WO1997012507A2 - Electronic, digital micrometer caliper - Google Patents

Electronic, digital micrometer caliper Download PDF

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Publication number
WO1997012507A2
WO1997012507A2 PCT/PL1996/000016 PL9600016W WO9712507A2 WO 1997012507 A2 WO1997012507 A2 WO 1997012507A2 PL 9600016 W PL9600016 W PL 9600016W WO 9712507 A2 WO9712507 A2 WO 9712507A2
Authority
WO
WIPO (PCT)
Prior art keywords
axis
clutch
micrometer caliper
gauge plunger
driving unit
Prior art date
Application number
PCT/PL1996/000016
Other languages
French (fr)
Other versions
WO1997012507A3 (en
Inventor
W$m(D)odzimierz GOLISZEK
Henryk Lesinski
Original Assignee
Goliszek Wdodzimierz
Henryk Lesinski
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from PL95310592A external-priority patent/PL178052B1/en
Priority claimed from PL31058795A external-priority patent/PL310587A1/en
Application filed by Goliszek Wdodzimierz, Henryk Lesinski filed Critical Goliszek Wdodzimierz
Publication of WO1997012507A2 publication Critical patent/WO1997012507A2/en
Publication of WO1997012507A3 publication Critical patent/WO1997012507A3/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
    • G01B3/18—Micrometers

Definitions

  • the object of this invention is a digital micrometer caliper, which finds his application with measurements of direct dimensions, external in particular, and also as adjustable gauge.
  • micrometer calipers can be split into three groups: mechanical micrometer (analogue and digital), sensor micrometer, electronic micrometer (analogue and digital).
  • mechanical micrometer analogue and digital
  • sensor micrometer analogue and digital
  • electronic micrometer analogue and digital
  • analogue measuring scale placed on a thimble and vernier sleeve of a micrometer allowing analogue reading of result.
  • Micrometer is built of a frame which left side arm has a measuring anvil and right one has spring-actuated sleeve with an internal thread cooperating with a rotary screwed spindle.
  • the thimble with a measuring scale an a clutch are fixed on the spindle.
  • the clutch is used to turn the spindle.
  • An electronic measuring converter of length is built into frame body of the micrometer while the ring standard of length is fixed on rotary measuring spindle.
  • the display window of an electronic measuring converter is placed on the right arm of the frame.
  • Mitutoyo's catalogue is that its digital indication of results has error which is a result of inaccuracy of threads in spring-actuated sleeve and spindle. Linear shift of a spindle is done by angular turning on the thread and then this rotary movement of the spindle is converted into digital indication of result.
  • a disadvantage is also a necessity of making 50 turnings with the spindle to move it into full range of measurement which is 25 millimeter.
  • Next disadvantage of micrometer is low ergonomics which results in necessity of using both hands while making measurements because the clutch used to turning the spindle is placed on the thimble or at the end part of spindle in the second version.
  • a hand-held micrometer caliper with inductive sensor and a analogue display for measurements of the direct dimensions and measurement by comparison.
  • the micrometer is built of main body equipped with the micrometer screw from one side, and at the opposite side but in axis of symmetry there is a sensor.
  • the sensor is connected to the electronic measurement circuitry equipped with an electric indicator and a supply source. They are housed into apparatus main body.
  • the gauge plunger of the inductive sensor is pushed against the measured unit by a spring, and it is equipped with the lever release allowing realizing of the measuring terminal from the measured unit
  • a knob of the electronic measuring circuity is installed on the body and allows preset an initial position of electric indicator's indicating needle.
  • the buttons for testing an internal supply source and button for changing the range of the electric indicator are also placed on the main body.
  • micrometer caliper described in Polish description of invention no: 91526 has also some disadvantages as: low ergonomics which causes that user must operate with both hands while measuring, and use of rotary spindle with theread which works together with screwed hole in the frame resulting in low accuracy in direct measurements.
  • the drawback of that mechanisms is necessity to include all backlashes appearing during the assembling process or inaccuracy or fretting of elements, and also necessity of using additional components in order to reduce the above effects.
  • the purpose of this invention is to build a micrometer caliper without listed previously shortcomings, which at the same time would allow linear guiding of elements with no backlashes.
  • the aim was achieved by designing an electronic digital micrometer caliper which has a frame with measuring anvil and a guiding set equipped with a gauge plunger, measuring terminals, clutch and capacitive measuring converter.
  • a symmetry axis of a clutch mandrel is situated crosswise to the gauge plunger's axis, in the best way with a right angle to the orthogonal projection of a symmetric axis of a gauge plunger on the plane of projection II, cutting an axis of clutch mandrel, and parallel to the gauge plunger's axis.
  • the pinion with linear toothed bar situated along a gauge plunger is placed on the clutch mandrel.
  • the clutch is situated in the best way into the frame, under the guiding unit.
  • the guiding unit of this micrometer caliper has prism guides and clamping rings.
  • the prism guides are made of prism fences and they are placed on the surface of elastic walls within connection clip (which is fixed to stiff base of the frame).
  • the advantage of the micrometer caliper based on this invention is shortening of the time which is necessary to move the gauge plunger. It is realized by using a drive of the gauge plunger by the pinion. To move the gauge plunger in full range takes three turnings of the clutch. An exclusion of the rotary movement of the gauge plunger while it's moved is also an advantage.
  • connection clip with prism fences connected to the surface of elastic walls within connection clip (according to the invention), non-backlash fitting of working elements is achieved during the assembling and later during exploitation of micrometer caliper.
  • the backlash appearing on working surfaces(as a result of wearing and tearing) is automatically reduced.
  • fig.1 presents the micrometer caliper in principal view and partially in cut
  • fig. 2 shows axis of the clutch mandrel in cut A-A marked on fig. 1.
  • the measuring anvil 2 is mounted in the left arm of the frame 1 , on the right arm of the frame there is solid fixed driving unit 3 .
  • the driving unit has in his frontal part cylindrical hole 4 which changes into rectangular shape 5.
  • the gauge plunger 6 is placed in the way allowing sliding in the driving unit 3. Cylindrical in the frontal part gauge plunger 6 is driven into cylindrical hole 4 of the driving unit 3 .
  • the gauge plunger 6 has placed along linear toothed bar 7 in mesh withpinion 8.
  • the pinion 8 is placed on the mandrel 9 of the clutch 10.
  • the clutch 10 is hidden below the driving unit inside an actual shaping 11 of insulation cover 12 of the frame 1.
  • the capacitive measurement converter 13 is installed on an upper side of the driving unit 3 over its rectangular shaped part 5.
  • Frontal part of the capacitive measuring converter 13 has digital display 14 and below it, on the side surface, there are buttons 15 and 16 which control the functionalns of the converter 13.
  • the micrometer caliper is also equipped with stirrup bolt 17 of the gauge plunger 6 which is situated perpendicular to the axis of the gauge plunger 6 on the right side of the frame 1.
  • connection clip 21 The way of assembling of the set for precise, linear driving of the gauge is as follows: insert along the gauge plunger 6 the guiding elements, prism fences 18(by fixing them permanently with glue). The are permanently fixed together with walls 20 of the connection clip 21 giving in result monolithic driving unit with permanent and self - contained backlash reducing facility of the working surfaces for linear driving. Then connection clip 21 should be fit on solid base 22 into the main body. In order to make measurement with the micrometer caliper the capacitive converter 13 must be switched on by button 16 and turing the clutch 10 to the left until the gauge plunger 6 and the measuring anvil 2 are touching each other with required pressure.
  • the measured unit has to be squeezed by that elements with the required measuring pressure. To do so the clutch 10 must be turned to the left.Then the result of measurement can be read from the digital display 14.
  • Button 15 is used to switch between imperial and metric scales.
  • the micrometer caliper can be also used as adjustable male gauge. In this purpose micrometer has to be set to the required measure and gauge plunger 6 has to be griped with the clamp 17.
  • the micrometer caliper also allows checking dimensional deviations of measured element.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)

Abstract

Electronic digital micrometer caliper consists of an axis of the mandrel (9) of the clutch (10), which is situated crosswise to the axis of the gauge plunger (6) at the same time on the mandrel (9) is placed the pinion (8) working together with the toothed bar (7) which is placed on the gauge plunger (6) along its axis. The clutch (10) is placed in the especially profiled shape (11) of the insulation cover (12) below the driving unit (3). The driving unit (3) has prism fences (18) fixed to the surfaces (19) of the elastic walls (20) in the clamp (21) placed on the solid base (22).

Description

Electronic, digital micrometer caliper
The object of this invention is a digital micrometer caliper, which finds his application with measurements of direct dimensions, external in particular, and also as adjustable gauge.
Known micrometer calipers can be split into three groups: mechanical micrometer (analogue and digital), sensor micrometer, electronic micrometer (analogue and digital). In the Mitutoyoto's company catalogue "Gauges and measuring instruments" PL-2001 on pages 20 and 21 there is shown an electronic micrometer caliper with digital indication of result. It has also an analogue measuring scale placed on a thimble and vernier sleeve of a micrometer allowing analogue reading of result.
Micrometer is built of a frame which left side arm has a measuring anvil and right one has spring-actuated sleeve with an internal thread cooperating with a rotary screwed spindle. The thimble with a measuring scale an a clutch are fixed on the spindle. The clutch is used to turn the spindle. On the spring-actuated sleeve there is installed a sleeve with a measuring lengthwise scale situated in parallel to the spindle. An electronic measuring converter of length is built into frame body of the micrometer while the ring standard of length is fixed on rotary measuring spindle. The display window of an electronic measuring converter is placed on the right arm of the frame.
A disadvantage of the micrometer presented in
Mitutoyo's catalogue is that its digital indication of results has error which is a result of inaccuracy of threads in spring-actuated sleeve and spindle. Linear shift of a spindle is done by angular turning on the thread and then this rotary movement of the spindle is converted into digital indication of result. A disadvantage is also a necessity of making 50 turnings with the spindle to move it into full range of measurement which is 25 millimeter. Next disadvantage of micrometer is low ergonomics which results in necessity of using both hands while making measurements because the clutch used to turning the spindle is placed on the thimble or at the end part of spindle in the second version.
It is also known, from polish invention description no: 91525 a hand-held micrometer caliper with inductive sensor and a analogue display, for measurements of the direct dimensions and measurement by comparison. The micrometer is built of main body equipped with the micrometer screw from one side, and at the opposite side but in axis of symmetry there is a sensor. The sensor is connected to the electronic measurement circuitry equipped with an electric indicator and a supply source. They are housed into apparatus main body. The gauge plunger of the inductive sensor is pushed against the measured unit by a spring, and it is equipped with the lever release allowing realizing of the measuring terminal from the measured unit A knob of the electronic measuring circuity is installed on the body and allows preset an initial position of electric indicator's indicating needle. The buttons for testing an internal supply source and button for changing the range of the electric indicator are also placed on the main body.
The micrometer caliper described in Polish description of invention no: 91526 has also some disadvantages as: low ergonomics which causes that user must operate with both hands while measuring, and use of rotary spindle with theread which works together with screwed hole in the frame resulting in low accuracy in direct measurements.
From Polish book "Drobne mechanizmy i przyrzady precyzyjne (Small mechanism and measuring instruments)", author: W. Tryliński, par. VII - prowadnice, are known precise linear pathway mechanisms which consist of slide guides enabling changes of position of guided elements according to their shape. Most often used in precise mechanisms of linear guiding are prism guides which have mechanical lash reduction facility by tap screws or press bolts. However these mechanisms of linear guiding were never used in micrometer calipers.
The drawback of that mechanisms is necessity to include all backlashes appearing during the assembling process or inaccuracy or fretting of elements, and also necessity of using additional components in order to reduce the above effects. The purpose of this invention is to build a micrometer caliper without listed previously shortcomings, which at the same time would allow linear guiding of elements with no backlashes.
The aim was achieved by designing an electronic digital micrometer caliper which has a frame with measuring anvil and a guiding set equipped with a gauge plunger, measuring terminals, clutch and capacitive measuring converter. According to the design a symmetry axis of a clutch mandrel is situated crosswise to the gauge plunger's axis, in the best way with a right angle to the orthogonal projection of a symmetric axis of a gauge plunger on the plane of projection II, cutting an axis of clutch mandrel, and parallel to the gauge plunger's axis. The pinion with linear toothed bar situated along a gauge plunger is placed on the clutch mandrel.
The clutch is situated in the best way into the frame, under the guiding unit.
The guiding unit of this micrometer caliper has prism guides and clamping rings. The prism guides are made of prism fences and they are placed on the surface of elastic walls within connection clip (which is fixed to stiff base of the frame).
The advantage of the micrometer caliper based on this invention is shortening of the time which is necessary to move the gauge plunger. It is realized by using a drive of the gauge plunger by the pinion. To move the gauge plunger in full range takes three turnings of the clutch. An exclusion of the rotary movement of the gauge plunger while it's moved is also an advantage. The placement of a symmetry axis of a clutch mandrel crosswise to the gauge plunger's axis, in the best way with a right angle to the orthogonal projection of a symmetric axis of a gauge plunger on the plane of projection II, cutting an axis of clutch mandrel, and parallel to the gauge plunger's axis allows use of the pinion in order to drive the gauge plunger and lets insert the clutch below the drive unit within the frame. Such positioning of the clutch makes all measurements possible with one hand only improving this was the ergonomics of instrument.
Thanks to the monolithic driving unit, with prism fences connected to the surface of elastic walls within connection clip (according to the invention), non-backlash fitting of working elements is achieved during the assembling and later during exploitation of micrometer caliper. The backlash appearing on working surfaces(as a result of wearing and tearing) is automatically reduced.
The object of invention is shown in example on picture, where fig.1 presents the micrometer caliper in principal view and partially in cut, while fig. 2 shows axis of the clutch mandrel in cut A-A marked on fig. 1.
The measuring anvil 2 is mounted in the left arm of the frame 1 , on the right arm of the frame there is solid fixed driving unit 3 . The driving unit has in his frontal part cylindrical hole 4 which changes into rectangular shape 5. The gauge plunger 6 is placed in the way allowing sliding in the driving unit 3. Cylindrical in the frontal part gauge plunger 6 is driven into cylindrical hole 4 of the driving unit 3 . The gauge plunger 6 has placed along linear toothed bar 7 in mesh withpinion 8. The pinion 8 is placed on the mandrel 9 of the clutch 10. The clutch 10 is hidden below the driving unit inside an actual shaping 11 of insulation cover 12 of the frame 1. The capacitive measurement converter 13 is installed on an upper side of the driving unit 3 over its rectangular shaped part 5. Frontal part of the capacitive measuring converter 13 has digital display 14 and below it, on the side surface, there are buttons 15 and 16 which control the functins of the converter 13. The micrometer caliper is also equipped with stirrup bolt 17 of the gauge plunger 6 which is situated perpendicular to the axis of the gauge plunger 6 on the right side of the frame 1.
Set for precise, linear driving of the gauge plunger has prism fences 1 8 which cooperate with the corresponding shapes on top of the gauge plunger 6, at the same time the prism fences 18 are placed on surfaces 19 of elastic walls 20 of the U-shaped connection clip 21. A base 21 is situated on solid base 22 of the main body.
The way of assembling of the set for precise, linear driving of the gauge is as follows: insert along the gauge plunger 6 the guiding elements, prism fences 18(by fixing them permanently with glue). The are permanently fixed together with walls 20 of the connection clip 21 giving in result monolithic driving unit with permanent and self - contained backlash reducing facility of the working surfaces for linear driving. Then connection clip 21 should be fit on solid base 22 into the main body. In order to make measurement with the micrometer caliper the capacitive converter 13 must be switched on by button 16 and turing the clutch 10 to the left until the gauge plunger 6 and the measuring anvil 2 are touching each other with required pressure.
By pressing button 16 again the reading on the digital display 14 is reset. Then turning the clutch to the right gauge plunger 6 is moved back and the element which is to be measured can be inserted between the
measuring surfaces of the measuring anvil 2 and the gauge plunger 6 . The measured unit has to be squeezed by that elements with the required measuring pressure. To do so the clutch 10 must be turned to the left.Then the result of measurement can be read from the digital display 14.
Button 15 is used to switch between imperial and metric scales. The micrometer caliper can be also used as adjustable male gauge. In this purpose micrometer has to be set to the required measure and gauge plunger 6 has to be griped with the clamp 17. The micrometer caliper also allows checking dimensional deviations of measured element.

Claims

Patent claims
1. Electronic digital micrometer caliper consisting of a frame equipped with a measuring anvil and a driving unit in which a gauge plunger is mounted with a measuring terminals, a clutch installed inside of the instalation cover which is especially profiled in this purpose, and a capacitive measurement converter characteristic for, that asymmetrical axis of the clutch (10) mandrel (9) is situated perpendicular to the axis of the gauge plunger (6), advantageously with the right angle to the orthogonal projection of the gauge plunger (6) on the plane projection II cutting the axis of the mandrel (9), and parallel to the pinion (8) working together with the toothed bar (7) which is placed on the gauge plunger (6) along its axis.
2. Micrometer caliper according to the claim 1, characteristic for the clutch (10) placed in the especially profiled shape (11) of the insulation cover (12) below the driving unit (3).
3. Micrometer caliper according to the claim 1, characteristic for that, that driving unit has prism and clamps.
4. Micrometer caliper according to the claim 3, characteristic for the prism guides made of the prism fences (18) and they are fixed to the surfaces (19) of the elastic walls (20) the clamp ( 21) placed on the solid base (22) of the mian body.
PCT/PL1996/000016 1995-09-21 1996-09-20 Electronic, digital micrometer caliper WO1997012507A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
PLP.310592 1995-09-21
PL95310592A PL178052B1 (en) 1995-09-21 1995-09-21 Electronic digital micrometer
PLP.310587 1995-09-21
PL31058795A PL310587A1 (en) 1995-09-21 1995-09-21 Mechanism for and method of effecting precise displacement of a mandrel especially of a gauge plunger

Publications (2)

Publication Number Publication Date
WO1997012507A2 true WO1997012507A2 (en) 1997-04-10
WO1997012507A3 WO1997012507A3 (en) 1997-07-31

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ID=26653172

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/PL1996/000016 WO1997012507A2 (en) 1995-09-21 1996-09-20 Electronic, digital micrometer caliper

Country Status (1)

Country Link
WO (1) WO1997012507A2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH577160A5 (en) * 1975-04-18 1976-06-30 Cho Viktor Internal measurement gauge with rectangular frame - has micrometer screw head adjustment for longitudinal axis of gauge with roller feelers on transverse axis
DE2639559A1 (en) * 1975-09-02 1977-03-10 Mitutoyo Mfg Co Ltd Combination micrometer and dial gauge - has feeler tip at rotating screw end of vernier for accurate measurement between centres
FR2680238A1 (en) * 1991-08-05 1993-02-12 Airgiss Sa Numerical (digital) micrometer
EP0646764A2 (en) * 1993-10-01 1995-04-05 Mitutoyo Corporation Digital display micrometer gauge

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH577160A5 (en) * 1975-04-18 1976-06-30 Cho Viktor Internal measurement gauge with rectangular frame - has micrometer screw head adjustment for longitudinal axis of gauge with roller feelers on transverse axis
DE2639559A1 (en) * 1975-09-02 1977-03-10 Mitutoyo Mfg Co Ltd Combination micrometer and dial gauge - has feeler tip at rotating screw end of vernier for accurate measurement between centres
FR2680238A1 (en) * 1991-08-05 1993-02-12 Airgiss Sa Numerical (digital) micrometer
EP0646764A2 (en) * 1993-10-01 1995-04-05 Mitutoyo Corporation Digital display micrometer gauge

Also Published As

Publication number Publication date
WO1997012507A3 (en) 1997-07-31

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