CN108571923B - A kind of device measuring big body diameter - Google Patents
A kind of device measuring big body diameter Download PDFInfo
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- CN108571923B CN108571923B CN201810413654.5A CN201810413654A CN108571923B CN 108571923 B CN108571923 B CN 108571923B CN 201810413654 A CN201810413654 A CN 201810413654A CN 108571923 B CN108571923 B CN 108571923B
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- rectangular
- measuring claw
- holes
- central axes
- side measuring
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/08—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
A kind of device measuring big body diameter is related to diameter measurement, one flat components has the rectangular through holes for running through upper and lower surfaces, two small columns are fixed in flat components left end lower surface, and the line at two small column centers is vertically divided equally by the central axes of rectangular through holes；The fixed left side measuring claw in the left side lower surface of one vernier caliper main scale, the measuring claw on the fixed right side in vernier lower surface, right side measuring claw draw close left side measuring claw, and reading at this time is 0；Two measuring claws are located in rectangular through holes, and main scale is slided in the rectangular through holes of flat components, and in sliding process, the central axes of main scale are overlapped with the central axes of rectangular through holes, and vernier slides in the sliding slot of main scale；Left side measuring claw right side and right side measuring claw left side are parallel to each other and perpendicular to the central axes of rectangular through holes；The line at left side measuring claw center and right side measuring claw center can be overlapped with the central axes of rectangular through holes.The outer diameter of cylinder of the diameter greater than 8cm can be measured.
Description
Technical field
The present invention relates to diameter measurement, the measurement of especially big body diameter or large cylinder outer diameter.
Background technique
Vernier caliper is usually used in the measurement of outer diameter, can not due to the limitation of the height of the outside diameter measuring pawl of vernier caliper
Measurement is greater than the outer diameter of 2 times of height of measuring claw.The height of the measuring claw of most of vernier caliper is 4cm, therefore outer in measurement
The outer diameter that the cylinder diameter or outer diameter that diameter is 8cm are greater than 8cm cylinder there is difficulty.
Summary of the invention
For the outer dia for accurately measuring cylinder of the outer diameter greater than 8cm or cylinder, the present invention designs a kind of measurement great circle
The device of column diameter.
The present invention realize goal of the invention the technical solution adopted is that: a kind of device measuring big body diameter, big cylinder are
Refer to that diameter is greater than the cylinder of 7cm, including a positioning through hole and vernier caliper, it is characterized in that: the upper surface of a flat components
It is parallel to each other with lower surface, a flat components have the rectangular through holes for running through upper and lower surfaces, rectangular through holes
Four sides all perpendicular to the upper surface of flat components；Two small columns are fixed in the lower surface of flat components left end, two small
The line at the center of cylinder is vertically divided equally by the central axes of rectangular through holes；The left side lower surface of the main scale of one vernier caliper is solid
Fixed left side measuring claw, the measuring claw on the fixed right side in vernier lower surface, right side measuring claw draw close left side measuring claw, and reading at this time is
0；Two measuring claws are located in rectangular through holes, and main scale is slided in the rectangular through holes of flat components, in sliding process, main scale
Central axes are overlapped with the central axes of rectangular through holes, and vernier slides in the sliding slot of main scale；Left side measuring claw right side and right side
Measuring claw left side is parallel to each other and perpendicular to the central axes of rectangular through holes；Left side measuring claw center and right side measuring claw center
Line be overlapped with the central axes of rectangular through holes, i.e. the central axes and right side measuring claw central axes of left side measuring claw form flat
Face is perpendicular to flat components upper surface and passes through the central axes of rectangular through holes；Left side measuring claw contacts on the outside of the left end of big cylinder
Face, while two small columns all contact the lateral surface of big cylinder left end, right side measuring claw contacts the lateral surface of big cylinder right end, left
The distance between side measuring claw and right side measuring claw are the diameter of big cylinder.
The length of line between two small column centers is 4-6cm.Rectangular through holes inside left-end face is to two roundlets
The distance of the column line of centres is greater than 2.0cm+d, and wherein d is the width of measuring claw left and right directions on the left of vernier caliper.
Vernier caliper simplifies are as follows: the side of rectangular through holes marks main scale scale, two small columns and flat components following table
Two circles that face contact is formed, the line at two round centers are overlapped with the zero graduation of main scale；There are two vernier, referred to as left side trips
Mark and right side vernier, it is rectangular that the width of two vernier insertions rectangular through holes part (lower end of vernier) is equal to (being essentially equal)
The width of shape through-hole, left side vernier contact the outer surface on the left of big cylinder, and right side vernier contacts outer surface on the right side of big cylinder, and two
The corresponding reading addition of vernier is exactly the diameter of big cylinder.
It is consistent with the prior art, for example the vernier of prior art vernier caliper can slide and certainly exist certain gap, only
It is that the gap is the smaller the better, such as 0.01-0.02mm, the influence for gap: assuming that gap is x, the vernier of precision 0.02mm
The length of scale is 49mm, and the length of vernier itself is greater than 49mm, and to be assumed to 50mm convenient for estimation, gap is exactly that vernier is made to incline
Oblique: main scale is deviateed in end thereof contacts main scale, one end, is equivalent to hypotenuse, gap is equivalent to the height of triangle, corresponding
It is measured as projection (50 of the bevel edge on main scale2-x2)0.5, then bring deviation in gap is 50-(502-x2)0.5, it is assumed that the deviation
For 50-(502-x2)0.5=0.02mm, then x=1.4mm, does not need so big gap generally, and gap is light enough in 0.1mm in fact
Pine sliding, prior art gap accomplishes that 0.01mm is also possible.0.1mm bring deviation are as follows: 50-(502-0.12)0.5=
Therefore 0.0001mm, the far smaller than measurement accuracy of vernier caliper under the prior art, can be avoided gap to measurement accuracy
Influence.
The beneficial effects of the present invention are: the perpendicular bisector of the chord length of theoretically disc is located at diameter of a circle direction, because
This present invention vertically divides the line of two small columns equally using the central axes of rectangular through holes, realizes and surveys to the outer diameter of vernier caliper
Being oriented on the diameter of a circle direction of cylinder upper surface place for measuring jaw is moved, so that diameter of a circle where cylinder upper surface is measured,
The diameter of diameter of a circle i.e. cylinder where cylinder upper surface；It is less than the cylinder of 7cm for diameter, common calliper is
It can measure.
Detailed description of the invention
Fig. 1 is flat components upper surface schematic diagram；Fig. 2 is flat components lower surface schematic diagram；Fig. 3 is vernier caliper signal
Figure；
Wherein, the width of the left measuring claw of d, vernier caliper, 1, flat components, 2, upper surface, 3, lower surface, 4, small column,
5, measuring claw, 6, main scale, 7, vernier, 8, through-hole.
Specific embodiment
The height of general vernier caliper measurement pawl 5 is 4cm, and two measuring claws 5 can block 8cm diameter below, i.e.,
Diameter 8cm body diameter below can be measured, the cylinder for diameter greater than 8cm can not just block；If the height of measuring claw 5
Spend that direction is parallel with the axis direction of cylinder, then it is most of measure be circle where cylinder upper surface chord length, be difficult accurately to survey
Measure the size of big body diameter.In order to effectively dock with the diameter measurement range of existing vernier caliper, method of the invention is downward
The diameter range of 7-8cm is covered, therefore big cylinder refers to that diameter is greater than the cylinder of 7cm, the present invention can measure diameter 7cm or more
The diameter of cylinder, constraint of the upper limit by vernier caliper range, the i.e. upper limit are the measurement upper limit (the outside diameter measuring amount of vernier caliper
The upper limit of journey).One flat components 1 has the rectangular through holes 8 for running through upper surface 2 and lower surface 3,1 left end of flat components
Lower surface 3 fix two small columns 4, the line at the center of two small columns 4 is vertically put down by the central axes of rectangular through holes 8
Point；The fixed left side measuring claw 5 in the left side lower surface of the main scale 6 of one vernier caliper, the measuring claw on the fixed right side in 7 lower surface of vernier
5, right side measuring claw 5 draws close left side measuring claw 5, and reading at this time is that 0(is not 0, then is denoted as homodyne)；Two measuring claws 5 are located at
In rectangular through holes 8, main scale is slided in the rectangular through holes 8 of flat components 1, in sliding process, the central axes of main scale 6 with it is rectangular
(there are many mode of realization, for example main scale 6 is a rectangular flat plate, and centre has a through-hole embedding for the central axes coincidence of shape through-hole 8
Cover vernier, rectangular flat plate main scale slides in the sliding slot of 8 side of rectangular through holes of flat components 1, i.e. rectangular through holes
The vertical direction neutrality line of four sides has a groove, the depth of Fig. 1 front-rear direction groove and the width of rectangular through holes
The sum of be equal to the width of rectangular flat plate main scale, for matching and easy for installation, the right ends of rectangular through holes 8 is detachable structure,
The right end of rectangular through holes 8 is dismantled, main scale is packed into, fixes right end again), vernier 7 is slided in the sliding slot of main scale 6 (it is recommended that master
Ruler has a through-hole, and vernier upper surface is located above through-hole, i.e. the width of the upper surface width that is greater than main scale through-hole, vernier lower surface
Two sides cut-out forms the intermediate protrusion of lower surface, and the width for protruding part is equal to the width of main scale through-hole)；Left side measurement
5 right side of pawl and 5 left side of right side measuring claw are parallel to each other and perpendicular to the central axes of rectangular through holes 8；In left side measuring claw 5
The line at 5 center of the heart and right side measuring claw can be overlapped with the central axes of rectangular through holes 8, i.e. the central axes of left side measuring claw 5
The plane formed with 5 central axes of right side measuring claw (being parallel to each other) is perpendicular to 1 upper surface of flat components and passes through rectangular through holes 8
Central axes；The measuring claw 5 in left side contacts the left end lateral surface of big cylinder, while two small columns 4 all contact big cylinder left end
Lateral surface (two small columns 4 are located at the line between the contact point of main scale periphery, are one of big cylinder upper end disc
Chord length, due to symmetry, the line between two small column contact points is parallel to the line at two small column centers, the chord length institute
Line of the straight line parallel between the center of two small columns, that is to say, that the chord length is put down by the central axes of rectangular through holes 8
Point, diameter of a circle direction where 8 central axes of rectangular through holes i.e. big cylinder upper end face), the measuring claw 5 on right side contacts greatly
The lateral surface of cylinder right end, the distance between left side measuring claw 5 and right side measuring claw 5 are the diameter of big cylinder.
Want can to contact the outside of big cylinder, then chord length should be less than diameter, consider measurement range of the invention 7cm with
On, therefore chord length (ignoring the diameter of small column, chord length is approximately the distance between two small column centers) should be less than
7cm, if chord length is too small, production it is upper there is also certain difficulty (because left side measuring claw will between two small columns,
Measuring claw has certain thickness, and small column itself has certain diameter；Small column is too small, and intensity is relatively low, and fixation is also compared
It is difficult), it is therefore proposed that the length of the line between two 4 centers of small column is 4-6cm.Small column 4 suggest diameter in 5-8mm,
Small column 4 has internal screw thread, by the through-hole and nut (having external screw thread) of flat components 1, is threadedly secured in the following tables of flat components 1
Face, nut are exposed at upper surface.
All there is a certain distance in the edge of center to the circle of any chord length of big cylinder upper surface, certain in chord length
It is strong it is mad under, diameter is smaller, distance is bigger, and in the case where diameter is certain, chord length is longer, distance is bigger, if chord length is 6cm
(half length is 3cm), diameter are that 7cm(radius is 3.5cm), then the distance is (3.5*3.5-3*3)0.5=1.8cm, i.e. great circle
Column to the left side maximum protrusion height of two small column lines be 1.8cm, since 8 inside left-end face of rectangular through holes is parallel to two
A 4 line of centres of small column, it is therefore proposed that the distance of rectangular through holes 8 inside left-end face to two 4 lines of centres of small column is big
In 2.0cm+d, wherein d is the width of the left measuring claw 5 of vernier caliper, ensures that the left measuring claw 5 of vernier caliper can have foot in this way
Enough activity spaces are to touch big cylinder left end outer surface.
In order to keep device more simplified, the scale of the main scale of vernier caliper can be marked in the side of rectangular through holes or two
There are scale in side, the i.e. wherein side or two sides of the front-rear direction (Fig. 1) of rectangular through holes, and zero graduation is located at a rectangular through holes left side
The center of right direction deviates to the left, for example distance of the zero graduation apart from rectangle left end face is 2.0cm, optimum position
It is that zero graduation is aligned with the line at two small column centers, there are two vernier, referred to as left side vernier and right side vernier, left side verniers
The outer surface on the left of big cylinder is contacted, right side vernier contacts outer surface on the right side of big cylinder, and the corresponding reading of two verniers is added, just
It is the diameter of big cylinder.
Claims (1)
1. a kind of device for measuring big body diameter, big cylinder refers to that diameter is greater than the cylinder of 7cm, including a positioning through hole and
Vernier caliper, it is characterized in that: the upper and lower surfaces of a flat components (1) are parallel to each other, a flat components (1) has one
A rectangular through holes (8) through upper surface (2) and lower surface (3), four sides of rectangular through holes (8) are all perpendicular to plane
The upper surface of component (1)；Two small columns (4) are fixed in the lower surface (3) of flat components (1) left end, in two small columns (4)
The line of the heart is vertically divided equally by the central axes of rectangular through holes (8)；The left side lower surface of the main scale (6) of one vernier caliper is fixed
Left side measuring claw (5), the measuring claw (5) on the fixed right side in vernier (7) lower surface, right side measuring claw (5) draw close left side measuring claw
(5), reading at this time is 0；Two measuring claws (5) are located in rectangular through holes (8), rectangle of the main scale in flat components (1)
Through-hole (8) slides, and in sliding process, the central axes of main scale (6) are overlapped with the central axes of rectangular through holes (8), and vernier (7) is in master
It is slided in the sliding slot of ruler (6)；Left side measuring claw (5) right side and right side measuring claw (5) left side are parallel to each other and perpendicular to length
The central axes of square through hole (8)；The line at left side measuring claw (5) center and right side measuring claw (5) center and rectangular through holes (8)
Central axes be overlapped, i.e., left side measuring claw (5) central axes and right side measuring claw (5) central axes formed plane perpendicular to plane
Component (1) upper surface and the central axes for passing through rectangular through holes (8)；Left side measuring claw (5) contacts the left end lateral surface of big cylinder,
Two small columns (4) all contact the lateral surface of big cylinder left end simultaneously, and right side measuring claw (5) contacts the outside of big cylinder right end
Face, the distance between left side measuring claw (5) and right side measuring claw (5) are the diameter of big cylinder；Between two small column (4) centers
The length of line be 4-6cm, small column (4) diameter has internal screw thread in 5-8mm, small column (4), passes through flat components (1)
Rectangular through holes (8) and nut, the lower surface for being threadedly secured in flat components (1), nut are exposed at upper surface；Rectangular through holes
(8) distance of inside left-end face to two small column (4) lines of centres is greater than 2.0cm+d, and wherein d is measurement on the left of vernier caliper
The width of pawl (5) left and right directions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810413654.5A CN108571923B (en) | 2018-05-03 | 2018-05-03 | A kind of device measuring big body diameter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810413654.5A CN108571923B (en) | 2018-05-03 | 2018-05-03 | A kind of device measuring big body diameter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108571923A CN108571923A (en) | 2018-09-25 |
| CN108571923B true CN108571923B (en) | 2019-11-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810413654.5A Expired - Fee Related CN108571923B (en) | 2018-05-03 | 2018-05-03 | A kind of device measuring big body diameter |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2142144A (en) * | 1983-06-21 | 1985-01-09 | Ralph Adair | Improvements in vernier caliper gauges |
| JPS6093301A (en) * | 1983-10-27 | 1985-05-25 | Nobuo Sumitomo | Centering tool of round body |
| 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 |
| CN202144164U (en) * | 2011-07-11 | 2012-02-15 | 金华职业技术学院 | Straight ruler capable of measuring diameter |
| CN202599299U (en) * | 2012-03-10 | 2012-12-12 | 王慧 | Circular arc radius measuring instrument |
| CN202522172U (en) * | 2012-03-29 | 2012-11-07 | 张冰 | Diameter measuring device |
| CN202747981U (en) * | 2012-09-13 | 2013-02-20 | 天祥(天津)质量技术服务有限公司 | Measurement instrument for inner diameter of barrel |
| CN103884256A (en) * | 2014-04-01 | 2014-06-25 | 涂振仲 | Diameter measurement ruler |
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2018
- 2018-05-03 CN CN201810413654.5A patent/CN108571923B/en not_active Expired - Fee Related
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| CN108571923A (en) | 2018-09-25 |
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