Electromechanical Actuator Vibration Filtering in a Compact Housing
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Solution Overview
Problem
Existing electromechanical actuators for closure, covering, or solar protection installations face challenges in vibration filtering due to complex and costly vibration filtering modules, which are difficult to manufacture and result in increased length and noise transmission, especially when the casing diameter is small.
Innovation Solution
A simplified vibration filtering module with a transmission element, end stop, and viscoelastic elements is integrated inside the casing, reducing vibration transmission and module length, while minimizing costs and industrialization complexities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a vibration filtering module is integrated inside the casing of the electromechanical actuator, then vibration transmission is reduced, but the length of the actuator increases significantly
Solution Approach 1:
The vibration filtering module is nested inside the existing casing of the electromechanical actuator. The module comprises a vibration filtering member with first and second ends, where the first end is positioned near the electric motor and the second end is positioned near the torque support, both within the casing boundaries. This nesting approach allows vibration filtering functionality to be integrated without significantly increasing the external dimensions of the actuator.
Solution Approach 2:
The vibration filtering member is designed with a radial orientation within the casing, extending from the central axis outward toward the casing wall, rather than solely in the axial direction. This dimensional reorientation allows the filtering element to occupy radial space within the existing cylindrical casing, thereby reducing the axial length requirement while maintaining effective vibration filtering capability.
2Object-affected harmful factors
If the vibration filtering member has sufficient dimensions and connection thickness to ensure effective vibration filtering, then vibration transmission is reduced, but manufacturing complexity and cost increase
Solution Approach 1:
The vibration filtering member is designed with a substantially uniform cross-sectional area along its length, simplifying the manufacturing process. The member can be produced as a monolithic component using injection molding or extrusion processes, eliminating the need for complex assembly of multiple parts with varying dimensions. This homogeneous design maintains effective vibration filtering while significantly reducing manufacturing complexity and cost.
3Object-affected harmful factors
If the vibration filtering module uses complex connection structures to ensure proper mounting, then vibration filtering effectiveness is improved, but industrialization and quality control become difficult
Solution Approach 1:
The connection functions are extracted and simplified to basic mounting operations. The vibration filtering member includes simplified connection elements at its ends that can be directly mounted to the casing using standard fastening methods. This extraction of complex connection structures allows for straightforward industrialization through conventional manufacturing and assembly processes, while maintaining effective vibration filtering through the core filtering member design.
4Object-affected harmful factors
If the vibration filtering member is made with sufficient thickness and complexity to filter vibrations effectively, then vibration transmission is reduced, but the actuator length and manufacturing cost increase
Solution Approach 1:
The vibration filtering member is designed to utilize the casing wall itself as part of the filtering structure. The member can be integrally formed with or attached to the casing, where the casing material and the filtering member material work together as a composite system. This approach reduces the need for additional thick filtering material while maintaining effective vibration filtering, thereby reducing overall material quantity and cost.
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 effectively filters vibrations in both axial and radial directions, reduces noise, and minimizes the length of the electromechanical actuator, making it more compact and cost-effective.
Implementation Method 1
a first viscoelastic element (39) arranged between the torque support (21) and a first end (36a) of the transmission element (36), according to the direction of the axis of rotation
Implementation Method 2
The first and second viscoelastic elements (39, 40) are arranged, according to the direction of the axis of rotation, between the torque support and the end stop, via the transmission element
Data Source
AI summary
An electromechanical actuator comprises a housing, a torque support (21) and a module for filtering vibrations (33). The torque support (21) comprises a shaft (35) extending along an axis of rotation (X) of the actuator. The module (33) is arranged inside the housing and comprises a transmission element (36), a stop (38) and first and second viscoelastic elements (39, 40). The transmission element (36) is mounted around the shaft (35) and is attached to the housing. The stop (38) is connected to the shaft (35). The first viscoelastic element (39) is arranged between the torque support (21) and a first end (36a) of the transmission element (36). The second viscoelastic element (40) is arranged between a second end (36b) of the transmission element (36) and the stop (38).