Electric Scooter Power Assembly Lubrication Duct Network
Solution Overview
Problem
Conventional electric scooters face reduced lubrication effectiveness due to long lubricant flowing distances and bubble formation in the lubricant pipes, which negatively impact the performance of the electric motor and gearbox.
Innovation Solution
A lubrication system with a case duct, driven gear shaft duct, and bearing seat ducts is integrated into the power assembly, reducing lubricant flow distance and incorporating a bubble eliminating device with ribs and protrusions to eliminate bubbles, while directing lubricant directly to meshed teeth through a jet bore.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two independent pipes are provided from the pump to the electric motor and the gearbox respectively, then the lubrication system can cover all components, but the lubricant flowing distance increases and lubrication effect decreases
Solution Approach 1:
The patent integrates the lubrication paths for the electric motor and gearbox into a single unified duct system within the power assembly case. The lubricant flows through a shared passage that distributes lubrication to both components, eliminating the need for separate independent pipes and reducing the overall flowing distance.
Solution Approach 2:
The patent redesigns the lubrication system by creating a three-dimensional integrated duct network within the power assembly case, allowing lubricant to reach multiple components through spatial optimization rather than extending linear pipe lengths to each component separately.
2Reliability
If lubricant flows through long pipes to reach all components, then complete lubrication coverage is achieved, but bubbles are generated in the lubricant
Solution Approach 1:
The patent combines the lubrication delivery system into a compact integrated duct structure that minimizes the lubricant path length, thereby reducing the opportunities for bubble formation while still ensuring all components receive adequate lubrication through optimized flow distribution.
3Productivity
If the electric motor and gearbox are operated at high speed, then power transmission efficiency is improved, but temperature increases requiring effective lubrication and cooling
Solution Approach 1:
The patent integrates the lubrication and cooling functions into a single unified duct system that simultaneously addresses both high-speed power transmission needs and temperature control requirements by delivering lubricant that serves dual purposes of lubrication and thermal management.
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
This configuration enhances lubrication efficiency, reduces temperature, and ensures consistent lubrication to the electric motor and gearbox, eliminating bubbles and improving overall performance.
Implementation Method 1
the lubrication system of the present invention has a short flowing distance of the lubricant to enhance the effects of lubrication and reducing temperature
Data Source
AI summary
A lubrication system of a power assembly of an electric scooter includes a case duct and a bearing seat duct formed in a case of the power assembly, and a driven gear shaft duct formed in a driven gear shaft of a driven gear. Lubricant flows to the case duct, the driven gear shaft duct, a driven gear bearing seat in the case, the bearing seat duct, a driving bearing seat in the case in sequence. The lubrication system has a short flowing distance of the lubricant to enhance the effects of lubrication and reducing temperature.