Self-locking positioning ball spline and system and method

By integrating a self-locking actuator and a position sensing module into the ball spline design, the locking problem of existing ball splines when vertically installed or subjected to non-directional external forces is solved, achieving high-precision and reliable mechanical locking, improving the positioning accuracy and stability of the system, and making it suitable for innovative designs of high-end equipment.

CN121676574APending Publication Date: 2026-03-17DONGGUAN HIGH-TECH TRANSMISSION TECH CO LTD
5 Cites 0 Cited by

Patent Information

Application Number
CN202511901463.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-16
Publication Date
2026-03-17

AI Technical Summary

Technical Problem

Existing ball splines lack active locking capability when vertically installed or subjected to unpredictable external forces, resulting in slight movement or unexpected displacement between the sleeve and the rod, affecting the positioning accuracy and stability of the system. This can lead to a decrease in product yield or process failure, especially in applications such as high-precision assembly and optical focusing.

Method used

The ball spline design integrates a self-locking actuator, a position sensing module, and a control module. The self-locking of the sleeve and the slide rod is achieved through a piezoelectric ceramic brake or a pin-type locking mechanism. The position sensing module detects in real time and drives the self-locking actuator through the control module to perform high-frequency, high-precision mechanical locking.

Benefits of technology

It achieves rapid and reliable mechanical locking under load changes or vibration environments, improves positioning accuracy and repeatability, meets the position stability requirements of high-end equipment, has a compact structure and high integration, reduces installation space and weight, and avoids safety hazards caused by slippage or displacement.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention relates to the technical field of mechanical transmission, in particular to a self-locking positioning ball spline, a system and a method.The self-locking positioning ball spline comprises a sliding rod, a sliding sleeve, a self-locking positioning actuator, a position sensing module and a control module, and at least one load roller path extending in the axial direction is arranged on the outer circumferential surface of the sliding rod; the sliding sleeve is arranged on the sliding rod, a ball circulation loop corresponding to the load raceway is arranged on the inner circumferential surface of the sliding sleeve, and a plurality of balls are arranged in the ball circulation loop, so that the sliding sleeve can slide in the axial direction of the sliding rod at low friction; the self-locking positioning actuator is arranged on the sliding sleeve, and the self-locking positioning actuator is configured to receive a locking instruction and apply mechanical acting force to the sliding rod, so that static friction force is generated to prevent relative movement between the sliding sleeve and the sliding rod, and self-locking positioning is achieved; the device is more stable and reliable in the occasions of vertical installation, bearing of non-directional external force or intermittent work, and potential safety hazards and precision loss caused by sliding or displacement are avoided.
Need to check novelty before this filing date? Find Prior Art