CN203881234U - Special thread micrometer - Google Patents
Special thread micrometer Download PDFInfo
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- CN203881234U CN203881234U CN201420267365.6U CN201420267365U CN203881234U CN 203881234 U CN203881234 U CN 203881234U CN 201420267365 U CN201420267365 U CN 201420267365U CN 203881234 U CN203881234 U CN 203881234U
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- thread
- screw
- micrometric screw
- micrometer
- milscale
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- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The utility model relates to a length measuring instrument which is used for carrying out dimension measurement based on a screw pair principle, such as micrometer. A special thread micrometer comprises a micrometric screw provided with external threads and a threaded shaft sleeve which is provided with internal threads and screwed with the micrometric screw, and is mainly characterized in that the width W of a tooth crest is as 0.333 to 0.745 times as the thread pitch P. The special thread micrometer has the advantages that the adopted thread form has wider tooth crest width, shallower groove, fewer cutting quantity and higher processing efficiency when compared with the form of standard threads. The micrometer adopting the thread form can enlarge the thread pitch size when reducing the depth of meter grooves, so that the axial moving speed of the micrometric screw of the micrometer is accelerated, the measurement is more convenient, and the special thread micrometer has good precision stability and precision retainability.
Description
technical field
The utility model relates to a kind of length measuring device that carries out dimensional measurement by screw pair principle, as milscale.
background technology
Existing milscale comprises female threaded sleeve and has externally threaded micrometric screw, utilize screw pair principle, rotation micrometric screw moves axially micrometric screw, by measuring its axial displacement of angle calculation of micrometric screw rotation, thereby measured size is carried out to the measuring appliance of reading.The form of thread of micrometric screw generally adopts basic-profile and the size (Fig. 1) of common pitch, the form of thread height H of micrometric screw
d=7/8x0.866P=0.758P, facewidth W=P/8, the height of thread profile meets the national standard (GB/T 192-2003 and GB/T 196-2003) of STRTHD thread form and size, and this standard belongs to the universal standard, is applicable to the screw thread that various occasions are used.The modal thread pitch of milscale is 0.5mm or 0.635mm, that is to say that micrometric screw revolves that turn around can only mobile 0.5mm or 0.635mm, and pace is very slow.If raising measuring speed, just must select larger pitch, but STRTHD is along with the increase of pitch, the height of tooth form is corresponding increase also, whole spiral is paid size and will be increased, and is not suitable for milscale and adopts, because milscale is the hand-held survey instrument that a kind of production scene is used, volume can not be too large, and the diameter dimension of micrometric screw is limited for this reason.In addition, in the time that the thread height of screw thread increases, the cutting output of machining also increases thereupon, and working (machining) efficiency is low, and processing cost is high.Therefore the standard thread form of coarse pitch milscale employing STRTHD is not preferred plan.
Address this problem, can adopt nonstandard special thread form, reduce form of thread height, because the threaded function of milscale is that the rotation of micrometric screw is converted to and moved axially, do not connect and fastening effect, do not have strength problem.Patent CN1798955A has proposed a scheme: the pitch of micrometric screw is more than or equal to 2 times of difference of major diameter of thread and internal diameter, and the external diameter of screw thread and the difference of internal diameter are less than or equal to 1/5th of external diameter.By this scheme, pitch P>=2 (major diameter of thread-core diameter of thread)=4H of micrometric screw
d, i.e. form of thread height H
d≤ 0.25P.This scheme has greatly reduced form of thread height, although be suitable for coarse pitch milscale, but due to form of thread height reduce with the increase of pitch make screw thread screw tooth number reduce, for example, for the milscale of 2mm pitch, the tooth number that its screw thread screws is that the screw thread of 0.5mm pitch screws 1/4th of tooth number, and the area that screws of milscale screw pair is greatly reduced, and this can have influence on precision stability and the precision stability of milscale.
summary of the invention
The purpose of this utility model is to make up the deficiencies in the prior art part and a kind of special thread milscale is provided.Form of thread of the present utility model, its measuring accuracy and measuring speed and working (machining) efficiency are taken into account, and it can use coarse pitch, and translational speed is fast, and thread height is little, and it is reasonable that screw thread screws area, and precision meets the demands, and is beneficial to processing, and cost is low.
The utility model solves the technical scheme that its technical matters adopts: a kind of special thread milscale, comprise the female threaded sleeve of the tool that has externally threaded micrometric screw and screw with it, its principal feature is 0.333 times to 0.745 times that the tooth top width W of screw thread is pitch P.
Described special thread milscale, also include with the scale casing of groove and be fixed on described threaded sleeve, microdrum with groove rotates and moves axially with described micrometric screw, determines the axial displacement of micrometric screw by the groove reading on scale casing and microdrum.
Described special thread milscale, fixation of sensor is fixed on described threaded sleeve, rotation sensor rotates with described micrometric screw, electronic digital display apparatus is located on chi frame, electronic digital display apparatus is measured the angle of rotation sensor rotation and is converted into the axial displacement of micrometric screw, is showing screen display.
The beneficial effects of the utility model are: the form of thread that the utility model adopts is compared with the tooth form of standard thread, and addendum width is large, and dental groove is shallow, and cutting output is few, and working (machining) efficiency is high.Adopt the milscale of this thread profile, in reducing chi trench depth, can also increase pitch dimension, make milscale micrometric screw the speed that moves axially accelerate, measure more convenient, and, also have good precision stability and precision stability.
brief description of the drawings
The basic-profile schematic diagram of Fig. 1 STRTHD;
The special thread tooth form schematic diagram of Fig. 2 the utility model micrometric screw;
The master of the practical example 1 of Fig. 3 the utility model looks cut-open view;
The master of the practical example 2 of Fig. 4 the utility model looks cut-open view.
embodiment
Be described in further detail below in conjunction with the preferred example shown in accompanying drawing:
Embodiment 1: see Fig. 2, Fig. 3, a kind of special thread milscale, comprises the female threaded sleeve 4 of the tool that has externally threaded micrometric screw 2 and screw with it, tooth top width W is pitch P 0.333 times.
The described scale casing 5 with groove is fixed on described threaded sleeve, microdrum 6 with groove rotates and moves axially with described micrometric screw 2, by 6 groove reading on scale casing 5 and microdrum being determined to the axial displacement of micrometric screw 2.
Embodiment 2: see Fig. 2, Fig. 4, a kind of special thread milscale, comprises the female threaded sleeve 18 of the tool that has externally threaded micrometric screw 9 and screw with it, tooth top width W is pitch P 0.333 times.
Described fixation of sensor 16 is fixed on described threaded sleeve 18, rotation sensor 15 is with 9 rotations of described micrometric screw, electronic digital display apparatus 23 is located on chi frame, electronic digital display apparatus 23 is measured the angle that rotation sensor 15 rotates the axial displacement that is converted into micrometric screw 9, is showing screen display.
Embodiment 3: see Fig. 2, Fig. 3, a kind of special thread milscale, comprises the female threaded sleeve 4 of the tool that has externally threaded micrometric screw 2 and screw with it, tooth top width W is pitch P 0.745 times.
The described scale casing 5 with groove is fixed on described threaded sleeve 4, microdrum 6 with groove rotates and moves axially with described micrometric screw 2, by the groove reading on scale casing 5 and microdrum 6 being determined to the axial displacement of micrometric screw 2.
Embodiment 4: see Fig. 2, Fig. 4, a kind of special thread milscale, comprises the female threaded sleeve 18 of the tool that has externally threaded micrometric screw 9 and screw with it, tooth top width W is pitch P 0.745 times.
Described fixation of sensor 16 is fixed on described threaded sleeve 18, rotation sensor 15 is with 9 rotations of described micrometric screw, electronic digital display apparatus 23 is located on chi frame, electronic digital display apparatus 23 is measured the angle that rotation sensor 15 rotates the axial displacement that is converted into micrometric screw 9, is showing screen display.
Embodiment 5: see Fig. 2, Fig. 3, a kind of special thread milscale, comprises the female threaded sleeve 4 of the tool that has externally threaded micrometric screw 2 and screw with it, tooth top width W is pitch P 0.539 times.
The described scale casing 5 with groove is fixed on described threaded sleeve 4, microdrum 6 with groove rotates and moves axially with described micrometric screw 2, by the groove reading on scale casing 5 and microdrum 6 being determined to the axial displacement of micrometric screw 2.
Embodiment 6: see Fig. 2, Fig. 4, a kind of special thread milscale, comprises the female threaded sleeve 18 of the tool that has externally threaded micrometric screw 9 and screw with it, tooth top width W is pitch P 0.539 times.
Described fixation of sensor solid 16 fixes on described threaded sleeve 18, rotation sensor 15 is with 9 rotations of described micrometric screw, electronic digital display apparatus 23 is located on chi frame, electronic digital display apparatus 23 is measured the angle that rotation sensor 15 rotates the axial displacement that is converted into micrometric screw 9, is showing screen display.
In the time that the tooth top width of micrometric screw form of thread is W=0.539P, form of thread height H
dfor 0.399P, it is much smaller than standard thread thread form height 0.758P, and dental groove is shallow, and cutting output is few, and working (machining) efficiency is high, and is greater than the maximum height 0.25P of the thread profile described in patent CN1798955A, has good precision stability and precision stability.
The utility model can be on the milscale of 0.5mm, 1mm or 2mm for pitch, and micrometric screw often revolves to turn around and can move axially 0.5mm, 1mm or 2mm.The utility model can be used on outside micrometer, also can be used on the length measuring device of micrometer inside caliper, micrometric depth gauge, the first-class various use screw pairs of differential, can also be used on corresponding electronic microcalliper.
Practical example 1: see Fig. 2, Fig. 3, the utility model is in the outer application through milscale of mechanical structure.Chi frame 3 left ends are provided with gage button 1, chi frame 3 right-hand members are provided with fixing threaded sleeve 4, and threaded sleeve 4 endoporus left ends are unthreaded holes, and right-hand member has internal thread, the same left end of micrometric screw 2 is polished rod, interlude is external thread, and right-hand member has a cone, and micrometric screw 2 is arranged in threaded sleeve 4, polished rod coordinates with the unthreaded hole of threaded sleeve, external thread engages with the internal thread of threaded sleeve, and the pitch of micrometric screw 2 is 1mm, tooth top width W=0.539P.The reading device that scale casing 5 and microdrum 6 form is installed outside threaded sleeve 4, scale casing 5 is fixed on the cylindrical of threaded sleeve 4, on scale casing 5 external cylindrical surfaces, be carved with an axial scale mark, also have the short groove vertical with axial groove at interval of 1mm, the cone of the conical bore of microdrum 6 right-hand members and micrometric screw 2 right-hand members closely cooperates and fixes, on microdrum 6 circumference, be evenly carved with 100 segmentation scale marks, because microdrum 6 micrometric screw 2 that often turns around moves 1mm, so the corresponding micrometric screw 2 of a scale interval on microdrum 6 moves 0.01mm, micrometric screw 2 afterbodys are also provided with device for measuring force 7, when use, testee is placed between gage button 1 and the measurement face of micrometric screw 2, rotation device for measuring force 7 bands rotate microdrum 6 and micrometric screw 2 synchronous rotaries, make micrometric screw 2 axial displacements by screw pair principle, the measurement face of making is with constant ergometry contact testee, then on scale casing 5 and microdrum 6, read the accurate dimension of testee.
Practical example 2: see Fig. 2, Fig. 4 the utility model application at the milscale of electronic digital display structure.The pitch of micrometric screw 9 is 2mm, gage button 8 is fixed on the left end of chi frame 11, chi frame 11 right-hand members have the cavity of an installation digital display device 23, one supporting sleeve 10 is installed in cavity left end circular hole, in supporting sleeve 10, there is adjusting sleeve 12, be used for adjusting the gap between sensor, adjusting sleeve 12 right-hand members are dynamic grid bases 13, the right-hand member of dynamic grid base 13 is installed rotation sensor 15, an awl-end screw 14 is housed on the face of cylinder of dynamic grid base 13, threaded sleeve 18 is installed in the circular hole of chi frame 11 cavity right-hand members, in threaded sleeve 18 left end endoporus, fix a fixed grid base 17, fixation of sensor 16 is fixed on the left end of fixed grid base 17, on the face of cylinder of threaded sleeve 18, be fixed with fixed muffle 19, outer installation one microdrum 20 of fixed muffle 19, dynamometry overcoat 22 is installed on the cylindrical of microdrum 20, they are clearance fit, between dynamometry overcoat 22 endoporus and the cylindrical of microdrum 20, there is a dynamometry reed 21, microdrum 20 right-hand members have a conical bore, coordinate and fix with the circular conical surface of micrometric screw 9 afterbodys, the threaded portion of micrometric screw 9 engages with the internal thread of threaded sleeve 18, on the polished rod of micrometric screw 9, there is a V-type groove, awl-end screw 14 on dynamic grid base 13 can make dynamic grid base 13 with micrometric screw 9 synchronous rotaries and slide in V groove, screw 24 both can have been fixed microdrum 20 can also make dynamometry overcoat 22 can not deviate from from microdrum 20, tooth top width W=0.539P.
When measurement, testee is placed between gage button 8 and the measurement face of micrometric screw 9, rotate dynamometry overcoat 22, drive microdrum 20 and micrometric screw 9 by dynamometry reed 21, dynamic grid base 13, rotation sensor 15 rotates together and micrometric screw 9 is moved vertically, the measurement face of making is with constant ergometry contact testee, rotation sensor 15 and fixation of sensor 16 in relative rotation electric signal are input to electronic digital display apparatus 23, (for example calculate the corresponding axial displacement of micrometric screw 9 anglecs of rotation, the pitch of micrometric screw 9 is 2mm, it is 10.8 ' that micrometric screw 9 moves the angle that rotation sensor 15 that 0.001mm is corresponding rotates), then displacement namely the size of testee be presented on the display screen of electronic digital display apparatus 23.
Claims (3)
1. a special thread milscale, comprises the female threaded sleeve of the tool that has externally threaded micrometric screw and screw with it, the tooth top width W that it is characterized in that screw thread is pitch P 0.333 times to 0.745 times.
2. special thread milscale as claimed in claim 1, characterized by further comprising with the scale casing of groove and be fixed on described threaded sleeve, microdrum with groove rotates and moves axially with described micrometric screw, determines the axial displacement of micrometric screw by the groove reading on scale casing and microdrum.
3. special thread milscale as claimed in claim 1, it is characterized in that fixation of sensor is fixed on described threaded sleeve, rotation sensor rotates with described micrometric screw, electronic digital display apparatus is located on chi frame, electronic digital display apparatus is measured the angle of rotation sensor rotation and is converted into the axial displacement of micrometric screw, is showing screen display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420267365.6U CN203881234U (en) | 2014-05-23 | 2014-05-23 | Special thread micrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420267365.6U CN203881234U (en) | 2014-05-23 | 2014-05-23 | Special thread micrometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203881234U true CN203881234U (en) | 2014-10-15 |
Family
ID=51681722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420267365.6U Expired - Fee Related CN203881234U (en) | 2014-05-23 | 2014-05-23 | Special thread micrometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203881234U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109297379A (en) * | 2018-11-19 | 2019-02-01 | 台山核电合营有限公司 | A kind of size screw thread micrometer automatic verification system |
| CN110793420A (en) * | 2019-10-23 | 2020-02-14 | 山东理工大学 | High-precision position positioning device based on spiral micrometering principle |
| CN109297379B (en) * | 2018-11-19 | 2024-05-31 | 台山核电合营有限公司 | Automatic verification system for large-size screw micrometer |
-
2014
- 2014-05-23 CN CN201420267365.6U patent/CN203881234U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109297379A (en) * | 2018-11-19 | 2019-02-01 | 台山核电合营有限公司 | A kind of size screw thread micrometer automatic verification system |
| CN109297379B (en) * | 2018-11-19 | 2024-05-31 | 台山核电合营有限公司 | Automatic verification system for large-size screw micrometer |
| CN110793420A (en) * | 2019-10-23 | 2020-02-14 | 山东理工大学 | High-precision position positioning device based on spiral micrometering principle |
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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: 20141015 |