A screw-type ball lock

By designing annular grooves and circular structures in screw-type ball locks, the problem of screw-type ball locks being unable to prevent lubricating oil leakage and external contamination is solved, achieving both sealing effect and connection stability.

CN224515615UActive Publication Date: 2026-07-17DONGGUAN GOOD MOBILE ELECTRONICS TECH CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Utility models(China)
Current Assignee / Owner
DONGGUAN GOOD MOBILE ELECTRONICS TECH CO LTD
Filing Date
2025-07-25
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing screw-type ball locks cannot prevent external contamination and lubricant leakage.

Method used

A screw-type ball lock is designed. By opening a first annular groove and a second annular groove on the ball lock shaft, the steel ball expands radially elastically when the nut screw is screwed in, tightly fitting the ball and forming an initial seal and frictional resistance. The ring provides self-compensating clamping force, preventing lubricating oil leakage and isolating external contaminants.

Benefits of technology

It effectively prevents lubricating oil leakage, protects bearings and precision moving parts, blocks external dust and metal debris, and ensures the stability and accuracy of the connection.

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Abstract

The utility model discloses a screw type ball lock, including machine screw and circular through -slot, machine screw is fixedly connected with the steel ball on, the utility model discloses, when screwing into machine screw, axial pressure makes the steel ball of machine screw tail radial elastic expansion, closely fits the sphere, forms initial sealing and frictional resistance, thread tooth extrusion circular through -slot, produces additional normal stress and enhances locking effect, and the pre -tightening force makes the static friction force between the connecting piece, offsets external vibration or lateral load, prevents machine screw rotation, when the connecting piece is deformed or the installation exists angle deviation, the sphere adjusts the angle and keeps even pressure tightly, and the continuous radial expansion of ring provides self -compensation pressure tightly, offsets the pre -tightening force attenuation caused by vibration, and the ring can effectively prevent internal lubricating oil from leaking outward, and the ring can synchronously block the invasion of external dust, metal scrapes and other pollutants into the shafting, and the bearing and precision movement parts are protected.
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Claims

1. A screw-type ball lock, comprising a nut screw (1), a ball lock shaft (2), a steel ball (3), a ball (4), a ring (5), a threaded groove (7), and a circular through groove (9), characterized in that: A steel ball (3) is fixedly connected to the nut screw (1).

2. A screw-type ball lock according to claim 1, characterized in that: The nut screw (1) is fitted into the circular through groove (9).

3. A ball-lock according to claim 2, wherein: The circular through groove (9) is formed on the ball lock shaft (2).

4. A ball-lock according to claim 3, wherein: A ring (5) is fitted into the groove opened on the ball lock shaft (2).

5. A ball-lock according to claim 4, wherein: A ball (4) is embedded in the through hole of the ball lock shaft (2).

6. A ball-lock according to claim 5, wherein: The sphere (4) is in close contact with the steel ball (3).

7. A ball-lock according to claim 5, wherein: The ball lock shaft (2) is provided with a first annular groove (6) and a second annular groove (8).