DK153871B

DK153871B - GRIP

Info

Publication number: DK153871B
Application number: DK108980AA
Authority: DK
Inventors: Karl Pesch
Original assignee: Roehm Gmbh
Priority date: 1979-03-14
Filing date: 1980-03-13
Publication date: 1988-09-19
Also published as: SE8001949L; IT1128237B; DE2909937C2; FR2451244A1; CH644296A5; DK108980A; FR2451244B1; DK153871C; SE444903B; IT8067271A0; DE2909937A1

Description

Den foreliggende opfindelse angår en skruestik, især en maskin-skruestik, og iøvrigt af den i den indledende del af krav 1 angivne type.The present invention relates to a vice, in particular a machine vice, and, moreover, of the type specified in the preamble of claim 1.

Denne skruestiktype er kendt og har den fordel, at den bevægelige spændbakke kan hurtigindstilles til kontakt med det emne, som skal indspændes imellem skruestikkens bakker. Det er imidlertid en ulempe, at der ved den bevægelige spændbakkes overgang fra hurtigindstillingen og til den til spænding, som tilvejebringer spændekraften, optræder klemkoblinger, som er uheldige med hensyn til størrelsen af den spændkraft, som kan overføres til emnet, og med hensyn til sikkerheden i emnets indspænding.This type of vice is known and has the advantage that the movable clamping tray can be quickly adjusted for contact with the workpiece which must be clamped between the joints' trays. However, it is a disadvantage that at the transition of the movable clamping tray from the quick setting and to the clamping force which provides the clamping force, clamping couplings occur which are unfortunate in the magnitude of the clamping force which can be transferred to the workpiece and with respect to safety. in the workpiece clamp.

Opfindelsens formål er at udforme en skruestik af den indledningsvis angivne type, således at forbindelsen imellem spindelen og den bevægelige spændbakke er formsluttende overalt under emnets indspænding og under bibeholdelse af hurtiggangen, således at der derved kan overføres en højere spændkraft til emnet med større indspændingssikkerhed.The object of the invention is to design a vice of the type mentioned in the preamble, so that the connection between the spindle and the movable clamping tray is molded everywhere during the workpiece clamping and while maintaining the fast passage, so that a higher clamping force can be transferred to the workpiece with greater clamping safety.

Dette opnås med de i den kendetegnende del af krav 1 angivne ejendommeligheder for skruestikken ifølge opfindelsen.This is achieved with the characteristics of the screw plug according to the invention stated in the characterizing part of claim 1.

Det med opfindelsen opnåede fremskridt består i det væsentlige i, at den bevægelige spændbakkes hurtigindsti1 ling bibeholdes fuldt ud, mens der alligevel under indspændingen til enhver tid består en formsluttende forbindelse fra spindelen og til spændbakken samt til emnet. Med denne formsluttende forbindelse bliver de spændkrafter, som kan o-verføres til emnet, ikke blot store, men spændkrafternes overførsel og indspændingens opretholdelse sker også med høj sikkerhed, således at der ikke er risiko for, at emnets indspænding utilsigtet kan løsne sig, eksempelvis under hård bearbejdning.The progress of the invention consists essentially in maintaining the fast setting of the movable clamping tray fully while still having a form-fitting connection from the spindle to the clamping tray and to the workpiece at all times. With this form-fitting connection, the tensile forces that can be transferred to the workpiece are not only large, but the tensioning forces and the maintenance of the clamping are also made with high security, so that there is no risk that the clamping of the workpiece can inadvertently loosen, for example during hard machining.

Til emnets fastspænding bliver det muligt at overføre meget høje drejningsmomenter fra spindelen og til spændebøsningen gennem det formsluttende indgreb. Under den modsat rettede spindeldrejning, som løsner fastspændingen, fra spændesti 11 ingen og til spændeudgangstillingen, sker spindelens medbringe!se af spændebøsningen derimod kun ved hjælp af det radialt i forhold til spændebøsningen forskydelige medbri ngerstykke, hvilket imidlertid ikke betyder en ulempe, idet der herunder skal overføres et væsentligt mindre drejningsmoment.For the clamping of the workpiece, it is possible to transfer very high torques from the spindle and to the clamping bush through the form-fitting engagement. During the opposite directed spindle rotation, which loosens the clamp, from clamping stage 11 and to the clamping output position, the spindle is carried by the clamping bush, on the contrary, only by means of the radially displaceable connector piece, which does not mean a disadvantage, however, including must be transmitted a substantially less torque.

Hensigtsmæssige udførelsesformer er angivet i underkravene.Appropriate embodiments are set forth in the subclaims.

Figur 1 er et planbillede af en maskinskruestik ifølge opfindelsen,Figure 1 is a plan view of a machine vice according to the invention,

Figur 2 et længdesnit igennem skruestikken i figur 1,Figure 2 is a longitudinal section through the vice of Figure 1;

Figur 3 et frontbillede af skruestikken i figurerne 1 og 2 set i retning af de i figur 2 indførte pile III og med spindelen gennemskåret uden for skruestikken,Figure 3 is a front view of the vice in Figures 1 and 2 in the direction of the arrows III introduced in Figure 2 and with the spindle cut outside the vice;

Figur 4 et snit i større målestok igennem skruestikken i figur 2 og set i retning af den deri indførte snitlinie IV-IV i spindelens spænde-udgangsstilling, ogFigure 4 is an enlarged sectional view through the screw connector of Figure 2 and viewed in the direction of the cut line IV-IV inserted therein in the spindle starting position of the spindle, and

Figur 5 en afbildning svarende til figur 4, men vist i spindelens spændesti 11 ing.Figure 5 is a view similar to Figure 4 but shown in the spindle 11 of the spindle.

Den på tegningen viste boremaskineskruestik består af en skruestiksokkel 1, en heri faststående spændbakke 2 samt en i forhold til denne bevægelig spændbakke 3, der sidder i en langs en gi ideføring 4 i skruestiksoklen 1 forskydelig føreslæde 5. Den bevægelige spændbakke 3 samt dennes føreslæde 5 er indstillelig ved hjælp af en mod føreslædens 5 forside støttende spindel 6, som betjenes med hånden ved hjælp af en svingarm 7. Spindelen 6 er anbragt i et i forhold til skruestiksoklen I faststående lejestykke 8. I dette lejestykke kan spindelen på den ene side drejes imellem en spændeudgangsstilling, der fremgår af figur 4, og hvis svingarmstilling er betegnet med II i figur 3, og en af skruestikkens spændetiIstand afhængig spændesti 11 ing, der fremgår af figur 5, og hvis svingarmsti 11 ing i figur 3 ligger imellem spændeudgangssti11 ingen II og den maksimale spændeendestilling III alt efter spændetiIstanden, således at den samlede drejevej imellem spændeudgangssti11 ingen II og endestillingen III, hvilken drejevej er antydet ved dobbeltpilen II-III i figur 3, omslutter en drejevinkel for spindelen 6 på maksimalt 150°.The drill screw shown in the drawing consists of a vice base 1, a clamping box 2 fixed therein and a sliding tray 3 which is slidable relative to this movable clamping box 4 in the vice base 1 and the movable clamping box 5 and its guide slide 5. is adjustable by means of a spindle 6 supported on the front of the guide rail 5, which is operated by hand by means of a pivot arm 7. The spindle 6 is arranged in a fixed bearing piece 8 in relation to the vice base 8. In this bearing piece the spindle can be rotated on one side. between a clamp output position shown in Fig. 4 and whose pivot arm position is designated II in Fig. 3, and a clamping position 11 dependent on the clamping position shown in Fig. 5, and whose pivot arm path 11 in Fig. 3 lies between clamp output path 11 and the maximum clamping end position III according to the clamping state, such that the total turning path between clamping output paths II and end position The ring III, which is indicated by the double arrow II-III in figure 3, encloses a turning angle of the spindle 6 of a maximum of 150 °.

På den anden side kan spindelen 6 drejes imellem spændeudgangssti 1-1 ingen (figur 4 samt svingarmstilling II i figur 3) og en hurtiggangsstilling, hvis svingarmstilling er antydet ved I i figur 3. Drejevinklen imellem denne hurtiggangsstilling I og spændeudgangssti11 ingen II er ca. 30° og er antydet ved en dobbeltpil I-II i figur 3. I hurtiggangsstillingen er spindelen 6 aksialt frit forskydelig i lejestykket 8, således at føreslæden 5 med spændbakken 3 uden drejning af spindelen 6 kan forskydes hurtigt til anlæg mod det på tegningen ikke viste emne, som skal indspændes. Emnets indspænding med høj spændkraft imellem de to spænd-bakker 2, 3 sker derefter ved drejning af spindelen 6 fra hurtiggangsstillingen (svingarmstilling I), igennem spændeudgangssti11 ingen (svingarmstilling II) og til den af den pågældende spændetilstand afhængige spændesti 1 ling, der har den maksimale spændeendestilling (sving-armstilling III).On the other hand, the spindle 6 can be rotated between clamp output path 1-1 none (Fig. 4 and swing arm position II in Fig. 3) and a quick-start position whose swing arm position is indicated by I in Fig. 3. The angle of rotation between this fast-run position I and clamp output path 11 is approx. 30 ° and is indicated by a double arrow I-II in Figure 3. In the quick-start position, the spindle 6 is axially freely displaceable in the bearing piece 8, so that the guide carriage 5 with the clamping tray 3 without turning the spindle 6 can be quickly displaced to abut against the not shown in the drawing. item to be clamped. The workpiece clamping with high tension force between the two clamping jaws 2, 3 is then done by turning the spindle 6 from the quick-start position (swivel position I), through the clamp output position (swing-arm position II) and to the tensioning position dependent on the respective tension state maximum clamp end position (swing-arm position III).

For at udføre dette funktionsforløb er spindelen 6 lejret i en spændebøsning 9, som udvendigt bærer et til spændingsgevind 9.1 og dermed er indstillelig i et møtrikgevind 8.1 i lejestykket 8. Imellem spindelen 6 og spændebøsningen 9 er der arrangeret en i aksi al retningen formsluttende låseindretning 10 samt en i drejeretningen formsluttende medbrin-gerindretning 11 (figur 2). Låseindretningen 10, der er åben i spindelens 6 hurtiggangsstilling (svingarmstilling I), lukker ved drejning af spindelen 6 til dennes spændeudgangsstilling (svingarmstilling II) og fastlåser derved spindelen 6 til spændebøsningen 9 imod relative aksi al -forskydninger.In order to carry out this function, the spindle 6 is mounted in a clamping sleeve 9 which externally carries one for tension thread 9.1 and is thus adjustable in a nut thread 8.1 in the bearing piece 8. Between the spindle 6 and the clamping sleeve 9 a locking device 10 is provided in the axial direction. and a rotary engaging device 11 (Fig. 2). The locking device 10, which is open in the fast-moving position of the spindle 6 (pivot arm position I), closes by turning the spindle 6 to its clamping output position (pivot arm position II), thereby locking the spindle 6 to the clamp bushing 9 against relative axial displacements.

Medbringerindretningen 11 forbinder formsluttende og drejningstift spindelen 6 og spændebøsningen 9 på drejevejen II-III imellem spændeud-gangssti11 ingen og spændestillingen. I spændesti 11 ingen sker denne forbindelse i begge drejeretninger, men i spændeudgangssti11 ingen sker forbindelsen kun i den til til spænding svarende drejeretning. På denne dre-jevej II-III er låseindretningen 10 lukket til stadighed. Spindelen 6 og spændebøsningen 9 danner derfor en stiv enhed, som forskydes aksialt svarende til enhedens drejning i spændebøsningsgevindet 9.1, henholdsvis lejestykkegevindet 8.2, og derved til spænder eller løsner spændebakken 3 alt efter drejeretningen igennem den mod spindelen 6 støttende føreslæde 5. Medbringerindretningen 11 er uvirksom på drejevejen I-II, således at indretningen muliggør drejning af spindelen 6 i forhold til spændebøsningen 9 med henblik på åbning eller lukning af låseindretningen 10.The carrier device 11 connects the form-closing and pivot pin spindle 6 and clamping bushing 9 on pivot II-III between the clamp output path 11 and the clamping position. In clamping step 11, this connection does not occur in both directions of rotation, but in clamping output path 11, the connection occurs only in the direction of rotation corresponding to voltage. On this turning lane II-III, the locking device 10 is permanently closed. The spindle 6 and the clamping sleeve 9 therefore form a rigid unit which is displaced axially corresponding to the rotation of the unit in the clamping thread 9.1 and the bearing piece thread 8.2, respectively, thereby tightening or loosening the clamping tray 3 according to the direction of rotation of the guide sleeve 11 supporting the spindle 6. on the pivot I-II so that the device enables rotation of the spindle 6 relative to the clamping bush 9 for opening or closing the locking device 10.

Låseindretningen 10 består af et i aksialretningen forløbende og i spændebøsningen 9 fast låsestykke 10.1, som i længderetningen har en mod spindelen 6 vendende spidsfortanding 10.2 med på tværs af spændebøs-ningsaksen forløbende tænder. Til dannelse af låseindretningen 10 er der på spindelomkredsen desuden frembragt en til spidsfortandingen 10.2 på låsestykket 10.1 svarende modfortanding 10.3, der ligeledes er i form af en spidsfortanding, hvis tandlængde (dobbeltpil 10.4 i figur 4 og 5) i omkredsretningen er kortere end drejevejen I-II for spindelen 6 imellem dennes spændeudgangsstilling og hurtiggangsstilling, idet denne modfortanding strækker sig over en længde, som svarer til spindelens aksiale indstillingsområde, og som er antydet ved en dobbeltpil 10.5 i figur 2. Spindelen 6 er afstøttet aksialt fjedrende mod den bevægelige spændbakke 3, i den viste udførelsesform ved hjælp af tallerkenfjedre 13, nemlig i en udsparing 12 i spændbakkens føreslæde 5. Fjedervejen er i det mindste lig med den i aksial retning målte bredde af en tand i fortandingerne 10.2, 10.3 på spindelen 6, henholdsvis på låsestykket 10.1.The locking device 10 consists of a locking piece 10.1 which extends in the axial direction and in the clamping sleeve 9, which in the longitudinal direction has a toothed tooth 10.2 facing the spindle 6 with teeth extending transversely of the clamping axis. To form the locking device 10, there is also provided on the spindle circumference a counter-tooth 10.3 corresponding to the tip tooth 10.2 on the lock piece 10.1, which is also in the form of a tip tooth whose tooth length (double arrow 10.4 in figures 4 and 5) in the circumferential direction is shorter than the pivot direction. II for the spindle 6 between its clamping starting position and fast-moving position, this counter-tooth extending over a length corresponding to the axial setting range of the spindle indicated by a double arrow 10.5 in Figure 2. The spindle 6 is supported axially resiliently against the movable clamping tray 3. in the illustrated embodiment by means of plate springs 13, namely in a recess 12 in the guide carriage of the clamping tray 5. The spring path is at least equal to the axially measured width of a tooth in the teeth 10.2, 10.3 on the spindle 6 and on the locking piece 10.1, respectively.

Medbringerindretningen 11 består af to medbringerstykker. I den viste udføre!sesform dannes det ene medbringerstykke af det fast i spænde-bøsningen 9 siddende låsestykke 10.1, som på en ind i spændebøsningen 9 ragende del 11.1 (figur 4) har en anslagsflade 11.2, der bærer fortan-dingen 10.2, og i spændeudgangssti11 ingen slår spindelen 6 an mod denne flade 11.2 i den til til spænding svarende drejeretning med et sekantplan 11.3, langs hvilket fortandingen 10.3 på spindelen 6 er indrettet. løvrigt er der i nævnte drejeretning og foran sekantplanet 11.3 indrettet en spindel udsparing 14, som muliggør låsestykkets 10.1 frie passage på spindelens 6 drejevej imellem hurtiggangsstillingen og spændeudgangssti 11 ingen.The carrier device 11 consists of two carrier pieces. In the embodiment shown, one carrier piece is formed of the locking piece 10.1, which is fixed in the clamping sleeve 9, which has on a part 11.1 (Fig. 4) projecting into the clamping sleeve 9 a bearing surface 11.2 which supports the tooth 10.2, and in the clamping output path 11 does not engage the spindle 6 against this surface 11.2 in the corresponding direction of rotation with a secant plane 11.3, along which the tooth 10.3 of the spindle 6 is arranged. in the said direction of rotation and in front of the secant plane 11.3, a spindle recess 14 is provided, which allows the free passage of the lock piece 10.1 on the pivot 6 of the spindle 6 between the quick-start position and the clamp-out path 11.

Det andet medbringerstykke 11.4 er ført radialt forskydeligt i spændebøsningens 9 væg, og i dets radiale stilling er medbringerstykket styrbart ved anslag mod en i forhold til lejestykket 8 fast styrekurve 15. Til dette medbringerstykke 11.4 har spindelen 6 en medbringeranlægs-flade 11.5, mod hvilken medbringerstykket 11.4 fastholdes på drejevejen Π-ΙΙΙ imellem spændeudgangssti11 ingen og spændesti 11 ingen ved hjælp af styrekurven 15 og under dannelse af en formsluttende og drejningstiv forbindelse imellem spindelen 6 og spændebøsningen 9. I spændeudgangs-stillingen har styrekurven 15 en udsparing 15.1, hvori medbringerstykket 11.4, svarende til figur 4, kan træde tilbage under frigivelse af spindelen 6.The second carrier piece 11.4 is led radially displaceable in the wall of the clamping sleeve 9, and in its radial position, the carrier piece is controllable by abutment against a fixed guide curve 15 relative to the bearing piece 8. The mandrel 6 has a carrier system surface 11.5 against which the carrier piece 11 11.4 is held on the pivot path Π-ΙΙΙ between the clamp output path 11 and clamping path 11 none by means of the control curve 15 and to form a form-fitting and pivotal connection between the spindle 6 and the clamping bush 9. In the clamping output position 15, the control section 15 has a recess 15.1, corresponding to Figure 4, may resign during release of the spindle 6.

Sekantplanet 11.3, spindeludsparingen 14 samt medbringeranlægsfladen 11.5 strækker sig ligesom fortandingen 10.3 på spindelen 6 over en længde (dobbeltpilen 10.5 i figur 2), der svarer til det aksiale indstillingsområde for spindelen 6. I den viste udførelsesform danner spindeludsparingen 14 for det på spændebøsningen 9 faste låsestykke 10.1 samtidigt medbringeranlægsfladen 11.5 for det i forhold til spændebøsningen 9 indstillelige medbringerstykke 11.4. Til dette formål er spindeludsparingen 14 i tværsnit udformet som et cirkel afsnit. Sekantfladen for denne spindel udsparing 14 tjener som medbringeranlægsflade 11.5, som ligger an mod en plan frontflade 11.6 på det i spændebøsningen 9 indstillelige medbringerstykke 11.4, idet denne frontflades diameter kun er lidt mindre end sekantlængden.The secant plane 11.3, the spindle recess 14 and the carrier surface 11.5 extend like the tooth 10.3 of the spindle 6 over a length (the double arrow 10.5 in Fig. 2) corresponding to the axial setting range of the spindle 6. In the embodiment shown, the spindle recess 14 forms that of the clamp 9. locking piece 10.1 simultaneously carrying carrier surface 11.5 for adjustable carrier piece 11.4 adjustable to clamping sleeve 9. For this purpose, the spindle recess 14 in cross section is designed as a circular section. The secant surface of this spindle recess 14 serves as a carrier surface 11.5 which abuts a flat front surface 11.6 on the carrier piece 11.4 adjustable in the clamping sleeve 9, the diameter of this front surface being only slightly smaller than the secant length.

I spindelens spændeudgangssti11 ing (figur 4} er spændebøsningen 9 endelig sikret ved hjælp af et anslag 16 imod at blive meddrejet af spindelen 6 i drejeretningen mod hurtiggangssti 11 ingen. Anslaget 16 er udformet som faststående anslagsbolte, der griber ind i en not 17 i spændebøsningen 9 og slår an mod en notflade 17.1 i spændeudgangsstil-1 i ngen.Finally, in the spindle output clamp (Fig. 4}), the clamp bushing 9 is secured by means of a stop 16 against being rotated by the spindle 6 in the rotational direction towards the quick-travel path 11. The stop 16 is designed as fixed stop bolts which engage a groove 17 in the clamp bush. 9 and strikes against a groove surface 17.1 in the clamp output style-1 in each.

I hurtiggangssti 11 ingen har spindelen 6 en drejestilling, hvori fortandingerne 10.2, 10.3 på låsestykket 10.1 og på spindelen 6 er ude af indgreb, og hvori sekantfladen 11.5 for spindel udsparingen 14 ligger frit over låsestykket 10.1, således at spindelen 6 som allerede nævnt er aksialt frit forskydelig i lejestykket 8 og spændebøsningen 9 med henblik på hurtigindstilling af føreslæden 5 og den herpå siddende spænd-bakke 3. Ved drejning fra hurtiggangsstiΠingen og til spændeudgangs-sti 11 ingen kommer disse fortandinger 10.2, 10.3 i indgreb med hinanden, hvorved spindelen 6 bliver fastlåst imod aksi al forskydninger i forhold til spændebøsningen 9. Fjedervandringen for tallerkenfjedrene 13 muliggør herved en aksi al forskydning af spindelen 6 igennem i det mindste én tandbredde, således at fortandi ngerne 10.2, 10.3 også kan gå i indgreb, når spændbakken 3 allerede ligger an mod emnet på grund af en forudgående hurtigindstilling.In the fast-moving path 11, the spindle 6 has a pivot position in which the teeth 10.2, 10.3 of the locking member 10.1 and of the spindle 6 are out of engagement, and in which the secant surface 11.5 of the spindle recess 14 lies freely above the locking piece 10.1, so that the spindle 6 is axially mentioned. freely slidable in the bearing piece 8 and the clamping sleeve 9 for quick adjustment of the guide carriage 5 and the clamping tray 3 thereof. locking against axial displacements relative to the clamping bush 9. The spring travel of the plate springs 13 thereby enables an axial displacement of the spindle 6 through at least one tooth width, so that the teeth 10.2, 10.3 can also engage when the clamping tray 3 is already in contact. toward the subject due to a prior quick setting.

I spændeudgangsstillingen svarende til figur 4 står medbringerstyk-ket 11.4 endnu ikke i indgreb med spindelen 6. Først når spindelen 6 under emnets fastspænding drejes yderligere fra spændeudgangsstillingen og i retning mod spændeendesti11 ingen, meddrejer spindelen spændebøsningen 9 på grund af anslaget imellem sekantfladen 11.3 på låsestykket 10.1, hvorved medbringerstykket 11.4 trykkes ud af sin udsparing 15.1 i styrekurven 15 og imod sekantfladen 11.5 i spindel udsparingen 14, således at der igennem de to sekantflader 11.3, 11.5 på spindelen 6 samt de hermed i anlæg værende flader 11.2, 11.6 på låsestykket 10.1 og på medbringerstykket 11.4, opstår en formsluttende og drejningstiv forbindelse med spændebøsningen 9, hvorved låsestykkets 11.4 samt medbringerstykkets 10.4 anlæg imod sekantfladerne 11.3, 11.4 på spindelen 6 sker over en stor flade. Derfor kan et stort drejningsmoment overføres imellem spindelen 6 og spændebøsningen 9, uden at den specifikke fladebelastning på sekantfladerne 11.3, 11.5 bliver utilladelig stor.In the clamp output position corresponding to Fig. 4, the carrier piece 11.4 is not yet engaged with the spindle 6. Only when the spindle 6 under the clamping of the workpiece is further rotated from the clamp output position and towards the clamp end 11 does the spindle rotate the clamp bushing 9 due to the impact between the stop 11. 10.1, whereby the carrier piece 11.4 is pressed out of its recess 15.1 in the control curve 15 and against the secant surface 11.5 of the spindle recess 14, so that through the two secant surfaces 11.3, 11.5 of the spindle 6 and the abutting surfaces 11.2, 11.6 of the locking piece 10.1 and on the carrier piece 11.4, a form-fitting and pivotally rigid connection is formed with the clamping sleeve 9, whereby the abutment of the locking piece 11.4 and the carrier piece 10.4 against the secant surfaces 11.3, 11.4 of the spindle 6 occur over a large surface. Therefore, a large amount of torque can be transmitted between the spindle 6 and the clamping sleeve 9, without the specific surface load on the secant surfaces 11.3, 11.5 becoming unduly large.

Under dette drejningsmoments virkning skruer spændebøsningen 9 sig ud af møtrikgevindet 8.1 i lejestykket 8, hvilket resulterer i en tilsvarende aksial fremskydning af spindelen 6 og dermed af føreslæden 5 samt den herpå siddende spændbakke 3 på grund af den oprettede aksi ale låsning ved hjælp af fortandingerne 10.2, 10.3.Under the action of this torque, the clamping sleeve 9 screws out of the nut thread 8.1 into the bearing piece 8, which results in a corresponding axial displacement of the spindle 6 and thus of the guide carriage 5 as well as the clamping tray 3 thereof due to the axial locking created by the teeth 10.2. , 10.3.

Herunder er tallerkenfjedrene 13 fuldstændigt sammentrykket underBelow, the plate springs 13 are completely compressed below

Claims

A screwdriver, in particular a machine screwdriver, with a movable guide clamp (3) and with a control spindle (6) thereof, which in a fixed bearing piece (8) can be partly rotated between a clamping output position and a clamping lever 11 dependent on the clamping position partly can be rotated between the clamp output position and a quick-start position in which the spindle (6) is axially freely displaceable in the bearing piece (8) for quick adjustment of the clamping tray (3), in which the spindle (6) is mounted in a clamping sleeve (9) which externally carries a thread (9.1) and thus slidable in a nut thread (8.1) in the bearing piece (8), and in which a locking device (10) is arranged between the spindle (6) and the clamping sleeve (9). is open in the fast-moving path 11 of the spindle (6), which closes by turning the spindle (6) to the clamp output path, thereby locking the spindle (6) to the clamping bush (9) against axial displacements, and a carrier device (11), connecting the spindle (6) to the clamping sleeve (9), characterized in that the connection between the spindle (6) and the clamping sleeve (9) on the swivel between the clamping output position and the clamping position is effected by means of mold closure, this connection being done in both turns. nozzles in tensioning step 11, wherein the carrier device (11) for this purpose comprises a carrier piece (11.4) which is radially displaceable in the wall of the clamping sleeve (9) and is controllable with respect to its radial position by impact on a fixed relative to the the guide piece (8) is placed on the control curve (15), AT that the spindle (6) for this driver piece (11.4) is held on the pivot between the clamping output path and the clamping path none by means of the control curve (15) to form a form-fitting rotationally rigid connection between the spindle (6). and the clamping bush (9), that the control curve (15) has a recess (15.1) in the clamping starting position in which the carrier piece (11.4) can retract during release of the clamp the part (6), and the AT spindle recess (14) and the engaging surface (11.5) extend over a length (arrow 10.5) corresponding to the axial adjustment range of the spindle (6). in

A screw connector according to claim 1, characterized in that the carrier device (11) consists of a further carrier piece (10.1), which is fixed in the clamping sleeve (9) and forms an abutment surface (11.2) on one projecting into the clamping sleeve (9). part (11.1) against which the flat spindle (6) in the clamp output path does not rotate in the corresponding direction of rotation by a secant plane (11.3) by rotation, a spindle recess (14) in this direction of rotation being arranged to enable the driver piece ( 10.1) free passage on the pivot (6) of the spindle (6) between the quick-start position and the clamp output path 11, and the AT said secant plane (11.3) extends over a length corresponding to the axial setting range of the spindle (6) (arrow 10.5).

A screw plug according to claim 2, wherein the locking device (10) consists partly of a locking piece (10.1) extending in the axial direction, which is fixed in the clamping sleeve (9) and has a longitudinal tooth (10.2) facing towards the spindle (6). ) with teeth extending transverse to the axis of the clamp, and partly by a tooth (10.2) corresponding to the locking piece (10.1), which is arranged on the spindle circumference and whose tooth length in the circumferential direction is shorter than the pivot path of the spindle (6). -between the clamping output position and the fastening path 11, and where this counter-toothing extends over a length corresponding to the axial setting range of the spindle (arrow 10.5 in Figure 2), CHARACTERIZED that it forms a fixed guide piece (10.1) relative to the clamping bush (9). said locking piece, the teeth of the locking piece and the spindle (6) (10.2, 10.3) are arranged at the abutment surface (11.2) of the carrier piece and at the corresponding secant surface (11.3) of the spindle (6), and the AT spindle recess (1 4) for the carrier piece (11.5) fixed relative to the clamping bush (9) forms the carrier abutment surface (11.5) for the guide piece (11.4) adjustable to the clamping bush (9.4), the spindle recess (14) being in cross-section formed as a circular section whose secant surface serves. as a carrier abutment surface (11.5) which abuts against the adjustable carrier piece (11.4) adjustable in relation to the clamping sleeve (9.4) with a flat front surface (11.6) whose diameter or cross-section is only slightly smaller than the secant length.