CN202511746U - Three-point fixed arc measuring instrument - Google Patents
Three-point fixed arc measuring instrument Download PDFInfo
- Publication number
- CN202511746U CN202511746U CN 201220107284 CN201220107284U CN202511746U CN 202511746 U CN202511746 U CN 202511746U CN 201220107284 CN201220107284 CN 201220107284 CN 201220107284 U CN201220107284 U CN 201220107284U CN 202511746 U CN202511746 U CN 202511746U
- Authority
- CN
- China
- Prior art keywords
- vernier
- main scale
- secondary chi
- locker
- spring
- 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
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Abstract
The utility model discloses a three-point fixed arc measuring instrument, which comprises a primary ruler and two secondary rulers, wherein one ends of the primary ruler and the two secondary rulers are connected together through a central shaft, and the other ends of the primary ruler and the two secondary rulers are measuring heads; a primary ruler vernier is arranged on the primary ruler; secondary ruler verniers are arranged on the two secondary rulers; and synchronous locking devices which are matched with each other are arranged on the primary ruler vernier and the secondary ruler verniers. The three-point fixed arc measuring instrument has the advantages that an arc is measured by using three measuring feet with the same length which extend from the same center of a circle according to the three-point circle setting principle, the three measuring feet with the same length are simultaneously contacted with optional three points which are coincided on the same arc, and when the conditions are met, the length value of the measuring feet is the radius of the arc. The three-point fixed arc measuring instrument is simple in structure and convenient to use, and the radius of the measured arc can be directly read without calculation.
Description
Technical field
The utility model relates to the large circular arc radius field of measuring technique, especially relates to a kind of three-point circle arc measuring instrument.
Background technology
It is the comparison of arc model that the now actual large circular arc radius that uses is measured what all adopt, can only judge that measured circular arc is whether in intended scope.Also having certain methods is just can obtain the result through calculating.And do not have easy and simple to handle, the direct surveying instrument of survey measurements.
The utility model content
The utility model has overcome shortcoming of the prior art, and a kind of three-point circle arc measuring instrument is provided.
The technical scheme of the utility model is: a kind of three-point circle arc measuring instrument, comprise a main scale and two secondary chis, and an end of main scale and secondary chi links together through central shaft, and the other end is a gauge head; Main scale is provided with the main scale vernier, on two secondary chis, is provided with secondary chi vernier; On main scale vernier and two secondary chi verniers, also be provided with the synchronous locking device that cooperatively interacts.
Said synchronous locking device comprises the locker that is arranged on the secondary chi vernier, is provided with shifting block at an end of locker, and locker is connected with secondary chi vernier through secondary chi spring, on locker, also is provided with spring leaf and the secondary chi friction piece that contacts with secondary chi; On main scale vernier and secondary chi vernier, be provided with and the corresponding bayonet socket of shifting block, also be provided with at the bayonet socket place of main scale vernier angled-lift splits and with the contacted main scale spring of angled-lift splits, below angled-lift splits, be provided with the main scale friction piece that contacts with main scale.
Said synchronous locking device comprises the locker that is arranged on the secondary chi vernier; End at locker is provided with shifting block; Locker is connected with secondary chi vernier through secondary chi spring; On main scale vernier and secondary chi vernier, be provided with and corresponding bayonet socket of shifting block and locking lever, be provided with and the corresponding bayonet socket of shifting block at an end of locking lever, the other end is provided with the friction piece that contacts with main scale or secondary chi; On main scale vernier and secondary chi vernier, also be provided with locking spring, an end of locking spring links to each other with main scale vernier or secondary chi vernier, the other end links to each other with the locking lever.
Compared with prior art; The utility model has the advantages that: the present invention is according to the three-point circle theorem: point-blank three points are not confirmed a circle; Use three same measurement of length pin that extend from the same center of circle to measure circular arc; Three same measurement of length pin simultaneously with same circular arc on do not overlap arbitrarily 3 contact, the length value of when satisfying condition, measuring pin is exactly the radius of circular arc.The utility model is simple in structure, and is easy to use; Method of operating is easy, quick, can directly read the arc radius of surveying, and need not through calculating.
Description of drawings
The utility model will explain through example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is the front view of measuring instrument when closing up state;
Fig. 2 is the front view of measuring instrument when open mode;
Fig. 3 is the embodiment one of the synchronous locking device of the utility model;
Fig. 4 is the embodiment two of the synchronous locking device of the utility model;
Fig. 5 is a synchronous locking device shown in Figure 4 synoptic diagram when being in locking state.
Embodiment
A kind of three-point circle arc measuring instrument like Fig. 1, shown in Figure 2, comprising: main scale 1 and two secondary chis 2, and an end of main scale and secondary chi links together through central shaft 7, and the other end is a gauge head, is used to contact measured circular arc; Main scale 1 is provided with main scale vernier 3, and reading can also be provided with LCD 6 on main scale vernier 3 for ease, on two secondary chis 2, is provided with secondary chi vernier 4; On main scale vernier 3 and two secondary chi verniers 4, also be provided with the synchronous locking device that cooperatively interacts; Synchronously the function of locking device is: when three chis (main scale and two secondary chis) when closing up, through opening synchronous locking device, make the same moved further of three chi verniers; Be used to adjust predetermined measurement value; And after adjusting, make synchronous locking device be recovered to locking state, and three chi verniers are fixed, can not move; When three chis separated, locking device maintained the lock status synchronously, and three chi verniers are fixed, and can not move.
The concrete structure of said synchronous locking device is as shown in Figure 3; Comprise: be arranged on the locker 31 on the secondary chi vernier; End at locker is provided with shifting block 33; Locker is connected with secondary chi vernier through secondary chi spring 32, on locker, also is provided with spring leaf 34 and secondary chi friction piece 35, and secondary chi friction piece 35 contacts with secondary chi 2; On main scale vernier and secondary chi vernier, be provided with and shifting block 33 corresponding bayonet sockets; Also be provided with at the bayonet socket place of main scale vernier angled-lift splits 37 and with the contacted main scale spring 36 of angled-lift splits; Below angled-lift splits 37, be provided with main scale friction piece 38, main scale friction piece 38 contacts with main scale 1.
When three chis close up; Press the locker of two secondary chi verniers; Shifting block 33 snaps in the bayonet socket of major and minor chi vernier, and angled-lift splits 37, the main scale spring 36 of pushing the main scale vernier open are compressed, and main scale friction piece 38 is released; Spring leaf 34 on the secondary chi vernier all is released with secondary chi friction piece 35 simultaneously, and three verniers move simultaneously; When discharging locker (shifting block 33 withdraws from from the bayonet socket of main scale); Main scale spring 36 resets, promotes angled-lift splits 37 translations, compresses main scale friction piece 38, simultaneously secondary chi spring 32 also reset, clamping leaf spring 34 and secondary chi friction piece 35; Three verniers are locked, and all can not move.At this moment separate major and minor chi and begin to measure, the locker friction piece maintains the lock status.
The concrete structure of said synchronous locking device can also be as shown in Figure 4; Comprise: be arranged on the locker 41 on the secondary chi vernier; End at locker is provided with shifting block 43, and locker is connected with secondary chi vernier through secondary chi spring 42, on main scale vernier and secondary chi vernier, is provided with and shifting block 43 corresponding bayonet sockets; On main scale vernier and secondary chi vernier, be provided with the locking lever 46 corresponding with shifting block 43; End at locking lever 46 is provided with and shifting block 43 corresponding bayonet sockets, and the other end is provided with friction piece 45, and friction piece 45 contacts with main scale 1 or secondary chi 2; On main scale vernier and secondary chi vernier, also be provided with locking spring 44, an end of locking spring 44 links to each other with main scale vernier or secondary chi vernier, the other end links to each other with the locking lever.
When three chis close up, press the locker of two secondary chis, shifting block 43 snaps in the bayonet socket of main scale, pushes major and minor chi locking lever open, discharges major and minor chi friction piece, and at this moment three verniers move simultaneously; As shown in Figure 5, when discharging locker (shifting block 43 withdraws from from the bayonet socket of main scale), secondary chi spring 42 and locking spring 44 on two secondary chi verniers all reset, major and minor chi locking lever pressing friction body, and three verniers are locked, and all can not move.At this moment separate major and minor chi and begin to measure, the locker friction piece maintains the lock status.
Can also adopt mechanisms such as cam, torsion spring to realize synchronous locking.
Claims (3)
1. three-point circle arc measuring instrument is characterized in that: comprising: a main scale and two secondary chis, and an end of main scale and secondary chi links together through central shaft, and the other end is a gauge head; Main scale is provided with the main scale vernier, on two secondary chis, is provided with secondary chi vernier; On main scale vernier and two secondary chi verniers, also be provided with the synchronous locking device that cooperatively interacts.
2. three-point circle arc measuring instrument according to claim 1; It is characterized in that: said synchronous locking device comprises the locker that is arranged on the secondary chi vernier; End at locker is provided with shifting block; Locker is connected with secondary chi vernier through secondary chi spring, on locker, also is provided with spring leaf and the secondary chi friction piece that contacts with secondary chi; On main scale vernier and secondary chi vernier, be provided with and the corresponding bayonet socket of shifting block, also be provided with at the bayonet socket place of main scale vernier angled-lift splits and with the contacted main scale spring of angled-lift splits, below angled-lift splits, be provided with the main scale friction piece that contacts with main scale.
3. three-point circle arc measuring instrument according to claim 1; It is characterized in that: said synchronous locking device comprises the locker that is arranged on the secondary chi vernier; End at locker is provided with shifting block, and locker is connected with secondary chi vernier through secondary chi spring, on main scale vernier and secondary chi vernier, is provided with and corresponding bayonet socket of shifting block and locking lever; End at the locking lever is provided with and the corresponding bayonet socket of shifting block; The other end is provided with the friction piece that contacts with main scale or secondary chi, on main scale vernier and secondary chi vernier, also is provided with locking spring, and an end of locking spring links to each other with main scale vernier or secondary chi vernier, the other end links to each other with the locking lever.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220107284 CN202511746U (en) | 2012-03-21 | 2012-03-21 | Three-point fixed arc measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220107284 CN202511746U (en) | 2012-03-21 | 2012-03-21 | Three-point fixed arc measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202511746U true CN202511746U (en) | 2012-10-31 |
Family
ID=47064226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220107284 Expired - Fee Related CN202511746U (en) | 2012-03-21 | 2012-03-21 | Three-point fixed arc measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202511746U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589396A (en) * | 2012-03-21 | 2012-07-18 | 中铁隆昌铁路器材有限公司 | Three-point identifying arc measuring instrument and measuring method |
| CN110030936A (en) * | 2019-03-28 | 2019-07-19 | 唐山百川智能机器股份有限公司 | Non-contact type locomotive wheel diameter measuring device |
| CN110953971A (en) * | 2019-12-17 | 2020-04-03 | 燕山大学 | Device for rapidly measuring bending degree of plate |
-
2012
- 2012-03-21 CN CN 201220107284 patent/CN202511746U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589396A (en) * | 2012-03-21 | 2012-07-18 | 中铁隆昌铁路器材有限公司 | Three-point identifying arc measuring instrument and measuring method |
| CN102589396B (en) * | 2012-03-21 | 2014-02-26 | 中铁隆昌铁路器材有限公司 | Three-point identifying arc measuring instrument and measuring method |
| CN110030936A (en) * | 2019-03-28 | 2019-07-19 | 唐山百川智能机器股份有限公司 | Non-contact type locomotive wheel diameter measuring device |
| CN110953971A (en) * | 2019-12-17 | 2020-04-03 | 燕山大学 | Device for rapidly measuring bending degree of plate |
| CN110953971B (en) * | 2019-12-17 | 2021-04-16 | 燕山大学 | Device for rapidly measuring bending degree of plate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121031 Termination date: 20180321 |