A falling ball testing machine that can accurately locate the center point of steel balls

Abstract

The invention discloses a ball falling test machine capable of accurately positioning a central point of a steel ball. The ball falling test machine comprises a base, a lifting guide rod, an electromagnet, wherein the lifting guide rod is arranged on the base, and the electromagnet is arranged on the lifting guide rod through a connecting rod. A spherical groove for adsorbing the steel ball is arranged on the lower surface of the electromagnet. The ball falling test machine further comprises an inverted conical fixture comprising a shell body which is sleeved on the electromagnet from bottom to top. A slot opening for containing the connecting rod in arrangement in sleeved mode is arranged on the side wall of the shell body. An inverted conical body is arranged in the shell body, and the inner wall of the inverted conical body is attached to the lower surface of the steel ball in the groove. The central line of the inverted conical body is overlapped with that of the tubular shell body. The ball falling test machine capable of accurately positioning the central point of the steel ball is simple in structure, and convenient to test, and can quickly and accurately position the falling point of the steel ball, and improves test efficiency and test accuracy.

Description

technical field [0001] The invention relates to a testing device for impact resistance, in particular to a falling ball testing machine capable of accurately locating the center point of a steel ball. Background technique [0002] Electronic devices with screens, such as notebook computers, tablet computers, mobile communication terminals, liquid crystal screens and other test models, need to test the impact resistance of their bodies. [0003] At present, the test machines used in the market rely on visual inspection to align the center point of the falling ball with the test point of the object under test. Since the size of the steel ball needs to be changed (that is, the quality of the steel ball changes) during the test, there are the following disadvantages: [0004] The object to be tested is located below the steel ball, and the steel ball is attracted by the magnetic force generated by the electromagnet above it. Since the steel balls of various diameters are attract...

AI Technical Summary

Problems solved by technology

[0004] The object to be tested is located below the steel ball, and the steel ball is attracted by the magnetic force generated by the electromagnet above it. Since the steel balls of various diameters are attracted by the upper electromagnet, the center position cannot be guaranteed, and often If the steel ball deviates, once the electromagnet is powered off, the steel ball will fall freely, which will lead to inaccurate landing of the steel ball

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