CN201215691Y - Circumference ratio measuring instrument - Google Patents
Circumference ratio measuring instrument Download PDFInfo
- Publication number
- CN201215691Y CN201215691Y CNU2008200232649U CN200820023264U CN201215691Y CN 201215691 Y CN201215691 Y CN 201215691Y CN U2008200232649 U CNU2008200232649 U CN U2008200232649U CN 200820023264 U CN200820023264 U CN 200820023264U CN 201215691 Y CN201215691 Y CN 201215691Y
- Authority
- CN
- China
- Prior art keywords
- guide plate
- wood
- circle
- measuring instrument
- circumference ratio
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a circumference ratio measuring instrument, which mainly comprises a guide plate 6 and a bottom board 8. The utility model is characterized in that one side of the guide plate 6 is provided with a guide path 5, and the guide plate 6 is fixed with the bottom board 8 through supporting stands 9 arranged on two ends, a staff gauge is incised on the upper surface of the bottom board 8, and a circular rolling wood 1, a circular rolling wood 3 and a circular rolling wood 4 are connected with a dead plate 2 through a rotary shaft, one end of a rotary shaft 7 is connected with the circular rolling wood 3, and the other end is arranged in the guide path 5 in the guide plate 6. With the arrangement, the circumference ratio measuring instrument can directly measure the circumferences and the diameters of a plurality of circular objects whose sizes are different, thereby providing convenience for the teaching of circumference ratio.
Description
Technical field
The utility model relates to a kind of teaching aid, is a kind of circular constant measuring instrument specifically.
Background technology
Circular constant is measured, and at present when circular constant is measured, measures the several circular article that differ in size one by one with tape measure, calculates girth and diameter, utilizes girth and diameter to calculate their ratio again, is circular constant, and is cumbersome in operating process.
Summary of the invention
The purpose of this utility model is to make a circular constant measuring instrument, can measure the girth and the diameter of several circular article that differ in size intuitively, thereby provides convenience for the teaching of circular constant.
For reaching above purpose, the circular constant measuring instrument, mainly form by guide plate 6, base plate 8, it is characterized in that, be provided with a gathering sill 5 in a side of guide plate 6, guide plate 6 is fixing with base plate 8 by the support 9 that is located at two ends, upper surface at base plate 8 all is carved with scale, circle rolls that wood 1, circle roll wood 3, circle is rolled wood 4 and linked together by rotating shaft and fixed head 2, and an end and the circle of rotating shaft 7 rolled wooden 3 and be connected, and the other end is located in the gathering sill 5 in the guide plate 6.
Roll wood 1 in circle, circle is rolled wood 3, circle roll wood be equipped with on 4 A1 B1, A2 B2, A3 the mark of B3, A1 B1, A2 B2, A3 distance between the B3 be certain numerical value, promptly known three circles roll wood different-diameter, when three circles roll wood from A1 A2 A3 rotate a thoughtful A1 A2 during A3, read separately distance from base plate 8, promptly our three circles will measuring are rolled the girth of wood, are circular constant with separately girth than fixing separately diameter again, saved the process with the tape measuring girth, practical operation is simple and practical.
Description of drawings
Fig. 1 is the utility model front view
Fig. 2 is the utility model vertical view
Among the figure 1, circle rolls that wood 2, fixed head 3, circle roll wood 4, circle is rolled wood 5, gathering sill 6, guide plate 7, rotating shaft 8, base plate 9, support
Embodiment
The utility model mainly is made up of guide plate 6, base plate 8, side at guide plate 6 is provided with a gathering sill 5, guide plate 6 is fixing with base plate 8 by the support 9 that is located at two ends, upper surface at base plate 8 all is carved with scale, circle rolls that wood 1, circle roll wood 3, circle is rolled wood 4 and linked together by rotating shaft and fixed head 2, one end and the circle of rotating shaft 7 rolled wood and 3 is connected, and the other end is located in the gathering sill 5 in the guide plate 6.
Claims (1)
1, circular constant measuring instrument, mainly form by guide plate (6), base plate (8), it is characterized in that: the side at guide plate (6) is provided with a gathering sill (5), guide plate (6) is fixing with base plate (8) by the support (9) that is located at two ends, upper surface at base plate (8) all is carved with scale, circle rolls that wood (1), circle roll wood (3), circle is rolled wood (4) and linked together by rotating shaft and fixed head (2), one end of rotating shaft (7) rolls wood (3) with circle and is connected, and the other end is located in the gathering sill (5) in the guide plate (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200232649U CN201215691Y (en) | 2008-05-27 | 2008-05-27 | Circumference ratio measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200232649U CN201215691Y (en) | 2008-05-27 | 2008-05-27 | Circumference ratio measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201215691Y true CN201215691Y (en) | 2009-04-01 |
Family
ID=40520896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200232649U Expired - Fee Related CN201215691Y (en) | 2008-05-27 | 2008-05-27 | Circumference ratio measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201215691Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106097839A (en) * | 2016-03-10 | 2016-11-09 | 陈绍东 | The girth of a kind of circle and radius relationship apparatus for demonstrating |
-
2008
- 2008-05-27 CN CNU2008200232649U patent/CN201215691Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106097839A (en) * | 2016-03-10 | 2016-11-09 | 陈绍东 | The girth of a kind of circle and radius relationship apparatus for demonstrating |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203337061U (en) | Thin-walled cylinder sleeve diameter and circularity rapid detection device | |
| CN101915532B (en) | Wall thickness difference detector | |
| CN201715984U (en) | Novel pitch-row distance admeasuring apparatus | |
| CN201215691Y (en) | Circumference ratio measuring instrument | |
| CN203798342U (en) | Special-purpose test tool for measurement | |
| CN202533063U (en) | Novel wire measuring instrument | |
| CN202470954U (en) | Building member height measuring device | |
| CN202216684U (en) | Axial gap measuring device for transmission shaft assembly | |
| CN204831238U (en) | Measure measuring tool that many wedges belt pulley is radial and axial is beated | |
| CN208567722U (en) | A kind of rubber size detection device | |
| CN105180857A (en) | Measuring tool and method for measuring radial and axial runout of multi-wedge belt pulley | |
| CN201772843U (en) | Wall thickness difference detector | |
| CN210212403U (en) | Wireless measurer for wheel set tread runout of vehicle | |
| CN202814320U (en) | Concentricity detecting device | |
| CN203298686U (en) | Checking fixture for checking wall thickness difference of deep hole of shaft workpiece | |
| CN207952223U (en) | A kind of coiler pinch-roll roll gap calibration instruments of inspection | |
| CN202676064U (en) | Tooth ring radial direction bounce rapid detection apparatus | |
| CN203024707U (en) | Outer diameter and roundness detector for diamond compact | |
| CN203405147U (en) | Measuring tool specially used for detecting stand hole of iron seat | |
| CN202204495U (en) | Appearance test desk of wheelchair | |
| CN202432978U (en) | Device for detecting flatness of flat plate | |
| CN202869419U (en) | A device for checking the center distance of holes of an engine case of a motorcycle | |
| CN204988866U (en) | Wear -resisting ball strutting arrangement for hardness measurement | |
| CN204514225U (en) | Measure the device of cylinder jacket supporting shoulder and boss height | |
| CN102954779B (en) | A kind of appearance test desk of wheelchair |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090401 |