portions for improved strength and vibration resistance, uses fans for efficient cooling, optimizes magnetic flux by determining component dimensions, and employs a foamed sheet for resin-free coil fixation and air holes to reduce viscous resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If linear motors are arranged in a conventional configuration, then the structure is simple, but the strength and vibration resistance are insufficient
Solution Approach 1:
The patent applies asymmetry by arranging the protruding portions of the back yokes in different directions (first protruding direction for some linear motors, second protruding direction for others) rather than uniformly in one direction. This asymmetric arrangement optimizes the structural strength and vibration resistance of the linear head module while maintaining a manageable complexity level.
2Volume of moving object
If linear motors are densely arranged, then the module size is reduced, but heat trapping occurs and cooling efficiency decreases
Solution Approach 1:
The patent applies local quality by providing different cooling arrangements for different regions of the linear head module. Fans are strategically positioned to blow air toward specific groups of linear motors, creating localized cooling zones. This allows efficient heat dissipation while maintaining a compact overall module size.
3Ease of manufacture
If protruding portions are arranged uniformly, then manufacturing is simplified, but magnetic flux leaks between adjacent linear motors
Solution Approach 1:
The patent resolves the contradiction by using asymmetric arrangement of protruding portions in different directions, which prevents magnetic flux leakage paths between adjacent linear motors while maintaining manufacturing feasibility through standardized component designs.
4Strength
If resin is used to fix coils, then coil fixation is strong, but assembly process becomes complex and time-consuming
Solution Approach 1:
The patent extracts the resin fixation step from the coil assembly process by using mechanical fixation methods through the protruding portions of the back yokes. This eliminates the need for resin application and curing time, significantly reducing assembly time while maintaining adequate coil fixation strength through the mechanical structure.
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 enhances the strength and vibration resistance of the linear head module, improves cooling efficiency, reduces the module's size and weight, minimizes magnetic flux leakage, and streamlines assembly processes while maintaining accurate positioning of electronic components.
Implementation Method 1
The stator includes a back yoke and a coil. The coil is fixed to the inner peripheral surface of the back yoke to face the plurality of magnets with a gap between the coil and the plurality of magnets.
Data Source
AI summary
A linear head module includes linear motors each of which includes a movable element and a stator. The movable element includes a shaft having a shaft axis, and magnets fixed to the shaft. The stator includes a coil and a back yoke having a back yoke axis. The movable element is inserted into the back yoke movably along the shaft axis such that the shaft axis substantially coincides with the back yoke axis. The back yoke includes a protruding portion protruding outwardly. The coil is fixed to the back yoke to face the magnets. The linear motors are arranged such that the protruding portion of a first linear motor among the linear motors protrudes along a first protruding direction different from a second protruding direction along which the protruding portion of a second linear motor among the linear motors protrudes.