High-precision axial length measurement device

Abstract

The invention discloses a high-precision axial length measurement device. The device comprises a bottom plate, base fixing bolts, a sleeve base, a centre feeding bolt, centre adjusting bolts, a guide sleeve, a first centre, a second centre, a centre fastening bolt, a transition rod and a supporting column. The sleeve base is connected with the bottom plate; the guide sleeve is connected with the sleeve base; the first centre is embedded into a first cavity of the guide sleeve; the centre adjusting bolt is arranged on the side wall of the sleeve base and capable of adjusting positions of the guide sleeve in the X direction and the Y direction; the sleeve base is provided with a second cavity, and the centre feeding bolt in the second cavity penetrates a hole of the sleeve base to be in compression joint with the bottom end of the first centre; the second centre is connected with one end of the transition rod through the centre fastening bolt; the upper end of the supporting column is connected with the other end of the transition rod; the lower end of the supporting column is connected with the bottom plate. The high-precision axial length measurement device has the advantage that high efficiency and accuracy in in-situ measurement of high-precision axial dimensions are realized.

Description

technical field [0001] The invention relates to the field of measuring gyro motor components, in particular to a high-precision axial length measuring device. Background technique [0002] Small-sized, high-precision parts such as shafts are key components of gyro motors, and their precision directly determines the performance and reliability of gyro motors. Due to the high dimensional accuracy of the axial length of the shaft and the small contact surface of each shaft, it is impossible to use measuring tools such as vernier calipers for measurement. In the past, the axial length of the shaft was measured using a traditional universal tool microscope. The two tips of the universal tool microscope cooperated with the tip holes at both ends of the shaft to achieve the horizontal support and fixation of the shaft. The inspector needs to read it through the comparison eyepiece. The line scale values ​​corresponding to the end faces of each section of the shaft are then subtrac...

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Problems solved by technology

[0003] In this way, during the measurement process, the operator needs to repeat similar actions, find the line scale value corresponding to the end face many times and record it in time. When the batch size is large, the visual and mental work will be greatly consumed, resulting in low inspection efficiency and visual errors; when the axis When the end face and the line scale of the universal tool microscope are not completely parallel, that is, a line cannot be accurately found to coincide with the end face of a shaft. At this time, there is a problem of inability to measure. The inspector needs to find a corresponding highest point and a lowest point. Tick ​​marks, calculated separately, there is a visual error

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