Through-Shaft Encoder Motor Layout for Compact Motion Feedback
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Solution Overview
Problem
The integration of encoders into miniature applications is challenging due to their size and structural requirements, limiting their use in compact systems requiring precise motion feedback.
Innovation Solution
A motor apparatus design with a through-hole configuration allows the motor shaft to extend through the encoder, enabling dual-sided functionality for driving loads or connecting to other components, enhancing space efficiency and versatility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If encoders are integrated into miniature applications, then motion feedback precision is improved, but device size and structural complexity increase
Solution Approach 1:
The encoder is nested within the motor housing structure, with the code wheel mounted on the motor shaft and the encoder body integrated into the existing motor components. This nesting approach allows the encoder to share space with the motor structure, reducing the overall volume increase while maintaining measurement precision.
Solution Approach 2:
The encoder design utilizes the axial dimension of the motor by extending the code wheel axially and positioning the encoder body along the axial direction. This dimensional approach allows the encoder to fit within the motor's axial space without significantly increasing the radial footprint, thus maintaining compactness while enabling precise motion feedback.
2Measurement precision
If encoders are integrated into miniature applications, then motion feedback precision is improved, but device complexity increases
Solution Approach 1:
The encoder components are merged with the motor structure, where the code wheel is mounted on the motor shaft and the encoder body is integrated into the motor housing. This merging eliminates the need for separate encoder mounting structures and reduces the number of discrete components, thereby reducing structural complexity while maintaining measurement precision.
Solution Approach 2:
The motor shaft serves dual functions: driving the motor load and rotating the code wheel for encoder measurement. The motor housing also serves as the encoder body, providing both motor support and encoder structural support. This multi-functionality reduces the number of dedicated components needed, simplifying the overall structure while enabling precise motion feedback.
3Adaptability or versatility
If the shaft extends through the encoder for dual-sided functionality, then versatility is improved, but manufacturing complexity increases
Solution Approach 1:
The motor shaft is segmented into two portions: a first portion extending from the first side of the housing and a second portion extending from the second side of the housing. This segmentation allows each side to be independently utilized for different functions while maintaining a unified shaft structure, enabling dual-sided functionality without requiring complex assembly processes.
Solution Approach 2:
Instead of having the encoder mounted on one side of the motor with the shaft extending outward, the design inverts the conventional approach by having the shaft extend through the encoder body from both sides. This inverted configuration allows loads or components to be connected to either side of the motor, providing dual-sided functionality while using a straightforward through-hole manufacturing approach for the encoder body.
Data Source
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AI summary
The subject technology is directed to a motor apparatus or rotary system. In an embodiment, the apparatus includes a housing comprising a first opening positioned on a first side. A motor comprising a shaft is positioned inside the housing. The shaft comprises a first portion extending through the first opening. The apparatus further includes a code wheel and an encoder. The encoder comprises a second opening. The first portion of the shaft extends through the second opening. By extending the shaft through the encoder, the apparatus allows for dual-sided functionality, enabling both ends of the shaft to be used for driving loads or connecting to other components. This configuration enhances space efficiency and the versatility of the motor apparatus, making it ideal for various compact applications.