Electric Push Rod Sealing Module for Water and Dust Exclusion
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Solution Overview
Problem
Existing electric push rods lack waterproof and dustproof structures, leading to corrosion and rust due to exposure to sediment, water vapor, and dust, which affects their normal operation.
Innovation Solution
A waterproof and dustproof electric push rod design featuring a single-lip oil seal, a first anti-swing ring, a piston oil seal, and a second anti-swing ring tightly attached to the inner tube, along with threaded oil storage tanks on the anti-swing rings for lubrication, to prevent dirt and moisture ingress during retraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no waterproof or dustproof structure is provided in the electric push rod, then the structure is simple and easy to manufacture, but sediment, water vapor, and dust will enter the push rod causing corrosion and rust
Solution Approach 1:
The waterproofing function is segmented into multiple components: a single-lip oil seal for external sealing, a piston oil seal for internal sealing, and two anti-swing rings for structural support. Each component performs a specific sealing function, collectively providing comprehensive protection against water and dust while maintaining manageable complexity through functional division
Solution Approach 2:
The sealing components are nested within the push rod structure in a layered manner. The single-lip oil seal is positioned at the outermost sealing position, followed by the piston oil seal and anti-swing rings internally. This nested arrangement maximizes sealing effectiveness within the limited space of the push rod while minimizing overall structural complexity
2Ease of operation
If the inner tube is exposed to the outdoor environment, then the structure is simple allowing direct retraction, but the outer wall will be stained with sediment and dust that will enter the push rod
Solution Approach 1:
The single-lip oil seal acts as an intermediary element between the external environment and the internal push rod mechanism. It allows the inner tube to retract smoothly while intercepting and blocking sediment, water vapor, and dust particles from entering the internal components, thus protecting against contamination without impeding operational smoothness
3Reliability
If multiple sealing components are added to prevent water and dust ingress, then waterproof and dustproof performance is improved, but the device complexity increases
Solution Approach 1:
The anti-swing rings serve multiple functions simultaneously: they provide structural support to maintain the positioning of sealing components, prevent swing or misalignment of the inner tube during retraction, and assist in guiding the movement. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while maintaining high waterproof performance
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 design effectively prevents dust and water from entering the push rod, reducing corrosion and rust, while also providing lubrication for smoother operation, ensuring the push rod functions reliably in various environments.
Implementation Method 1
the single-lip oil seal plays a role in scraping off dirt (dust, silts, etc.) on the surface of the inner tube, and the internal piston oil seal can be waterproof and dustproof
Implementation Method 2
threaded oil storage tanks on the anti-swing rings for lubrication
Data Source
AI summary
The present invention relates to the field of push rods, in particular to a waterproof and dustproof electric push rod, where a waterproof and dustproof module includes a single-lip oil seal, a first anti-swing ring, a piston oil seal and a second anti-swing ring, which are arranged in sequence in a retraction direction of an inner tube. When the inner tube retracts, since inner rings of the single-lip oil seal, the first anti-swing ring, the piston oil seal and the second anti-swing ring are tightly attached to an outer sidewall of the inner tube, the single-lip oil seal plays a role in scraping off dirt (dust, silts, etc.) on the surface of the inner tube, and the internal piston oil seal can be waterproof and dustproof.