CN213021297U

CN213021297U - Dual-purpose micrometer caliper for measuring curved surface and plane

Info

Publication number: CN213021297U
Application number: CN202021958593.XU
Authority: CN
Inventors: 王亚男; 刘恩泽
Original assignee: Baotou Iron and Steel Group Co Ltd
Current assignee: Baotou Iron and Steel Group Co Ltd
Priority date: 2020-09-09
Filing date: 2020-09-09
Publication date: 2021-04-20
Anticipated expiration: 2030-09-09

Abstract

The utility model discloses a measure dual-purpose micrometer caliper in curved surface and plane, including the micrometer caliper body, the micrometer caliper body sets up two measurement ends on semicircular connecting rod including the symmetry, two the prong of measuring the end divide into the toper and adds ball structure so that it is the point type contact with the contact surface, two but measurement end periphery side still is provided with the restriction sleeve pipe of back-and-forth movement, adjusts the restriction sleeve pipe can make it relative measure the end back-and-forth movement so that the prong of measuring the end divides to expose or be located in the restriction sleeve pipe.

Description

Dual-purpose micrometer caliper for measuring curved surface and plane

Technical Field

The utility model relates to a measure dual-purpose micrometer caliper of curved surface and plane.

Background

The micrometer screw is made according to the principle of screw amplification, i.e. the screw rod is rotated once in the nut, and the screw rod is advanced or retreated by a distance of one screw pitch along the direction of the rotation axis. Thus, a slight distance of movement in the axial direction can be represented by a circumferential reading. During measurement, when the measuring anvil and the micrometer screw are closed, if the zero point of the movable scale is just coincided with the zero point of the fixed scale, the micrometer screw is screwed out, the surfaces of the measuring anvil and the micrometer screw are just contacted with two ends of the length to be measured, if the surfaces of the measuring anvil and the micrometer screw are not rotated forcefully or the measurement is not accurate, the ratchet wheel rotating handles on the left and the right are slowly rotated until the sound is transmitted and clicks when the surfaces of the measuring anvil and the micrometer screw are contacted with the measuring surface immediately, and then the distance of the micrometer screw moving rightwards is the measured length. The whole millimetre of this distance is read on the fixed scale and the decimal part is read on the movable scale.

However, the standard micrometer screw gauge only provides one measuring head, namely a cylindrical measuring head, the measuring head is only suitable for objects with straight surfaces, and the problem of size deviation caused by replacing the measuring head is not easily solved, so that other improved micrometer screw gauges only have one measuring head, and the purpose of converting the measuring head at any time cannot be realized. The utility model discloses a micrometer caliper can provide plane, the two kinds of measuring methods of curved surface under the prerequisite of guaranteeing that measurement accuracy does not receive the loss, and is simple easy-to-use, thinks about the novelty.

The measuring head of the cylindrical surface screw micrometer (CN202329452U) is a spherical groove with fixed size, has the advantages of being applicable to curved surface measurement, and has the defects of only being capable of measuring curved surfaces within a specific radius range and extremely small using range;

the patent "a screw micrometer for measuring thickness" (CN210141818U) can be dismantled flexibly, adopt the mode of punching and measuring, can realize the measurement to the wall thickness of the enclosed construction product, but it can only measure on the straight surface still, can't carry on the accurate measurement to the curved surface sample;

in the thesis "design and process of small tip outside micrometer for support to be measured", sun literary field "tool technology", 2014 2, a tip micrometer screw is described, which can realize measurement of curved surface, but a measuring head is not integrated on a measurer, and an accurate measurement plane and a softer object cannot be converted.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a measure dual-purpose micrometer caliper in curved surface and plane can switch two kinds of measurement ends immediately to the measurement needs that adapt to different surfaces.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the micrometer caliper for measuring curved surfaces and planes comprises a micrometer caliper body and is characterized in that the micrometer caliper body comprises two measuring ends which are symmetrically arranged on a semicircular connecting rod, the sharp heads of the two measuring ends are of conical and spherical structures so as to be in point contact with a contact surface, limiting sleeves capable of moving back and forth are further arranged on the peripheral sides of the two measuring ends, and the limiting sleeves can be adjusted to move back and forth relative to the measuring ends so that the sharp heads of the measuring ends are exposed or positioned in the limiting sleeves.

Further, the limiting sleeve is in threaded fit with the measuring tip.

Furthermore, the restriction sleeve pipe with the measurement end passes through the cooperation of spring catch joint, the spring catch set up in on the measurement end, be provided with on the restriction sleeve pipe along its length direction a plurality of with the through-hole of spring catch adaptation.

Compared with the prior art, the utility model discloses a beneficial technological effect:

the utility model discloses simple structure, convenient to use makes its relative measurement end back-and-forth movement through adjusting the restriction sleeve pipe, can make the prong portion of measuring the end exposes or is located in the restriction sleeve pipe to realize switching two kinds of measurement ends, with the measurement needs that adapt to different surfaces.

Drawings

The present invention will be further explained with reference to the following description of the drawings.

FIG. 1 is a schematic structural view of a micrometer screw for measuring both curved surfaces and flat surfaces according to the present invention;

description of reference numerals: 1-measuring end, 2-reading area, 3-spiral measuring rod and 4-connecting rod; 5-restraining the cannula.

Detailed Description

As shown in fig. 1, the micrometer caliper for measuring curved surfaces and flat surfaces comprises a micrometer caliper body, wherein the micrometer caliper body comprises a spiral measuring rod 3, a reading area 2 and a semicircular connecting rod 4, the micrometer caliper body comprises two measuring tips 1 symmetrically arranged on the semicircular connecting rod 4, the tips of the two measuring tips 1 are conical and ball-headed structures so as to be in point contact with a contact surface, limiting sleeves 5 capable of moving back and forth are further arranged on the outer peripheral sides of the two measuring tips 1, and the limiting sleeves 5 can be adjusted to move back and forth relative to the measuring tips 1 so as to expose or locate the tips of the measuring tips 1 in the limiting sleeves 5.

In this embodiment, the restraining sleeve 5 is threadedly engaged with the measuring tip.

The size of a plane object is measured, the limiting sleeve 5 is kept to be locked at the outermost edge, the tip part of the measuring end 1 is kept to be located in the limiting sleeve 5, the end of the micrometer caliper is required to be closed and zeroed before measurement, and after error calibration, the error is counted into the final measuring result to be corrected. The measurement can then be started.

And (3) measuring the size of the curved object, and rotating the rotation limiting sleeve 5 until the measuring tip 1 is exposed out of the tip and does not influence the measurement. Before measurement, the end of the micrometer screw needs to be closed and zeroed, and after the standard error is corrected, the error is counted into the final measurement result. The measurement can then be started.

In another embodiment, the limiting sleeve is in clamping fit with the measuring end head through a spring pin, the spring pin is arranged on the measuring end head, and a plurality of through holes matched with the spring pin are formed in the limiting sleeve along the length direction of the limiting sleeve.

The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should also be able to make various modifications and improvements to the technical solution of the present invention without departing from the spirit of the present invention, and all such modifications and improvements are intended to fall within the scope of the present invention as defined in the appended claims.

Claims

1. The micrometer caliper for measuring curved surfaces and planes comprises a micrometer caliper body and is characterized in that the micrometer caliper body comprises two measuring ends which are symmetrically arranged on a semicircular connecting rod, the sharp heads of the two measuring ends are of conical and spherical structures so as to be in point contact with a contact surface, limiting sleeves capable of moving back and forth are further arranged on the peripheral sides of the two measuring ends, and the limiting sleeves can be adjusted to move back and forth relative to the measuring ends so that the sharp heads of the measuring ends are exposed or positioned in the limiting sleeves.

2. A dual-purpose micrometer screw for measuring both curved and planar surfaces according to claim 1, wherein the restraining sleeve is threadably engaged with the measuring tip.

3. The micrometer caliper for measuring curved surfaces and planar surfaces according to claim 1, wherein the limiting sleeve is in clamping fit with the measuring end head through a spring pin, the spring pin is arranged on the measuring end head, and a plurality of through holes matched with the spring pin are formed in the limiting sleeve along the length direction of the limiting sleeve.