CN103884256A - Diameter measurement ruler - Google Patents
Diameter measurement ruler Download PDFInfo
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- CN103884256A CN103884256A CN201410130010.7A CN201410130010A CN103884256A CN 103884256 A CN103884256 A CN 103884256A CN 201410130010 A CN201410130010 A CN 201410130010A CN 103884256 A CN103884256 A CN 103884256A
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- vernier
- chi
- claw
- chi body
- ruler
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Abstract
The invention provides a diameter measurement ruler which is high in measurement accuracy and wide in measurement range. The diameter measurement ruler comprises a ruler body, a movable ruler and a vernier, wherein the movable ruler is arranged inside the ruler body or on the ruler body and is parallel with the ruler body, the vernier is arranged on the ruler body and can slide in the length direction of the ruler body, scales are arranged on the ruler body, the vernier and the movable ruler are connected in the mode that the vernier and the movable ruler can move synchronously, a diameter measurement component is arranged at the tail end of the ruler body, the diameter measurement component is provided with an installation block connected to the tail end of the ruler body, claws are arranged at two sides of the installation block respectively, the claws and the movable ruler are located on the same plane, the two claws are symmetrically distributed with the movable ruler as the center and are parallel with each other, the distance between the two claws is preset, and the length of each claw is preset. Through the matching of diameter measurement blocks and the movable ruler, the diameter measurement ruler can accurately measure the diameter of a workpiece to be measured, is high in measurement accuracy, can measure both the outer diameter and the inner diameter of the workpiece, and is wide in measurement range.
Description
Technical field
The present invention relates to a kind of survey instrument, the especially a kind of caliber square that can fast, accurately measure diameter.
Background technology
The conventional measurer for measuring workpieces diameter is mainly vernier caliper or milscale, but these two kinds of measurers are all directly to block diameter to measure, cause its measurement range to have significant limitation, for the larger circle of diameter or spherical work-piece, or be less than sphere or the arc-shaped work of semicircle, need to measure by other measurers.
Chinese utility model patent ZL92234699.2 discloses a kind of close angle board, linked together by rotating shaft by rule and chi frid, can free-open-close, and be connected to determine angle square angle with pilot hole with dibit pin, utilize mathematical sine and cosine theorem Quick Measuring to go out the diameter of workpiece, the diameter value that this close angle board measures is the scale value on the rule that measured circle is corresponding with the point of contact of rule.In theory, this point of contact only has one, but in actual measurement process, and the position at this point of contact is also not easy to determine, touching of rule and measured workpiece may not be an a point but line segment or multiple contact point are difficult to obtain accurate measured value.
Chinese utility model patent ZL03248766.5 discloses a kind of sine calibrating gauge, by " bifurcation " shape chi body, slide block and form with the feeler lever that slide block disjunctor slides simultaneously, it is 60 ° that chi body two blocks sufficient interior angle, according to " 30 ° of angles right-angle side is all equaled to the half of hypotenuse " this theorem on mathematics, directly the scale from chi body is read tested diameter of a circle.If but use this caliber square to remove to measure the workpiece that diameter is larger, need to the specification of two card foots be done greatlyr, there is no practicality.
Chinese invention patent ZL92105826.8 discloses a kind of diameter measuring gauge and has calibrated method, and its diameter measuring gauge forms by supervising chi wall, blade, moving chi, digital display meter and handle, by the mathematical theorem measuring workpieces diameter of " determining a circle at 3 ".But the external diameter that this diameter measuring gauge can only measuring workpieces, internal diameter that cannot measuring workpieces, still has limitation.
Summary of the invention
The object of the present invention is to provide the caliber square that a kind of measuring accuracy is high, measurement range is wide and easy to use.
To achieve these goals, the present invention adopts following technical scheme:
A kind of caliber square, comprise chi body, be arranged in described chi body or described chi body on and the moving chi parallel with described chi body and be arranged on described chi body and the vernier that can slide along the length direction of described chi body, described chi body is marked with scale, described vernier with described moving chi can synchronization-moving mode being connected, the tail end of described chi body is provided with calibrates parts, calibrate the mounting blocks that parts have the tail end that is connected in described chi body, described mounting blocks both sides are respectively arranged with claw, described claw and described moving chi are positioned at same plane, and two claws are symmetrical centered by described moving chi, two claws are parallel to each other simultaneously, and its distance is predefined, the length of described claw is also predefined.
As a modification of the present invention, described claw is rectangular-shaped claw, pin mark shape claw or cutter shape claw.
As a modification of the present invention, on described chi body, be carved with diameter scale and/or length scale.
As a modification of the present invention, on described vernier, be provided with trip bolt.
As a modification of the present invention, on described vernier, be provided with digital display device.
As a modification of the present invention, described in to calibrate between piece and described chi body be to removably connect.
As a modification of the present invention, described chi body, described moving chi and described vernier are respectively the chi body on vernier caliper, moving chi and vernier.On the basis of existing vernier caliper, be modified into caliber square of the present invention in conjunction with the present invention.
Adopt after technique scheme, by calibrating the cooperation of piece and moving chi, then according to the mathematical formulae of deriving
the diameter that can measure accurately or calculate measured workpiece, measuring accuracy is high, in above-mentioned formula, the diameter that φ is measured workpiece, the length that m is claw, x is the displacement before and after chi measurement, L is the distance between two claws.As long as because two claws calibrating on piece are connected on the circular arc of measured workpiece, to the not requirement of the radian of circular arc, can measure the diameter that many vernier calipers cannot be measured, external diameter that not only can measuring workpieces, also internal diameter that can measuring workpieces, measurement range is large, uses also more for convenience.
Calibrate piece to be arranged to dismountable benefit be to make it go for the workpiece that diameter is less of the present invention.By the piece of calibrating of the present invention being installed at existing vernier caliper afterbody, in the time that measured workpiece diameter is larger, be suitable for and calibrate piece and measure, hour original claw of applicable vernier caliper is measured, and caliber square of the present invention can be applicable to the workpiece that diameter is less equally.
In addition, can also be by DDI diameter scale on chi body, person easy to use directly reads diameter measurement value, by trip bolt is set on vernier, convenient fixing slider position, by digital display device is set on vernier, makes to measure numerical value and reads more convenient.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention 1 caliber square;
The schematic diagram that Fig. 2 is caliber square of the present invention when measuring external diameter;
The schematic diagram that Fig. 3 is caliber square of the present invention when measuring internal diameter;
Fig. 4 calibrates block-shaped schematic diagram in the embodiment of the present invention 2;
Fig. 5 is for measuring the block-shaped schematic diagram of calibrating of external diameter in the embodiment of the present invention 3;
Fig. 6 is for measuring the block-shaped schematic diagram of calibrating of internal diameter in the embodiment of the present invention 3.
In figure, indicate corresponding as follows:
1-chi body; 2-moves chi;
3-vernier; 31-trip bolt;
32-digital display device; 4-calibrates parts;
41-claw; 42-mounting blocks;
5-screw.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described further.
Embodiment 1:
The caliber square structure of the present embodiment as shown in Figure 1, comprise chi body 1, be arranged on interior and parallel with the chi body 1 moving chi 2 of chi body 1 and be arranged on chi body 1 and the vernier 3 that can slide along the length direction of chi body 1, moving chi 2 also can be arranged on the interlayer of chi body 1 according to actual needs, back or side, one end of moving chi 2 with vernier 3 can synchronization-moving mode being connected, the other end is unsettled, moving chi 2 can be selected as required with the concrete on-link mode (OLM) of vernier 3, as adopt fixed link, also can be directly vernier 3 and moving chi 2 be directly designed to integral type, moving chi 2 also can slide along the length direction of chi body 1.On vernier 3, be also provided with trip bolt 31 and the digital display device 32 that can directly show vernier 3 present position scale values for fixing vernier 3 positions.The tail end of chi body 1 is provided with calibrates parts 4, calibrating parts 4 can be non-disconnectable with the connected mode of chi body 1, but preferably detachable, so that can change various different sizes calibrates parts 4, in the present embodiment, calibrate parts 4 and be connected on chi body 1 by screw 5, screw 5 can repeated disassembled and assembled.Calibrate the mounting blocks 42 that parts 4 have the tail end that is connected in described chi body, its both sides are provided with claw 41, claw 41 is positioned at same plane with moving chi 2, simultaneously claw 41 is symmetrical to move centered by chi 2, moving chi 2 is positioned at the centre of two claws 41, its length is predefined, the claw 41 of calibrating parts 4 both sides is parallel to each other, and its distance is predefined, it should be noted that, distance definition between two claws 41 is as follows: in the time that two claws 41 are stuck on circular arc, distance between two contact points that two claws 41 and circular arc contact is the distance between two claws 41.Caliber square is in the time measuring external diameter and measure internal diameter, and due to the contact point difference of claw 41 on circular arc, its predefined distance is different.In the present embodiment, mounting blocks 42 is rectangular-shaped mounting blocks, and claw 41 is rectangular-shaped claw, and as shown in Figure 1, A-A face is the surface of contact between mounting blocks 42 and claw 41, is also the base plane of claw 41.The distance presetting between two claws 41 is L, and the length that simultaneously presets claw 41 is m.On chi body 1, be carved with length scale and diameter scale, on vernier 3, be also carved with length scale.In the present embodiment, diameter scale also should separately indicate external diameter scale and internal diameter scale.In original state, the zero graduation line on vernier 3 is positioned at the zero graduation position of length scale on chi body 1, and the end face of moving chi 2 unsettled one end flushes with the base plane of claw 41, is positioned at the A-A face shown in Fig. 1.In order to express easily, represent the displacement of vernier 3 with respect to zero graduation position on chi body 1, the length scale value on the chi body 1 that vernier 3 points to x.Because vernier 3 is fixedly connected with moving chi 2, x is also the displacement before and after chi measurement, and the scale value of diameter scale is according to formula
demarcate.When use, the diameter scale that the zero graduation line on vernier 3 points to is the diameter of measured workpiece.Between length scale on chi body 1 and vernier 3, relation is identical with general vernier caliper with reading mode, no longer describes in detail herein.
When the caliber square of the present embodiment is used for measuring external diameter, its principle as shown in Figure 2, suppose that fan-shaped OEF is measured workpiece, its diameter is φ, radius is R, be φ=2R, point O is its center of circle, arc EF is its arc section, line segment AM and line segment BN represent respectively the length of two claws 41, be AM=BN=m, point M and some N are the contact point of claw and arc EF, line segment MN is the distance between two claws 41, be MN=L, line segment AB represents the base plane of claw 41, it is the A-A face shown in Fig. 1, suppose that straight line CG is for moving chi 2, point G is on arc EF, straight line CG and line segment MN intersect at D, line segment AM and line segment BN are symmetrical centered by straight line CG, and be parallel to each other.Line segment CG is the displacement that chi 2 is measured front and back, i.e. CG=x.Due to a M and some N on arc EF, known according to geometrically round perpendicular bisector principle, point O is on straight line CG, due to line segment AM and line segment BN centered by straight line CG symmetrically, and be parallel to each other, and AM=BN=m, can learn according to relevant how much principles, GC ⊥ AB is in C, AC=BC, AB=MN, MA ⊥ AB in A, NB ⊥ AB in B, AB//MN, CD ⊥ MN.Further can extrapolate, ∠ MDO is right angle, in triangle ODM, and OM
2=MD
2+ OD
2, i.e. R
2=(L/2)
2+ (R-DG)
2, after being dissolved, this equation can obtain:
due to φ=2R, DG=CD-x=m-x, the formula after its substitution is dissolved, can obtain
be formula:
When the caliber square of the present embodiment is used for measuring internal diameter, its principle as shown in Figure 3, suppose that fan-shaped OEF is measured workpiece, its diameter is φ, radius is R, be φ=2R, point O is its center of circle, arc EF is its arc section, line segment AM and line segment BN represent respectively the length of two claws 41, be AM=BN=m, point M and some N are the contact point of claw and arc EF, line segment MN is the distance between two claws 41, be MN=L, line segment AB represents the base plane of claw 41, it is the A-A face shown in Fig. 1, suppose that straight line CG is for moving chi 2, point G is on arc EF, straight line CG and line segment MN intersect at D, line segment AM and line segment BN are symmetrical centered by straight line CG, and be parallel to each other.Line segment CG is the displacement that chi 2 is measured front and back, i.e. CG=x.Due to a M and some N on arc EF, known according to geometrically round perpendicular bisector principle, point O is on straight line CG, due to line segment AM and line segment BN centered by straight line CG symmetrically, and be parallel to each other, and AM=BN=m, can learn according to relevant how much principles, GC ⊥ AB is in C, AC=BC, AB=MN, MA ⊥ AB in A, NB ⊥ AB in B, AB//MN, CD ⊥ MN.Further can extrapolate, ∠ MDO is right angle, in triangle ODM, and OM
2=MD
2+ OD
2, i.e. R
2=(L/2)
2+ (R-DG)
2, after being dissolved, this equation can obtain:
due to φ=2R, DG=x-CD=x-m, the formula after its substitution is dissolved, can obtain
be formula:
Embodiment 2:
The present embodiment is different from the shape that the difference of embodiment 1 is to calibrate the claw 41 on piece 4, the shape of calibrating piece 4 of the present embodiment as shown in Figure 4, being arranged on the claw 41 of calibrating on piece 4 is pin mark shape claw, distance between its two claw 41 is the distance between two claw cusps, when the caliber square of use the present embodiment is measured external diameter and internal diameter, the contact point of its claw 41 and measured workpiece circular arc is all on the cusp of claw 41, and therefore the scale value of its diameter scale does not need external diameter and separately mark of internal diameter.The principle of the caliber square of the present embodiment is identical with embodiment 1.
Embodiment 3:
The difference of the present embodiment and embodiment 1 is to calibrate piece 4 two, is respectively used to measure external diameter and measures internal diameter, changes as required the different pieces 4 of calibrating when use.For measurement piece 4 shapes of measuring external diameter as shown in Figure 5, for measurement piece 4 shapes of measuring internal diameter as shown in Figure 6, be all cutter shape claw, the distance between its two claw 41 is the distance between two claw cusps.The principle of the caliber square of the present embodiment is identical with embodiment 1.
Embodiment 4:
The caliber square of the present embodiment is to be made on the basis of common vernier caliper, uses the chi body of common calliper, moving chi and vernier to replace the chi body 1 in embodiment 1, moving chi 2 and vernier 3, and other positions in the same manner as in Example 1.In the time that the diameter of measured workpiece is less than the distance between two claws, can directly use the inner measuring jaw of vernier caliper or outer measuring jaw to measure, improve the measurement range of caliber square.
By reference to the accompanying drawings the present invention is done to detailed explanation above, but embodiments of the present invention are not limited in above-mentioned embodiment, those skilled in the art can make various distortion to the present invention according to prior art, as adopt independent digital display meter to replace to be arranged on the digital display device 32 on vernier 3 or adopt other variform pieces of calibrating to replace and calibrate piece 4 etc. in above-described embodiment, principle of the present invention is also not limited only to above-mentioned derivation mode, those skilled in the art also can derive same or similar diameter formula according to other geological theorems, these all belong to protection scope of the present invention.
Claims (7)
1. a caliber square, it is characterized in that, comprise chi body, be arranged in described chi body or described chi body on and the moving chi parallel with described chi body and be arranged on described chi body and the vernier that can slide along the length direction of described chi body, described chi body is marked with scale, described vernier with described moving chi can synchronization-moving mode being connected, the tail end of described chi body is provided with calibrates parts, calibrate the mounting blocks that parts have the tail end that is connected in described chi body, described mounting blocks both sides are respectively arranged with claw, described claw and described moving chi are positioned at same plane, and two claws are symmetrical centered by described moving chi, two claws are parallel to each other, and its distance is predefined, the length of described claw is also predefined.
2. caliber square as claimed in claim 1, is characterized in that, described claw is rectangular-shaped claw, pin mark shape claw or cutter shape claw.
3. caliber square as claimed in claim 1, is characterized in that, is carved with diameter scale and/or length scale on described chi body.
4. caliber square as claimed in claim 1, is characterized in that, on described vernier, is provided with trip bolt.
5. the caliber square as described in arbitrary claim in claim 1-4, is characterized in that, on described vernier, is provided with digital display device.
6. the caliber square as described in arbitrary claim in claim 1-4, is characterized in that, described in to calibrate between piece and described chi body be detachable connection.
7. the caliber square as described in arbitrary claim in claim 1-4, is characterized in that, described chi body, described moving chi and described vernier are respectively the chi body on vernier caliper, moving chi and vernier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410130010.7A CN103884256A (en) | 2014-04-01 | 2014-04-01 | Diameter measurement ruler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410130010.7A CN103884256A (en) | 2014-04-01 | 2014-04-01 | Diameter measurement ruler |
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| CN103884256A true CN103884256A (en) | 2014-06-25 |
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| CN201410130010.7A Pending CN103884256A (en) | 2014-04-01 | 2014-04-01 | Diameter measurement ruler |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108278955A (en) * | 2018-05-03 | 2018-07-13 | 四川大学 | A method of measuring large cylinder internal diameter |
| CN108413840A (en) * | 2018-05-03 | 2018-08-17 | 四川大学 | A method of measuring big body diameter |
| CN108571923A (en) * | 2018-05-03 | 2018-09-25 | 四川大学 | A kind of device measuring big body diameter |
| CN108827117A (en) * | 2018-05-03 | 2018-11-16 | 四川大学 | A kind of device measuring large cylinder internal diameter |
| CN111307021A (en) * | 2020-03-03 | 2020-06-19 | 浙江中技建设工程检测有限公司 | Diameter measuring device for outer wall of cambered surface structure and using method thereof |
| CN114858034A (en) * | 2022-03-28 | 2022-08-05 | 烟台南山学院 | Tool for rapidly measuring pipe and line diameter |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1026502A (en) * | 1996-07-09 | 1998-01-27 | Kenjiro Nagai | Measuring device for diameter of circularly curved wall surface |
| CN2300086Y (en) * | 1997-04-20 | 1998-12-09 | 吴亚忠 | Special measuring tool for odd tooth addendum circle and dedendum circle |
| CN2548114Y (en) * | 2002-06-28 | 2003-04-30 | 宝山钢铁股份有限公司 | Inside-diameter measuring tool |
| JP2004138388A (en) * | 2002-10-15 | 2004-05-13 | Keiichi Okuda | Radius measuring apparatus |
| CN2938015Y (en) * | 2006-06-23 | 2007-08-22 | 本溪钢铁(集团)有限责任公司 | Multifunction callipers |
| CN201266053Y (en) * | 2008-03-19 | 2009-07-01 | 欧俊 | Engaged cursor detection ruler |
| US20090223075A1 (en) * | 2008-03-07 | 2009-09-10 | Lin Wo | Gage for measuring drum brake inside diameter |
| CN101846486A (en) * | 2010-06-03 | 2010-09-29 | 中铁隆昌铁路器材有限公司 | Large circular arc radius measuring instrument and measuring method |
| CN202709964U (en) * | 2012-07-20 | 2013-01-30 | 绍兴文理学院元培学院 | Special measuring tool for non-entire round diameter |
| CN203083492U (en) * | 2012-12-27 | 2013-07-24 | 沈阳远大铝业工程有限公司 | Circular arc radius measuring device |
| CN203772189U (en) * | 2014-04-01 | 2014-08-13 | 涂振仲 | Diameter measuring ruler |
-
2014
- 2014-04-01 CN CN201410130010.7A patent/CN103884256A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1026502A (en) * | 1996-07-09 | 1998-01-27 | Kenjiro Nagai | Measuring device for diameter of circularly curved wall surface |
| CN2300086Y (en) * | 1997-04-20 | 1998-12-09 | 吴亚忠 | Special measuring tool for odd tooth addendum circle and dedendum circle |
| CN2548114Y (en) * | 2002-06-28 | 2003-04-30 | 宝山钢铁股份有限公司 | Inside-diameter measuring tool |
| JP2004138388A (en) * | 2002-10-15 | 2004-05-13 | Keiichi Okuda | Radius measuring apparatus |
| CN2938015Y (en) * | 2006-06-23 | 2007-08-22 | 本溪钢铁(集团)有限责任公司 | Multifunction callipers |
| US20090223075A1 (en) * | 2008-03-07 | 2009-09-10 | Lin Wo | Gage for measuring drum brake inside diameter |
| CN201266053Y (en) * | 2008-03-19 | 2009-07-01 | 欧俊 | Engaged cursor detection ruler |
| CN101846486A (en) * | 2010-06-03 | 2010-09-29 | 中铁隆昌铁路器材有限公司 | Large circular arc radius measuring instrument and measuring method |
| CN202709964U (en) * | 2012-07-20 | 2013-01-30 | 绍兴文理学院元培学院 | Special measuring tool for non-entire round diameter |
| CN203083492U (en) * | 2012-12-27 | 2013-07-24 | 沈阳远大铝业工程有限公司 | Circular arc radius measuring device |
| CN203772189U (en) * | 2014-04-01 | 2014-08-13 | 涂振仲 | Diameter measuring ruler |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108278955A (en) * | 2018-05-03 | 2018-07-13 | 四川大学 | A method of measuring large cylinder internal diameter |
| CN108413840A (en) * | 2018-05-03 | 2018-08-17 | 四川大学 | A method of measuring big body diameter |
| CN108571923A (en) * | 2018-05-03 | 2018-09-25 | 四川大学 | A kind of device measuring big body diameter |
| CN108827117A (en) * | 2018-05-03 | 2018-11-16 | 四川大学 | A kind of device measuring large cylinder internal diameter |
| CN108278955B (en) * | 2018-05-03 | 2019-10-25 | 四川大学 | A method of measurement large cylinder internal diameter |
| CN108827117B (en) * | 2018-05-03 | 2019-10-25 | 四川大学 | A kind of device measuring large cylinder internal diameter |
| CN108413840B (en) * | 2018-05-03 | 2019-11-08 | 四川大学 | A method of measuring big body diameter |
| CN111307021A (en) * | 2020-03-03 | 2020-06-19 | 浙江中技建设工程检测有限公司 | Diameter measuring device for outer wall of cambered surface structure and using method thereof |
| CN114858034A (en) * | 2022-03-28 | 2022-08-05 | 烟台南山学院 | Tool for rapidly measuring pipe and line diameter |
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Application publication date: 20140625 |
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