Brake Hydraulic Unit Mount Structure for Resonance Isolation
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Solution Overview
Problem
Conventional brake hydraulic units experience resonance phenomena due to vibrations at frequencies close to their natural frequency, and have poor assemblability and detachability issues, requiring improvements in antivibration design and attachment methods.
Innovation Solution
A brake hydraulic pressure controller with a support structure that includes a fixture member and mount rubber, where the mount rubber is held in a compressed state between the hydraulic unit housing and the bracket, preventing resonance by regulating vibration frequencies and improving attachability/detachability through a modified assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single type of antivibration member is used to support the brake hydraulic unit, then the structure is simple, but resonance phenomenon occurs when vibration frequency matches natural frequency
Solution Approach 1:
The antivibration member is divided into multiple segments along the thickness direction, with each segment having different material properties or structural characteristics. This segmentation allows the single antivibration member to provide multiple vibration isolation characteristics, preventing resonance while maintaining structural simplicity.
Solution Approach 2:
The antivibration member uses composite material construction with different layers or regions having different material properties (e.g., different rubber compounds, densities, or viscoelastic characteristics). This composite structure enables the antivibration member to effectively dampen vibrations across a broader frequency range, preventing resonance without requiring multiple separate components.
2Strength
If plate through-holes and fixture members are used to assemble the hydraulic unit to the bracket, then the connection is secure, but the assemblability is poor
Solution Approach 1:
The fixture member is inserted through the plate through-holes and nested within the antivibration member, which itself is nested between the hydraulic unit and the bracket. This nested arrangement secures all components together in a single assembly operation, improving assemblability while maintaining secure connection.
Solution Approach 2:
The antivibration member is pre-positioned between the hydraulic unit and the bracket before the fixture member is installed. This preliminary action ensures proper alignment and positioning, making the subsequent assembly of the fixture member straightforward and securing the connection in one operation.
3Stability of the object's composition
If the hydraulic unit is firmly fixed to the vehicle body, then the stability is high, but the detachability for inspection is poor
Solution Approach 1:
The connection system allows for dynamic adjustment between firmly fixed and easily detached states. The fixture member can be securely installed to provide stable operation during normal use, but can be quickly removed for inspection or maintenance, enabling the system to adapt between stability and detachability as needed.
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
Prevents resonance phenomena and enhances the attachability and detachability of the hydraulic unit from the bracket, ensuring stable operation and reduced risk of detachment.
Implementation Method 1
a vibration damper interposed between the hydraulic unit and the bracket
Implementation Method 2
preventing occurrence of a resonance phenomenon of the hydraulic unit by regulating a vibration frequency applied from a vehicle side
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
It is possible to prevent occurrence of a resonance phenomenon of a hydraulic unit and to improve attachability/detachability of the hydraulic unit to/from a bracket. A support section (42, 43) includes: a fixture member (80) that is fixed to a housing (30) for a hydraulic unit (10) ; and a vibration absorbing member (75) that is interposed between the housing (30) and a bracket (41) and has a through-hole (75a) through which the fixture member (80) passes. The vibration absorbing member (75) includes two vibration absorbing members (75B, 75C, 75D) having different rebound resilience from each other. In a state where the vibration absorbing member (75) is partially accommodated in a recessed section (47) of the bracket (41), the vibration absorbing member (75) is held between the housing (30) and the bracket (41).