Vehicle Push-Lifter Drainage and Ventilation Design
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Solution Overview
Problem
Conventional push-lifter designs for vehicles allow water to enter through air holes, leading to rusting of sprig members due to inadequate drainage and ventilation configurations.
Innovation Solution
The design incorporates a drainage portion on the lower side of the push-lifter with an air vent portion positioned upwardly, and in some embodiments, a meandering flow channel or internal drainage with an upper air vent to prevent water from entering the air vent through the drainage portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a drainage portion is provided on the lower side and air vent portion on the upper side, then water drainage is improved, but water may still enter through the air hole and rust the sprig member
Solution Approach 1:
The case is divided into multiple functional portions: a drainage portion for water drainage, an air vent portion for air ventilation, and a water prevention portion for blocking water entry. This segmentation allows each portion to perform its specific function independently, preventing water from reaching the sprig member while maintaining drainage and ventilation capabilities.
Solution Approach 2:
The water prevention portion acts as an intermediary barrier between the drainage portion and the sprig member. It blocks water that enters through the air hole from reaching the sprig member, while still allowing the drainage portion to function. This intermediary structure resolves the contradiction by protecting the sprig member without compromising the drainage system.
2Productivity
If water drainage is prioritized with a lower drainage portion, then water removal is improved, but the air vent portion may be exposed to water damage
Solution Approach 1:
The case is divided into distinct functional zones: the drainage portion at the lower end for efficient water removal, the air vent portion at the upper end for ventilation, and the water prevention portion positioned between them. This segmentation allows the drainage portion to operate at maximum efficiency while the water prevention portion protects the air vent portion from water exposure.
Solution Approach 2:
The water prevention portion extends in the radial direction from the inner peripheral face of the case, creating a three-dimensional barrier structure. This dimensional approach allows water to be blocked from reaching the air vent portion while maintaining unobstructed drainage flow through the drainage portion, resolving the contradiction between drainage efficiency and air vent protection.
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
Effectively drains water and prevents its entry into the air vent, thereby reducing rusting and ensuring the push-lifter's operational integrity.
Implementation Method 1
in an attachment state of the case relative to the vehicle body side, the drainage portion drains water toward a downward direction
Implementation Method 2
the air vent portion is located upwardly relative to the drainage portion so as to suppress the water from entering into the air vent portion through the drainage portion
Data Source
AI summary
A push-lifter for a vehicle drains water entered into an inside through a drainage portion. A lower portion of a case includes a peripheral wall, a bottom wall, and an air vent portion opening at a center of the bottom wall. A cap includes a bottom portion located away from the bottom wall, and forming a first air flow channel communicating with the air vent portion between the bottom portion and the bottom wall; a side portion located away from the peripheral wall by continuing to the bottom portion, and having a cylindrical shape forming a second air flow channel communicating with the first air flow channel between the side portion and the peripheral wall; and a drainage portion located on a lower side in an attachment state of the case relative to a vehicle body side, communicating with the second air flow channel, and opening toward the bottom portion.