AT89122B

AT89122B - Self-chuck.

Info

Publication number: AT89122B
Authority: AT
Inventors: Otto Seifert
Original assignee: Otto Seifert
Priority date: 1921-02-28
Filing date: 1921-02-28
Publication date: 1922-08-10

Description

  

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  Selhstspannfutter. 



   Die Erfindung bezieht sich auf ein Selbstspannfutter und besteht darin, dass in einer konischen Ausnehmung des Futterkörpers bewegliche   Spannk. pcr   angeordnet sind, die eine solche Gestalt aufweisen, dass sie sich durch die Reibung zwischen ihnen und dem   Ein < panp-   stück bzw. dem Futterkörper einander gleichmässig nähern, das Einspannstük festspannen und gleichzeitig in die konische Ausnehmung hineindrücken. Die Erfindung betrifft weiten eine besondere Ausbildung der Spannkörper, des diese tragenden Lagers, sowie schliesslich der Spannvorrichtung. 



   In der Zeichnung   i : t   der Erfindungsgegenstand in mehreren beispielsweisen Ausführungsformen veranschaulicht. Fig.   J   zeigt einen Längsschnitt durch eine Ausführungsform   lies   Spannfutters. Fig. 2 ist ein Querschnitt nach der Linie A-B der   Fig. i.   In den Fig. 3 und 4 ist eine weitere Ausgestaltung im Längsschnitt und Querschnitt nach der Linie C-D der Fig. 3 dargestellt. Fig. 5 bis 8 zeigen Einzelheiten. In den Fig. 9 und 10 ist eine weitere Ausbildung im   Lings- und   Querschnitt dargestellt. 



   In einer konischen Bohrung eines die Spannmutter 2 tragenden Futterkörpers 1 sind die in vorliegendem Falle (Fig. I und   2)   als Kollen 3 ausgebildeten Spannkörper gelagert. 



  Die Rollen sind durch einen Lagerkorb untereinander verbunden. Dieser Korb ist aus Bügeln 4 zusammengesetzt, in welchen einerseits an den oberen Ender der Rollen vorgesehene Achsstummel 5 gelagert, andrerseits Schellen 6 festgelegt sind, welche in einen eingedrehten 
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    PATENT-ANSPRÜCHE:     !.   Selbstspannfutter, gekennzeichnet durch in einer konischen Ausnehmung des Futterkörpers (1) beweglich angeordnete Spannkörper (3) von solcher Gestalt, dass sie sich durch die Reibung zwischen ihnen und dem Einspannstück bzw. dem Futterkörper einander gleichmässig nähern, das Einspannstück festspannen und gleichzeitig in die konische Ausnehmung hineindrücken.



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  Self-chuck.



   The invention relates to a self-clamping chuck and consists in that in a conical recess of the chuck body movable clamping k. pcr are arranged, which have such a shape that they evenly approach each other due to the friction between them and the insert or the chuck body, tighten the clamping piece and at the same time press it into the conical recess. The invention broadly relates to a special design of the clamping body, of the bearing supporting these, and finally the clamping device.



   In the drawing i: t the subject matter of the invention is illustrated in several exemplary embodiments. Fig. J shows a longitudinal section through an embodiment of the chuck. Figure 2 is a cross-section on the line A-B of Figure i. 3 and 4, a further embodiment is shown in longitudinal section and cross-section along the line C-D of FIG. Figures 5 through 8 show details. In FIGS. 9 and 10, a further embodiment is shown in longitudinal and cross-section.



   In a conical bore of a chuck body 1 carrying the clamping nut 2, the clamping bodies, which are designed as bulges 3 in the present case (FIGS. 1 and 2), are mounted.



  The roles are connected to one another by a storage basket. This basket is composed of brackets 4, in which on the one hand stub shafts 5 provided on the upper end of the rollers are mounted, on the other hand clamps 6 are fixed which are screwed into a
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    PATENT CLAIMS:!. Self-clamping chucks, characterized by clamping elements (3) which are movably arranged in a conical recess of the chuck body (1) and are of such a shape that they evenly approach each other due to the friction between them and the clamping piece or the chuck body, tightening the clamping piece and simultaneously in the conical Press in the recess.

Claims

2. Chuck according to claim I, characterized in that the clamping bodies are designed as rollers, the outer surface of which is composed of parts of screw surfaces in such a way that only point contact takes place in the largest cross-section during clamping and rolling and therefore uniform rolling is ensured, whereas in the clamped position Condition the whole length of the generators wears., T 3. Lining according to claims 1 and 2, characterized by a rotating Mger, which consists of bracket-like bearings for the tensioning rollers, which layer! arch resilient guides are interconnected.

4. Feed according to claims 2 or 3, characterized in that the rollers rest with their entire base on the clamping nut, 5. Clamping device for the chuck according to claim i, characterized by a ring (l1) which can be adjusted and locked in the axial direction and onto which the clamping nut is screwed.

6. Clamping device according to claim $, characterized in that the ring (11) is provided with ratchet teeth and is fixed in the respective position by bolts (J or the like) mounted in the chuck body.

7. Clamping device according to claim 6, characterized in that the bolts (12) are influenced by the ring (11) penetrating pins (13), which 'the latter at the same time secure the ring against rotation.

8. Clamping device according to claim 7, characterized by a ring (15) which is provided with wedge surfaces and which is carried by the pins (13) and which influences the pins and bolts in such a way through the wedge surfaces when the position changes relative to the chuck. that by holding the ring by hand or by a stop, the ratchet teeth are released and the chuck is opened.

9. Clamping device according to claim 5, characterized in that the fixing of the support ring (11) takes place through the mediation of one or more rocking levers (17) provided with ratchet teeth.

10. Clamping device according to claim 9, characterized in that the ring (15) engages over the wedge-shaped ends of the lever (11) and pushes back through the action of the wedge surfaces.

11. Clamping device according to claim I0, characterized in that the ring (15) is U-shaped and the upper flange is widened in such a way that it comes to lie above the chuck body. n, chuck according to claim I, characterized by clamping bodies mounted axially and tangentially displaceably in wedge-shaped guides.