Driving Module Tensile Force Adjustment for Motion Assistance
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Solution Overview
Problem
Existing motion assistance apparatuses for individuals with joint problems or for military purposes lack efficient power transmission systems that maintain consistent tensile force, leading to potential damage or abnormal operation due to varying distances between driving and joint modules.
Innovation Solution
A driving module with a power conversion unit, tensile force adjustment unit, and power transmission unit that includes a rotary rod, power conversion block, and a guide member to maintain constant tensile force by adjusting the distance between the driving and joint modules, ensuring stable power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the distance between driving module and joint module varies, then the apparatus can adapt to different user configurations, but the tensile force of power transmission unit becomes unstable
Solution Approach 1:
The power transmission unit is designed with dynamic length adjustment capability through the tensile force adjustment unit. The power transmission unit can be wound or unwound on the winding member to maintain constant tensile force while the distance between driving module and joint module changes, enabling both adaptability and reliability
Solution Approach 2:
The system changes the length parameter of the power transmission unit dynamically through the tensile force adjustment unit. By adjusting the winding amount on the winding member, the system maintains optimal tensile force parameter despite variations in distance between modules
2Ease of operation
If separate motors are provided at left and right hip joint portions, then each joint can be driven independently, but the device complexity increases
Solution Approach 1:
The patent combines multiple power transmission units and their control mechanisms into a single integrated driving module. This merging approach reduces the overall number of separate motors and control units while maintaining independent control capability through the unified power distribution system
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 solution ensures consistent tensile force application to the power transmission unit, preventing abnormal operation and damage, while maintaining optimal distance between driving and joint modules, thus enhancing the reliability and safety of the motion assistance apparatus.
Implementation Method 1
A first screw thread may be formed on the rotary rod and a second screw thread corresponding to the first screw thread may be formed on the power conversion block
Implementation Method 2
A first screw thread may be formed on the rotary rod and a second screw thread corresponding to the first screw thread may be formed on the power conversion block
Implementation Method 3
a tensile force adjustment unit configured to connect the power conversion block and the power transmission unit, and adjust a tensile force of the power transmission unit
Data Source
AI summary
A driving module including a driving source configured to generate power, a rotary rod connected to the driving source to rotate by receiving the power from the driving source, a power conversion block coupled with the rotary rod to be straight-line-driven in a longitudinal direction of the rotary rod in response to a rotation of the rotary rod, and a power transmission unit configured to operate in response to a driving of the power conversion block is disclosed.