CN102759317A - Outer circular arc rule - Google Patents
Outer circular arc rule Download PDFInfo
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- CN102759317A CN102759317A CN2011101110274A CN201110111027A CN102759317A CN 102759317 A CN102759317 A CN 102759317A CN 2011101110274 A CN2011101110274 A CN 2011101110274A CN 201110111027 A CN201110111027 A CN 201110111027A CN 102759317 A CN102759317 A CN 102759317A
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- rule
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Abstract
The invention discloses an outer circular arc rule designed according to a right-angled triangle principle. The outer circular arc rule comprises a rule body, a rule frame and a fastening device; the rule frame is provided with a first rule foot, a second rule foot and a body; the first rule foot and the second rule foot are respectively fixedly connected with the body; an included angle between the first rule foot and the second rule foot is 60 degrees or 90 degrees; the body is provided with a sliding groove; the rule body is assembled with the sliding groove and slides along the sliding groove; the rule body is provided with main rule scales; the body is provided with sub rule scales; the zero scale position of a main rule is arranged at one end, far away from the body, of the main rule; and the zero scale position of a sub rule is an intersection point position between the first rule foot and the second rule foot. The outer circular arc rule disclosed by the invention has the characteristics of convenience for operation, simple structure, low cost and capability of detecting the radius of an arc of which the angle of circumference is less than 180 degrees and the radius of large objects.
Description
Technical field
The present invention relates to the survey instrument field, particularly relate to a kind of external arc chi.
Background technology
As everyone knows, carry out the measurement of object length, have different survey instruments according to the length of different objects, the bevel protractor that taken measurement of an angle, the pit gauge that fathomed, measuring height has height gauge.But, when measuring angle of circumference, do not have corresponding survey instrument at present less than the radius of 180 ° circular arc and tall and big object radius or diameter.
In real work, for above-mentioned situation, generally adopt following two kinds of methods: template method cooperates computing method with measuring.
Template method is to make the model of different circular arcs according to the different arcs radius, compares with radius gauge and the angle of circumference circular arc object less than 180 °.This method is verified the many and less circular arc object of radius size of circular arc object quantity owing to need to make radius gauge so only adapt to.
Measuring the cooperation computing method is according to arc geometric size calculation formula R=(C
2+ 4h
2)/8h calculates arc radius, and chord length (C) and two size numerical value of sagitta (h) of measuring object calculate again.To tall and big object, just can only measure circumference (L) size numerical value, calculate arc radius according to circular constant formula R=L/2 π.
One Chinese patent application 200810070341.0 discloses a kind of circle footpath chi; The principle of this circle footpath chi is to be upper base with the blade; Two chi pin are three limits of the isosceles trapezoid of waist; The angle of two chi pin is 60 °, and the blade stage casing is provided with telescopic slide rule, and the slide rule center line overlaps with the perpendicular bisector of blade.There is following shortcoming in dial scale according to this principle design:
1. owing to be isosceles trapezoid, the interference of blade is to less than the arc radius of certain size energy measurement not; To bigger arc radius because of blade too big and weight reason be inconvenient to use.
2. the angle of circumference to measured circular arc body is greater than 120 °, and promptly＞1/3 round, range of application is narrower.
3. actual arc radius value equals the regular length known numeric value and measures length numerical value composition.
Fast detect angle of circumference for ease less than the radius of 180 ° circular arc and tall and big object radius, enlarge the usable range of dial scale simultaneously, it is very necessary to solve the prior art deficiency to study a kind of external arc chi.
Summary of the invention
The objective of the invention is to avoid the weak point of prior art and a kind of external arc chi is provided, this external arc chi can detect angle of circumference less than the radius of 180 ° circular arc and tall and big object radius, and is easy to operate, simple in structure, with low cost.
The object of the invention is realized through following technical measures.
A kind of external arc chi of the present invention; Be provided with blade, chi frame; Said chi frame is provided with the first chi pin, second chi pin and the body, and the said first chi pin, the said second chi pin connect respectively at said body-fixed, and the included angle A between said first chi pin and the said second chi pin is set to 60 ° or 90 °; Said body is provided with sliding tray; Said blade is assemblied in said sliding tray and slides along said sliding tray, and said blade is provided with the main scale scale, and said body is provided with secondary chi scale; 0 scale position of said main scale be arranged at said main scale away from said body one end, the zero graduation line position of said secondary chi is the position of intersecting point of said first chi pin and the said second chi pin.
Above-mentioned single pin dial scale is provided with fastener, and said fastener is arranged at said body.
Above-mentioned fastener comprises slotted eye and the trip bolt that is arranged at said body, and said trip bolt is assemblied in said slotted eye.
A kind of external arc chi of the present invention; Be provided with blade, chi frame; Said chi frame is provided with the first chi pin, second chi pin and the body, and the said first chi pin, the said second chi pin connect respectively at said body-fixed, and the included angle A between said first chi pin and the said second chi pin is set to 60 ° or 90 °; Said body is provided with sliding tray; Said blade is assemblied in said sliding tray and slides along said sliding tray, and said blade is provided with the main scale scale, and said body is provided with secondary chi scale; 0 scale position of said main scale be arranged at said main scale away from said body one end, the zero graduation line position of said secondary chi is the position of intersecting point of said first chi pin and the said second chi pin.This external arc chi can detect angle of circumference less than the radius of 180 ° circular arc and tall and big object radius, and is easy to operate, simple in structure, with low cost.
Description of drawings
Utilize accompanying drawing that the present invention is further described, but the content in the accompanying drawing does not constitute any restriction of the present invention.
Fig. 1 is the structural representation of a kind of external arc chi of the present invention embodiment 1.
In Fig. 1, comprise:
Chi frame 200,
The first chi pin 210,
The second chi pin 220
Sliding tray 231,
Fastener 300.
Embodiment
In conjunction with following examples the present invention is further described.
embodiment 1.
A kind of external arc chi; As shown in Figure 1; Be provided with blade 100, chi frame 200; Chi frame 200 is provided with the first chi pin 210, the second chi pin 220 and body 230, the first chi pin 210, the second chi pin 220 is fixedly connected respectively at body 230, and the included angle A between the first chi pin 210 and the second chi pin 220 is set to 60 °.Included angle A between the first chi pin 210 and the said second chi pin 220 is set to 60 °, can directly pass through the radius of the reading of this external arc chi as survey circular arc object.Need not pass through other conversion, therefore easy to operate, measuring error is less.
This external arc chi is provided with fastener 300, and fastener 300 is arranged at body 230.After measurement finishes, can make measurement result remain unchanged through fastener 300, convenient other operation of cooperation.Fastener 300 comprises slotted eye and the trip bolt that is arranged at body 230, and trip bolt is assemblied in slotted eye.
This external arc chi; Its method of application is such; After the first chi pin 210 of chi frame 200 and the second chi pin 220 closed a certain cross section of measured circular arc object respectively, promote blade 100 and make blade 1000 scale ends and the applying of testee surface, tighten trip bolt then; Take out the external arc chi, read measured value according to the number reading method of vernier caliper.
External arc chi of the present invention; Its design is according to the circumcircle geometrical principle; Included angle A between the first chi pin 210 and the second chi pin 220 is set to 60 °; The radius of crossing first, second chi pin 220 and the point of contact of arc surface is vertical with the first chi pin 210, the second chi pin 220 respectively, and therefore, the reading of this external arc chi equals radius of a circle R.Therefore, through external arc chi of the present invention, can directly measure the radius of reading the measured circular arc body.
This external arc chi can detect angle of circumference less than the radius of 180 ° circular arc and tall and big object radius; As long as with fit the respectively a certain cross section of measured circular arc object of the first chi pin 210, the second chi pin 220; Promote blade 100 and slide into correct position along chute; Tighten fastener 300, reading is the radius of measured circular arc object.
Utilize the circumcircle geometrical principle, the pinch that is provided with between the first chi pin 210 and the second chi pin 220 is 60 °, therefore; The reading of this external arc chi is the radius of measured circular arc object, need not pass through other and handle or transform, therefore; Can reduce error, and simple in structure, with low cost.Direct reading mode, easy and simple to handle.
This external arc chi is designed to screw thread pair, and the rotation nut advances chi frame 200 or retreats, and can process the higher milscale of precision.
embodiment 2.
A kind of external arc chi, other structures are identical with embodiment 1, and difference is that the included angle A between the first chi pin 210 and the said second chi pin 220 is set to 90 °.
Should be noted that at last; Above embodiment is only in order to technical scheme of the present invention to be described but not to the restriction of protection domain of the present invention; Although the present invention has been done detailed description with reference to preferred embodiment; Those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention, and do not break away from the essence and the scope of technical scheme of the present invention.
Claims (3)
1. external arc chi; It is characterized in that: be provided with blade, chi frame; Said chi frame is provided with the first chi pin, second chi pin and the body, and the said first chi pin, the said second chi pin connect respectively at said body-fixed, and the included angle A between said first chi pin and the said second chi pin is set to 60 ° or 90 °; Said body is provided with sliding tray; Said blade is assemblied in said sliding tray and slides along said sliding tray, and said blade is provided with the main scale scale, and said body is provided with secondary chi scale; 0 scale position of said main scale be arranged at said main scale away from said body one end, the zero graduation line position of said secondary chi is the position of intersecting point of said first chi pin and the said second chi pin.
2. external arc chi according to claim 1 is characterized in that: be provided with fastener, said fastener is arranged at said body.
3. external arc chi according to claim 2 is characterized in that: said fastener comprises slotted eye and the trip bolt that is arranged at said body, and said trip bolt is assemblied in said slotted eye.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101110274A CN102759317A (en) | 2011-04-29 | 2011-04-29 | Outer circular arc rule |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101110274A CN102759317A (en) | 2011-04-29 | 2011-04-29 | Outer circular arc rule |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102759317A true CN102759317A (en) | 2012-10-31 |
Family
ID=47053863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101110274A Pending CN102759317A (en) | 2011-04-29 | 2011-04-29 | Outer circular arc rule |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102759317A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104422419A (en) * | 2013-08-23 | 2015-03-18 | 怀集登云汽配股份有限公司 | Outer diameter V-shaped measurement method and V-shaped gauge of valve retainer outer diameter |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86200469U (en) * | 1986-01-29 | 1986-10-01 | 西安交通大学 | Inverted y-type vernier |
| CN2047777U (en) * | 1989-05-24 | 1989-11-15 | 贺建成 | Forked radius-measuring instrument for cylinder |
| JPH08285504A (en) * | 1995-04-14 | 1996-11-01 | Toshiba Chem Corp | Outside diameter measuring device |
| CN1633580A (en) * | 2002-02-18 | 2005-06-29 | 奥德·V·莫尔曼 | Tool for measuring the diameter of a body with polygonal or circular cross section |
| CN2708240Y (en) * | 2004-05-25 | 2005-07-06 | 广东省高级技工学校 | An arc radius measuring instrument |
| CN2729640Y (en) * | 2003-09-11 | 2005-09-28 | 瞿宏伟 | Sine calibrating gauge |
| CN2747538Y (en) * | 2004-08-23 | 2005-12-21 | 桂林广陆数字测控股份有限公司 | Are semidiameter direct reading out type electronic digital display micrometer calipers |
| CN101387488A (en) * | 2008-09-19 | 2009-03-18 | 王启明 | Round radial ruler |
| CN202074919U (en) * | 2011-04-29 | 2011-12-14 | 东莞信易电热机械有限公司 | External circular-arc rule |
-
2011
- 2011-04-29 CN CN2011101110274A patent/CN102759317A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86200469U (en) * | 1986-01-29 | 1986-10-01 | 西安交通大学 | Inverted y-type vernier |
| CN2047777U (en) * | 1989-05-24 | 1989-11-15 | 贺建成 | Forked radius-measuring instrument for cylinder |
| JPH08285504A (en) * | 1995-04-14 | 1996-11-01 | Toshiba Chem Corp | Outside diameter measuring device |
| CN1633580A (en) * | 2002-02-18 | 2005-06-29 | 奥德·V·莫尔曼 | Tool for measuring the diameter of a body with polygonal or circular cross section |
| CN2729640Y (en) * | 2003-09-11 | 2005-09-28 | 瞿宏伟 | Sine calibrating gauge |
| CN2708240Y (en) * | 2004-05-25 | 2005-07-06 | 广东省高级技工学校 | An arc radius measuring instrument |
| CN2747538Y (en) * | 2004-08-23 | 2005-12-21 | 桂林广陆数字测控股份有限公司 | Are semidiameter direct reading out type electronic digital display micrometer calipers |
| CN101387488A (en) * | 2008-09-19 | 2009-03-18 | 王启明 | Round radial ruler |
| CN202074919U (en) * | 2011-04-29 | 2011-12-14 | 东莞信易电热机械有限公司 | External circular-arc rule |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104422419A (en) * | 2013-08-23 | 2015-03-18 | 怀集登云汽配股份有限公司 | Outer diameter V-shaped measurement method and V-shaped gauge of valve retainer outer diameter |
| CN104422419B (en) * | 2013-08-23 | 2018-01-12 | 怀集登云汽配股份有限公司 | A kind of V-arrangement measuring method of external diameter and the V-arrangement cubing of Valve Disc external diameter |
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Application publication date: 20121031 |