Self-locking auto-centering target ball mounting seat

Abstract

The invention discloses a self-locking auto-centering target ball mounting seat used for mounting the target ball of a laser tracer; the inner wall circle of a locating central hole (15) of the sleeve (2) of the target ball seat is provided with needle roller slots (14) which are at least arranged in trisection and used for arranging a needle roller (4); at least one cross surface of the coaxial direction of a locating guide column (9) is a polygon; and the coaxial squeezing surface (8) on each side is corresponding to one needle roller (4) assembled in the needle roller slot (14). As squeezing force is generated to the needle roller when the central saddle of the target ball is rotated, the needle roller is led to move outwards to squeeze and clamp a measured hole, so as to automatically lock and fix the target ball mounting seat, thus realizing the excellent tight static matching between the guide column of the central saddle and the measured hole. The target ball automatically centered in the central saddle of the target ball is led to be automatically positioned to the center of the mounting hole and be able to reduce the mounting error of the target ball mounting seat. The invention is suitable for measuring the mounting holes with the hole tolerance less than IT12 and the diameter between 10mm and 50mm.

Description

technical field [0001] The invention relates to a target ball installation seat for tracking and measuring the coordinate value of the center of the target ball by a laser tracker. Background technique [0002] Laser tracking measurement technology has a wide range of applications in precision manufacturing, aviation and aerospace, shipbuilding, assembly and testing of automobile manufacturing and other fields. The principle of laser tracking measurement is: the light beam hit by the laser on the corner cube returns in the same way, and the coordinate value of the position of the target ball can be calculated according to the direction of the laser emission and the distance from the laser emission point to the target ball. Laser tracking measurement is characterized by large measurement range and high measurement accuracy. For example, the measurement radius of the Leica LTD840 laser tracker is 40m, and the measurement accuracy in the full range can reach ±15μm+6μm / m. Sinc...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a low-precision measuring hole with a diameter tolerance of less than IT12 and a diameter of 10mm-50mm, which cannot achieve a good fit between the guide column and the measured hole, and to provide a device that can reduce installation errors, is not easy to loose, and has automatic Self-locking self-centering target ball mount with positioning and self-locking functions

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