Grease Packing Jig Presser Mechanism
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Solution Overview
Problem
Conventional grease packing jigs require heavy lids to prevent grease leakage under pressure, leading to operational burdens and safety risks for personnel due to their weight and potential for injury if dropped.
Innovation Solution
A grease packing jig design featuring a support table with pivotable holding rods and springs or wing nuts to securely press the upper lid downward, eliminating the need for heavy lids by using spring forces or nut tightening to maintain the lid's position during greasing operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heavy lids are used to prevent grease leakage under pressure, then grease sealing reliability is improved, but operator safety and ease of operation deteriorate due to weight and injury risk
Solution Approach 1:
The pressing function is segmented from the lid structure itself and transferred to separate pressers that are independently positioned on the support table. This allows the lid to be lightweight while the pressing force is provided by dedicated components (pressers with springs or weights) that act externally on the lid during operation.
Solution Approach 2:
Pressers serve as intermediary components between the grease pumping system and the lid. These pressers transmit the necessary downward force to the lid without requiring the lid itself to be heavy, thereby preventing grease leakage while maintaining operator safety.
2Reliability
If manual pressing of the upper lid is required during greasing, then grease leakage prevention is improved, but operational efficiency and ease of operation worsen due to continuous manual intervention
Solution Approach 1:
The pressers are designed to automatically maintain constant downward pressure on the lid during the entire greasing operation without requiring continuous manual intervention. The springs or weights provide self-regulating force that adapts to the greasing process, allowing the system to service itself and eliminating the need for operators to continuously press the lid.
Solution Approach 2:
The pressers are pre-positioned and pre-loaded with springs or weights before the greasing operation begins. This preliminary setup ensures that the downward pressure is already in place and automatically maintained throughout the process, eliminating the need for continuous manual adjustment or intervention during operation.
3Ease of operation
If the upper lid is made lightweight for operator safety, then ease of operation is improved, but grease leakage risk increases under pumping pressure
Solution Approach 1:
The function of preventing grease leakage is segmented from the lid's weight and transferred to separate pressers. This allows the lid to be lightweight for operator safety while the pressers provide the necessary downward force to prevent grease leakage under pumping pressure.
Solution Approach 2:
Pressers act as intermediary components that provide the necessary downward force on the lightweight lid to prevent grease leakage. These pressers mediate between the lightweight lid structure and the high-pressure grease pumping process, ensuring reliable sealing without requiring the lid itself to be heavy.
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 design reduces the weight of the lids, minimizing operator burden and preventing injuries while ensuring effective grease distribution without leakage, even when the lids are not manually pressed down.
Implementation Method 1
a holding plate 49 to be engaged with an upper surface of the upper lid 23 for pressing the upper surface of the upper lid 23 with a spring force of the spring 54
Implementation Method 2
Grease which is pumped from the grease pumping port 11 into the grease packing space 9 under a pressure finds its ways into spaces between the inner ring 1, the tapered rollers 2 and the retainer 3
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An object of the present invention is to provide a grease packing jig capable of preventing an upper lid 23, which has a grease pumping port 30, from being lifted by grease pumping pressure while grease is being packed into gaps in a bearing A. The bearing A has a plurality of rolling elements 2 arranged equidistantly on an outer circumferential surface of an inner ring 1 by means of a retainer 3. The jig includes: a support table 20 for placing the baring with an end surface of the inner ring 1 faced downward; a disc-shaped inner lid 21 to be placed on the other end surface of the inner ring 1; and an upper lid 23 which is disc-shaped, has a larger diameter than the inner lid 21, a grease pumping port 30 and a lower surface formed with an inner lid housing recess 29 for housing the inner lid 21 while leaving a grease pumping space 22 between itself and an upper surface of the inner lid 11 as well as between itself and an outer circumferential surface of the inner lid, for packing grease into a gap space in the bearing A from a grease packing port 56 provided between an inner circumferential surface of the inner lid housing recess 29 in the upper lid 23 and the outer circumferential surface of the inner lid 21. The support table 20 is provided with pressers arranged to engage with an upper surface of the upper lid 23 for pressing the upper lid 23 downward thereby preventing the upper lid 23 from being lifted.