Automotive Boot Aerating Means for Overpressure Relief
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Solution Overview
Problem
Boots used for sealing machine parts, particularly in the automotive industry, often experience overpressure issues during mounting, leading to reduced sealing effectiveness and potential early failure, especially when preassembled with a larger diameter fastening region, which can cause grease escape and incorrect positioning.
Innovation Solution
A boot design with a first fastening region of smaller diameter and a second fastening region of larger diameter, featuring a binder seat region and aerating means on the inner circumference to prevent overpressure by allowing air and grease escape during assembly, while ensuring a tight seal after attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the boot is preassembled with the second fastening region (larger diameter) on the second machine part, then the boot can be securely attached to the joint casing, but pushing the first machine part through the first fastening region generates overpressure inside the boot
Solution Approach 1:
The first fastening region is segmented into multiple sections along the axial direction, with at least one section being movable relative to the other sections. This segmentation allows the boot to deform and expand during assembly, creating space that prevents overpressure generation when the first machine part is pushed through, while still maintaining secure attachment capability.
Solution Approach 2:
The boot transitions from a static structure to a dynamic one where at least one section of the first fastening region can move axially. This dynamic behavior enables the boot to adapt during the assembly process, expanding to accommodate the first machine part without generating excessive pressure, while the movable section can subsequently be constrained to provide firm attachment.
2Stability of the object's composition
If the boot generates overpressure inside, then the boot structure remains intact, but the sealing effect is reduced and grease can escape
Solution Approach 1:
By dividing the first fastening region into movable and fixed sections, the boot creates controlled deformation zones that manage internal pressure during assembly. This prevents uncontrolled pressure buildup that would compromise the sealing effect and grease containment, while maintaining overall structural integrity.
Solution Approach 2:
The movable section allows the boot to change its physical parameters (volume, shape) during assembly. This parameter change enables the boot to accommodate the first machine part without generating harmful overpressure, thereby preserving the sealing effect and preventing grease escape.
3Ease of operation
If the first machine part is pushed through the first fastening region to attach to the second machine part, then the joint assembly is completed, but incorrect positioning or insufficient attachment firmness occurs
Solution Approach 1:
The segmented first fastening region with movable sections provides a controlled deformation mechanism that guides the first machine part through the boot. This ensures correct positioning during assembly, and the subsequent constraint of the movable section provides firm, precise attachment.
Solution Approach 2:
The movable section is designed to deform in advance during the pushing operation, creating space and guiding the first machine part to the correct position before final attachment. This preliminary deformation action ensures accurate positioning and firm attachment without requiring complex alignment procedures.
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 boot design effectively prevents overpressure and maintains a good sealing effect by allowing pressure relief during assembly, preventing grease escape and ensuring a secure attachment, even when preassembled with a larger diameter fastening region.
Implementation Method 1
allowing pressure relief during assembly
Data Source
AI summary
A boot is provided in which the formation of an internal pressure inside the boot during assembly is prevented. The boot has a first fastening region and a first diameter and having a second fastening region with a second diameter, wherein the first diameter is smaller than the second diameter, and wherein the first fastening region comprises a binder seat region on its outer circumference, wherein at an inner circumference of the first fastening region at least one first and at least one second aerating means are arranged axially spaced from each other at the inner circumference which is formed with a flat surface, and protrude beyond said surface of the inner circumference.