Rotating Nut Ball Screw Lubrication via Reservoir
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional rotating nut ball screw units face issues with reduced structural rigidity due to modifications required for lubrication and inadequate lubrication of the screw bolt and nut surfaces, leading to intermittent lubricant supply and lubricant sticking in the oil supply pipe due to centrifugal forces.
Innovation Solution
A lubricating device with a main body, collar, and bearing is integrated into the nut, featuring oil holes and an oil reserving space that allows forced lubricant supply to the screw bolt and nut surfaces, using split bearings and a hollow nut with an inner spiral groove to accommodate the lubricant, while a scraper prevents foreign material intrusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If via holes are bored through the bearing shell and nut to supply lubricant, then the lubricating function is provided, but the structural rigidity is reduced
Solution Approach 1:
The patent introduces a lubricant reservoir as an intermediary component that stores lubricant and supplies it through controlled channels. This mediator system ensures continuous lubrication without requiring direct through-holes in the bearing shell and nut, thereby maintaining structural rigidity while providing reliable lubrication function.
2Reliability
If lubricant is supplied to the inner space of the nut, then lubrication is provided, but continuous supply to the outer thread and inner thread is interrupted
Solution Approach 1:
The lubricant reservoir is pre-filled with sufficient lubricant before operation begins. This preliminary action ensures that lubrication can continue without interruption during the initial operation phase, eliminating the problem of intermittent supply that occurs when the inner space must be completely filled first.
Solution Approach 2:
The lubrication system is segmented into distinct functional zones: the lubricant reservoir for storage, the bearing shell for support, and the thread engagement area for actual lubrication. This segmentation allows lubricant to be supplied continuously to the critical thread interfaces without requiring the entire nut interior to be filled, ensuring uninterrupted lubrication.
3Reliability
If a lubricant box is attached to the rotating nut, then lubrication is provided, but the lubricant sticks to the inner surface of the oil supply pipe due to centrifugal force
Solution Approach 1:
The lubricant reservoir acts as an intermediary that is strategically positioned and designed to counteract centrifugal effects. By locating the reservoir and oil supply channels appropriately, the system mediates between the rotating nut and the lubricant supply, preventing direct centrifugal adhesion of lubricant to supply pipes while ensuring continuous delivery to the lubrication 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
This solution ensures consistent and effective lubrication of the rotating nut ball screw unit, enhancing structural rigidity and preventing lubricant sticking, thereby improving operational efficiency and reliability.
Implementation Method 1
The collar necks around the main body with the bearing intercalated therebetween so as to let the main body able to rotate with respect to the collar
Data Source
AI summary
The rotating nut ball screw unit with lubricating arrangement has a lubricating device composed of a main body, a collar and a bearing. The main body is provided with several oil holes and is attached to the end surface of the nut. The main body is relatively rotatable with respect to the collar intercalating the bearing therebetween. An oil storage forces the lubricant into an oil reserving space surrounded by the main body, the collar and the bearing. The oil reserving space is in communication with the oil holes and allows the lubricant to be forced into the main body and then to reach the surface of the screw bolt via oil holes. The forced lubrication arrangement of the present invention ensures a better lubricating effect.