Micro Machine Actuator and Transmission for Compact Force
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Solution Overview
Problem
Current Micro Electro Mechanical Systems (MEMS) face challenges in developing micro machines that are significantly smaller and more efficient, with higher drive frequency rates and lower power requirements, while maintaining sufficient force and reduced footprint.
Innovation Solution
The development of micro machines that include a micro actuator and micro shaft, coupled with a micro transmission system, allowing for in-plane and out-of-plane motion conversion, and the use of thermal actuators or torsional ratcheting actuators to drive micro shafts, enabling the creation of compact, high-performance micro devices such as blenders and transport machines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If traditional micro engines are used, then sufficient force can be provided, but the footprint is large and power consumption is high
Solution Approach 1:
The micro machine is divided into separate functional modules: a micro actuator (thermal or torsional ratcheting) for force generation, a micro transmission system for motion conversion, and a micro shaft for output. This segmentation allows each component to be optimized independently, resulting in a compact overall footprint while maintaining sufficient force capabilities through the actuator-transmission-shaft architecture.
Solution Approach 2:
The patent employs out-of-plane vertical shafts and three-dimensional transmission mechanisms (including vertical gears and stacked components) to utilize the third dimension for force transmission. This vertical dimensionality allows force generation without increasing the planar footprint, as components are arranged in the vertical direction rather than spreading out horizontally.
2Force
If traditional micro engines are used, then sufficient force can be provided, but power consumption is high
Solution Approach 1:
The patent replaces traditional mechanical micro engines with alternative actuation mechanisms including thermal actuators (using thermal expansion) and torsional ratcheting actuators (using electrostatic or magnetic fields). These substituted mechanisms provide equivalent or superior force capabilities while consuming significantly less power, as they eliminate the continuous mechanical combustion and moving parts inherent in traditional micro engines.
Solution Approach 2:
The invention changes the operating parameters of the actuation system by using intermittent thermal cycling or electrostatic pulsing instead of continuous mechanical operation. This parameter change allows force generation on demand with minimal energy consumption, rather than requiring constant power input to maintain operation.
3Area of moving object
If micro machines are made smaller, then footprint is reduced, but drive frequency rate decreases
Solution Approach 1:
The patent applies local quality optimization by using lightweight materials and minimized component dimensions specifically in the rotating and reciprocating parts (such as the micro shaft and transmission elements) to reduce moment of inertia. This allows these local components to operate at high frequencies despite the overall compact size, while non-moving structural elements maintain sufficient strength.
Solution Approach 2:
The invention incorporates dynamic design elements including flexible couplings, damped vibrations, and adaptive transmission ratios that allow the micro machine to operate efficiently at high drive frequencies. The transmission system can dynamically adjust to maintain optimal operating conditions across varying frequencies, preventing the typical frequency reduction that occurs in miniaturized systems.
4Area of moving object
If micro machines are made smaller, then footprint is reduced, but force capabilities decrease
Solution Approach 1:
The patent employs nested component arrangements where smaller elements are positioned within or between larger structural elements. The micro transmission system uses nested gears and stacked components that generate force through multiple levels, allowing sufficient force capabilities to be achieved within a reduced footprint by utilizing vertical stacking and nested geometries rather than horizontal expansion.
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
These micro machines achieve lower power consumption, higher drive frequency rates, and increased force capabilities, with a footprint that is more than ten times less than traditional micro engines, enabling efficient operation in small-scale applications.
Implementation Method 1
the use of thermal actuators or torsional ratcheting actuators to drive micro shafts
Implementation Method 2
torsional ratcheting actuators to drive micro shafts
Data Source
AI summary
A micro machine may be in or less than the micrometer domain. The micro machine may include a micro actuator and a micro shaft coupled to the micro actuator. The micro shaft is operable to be driven by the micro actuator. A tool is coupled to the micro shaft and is operable to perform work in response to at least motion of the micro shaft.