Hydraulic Mount Structure With Integrated Fluid Chambers for Vibration Damping
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Solution Overview
Problem
Conventional hydraulic suspension strut support mounts are complex and expensive to produce, with compromised damping performance due to the separate construction of the support spring and hydraulic module, leading to inefficiencies in vibration damping and noise isolation.
Innovation Solution
A hydraulic mount design featuring an inner core, a cage, and an elastomer body with fluid chambers, where the elastomer body is undercut-free in axial and radial directions, allowing for simplified production and integration with a compact outer sleeve, enabling effective damping of low-frequency vibrations and noise reduction through a fluid channel and radially projecting lips.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional hydraulic suspension strut support mounts are used, then damping performance is achieved, but the construction is complex and expensive to produce
Solution Approach 1:
The patent combines the support spring function and hydraulic module into a single integrated elastomer body with fluid chambers. The elastomer body serves both as the support spring and contains the hydraulic fluid chambers, eliminating the need for separate components and simplifying the overall construction while maintaining damping performance.
Solution Approach 2:
The elastomer body performs multiple functions simultaneously: it acts as the support spring, contains the hydraulic fluid chambers, and provides the damping function. This multi-functional design reduces the number of individual parts and simplifies the mount construction.
2Reliability
If the support spring lies outside the hydraulic module, then construction is simplified, but damping performance deteriorates
Solution Approach 1:
The support spring and hydraulic module are merged into a single elastomer body structure. The fluid chambers are integrated within the elastomer body itself, ensuring that the damping function operates effectively across the full amplitude range while maintaining a unified construction.
3Adaptability or versatility
If the elastomer body has undercuts in axial direction, then design flexibility increases, but production complexity increases
Solution Approach 1:
Instead of designing the elastomer body with undercuts and requiring complex demolding processes, the patent inverts the approach by designing the axial end faces to be substantially undercut-free. This allows for simpler axial demolding while still achieving the required design flexibility through other means.
4Adaptability or versatility
If the elastomer body and cage have undercuts in fluid chamber recess region, then design flexibility increases, but manufacturing precision requirements increase
Solution Approach 1:
The patent inverts the conventional approach by designing the fluid chamber recesses to be substantially undercut-free in at least two predetermined mutually opposite radial directions. This simplifies the molding process and reduces precision requirements while maintaining sufficient design flexibility for the fluid chamber configuration.
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 design allows for cost-effective, simplified production of hydraulic mounts with enhanced damping capabilities and noise reduction, achieving effective isolation of vibrations up to 200 Hz with reduced dynamic stiffness and noise generation.
Implementation Method 1
an elastomer body (16) that extends between the inner core (12) and the cage (14), and the elastomer body (16) elastically connects the inner core (12) and the cage (14) to each other
Implementation Method 2
the first fluid chamber recess and the second fluid chamber recess are each limited in a radially outwards direction by the outer sleeve (18) to form a first fluid chamber (22a) and a second fluid chamber (22b)
Data Source
AI summary
A hydraulic mount is provided and includes: an inner core, a cage that surrounds the inner core, an elastomer body that extends between the inner core and the cage and elastically connects them to each other, and an outer sleeve that encloses the cage. The elastomer body has a first circumferential fluid chamber recess and a second circumferential fluid chamber recess. The first fluid chamber recess and the second fluid chamber recess are each limited in a radially outwards direction by the outer sleeve to form a first fluid chamber and a second fluid chamber. The elastomer body is configured to be substantially undercut-free in an axial direction on its axial end faces. The elastomer body and the cage are configured to be substantially undercut-free in the region of the first fluid chamber recess and the second fluid chamber recess, at least in two predetermined, mutually opposite radial directions.