AT94422B

AT94422B - Parallel vice.

Info

Publication number: AT94422B
Authority: AT
Inventors: Bruno Friedrich
Original assignee: Bruno Friedrich
Priority date: 1921-07-28
Filing date: 1921-07-28
Publication date: 1923-10-10

Description

  

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 Kraft greift hiebei in einem immer spitzeren Winkel zur   Keilfläche   an und fällt schliesslich in die Keilfläche selbst. Bei Weiterdrehung der Exzenter wird der Winkel negativ. Infolgedessen en'stehen nicht nur sehr starke, abwärts gerichtete Kräfte, welche die   Keilflächen 7c   und Backen   i   nach unten zu pressen trachten, sondern es wird auch bei Aufhören des Druckes durch die Exzenter eine Rückbewegung der Keilflächen 7c der Backen verhindert und eine grosse unausgeglichene, abwärts gerichtete Kraft bleibt bestehen.

   Diese drückt das Werkstück gegen das Bett, so dass es auf drei Seiten festliegt und verhindert jede   Rückbewegung,   da zufolge ihrer Richtung das zur Rückbewegung der Keilfläche k erforderliche Abheben von der   Keilfläche     l   wegen des völligen Mangels oder der   Geringfügigkeit   der in diesem Sinne wirkenden Teilkraft nicht eintreten kann.



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 Force acts at an ever more acute angle to the wedge surface and finally falls into the wedge surface itself. If the eccentric is turned further, the angle becomes negative. As a result, there are not only very strong, downwardly directed forces, which tend to press the wedge surfaces 7c and jaws i downwards, but also when the pressure is stopped by the eccentric a return movement of the wedge surfaces 7c of the jaws is prevented and a large unbalanced, downward force persists.

   This presses the workpiece against the bed so that it is fixed on three sides and prevents any backward movement, since, due to its direction, the lifting away from the wedge surface l required for the backward movement of the wedge surface k is not due to the complete lack or insignificance of the partial force acting in this sense can occur.

Claims

PATENT CLAIM: Parallel vise, characterized in that the pressing jaws (i) are connected to the adjusting jaws (sI) by means of a link parallelogram consisting of two parallel eccentrics (m, M) and have wedge surfaces on their rear sides which in the rest state with wedge surfaces (l) of the adjusting jaws Stay in contact when clamping workpieces, however, as a result of the eccentric rotation caused by this, and at the last moment of the rotation of the eccentrics, which go beyond their position causing the wedges to be pressed, a strong clamping of the workpiece placed by the eccentric against the vice bed and whose EMI2.1