Hydraulically Damping Engine Mount Thread Pitch Fixing
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Solution Overview
Problem
Conventional axial mounts with hydraulic damping face issues due to the need for vulcanization of the support spring on the housing, leading to increased manufacturing costs, reduced molding capacity, and potential instability under constant loads.
Innovation Solution
The axial mount employs a thread pitch on the outside contour of the support spring that engages with the housing's inside contour, eliminating the need for vulcanization and using additional separate components, allowing for a modular construction and enhanced mechanical stability through elastomer reinforcement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the support spring is secured on the housing through vulcanization, then the support spring is firmly fixed, but the molding capacity is reduced and manufacturing costs increase
Solution Approach 1:
The support spring is divided into functionally distinct zones: a vulcanization-free lower section with thread pitch for mechanical engagement, and an upper section that can be vulcanized if needed. This segmentation allows the mount to achieve firm fixing through the threaded engagement while preserving molding capacity in the non-vulcanized lower section.
Solution Approach 2:
A thread pitch structure acts as an intermediary mechanical engagement feature between the support spring and housing. This threaded interface provides firm fixing through screw-thread engagement, eliminating the need for vulcanization in the critical load-bearing region while maintaining ease of manufacture and molding capacity.
2Strength
If a separate component is used to secure the support spring, then the support spring can be fixed, but the manufacturing process becomes more complex and costs increase
Solution Approach 1:
The support spring is designed with an integrated thread pitch structure directly formed as part of its body, merging the securing function into the spring itself. This eliminates the need for separate securing components and simplifies the manufacturing process while maintaining firm fixing strength through the integrated threaded engagement.
Solution Approach 2:
The support spring provides its own securing mechanism through the integrated thread pitch, making it self-sufficient for fixation. The spring's own structure serves the dual purpose of providing support and enabling secure engagement with the housing, eliminating dependency on additional separate components.
3Strength
If a separate component is used to secure the support spring, then the support spring can be fixed, but the joint may not withstand constant load during extended use
Solution Approach 1:
The thread pitch provides a curved, progressive engagement path that distributes constant axial loads along the threaded interface. This curved engagement geometry allows the joint to better withstand constant engine weight loads during extended use compared to flat or point-contact securing methods, improving reliability under sustained loading conditions.
4Strength
If vulcanization is performed on the housing and support spring, then strong bonding is achieved, but additional processing time and cost are required
Solution Approach 1:
The vulcanization process is extracted from the critical load-bearing region and applied only where absolutely necessary, if at all. The thread pitch provides mechanical engagement that eliminates the need for time-consuming vulcanization in the lower section, reducing overall processing time while maintaining sufficient bonding strength in the upper section where vulcanization may still be applied.
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 solution reduces manufacturing costs, conserves weight, and provides flexible axial mounts with improved noise reduction and load-carrying capacity by eliminating the need for vulcanization and separate securing components, while allowing for modular assembly and enhanced damping characteristics.
Implementation Method 1
The invention relates to an axial mount, such as a unit mount or engine mount, with hydraulic damping
Implementation Method 2
an elastomeric support spring and a housing which receives the mount core part and the support spring, wherein the mount core part is supported on the support spring
Data Source
AI summary
A hydraulically damping axial mount includes a housing with an elastomeric support spring with an insertion part, a mount core part extending in axial direction (a) in the housing and supported by a support spring, and two chambers arranged underneath one another in axial direction (a) for fluidic damping. A working chamber and an equalization chamber are spatially separated by a channel unit and are hydraulically coupled with one another by a channel. One or several insertion parts which are partially covered by the elastomer of the support spring and reinforce the support spring are inserted in the elastomeric support spring. The support spring is secured in the housing by a thread pitch, formed on the outside contour of the elastomeric support spring in the circumferential direction (u) of the elastomeric support spring and brought into engagement with a corresponding inside contour of the housing during installation of the mount.