Liquid-Filled Vibration Mount With Metal Detent Locking
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Solution Overview
Problem
Existing vibration damping devices face issues with damage, reduced strength, and potential liquid leakage due to the use of synthetic resin in the second attachment member, leading to difficulties in attachment and potential gaps between connecting parts and grooves, especially in engine mounts with high input loads.
Innovation Solution
A liquid-filled vibration damping device with metal-made connecting parts and grooves, utilizing metal-to-metal contact and detent engagers to prevent dislodgment, ensuring reliable load-bearing and sealing performance by eliminating the need for climbing over lock projections during attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the second attachment member is made of synthetic resin to form an engaging projection for snap fitting, then the device can be attached to the bracket, but damage during deformation occurs and time-dependent deterioration such as creep deformation happens
Solution Approach 1:
The patent changes the material parameter of the second attachment member from synthetic resin to metal, fundamentally altering the mechanical properties to eliminate creep deformation and damage issues while maintaining attachment capability through metal-to-metal engaging projections
Solution Approach 2:
The patent employs a composite structure where the second attachment member consists of a metal base material with integrally formed urging rubber components, combining the strength and dimensional stability of metal with the elastic deformation capability of rubber for reliable engagement
2Ease of operation
If the second attachment member is made of synthetic resin, then the engaging projection can be formed, but load-bearing capability and strength characteristics are insufficient
Solution Approach 1:
The patent changes the material parameter from synthetic resin to metal, dramatically increasing the strength and load-bearing capability of the second attachment member and its engaging projection while maintaining the engagement mechanism functionality
3Reliability
If the connecting part climbs over the lock projection during attachment, then the dislodgment prevention mechanism is activated, but the operation becomes difficult especially when inserted to the far side
Solution Approach 1:
The patent inverts the engagement mechanism by having the engaging projection on the connecting part actively engage with the engaging receiver on the bracket through elastic deformation of the urging rubber, rather than requiring the connecting part to climb over a lock projection, thereby simplifying the attachment operation while maintaining dislodgment prevention
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 solution enhances load-bearing capability, prevents damage and time-dependent deterioration, facilitates easy attachment, and ensures reliable sealing to prevent liquid leakage, improving the overall performance and durability of the vibration damping device.
Implementation Method 1
the urging rubber actively undergoes elastic deformation, so that the deformation of the connecting part main body can be reduced or avoided
Implementation Method 2
the pair of the connecting parts and the pair of the connecting grooves are all made of metal
Data Source
AI summary
A liquid-filled vibration damping device including a main unit and a bracket, the main unit including first and second attachments connected by a rubber body, and a closure member locked to the second attachment from below with a seal member sandwiched therebetween to seal a liquid chamber. The second attachment includes a pair of metallic connectors inserted into a pair of metallic grooves of the bracket. The metal is exposed on lower faces of the connectors which are pressed against groove-inside lower faces of the grooves in metal-to-metal contact. Convex parts protruding downward are provided at far-side ends of the connectors while concave parts are provided on the grooves at locations corresponding to the convex parts. Detent engagers preventing dislodgment of the connectors inserted in the grooves are constituted in metal-to-metal contact by the convex parts entering the concave parts to be engaged.