Actuator Vibration Filtering Module With Viscoelastic Shaft Mount
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Solution Overview
Problem
Existing electromechanical actuators for closing, concealment, or solar protection installations face challenges with vibration filtering modules, including complex manufacturing, high costs, quality risks, and increased space requirements due to the complexity of the vibration filtering member and its connections, especially in small casing diameters.
Innovation Solution
The electromechanical actuator incorporates a vibration filtering module with a transmission element mounted around the torque support shaft, featuring viscoelastic elements and a stop to reduce vibration transmission, simplify the structure, and minimize length, while maintaining effective vibration filtration in both axial and radial directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a vibration filtering module is added to reduce vibrations and noise, then vibration filtration is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The vibration filtering module is divided into distinct functional components: a vibration filtering member with first and second ends, first connecting members at the first end, and second connecting members at the second end. This segmentation allows each component to be optimized independently for its specific function while simplifying the overall assembly and manufacturing process.
Solution Approach 2:
The vibration filtering member serves multiple functions: it provides vibration filtration between the electric motor and reducer, serves as a structural connection element, and enables modular assembly. The connecting members simultaneously provide mechanical attachment and positioning functions. This multi-functionality reduces the total number of separate components needed in the system.
2Object-affected harmful factors
If the vibration filtering member has complex connections and intermediate portions, then vibration filtration performance is improved, but manufacturing precision and quality control become more difficult
Solution Approach 1:
The vibration filtering member is segmented into distinct regions with specific functions: connection portions for attaching to motor and reducer, and an intermediate portion for vibration filtration. This segmentation allows each portion to be optimized for its specific manufacturing requirements, with connection portions designed for easy attachment and the intermediate portion designed for effective vibration damping.
Solution Approach 2:
Different portions of the vibration filtering member have different structural characteristics optimized for their specific functions. The connection portions have features optimized for mechanical attachment, while the intermediate portion has characteristics optimized for vibration filtration. This local optimization allows each region to be manufactured with appropriate precision requirements.
3Object-affected harmful factors
If the vibration filtering module is made larger with more complex connections, then vibration filtration effectiveness is improved, but the length and footprint of the actuator increase
Solution Approach 1:
The vibration filtering member is positioned within the housing of the electromechanical actuator, with the electric motor and reducer arranged in series along the longitudinal axis. The vibration filtering module is nested within the available space between these components, utilizing the existing structural envelope rather than adding external bulk. This nested arrangement allows effective vibration filtration without significantly increasing the overall actuator length.
Solution Approach 2:
The vibration filtering member is designed with flexibility to adapt to the spatial constraints within the actuator housing. The connecting members allow for angular and positional adjustments, enabling the vibration filtering module to fit into the available space while maintaining effective vibration isolation between the motor and reducer.
4Object-affected harmful factors
If a vibration filtering module is added to reduce noise and vibrations, then vibration filtration is improved, but manufacturing cost increases
Solution Approach 1:
The vibration filtering member is designed to serve multiple functions: vibration isolation, structural connection between motor and reducer, and positioning reference for assembly. This multi-functionality eliminates the need for separate vibration damping components, connection hardware, and alignment fixtures, thereby reducing the total component count and manufacturing cost while maintaining effective vibration filtration.
Solution Approach 2:
The vibration filtering member is designed as a standalone replaceable module that can be easily attached and detached from the motor and reducer. This modular design allows for simplified manufacturing and assembly, where the vibration filtering member can be produced separately and then integrated into the actuator system, reducing overall manufacturing complexity 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
This design simplifies the vibration filtering module's structure, reduces vibration transmission, minimizes costs, and compactifies the actuator, facilitating industrialization and reducing the overall length of the electromechanical actuator.
Implementation Method 1
a first viscoelastic element (39) arranged between the torque support (21) and a first end (36a) of the transmission element (36), in the direction of the axis of rotation (X), and a second viscoelastic element (40) arranged between a second end (36b) of the transmission element (36) and the stop (38), in the direction of the axis of rotation (X)
Data Source
Figure 1~2
Figure 3
Figure 4~5
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).