Ball Screw Nut Dust Scraper and Deflector Fixation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional ball screw units have complex structures that complicate fabrication, assembly, and increase production costs due to gaps between components, leading to vibration of the ball deflecting element and inadequate dust cleaning capabilities.
Innovation Solution
A ball screw unit with a nut proper featuring a rolling spiral slot and an annular inlaid slot with a C-shaped annular packing covered by a resilient soft covering layer, which includes a continuous spiral scrapping tip and arcuate edge for stable fixation and dust cleaning, eliminating the need for additional dust cleaning mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional ball screw units use separate scrapers and ball deflecting element fixing mechanisms, then dust cleaning and element fixation functions are provided, but the structure becomes complicated with lots of component parts
Solution Approach 1:
The patent combines the dust cleaning scraper and the ball deflecting element fixing mechanism into a single integrated component. The scraper is installed within the annular inlaid slot of the nut proper, and through its spiral scrapping tip and arcuate edge configuration, it simultaneously performs dust removal from the rolling spiral slot and provides mechanical fixation for the ball deflecting element, thereby eliminating the need for separate component parts while maintaining both functions.
Solution Approach 2:
The scraper component is designed to perform multiple functions: (1) cleaning dust from the rolling spiral slot through its spiral scrapping tip, (2) fixing the ball deflecting element at position through its arcuate edge that contacts the element, and (3) preventing vibration of the ball deflecting element during operation. This multi-functional design simplifies the overall structure while ensuring reliable operation.
2Ease of manufacture
If conventional ball screw units use C shaped annular packing without resilient soft covering layer, then assembly is simpler, but gaps remain between components causing vibration
Solution Approach 1:
The patent applies a resilient soft covering layer on the scraper component. This flexible covering layer allows the scraper to adapt to slight dimensional variations and assembly tolerances, ensuring tight contact with both the nut proper and the ball deflecting element without requiring extremely precise fabrication. The resilience of the soft covering compensates for minor gaps, preventing vibration while maintaining assembly simplicity.
Solution Approach 2:
The invention changes the physical parameters of the scraper by adding the resilient soft covering layer, which modifies its mechanical properties (softness, elasticity). This parameter change enables the scraper to maintain stable contact under varying operational conditions, ensuring reliable fixation of the ball deflecting element without compromising assembly ease.
3Device complexity
If conventional ball screw units lack integrated dust cleaning mechanisms, then the structure remains simple, but dust clearing capability is inadequate
Solution Approach 1:
The dust cleaning function is merged into the existing scraper component that is already part of the ball screw unit structure. The spiral scrapping tip of the scraper is specifically designed to contact and remove dust from the rolling spiral slot, integrating dust cleaning capability into the structural component without adding separate dust clearing mechanisms, thus maintaining structural simplicity while addressing dust accumulation.
4Reliability
If conventional ball screw units require chamfered surfaces for fixing ball deflecting element, then fixation may be achieved, but fabrication becomes difficult and production cost increases
Solution Approach 1:
The resilient soft covering layer on the scraper replaces the need for precisely chamfered surfaces. The flexibility and compliance of the soft covering allow it to conform to the contact surfaces without requiring high-precision machining, thereby reducing fabrication difficulty and production cost while maintaining reliable fixation of the ball deflecting element.
Solution Approach 2:
The invention changes the contact interface parameters by using a soft, resilient material instead of rigid chamfered surfaces. This parameter change allows for greater tolerance in dimensional accuracy, simplifying the manufacturing process while ensuring stable fixation through the compliance and adaptability of the soft covering layer.
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 solution provides a simplified, cost-effective assembly with stable fixation of the ball deflecting element and effective dust cleaning, reducing component complexity and production costs while ensuring precise mechanical operation.
Implementation Method 1
A fixed scraper formed of a C shaped annular packing is covered with a resilient soft covering layer
Implementation Method 2
the inner fringe of the soft covering layer is formed in to a continuous spiral scrapping tip facing against the rolling spiral slot of the ball screw
Data Source
AI summary
A ball screw unit with dust cleaning and ball deflecting element fixing mechanism includes an annular inlaid slot along the inner surface of a nut proper proximate to the outside of a ball deflecting element. A fixed dust scrape formed of a C shaped annular packing is installed in the annular inlaid slot. The C shaped annular packing is covered with a soft covering layer at its inner fringe and the outer fringe of the soft covering layer is just stuffed in the annular inlaid slot of the nut proper. Inner fringe of the soft covering layer is formed into a spiral scraper blade corresponding to the rolling spiral slot of the screw blot. The fixed dust scraper is tightly fixing the ball deflecting element to the nut proper by means of the resiliency of the soft covering layer to clean the dust along the rolling spiral slot with its spiral scraper blade thereby serving as a dust cleaner.