CN2413263Y - Screw-thread vernier micrometer - Google Patents
Screw-thread vernier micrometer Download PDFInfo
- Publication number
- CN2413263Y CN2413263Y CN 00217041 CN00217041U CN2413263Y CN 2413263 Y CN2413263 Y CN 2413263Y CN 00217041 CN00217041 CN 00217041 CN 00217041 U CN00217041 U CN 00217041U CN 2413263 Y CN2413263 Y CN 2413263Y
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- China
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- socket
- horizontal line
- vernier
- differential sleeve
- millimeter
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- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
The utility model relates to a vernier type screw micrometer, which is a precise measuring tool for measuring the length. A screw nut sleeve of an original screw micrometer is upward uniformly provided with 50 additional horizontal lines that begin from the original horizontal lines, and the distance between the increased fiftieth horizontal line and the original horizontal line is equal to the corresponding distance, which is on the screw nut sleeve, of the maximum scale on a differential sleeve, so that the relative rotation of the screw nut sleeve and the differential sleeve is similar to the relative movement between a vernier of a vernier caliper and a main ruler, and the improved screw micrometer has the additional function of a vernier. The utility model has the advantages of simple structure, convenient operation and maintenance, and high measuring accuracy which is 20 times higher than that of an unimproved screw micrometer.
Description
The utility model relates to a kind of precision measuringtoll that length is used of measuring.
Measurer is an indispensable instrument among the human lives, can divide ordinary measring tool such as meter ruler and precision measuringtoll such as vernier caliper, screw-thread micrometer, measuring microscope, optical comparator and interferometer etc.What generally use in the precision measuringtoll at present, is vernier caliper and screw-thread micrometer.
Wherein, vernier caliper by main scale be attached to main scale on, and can be relative the vernier of main scale slip form.The equal in length of the length of the N that is provided with on the vernier calibration lattice and the N-1 on a main scale calibration lattice, if minimum division value is a on the main scale, minimum division value b=(N-1) a/N on the vernier so.On the main scale on minimum division value a and the vernier difference of minimum division value b be called the vernier accuracy value, it is a-b=a-(N-1) a/N=a/N.According to minimum division value on the main scale of vernier caliper is the a=1 millimeter, has N=50 calibration lattice to calculate on the vernier, and then the vernier accuracy value is 1 a millimeter/50=0.02 millimeter.When " 0 " of scale mark in the foremost of vernier (being called the 0th scale mark) and main scale when line aligns, the scale mark at 49 millimeters places aligns on the last item scale mark on the vernier (i.e. the 50th scale mark) and the main scale, and the distance between the 1st scale mark on this moment vernier and the scale mark at 1 millimeter place on the main scale is 0.02 millimeter.On the vernier on the 5th scale mark and the main scale spacing of the scale mark at 5 millimeters places be 0.02 millimeter * 5=0.10 millimeter.And the like, when vernier moves right, when the scale mark at 10 millimeters places alignd on the 10th scale mark that makes vernier and the main scale, the spacing of the 0th scale mark and main scale " 0 " line was 0.02 a millimeter * 10=0.20 millimeter on the vernier.For the ease of direct reading, be marked with printed words such as 0,1,2,3,4,5,6,7,8 and 9 at the 0th, 5,10,15,20,25,30,35,40 and 45 line of vernier, expression is when these lines of vernier align with the arbitrary scale mark of main scale, and the distance between the 0th scale mark (promptly indicating the scale mark of " 0 ") of vernier and the main scale scale mark of its front is respectively 0.00,0.10,0.20,0.30 ... 0.90 millimeter.In a word, the number reading method of vernier caliper is: read integer scale value (millimeter) corresponding with vernier " 0 " scale mark on the main scale earlier, read the numerical value of 1 millimeter of less than again from vernier, reading is the main scale reading and adds vernier reading.If a main scale scale mark of vernier " 0 " scale mark front is 21, the scale mark at 2.4 places on the vernier aligns with the main scale scale mark, and then the main scale reading is 21 millimeters, and vernier reading is 0.24 millimeter, and the measurement result number is 21+0.24 millimeter=21.24 millimeter.Generally speaking, the measuring accuracy of vernier caliper is 0.02 millimeter.
Wherein, screw-thread micrometer is formed by measuring screw rod, ut socket, differential sleeve (pivotable sleeve), ratchet, set lever (claiming detent again), measurement rig floor and shelf.The shelf left end is connected with the measurement rig floor, and the shelf right-hand member is connected with ut socket.The right-hand member that passes the measurement screw rod that ut socket is connected with the differential sleeve is that a pitch is 0.5 millimeter screw rod, and the screw thread with the screw flight coupling is arranged in the ut socket.The tube of ut socket has a horizontal line on the face, and being carved with the scale division value vertical with horizontal line respectively at the upper and lower of horizontal line is 1 millimeter scale mark, and the spacing of neighbouring two scale marks is 0.5 millimeter.Be carved with 50 lattice calibration on the front edge of differential sleeve tube face.When the differential sleeve rotates, drive the measurement screw rod and move to the left or to the right.Make the differential sleeve rotate a circle, measure screw rod and just move 0.5 millimeter (because pitch is 0.5 millimeter).So differential sleeve revolution moves a lattice, measure screw rod and just move 0.5 millimeter ÷ 50=0.01 millimeter.The measurement result of screw-thread micrometer adds to estimate reads to measure 0.001 millimeter.The instrument error of the one-level screw-thread micrometer that the laboratory is commonly used is 0.004 millimeter, and promptly its precision is 0.004 millimeter.
But when some processing and detection required measuring accuracy more accurately, specifically, when measuring accuracy need reach more than 0.004 millimeter, vernier caliper and screw-thread micrometer just can not meet the demands.Though and measuring microscope, optical comparator and interferometer can satisfy measuring accuracy, its price is very expensive, uses very trouble, also difficult maintenance.
The purpose of this utility model is that design a kind ofly can be brought up to measuring accuracy 0.0002 millimeter effectively, and cheap, uses survey instrument easy to maintenance.In order to achieve the above object, the utility model is realized by following scheme.It comprises measures screw rod, ut socket, differential sleeve, ratchet, set lever, fixation measuring rig floor and shelf, shelf left end intrinsic gauging rig floor, the intrinsic ut socket of right-hand member, the right-hand member that passes the measurement screw rod that ut socket is connected with the differential sleeve is that a pitch is 0.5 millimeter screw rod, screw thread with the screw flight coupling is arranged in the ut socket, on the tube face of ut socket a horizontal line is arranged, being carved with the scale division value vertical with horizontal line respectively at the upper and lower of horizontal line is 1 millimeter scale mark, and the distance between neighbouring two scale marks is 0.5 millimeter.Be carved with 50 lattice calibration on the front edge of differential sleeve tube face.When the differential sleeve rotates, drive the measurement screw rod and move to the left or to the right, make the differential sleeve rotate a circle, measure screw rod and just move 0.5 millimeter.So differential sleeve revolution moves a lattice, measure screw rod and just move 0.01 millimeter.Its structural feature is the drum surface at ut socket, from original horizontal line, upwards increase by 50 horizontal lines equably, and make distance between the 50th horizontal line being increased and the original horizontal line equal minimum calibration pairing distance on ut socket on the differential sleeve.
So-called the 50th horizontal line that increases is meant in pairing distance on the ut socket with the minimum calibration that distance between the original horizontal line equals on the differential sleeve: the minimum calibration on the fan-shaped angle that the distance between the 50th horizontal line that is increased on the ut socket and the original horizontal line forms the center of circle of the xsect of ut socket and the differential sleeve equates that to the fan-shaped angle of the center of circle formation of the xsect of differential sleeve just different arc has same fan clevis angle to the same center of circle on the varying cross-section.
Like this, increase relatively rotating with regard to relatively moving between the vernier of similar vernier caliper and the main scale of ut socket after the improvement of 50 horizontal lines and differential sleeve, ut socket is equivalent to vernier, and the differential sleeve is equivalent to main scale.
Great advantage of the present utility model is: also increased the function of vernier through improved screw-thread micrometer except that the function of not improved screw-thread micrometer own, make measuring accuracy improve 20 times than not improved screw-thread micrometer, and simple in structure, cheap, easy to use.Specifically, only need be on the tube face of the ut socket of former screw-thread micrometer, from original horizontal line, upwards increase by 50 horizontal lines equably, and make distance between the 50th horizontal line being increased and the original horizontal line equal minimum calibration pairing distance on ut socket on the differential sleeve, just can make relatively rotating of ut socket and differential sleeve with regard to relatively moving between the vernier of similar vernier caliper and the main scale.When survey measurements, adopt earlier and read the conventional following two-decimal of millimeter, then at the 3rd and the 4th decimal of reading between horizontal line that is increased that plays the vernier effect and the differential sleeve below the follow-up millimeter from screw-thread micrometer.
Accompanying drawing is embodiment of the present utility model, wherein
Fig. 1 is a structural representation of the present utility model
Fig. 2 is differential sleeve of the present utility model and improved ut socket scale distribution enlarged diagram
Fig. 3 is the A-A cut-open view of Fig. 2
The utility model will be further described in conjunction with the accompanying drawings
See also Fig. 1 and Fig. 2, the utility model is formed by measuring anvil 1, measurement screw rod 2, ut socket 3, differential sleeve 4, ratchet 5, set lever 6 and shelf 7.One end intrinsic gauging rig floor 1 of shelf 7, there is the ut socket 3 of through hole at the intrinsic center of the other end, the screw thread that is provided with in ut socket 3 holes mates with the screw thread that measurement screw rod 2 right-hand member surfaces are provided with, its pitch all is 0.5 millimeter, the measurement screw rod 2 that is solidified as a whole with differential sleeve 4 can be in ut socket 3 left-right rotation, promptly, encloses by differential sleeve 4 when rotating one, drive and measure mobile 0.5 millimeter to the left or to the right of screw rod 2, the 50 lattice calibration that are carved with on the front edge of 4 faces of differential sleeve, so differential sleeve 4 revolutions move a lattice, measure screw rod 2 and just move 0.01 millimeter.That an original horizontal line on the circumference of ut socket 3, the upper and lower of horizontal line are carved with respectively is vertical with horizontal line, scale division value is 1 millimeter scale mark, and the spacing of neighbouring two scale marks is 0.5 millimeter, and is identical with the pitch of measuring screw rod 2.On the drum surface of ut socket 3, from original horizontal line, upwards increase by 50 horizontal lines equably, and make the distance between the 50th horizontal line being increased and the original horizontal line equal minimum calibration pairing distance on ut socket 3 on the differential sleeve 4.
See also Fig. 3, so-called the 50th horizontal line that increases equals with distance between the original horizontal line that minimum calibration is meant in pairing distance on the ut socket 3 on the differential sleeve 4: increase minimum calibration D on the fan-shaped angle that the center of circle of the xsect of ut socket 3 is formed apart from d and the differential sleeve 4 between the 50th horizontal line and the original horizontal line on the ut socket 3 the fan-shaped angle that the center of circle of the xsect of differential sleeve 4 forms is equated that different arc is identical to the fan-shaped angle of same center of circle formation on just above-mentioned two xsects.Above-mentioned design comes between ut socket 3 and the differential sleeve 4 scale surfaces gapped 8.Form relatively moving between the vernier that relatively rotates similar vernier caliper of ut socket 3 that has increased by 50 horizontal lines of the present utility model and differential sleeve 4 and the main scale, ut socket 3 is equivalent to vernier, and differential sleeve 4 is equivalent to main scale.Therefore, must satisfy the gap requirement of rotating simultaneously, the distance between the 50th horizontal line that is just increased on the distance of minimum calibration and the ut socket 3 on the differential sleeve 4 and the original horizontal line is wanted correspondent equal.
Because the little calibration of each lattice of the 50 lattice calibration that are carved with on the front edge tube face of differential sleeve 4 is represented 0.01 millimeter, so the vernier accuracy value between the ut socket 3 after differential sleeve 4 and the improvement is 0.01 millimeter-0.01 millimeter * [(50-1) ÷ 50]=0.01 millimeter/50=0.0002 millimeter.During measurement, reversing ratchet 5, object under test is put between measurement anvil 1 and the measurement screw rod 2, and then positive dirction rotating ratchet 5, when hearing " cough up, cough up ... " sound (show object under test has been sandwiched in measure between anvil 1 and the measurement screw rod 2) stop operating, the fixing and locking handle 6 then, in case during mobile the utility model, measurement screw rod 2 also produces with respect to shelf 7 and moves, thereby influences reading; Then the first step is read the scale value (noting half millimeter scale mark) that is not covered by the forward position of differential sleeve 4 on the ut socket 3 earlier, second step was read the reading (i.e. millimeter following two-decimal) on the differential sleeve 4 that the former horizontal line on the ut socket 3 aims at again, the 3rd step was a numerical value of reading the scale mark of aiming at certain scale mark on the differential sleeve 4 on the ut socket 3, because the vernier accuracy value is 0.0002 millimeter, so the reading at aligning place is the bar number of 0.0002 * horizontal line, last measurement result is a first step reading, the second step reading and the 3rd step reading sum with regard to measurement result shown in Figure 2 are: 20.5+0.40+0.0006 millimeter (former horizontal line up number aims at differential sleeve 4 certain scale mark be the 3rd horizontal line that is increased on the ut socket 3)=20.9006 millimeters.For the ease of reading, the original horizontal line of ut socket 3 is counted " 0 " scale mark, the 1st horizontal line that is up increased is " 2 " scale mark, article 2, horizontal line is " 4 " scale mark, and the like, article 50, horizontal line, one that is below the former horizontal line is " 100 " scale mark, the utility model one-level screw-thread micrometer measuring accuracy more used than former laboratory improved 20 times for 0.004 millimeter.
In addition, the utility model in use for some time, also can change zero point, so must write down initial reading earlier when measuring.Concrete grammar is: measuring anvil 1 and measuring between the screw rod 2 and do not put into any object, rotation ratchet 5 stops operating when the sound of hearing " cough up, cough up ... "." 0 " scale mark is not necessarily aimed at former horizontal line on the ut socket 3 on the differential sleeve 4 at this moment.The reading that aim at this moment is an initial reading.It should be noted that initial reading has positive and negative branch, and the final reading of Measuring Object length should deduct initial reading with the measurement result that above-mentioned 3 steps obtain.
In order to reach the purpose that improves precision, must when making screw-thread micrometer of the present utility model, improve the accuracy of distance between the screw thread, and the cooperate degree between the negative and positive screw thread.
Because the scale mark on the ut socket 3 is closeer, adjacent scale mark can be coated with different colors when making, and is beneficial to obtain making things convenient for reading.
Claims (3)
1. screw-thread micrometer with vernier, comprise and measure anvil (1), measure screw rod (2), ut socket (3), differential sleeve (4), ratchet (5), set lever (6), and shelf (7), the left end of shelf (7) is connected with measurement anvil (1), its right-hand member is connected with ut socket (3), the right-hand member of the measurement screw rod (2) that passes ut socket (3) and be connected with differential sleeve (4) is that a pitch is 0.5 millimeter screw rod, the internal thread of ut socket (3) and the external thread coupling of measuring screw rod (2), a horizontal line is arranged on the circumference of ut socket (3), on horizontal line, it is 1 millimeter scale that the below is carved with the scale division value vertical with horizontal line respectively, and the spacing between neighbouring two scale marks is 0.5 millimeter; Be carved with 50 lattice calibration on the front edge of differential sleeve (4) tube face, make differential sleeve (4) rotate a circle, measure screw rod (2) and just move 0.5 millimeter, differential sleeve (4) revolution moves a lattice, measure screw rod (2) and just move 0.01 millimeter, it is characterized in that: on the circumference of ut socket (3), from original horizontal line, upwards increase by 50 horizontal lines equably, and the distance between the 50th horizontal line that is increased and the original horizontal line equals differential sleeve (4) and goes up minimum calibration and go up pairing distance at ut socket (3); Increased relatively rotating of the ut socket (3) of 50 horizontal lines and differential sleeve (4) with regard to relatively moving between the vernier of similar vernier caliper and the main scale, ut socket (3) is equivalent to vernier, differential sleeve (4) is equivalent to main scale, " 0 " scale mark of vernier is the original horizontal line of ut socket (3), up the 1st horizontal line is " 2 " scale mark, and the 2nd is " 4 " scale mark, and the like, article 50,, below the promptly former horizontal line is " 100 " scale mark.
2. a kind of screw-thread micrometer with vernier according to claim 1 is characterized in that: described the 50th horizontal line and distance between the original horizontal line equal differential sleeve (4) and go up minimum calibration and go up pairing distance at ut socket (3) and be meant: the distance between last the 50th horizontal line of ut socket (3) and the original horizontal line equates the fan-shaped angle of the minimum calibration on the fan-shaped angle of the center of circle formation of the xsect of ut socket (3) and the differential sleeve (4) to the center of circle formation of the xsect of differential sleeve (4).
3. a kind of screw-thread micrometer with vernier according to claim 1 is characterized in that: the adjacent scale mark that described ut socket (3) is gone up between 50 horizontal lines that increase can be coated with different colors, is beneficial to make things convenient for reading.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00217041 CN2413263Y (en) | 2000-03-28 | 2000-03-28 | Screw-thread vernier micrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00217041 CN2413263Y (en) | 2000-03-28 | 2000-03-28 | Screw-thread vernier micrometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2413263Y true CN2413263Y (en) | 2001-01-03 |
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ID=33582681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00217041 Expired - Fee Related CN2413263Y (en) | 2000-03-28 | 2000-03-28 | Screw-thread vernier micrometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2413263Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100359283C (en) * | 2005-12-30 | 2008-01-02 | 首都航天机械公司 | Horseshoe-shaped screw vernier deepness gauge |
| CN102128575A (en) * | 2010-12-16 | 2011-07-20 | 成龙 | Tenthousandth micrometer |
| CN103398640A (en) * | 2013-08-12 | 2013-11-20 | 太仓斯普宁精密机械有限公司 | Spiral micrometer with magnifying glass |
| CN103697781A (en) * | 2014-01-02 | 2014-04-02 | 祁砚明 | Ten-thousandth micrometer |
| CN106705798A (en) * | 2017-03-08 | 2017-05-24 | 重庆大学 | Tooth thickness measuring tool for annular gear |
| CN109186394A (en) * | 2018-07-28 | 2019-01-11 | 宁国市金优机械配件有限公司 | A kind of assembly detection apparatus with remote manipulator |
| CN110763096A (en) * | 2018-07-28 | 2020-02-07 | 宁国市金优机械配件有限公司 | Mechanical equipment detection device |
-
2000
- 2000-03-28 CN CN 00217041 patent/CN2413263Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100359283C (en) * | 2005-12-30 | 2008-01-02 | 首都航天机械公司 | Horseshoe-shaped screw vernier deepness gauge |
| CN102128575A (en) * | 2010-12-16 | 2011-07-20 | 成龙 | Tenthousandth micrometer |
| CN103398640A (en) * | 2013-08-12 | 2013-11-20 | 太仓斯普宁精密机械有限公司 | Spiral micrometer with magnifying glass |
| CN103697781A (en) * | 2014-01-02 | 2014-04-02 | 祁砚明 | Ten-thousandth micrometer |
| CN106705798A (en) * | 2017-03-08 | 2017-05-24 | 重庆大学 | Tooth thickness measuring tool for annular gear |
| CN109186394A (en) * | 2018-07-28 | 2019-01-11 | 宁国市金优机械配件有限公司 | A kind of assembly detection apparatus with remote manipulator |
| CN110763096A (en) * | 2018-07-28 | 2020-02-07 | 宁国市金优机械配件有限公司 | Mechanical equipment detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |