Baffle Plate Oil Flow Control for Transmission Lubrication
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Solution Overview
Problem
Conventional transmission systems face issues with oil return to the control room, increased oil scooping resistance, oil stirring resistance due to differential gear rotation, and inadequate lubrication oil supply to shaft supports, which conventional baffle plates fail to address effectively.
Innovation Solution
A baffle plate with a body section, first drain section, peripheral rib, notch section, slit-shaped through-hole, and second drain section is arranged between the differential gear and oil sump section, allowing controlled oil flow, reducing air biting, and enhancing lubrication oil supply to shaft supports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional communicating passage is formed between the control room and machine room, then oil can flow between rooms, but the passage dimensions are constrained by casing strength requirements, preventing adequate flow rate control and causing oil amount increase in the machine room
Solution Approach 1:
The communicating passage is segmented into two parts: a first communicating passage formed in the partition wall with limited dimensions that satisfies casing strength requirements, and a second communicating passage formed in the baffle plate with optimized dimensions that enables adequate oil flow rate control. This segmentation allows each passage to serve its specific function without compromising overall system performance.
2Ease of operation
If the differential gear rotates in the oil sump section, then oil is scooped up for lubrication, but the gear contacts and stirs the oil, increasing oil stirring resistance
Solution Approach 1:
The oil sump section is divided into a first oil sump section where oil is collected and a second oil sump section that is separated from the differential gear by the baffle plate. This segmentation prevents the differential gear from contacting and stirring the oil in the first oil sump section, reducing oil stirring resistance while still enabling adequate lubrication oil supply through the communicating passages.
Solution Approach 2:
The baffle plate acts as an intermediary structure that separates the differential gear from the oil sump section. It includes drain sections that guide oil from the machine room to the control room and communicating passages that allow controlled oil flow back to the machine room, mediating between the need for lubrication and the need to reduce oil stirring resistance.
3Productivity
If oil scooped up by the differential gear drops along the casing inner wall, then oil returns to the machine room, but insufficient oil returns to the control room causing low oil level and air biting
Solution Approach 1:
The baffle plate with its drain sections and communicating passages acts as an intermediary structure that intercepts and redirects oil flow. The drain sections guide oil from the machine room to the control room, ensuring adequate oil level in the control room, while the communicating passages allow controlled oil flow back to the machine room, preventing air biting while maintaining proper oil circulation.
Solution Approach 2:
The drain sections are positioned to intercept oil before it drops along the casing inner wall. By providing predetermined oil flow paths through the drain sections and communicating passages, the system ensures oil reaches the control room before air biting can occur, performing the oil return action in advance of the problem occurrence.
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 baffle plate effectively raises the oil level in the control room, reduces oil stirring resistance, and increases the flow rate of lubrication oil to shaft supports, preventing air biting and improving overall transmission performance.
Implementation Method 1
a baffle plate (50) arranged to separate between a differential gear (9) and an oil sump section (13)
Implementation Method 2
The first drain section (61) is formed on a surface (51b) of the body section (51) on the oil sump section (13) side for leading oil scooped up in the machine room (10) by the differential gear (9) to the control room (30)
Implementation Method 3
Between the inside surface (3b) of the casing (3) and the notch section (56), a communicating passage (20) through which oil flows from the control room (30) to the machine room (10) is formed
Implementation Method 4
The slit-shaped through-hole (57) is formed on a periphery of the opening (52) of the body section (51). The second drain section (63) is formed below the through-hole (57) on the surface (51b) of the body section (51) on the oil sump section (13) side for guiding oil scooped up by the differential gear (9) and having passed via the through-hole (57) to a shaft support (9a) of the differential gear (9)
Data Source
AI summary
A baffle plate provided with a body section arranged to separate between a differential gear and an oil sump section, a first drain section for leading oil scooped up by the differential gear in a machine room to a control room, a notch section for defining a communicating passage between the inside surface of the casing and itself for letting oil flow from the control room to the machine room, a through-hole formed on a peripheral side of an opening of the body section and a second drain section for guiding oil scooped up by the differential gear and having passed via the through-hole to a shaft support of the differential gear.