Vehicle Packing Seal Structure for Hydraulic Oil Leak Prevention
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Solution Overview
Problem
Existing packing devices for vehicles, such as those using O-rings made of rubber, fail to maintain constant assembly position under hydraulic pressure, leading to degraded sealing force and potential oil leaks due to deformation and abrasion.
Innovation Solution
A packing device with a body part, power providing part, and sealing part, where the sealing part is composed of different materials coupled through insert molding, with a metallic or plastic first sealing part and a rubber second sealing part, designed to prevent oil leaks by maintaining the second sealing part's position and preventing deformation between the screw and body part under hydraulic pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-material O-ring is used for sealing, then the device structure is simple, but the sealing force degrades under hydraulic pressure due to deformation and abrasion
Solution Approach 1:
The patent applies composite materials by combining a hard outer ring made of wear-resistant material (such as metal or hard plastic) with a soft inner sealing ring made of elastic material (such as rubber or polymer). This composite structure allows the outer ring to resist abrasion from the screw while the inner ring maintains sealing force through elastic deformation, thereby resolving the contradiction between structural simplicity and sealing reliability under hydraulic pressure.
2Adaptability or versatility
If a rubber O-ring is used, then the sealing part is flexible, but the O-ring deforms and gets abraded under hydraulic pressure causing oil leaks
Solution Approach 1:
The patent combines materials with different properties to create a composite sealing part where the soft inner ring provides flexibility and adaptability to maintain sealing contact, while the hard outer ring provides resistance to hydraulic pressure and abrasion. This composite structure resolves the contradiction between needing flexibility for sealing and resistance to hydraulic pressure damage.
Solution Approach 2:
The sealing part is segmented into multiple functional components: an outer ring for structural support and abrasion resistance, and an inner sealing ring for maintaining sealing force. This segmentation allows each component to specialize in its function, with the inner ring providing flexibility for sealing while the outer ring protects against hydraulic pressure damage.
3Manufacturing precision
If the O-ring is pushed by hydraulic pressure into the gap between parts, then the O-ring fills the gap, but the O-ring is abraded and causes oil leaks
Solution Approach 1:
The composite sealing part with its hard outer ring and soft inner ring prevents the sealing part from being pushed into the gap between parts under hydraulic pressure. The hard outer ring provides structural rigidity to resist the hydraulic pressure, while the soft inner ring maintains sealing contact, thereby preventing both abrasion and oil leaks while maintaining sealing position accuracy.
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 effectively prevents oil leaks by maintaining the sealing part's position and preventing damage from hydraulic pressure, ensuring stable sealing performance and extended product lifetime.
Implementation Method 1
the first and second sealing parts which are made of different materials are coupled to each other through the insert molding method
Implementation Method 2
configured to press against the insertion space part and the power providing part so as to prevent an oil leak
Data Source
AI summary
A packing device for a vehicle may include: a body part; a power providing part rotatably mounted in the body part, and disposed through the body part; an insertion space part disposed in the body part; and a sealing part disposed in the insertion space part, including an insert-molded structure having different materials, and configured to press against the insertion space part and the power providing part so as to prevent an oil leak.