CN102401623A - Outer diameter measuring ruler - Google Patents

Outer diameter measuring ruler Download PDF

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Publication number
CN102401623A
CN102401623A CN2011100417533A CN201110041753A CN102401623A CN 102401623 A CN102401623 A CN 102401623A CN 2011100417533 A CN2011100417533 A CN 2011100417533A CN 201110041753 A CN201110041753 A CN 201110041753A CN 102401623 A CN102401623 A CN 102401623A
Authority
CN
China
Prior art keywords
diameter measuring
outside diameter
scale
inverted
hypotenuse
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2011100417533A
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Chinese (zh)
Inventor
汪砚秋
Original Assignee
汪砚秋
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 汪砚秋 filed Critical 汪砚秋
Priority to CN2011100417533A priority Critical patent/CN102401623A/en
Publication of CN102401623A publication Critical patent/CN102401623A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a simple and convenient outer diameter measuring ruler which is shaped like an isosceles U shape with a downward opening, wherein the isosceles U shape is narrow in the upper and is wide in the lower, a vernier capable of moving up and down is arranged on a ruler body, and an alignment line is arranged on the vernier. The outer diameter measuring ruler makes use of the characteristic that the waist width changes along with the isosceles trapezoid which changes along the waist height, in measurement, the measuring ruler is inserted into a circular object to be measured, the lower edge of the vernier and the inner side of the ruler body are led to be in contact with the outer edge of the circular object to be measured, and the measurement data can be read according to the scale corresponding to the alignment line on the veriner. Any requirements on measurement precision can be met by the angle change of the isosceles trapezoid, but the measurement interval of the measuring ruler is shortened, and the requirement on large measurement interval can be met by a group of measuring rulers.

Description

The outside diameter measuring chi
[technical field]
The present invention relates to a kind of yardstick survey instrument, especially portable outside diameter measuring instrument.
[background technology]
Existing outside diameter measuring instrument has multiple survey instruments such as clamp, vernier caliper, milscale, and there are perfect places of needs such as measurement of factor or reading of data be not convenient respectively in these survey instruments.
[summary of the invention]
The purpose of this invention is to provide that a kind of making is simple, degree of accuracy is high, reading of data outside diameter measuring instrument easily.
For realizing above-mentioned purpose, outside diameter measuring chi of the present invention is made up of the inverted U-shaped plane blade 1 and the vernier scale 2 that can slide up and down.The inner edge of U-shaped blade is symmetrical isosceles hypotenuse, and the hypotenuse gradient is decided according to measuring accuracy, and the more little measuring accuracy of gradient is high more, can reach any precision of actual needs in theory.But along with the raising of measuring accuracy, samely can reduce chi between measurement zone, the dip stick that available one group of gradient is identical satisfies the requirement that increases between measurement zone.At the interior hypotenuse place difference level delineation scale mark near chi, its scale value calculates according to correlation formula.Tow sides at chi all have scale mark, and positive is circle outside diameter measuring scale mark, and reverse side is that flat face is measured scale mark, the delineation of scale mark average level, and the scale value left-right symmetric equates.
Be inserted in outside diameter measuring chi vertical sleeve on the tested circular piece; Tested circular piece external diameter is touched with blade left and right sides inner edge mutually; The slip vernier scale makes its lower edge touch mutually with tested circular piece peak, at this moment; In the front of chi, the pairing scale value of vernier scale directrix is exactly the outside dimension of this tested circular piece.
Be inserted in outside diameter measuring chi vertical sleeve on the tested straight member, make tested straight member touch the slip vernier scale mutually with blade left and right sides inner edge; Its lower edge is touched with tested straight member top mutually; At this moment, at the reverse side of chi, the pairing scale value of vernier scale directrix is exactly the size of this tested straight member.
If U-shaped chi under shed width is W, the angle of hypotenuse is d in the blade, and the vernier scale directrix is A apart from the vernier lower edge, and measured value scale mark carpenters square end opening height is H, then has:
The computing formula of measuring the scale value of circle external diameter is :=(W*sin (d)-2*cos (d) * (H-A))/(1-cos (d))
The computing formula of measuring the scale value of straight member is :=W-2* (H-A)/tg (d)
[description of drawings]
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed explanation.Wherein:
Fig. 1 is the front view (FV) that outside diameter measuring chi of the present invention is measured the circle external diameter.
Fig. 2 is the front view (FV) that outside diameter measuring chi of the present invention is measured straight member.
[embodiment]
Front view (FV) when measuring the circle external diameter shown in Figure 1 for the outside diameter measuring chi.During measurement, be inserted in outside diameter measuring chi vertical sleeve on the tested circular piece, tested circular piece external diameter is touched with blade left and right sides inner edge mutually; The slip vernier scale; Its lower edge is touched with tested circular piece peak mutually, and at this moment, the pairing scale value of vernier scale directrix is exactly the outside dimension of this tested circular piece.
Front view (FV) when measuring straight member shown in Figure 2 for the outside diameter measuring chi.During measurement, be inserted in outside diameter measuring chi vertical sleeve on the tested straight member, tested straight member is touched with blade left and right sides inner edge mutually; The slip vernier scale; Its lower edge is touched with tested straight member top mutually, and at this moment, the pairing scale value of vernier scale directrix is exactly the size of this tested straight member.

Claims (5)

1. outside diameter measuring chi; Utilize the hypotenuse characteristic; Be made up of inverted U-shaped blade (1) and vernier scale (2), it is characterized in that: the inner edge of inverted U-shaped blade (1) is symmetrical isosceles hypotenuse, and the hypotenuse gradient is decided according to measuring accuracy; The more little measuring accuracy of gradient is high more, can reach any precision of actual needs in theory.Two sides and both sides at blade have scale mark respectively, and its scale value calculates according to correlation formula.Positive is circle outside diameter measuring scale mark, and reverse side is that flat face is measured scale mark, the delineation of scale mark average level, and the scale value left-right symmetric equates.Vernier scale (2) can slide up and down along inverted U-shaped blade.The implication of letter does in its following formula
2. outside diameter measuring chi according to claim 1 is characterized in that: utilize the characteristic of hypotenuse, change gradient, can satisfy the measurement demand of different accuracy requirement.
3. outside diameter measuring chi according to claim 1 is characterized in that: the inner edge of inverted U-shaped blade (1) is symmetrical isosceles hypotenuse.
4. outside diameter measuring chi according to claim 1 is characterized in that: inverted U-shaped blade (1) is gone up the scale value of surveying external diameter and is calculated according to formula (W*sin (d)-2*cos (d) * (H-A))/(1-cos (d)).
5. outside diameter measuring chi according to claim 1 is characterized in that: the scale value that inverted U-shaped blade (1) is gone up the lining straight flange calculates according to formula W-2* (H-A)/tg (d).
CN2011100417533A 2011-02-22 2011-02-22 Outer diameter measuring ruler Pending CN102401623A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011100417533A CN102401623A (en) 2011-02-22 2011-02-22 Outer diameter measuring ruler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011100417533A CN102401623A (en) 2011-02-22 2011-02-22 Outer diameter measuring ruler

Publications (1)

Publication Number Publication Date
CN102401623A true CN102401623A (en) 2012-04-04

Family

ID=45884076

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011100417533A Pending CN102401623A (en) 2011-02-22 2011-02-22 Outer diameter measuring ruler

Country Status (1)

Country Link
CN (1) CN102401623A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102735132A (en) * 2012-06-28 2012-10-17 苏州勤美达精密机械有限公司 Multifunctional inspection device set
CN105865305A (en) * 2016-05-31 2016-08-17 芜湖卓越空调零部件有限公司 Outer diameter caliper gauge for upper shell of liquid accumulator
CN109556477A (en) * 2017-09-26 2019-04-02 张小正 The multipurpose tools such as the detectable building pre-embedded bolt size of one kind, fastening nut

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53142362U (en) * 1977-04-15 1978-11-10
CN2036653U (en) * 1988-10-25 1989-04-26 北京理工大学 Callipers for internal- and external diameter measurements

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53142362U (en) * 1977-04-15 1978-11-10
CN2036653U (en) * 1988-10-25 1989-04-26 北京理工大学 Callipers for internal- and external diameter measurements

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102735132A (en) * 2012-06-28 2012-10-17 苏州勤美达精密机械有限公司 Multifunctional inspection device set
CN102735132B (en) * 2012-06-28 2014-12-24 苏州勤美达精密机械有限公司 Multifunctional inspection device set
CN105865305A (en) * 2016-05-31 2016-08-17 芜湖卓越空调零部件有限公司 Outer diameter caliper gauge for upper shell of liquid accumulator
CN105865305B (en) * 2016-05-31 2020-11-17 浙江巨海工具厂 Outer diameter caliper gauge for upper shell of liquid accumulator
CN109556477A (en) * 2017-09-26 2019-04-02 张小正 The multipurpose tools such as the detectable building pre-embedded bolt size of one kind, fastening nut

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Application publication date: 20120404