Linear Motor Encoder Spring Side-by-Side Arrangement
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Solution Overview
Problem
Conventional suction nozzle lifting and lowering devices for electronic component mounting apparatuses are oversized due to the placement of position detecting sensors and return springs, leading to increased size in the up and down direction.
Innovation Solution
A linear motor design with a slider supported by a frame, featuring permanent magnets aligned in the up and down direction, a tension coil spring for upward biasing, and an encoder and coil arranged side-by-side in a horizontal direction to detect movement, reducing the overall length and width of the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the position detecting sensor is located on the upper side of the slider and the return spring is located on the lower side of the slider, then the linear motor can function properly, but the size of the linear motor increases in the up and down direction
Solution Approach 1:
The encoder and spring member are arranged side-by-side in a horizontal direction rather than vertically stacking them in the up-down direction. This dimensional reconfiguration reduces the vertical height of the linear motor while maintaining all necessary functional components.
2Length of stationary object
If the encoder and spring member are arranged side-by-side in a horizontal direction, then the linear motor is downsized in the up and down direction, but the horizontal space requirement increases
Solution Approach 1:
The frame structure serves multiple functions: it supports the slider vertically, provides mounting positions for the encoder and spring member in horizontal arrangement, and maintains the overall structural integrity. This multi-functional design accommodates the side-by-side arrangement without requiring additional space.
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 design results in a downsized suction nozzle lifting and lowering linear motor that maintains performance while reducing the apparatus's height and width, enhancing its compactness and efficiency.
Implementation Method 1
a linear motor includes a position detecting sensor provided on an upper side of the slider, and a return spring provided on a lower side of the slider. The position detecting sensor is designed to detect a position of the slider in the up and down direction. The return spring is designed to prevent the slider from moving downward by its own gravity, and installed to bias the slider upwardly.
Implementation Method 2
an encoder supported by the frame in side-by-side relation with the coil in the up and down direction and adapted to detect a movement of the slider
Implementation Method 3
a spring member installed between the frame and a region of the slider spaced from the fixation position of the permanent magnets in the up and down direction, to bias the slider upwardly
Data Source
AI summary
The linear motor includes: a frame; a slider having an mounting portion to allow the suction nozzle to be coupled thereto, wherein the slider is support by the frame in a movable manner in an up and down direction; a plurality of permanent magnets fixed to the slider while being aligned in the up and down direction; a spring member installed between the frame and a region of the slider spaced from the fixation position of the permanent magnets in the up and down direction, to bias the slider upwardly; a coil supported by the frame in such a manner as to be opposed to the permanent magnets; and an encoder supported by the frame in side-by-side relation with the coil in the up and down direction and adapted to detect a movement of the slider. The encoder and the spring member are arranged side-by-side in a horizontal direction.