CN2370383Y - Directly reading circular arc outer diameter callipers - Google Patents
Directly reading circular arc outer diameter callipers Download PDFInfo
- Publication number
- CN2370383Y CN2370383Y CN 99231087 CN99231087U CN2370383Y CN 2370383 Y CN2370383 Y CN 2370383Y CN 99231087 CN99231087 CN 99231087 CN 99231087 U CN99231087 U CN 99231087U CN 2370383 Y CN2370383 Y CN 2370383Y
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- measuring
- blade
- circular arc
- jaws
- jaw
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- Expired - Fee Related
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- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
The utility model direct-reading circular-arc outer diameter calliper, which can be directly read and can measure the outer diameter of a circular arc. The caliper comprises two measuring jaws 2 that are in an identical plane, and a ruler body 1, wherein, two measuring planes 3 of the measuring jaws 2 and the ruler body 1 present two identical included angles alpha 1 and alpha 2 that are about 126.873DEG. One of the two measuring jaws 2 is a stationary jaw 2 that is fixedly installed at the front end of the ruler body 1, and the other measuring jaw is a movable measuring jaw 2 that is fixedly installed on a vernier 4 or a movable ruler frame of such length measurers as a grid digital display device, etc. In measurement, a circle arc to be measured is separately put to be tangential with the measuring planes 3 of the two measuring jaws 2 and the ruler body 1 of the caliper, and the outer radius of the circle arc can be directly read out.
Description
The utility model relates to a kind of direct reading, as to be with scale or mark slide calliper rule, particularly a kind of direct-reading slide calliper rule of measuring the circular arc external diameter of being used for.
Non-full circle shape workpiece less than semicircle is present in the manufacturing process with various forms, when making and using these workpiece, usually needs to measure its external diameter size.But up to the present, measure the radius less than the non-full circle shape workpiece of semicircle, be a very complicated loaded down with trivial details problem always, must measure ruler indirectly with many.
The purpose of this utility model is to disclose a kind of slide calliper rule that can directly measure the circular arc external diameter.
The purpose of this utility model is achieved in that these direct-reading circular arc external diameter slide calliper rule comprise blade and two measuring jaws that are in the same plane, are about 126 ° 52 ' 12 between the measurement plane of measuring jaw and the blade "; Wherein have at least a measuring jaw to move with respect to another measuring jaw; Distance between two measuring jaws and the blade joining can be measured by blade or the length measuring instrument that is equivalent to blade.
" the arc diameter measuring instrument that draws after on the principle of=2.000004466 these special trigonometric function values existing length measuring instrument being improved, it is simple in structure, and is easy to use, can directly read the circular arc external diameter because the utility model is to utilize tg63 ° 26 ' 06.
Fig. 1 is design concept figure of the present utility model;
Fig. 2 is a kind of embodiment synoptic diagram of the present utility model;
Fig. 3 is an another kind of embodiment synoptic diagram of the present utility model.
As shown in Figure 1, circular arc 6 is tangential on D, C, E point with the measurement plane 3 and the blade 1 of measuring jaw 2, according to how much laws as can be known, and CO=EO=arc radius R, and tg (α
2/ 2)=and tg63 ° 26 ' 06 "=CO/CB=R/CB, then R=CBtg63 ° 26 ' 06 ", "=2.000004466, if by 0.01 precision value, then " ≈ 2.00, then R=2CB=AB for tg63 ° 26 ' 06 can to find tg63 ° 26 ' 06 by table of trigonometric function; And AB just is the length that movable measuring jaw is pulled out from zero-bit (A point), so the reading on the slide calliper rule is circular arc 6 external radiuss.By above-mentioned principle as can be known, according to the restriction of required precision difference and process aspect, angle α 1, α 2 can be at 126 ° 52 ' 12 " about, but be preferably 126 ° 52 ' 12 ".
By the utility model design concept as can be known, as long as (α 1 to be in measuring jaw 2 measurement planes 3 in the same plane and the angle between the blade 1, α 2) remain on 126 ° 52 ' 12 " about; measurement plane 3 intersections of two measuring jaws 2 are the slide calliper rule zero-bit; then allow the measurement plane 3 of circular arc 6 to be measured and two measuring jaws 2 and blade 1 tangent when measuring, then the distance between the measurement plane 3 of two measuring jaws 2 and blade 1 joining is circular arc 6 external radiuss.Can certainly measure the relative displacement between two measurement planes 3 and draw the circular arc external radius.The blade 1 of measuring 2 relative displacements of two measuring jaws can be the blade of vernier caliper, the blade of digimatic calipers, also can be the blade of any length measuring instruments such as screw micrometer.
In embodiment shown in Figure 2, blade 1 is the blade of vernier caliper, and for easy to use, measuring jaw 2 is designed to fixedly a measuring jaw 2 and a movable measuring jaw 2, and fixedly measuring jaw 2 is installed in blade 1 front end, and its measurement plane 3 intersects at blade 1 zero-bit with blade 1; Movable measuring jaw 2 is installed on the vernier 4, and its measurement plane 3 intersects at vernier 4 front end terminations with blade 1.When two measuring jaws 2 closed up, the vernier caliper reading was zero; When circular arc to be measured is stuck between two measuring jaws 2, and respectively with the measurement plane 3 of two measuring jaws 2 and blade 1 when tangent, the reading on the vernier caliper is the radius of circular arc to be measured.
In embodiment shown in Figure 3, blade 1 is the blade of digimatic calipers, fixedly measuring jaw is installed in blade 1 front end with the form identical with preceding a kind of embodiment, and movable measuring jaw 2 also is installed on the capacitive grid numeral display device 5 with the form identical with preceding a kind of embodiment.
Except that above two kinds of embodiments; (α 1 for the angle of all measurement planes 3 with two measuring jaws 2 and blade 1; α 2) be located at 126 ° 52 ' 12 " about, measure the slide calliper rule of circular arc external diameter with the relative displacement of measuring two measuring jaws 2, all belong to the claimed scope of the utility model.
Claims (2)
1. direct-reading circular arc external diameter slide calliper rule, comprise blade and two measuring jaws, blade and two measuring jaws are in the same plane, it is characterized in that: the measurement plane (3) of measuring jaw (2) and the angle between the blade (1) (α 1, α 2) are about 126 ° 52 ' 12 ", and have at least a measuring jaw (2) to move with respect to another measuring jaw (2); Distance between the measurement plane (3) of two measuring jaws (2) and blade (1) joining can be measured by blade (1) or the length measuring instrument that is equivalent to blade (1).
2. a kind of direct-reading circular arc external diameter slide calliper rule according to claim 1, it is characterized in that: a measuring jaw (2) is installed in the front end of the blade (1) of vernier caliper or digimatic calipers, measurement plane (3) of this measuring jaw (2) and blade (1) intersect at the zero position of slide calliper rule, another measuring jaw (2) is fixed in the front end of vernier (4) or capacitive grid numeral display device (5), this activity measuring jaw (2) can together slide along blade (1) with vernier (4) or capacitive grid numeral display device (5), and its measurement plane (3) and blade (1) intersect at the front end termination of vernier (4) or capacitive grid numeral display device (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99231087 CN2370383Y (en) | 1999-03-03 | 1999-03-03 | Directly reading circular arc outer diameter callipers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99231087 CN2370383Y (en) | 1999-03-03 | 1999-03-03 | Directly reading circular arc outer diameter callipers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2370383Y true CN2370383Y (en) | 2000-03-22 |
Family
ID=34020020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99231087 Expired - Fee Related CN2370383Y (en) | 1999-03-03 | 1999-03-03 | Directly reading circular arc outer diameter callipers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2370383Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112763534A (en) * | 2020-12-16 | 2021-05-07 | 华电电力科学研究院有限公司 | Evaluation method of electronic digital display large-range long-life boiler heating surface creep expansion detection device |
-
1999
- 1999-03-03 CN CN 99231087 patent/CN2370383Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112763534A (en) * | 2020-12-16 | 2021-05-07 | 华电电力科学研究院有限公司 | Evaluation method of electronic digital display large-range long-life boiler heating surface creep expansion detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |