Flap Device Sleeve Centering Actuator Housing Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The reliable operation of the clutch in flap devices is not guaranteed due to insufficient and unreliable positioning of the actuator housing relative to the flow housing, leading to misalignment, tilting, and stress on the actuator or flap shaft, which reduces the service life.
Innovation Solution
A sleeve is radially fixed in a form-fitting manner to both the actuator and flow housings, ensuring the output shaft is centered, preventing distortion, and protecting the coupling from contaminants, with optional centering bolts and a non-rotatable mounting to maintain alignment and reduce thermal stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the actuator housing is connected to the flow housing via a screw connection and holding element, then the assembly is flexible and easy to manufacture, but the positioning reliability and alignment precision deteriorate due to play and distortion
Solution Approach 1:
A centering sleeve is introduced as an intermediary component between the actuator housing and flow housing. The sleeve includes a first centering element that engages with the actuator housing and a second centering element that engages with the flow housing, creating a precise alignment interface that eliminates play and distortion while maintaining assembly flexibility
Solution Approach 2:
The connection system is segmented into multiple functional components: the holding element for attachment, the centering sleeve for alignment, and the clutch coupling for torque transmission. This segmentation allows each component to perform its specific function optimally, with the centering sleeve dedicated solely to positioning reliability
2Manufacturing precision
If the actuator housing is rigidly fixed to the flow housing, then the positioning precision and alignment are improved, but the device complexity and assembly difficulty increase
Solution Approach 1:
The centering sleeve acts as a mediator that provides rigid alignment between the actuator housing and flow housing while maintaining a simple assembly process. The sleeve's geometry (cylindrical shape with matching features) allows for straightforward installation without complex fastening mechanisms
Solution Approach 2:
The centering elements are pre-formed as integral parts of the centering sleeve, so that the alignment function is prepared in advance during manufacturing. This eliminates the need for complex adjustment procedures during assembly, as the sleeve is designed to self-center the components
3Device complexity
If the coupling is exposed to the environment, then the device complexity is reduced, but the reliability deteriorates due to contamination from condensation, water, dust, and salt
Solution Approach 1:
A protective sleeve (acting as a flexible shell) surrounds the clutch coupling, creating a sealed environment that protects against condensation, water, dust, and salt contamination. The sleeve allows torque transmission while excluding harmful environmental factors
Solution Approach 2:
The protective sleeve is nested within the existing housing structure, with the clutch coupling nested within the sleeve. This nested arrangement provides contamination protection without adding significant external complexity to the overall device structure
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a flap device (10) comprising an actuator housing (30) and a flow housing (20), wherein a flow channel (22) with a flap element (24) arranged therein is formed in the flow housing (20), and an actuator (32) for actuating the flap element (24) is arranged in the actuator housing (30), wherein an output shaft (50) of the actuator (32) is rotationally fixed to a flap shaft (26) via a coupling (60), and wherein a sleeve (122) completely surrounds at least an axial section of the coupling radially. According to the invention, the sleeve (122) is positively locked radially to the actuator housing (30) and to the flow housing (20), thereby enabling sufficient positioning of the actuator housing relative to the flow housing for reliable operation of the coupling.