CN101650150A - Measuring unit of portable general major-diameter measuring gauge - Google Patents
Measuring unit of portable general major-diameter measuring gauge Download PDFInfo
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- CN101650150A CN101650150A CN200910035213A CN200910035213A CN101650150A CN 101650150 A CN101650150 A CN 101650150A CN 200910035213 A CN200910035213 A CN 200910035213A CN 200910035213 A CN200910035213 A CN 200910035213A CN 101650150 A CN101650150 A CN 101650150A
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Abstract
The invention discloses a measuring unit of a portable general major-diameter measuring gauge, comprising a body, a first locating column and a second locating column, and a first fixing mechanism anda second fixing mechanism, which are connected at two ends of the body, wherein the outer side surfaces of the first locating column and the second locating column are cylindrical surfaces; the measuring unit is characterized in that: the first fixing mechanism is arranged on the first locating column and the second fixing mechanism is arranged on the second locating column. The first fixing mechanism and the second fixing mechanism are respectively arranged on the first locating column and the second locating column, thereby avoiding flexural deformation of the body caused by fixing force, effectively improving the measuring precision and simplifying the structure.
Description
Technical field
The invention provides a kind of measuring unit of portable general major-diameter measuring gauge, be used for large diameter high-acruracy survey, belong to the length measurement technique field.
Background technology
Large diameter measurement is a relatively problem of difficulty all the time, and Chinese patent (patent No. 96117113.8 and application number 200710024997.4) and United States Patent (USP) (patent No. 6330753B1) have been described a kind of portable general major-diameter measuring gauge and measuring method thereof.This measuring gage is made up of a series of separate measuring units and a device or an annex of measuring so-called sealing size, and wherein each measuring unit comprises setting element that a body, two lay respectively at the body two ends, some fixed mechanisms that is positioned at the built-in permanent magnet on the body and some auxiliary positioning mechanism.When measuring major diameter, successively with each measuring unit head to tail or the tail enemy puts and be fixed on the measured circle perimeter surface by fixed mechanism, up to remaining insufficient space in accommodating another measuring unit (round-robin method).Also can adopt a small amount of measuring unit alternately to put (alternative method).Measure the distance between first measuring unit and last measuring unit, can calculate tested circle diameter according to geometric relationship.
Adopt portable general major-diameter measuring gauge to measure major diameter to have no maximum, simple structure, easily demarcate, low cost, and characteristics such as high precision.Yet, because fixed mechanism is positioned on the measuring unit body, the balance reacting force that magnetic force that it produced and testee act on the setting element will produce moment of flexure and make it to produce corresponding flexural deformation the measuring unit body, cause measuring unit length to change, and then reduce measuring accuracy.When measuring unit length was big, this was a key factor of restriction measuring accuracy.One of solution to this problem is the distance that reduces as far as possible between setting element and the fixed mechanism, and this structurally must the restricted and limit; The another one method such as Chinese patent (application number 200710024997.4) proposition, some aiding supports mechanism is set on the measuring unit body, but can makes operation become loaded down with trivial details so again, it is complicated that mechanism becomes.
Summary of the invention
Problem at above-mentioned portable general major-diameter measuring gauge measuring unit existence, the invention provides and a kind ofly can avoid bed knife that fixed mechanism produces that the measuring unit body is produced moment of flexure and flexural deformation, thereby improve the measuring unit of the portable general major-diameter measuring gauge of measuring accuracy.
The present invention adopts following technical scheme:
A kind of measuring unit of portable general major-diameter measuring gauge, comprise: body, first reference column that is connected in the body two ends and second reference column and first fixed mechanism and second fixed mechanism, wherein the lateral surface of first reference column and second reference column is the face of cylinder, first fixed mechanism is located on first reference column, and second fixed mechanism is located on second reference column.
The method of measurement diameter as shown in Figure 1, headed by measuring unit first reference column, second reference column is a tail, a series of measuring units are first successively, tail joins and the bed knife that produced by first fixed mechanism and second fixed mechanism respectively is fixed on the testee circumferential surface, adopt the device of measuring distance between cylinder and the cylinder to measure head, distance on the tail measuring unit between adjacent first reference column and second positioning cylinder, this distance is first, gap on the tail measuring unit between adjacent first reference column and second positioning cylinder, or the centre distance between them, or certain specific range between them, according to this distance, first reference column and second positioning cylinder are each other on all measuring units, and formed geometric relationship between they and the testee circumferential surface, can obtain testee circumferential surface diameter.Obviously, as long as the measuring unit of sufficient amount is arranged, big diameter can be measured arbitrarily.For saving measuring unit quantity, also can adopt a small amount of measuring unit to finish measurement.For example adopt three measuring units, method of operating is: earlier three measuring units are located and are fixed on the testee circumferential surface by preceding method, taking out second measuring unit then is placed on after the 3rd measuring unit, the 3rd measuring unit is placed on after second measuring unit again, by that analogy, up to the distance between one of them measuring unit and first measuring unit within the measurement range of the device of distance between aforementioned measurement cylinder and the cylinder.At last, shown in the figure situation when measuring external diameter, can measure internal diameter with quadrat method.
More than as seen, as shown in the figure, because first fixed mechanism and second fixed mechanism lay respectively on first reference column and second reference column, the magnetic force that it produced and act on the balance reacting force on first reference column and act on balance reacting force conllinear on second reference column with testee respectively, thereby can not produce moment of flexure and make it to produce flexural deformation, thereby reach the purpose that improves measuring accuracy to the measuring unit body.Moreover, because have only first fixed mechanism and two fixed mechanisms of second fixed mechanism, do not need aiding support mechanism, this method also has characteristics simple in structure and easy and simple to handle with respect to prior art is measured the method and apparatus that is proposed at diameters for.
Description of drawings
Fig. 1 adopts the present invention to measure external diameter principle and the stressed synoptic diagram of measuring unit, and the device of wherein measuring distance between cylinder and the cylinder does not draw;
Fig. 2 is an examples measure cellular construction front elevation when measuring external diameter;
Fig. 3 is Fig. 2 measuring unit vertical view;
Fig. 4 is Fig. 2 measuring unit A-A amplification view;
Fig. 5 is Fig. 2 measuring unit B-B amplification view;
Fig. 6 is an examples measure cellular construction front elevation when measuring internal diameter;
Fig. 7 is Fig. 6 measuring unit C-C amplification view.
Among the figure: 0-testee circumferential surface; The 1-measuring unit; 11-first reference column; First cavity in 111-first reference column 11; Screw in 112-first cavity 111; 12-second reference column; Second cavity in 121-second reference column 12; Screw in 122-second cavity 121; The 13-body; 14-first fixed mechanism; 141-first permanent magnet; 142-first screw rod; 143-first knob; 15-second fixed mechanism; 151-second permanent magnet; 152-second screw rod; 153-second knob; The magnetic force that first permanent magnet 141 is produced in F1-first fixed mechanism 14; The magnetic force that second permanent magnet 151 is produced in F2-second fixed mechanism 15; The R1-testee acts on the balance reacting force of first reference column 11; The R2-testee acts on the balance reacting force of second reference column 12.
Embodiment
As Fig. 2, Fig. 3 and shown in Figure 6, a kind of measuring unit 1 embodiment of portable general major-diameter measuring gauge, comprise: body 13, first reference column 11 that is connected in body 13 two ends and second reference column 12 and first fixed mechanism 14 and second fixed mechanism 15, wherein the lateral surface of first reference column 11 and second reference column 12 is the face of cylinder, first fixed mechanism 14 is located on first reference column 11, and second fixed mechanism 15 is located on second reference column 12.
In the present embodiment, as shown in Figure 4, in first reference column 11, be provided with first cavity 111, first fixed mechanism 14 is located in first cavity 111, comprise first permanent magnet 141, first screw rod 142 and first knob 143, first screw rod 142 is threaded with screw 112 in first cavity 111, and an end of first screw rod 142 is connected with first permanent magnet 141, and the other end is connected with first knob 143.
In the present embodiment, as Fig. 5 and shown in Figure 7, in second reference column 12, be provided with second cavity 121, second fixed mechanism 15 is located in second cavity 121, comprise second permanent magnet 151, second screw rod 152 and second knob 153, second screw rod 152 is threaded with screw 122 in second cavity 121, and an end of second screw rod 152 is connected with second permanent magnet 151, and the other end is connected with second knob 153.
When rotating first knob 143 and second knob 153, synchronously first permanent magnet 141 of rotation and second permanent magnet 151 be near having ferromagnetic testee circumferential surface 0, thereby produce the magnetic force that enough measuring unit 1 is fixed on the testee circumferential surface 0 between measuring unit 1 and testee circumferential surface 0.
If testee does not have ferromagnetism, as stainless steel or brass etc., the first above-mentioned fixed mechanism 14 and second fixed mechanism 15 can also adopt other multiplely to know embodiment altogether, for example: first fixed mechanism 14 and second fixed mechanism 15 can adopt glue, measuring unit is fixed on the testee, certainly, first fixed mechanism 14 and second fixed mechanism 15 also can adopt negative pressure device that measuring unit is absorbed and fixed on the testee.
To measure external diameter is example, and the method that adopts examples measure unit 1 to measure diameter is described.As shown in Figure 1, headed by measuring unit 1 first reference column 11, second reference column 12 is a tail, a series of measuring units 1 with structure shown in Figure 2 are first successively, tail joins and the magnetic force that produced by first fixed mechanism 14 and second fixed mechanism 15 respectively is fixed on the testee circumferential surface 0, adopt the device of measuring distance between cylinder and the cylinder to measure head as a common micrometer inside caliper, gap on the tail measuring unit 1 between adjacent first reference column 11 and second positioning cylinder 12, according to this gap, first reference column 11 and second positioning cylinder 12 are each other on all measuring units 1, and formed geometric relationship between they and the testee circumferential surface 0, can obtain testee circumferential surface 0 diameter.Obviously, as long as the measuring unit 1 of sufficient amount is arranged, big diameter can be measured arbitrarily.For saving measuring unit 1 quantity, also can adopt a small amount of measuring unit 1 to finish measurement.For example adopt three measuring units 1, method of operating is: earlier three measuring units 1 are located and are fixed on the testee circumferential surface 0 by preceding method, taking out second measuring unit 1 then is placed on after the 3rd measuring unit 1, the 3rd measuring unit 1 is placed on after second measuring unit 1 again, by that analogy, up to the gap between one of them measuring unit 1 and first measuring unit 1 within the measurement range of device as a common micrometer inside caliper of distance between aforementioned measurement cylinder and the cylinder.
Adopt a series of measuring units 1, can measure internal diameter with quadrat method with structure shown in Figure 6.
Claims (3)
1. the measuring unit of a portable general major-diameter measuring gauge, comprise: a body (13), first reference column (11) that is connected in body (13) two ends and second reference column (12) and first fixed mechanism (14) and second fixed mechanism (15), the lateral surface of described first reference column (11) and second reference column (12) is the face of cylinder, it is characterized in that, first fixed mechanism (14) is located on first reference column (11), and second fixed mechanism (15) is located on second reference column (12).
2. the measuring unit of portable general major-diameter measuring gauge according to claim 1, it is characterized in that, in first reference column (11), be provided with first cavity (111), first fixed mechanism (14) is located in first cavity (111), described first fixed mechanism (14) comprises first permanent magnet (141) and first screw rod (142), first screw rod (142) is threaded with first reference column (11), and first permanent magnet (141) is connected with an end of described first screw rod (142).
3. the measuring unit of portable general major-diameter measuring gauge according to claim 1, it is characterized in that, in second reference column (12), be provided with second cavity (121), second fixed mechanism (15) is located in second cavity (121), described second fixed mechanism (15) comprises second permanent magnet (151) and second screw rod (152), second screw rod (152) is threaded with second reference column (11), and second permanent magnet (151) is connected with an end of described second screw rod (152).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100352137A CN101650150B (en) | 2009-09-15 | 2009-09-15 | Measuring unit of portable general major-diameter measuring gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100352137A CN101650150B (en) | 2009-09-15 | 2009-09-15 | Measuring unit of portable general major-diameter measuring gauge |
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| Publication Number | Publication Date |
|---|---|
| CN101650150A true CN101650150A (en) | 2010-02-17 |
| CN101650150B CN101650150B (en) | 2012-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100352137A Expired - Fee Related CN101650150B (en) | 2009-09-15 | 2009-09-15 | Measuring unit of portable general major-diameter measuring gauge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278931A (en) * | 2010-12-10 | 2011-12-14 | 东南大学 | Device and method for measuring pitch diameter of extra-large straight thread with high precision in upper-limit-free way |
| CN102679843A (en) * | 2012-03-30 | 2012-09-19 | 东南大学 | Non-full-circle pi ruler for measuring major outside diameter |
-
2009
- 2009-09-15 CN CN2009100352137A patent/CN101650150B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278931A (en) * | 2010-12-10 | 2011-12-14 | 东南大学 | Device and method for measuring pitch diameter of extra-large straight thread with high precision in upper-limit-free way |
| CN102278931B (en) * | 2010-12-10 | 2014-11-26 | 东南大学 | Device and method for measuring pitch diameter of extra-large straight thread with high precision in upper-limit-free way |
| CN102679843A (en) * | 2012-03-30 | 2012-09-19 | 东南大学 | Non-full-circle pi ruler for measuring major outside diameter |
| CN102679843B (en) * | 2012-03-30 | 2014-11-19 | 东南大学 | Non-full-circle pi ruler for measuring major outside diameter |
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| Publication number | Publication date |
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| CN101650150B (en) | 2012-05-23 |
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