CN2031909U

CN2031909U - Dual-vernier type vernier callipers with 0.005 mm accuracy

Info

Publication number: CN2031909U
Application number: CN 88218197
Authority: CN
Inventors: 华祖贤
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-07-22
Filing date: 1988-07-22
Publication date: 1989-02-01

Abstract

The utility model relates to a dual-vernier type vernier caliper with 0.005mm accuracy, particularly a measuring tool. The utility model is composed of a main ruler, two auxiliary rulers, a locking screw, an upper sharp foot and a lower foot. The length of the graduation in each lattice of the main ruler is 1mm, the effective length of the auxiliary ruler I (2) is 98mm, the uniform graduation is provided with 100 lattices, the effective length of the auxiliary ruler II (3) is 97.5mm, and the auxiliary ruler II (3) is uniformly divided into 100 lattices. The main ruler and the auxiliary rulers I, II can mutually form three kinematic pairs which can move relatively. The utility model has the advantages of simple structure, convenient operation and high measuring accuracy.

Description

Dual-vernier type vernier callipers with 0.005 mm accuracy

The utility model relates to a kind of metering outfit, particularly a kind of vernier caliper of measurement mechanical workpiece size.

Vernier measuring tool is the metering outfit of the class internal diameter, external diameter, width, length and the angle that are directly used in measuring workpieces, is widely used in production and checkout procedure in the machinery manufacturing industry.The vernier caliper that uses all is a single vernier now, is made up of a main scale and one pair of chi, and it is simple in structure, easy to use, but along with the continuous development of industry, the accuracy requirement of workpiece is more and more higher, and existing single vernier measurer can not satisfy the requirement of high-acruracy survey.

The purpose of this utility model provides the vernier caliper of a kind of high precision, double vernier, to satisfy the needs of high measurement accuracy.

Scheme of the present utility model be achieved in that 0.005 millimeter accuracy vernier caliper of double vernier by main scale, pay the chi I, pay the chi II, holding screw, go up spur, get a foothold and form, on main scale, be equipped with in addition and pay the chi II, according to certain rules a main scale and a pair chi are divided into some scales, main scale, pair chi I, a pair chi II are formed three pairs of kinematic pairs that can relatively move mutually, regulate holding screw, by main scale and the dimensional accuracy that cooperatively interacts measuring workpieces of paying chi, paying chi and paying chi.

Description of drawings: Fig. 1: the utility model structural representation

Fig. 2: the utility model counting principle number

Below in conjunction with accompanying drawing the utility model is described in detail.

0.005 millimeter accuracy vernier caliper of double vernier of the present utility model is made up of main scale (1), pair chi I (2), pair chi II (3), holding screw (4), last spur (5), leftover bits and pieces (6) and shell fragment (7), on main scale and pair chi I, all be provided with spur and leftover bits and pieces on one, main scale is sleeved on to be paid in the chi I, each other slidably, it is overlapping to pay chi II and main scale, also be sleeved on and pay in the chi I, can and pay the chi I and slide mutually with main scale, every lattice scale length be 1 millimeter on the main scale; Paying chi I effective length is 98 millimeters, evenly scale 100 lattice; Pay 97.5 millimeters of chi II effective lengths, also divide equably to be carved into 100 lattice.Main scale, pair chi I, a pair chi II are formed three pairs of kinematic pairs that can relatively move mutually, and holding screw (4) is installed in to be paid on the chi I, regulates the degree of tightness of holding screw, gets final product the various sizes of measuring workpieces by the mutual motion of main scale, pair chi I and pair chi II.

The using method and the common calliper using method of 0.005 millimeter accuracy vernier caliper of this double vernier are basic identical, different is before reading, at first must move and pay chi II (seeing accompanying drawing 2), its left end position zero line is alignd with measured size integral lattice line (figure is 20 lattice), look then on its pair chi II which lattice groove with pay the chi I on a certain groove align, count n with the lattice of paying this groove on the chi II again and take advantage of and show that the value of reading Δ l gets measured size fraction part (illustrated dimensions is 0.095 millimeter).

What need here to indicate is, under certain conditions, pays a chi II when moving to left, and there is no corresponding groove and aligns with a pair chi I groove.This is because the fraction part of measured size, at this moment needs to pay the chi II greater than 0.5 millimeter to move right, allow its right-hand member position zero line aim to pay chi I right-hand member position zero line right this lattice groove of main scale (seeing shown in accompanying drawing (2) figure below), be illustrated as the 120th lattice.Look then and pay that n lattice groove aligns with certain lattice groove on pair chi I on the chi II, fraction part Δ K=n. Δ l+0.5, (figure is 56 * 0.005+0.5=0.78 millimeter), the physical size of measured size is // 21.78 millimeters.

0.005 millimeter accuracy vernier caliper of double vernier of the present utility model, simple in structure, easy to operate, the certainty of measurement height can reach ± 0.005 millimeter precision.

Claims

1,0.005 millimeter accuracy vernier caliper of a kind of double vernier, comprise main scale, pair chi I, holding screw, go up spur, pin and shell fragment, it is characterized in that having increased by one on the basis of paying the chi I pays the chi II, pay overlapping being sleeved on of chi II and main scale and pay in the chi I, and can slide relatively each other.

2, vernier caliper according to claim 1 is characterized in that every lattice scale of main scale is 1 millimeter, and the effective length of paying the chi I is 98 millimeters, and evenly scale becomes 100 lattice, pays 97.5 millimeters of chi II effective lengths, and evenly scale becomes 100 lattice.

On same architecture basics, will pay chi I effective length and foreshorten to 49 millimeters, evenly be carved into/50 lattice, to pay its effective length of chi II and foreshorten to 48.5 millimeters, the reading accuracy that evenly is carved into 50 lattice is 0.01 millimeter a dimension double vernier measurer.