Gear Casing Rib Structure for Stable Lubricant Supply
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Solution Overview
Problem
Existing power transmission devices face instability in lubricant supply to gears and bearing portions due to varying rotational speeds, leading to inconsistent lubrication.
Innovation Solution
A power transmission device with a casing design featuring a first rib and optionally a second rib that guide lubricant along a circumferential direction, and a flow out guide to stabilize lubricant supply regardless of rotational speed, ensuring consistent lubrication to gears and bearings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the first gear rotates at variable speeds to displace lubricant upward, then the lubricant can reach different areas of the casing, but the scattering path of the lubricant changes causing unstable supply to the first gear and bearing portion
Solution Approach 1:
A lubricant passage is introduced as an intermediary structure to guide and control lubricant flow. The passage includes a guide rib that directs lubricant from the lower portion along a predetermined path to the first gear and bearing portion, ensuring stable supply regardless of gear rotational speed variations
Solution Approach 2:
The lubricant passage is positioned specifically at the lower portion of the casing where lubricant accumulates, and the guide rib is configured with specific geometry to control flow direction. This localized structural design ensures that lubricant is reliably directed to critical areas (first gear and bearing portion) independent of overall system speed variations
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
Stable lubricant supply is maintained across varying rotational speeds, enhancing gear and bearing performance by reliably guiding lubricant to critical components.
Implementation Method 1
a first gear that upwardly displaces the lubricant accumulating at a lower portion in the casing by rotation of the first gear
Data Source
AI summary
A power transmission device may include a casing; and a plurality of gears located in the casing and being lubricated by a lubricant in the casing, wherein the plurality of gears may include a first gear that upwardly displaces the lubricant accumulating at a lower portion in the casing by rotation of the first gear; the casing may include a facing wall facing a side surface of the first gear; the facing wall may include a first rib that protrudes toward the side surface of the first gear and extends along a circumferential direction of the first gear; and the side surface of the first gear, the first rib, and the facing wall may define a first lubricant passage that guides the lubricant displaced upward by the first gear along the circumferential direction.