Level vernier caliper

Abstract

The invention discloses a level vernier caliper which is characterized in that the level vernier caliper comprises an upper arm and a lower arm which pass through a middle pore and are connected together by a major axis; the upper arm and the lower arm pass through a hole at one end and are connected at the lower ends of a main scale and an auxiliary scale by a minor axis; the main scale and a pad are arranged in a corresponding groove of the auxiliary scale; a structure for regulating a groove clearance of the main scale in the auxiliary scale is provided; a vernier and a pressure pad are arranged on the top of the notch of the auxiliary scale; a structure for adjusting and locking the exact position of the vernier on the auxiliary scale is provided. The main scale is provided with a plurality of scribed lines in increments of 1mm within limits; and the auxiliary scale is provided with 51 scribed lines in increments of 0.98mm; in a plane where a measuring round ball center passing through the upper arm and the lower arm is perpendicular to the major axis, the axel centers of the two minor axes arranged on the main scale and the auxiliary scale and the measuring round ball center passing through the upper arm and the lower arm are on a circle taking the axle center of the major axis as the center of the circle and are symmetry for the axle center of the major axis; the connecting line of the axel centers of the two minor axes is parallel to the movement direction of the auxiliary scale opposite to the main scale. The level vernier caliper can conveniently and quickly measure the diameter of a pinhole at the bottom of a micropore of mechanical spare parts or the diameter of an annular groove of the pinhole.

Description

technical field [0001] The invention relates to a measuring instrument for mechanical parts, especially a lever vernier caliper. Background technique [0002] Now there are small holes at the bottom of the large holes of some mechanical parts, and the measurement of the inner diameter cannot be completed with a common vernier caliper. And there is an annular groove in the small hole, the diameter of the bottom of this annular groove is more difficult to measure. Contents of the invention [0003] The object of the present invention is to provide a lever vernier caliper, which can easily measure the diameter of the small hole at the bottom of the large hole and the diameter of the annular groove on the small hole. [0004] The technical solution adopted by the present invention to solve the technical problem is: adopting the principle of leverage, the diameter of the inner hole groove reflected by the two measuring heads at one end of the lever is displayed on the vernier ...

AI Technical Summary

Problems solved by technology

[0002] Now there are small holes at the bottom of the large holes of some mechanical parts, and the measurement of the inner diameter cannot be completed with ordinary vernier calipers.

And there is an annular groove in the hole with a small size, the diameter of the bottom of the annular groove is more difficult to measure

Images