Ejector pin for mechanical speed sensor

Abstract

The invention belongs to a mechanical speed sensor design technology, and relates to improvement of an ejector pin of a mechanical speed sensor. The ejector pin is characterized in that two spherical surfaces (2) are each provided with a blind hole (5), the positions, close to the spherical surfaces (2), at the two ends of a cylinder (1) are each provided with an annular oil feed groove (3), the groove bottoms of the oil feed grooves (3) are each provided with an oil inlet hole (4) communicated with the corresponding blind hole (5), and two to four oil drain grooves (6) evenly distributed in the peripheral direction are formed in the spherical surfaces (2). By means of the improved ejector pin for the mechanical speed sensor, the spherical surfaces of the ejector pin and a ball socket of an ejector pin base can be cooled, the heat generated due to friction is lowered, the temperature generated in the working processes of the spherical surfaces of the ejector pin and the ball socket of the ejector pin base is lowered, and the service life is prolonged.

Description

technical field [0001] The invention belongs to the design technology of a mechanical rotational speed sensor and relates to the improvement of a thimble used for a mechanical rotational speed sensor. Background technique [0002] A current thimble structure for mechanical speed sensors can be found in figure 1 , which consists of a cylinder 1 and spherical surfaces 2 at both ends of the cylinder 1. The spherical surface 2 is in contact with the ball socket on the thimble seat in the form of a pair. When working, the thimble 1 is responsible for transmitting the axial force value signal, and rotates at a high speed relative to the ball socket on the thimble seat centered on its own axis. Its disadvantages are: the spherical surface of the thimble and the ball socket of the thimble seat wear a lot, and the service life is low. The reason is that due to the limitation of technology and processing technology, it is difficult for the spherical surface of the thimble and the ba...

AI Technical Summary

Problems solved by technology

The disadvantages are: the spherical surface of the thimble and the ball socket of the thimble seat are greatly worn, and the service life is low

The reason is that due to the limitation of technology and processing technology, it is difficult for the spherical surface of the thimble to perfectly match the ball socket of the thimble seat. The contact stress at the spherical surface of the thimble is relatively large, resulting in a large amount of friction heat. When the wear increases to a certain extent, the thimble will produce signal deviation, or even complete failure

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