Inner hole detection head

Abstract

The invention relates to the technology of inner hole detection, in particular to an inner hole detection head. The inner hole detection head is provided with a cylindrical shell. An ejector rod is installed in the lower end portion of the shell through a support. A detection jaw is arranged at the lower end of the ejector rod. The upper end portion of the ejector rod is sleeved with a balance spring. The upper end of the ejector rod is connected with a telescopic arm of an ejection air cylinder. The lower end portion of the ejector rod is provided with a detection cross rod. A detection rod is arranged in the side, provided with the ejector rod, of the shell. The lower end of the detection rod is provided with a contact type digital displacement sensor. The contact type digital displacement sensor abuts against the detection rod. According to the inner hole detection head, based on whether the difference obtained through comparison between data which are actually detected and benchmark data exists in a tolerant difference range or not, a good product and a defective product can be distinguished. In the whole detection process, a precise pressure regulating valve controls the detection pressure. Considering that it is possible that a self-locking phenomenon happens to a two-degree taper angle, the balance spring 7 has the function of detection pressure balancing and the function of the improvement of the air cylinder resetting ability.

Description

technical field [0001] The invention relates to an inner hole detection technology, in particular to a detection head for the inner hole of a commutator with convenient operation, stable operation and high degree of automation. Background technique [0002] We know that the commutator commonly used in DC motors has high requirements for the accuracy of the inner hole of the commutator, especially the roundness of the inner hole and the tolerance requirements of the hole diameter are extremely strict. Now it is generally tested manually with a micrometer. The disadvantages are low work efficiency, inaccurate test data, and incomplete test items, so it is impossible to manually test the accuracy of the inner hole in mass production. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a detection head with convenient operation, stable operation and high degree of automation, which is especially s...

AI Technical Summary

Problems solved by technology

[0002] We know that the commutator commonly used in DC motors has high requirements for the accuracy of the inner hole of the commutator, especially the roundness of the inner hole and the tolerance requirements of the hole diameter are extremely strict. Now it is generally tested manually with a micrometer. The disadvantages are low work efficiency, inaccurate test data, and incomplete test items, so it is impossible to manually test the accuracy of the inner hole in mass production

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