Rectangular Hydraulic Mount With Adjustable Overflow Channel Damping
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Solution Overview
Problem
Existing hydraulic mounts with cylindrical shapes are not optimal for modern vehicles due to limited installation space, and they require longer duct systems to effectively dampen increasing oscillating masses, which can conflict with acoustic requirements.
Innovation Solution
A hydraulic bearing with a rectangular basic shape featuring a throttle device having a throttle plate with an '8'-shaped overflow channel, where two cover disks can be rotated to adjust the effective length of the overflow channel, allowing for optimal adaptation to load conditions and improved space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a cylindrical hydraulic mount is used, then the structure is simple and easy to manufacture, but the installation space utilization is poor in modern vehicles with limited space
Solution Approach 1:
The patent changes the traditional cylindrical (rotationally symmetrical) shape of the hydraulic mount to a rectangular shape. This asymmetric design allows better utilization of the available installation space in modern vehicles, particularly in the transverse direction where space is limited. The rectangular basic shape enables more compact arrangement and better integration into the vehicle structure.
2Adaptability or versatility
If the overflow channel length is increased to dampen higher oscillating masses, then the vibration damping capability is improved, but the device length increases which conflicts with acoustic requirements and installation space
Solution Approach 1:
The patent utilizes the transverse dimension (width) by implementing a double-deck duct configuration where the overflow channel runs around the throttle disk at an angle greater than 360°. This allows the damping channel to achieve the required effective length for damping higher oscillating masses without increasing the axial length of the mount, thereby maintaining compact dimensions and satisfying both vibration damping and acoustic requirements.
3Adaptability or versatility
If a double-deck duct with multi-spiral overflow channel is used, then the vibration damping for higher oscillating masses is improved, but the structural complexity and manufacturing difficulty increase
Solution Approach 1:
The patent divides the overflow channel into two separate decks (upper and lower), each with its own damping channel that runs around the throttle disk. This segmentation allows the complex double-deck configuration to be manufactured using two separate cup-shaped sheet metal parts that can be easily formed and assembled, reducing the overall manufacturing complexity compared to a single integrated multi-spiral channel.
Solution Approach 2:
The patent employs cup-shaped sheet metal parts with radially inwardly directed openings that nest around the central throttle disk. The intermediate flat plate with axial through-opening seals and connects these nested cup structures, creating a compact assembly where the damping channels are efficiently arranged around the throttle disk without requiring complex internal geometries.
4Adaptability or versatility
If the overflow channel is made longer to increase damping effect, then the vibration damping capability is improved, but the acoustic quality for driver and occupants deteriorates
Solution Approach 1:
The patent resolves this contradiction by utilizing the transverse dimension through the double-deck configuration with channels running around the throttle disk at angles greater than 360°. This achieves the required effective channel length for damping higher oscillating masses without increasing the axial length, thereby maintaining compact dimensions that satisfy both vibration damping performance and acoustic quality requirements.
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 adjustable hydraulic bearing effectively dampens vibrations and optimizes space usage, enhancing vibration damping capabilities while accommodating varying load conditions and acoustic demands.
Implementation Method 1
a working chamber is also formed between the metal elements and the rubber element and is filled with a fluid such as hydraulic fluid, which can reach a compensation chamber of the hydraulic mount via a throttle channel. Additional damping can be achieved by means of the hydraulic fluid via the design of the throttle channel.
Implementation Method 2
a rubber-metal bearing represents an arrangement of at least one elastically deformable rubber element between usually two metal elements, which are each fixedly mounted on one of the components or the device between which the vibrations are to be damped, which is then achieved by the elasticity of the rubber element.
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to a hydraulic mount with a throttling device (4) and a working chamber (2) and a compensation chamber (3), wherein the working chamber (2) is separated from the compensation chamber (3) by the throttling device (4), the throttling device (4) having at least one overflow channel (8) by means of which the fluid can flow back and forth between the two chambers (2, 3). The invention was based on the objective of creating a hydraulic mount (1) with an approximately rectangular base shape. This objective is achieved by the fact that the hydraulic mount (1) has a substantially rectangular base shape.wherein the throttling device (4) comprises a throttle plate (7) with a bypass channel (8) and two circumferentially rotatable cover plates (12) each with a bore (15) and the bypass channel (8) is formed in the shape of an "8" and a first half (8) of the "8" is arranged on the top side of the throttle plate (7) and a second half of the "8" on the bottom side of the throttle plate (7), wherein each half (8) of the bypass channel (8) is closed at one end (8') and is hydraulically connected at the opposite end (13) through the throttle plate (7) to the other half (8) of the bypass channel (8), wherein each half of the bypass channel (8) is covered by a cover plate (12) to form a closed cavity, wherein the respective bore (15) of the respective cover plate (12) is hydraulically connected to the half (8) of the bypass channel associated with the respective cover plate (12).