CN1584488A - Radius measuring instruments - Google Patents

Abstract

The invention relates to the field of measuring tools and cutting tools, specifically a radius measuring instrument, which is composed of a mechanical linkage device composed of a caliper, a middle slider, a right measuring slider, and an electronic measurement and calculation device, and is characterized in that the rear of the caliper 1 There is a linear chute A at the end, the middle slider 2 with a straight groove B is set on the caliper 1, and the right measuring slider 6 is provided with a linear chute C, which is set outside the middle slider 2, and the transmission pin 7 passes through it. Three grooves A, B, C connect the caliper 1 with the sliders 2 and 6, the middle measuring probe slider 4 passes through the square hole D at the front end of the middle slider 2 and can move up and down in the square hole D, mainly for measurement The radius of the arc whose angle is less than 180° that cannot be measured by a vernier caliper can be used to measure the concave-convex radius. Compared with the prior art, the invention has the advantages of simple structure, convenient operation and wide application range.

Description

A kind of apparatus for measuring radius

(technical field)

The present invention relates to measurer, cutlery field, a kind of specifically apparatus for measuring radius.

(background technology)

At present, mainly adopt radius caliper, obtain approximate data by the naked eyes paired observation for the measurement of minor radius, operation inconvenience, measuring accuracy is low.And, must adopt three-coordinates measuring machine for the measurement of long radius, and instrument costs an arm and a leg, and operation is comparatively complicated, needs location and demarcation etc.Apparatus for measuring radius shape of the present invention size is similar to vernier caliper, as shown in Figure 1, is mainly used in and measures that vernier caliper can't be measured, the angle radius less than 180 ° of circular arcs, can measure concavo-convex radius, when probe diameter is d, and measurement radius＞d.This apparatus structure is simple, and is easy and simple to handle, and usable range is wide.

(summary of the invention)

The present invention designs a kind of apparatus for measuring radius, by slide calliper rule, intermediate slider, compositions such as mechanical linkage that right measurement slide block etc. is formed and electronic surveying calculation element, the rear end that it is characterized in that slide calliper rule 1 has straight line skewed slot A, the intermediate slider 2 that has straight trough B is enclosed within on the slide calliper rule 1, the right measurement on the slide block 6 has straight line skewed slot C, be enclosed within outside the intermediate slider 2, trundle 7 passes three groove A, B, C is with slide calliper rule 1 and slide block 2,6 connect, middle measuring sonde slide block 4 passes the square hole D of intermediate slider 2 front ends and can move up and down in square hole D, slide calliper rule 1, right measurement slide block 6 and middle measuring sonde slide block 4 front ends are equipped with spheric probe X respectively, Y, Z, circuit board 3 is installed among the square groove H of intermediate slider 2 front ends, all there is displacement transducer on its two sides, and the face shield 5 of band liquid crystal display and button covers on the circuit board 3; Straight line skewed slot A on the slide calliper rule 1 should equate with right length, the angle of measuring the straight line skewed slot C on the slide block 6; Be respectively equipped with groove E, F on probe X, the Y, groove E, F can embed among the inserted sheet G, embed back X, Y, three probes of Z in line; On the circuit board 3 chip is housed, can accepts numerical value that displacement transducer passes,, show by the liquid crystal display on the face shield 5 according to calculation procedure result of calculation.Be mainly used in and measure that vernier caliper can't be measured, angle radius, can measure concavo-convex radius less than 180 ° of circular arcs.Compared with prior art the present invention is simple in structure, and is easy and simple to handle, and usable range is wide.

(Figure of description)

Fig. 1 is assembly figure of the present invention

Fig. 2 is an assembling explosive view of the present invention

Fig. 3 is basic functional principle figure of the present invention

Fig. 4 is an assembly of the present invention--initial zero position figure

Fig. 5 is an assembly of the present invention--optional position figure

Fig. 6 is the figure of the present invention when measuring convexity radius

Fig. 7 is the figure of the present invention when measuring recessed radius

(embodiment)

It is following that the invention will be further described in conjunction with the accompanying drawings.

Referring to accompanying drawing 2, wherein 1 is slide calliper rule; 2 is intermediate slider; 3 is circuit board; 4 is middle measuring sonde slide block; 5 is circuit board face shield (band liquid crystal display and button); 6 is the right slide block of measuring; 7 is trundle; 8 is nut; A is that the rear end of slide calliper rule 1 has the straight line skewed slot; B is the straight trough on the intermediate slider 2; C is the right straight line skewed slot of measuring on the slide block 6; D is the square hole of intermediate slider 2 front ends; E is the groove on the slide calliper rule 1; F is the right groove of measuring on the slide block 6; H is the square groove of intermediate slider 2 front ends; G is the inserted sheet on the middle measuring sonde slide block 4; X is the spheric probe on the slide calliper rule 1; Y is the right spheric probe of measuring on the slide block 6; Z is the spheric probe on the middle measuring sonde slide block 4.The rear end of slide calliper rule 1 has straight line skewed slot A, the intermediate slider 2 that has straight trough B is enclosed within on the slide calliper rule 1, the right measurement on the slide block 6 has straight line skewed slot C, be enclosed within outside the intermediate slider 2, trundle 7 passes three groove A, B, C is connected slide calliper rule 1 with slide block 2,6, when slide block 6 moves, promotes trundle 7 and rolls along skewed slot A, C, trundle 7 drives slide block 2 by straight-line groove B again and moves, and the displacement that has therefore guaranteed slide block 2 is half of slide block 6 all the time.Middle measuring sonde slide block 4 passes the square hole D of intermediate slider 2 front ends and can move up and down in square hole D, thereby has guaranteed that center probe 4 is positioned at the centre of 1,6 probes forever.Circuit board 3 is installed among the square groove H of intermediate slider 2 front ends, all there is displacement transducer (identical with the vernier caliper sensor) on its two sides, be used to measure L shown in Figure 3 and A1 numerical value, and data are delivered to chip result of calculation on the circuit board, show radius value by LCD Panel, present standard ohm Godson sheet is this calculation procedure not, must customization.

Referring to accompanying drawing 3, wherein 11,12,13 is three measuring sondes; R is for measuring radius; L is the center probe horizontal shift; A1 is the center probe perpendicular displacement; R1 is a real radius; R is the measuring sonde radius.The ultimate principle of apparatus for measuring radius of the present invention is to measure on the circular arc at 3 to obtain radius value by calculating, and computing method of the present invention and result are

R ²＝L ²+X ²

R＝X+A1

$R=\frac{L^2+{A1}^2}{2A1}$

R ₁＝R-r

In order to guarantee measuring accuracy, measurement point 11,13 generally should be greater than 90 ° to the angle between the center of circle, therefore require measuring instrument must adjust distance between the probe 11 and 13 when measuring different radii, measuring sonde 12 must be placed in the middle in the middle of requiring simultaneously, guarantees by linkage.

Three probes all are designed to the bulb shape, probe 11 at E place, probe 13 has groove at F place (Fig. 2), apparatus for measuring radius when reference position among (Fig. 4) groove E, the F embedding G, with guarantee three probes when the reference position in line.Because three probe parallel arranged, after the reference position zeroing, the first, the 3rd probe physical location is not 0, and have one initial apart from 2r (probe diameter), therefore when calculating, measured value L must be added 2r, therefore last radius calculation formula is:

$R_1=\frac{{(L+2r)}^2-{A1}^2}{2A1}-r$

In the formula:

R1-is the real radius through calculating at last;

The horizontal shift of L-center probe (measured value);

The perpendicular displacement of A1-center probe (measured value);

The radius of r-probe.

Claims (5)

1, a kind of apparatus for measuring radius, by slide calliper rule, intermediate slider, compositions such as mechanical linkage that right measurement slide block etc. is formed and electronic surveying calculation element, the rear end that it is characterized in that slide calliper rule 1 has straight line skewed slot A, the intermediate slider 2 that has straight trough B is enclosed within on the slide calliper rule 1, the right measurement on the slide block 6 has straight line skewed slot C, be enclosed within outside the intermediate slider 2, trundle 7 passes three groove A, B, C is with slide calliper rule 1 and slide block 2,6 connect, middle measuring sonde slide block 4 passes the square hole D of intermediate slider 2 front ends and can move up and down in square hole D, slide calliper rule 1, right measurement slide block 6 and middle measuring sonde slide block 4 front ends are equipped with spheric probe X respectively, Y, Z, circuit board 3 is installed among the square groove H of intermediate slider 2 front ends, all there is displacement transducer on its two sides, and the face shield 5 of band liquid crystal display and button covers on the circuit board 3.

2, a kind of apparatus for measuring radius as claimed in claim 1 is characterized in that the straight line skewed slot A on the slide calliper rule 1 should equate with right length, the angle of measuring the straight line skewed slot C on the slide block 6.

3, a kind of apparatus for measuring radius as claimed in claim 1 is respectively equipped with groove E, F on it is characterized in that popping one's head in X, the Y, and groove E, F can embed among the inserted sheet G, embeds back X, Y, three probes of Z in line.

4, a kind of apparatus for measuring radius as claimed in claim 1 is characterized in that on the circuit board 3 chip being housed, and can accept numerical value that displacement transducer passes, and according to calculation procedure result of calculation, shows by the liquid crystal display on the face shield 5.

5, a kind of apparatus for measuring radius as claimed in claim 1, it is characterized in that popping one's head in X, Y, Z all are designed to the bulb shape.

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