DE1885688U - POINTER MEASURING DEVICE. - Google Patents

Description

RA, 726 747 * 11/12/63

VDO TACHOMETER WEEKS ΈΈΑΈΕΙ'ΰΉ.Τ / Μ. W.

ADOLF SCHIK33LIHG GlBH ⁺ GEJUSTRASSE

The invention relates to pointer measuring devices with a one

which is connected to the drive of the pointer mechanism by means of a loose _s through spring force positively © linkage -the drive of the pointer mechanism. a catch against which the ein.Antriebsrad-pointer mechanism by a spring force that the pointer back - is effected position held ₉ in Appendix "

The adjustable system part in the measuring mechanism executes a rotation with a total angular deflection according to the action of the measuring device, which is transmitted to the pointer mechanism by the linkage and the oesat angle deflection of the pointer. between. the. Skaleagrenzwerten .- "of the dial in a predetermined size corresponds to. In the case of 'the series production of such measuring instruments, z * B. * of motor fahrz.eugmeßg.eräten. For else pressure or temperature display, then the difficulty occurs that by the unavoidable manufacturing tolerances of the total angle deflection of the rotating system part is different from the nominal value. If the scale division of the prefabricated dial is adapted to the nominal value of the deflection angle of the mechanism, there is a deviation from this nominal value and the transfer to the motion work too small or too großen'Zeigerausschlag. experience has shown that N & N., the dispersion of the deviation from the desired value so large that the display inaccuracy caused thereby the allowable tolerance exceeds * it was, therefore, been forced several varieties of dials different. To make graduations, 'for example, three different dials, and had to ^,. At d & g Monday e and calibration of the devices

the one matching the admissible display tolerance . " choose. For measuring devices that have a translation in the pointer mechanism use to achieve a display scale of e.g. -2? 0 °, you also had to have two or three different © translations of the Seigerwerk ready to read the measuring values with the deviations of the deflection angle from the setpoint. Through these difficulties, the manufacture became such pointer measuring devices are not insignificantly expensive.

The invention eliminates this drawback and develops the devices in such a way that different total deflection angles of the "leßwerk" are possible to adapt to a certain total deflection angle of the pointer given by the scale limit values of the dial and thus the use of uniform dials and 2®ig @ rwerlE @ The invention consists in that the axis of the measuring mechanism and the axis of the drive of the pointer mechanism can be adjusted relative to one another in such a way that the articulation through the measuring mechanism that acts on the pointer mechanism always produces the same total deflection angle of the pointer mechanism. . der'.Kegel the dial and the Zeigerwerk'bei such devices in the measuring .gerätegehäuse arranged fixed - 'are' is © s sweekmäßig that Meßwerksachse relative to the drive axle of: .Zeigerwerkes - u this preferably parallel% - adjustable to arrange. ' Beer production of the "measuring mechanism axis. -Etat © ine lengthening or shortening, of the articulation distance on the drive axis to the pole and thereby causes a reciprocal" change in the pointer deflection angle * Um-.this change evenly. distribute it over the scale see below, it is also expedient to adjust the measuring mechanism axis in the plane of symmetry of the total deflection angle of the articulation. ; . ^:

The invention is based on a particular embodiment namely on a temperature measuring device with a, spiral " Tubular spring bent in several turns as a measuring element The drawing shows this exemplary embodiment in.,

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fig.1 © ine bent apart

Representation of the measuring mechanism. "And the pointer

as in - - .; .

Pig.2 © ine Prinzipski sze d © r AchsenTerstelliasg. "■ and their effect on di @ Anlenkung- of · '· pointer mechanism.

In the housing of the pointer measuring device, not shown, a circuit board 1 is attached, on which the M © ßw © rk 2 wad the. Pointer mechanism 3 built up "Siad * The measuring element 4 d @ s leßwer ^ it is in the exemplary embodiment a multiple spiral wound horn wire for © ine Searßeraturferaaessung.g. Di © via a lead 5 ia slipped to the outer end 4a of the Löbxenfed.er Λ known. ₌ Weis @ -Tbn.. a 'dependent fluid pressure is applied. The outer a? ©. end 4a of the tubular spring is soldered into the fork-shaped .g © bog © n®n JDei.1 6a of a plate 6., with the .a .AdasboXssa 7. is firmly connected. "This 4ehsbol ^ © n 7 represents the ego of the measuring mechanism and on its upper 'stepped end, which is fitted as an axle journal', it can be freely rotated inner end 4b of the EÖhrenf @ d © r 4..fastened. · is. With the Büöhs.e ,,: 9 '' - us; over .these. '. With -the - other end'4b of the Eöhrenfeder - a driver 8'fest-yerbiadbar .. If the _: ■ Böhrenfeder by' a -Bridge applied _s daaa looking for them. ■ to bend over and causes a rotation of the meter -8- counterclockwise from the "MeßwerksaoBs.e 7 · ·.;

Above the measuring mechanism 2, the platinum © 1 is forbidden on the sdLt © a standing bolt 10, the seig © rw © rk 5 is attached ^. between a two sinkers 11 mounted transmission gears, * the. by "the driver 8 articulated drive wheel ... 12, - which kiaat with a on the pointer shaft 13 seated gear 14. Between the pointer shaft 1 $ and the plate 11 'with gate tension a © Eückr spring 15 ^{: is} arranged, the over the "e-taungsräder that-. Drive wheel 12 in contact with the 'driver.8 / holds "Auf.der

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Pointer shaft 1 $ is the Seiger 16 - put on * and fastened «,

In the known designs of such pointing device © ', the leßwerMachs © 7 with the plate 6 on the platinum © 1 is rotatably arranged. A band segment over plate 6 is provided with a toothing 17, by means of which the gang®! © ütoä 2 ■ can be rotated about the axis 7 by an adjusting key 19 on the Hullpu & kt & Qrrektup that can be inserted from the outside through a recess 18 in the platinum ©. laugh of the invention? on the other hand, the measuring mechanism axis 7 Mt of the plate 6 on "© iiser su ^ tslichen. plate 20 rotatably arranged * The plate 20 and with ite the whole measuring mechanism 2 is placed on the plate 1 and on this with lugs 21 in guide-uagen * 22 ia Hiehusig A or B adjustable "For this purpose, a toothing 23 is also provided on the plate .20, by means of which an. ®hs- ■" ■ - .. parallel * division of the flow plant is possible. Up to plates 6 and 6 can be fixed in their setting positions by means of screws 26 "and 28 on the board 1, respectively.

In construction des.Meßgerätes are 'die'Me'ßwerks & CHSE 7 and the axis 27 of the drive wheel 12 over each other achegleich, Ψ © η of impingement lull to SUAE! Faiaalwart causes the' tube spring 4, © ine adjustment d ^ s driver 8 to inen © Angle Ai. whose setpoint is, for example, 90 °. -Aa the driver 8 is with'einem radial Ars the drive wheel 12 of the pointer mechanism 13 by the force -der. P @ d © r * 15 © ageleakt and the pointer carries out: with a gear ratio of the pointer mechanism of 1: 3, a total wiskel deflection of 270 °. If , as a result of the manufacturing tolerances, the total angular deflection of the driver 8 is greater or smaller than the setpoint Ot · 90 °, then the total angular deflection of the pointer 16 is correspondingly greater or smaller than 270 °. The invention is intended to meet the condition that the total angular deflection / 2 of the drive wheel 12 of the pointer mechanism 3 is constant, so that the total angular deflection of the pointer 16 is always 270 °.

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Fig. 2 shows how this is achieved by the .invention © Yerstellabeit the Messwerksacias © "7 on the drive axle 27 of the work
of the driver S is smaller than ^ ₉ then »uB in the direction A by the amount a, « is that than Φ ₉ then the axis'7 must be. Visible to be adjusted. In order to distribute this correction of the pointer deflection evenly over the scale, the adjustment of the leßwerkseehse 7 takes place in the syraaetrie level of the -. "Total deflection $ t of the driver 8.

In the practical implementation, this corrector is used to achieve a constant pointer deflection trots the 3? he. The prefabricated leßwerk with the exception of the fixed ferbimd-ung between the driver S and the inner end 4b of the Böhrenfeder.4 is built up on the Platin® 1. Bam is the © A bridge is applied to the tubular spring ** which corresponds to the length of half the total deflection angle of the switch 16. The litnelm © r 8 is now set as precisely as possible in the direction of the adjustment plane AB and then through with the socket © 9. * Solder © which is also firmly connected by a clamp connection. B & at see slight deviations from the SyMa © trIelage..of the driver 8 are corrected by breeching the panel 6 with d @ m _: Eipsteinschluss el 19. Barauf -will the indexing mechanism 3 on the stud bolts 10. Put on, the drive wheel 12 by, tensioning the spring 15 brought into contact with the driver 8. UiId the pointer 16 on the Zreigermrelle 15 Ia ÜberelnstiramuBg with the application of the drilling spring - 4 ^: on the corresponding scale set and attached to the head 13. Then the Eöhrenfeder 4 is relieved, whereupon by the restoring force of the spring 15, the pointer 16 is to adjust to the läullwert. If this correlation with the zero value does not apply, it is corrected by adjusting the measuring system 2 in direction A or B with the aid of the setting key 25. In the same way, the correspondence of the pointer selection can be d Skl ^ t kiit d tll h

Corrected the stroke with the Scalo ^ tSSt and possibly still remaining deviations of the pointer deflection from

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the Skalengrenswerten .by .- * repeatedly * Brehen and ¥ erscM. @ fe © si the HeßrorksacJis © be compensated 7 "·"In-'Zeichnung are aur better Yeraäsehauliehung (especially in 'Pig.2) di © YersteXlagen the measuring ^ @ rks- ~ axis 7 as well as the Mitnehiaers 8 strichpusaktiert-in-'¥@rlarge.erfee*n. Distances drawn in. In practice -file "¥ first @ ll ways a and b have a size up to about 1 -

Instead of a .aehspar®llel @ n ¥ © 3? ^ T @ lltang a Terschwesk @ n can dies.er Aletea in just the ßes®mtausseal © @ §E-wiÄel ^ tee

the priority of the

a correction of the 2 »@ igeraiä © chl @ ge

Claims (4)

P A. 7 1 R 7 ί 7 * 1 Ί 11 R3 ^r · Pointer measuring device with a measuring mechanism which rotates angularly around its axis and which is positively linked to the drive of the pointer mechanism through a loose spring force; connected., characterized ^ fkennzeichne ^ «_ that adaptation to" Gesamtauschlagwinkel of the measuring unit on © ln © & by the Skalengrentwerte of the dial total angle of the pointer (16) .The axis of, the measuring unit (2) and the axis © (27) .the. output of the pointer mechanism (3) can be adjusted in relation to one another in such a way ';' are j. that the action on the Seiger movement ... by the measuring movement always causes the same CkiSüata ^ ssehl & g-. angle of the pointer movement. 2. / Pointer measuring device according to claim 1, characterized in that the leßwerkachse (?) Ia d @ r STraetrieebeiie; the 'total deflection angle (CC ) of the linkage (driver 8) - preferably parallel to the drive axle () of the movement (3) - adjustable is arranged v. -. .... 3. / Pointer measuring device according to claims 1 and 2 ₈ -dajgrch- .. gekenngeichn © t ₈ that the -Sießwerkachse. (? -) on one, in Hihruagen. (22) a circuit board (1) which is adjustable and fixed in its setting position ) is adjustable. 4. / Pointer measuring device after den'AiusprüchezL gekenng gichnet that the measuring element (4) is arranged on the adjustable plate (20) in a known manner around the measuring mechanism axis (7) and can be fixed in the setting position.