Vibration Actuator Structure for Stable Contact Force
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Solution Overview
Problem
Existing vibration type actuators face issues with variations in pressurizing and reaction forces due to shape accuracy and deformation of the contact body, leading to decreased thrust, torque, and potential damage, especially when multiple vibrating bodies are used.
Innovation Solution
The actuator design includes independently displaceable vibrating body units with rotational freedom, using connecting portions to maintain consistent pressurizing and reaction forces by allowing the units to adjust to the contact body's deformation, thereby stabilizing the frictional force and preventing wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a vibration-type actuator uses a simple structure without inclination adjustment mechanism, then device complexity is reduced, but manufacturing precision deteriorates due to variation in force generated between contact body and vibration body
Solution Approach 1:
The patent makes the inclination angle adjustable rather than fixed. The inclination adjustment mechanism allows the inclination angle to be changed dynamically to optimize performance for different vibration directions and applications, resolving the contradiction between simple structure and positioning precision by introducing controlled adjustability.
Solution Approach 2:
The patent changes the parameter of inclination angle from fixed to variable. By allowing the inclination angle to be adjusted, the system can optimize the force generation between the contact body and vibration body for different manufacturing precision requirements, thereby resolving the contradiction between structural simplicity and positioning precision.
2Power
If a vibration-type actuator is designed for high output force, then power is improved, but device complexity increases due to additional components for force control
Solution Approach 1:
The patent uses the inclination angle adjustment to optimize force generation efficiency. By adjusting the inclination angle, the system can achieve higher output force for the same input power, effectively using mechanical advantage to improve power without proportionally increasing device complexity.
Solution Approach 2:
The adjustable inclination mechanism allows the system to dynamically optimize force generation. This dynamic adjustment capability enables the actuator to achieve high output force when needed while maintaining a relatively simple base structure, resolving the contradiction between power and device complexity.
3Device complexity
If a vibration-type actuator uses fixed inclination angle, then device complexity is reduced, but adaptability deteriorates for different vibration directions
Solution Approach 1:
The patent transforms the fixed inclination angle into an adjustable parameter. This dynamic capability allows the actuator to adapt to different vibration directions and application requirements while maintaining structural simplicity through a relatively compact adjustment mechanism.
Solution Approach 2:
The inclination adjustment mechanism enables the single actuator to perform multiple functions for different vibration directions. By adjusting the inclination angle, the same basic structure can serve multiple applications, achieving versatility without proportionally increasing device complexity.
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
This design reduces variations in pressurizing and reaction forces, ensuring consistent thrust and torque generation while minimizing wear and damage, even with deformations in the contact body.
Implementation Method 1
a vibration generator (130) that generates vibrations in the vibration body (103)
Implementation Method 2
a vibration generator (130) that generates vibrations in the vibration body (103)
Data Source
Figure 1A~1D
Figure 2A~2B
Figure 3
AI summary
To reduce a change in a pressurizing force and a reaction force generated between a contact body and a vibrating body along with relative movement between the contact body and the vibrating body. A vibration type actuator 101 includes a vibrating body unit 5 including a vibrating body 1 and a holding portion 8 configured to hold the vibrating body, a contact body 4, a pressurizing unit 7, a pressurizing unit 7 that brings the vibrating body 1 into contact with the contact body 4, and a connecting portion 14, wherein when predetermined vibration is excited in the vibrating body 1, the contact body 4 and the vibrating body unit 5 move relative to each other in a first direction. The connecting portion 14 connects the holding portion 8 of the vibrating body unit 5 to a support member 15 or a holding portion 8 of another vibrating body unit 5 in a relative movement direction so that the vibrating body unit 5 can displace at least in a pressurizing direction by the pressurizing unit 7 when the contact body 4 and the vibrating body unit 5 move relative to each other.