Gearbox Oil Isolation Plate Layout for Lower Agitation Loss
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Solution Overview
Problem
Existing gearboxes in vehicles experience significant oil agitation loss due to lubricating oil being agitated by gears, leading to reduced transmission efficiency and energy loss, particularly in electric vehicles where this affects the vehicle's range.
Innovation Solution
A gearbox design that includes an oil isolation plate and housing to create a lubricating oil holding space isolated from gears, minimizing oil agitation by using a main body plate and side extension parts to guide and contain lubricating oil, reducing contact with gears.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If multiple gears are positioned at the bottom of the gearbox to meet overall design constraints, then the gearbox can accommodate all transmission components, but the oil agitation loss increases significantly due to multiple gears agitating the lubricating oil simultaneously
Solution Approach 1:
The gearbox internal space is segmented into two distinct regions by the oil isolation plate: a lubricating oil holding space at the bottom and a gear operating space above. This segmentation allows the gears to be positioned in the upper region while the lubricating oil is contained in the lower region, preventing oil agitation loss while maintaining proper space utilization for all transmission components.
Solution Approach 2:
The lubricating oil is effectively extracted from the gear operating region and isolated into a separate holding space. The oil isolation plate creates a physical barrier that removes the lubricating oil from the area where gears rotate, eliminating the harmful interaction between rotating gears and lubricating oil while maintaining the necessary lubrication function.
2Speed
If gears rotate at high speed to meet transmission requirements, then the transmission efficiency should improve, but the oil agitation loss increases significantly, affecting the efficiency of motive power transmission
Solution Approach 1:
The oil isolation plate serves as an intermediary barrier between the high-speed rotating gears and the lubricating oil. This intermediate structure allows the gears to rotate at high speeds in the upper operating space while preventing the lubricating oil in the lower holding space from being agitated, thus maintaining high transmission efficiency without energy loss.
3Reliability
If lubricating oil is positioned at the bottom of the gearbox for proper lubrication, then the lubrication function is maintained, but the gears agitate the oil causing energy loss and reduced transmission efficiency
Solution Approach 1:
The gearbox is segmented into a lubricating oil holding space at the bottom and a gear operating space above, separated by the oil isolation plate. This segmentation maintains the lubrication function by keeping lubricating oil in the lower region while preventing gear-induced agitation, as the oil and gears occupy separate spatial zones.
Solution Approach 2:
The lubricating oil is extracted from the gear operating region and confined to a separate holding space. The oil isolation plate creates a physical boundary that removes the lubricating oil from the area where gears rotate, eliminating oil agitation loss while maintaining the necessary lubrication function through the isolated holding space.
Data Source
AI summary
A gearbox includes a housing, a first shaft, accommodated in the housing and having a first large gear, the first shaft rotating about a first rotation axis, the first rotation axis being substantially parallel to an axial direction of the gearbox. A second shaft is accommodated in the housing and has a second large gear, the second shaft rotating about a second rotation axis, the second rotation axis being substantially parallel to the axial direction of the gearbox. An oil isolation plate which, together with the housing, forms a lubricating oil holding space, the lubricating oil holding space being substantially isolated from the first large gear and the second large gear.