DK153744B

DK153744B - PARALLEL GRIP

Info

Publication number: DK153744B
Application number: DK341683A
Authority: DK
Inventors: Karl Jagob
Original assignee: Peddinghaus Rolf
Priority date: 1982-07-27
Filing date: 1983-07-26
Publication date: 1988-08-29
Also published as: CH658822A5; ES281457U; NL8302649A; NL191174C; FR2530994B1; SE8304161L; SE8304161D0; ATA223583A; AT385704B; NO832703L; NO153559C; DK153744C; DE3227964C2; IT8321927A0; IT1164292B; NO153559B; BR8303958A; DK341683A; FR2530994A1; SE454655B

Description

DK 153744BDK 153744B

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Opfindelsen angår en parallelskruestik af den i krav l's indledning angivne art. Skruestikkens faste spæn-dekæbe er en del af basislegemet, medens dens forskydelige spændekæbe er en del af styreskinnen. Skruespin-5 delen er forsynet med en pind til forskydning af styre-skinnen og tilvejebringelse af spændekraften. Styreskinnen er med et forudbestemt spillerum styret i skinnelejet i basislegemet. Såfremt en sådan parallelskruestik ikke er forsynet med en anordning til reduktion af de 10 fra spændekraften hidrørende kantpresninger mellem sty reskinnen og basislegemet, påvirkes styreskinnen af et fra spændekraften hidrørende moment, på grund af ' hvilket styreskinnen i sit leje kantstilles mere eller mindre i afhængighed af spillerummets størrelse, hvor-15 ved styreskinnen med stor kraft presses mod skinnele jet forneden ved dettes forreste kant og foroven ved lejets bageste kant. Disse kanttryk øges med spændekraften. En fra DE-offentliggørelsesskrift nr. 27 06 866 kendt parallelskruestik har en anordning til reduktion 20. af de omtalte kanttryk. Denne anordning består af særlige lejringsorganer i området ved de nævnte kanter. I delcylindriske lejringsorganer på basislegemet og på styreskinnen er indsat supplerende konstruktionsdele, nemlig tilnærmelsesvis halvcylindriske lejeelementer, 25 der med en bred lejringsflade ligger an mod styreskin nen henholdsvis mod basislegemet og på grund af deres egen cylindriske lejring kan følge kantstillingen. Disse særskilte lejeelementer tjener samtidigt til at reducere styrespillerummet. En sådan skruestiks funktion 30 er tilfredsstillende, men dens fremstilling er indvik let og bekostelig på grund af de omtalte særskilte konstruktionsdele .The invention relates to a parallel screw plug of the kind specified in the preamble of claim 1. The fixed clamping jaw of the vice is part of the base body, while its sliding clamping jaw is part of the guide rail. The screw-pin portion is provided with a pin for displacing the guide rail and providing the clamping force. The guide rail is controlled with a predetermined clearance in the rail bed in the base body. If such a parallel screw plug is not provided with a device for reducing the edge pressures resulting from the clamping force between the guide rail and the base body, the guide rail is affected by a torque derived from the clamping force, due to which the guide rail in its bearing is positioned more or less depending on the size of the clearance, where at the guide rail, with great force, is pressed against the rail jet below the front edge thereof and at the top at the rear edge of the bed. These edge pressures increase with the clamping force. One parallel screw engraving known from DE Publication No. 27 06 866 has a device for reducing 20. of said edge pressures. This device consists of special bearing means in the area at said edges. Additional sub-cylindrical bearing elements are included in partial cylindrical bearing members on the base body and on the guide rail, which with a wide bearing surface abut the guide rail and the base body respectively, and because of their own cylindrical bearing can follow the edge position. These separate bearing elements simultaneously serve to reduce the steering clearance. The function of such a vice 30 is satisfactory, but its manufacture is intricate and costly due to the said separate structural parts.

Den foreliggende opfindelse har til formål at videreudvikle konstruktionsdele i en kendt parallelskruestik 35 uden omtalte anordning til reduktion af kanttrykkene 2The present invention has for its object to further develop structural parts in a known parallel screw plug 35 without the mentioned device for reducing edge pressures 2

DK 153744BDK 153744B

på en sådan måde, at fra spændekraften hidrørende generende kantpresninger mellem styreskinnen og basislegemet undgås. Dette formål opnås ved en skruestik af den i krav l's indledning angivne art med de i krav l's 5 kendetegnende del angivne ejendommeligheder. Opfindel sen er baseret på den erkendelse, at styreskinnen ved hjælp af spindelmøtrikken praktisk taget uden at kantstilles kan trykkes og holdes plant til anlæg mod basislegemets øvre glideflade for skinnen, når spindelmø-10 trikken under indvirkning af spændekraften kan forsky des vinkelret på spindelens akse mod nævnte øvre glideflade, og når spindelmøtrikken derved medbringer styre-skinnen, som derved bringes til at støtte mod den øvre glideflade i basislegemet. Ved denne forskydning af 15 spindelmøtrikken og styreskinnen er der selvfølgelig tale om små forskydningslængder, der er bestemt ved styrespillerummet og tolerancerne. Til opnåelse af denne forskydelighed kræves blot en passende udformning af spindelmøtrikken, så at særskilte konstruktionsdele 20 i området ved de omtalte kanter kan bortfalde. Det er indlysende, at de flader, som trykkes mod hinanden, skal være tilsvarende nøjagtigt bearbejdet.in such a way as to avoid annoying edge pressures between the guide rail and the base body from the clamping force. This object is achieved by a vice of the kind specified in the preamble of claim 1 with the characteristics specified in the characterizing part of claim 5. The invention is based on the recognition that, by means of the spindle nut, the guide rail can be pressed and held flat against abutment of the base body's upper slide surface when the spindle nut can be displaced perpendicular to the axis of the spindle by said upper sliding surface, and when the spindle nut thereby carries the guide rail, which is thereby brought to support against the upper sliding surface of the base body. Of course, in this displacement of the 15 spindle nut and guide rail, small displacement lengths are determined by the guide clearance and tolerances. In order to achieve this slidability, only a suitable design of the spindle nut is required so that separate structural members 20 in the region at said edges can lapse. It is obvious that the faces pressed against each other must be similarly precisely machined.

Den i krav l's kendetegnende del principielt angivne løsning kan realisere på forskellig vis. Krav 2 kende-25 tegner mere konkret en foretrukken praktisk udførelses- form, der er enkel, let at fremstille og funktionssikker.The solution in principle characterized in claim 1 can in principle be realized in different ways. Claim 2 more specifically describes a preferred practical embodiment that is simple, easy to manufacture and functional safe.

Til understøtning af styreskinnen på spindelmøtrikken kan denne med en øvre flade ligge an mod den indre nedre flade på styreskinnens profilkrop. Ved en foretruk-30 ken udførelsesform for skruestikken har spindelmøtrikkens fod øvre bæreflader for nedre glideflader på styreskinnens profilflanger. Spindelmøtrikken kan forskydes vertikalt sammen med styreskinnen, der hviler på de nævnte bæreflader.To support the guide rail of the spindle nut, it can abut with an upper surface against the inner lower surface of the profile body of the guide rail. In a preferred embodiment of the vice, the foot of the spindle nut has upper support surfaces for lower sliding surfaces on the guide rails' profile flanges. The spindle nut can be displaced vertically together with the guide rail resting on said support surfaces.

33

DK 153744BDK 153744B

Basislegemets leje for møtrikkens fod kan ifølge opfindelsen på den modsat støttefladen beliggende lejeside have en bageste, modsat støttefladen skrånende skråflade, idet spindemøtrikkens fod er tilpasset denne.According to the invention, the base body bearing for the foot of the nut may have a rearwardly sloping inclined surface opposite to the supporting surface, the foot of the spinning nut being adapted to it.

5 Ved det i krav 5 angivne opnås med enkle konstruktive midler, at styrespillerummet mellem basislegemet og styreskinnen kan indstilles minimalt, så at spindemøtrikkens og dermed styreskinnens vertikale vandring kan holdes så lille som muligt.5 In accordance with claim 5, with simple structural means, the guide clearance between the base body and the guide rail can be minimized so that the vertical travel of the spindle nut and thus the guide rail can be kept as small as possible.

10 I det følgende forklares opfindelsen nærmere ved hjælp af tegningen, hvor fig. 1 dels set fra siden og dels i et langsgående snit viser en traditionel kendt parallelskruestik til forklaring af de sædvanlige kanttryk under brugen, fig. 2 dels set fra siden og dels i et langsgående 15 snit viser en udførelsesform for paralleskruestikken ifølge opfindelsen, fig. 3 er et snit efter linien A-A i fig. 2, fig. 4 i større målestok dels set fra siden og dels i et langsgående snit viser en del af en anden udførel-20 sesform for skruestikken ifølge opfindelsen, og fig. 5 er et snit efter linien B-B i fig. 4.10 In the following, the invention is explained in more detail with reference to the drawing, in which fig. Fig. 1 is a side view, partly in a longitudinal section, showing a conventional prior art parallel screw for explaining the usual edge pressures during use; Fig. 2 is a side view, partly in a longitudinal section, showing an embodiment of the parallel screw plug according to the invention; 3 is a section along the line A-A of FIG. 2, FIG. Fig. 4 is an enlarged side view, partly in a longitudinal section, showing part of another embodiment of the screw plug according to the invention; 5 is a section on the line B-B in FIG. 4th

Den i fig. 2-5 viste parallelskruestik ifølge opfindelsen har et basislegeme 1, en styreskinne 2, en skruespindel 3 med et spændepind 6 og to spændekæber 4 og 25 5, af hvilke den ene kæbe 4 er i ét med basislegemet 1, medens den anden spændekæbe 5 er i ét med styreskinnen 2, der er udformet som en nedadtil åben kassepro- 4The FIG. 2-5, the parallel screws of the invention have a base body 1, a guide rail 2, a screw spindle 3 with a clamping pin 6 and two clamping jaws 4 and 25, one jaw 4 of which is integral with the base body 1, while the other clamping jaw 5 is in combination with the guide rail 2, which is designed as a downwardly open box case 4

DK 153744BDK 153744B

fil og indsat i et skinneleje 7 i basislegemet 1. Styreskinnens topflade 8 ligger an mod en øvre glideflade 9 i basislegemet 1 og er styret af denne. Skruespindelen 3 løber i en med basislegemet 1 forbundet spindel-5 møtrik. Styreskinnen 2 er med et forudbestemt spille rum styret i skinnelejet 7. Spillet er for tydeligheds skyld vist større end i virkeligheden.file and inserted into a rail bearing 7 in the base body 1. The top surface 8 of the guide rail abuts an upper sliding surface 9 in the base body 1 and is controlled by it. The spindle 3 runs in a spindle-5 nut connected to the base body 1. The guide rail 2 is controlled with a predetermined playing space in the rail bed 7. The game is shown for greater clarity than in reality.

1 fig. 1 mangler en anordning til reducering af fra genstandens fastspænding i skruestikken hidrørende kant- 10 presninger mellem basislegemet 1 og styreskinnen 2, der påvirkes af et fra spændekraften hidrørende moment, som på grund af det omtalte nødvendige spillerum medfører den i fig. 1 viste kantstilling af styreskinnen 2 i skinnelejet 7, idet styreskinnen forneden ligger 15 an og støtter mod en forreste nedre kant på basislege met 1, medens styreskinnens topflade 8 ligger an og støtter mod en bageste kant på basislegemet. De to pile 11 og 12 i fig. 1 skal antyde, at der på disse steder opstår store kanttryk, som er desto større, jo 20 større spændekraften S er.1 FIG. 1 lacks a device for reducing edge pressures resulting from the clamping of the object in the vice between the base body 1 and the guide rail 2, which is actuated by a torque arising from the clamping force, which, due to the necessary clearance space, results in the in FIG. 1 shows the edge position of the guide rail 2 in the rail bed 7, the guide rail at the bottom 15 abutting against a front lower edge of the base member 1, while the top surface 8 of the guide rail abutting against a rear edge of the base body. The two arrows 11 and 12 of FIG. 1 is supposed to imply that at these places large edge pressures occur, the greater the 20 the greater the clamping force S.

Ved den i fig. 2-5 viste udførelsesform for skruestikken ifølge opfindelsen er spindelmøtrikken 10 indrettet til at reducere de fra spændekraften hidrørende kanttryk. I dette øjemed er spindelmøtrikken sammen 25 med den med en flade mod møtrikken støttende styreskin ne 2 under indvirkning af spændekraften S forskydelig mod basislegemet l's øvre glideflade 9 for styreskinnen 2, indtil styreskinnen overalt ligger an mod glide-fladen 9 og trykkes mod denne. Styreskinnens jævnt for-30 delte anlægstryk mod glidefladen er antydet ved pile ne 13 i fig. 2.In the embodiment shown in FIG. 2-5 illustrate the vice according to the invention, the spindle nut 10 is arranged to reduce the edge pressure resulting from the clamping force. For this purpose, the spindle nut together with the guide rail 2 supported by a surface against the nut, under the action of clamping force S, is displaceable against the upper body surface 9 of the guide rail 2 for the guide rail 2 until the guide rail abuts against the slide surface 9 and is pressed against it. The evenly distributed abutment pressure of the guide rail against the sliding surface is indicated by arrows 13 in FIG. 2nd

Ved den på tegningen viste foretrukne udførelsesform for skruestikken ifølge opfindelsen er spindelmøtrik- 5In the preferred embodiment of the vice according to the invention, the spindle nut is shown in the drawing.

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ken 10 udformet med en fod 14, der er indsat i et møtrikleje 15 i basislegemet 1. Lejet 15 har en opadtil mod skruestikkens forreste ende skrånende støtteflade 17, der samvirker med en med denne komplementær anlægs-5 flade 16 på møtrikfoden. Under indvirkning af spænde-kraften S samvirker støttefladen 17 og anlægsfladen 16 i et skråplan, selv om der ikke nødvendigvis er tale om plane flader. Under alle omstændigheder forskydes spindelmøtrikkens fod 14 under indvirkning af spænde-10 kraften i retning mod basislegemet l's øvre glideflade 9 for skinnen 2, hvorved spindelmøtrikken 10 medbringer styreskinnen 2. Forskydningslængden er bestemt ved det spil, hvormed styreskinnen 2 er anbragt i basislegemet 1, idet denne forskydning muliggøres ved frigangen mel-15 lem gevindgængerne på skruespindelen 3 og gevindet i spindelmøtrikken 10 eller også ved deformering af skrue-spindelen 3. Spindelmøtrikken 10 har øvre bæreflader 19, der ligger an mod nedre glideflader 18 på styre-skinnen 2's profilflanger 20, fig. 3 og 5, og spindel-20 møtrikken trykkes under indvirkning af spændekraften med de nævnte flader 19 mod fladerne 18 på styreskinnen.The jaw 10 is formed with a foot 14 inserted in a nut bearing 15 in the base body 1. The bearing 15 has an upwardly sloping support surface 17 sloping to the front end of the helix which cooperates with one with this complementary abutment surface 16 on the nut foot. Under the influence of the clamping force S, the support surface 17 and the abutment surface 16 cooperate in an inclined plane, although these are not necessarily planar surfaces. In any case, the foot 14 of the spindle nut is displaced under the action of the clamping 10 in the direction of the upper sliding surface 9 of the base body 1 for the rail 2, whereby the spindle nut 10 carries the guide rail 2. The displacement length is determined by the play with which the guide rail 2 is placed in the base body 1, this displacement is made possible at the clearance between the threaded threads of the screw spindle 3 and the thread of the spindle nut 10 or also by deformation of the screw spindle 3. The spindle nut 10 has upper supporting faces 19 which abut lower sliding surfaces 18 on the guide flanges 2 of the guide rail 2. FIG. 3 and 5, and the spindle-20 nut is pressed under the action of the clamping force with said faces 19 against the faces 18 of the guide rail.

Også på den modsat støttefladen 17 beliggende side har basislegemets leje 15 for spindelmøtrikkens fod en bageste skråflade 21, der opadtil skråner i retning mod 25 skruestikkens bageste ende, medens spindelmøtrikkens fod har en med fladen 21 komplementær flade.Also located on the opposite side of the support surface 17, the base body bearing 15 for the foot of the spindle nut has a rear inclined surface 21, which slopes upwards towards the rear end of the screw plug, while the foot of the spindle nut has a complementary surface with the surface 21.

Fig. 4 og 5 viser en i et sæde 22 i spindelmøtrikkens fod 14 indsat kile 23 til indstilling af spillerummet mellem skinnelejet 7 og styreskinnen 2. Kilen 23 kan 30 forskydes i horisontal retning ved hjælp af et låse ligt skruedrev 24, fortrinsvis et differentialskrue-drev, som kan drejes ved hjælp af en gennem en udsparing 25 i basislegemet 1 indført skruetrækker.FIG. 4 and 5 show a wedge 23 inserted in a seat 22 in the foot 14 of the spindle nut for adjusting the clearance between the rail bearing 7 and the guide rail 2. The wedge 23 can be displaced in a horizontal direction by means of a lockable screw drive 24, preferably a differential screw drive, which can be turned by means of a screwdriver inserted into the base body 1.

Claims

A parallel screw plug with a base body (1), a guide rail (2), a screw spindle (3) and a device for the avoidance of clamping pressure (11, 12) between the guide rail (2) and the base body (1), 3, wherein the guide rail is designed as a downwardly open casing profile inserted in a rail bearing (7) in the base body (1) and with a top surface (8) slidably guided at the abutment of the top surface against an upper sliding surface (9) in the base body, and with end edge faces (18) on the flanges (20) of the box profile 10 are slidably guided on lower sliding surfaces (19), and wherein the screw spindle (3) runs in a spindle nut (10) connected to the base body (1), characterized in that the spindle nut (10) is designed as the device for avoiding the edge pressure resulting from the clamping force (S) 13, the spindle nut (10) under the action of the clamping force (S) together with the guide rail (2) supported by a flat area (18) on the spindle nut (10). , is slidable to the upper slide surface (9) and held for systems against this.

A parallel screw according to claim 1, characterized in that the spindle nut (10) has a foot (14) inserted in a bearing (15) formed in the base body (1) with a front support surface (17) which slopes upwards in towards the front end of the vice, and the foot (14) of the spindle nut has a complementary abutment surface (16) with said front supporting surface (17) which, with the action of the clamping force (S), is caused to slide upwards along the supporting surface (17) together with the guide rail (2), thereby bringing it into contact with the upper sliding surface (9) of the base body (1).

3. A parallel screw according to claim 1 or 2, characterized in that the foot of the spindle nut (14) has upper support surfaces (19) for lower sliding surfaces (18) on the profile flanges (20) of the guide rail (2) and can be displaced vertically together with the guide rail (2) resting on the 5 surfaces (19).

Parallel screw plug according to claim 2 or 3, characterized in that the bearing (15) for the foot side (14) of the spindle nut (10) on the bearing side opposite to its supporting surface (17) has a sloping surface (21) inclined to the supporting surface 10, and that the foot of the spindle nut is adapted to this one.

Parallel screw plug according to claim 4, characterized in that a horizontal serving serving for adjusting the clearance between the guide rail (2) and the base body (1) is inserted in a seat (22) in the foot (14) of the spindle nut (10). displaceable wedge (23) which can be adjusted by means of a lockable screw drive (24), preferably a differential screw drive, which can be adjusted through a recess (25) in the base body (1).