Integrated Actuator Combining Rotational and Linear Motion
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Solution Overview
Problem
Conventional actuators require separate units for rotational and linear movements, leading to spatial inefficiencies and accuracy issues in compact spaces, as they need to be controlled and positioned separately for each function.
Innovation Solution
A single unit actuator with a main shaft having both a first shaft portion for omnidirectional magnetic field generation and a second shaft portion for rotational magnetic field generation, along with a coil wound around the main shaft, enabling both rotational and linear driving functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two separate actuators are used to perform both rotational and linear movements, then both functions can be achieved, but the spatial requirement increases and positioning accuracy decreases due to alignment errors
Solution Approach 1:
The patent combines two separate actuators (rotational actuator and linear actuator) into a single integrated actuator unit. The main shaft integrates both the first shaft portion for rotational movement and the second shaft portion for linear movement, eliminating the need for separate actuators and reducing spatial requirements while maintaining both functional capabilities
Solution Approach 2:
The single actuator unit is designed to perform multiple functions - both rotational driving and linear driving - through its dual shaft portions. The main shaft serves universal purposes by incorporating both rotational capability (first shaft portion with omnidirectional magnetic field) and linear capability (second shaft portion with rotational magnetic field) in one structure
2Adaptability or versatility
If two separate actuators are used for rotational and linear movements, then both functions can be achieved, but positioning accuracy deteriorates due to errors in arranging separate units
Solution Approach 1:
By merging the rotational and linear actuation functions into a single integrated actuator with a unified main shaft, the patent eliminates alignment errors that occur when arranging separate actuators. The integrated structure ensures precise positioning without the cumulative errors from multiple separate components
3Adaptability or versatility
If separate actuators are used for rotational and linear movements, then both functions can be performed, but the device complexity and control requirements increase
Solution Approach 1:
The patent merges the control systems of two separate actuators into a single control unit. The integrated actuator receives unified control signals that simultaneously manage both rotational and linear movements, reducing the complexity of having to coordinate and control two independent actuators separately
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 actuator achieves improved positional accuracy and spatial efficiency by performing both rotational and linear movements with a single unit, reducing errors and space requirements.
Implementation Method 1
a main shaft having a first shaft portion for generating a magnetic field in an omnidirection
Implementation Method 2
a second shaft portion for generating a magnetic field in a rotational direction
Implementation Method 3
a coil wound around an outer peripheral surface of the main shaft
Data Source
AI summary
An actuator is provided, which includes a main shaft having a first shaft portion for generating a magnetic field in a linear direction and a second shaft portion for generating a magnetic field in a rotational direction, and a coil wound around an outer peripheral surface of the main shaft. The actuator performs both a rotational driving function and a straight driving function via a single unit to improve the positional accuracy and provide spatial efficiency, thereby improving the merchantable quality of the actuator.