Multi-piece Cage for Brake Supply Device Spring Preloading
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Solution Overview
Problem
The existing supply device for vehicle brakes and pressure fluid accumulators faces challenges in reliable assembly due to the buckling of resetting springs under increasing preload, requiring costly adaptation measures to prevent buckling and improve process reliability.
Innovation Solution
A multi-piece cage design with fastening means that allows for the simultaneous preloading and locking of the resetting spring during assembly of the cage parts, eliminating the need for separate fastening steps and reducing the complexity of the assembly process by using a catch-type connection and diametrically opposite fastening means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the resetting spring is preloaded separately before assembly, then the spring force is established, but the assembly process becomes more complex and time-consuming
Solution Approach 1:
The patent combines the spring preloading operation with the cage assembly operation into a single integrated process. The multi-piece cage structure allows the spring to be preloaded between cage parts during assembly, eliminating the need for separate preloading steps and reducing overall assembly complexity while maintaining process reliability
Solution Approach 2:
The cage parts are designed with integrated fastening means that enable the spring to be preloaded in advance during the assembly process itself. The cage parts include built-in mechanisms that automatically preload the spring as they are joined together, performing the preloading action preliminarily without requiring additional subsequent steps
2Strength
If separate fastening steps (welding or beading) are used to join cage parts, then secure connection is achieved, but production cost increases
Solution Approach 1:
The cage parts incorporate self-service fastening means that enable the parts to join themselves through simple relative displacement without requiring external welding or beading operations. The fastening means include integrated locking mechanisms that automatically secure the connection when the cage parts are assembled, eliminating costly separate fastening steps while maintaining secure connection strength
Solution Approach 2:
The patent extracts the complex welding or beading fastening operations from the assembly process and replaces them with simpler integrated fastening means built into the cage parts. This extraction of unnecessary complex steps reduces manufacturing cost while the retained fastening means maintain adequate connection strength for the application
3Ease of manufacture
If the cage is assembled as a single piece, then manufacturing is simpler, but the resetting spring cannot be preloaded and accommodated properly
Solution Approach 1:
The cage is divided into multiple separate cage parts that can be manufactured independently and then assembled together. This segmentation allows the spring to be preloaded between the cage parts during assembly, maintaining spring preloading capability while the individual cage parts remain simple enough for easy manufacturing. The segmented design enables both manufacturing simplicity and spring accommodation
4Stability of the object's composition
If multiple fastening means are provided in pairs diametrically opposite, then spring forces are securely accommodated, but the number of components increases
Solution Approach 1:
Multiple fastening means are integrated into the cage parts themselves rather than being separate components. The fastening means are combined with the cage part structure, forming an integrated design where the fastening features are built into the cage parts. This merging reduces the number of separate components while maintaining the stability needed to accommodate spring forces through diametrically opposite pairing
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 assembly process by preloading the resetting spring within the cage parts, reducing the risk of buckling and minimizing the influence of component tolerances, while allowing for efficient accommodation of spring forces and facilitating automatic assembly processes.
Implementation Method 1
a resetting spring (5) is arranged between the carrier (6) and the piston (2)
Implementation Method 2
a carrier (6) bears a non-return valve (7) arranged coaxially to the piston (2) for the purpose of ventilating a working chamber (11)
Data Source
AI summary
The invention relates to a supply device for the supply of pressure fluid into at least one vehicle brake or into a pressure fluid accumulator, wherein a piston is movably arranged in an accommodating member, a carrier bears a non-return valve arranged coaxially to the piston for the purpose of ventilating a working chamber into which the piston plunges , and wherein a resetting spring is arranged between the carrier and the piston.It is the essence of the invention that a multi-piece cage allows inserting the resetting Spring into the cage parts, the cage parts comprise fastening means that lock the cage due to relative displacement of the cage parts, and the resetting spring is caged and simultaneously elastically preloaded under the relative displacement of the cage parts.