Clamp

Abstract

The invention relates to a measuring tool, and provides a linear size measurement tool, especially a clamp. The clamp has two states: internal clamping and external clamping. The clamp comprises a pair of clamp arms which are arranged symmetrically and are hinged in a crossing manner through a rotating pin. A part, located at one side of the rotating pin, of each clamp arm serves as a clamping segment, and a part, located at the other side of the rotating pin, of each clamp arm serves as a reading segment. An end part of each clamping segment is provided with a clamping head, wherein the inclined angle between the clamping head and the corresponding clamp arm in a plane defined by the pair of clamp arms can be adjusted. The two clamping heads with the pointed front ends are arranged symmetrically. When the clamping heads are inclined inwards, the clamp is in the state of internal clamping; when the clamping heads are inclined outwards, the clamp is in the state of external clamping. The reading segments are provided with reading devices which are used for reflecting an internal clamping length and an external clamping length. When the clamping heads are inclined inwards to a limit position, the inclined angles between the axes of the clamping heads and the axes of the clamping segments are 12 degrees; when the clamping heads are inclined outwards to a limit position, the inclined angles between the axes of the clamping heads and the axes of the clamping segments are 25 degrees; The front ends of the clamping heads are conical.

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.

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