Relay Valve Guide Sleeve With Positive Locking and Low Turbulence
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Solution Overview
Problem
Existing guide sleeves for relay valves in electropneumatic modulators for vehicle brake systems face challenges in securely guiding and fastening the collar, particularly in unipartite housings, with complex assembly processes and potential for air turbulence.
Innovation Solution
A guide sleeve with a dual function, featuring a guide section for collar guidance and a holding section for positive locking in the housing, incorporating detent hooks and radial ribs to prevent sliding and reduce air turbulence, allowing for easy assembly and secure fastening in a unipartite housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a guide sleeve is designed to guide the collar and fasten securely in the housing, then the reliability of the relay valve is improved, but the device complexity increases due to multiple sections and fastening mechanisms
Solution Approach 1:
The guide sleeve merges the guide section and holding section into a single integrated component. The guide section features a guide bore for collar guidance, while the holding section incorporates fastening elements such as clamping lips or detent hooks that engage with the housing. This integration eliminates the need for separate fastening components, reducing overall device complexity while maintaining secure fastening and reliable collar guidance throughout operation.
Solution Approach 2:
The guide sleeve is designed as a multi-functional component that simultaneously performs guidance and fastening functions. The guide bore provides precise collar alignment, while the holding section with its fastening elements secures the guide sleeve to the housing. This multi-functionality reduces the total number of components needed in the relay valve assembly, simplifying the overall device structure while ensuring reliable operation.
2Device complexity
If a dual-function guide sleeve is used for both guidance and fastening, then the number of components is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The guide sleeve employs local quality by providing different functional characteristics in different sections. The guide section features a precisely machined guide bore with specific dimensional tolerances for accurate collar alignment, while the holding section incorporates fastening elements with geometric features designed for engagement with the housing. This localized differentiation allows each section to be optimized for its specific function, making the overall manufacturing process more manageable despite the integrated design.
3Stability of the object's composition
If the holding section is designed for positive locking, then the stability of the guide sleeve is improved, but the ease of assembly decreases due to complex fastening mechanisms
Solution Approach 1:
The guide sleeve applies the inversion principle by designing the holding section with fastening elements that engage with corresponding features in the housing during assembly. The clamping lips or detent hooks are positioned to automatically engage with the housing structure as the guide sleeve is installed, providing positive locking without requiring additional fastening operations. This design ensures stable positioning while maintaining relatively simple assembly procedures.
Data Source
AI summary
A guide sleeve for guiding a collar of a relay valve for an electropneumatic modulator for a brake system for a vehicle, includes: a guide section configured to be couple-able to a counterpart guide section of the collar of the relay valve so as to allow guidance of the collar along the guide section; and a holding section configured to fasten the guide sleeve in a positively locking manner in a housing of the relay valve. Also described are a related guide sleeve device, and a relay valve, and a related method.