Transmission Oil Drain Structure for Accurate Level Adjustment
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Solution Overview
Problem
During oil changes in transmissions, the circulation of new oil can cause it to flow down and directly into drain holes, leading to continuous discharge even when the oil amount falls below the specified level, making it difficult to adjust the oil amount accurately.
Innovation Solution
The design includes a case with a drain hole that opens in a direction intersecting the gravity direction on a tubular portion, and optionally, a rib on top of the tubular portion, which prevents oil flowing down from entering the drain hole, allowing for controlled discharge and easy adjustment of the oil amount.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a drain hole is formed on the case itself for adjusting oil amount, then the oil amount can be adjusted, but the oil flowing down from above may flow directly into the drain hole and continue to be discharged even when the oil amount falls below the specified amount
Solution Approach 1:
The drain hole is moved from the case wall to a tubular portion that protrudes in a direction intersecting gravity (horizontally). This spatial relocation changes the drainage geometry so that flowing oil must change direction to reach the drain hole, preventing direct flow and enabling accurate oil level determination.
2Device complexity
If the drain hole opens in the direction of gravity on the case, then oil discharge is simple, but it is difficult to determine when the oil amount reaches the specified amount due to continuous discharge from flowing oil
Solution Approach 1:
The tubular portion protrudes horizontally from the case, and the drain hole opens on the end face of this tubular portion. This creates a L-shaped drainage path that intersects with the vertical flow direction, causing flowing oil to bypass the drain hole and allowing clear visual determination of the specified oil level.
Solution Approach 2:
The tubular portion acts as an intermediary structure between the case interior and the external drainage path. It redirects the oil flow away from the drain hole opening, serving as a mediator that separates the oil circulation flow from the drainage function.
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 effectively suppresses the discharge of oil from the drain hole when the specified amount is reached, facilitating determination of the correct oil level and enabling easy adjustment, thus ensuring accurate oil amount in the transmission.
Implementation Method 1
a tubular portion that protrudes in a direction intersecting a direction of gravity, and the drain hole opens in a direction intersecting the direction of gravity on the tubular portion
Data Source
AI summary
An apparatus includes a case that stores oil inside, wherein the case includes a drain hole that discharges the oil to an outside, and a tubular portion that protrudes in a direction intersecting a direction of gravity, and the drain hole opens in a direction intersecting the direction of gravity on the tubular portion.