Ball Screw Deflecting Device Anchoring and Guidance
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Solution Overview
Problem
Conventional ball screw devices face issues with the secure anchoring and precise guidance of ball return pipes, leading to inefficient movement of ball bearing members through endless ball guiding passages due to unsupported and misaligned tubular tongues, and the formation of sharp angles that hinder smooth operation.
Innovation Solution
A deflecting device with an anchoring structure comprising a nut member and screw with aligned helical grooves, and deflecting devices with ring-shaped members and projections/protrusions that securely engage with the nut and screw, forming stable pathways for smooth ball bearing movement through multiple rows of endless guiding passages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ball return pipes are attached with tube support flanges, then the ball return pipes are supported above the nut, but the ball return pipes cannot be closely or precisely secured to the nut and the tubular tongues cannot be precisely directed toward the endless ball guiding passage
Solution Approach 1:
The deflecting device is divided into multiple components: a body portion with guiding passages, tubular tongues for ball engagement, and a mounting portion with fastening structures. This segmentation allows each component to be optimized independently - the body portion ensures precise ball guidance while the mounting portion provides secure attachment to the nut, resolving the contradiction between support stability and alignment precision.
Solution Approach 2:
The deflecting device acts as an intermediary component between the ball screw assembly and the ball return system. It precisely directs balls from the helical grooves through its guiding passages and tubular tongues, then transfers them to the ball return pipe. This intermediary function ensures both stable support and precise alignment, as the deflecting device can be independently positioned and secured to the nut.
2Productivity
If 90-degree returning angles or sharp returning angles are formed in the ball guiding passage, then the ball return pipe can guide balls through returns, but the ball bearing members cannot be smoothly moved through the passage
Solution Approach 1:
The deflecting device employs curved guiding passages and tubular tongues with rounded surfaces instead of sharp angles. The ball bearing members roll smoothly through these curved paths, which gradually change the direction of motion. This curvature eliminates the impact and friction associated with 90-degree returns, maintaining ball circulation capability while ensuring smooth ball movement throughout the guiding passages.
3Device complexity
If conventional ball return pipes are used, then the structure is simple, but the ball bearing members cannot be smoothly and suitably moved through the endless ball guiding passages
Solution Approach 1:
The deflecting device segments the ball guidance function into distinct components: the body portion with helical groove alignments, tubular tongues for ball engagement and direction, and mounting structures for attachment. This segmentation enhances reliability by ensuring each component performs its specific function optimally, while the overall structure remains relatively simple and can be integrated into existing ball screw systems.
Solution Approach 2:
The deflecting device is pre-configured with precisely formed guiding passages and tubular tongues that are already aligned to receive balls from specific helical grooves. This preliminary preparation ensures that balls are smoothly directed into the return pipe without requiring complex adjustment mechanisms, maintaining structural simplicity while achieving reliable ball guidance.
Data Source
AI summary
A ball screw device includes a screw engaged into a nut member for forming two or more endless ball guiding passages and for receiving a number of ball bearing members, the nut member includes two or more conduits and recesses communicative with the helical grooves of the nut member, two deflecting devices are attached to end portions of the nut member and each include an inner member attached to the nut member and having two or more pathways aligned with the recesses of the nut member, and an outer member attached to the inner member and coupled to the inner member with one or more radially extended protrusions for suitably guiding ball bearing members.