Grease Application Device for Inner Spline Lubrication
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Solution Overview
Problem
Conventional grease application devices face issues such as grease retention in serration portions leading to increased friction, leakage, difficulty in controlling grease application, and inability to apply a predetermined amount of grease accurately, resulting in inefficient lubrication and increased costs.
Innovation Solution
A grease application device with a nozzle body that inserts into an inner spline portion, featuring a grease retention portion, pressure-feed mechanism, and operation portion to precisely apply a given amount of grease to the groove of the spline, using a linked movement to ensure accurate and controlled grease distribution without leakage or splattering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If grease is applied to the whole region of the serration portion, then lubrication coverage is improved, but grease retention in the end portion increases leading to increased friction and prohibited smooth rotation
Solution Approach 1:
The patent applies grease selectively to specific regions of the serration portion rather than uniformly across the entire surface. The grease application device targets the groove portions between tooth portions, providing localized lubrication where it is most needed while avoiding excessive grease accumulation at the end portion that would cause friction.
2Reliability
If grease is pressure-fed into the gap, then lubrication is improved, but grease leakage to the shaft end surface occurs
Solution Approach 1:
The patent extracts or removes the harmful effect of grease leakage by designing the application device to control grease delivery precisely. The device includes features that prevent grease from escaping to the shaft end surface, such as controlled discharge mechanisms and positioning systems that ensure grease is deposited only in the intended gap regions.
3Quantity of substance
If ultrasonic vibration is applied to reduce flow resistance, then grease flow is improved, but grease application control becomes difficult
Solution Approach 1:
The patent employs dynamic control mechanisms that allow adjustment of grease flow characteristics. The application device can adapt its operation to control grease delivery precisely, potentially using controlled vibration or pressure modulation to maintain flow while preserving applicability control through dynamic adjustment capabilities.
4Reliability
If multiple grease discharge holes are used, then lubrication coverage is improved, but grease application precision decreases
Solution Approach 1:
The patent segments the grease discharge system into multiple targeted openings positioned at specific locations corresponding to the groove portions. Each discharge opening is strategically placed to deliver grease to a specific gap region, achieving both comprehensive coverage and precise application through segmented, location-specific discharge points.
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 device enables easy and secure application of a predetermined amount of grease to the inner spline portion, reducing friction, preventing leakage, and ensuring effective lubrication while maintaining operational efficiency and cost-effectiveness.
Implementation Method 1
a grease pressure-feed portion that pressure-feeds the grease retained in the grease retention portion to the nozzle
Implementation Method 2
an operation portion that links an operation of causing the nozzle body shift portion to move the nozzle body from the first end portion toward the second end portion with an operation of causing the grease pressure-feed portion to discharge the grease from the nozzle
Data Source
AI summary
This grease application device includes: a nozzle body that has a first end portion insertable into an inner spline portion, the inner spline portion being formed at an end portion of a workpiece; a nozzle that is formed on the first end portion of the nozzle body and discharges grease into a groove of the inner spline portion; a nozzle body shift portion that is connected to a second end portion of the nozzle body and that moves the nozzle body in a longitudinal direction, the second end portion being on an opposite side to the first end portion; a grease retention portion that retains the grease discharged from the nozzle; a grease pressure-feed portion that pressure-feeds the grease retained in the grease retention portion to the nozzle; and an operation portion that links an operation of causing the nozzle body shift portion to move the nozzle body from the first end portion toward the second end portion with an operation of causing the grease pressure-feed portion to discharge the grease from the nozzle.