The invention discloses a
detector for a pointer shaft of an automobile instrument, relates to shaft detectors and aims at solving the problems that in traditional detection a pointer shaft is placed in a small
optical axis manually, a non-key part is detected by a filler gauge, the size of a key part of the pointer shaft is obtained via theoretical reckoning, and further a detection result is fuzzy and inaccurate and has large error and the detection type is single. The
detector comprises a pedestal, a vertical plate, a pointer fixing seat, a linear bearing, a pointer plate, a cylinder, a
vacuum pump and two guide posts, the vertical plate is fixedly mounted on the pedestal, the two guide posts are arranged on the pedestal in parallel vertically, the vertical plate over the pointer plate is provided with the cylinder which is arranged vertically, a driving rod of the cylinder penetrates the pointer plate and is fixedly connected with the pointer plate, the
tail end of the driving rod of the cylinder is connected with the pointer fixing seat, the pointer fixing seat is provided with a vacuum cavity communicated with an installation groove, and the
vacuum pump is communicated with the vacuum cavity of the pointer fixing seat via a negative-pressure air tube. The
detector is used for instrument pointer shaft detection.