CN109974565A - Measuring instrument - Google Patents
Measuring instrument Download PDFInfo
- Publication number
- CN109974565A CN109974565A CN201711465942.7A CN201711465942A CN109974565A CN 109974565 A CN109974565 A CN 109974565A CN 201711465942 A CN201711465942 A CN 201711465942A CN 109974565 A CN109974565 A CN 109974565A
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- CN
- China
- Prior art keywords
- turntable
- shell
- measuring instrument
- measuring
- measuring scale
- 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.)
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Classifications
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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
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B5/245—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing perpendicularity
-
- 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
- G01B5/28—Measuring arrangements characterised by the use of mechanical techniques for measuring roughness or irregularity of surfaces
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
The invention discloses a kind of measuring instruments, comprising: shell, the outer profile of the shell are formed as polygon and with multiple for being bonded the datum level of component to be measured;Turntable, the turntable set on the housing and can be rotated around its axis;Measuring scale, the measuring scale are located on the turntable and as the turntable rotate, and accommodating chamber is defined in the measuring scale, is filled with liquid in the accommodating chamber;Balance element, the balance element are movably located in the accommodating chamber and are suspended in the liquid.Measuring instrument according to an embodiment of the present invention, by the way that rotatable turntable is arranged inside the shell, the measuring scale on turntable can be rotated synchronously with turntable, be guaranteed when measuring inclined-plane, balance element is still in the measurement range of measuring scale, consequently facilitating the measurement to the clinoplain depth of parallelism.
Description
Technical field
The present invention relates to technical field of measuring equipment, in particular to a kind of measuring instrument.
Background technique
In industrial circle, it is often necessary to the depth of parallelism and verticality and other masters to the Different Plane of equipment, component etc.
Angular relationship is wanted to measure.By taking the measurement of paralleism of two planes of machining equipment as an example, at present for mainly measure
Means are that equipment is placed on reference platform, are measured by parallelism measuring instrument, therefore current measuring technique needs
It wants matched reference platform, and needs more complex carry and hoist operation, higher cost and complicated for operation.Moreover, there are many set
It is standby not have the condition for being lifted on and measuring on reference platform, such as equipment of some large sizes, so that the crucial ginseng of these equipment
The measurements such as several depth of parallelism verticalities become problem.In addition, the depth of parallelism in equipment between two clinoplains is because being difficult to matching
The reference platform of volume is also difficult to measure, so that the depth of parallelism of clinoplain and squareness measurement become problem.
Summary of the invention
The present invention is directed to solve one of above-mentioned technical problem in the related technology at least to a certain extent.For this purpose, this hair
Bright to propose a kind of measuring instrument, the measuring instrument structure is simple, easy to use.
Measuring instrument according to an embodiment of the present invention includes: shell, and the outer profile of the shell is formed as polygon and has
Multiple datum levels for being used to be bonded component to be measured;Turntable, the turntable set on the housing and can be rotated around its axis;It surveys
Gage, the measuring scale are located on the turntable and as the turntable rotate, and define accommodating chamber in the measuring scale, described
Liquid is filled in accommodating chamber;Balance element, the balance element are movably located in the accommodating chamber and are suspended in the liquid
In.
Measuring instrument according to an embodiment of the present invention, the measuring scale by the way that rotatable turntable is arranged inside the shell, on turntable
It can be rotated synchronously with turntable, guarantee that, when measuring inclined-plane, balance element is still in the measurement range of measuring scale, consequently facilitating to inclining
The measurement of the tapered plane depth of parallelism.
According to one embodiment of present invention, the outer profile of the shell is formed as regular polygon.
Optionally, the outer profile of the shell is formed as octagon.
According to one embodiment of present invention, the measuring instrument further include: shaft, the shaft are located in the shell
Heart position, the turntable are rotationally connected by the shaft with the shell.
Optionally, the position of the neighbouring turntable is equipped with reference line on the shell, and the periphery of the turntable is equipped with along it
The first graduation mark being circumferentially arranged, the turntable are can be rotated relative to the reference line to adjust the rotation angle of the turntable.
Preferably, the measuring scale is located at the side of the shaft and is formed as the arc far from the shaft bending.
Further, the line at the both ends of the measuring scale is by the shaft and the measuring scale is relative to perpendicular to institute
The vertical line for stating line is symmetrical arranged.
Further, the measuring scale is equipped with and arranges along its length and be used to indicate the balance element position
The second graduation mark.
According to one embodiment of present invention, the balance element is formed as the bubble being located in the accommodating chamber.
Optionally, the balance element is formed as spherical shape, triangle or pointer shape of the density less than the density of the liquid
Materials and parts.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 is the structural schematic diagram of measuring instrument according to an embodiment of the present invention.
Fig. 2 is the usage state diagram of measuring instrument according to an embodiment of the present invention.
Appended drawing reference:
Measuring instrument 100;
Shell 10;Datum level 11;Reference line 12;
Turntable 20;First graduation mark 21;
Measuring scale 30;Second graduation mark 31;
Balance element 40;Shaft 50;
Component 200 to be measured;Boss 201.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " on ", "lower", "vertical", "horizontal", "top", "bottom"
The orientation or positional relationship of the instructions such as "inner", "outside", " axial direction ", " radial direction ", " circumferential direction " is orientation based on the figure or position
Relationship is set, is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning are necessary
It with specific orientation, is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, at this
In the description of invention, unless otherwise indicated, the meaning of " plurality " is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected;It can
To be mechanical connection, it is also possible to be electrically connected;It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Below with reference to the accompanying drawings measuring instrument 100 according to an embodiment of the present invention is described.
As depicted in figs. 1 and 2, measuring instrument 100 according to an embodiment of the present invention includes shell 10, turntable 20, measuring scale 30
With balance element 40.
Specifically, the outer profile of shell 10 is formed as polygon and with multiple for being bonded the benchmark of component to be measured
Face 11, turntable 20 are located on shell 10 and can be rotated around its axis, and measuring scale 30 is located on turntable 20 and as turntable 20 rotates,
Accommodating chamber is defined in measuring scale 30, liquid is filled in accommodating chamber, and balance element 40 is movably located in accommodating chamber and suspends
In a liquid.
In other words, measuring instrument 100 according to an embodiment of the present invention mainly by shell 10, set turntable 20 on the shell, set
It is constituted in the measuring scale 30 on turntable 20 and the balance element 40 being located in measuring scale 30, wherein shell 10 can be formed to have
Certain thickness plate structure, the outer profile of shell 10 are equipped with multiple datum levels 11, the depth of parallelism, verticality between each datum level
Angularly relationship needs to guarantee by strictly processing.Turntable 20 is located on a side surface of shell 10 and can turn on shell 10
Dynamic, measuring scale 30 is located on turntable 20 and can rotate synchronously with turntable 20, and measuring scale 30 can be hollow transparent material
Part, the interior accommodating chamber limited of measuring scale 30 can be used for filling liquid, such as water, be equipped with balance element 40 in accommodating chamber simultaneously, flat
Weighing apparatus part 40 can float on a liquid and movable in a liquid, and balance element 40 is displayed for whether measuring scale 30 is in
Horizontality can be used for marking depth of parallelism, gradient or verticality of plane to be measured etc..
Shell 10 can have at least two horizontally extending datum levels 11 and two extend along the vertical direction
The original state of datum level 11, measuring scale 30 can extend generally in a horizontal direction.Horizontally extending datum level 11 can
With the depth of parallelism for detecting the plane to be measured that two extend generally in a horizontal direction, the datum level 11 that extends along the vertical direction
Can be used for detecting the depth of parallelism for the plane to be measured that two extend substantially in the vertical direction, one in the horizontal direction with an edge
The datum level 11 that vertical direction extends then can be used for detecting the verticality of two planes to be measured.In this case, balance element
In the measurement range of measuring scale 30, turntable 20 can not need to be adjusted 40 scope of activities with the position of measuring scale 30
The datum level 11 of measuring instrument 100, is directly placed in two planes of the parts to be tested by section, is by recording 40 position of balance element
Whether meet the depth of parallelism or verticality requirement than to two planes to be measured of the parts to be tested.
When needing detection to tilt the depth of parallelism on two inclined-planes of extension relative to horizontal direction, if the tilt angle on inclined-plane
Larger, when directly being measured with measuring instrument 100, the moving position of balance element 40 can exceed the measurement range of measuring scale 30.?
In this case, can rotate turntable 20 according to the tilt angle on inclined-plane to be measured make measuring scale 30 relative to horizontal direction substantially
In parallel, to guarantee that the moving position of balance element 40 in the measurement range of measuring scale 30, is realized to two inclined ramps always
The depth of parallelism and verticality measurement.
Measuring instrument 100 according to an embodiment of the present invention as a result, is turned by the way that rotatable turntable 20 is arranged in shell 10
Measuring scale 30 on disk 20 can be rotated synchronously with turntable 20, guarantee that balance element 40 is still in measuring scale 30 when measuring inclined-plane
In measurement range, consequently facilitating the measurement to the clinoplain depth of parallelism, it is not only easy to operate to change measuring instrument 100, but also measure essence
Degree is high, greatly reduces research and development cost and time cycle.
According to one embodiment of present invention, the outer profile of shell 10 is formed as regular polygon.Optionally, shell 10 is outer
Profile is formed as octagon.The shell 100 of the structure not only has what is extended in the horizontal direction and along the vertical direction to put down as a result,
Face, and also have tilt four inclined-planes of extension relative to horizontal direction simultaneously, can satisfy a variety of planes the depth of parallelism or
The measurement of verticality.
In some embodiments of the invention, measuring instrument 100 further includes shaft 50, and shaft 50 is located in shell 10
Heart position, turntable 20 are rotationally connected by shaft 50 with shell 10.As shown in Figure 1, that is to say, that shaft 20 is by turning
Axis 50 is rotatably arranged on shell 10.100 structure of measuring instrument is simple as a result, and turntable 20 and shell 10 are easy to assembly, opens
Send out low in cost.
Optionally, the position of neighbouring turntable 20 is equipped with reference line 12 on shell 10, and the periphery of turntable 20 is equipped with along its circumferential direction
First graduation mark 21 of arrangement, turntable 20 are can be rotated relative to reference line 12 to adjust the rotation angle of turntable 20.
Specifically, as shown in Figure 1, the position of the neighbouring outer profile of turntable 20 is equipped with first graduation mark 21, Duo Ge of circle
The cooperation of one graduation mark 21 constitutes limbus table, and limbus table can cooperate with the reference line 12 on shell 10 to show turntable
20 angles rotated relative to shell 10, to meet the measurement needs on different inclined-planes.
According to one embodiment of present invention, measuring scale 30 is located at the side of shaft 50 and is formed as far from 50 bending of shaft
Arc.Preferably, the line at the both ends of measuring scale 30 is by shaft 50 and measuring scale 30 is relative to perpendicular to the vertical of line
Line is symmetrical arranged.
That is, measuring scale 30 is formed as a micro-arc ruler, the both ends of measuring scale 30 are located at the two of shaft 50
Side, and the line at the both ends of measuring scale 30 passes through shaft 50, the line on turntable 20 perpendicular to the both ends of measuring scale 30 hang down
The symmetry axis of straight line composition measuring scale 30.The measuring scale 30 of the structure is not only handsome in appearance as a result, but also can guarantee measurement
Accuracy.
In certain specific embodiments of the invention, measuring scale 30 is equipped with and arranges and be used to indicate along its length
Second graduation mark 31 of 40 position of balance element.Specifically, as shown in Figure 1, measuring scale 30 is equipped with multiple second graduation marks
31, the second graduation mark 31 can be used for identifying 40 position of balance element, convenient that measurement result is recorded and compared, thus
Further increase the accuracy of measurement.
According to one embodiment of present invention, balance element 40 can be formed as the bubble being located in accommodating chamber.In the present invention
Other specific embodiments in, balance element 40 can also be formed as density less than the spherical shape of density of liquid, triangle or
Pointer type plastic part.For the balance element 40 while guaranteeing measuring accuracy, structure is simple, and preparation cost is cheap as a result,.
The use process of measuring instrument 100 according to an embodiment of the present invention is specifically described below with reference to Fig. 2.
As shown in Fig. 2, component 200 to be measured has boss 201, need to measure the upper and lower surfaces of boss 201
When the depth of parallelism, the datum level 11 of 100 lower end of measuring instrument is placed on the upper surface of boss 201, is read at this time by measuring scale 30
40 place scale value of balance element simultaneously records scale A, and then the datum level 11 of the upper end of measuring instrument 100 is placed under boss 201
Surface reads 40 place scale value of balance element at this time by measuring scale 30 and records scale B.Pass through the comparison of scale A and scale B
Whether met the requirements with the depth of parallelism of acceptance criteria you can get it two planes.
Equally, when needing to carry out parallelism detection to inclined inclined-plane, turntable 20 can be rotated to suitable position first
It sets, guarantees that balance element 40 can put down clinoplain referring to above-mentioned measurement method in the measurement range of measuring scale 30
Row degree measures.
To sum up, measuring instrument 100 according to an embodiment of the present invention, by the way that rotatable turntable is arranged in shell 10
20, the measuring scale 30 on turntable 20 can be rotated synchronously with turntable 20, guarantee that balance element 40 is still in measuring scale when measuring inclined-plane
In 30 measurement range, consequently facilitating the measurement to the clinoplain depth of parallelism, it is not only easy to operate to change measuring instrument 100, but also survey
Accuracy of measurement is high, greatly reduces research and development cost and time cycle.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means specific features described in conjunction with this embodiment or example, knot
Structure, material or feature are included at least one embodiment or example of the invention.In the present specification, to above-mentioned term
Schematic representation may not refer to the same embodiment or example.Moreover, specific features, structure, material or the spy of description
Point can be combined in any suitable manner in any one or more of the embodiments or examples.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this
The range of invention is defined by the claims and their equivalents.
Claims (10)
1. a kind of measuring instrument characterized by comprising
Shell, the outer profile of the shell are formed as polygon and with multiple for being bonded the datum level of component to be measured;
Turntable, the turntable set on the housing and can be rotated around its axis;
Measuring scale, the measuring scale are located on the turntable and as the turntable rotate, and define receiving in the measuring scale
Chamber, the accommodating chamber is interior to be filled with liquid;
Balance element, the balance element are movably located in the accommodating chamber and are suspended in the liquid.
2. measuring instrument according to claim 1, which is characterized in that the outer profile of the shell is formed as regular polygon.
3. measuring instrument according to claim 2, which is characterized in that the outer profile of the shell is formed as octagon.
4. measuring instrument according to claim 2 or 3, which is characterized in that further include:
Shaft, the shaft are located at the center of the shell, and the turntable can be rotated by the shaft and the shell
Ground is connected.
5. measuring instrument according to claim 4, which is characterized in that the position of the neighbouring turntable is equipped with base on the shell
Directrix, the periphery of the turntable are equipped with the first graduation mark being circumferentially arranged along it, and the turntable can turn relative to the reference line
The dynamic rotation angle to adjust the turntable.
6. measuring instrument according to claim 4, which is characterized in that the measuring scale is located at the side of the shaft and formation
For the arc far from the shaft bending.
7. measuring instrument according to claim 6, which is characterized in that the line at the both ends of the measuring scale passes through the shaft
And the measuring scale is symmetrical arranged relative to the vertical line perpendicular to the line.
8. measuring instrument according to claim 6, which is characterized in that the measuring scale be equipped with along its length arrangement and
It is used to indicate the second graduation mark of the balance element position.
9. measuring instrument according to claim 1, which is characterized in that the balance element is formed as being located in the accommodating chamber
Bubble.
10. measuring instrument according to claim 1, which is characterized in that the balance element is formed as density less than the liquid
Density spherical shape, triangle or pointer type plastic part.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201711465942.7A CN109974565A (en) | 2017-12-28 | 2017-12-28 | Measuring instrument |
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CN201711465942.7A CN109974565A (en) | 2017-12-28 | 2017-12-28 | Measuring instrument |
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CN109974565A true CN109974565A (en) | 2019-07-05 |
Family
ID=67075359
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CN201711465942.7A Pending CN109974565A (en) | 2017-12-28 | 2017-12-28 | Measuring instrument |
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Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH443704A (en) * | 1966-09-08 | 1967-09-15 | Raimann Werner | Level angle measuring device |
DE2854685A1 (en) * | 1978-12-18 | 1980-07-10 | Klaus Sokoliss | Circular spirit level angle and inclination measurement device - has circular hollow fluid-filled section contg. gas bubble in housing with several surfaces |
KR940021092U (en) * | 1993-02-10 | 1994-09-24 | 현 고 | Vertical leveler |
CN2242441Y (en) * | 1995-06-19 | 1996-12-11 | 潘祖涛 | Level-meter of any angle |
CN2254542Y (en) * | 1996-04-22 | 1997-05-21 | 江宝民 | Multi-purpose detecting instrument for woodworking machine |
JP2004226390A (en) * | 2002-11-27 | 2004-08-12 | 欣哉 ▲浜▼田 | Gradient rule |
CN1793783A (en) * | 2005-12-25 | 2006-06-28 | 刘英杰 | Level tetradirection inclination angle measuring instrument |
KR20080004099U (en) * | 2007-03-21 | 2008-09-25 | 삼성중공업 주식회사 | A level |
CN102393192A (en) * | 2011-09-23 | 2012-03-28 | 中建三局建设工程股份有限公司 | Dial protractor and using method thereof |
CN203190970U (en) * | 2013-03-30 | 2013-09-11 | 揣新 | Two-way measurement universal level |
US20150101203A1 (en) * | 2013-10-10 | 2015-04-16 | J. Yen Ligh | Slope and level angle measuring device |
CN204514320U (en) * | 2015-04-25 | 2015-07-29 | 黑龙江职业学院 | A kind of mechanical engineering level meter |
CN205843663U (en) * | 2016-03-22 | 2016-12-28 | 沈向安 | Water level |
CN207832100U (en) * | 2017-12-28 | 2018-09-07 | 国家电投集团科学技术研究院有限公司 | Measuring instrument |
-
2017
- 2017-12-28 CN CN201711465942.7A patent/CN109974565A/en active Pending
Patent Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH443704A (en) * | 1966-09-08 | 1967-09-15 | Raimann Werner | Level angle measuring device |
DE2854685A1 (en) * | 1978-12-18 | 1980-07-10 | Klaus Sokoliss | Circular spirit level angle and inclination measurement device - has circular hollow fluid-filled section contg. gas bubble in housing with several surfaces |
KR940021092U (en) * | 1993-02-10 | 1994-09-24 | 현 고 | Vertical leveler |
CN2242441Y (en) * | 1995-06-19 | 1996-12-11 | 潘祖涛 | Level-meter of any angle |
CN2254542Y (en) * | 1996-04-22 | 1997-05-21 | 江宝民 | Multi-purpose detecting instrument for woodworking machine |
JP2004226390A (en) * | 2002-11-27 | 2004-08-12 | 欣哉 ▲浜▼田 | Gradient rule |
CN1793783A (en) * | 2005-12-25 | 2006-06-28 | 刘英杰 | Level tetradirection inclination angle measuring instrument |
KR20080004099U (en) * | 2007-03-21 | 2008-09-25 | 삼성중공업 주식회사 | A level |
CN102393192A (en) * | 2011-09-23 | 2012-03-28 | 中建三局建设工程股份有限公司 | Dial protractor and using method thereof |
CN203190970U (en) * | 2013-03-30 | 2013-09-11 | 揣新 | Two-way measurement universal level |
US20150101203A1 (en) * | 2013-10-10 | 2015-04-16 | J. Yen Ligh | Slope and level angle measuring device |
CN204514320U (en) * | 2015-04-25 | 2015-07-29 | 黑龙江职业学院 | A kind of mechanical engineering level meter |
CN205843663U (en) * | 2016-03-22 | 2016-12-28 | 沈向安 | Water level |
CN207832100U (en) * | 2017-12-28 | 2018-09-07 | 国家电投集团科学技术研究院有限公司 | Measuring instrument |
Non-Patent Citations (1)
Title |
---|
李向华: "《制浆造纸设备安装与维修 第2版》", 中国轻工业出版社, pages: 5 - 6 * |
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