Transmission Gear Oil Transfer Guide Plate Flow Control
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Solution Overview
Problem
Existing oil supply mechanisms for rotating shafts in gear transmissions suffer from low oil transfer efficiency due to oil leakage and insufficient oil flow rates, particularly in natural-supply systems where oil is lifted against gravity, leading to significant losses and inefficiencies.
Innovation Solution
A transmission apparatus with a guide plate and oil passages designed to enhance oil flow, including an arc-shaped recess portion, narrow upper end, and ribbed structures to prevent lateral flow, ensuring efficient oil transfer and attachment without exclusive mounts, optimized for forward vehicle travel where oil is frequently used.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a natural-supply system is used to lift oil upward from the case to the rotating shaft, then the system complexity is reduced, but the oil transfer efficiency becomes low due to lateral outflow and significant losses
Solution Approach 1:
The patent introduces an oil transfer passage as an intermediary structure between the case and the rotating shaft. This passage guides the oil flow along a controlled path, preventing lateral outflow that occurs in conventional systems. The transfer passage acts as a mediator that maintains oil flow integrity from the case bottom to the shaft oil supply port, thereby improving transfer efficiency without adding complex pumping mechanisms.
Solution Approach 2:
The patent extends the oil transfer path into the axial dimension by creating a passage that runs along the axial direction from the case bottom toward the rotating shaft. This dimensional extension allows the oil to be transported upward through a controlled three-dimensional path rather than relying on simple lateral flow, effectively utilizing space to maintain flow efficiency while keeping the system simple.
2Speed
If oil is transferred upward from the case to the rotating shaft, then gravity resistance is overcome, but oil losses increase due to lateral outflow along the transfer path
Solution Approach 1:
The oil transfer passage serves as an intermediary conduit that confines the oil flow within its boundaries during upward transport. This prevents the oil from leaking laterally along the transfer path, thereby reducing substance loss while maintaining the necessary flow rate to overcome gravity and reach the rotating shaft.
Solution Approach 2:
The patent employs the concept of a confined flow path similar to a flexible conduit, where the oil transfer passage acts as a defined channel that guides and contains the oil flow. This confinement ensures that oil is transported efficiently upward without lateral dispersion or loss, maintaining both flow rate and minimizing substance loss.
3Device complexity
If a simple oil transfer path is used from the case to the rotating shaft, then the device complexity is minimized, but the oil flow rate becomes insufficient due to outflow losses
Solution Approach 1:
The oil transfer passage is introduced as a simple intermediary structure that efficiently delivers oil from the case to the rotating shaft. This single added component prevents outflow losses without creating a complex system, thereby maintaining adequate oil flow rate while keeping device complexity minimal.
Solution Approach 2:
The patent segments the oil supply system into distinct functional zones: the case bottom oil reservoir, the axial oil transfer passage, and the shaft oil supply port. This segmentation allows each component to perform its function efficiently, ensuring adequate oil flow rate is delivered to the rotating shaft through a simple, well-defined transfer path.
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 solution significantly increases oil flow rates and transfer efficiency by minimizing leakage and optimizing oil pressure, ensuring consistent lubrication even during frequent forward vehicle travel.
Implementation Method 1
a natural-supply system utilizing water-head differential pressure (head differential pressure) in the oil
Data Source
AI summary
A transmission apparatus includes a case, a gear transmission housed in the case, an intra-shaft oil passage formed in a rotating shaft, an oil supplying passage for supplying oil to the intra-shaft oil passage, a guide plate facing an axial end surface of a gear with a predetermined distance in the axial direction of the gear, which is clipped in oil in the case; and an oil passage formed between the one end surface and the guide plate. The oil passage extends along an outer periphery of the one end surface.