Vehicle Motor Greasing Indicator via Buoyant Display Member
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Solution Overview
Problem
The existing bearing devices for electric railway vehicles require complex structures for indicating the status of greasing, making it difficult to determine if supplemental greasing has been performed, which can lead to lubrication failures due to excessive or insufficient grease.
Innovation Solution
A vehicle main electric motor with a ring-shaped filling chamber and a greasing tube system that includes a discharge section with a display member of lower specific gravity than the semi-solid lubricant, allowing the display member to move and indicate greasing status visually when supplemental greasing is performed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a double-tubular lubricating oil introduction tube is used to indicate greasing status, then the ability to determine whether greasing has been performed is improved, but the device complexity increases
Solution Approach 1:
The patent extracts the indication function from the complex double-tubular structure and implements it through a simple display member in a discharge section. The display member (such as a float or indicator element) is taken out as a separate, simple component that visually indicates greasing status without requiring complex tubular structures.
Solution Approach 2:
The patent applies local quality by placing a display member with specific properties (lower specific gravity than grease) only in the discharge section where grease flows out. This localized approach provides indication functionality only where needed, without complicating the entire grease delivery system.
2Device complexity
If a display member with lower specific gravity than semi-solid lubricant is used in the discharge section, then the structure for indicating greasing status is simplified, but the ability to accurately indicate supplemental greasing status may be compromised
Solution Approach 1:
The display member automatically responds to grease pressure and flow without requiring external power or control systems. The member's buoyancy-driven movement self-indicates whether grease has reached the discharge section, providing accurate supplemental greasing status detection through passive, self-service operation.
Solution Approach 2:
The patent utilizes parameter changes in the display member's position based on grease pressure and flow conditions. When grease pressure reaches the discharge section during supplemental greasing, the display member changes its position (moves or becomes visible), providing accurate indication of greasing status through physical parameter change rather than complex sensing.
3Ease of operation
If greasing is performed based on maintenance ledger records alone, then the ease of operation is improved, but the reliability of lubrication maintenance decreases due to potential record errors
Solution Approach 1:
The patent introduces visual feedback through the display member in the discharge section. Maintenance personnel can directly observe whether grease has reached the discharge point, providing immediate confirmation of proper greasing. This feedback mechanism eliminates reliance on potentially erroneous ledger records while maintaining simple operational procedures.
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
Simplifies the structure for indicating the greasing status of the vehicle main electric motor, allowing for accurate determination of greasing without the need for a double-tubular lubricating oil introduction tube, thereby preventing lubrication failures.
Implementation Method 1
a display member is arranged that, due to pressure of the semi-solid lubricant during supplemental greasing by supplying the semi-solid lubricant, moves in the greasing direction in the discharge section
Implementation Method 2
a display member is arranged that has a specific gravity lower than a specific gravity of the semi-solid lubricant
Data Source
AI summary
A vehicle main electric motor includes: a ring-shaped filling chamber, which is formed in contact with a ball bearing and a roller bearing in a direction of a rotation shaft, for filling with a semi-solid lubricant, and which has a central axis concentric with the rotation shaft; and a discharge section connected to the filling chamber, for inflow of the semi-solid lubricant from the filling chamber. A display member, which has a specific gravity lower than a specific gravity of the semi-solid lubricant, is arranged, in an interior of the discharge section, at an initial position that is a position not reached by the semi-solid lubricant during an initial greasing. The discharge section has a retaining part for retaining, at a movement position that is a determined position within the discharge section, the display member moving in a greasing direction due to pressure of the semi-solid lubricant during a supplemental greasing. At least a portion of visible light from the exterior reaches at least a portion of the movement position.