CN2137778Y

CN2137778Y - Oblique-scaled micrometering ruler

Info

Publication number: CN2137778Y
Application number: CN 92232102
Authority: CN
Inventors: 胡建军
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-08-28
Filing date: 1992-08-28
Publication date: 1993-07-07
Anticipated expiration: 2002-08-28

Abstract

The utility model relates to an oblique-scaled micrometering ruler, which is characterized in that the oblique-scaled micrometering ruler is composed of an upper measuring plate marked with graduations and a lower measuring plate marked with graduations. The inner edge of the upper measuring plate is a sloped edge; the inner edge of the lower measuring plate is a horizontal straight edge or a sloped edge; an opening shape having a certain spatial length is between the two inner edges; the two inner edges are intersected to form a right triangle or an isosceles triangle with the spatial length. A bevel can be made of lumbers, plastics and iron sheets. The utility model has the advantages of simple structure, low cost and convenience for carrying. Simultaneously the oblique-scaled micrometering ruler has higher precision which can reach 0.01 mm-0.001 mm.

Description

Oblique-scaled micrometering ruler

The utility model is the oblique mark micrometer that a kind of external diameter, thickness and length of confession Measuring Object is used.

Existing various micrometering instrument complex structure, cost of manufacture is higher, and it is all very inconvenient to use, carry.

The purpose of this utility model be to provide a kind of simple in structure, make easily the oblique mark micrometer that measuring accuracy is also higher.

The utility model is achieved in that going up of scale measured plate to oblique mark micrometer and the following plate of measuring is formed by indicating, an end of two measurement plate inner edges is closed and joins, it between two inner edges opening shape that certain space length is apart arranged, the inner edge of last measurement plate is a hypotenuse, the inner edge of measuring plate down is horizontal straight flange or hypotenuse, and two inner edges of measuring plate are given this space length form right angle triangle or isosceles triangle mutually.

Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9 are the structural representation of the design embodiment.

Figure 10, Figure 11, Figure 12, Figure 13, Figure 14 are the error synoptic diagram of measured object.

Below in conjunction with accompanying drawing the design is described in detail.

Tiltedly the mark micrometer is to be made of last measurement plate 1 and the following plate 2 of measuring, and upper and lower measurement plate can be an one-piece construction.The inner edge 3 of last measurement plate 1 joins with an end measuring the inner edge 4 of plate 2 down, can directly become the space right-angle triangle that inner edge 3 that go up to measure plate 1 and the inner edge 4 of measuring plate 2 down constituted or the summit of isosceles triangle, just measure starting point, as Fig. 1, Fig. 2, shown in Figure 3.Between the inner edge 3 of last measurement plate 1 and the inner edge 4 of measuring plate 2 down for the opening shape of one section space length is apart arranged, wherein, on measure plate 1 inner edge 3 be hypotenuse, the following inner edge 4 of measuring plate 2 is horizontal straight flange or hypotenuse.

In addition, measure plate 1 on and also be connected a hush panel 5, a reinforcement effect with the open-ended place of measuring plate 2 down.Hush panel 5 becomes the base of space right-angle triangle or isosceles triangle, micrometer is become have the general frame structure of space right-angle triangle or isosceles triangle, simultaneously, hush panel 5 also can indicate scale 6, measure plate 1 in the participation or measure determining of scale division value on the plate 2 down, as Fig. 5, Fig. 6, Fig. 7, shown in Figure 8.

In addition, also can increase on the inner end of the horizontal inner edge 4 of measuring plate 2 down has a vertical inner edge 7, with range extension, as Fig. 4, shown in Figure 8.

And, last measurement plate 1 and the inner end of measuring plate 2 down are by also slidably being connected with the perpendicular straight-bar 8 of measurement plate down 2, with further random range extension, as shown in Figure 9, straight-bar 8 can become one with last measurement plate 1 or the following plate 2 of measuring, slide up and down along measuring plate 2 down or going up measurement plate 1, fastening with screw or alternate manner simultaneously.

When the subtended angle α between the upper and lower measurement plate of given oblique mark micrometer, the fixed proportion that is had between corresponding scale on the utilization geometry principle, the tiny length that can derive measured object and chi concerns, thereby the value that can directly read tiny length.

When singly the mark micrometer is measured small thickness with Fig. 1, Fig. 2, Fig. 5, shown in Figure 6 being called, can not produce theoretic systematic error, as shown in figure 10.

When measuring article diameters such as cylinder, ball, soft fibre with single mark micrometer or Fig. 3, double scale shown in Figure 7, as long as subtended angle α is enough little, the theoretical system error can be omitted and be disregarded, and systematic error can derive with mathematical principle.Subtended angle α among Figure 11, Figure 12, Figure 13, Figure 14 is respectively 3.439 degree, 3.434 degree, 3.585 degree and 4.585 when spending, its relative error is respectively-0.900 ‰ ,+0.899 ‰ ,-0.800 ‰ and+0.801 ‰, can ignore.

Tiltedly the mark micrometer can be made by timber, plastics or sheet iron, and is simple in structure, cheap, is easy to carry, and also has higher precision simultaneously, (can reach 0.01mm-0.001mm).Because bevel can not cause extruding to measured object, thereby also can be used to measure the object of quality softness,, be with a wide range of applications as the diameter of cotton thread etc.

Claims

1, a kind of oblique mark micrometer, it is characterized in that going up of scale measured plate and the following plate of measuring is formed by indicating for it, an end of two measurement plate inner edges is closed and joins, it between two inner edges opening shape that certain space length is apart arranged, wherein, the inner edge of last measurement plate is a hypotenuse, and the inner edge of following measurement plate is horizontal straight flange or hypotenuse, and two inner edges of measuring plate are given this space length form right angle triangle or isosceles triangle mutually.

2, oblique mark micrometer as claimed in claim 1 is characterized in that measuring plate and is connected a hush panel with the open-ended place of measuring plate down, and hush panel, upper and lower measurement plate formation have the general frame structure of space right-angle triangle or isosceles triangle.

3, oblique mark micrometer as claimed in claim 1 or 2 is characterized in that on the inner end of the horizontal inner edge of measuring plate down also increasing that vertical inner edge is arranged.

4, oblique mark micrometer as claimed in claim 1, the inner end that it is characterized in that measuring plate and measuring plate down is by being slidingly connected with the following perpendicular straight-bar of plate of measuring.

5, oblique mark micrometer as claimed in claim 4 is characterized in that straight-bar and last measurement plate or measures plate down becoming one.