Caliper

Abstract

The invention relates to a measuring tool, provides a linear dimensional measurement tool, and especially a caliper. The caliper includes two states of an inside caliper and an outside caliper. The caliper comprises a pair of caliper arms which are arranged symmetrically and crosswise articulated through a rotational pin. One side of each caliper arm is a clamping segment and the other side is a reading segment, and the clamping segment and the reading segment are partitioned by the rotational pin. Caliper heads having adjustable included angles with the caliper arms in a plane defined by a pair of caliper arms are arranged at the ends of the clamping segments. The two caliper heads with the front tips are arranged symmetrically. When the caliper heads incline inwardly, the caliper is the inside caliper. When the caliper heads incline outwardly, the caliper is the outside caliper. A reading device for reflecting the inside caliper length and the external caliper length is arranged at the reading segments. When the caliper heads incline inwardly to limit positions, an included angle of a caliper head axis and a clamping segment axis is 12 degrees. When the caliper heads incline outwardly to limit positions, an included angle of the caliper head axis and the clamping segment axis is 25 degrees. The front ends of the caliper heads are in a wedge shape.

Description

technical field [0001] This technology relates to measuring tools, and provides a linear dimension measuring tool, especially a caliper, which can be used as an inner caliper when measuring dimensions such as wall thickness, and can be used as an outer caliper when measuring dimensions such as inner hole diameter, and can be used directly Read out the measurement data. Background technique [0002] In the prior art, when measuring linear dimensions such as wall thickness, inner hole diameter, and groove width of parts, inner calipers and outer calipers are often used for auxiliary measurement. After the opening of the calipers corresponds to the size to be measured, the calipers need to be removed. Using other measuring tools to measure the linear dimension of the caliper opening, the test results are affected by the skills of the inspectors, it is difficult to ensure that the caliper opening does not change, and it is also difficult to ensure the accuracy of the measurement...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, when measuring linear dimensions such as wall thickness, inner hole diameter, and groove width of parts, inner calipers and outer calipers are often used for auxiliary measurement. After the opening of the calipers corresponds to the size to be measured, the calipers need to be removed. Use other measuring tools to measure the linear dimension of the caliper opening. The test results are affected by the skills of the inspectors. It is difficult to ensure that the caliper opening does not change, and it is difficult to ensure the accuracy of the measurement.

In addition, the common caliper in the prior art is a single inner caliper and outer caliper, which has a single function, cannot directly read the measurement results, and cannot meet the requirements of direct and effective measurement.

Images