E-Drive Reducer Lubrication Gutter Layout Around Obstructing Shafts
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Solution Overview
Problem
Existing speed reducers face inefficiencies in lubrication, particularly with passive lubrication systems where the rise of lubricant from the bottom to the top is insufficient, often hindered by transmission shafts, leading to inadequate lubrication of components like toothed wheels.
Innovation Solution
A speed reducer design featuring a lubricant-receiving and -distributing collector with dual reservoirs on either side of the toothed wheel, connected by gutters to facilitate lubricant distribution via gravity, combined with a deflector ramp to guide lubricant past obstructing elements, enhancing lubricant recovery and distribution within the reducer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If passive lubrication devices with ramps are used to promote lubricant rise from bottom to top, then energy consumption is reduced, but lubricant rise is insufficient when transmission shafts impede the flow
Solution Approach 1:
The collector is divided into multiple reservoirs (first reservoir, second reservoir, third reservoir) arranged at different positions and heights within the housing. This segmentation allows lubricant to be collected and distributed through multiple pathways, bypassing obstructions caused by transmission shafts while maintaining passive lubrication without energy consumption.
Solution Approach 2:
The invention adds a vertical dimension to lubricant distribution by arranging reservoirs at different heights (first reservoir at highest level, second reservoir at intermediate level, third reservoir at lowest level). This multi-level arrangement creates gravitational flow paths in three-dimensional space, allowing lubricant to rise and distribute effectively despite horizontal obstructions from transmission shafts.
2Reliability
If a single reservoir is arranged above the shafts between secondary shaft and upper wall, then lubrication is provided to rotating shafts, but vertical axis congestion occurs
Solution Approach 1:
Instead of a single reservoir, the invention uses multiple segmented reservoirs distributed throughout the housing volume. The first reservoir is positioned at the highest level away from the vertical axis, the second reservoir at an intermediate level, and the third reservoir at the lowest level. This segmentation distributes the lubrication function across multiple locations, delivering lubricant to various shafts without concentrating components on a single vertical axis.
Solution Approach 2:
The multi-reservoir collector system serves multiple functions simultaneously: it collects lubricant from different regions, stores lubricant in distributed reservoirs, and distributes lubricant to multiple rotating shafts through gravitational flow. This universal system replaces the need for separate lubrication circuits for different shafts, reducing overall device complexity while improving lubrication reliability.
3Quantity of substance
If dual reservoirs are arranged on either side of the toothed wheel, then lubricant recovery and distribution is improved, but collector complexity increases
Solution Approach 1:
The collector is segmented into multiple reservoirs (first, second, and third reservoirs) with distinct functions. The first and second reservoirs are positioned on either side of the toothed wheel to maximize lubricant recovery from gear meshing, while the third reservoir provides additional storage and distribution capacity. This segmentation increases lubricant recovery quantity while maintaining a relatively simple integrated collector structure.
Solution Approach 2:
Multiple reservoirs and collection functions are merged into a single integrated collector assembly that occupies the central region of the housing. The reservoirs are interconnected through internal passages, allowing lubricant to flow freely between them under gravity. This merging approach increases lubricant recovery capacity without proportionally increasing overall device complexity, as the collector serves as a unified multi-functional component.
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 design effectively recovers and distributes a large quantity of lubricant throughout the speed reducer, ensuring adequate lubrication even with obstructing elements, while maintaining the energy efficiency of passive lubrication systems.
Implementation Method 1
The lubricant falling back into the collector by gravity
Implementation Method 2
ramps are formed within the housing to promote the rise of lubricant from the bottom of the reducer to the top
Data Source
AI summary
A speed reducer for a powertrain includes, in an orthogonal frame of reference: a reduction device including a first shaft extending along a first axis of rotation and coaxially carrying a first toothed wheel, and a housing with a hollow shape including a base and a peripheral wall integrally formed with the base, the peripheral wall partially surrounding the reduction device. Also included is a lubricant-receiving and -distributing collector arranged in the housing between the peripheral wall and the first axis of rotation. The lubricant-receiving and -distributing collector includes a first reservoir and a second reservoir which are arranged on either side of the first toothed wheel.