DE705212C

DE705212C - Shaft coupling

Info

Publication number: DE705212C
Application number: DEM146292D
Authority: DE
Original assignee: MAN Maschinenfabrik Augsburg Nuernberg AG
Current assignee: MAN AG
Priority date: 1939-10-21
Filing date: 1939-10-21
Publication date: 1941-04-21

Description

Die Erfindung betrifft eine Wellenkupplung, insbesondere für die Übertragung großer Drehmomente. Für derartige Kupplungen hat man bisher die Wellenenden mit je einer S Verzahnung versehen, deren Zähne beim Gegeneinander drücken der beiden Wellenenden ineinandergreifen, und so das Drehmoment von der einen Welle auf die andere übertragen. Diese Zahnkupplungen weisen jedoch eine Reihe von Nachteilen auf, die ihre Anwendung in vielen Fällen als ungeeignet erscheinen lassen. Um eine einwandfreie Übertragung des gesamten Drehmoments zu erreichen, muß dieses gleichmäßig auf sämtliche Zähne aufgeteilt werden. Das bedingt eine sehr genaue Herstellung der Verzahnungen, die schwierig und vor allem auch teuer ist. Dazu kommt, daß die Verzahnungen an den scharfen Innenkanten der Zähne wegen der hohen Kerbwirkung außerordentlich empfindlich sind, so daß sie für die Übertragung großer Drehmomente, wie sie beispielsweise bei großen Brennkraftmaschinen auftreten, keine genügende Sicherheit bieten.The invention relates to a shaft coupling, in particular for the transmission of large Torques. For such couplings, the shaft ends have so far each been provided with one S Toothed, the teeth of which press against each other when the two shaft ends press against each other interlock, and so transmit the torque from one shaft to the other. These tooth clutches have however, there are a number of disadvantages which make their use unsuitable in many cases appear. In order to achieve a perfect transmission of the entire torque, this must be evenly all teeth are divided. This requires a very precise production of the gears, which is difficult and, above all, expensive. In addition, the teeth on the sharp inner edges of the teeth because of the high notch effect are extremely sensitive, so that they are for the Transmission of large torques, such as those in large internal combustion engines occur, do not offer sufficient security.

Es ist auch bekannt, zwei Wellen durch Bolzen derart miteinander zu verbinden, daß die Bolzen in gemeinsamen, in der Stoßfuge der Wellen angeordneten radialen Bohrungen eingesetzt sind und das Drehmoment durch die Bolzen von der einen Welle auf die andere übertragen wird. Bei diesen Kupplungen müssen die Bolzen gegen ein durch die Fliehkraft bewirktes Hinausfliegen aus den radialen Bohrungen gesichert werden. Dies geschieht bei den bekannten Ausführungen in der Weise, daß nach dem Einsetzen der Bolzen am Umfang Material der Kupplungshälften über die Wände der radialen Bohrungen gezogen wird. Eine derartige Bolzensicherung ist aber keineswegs betriebssicher und vor allem nicht beliebig lösbar, so daß eine Auswechslung aller oder einzelner Bolzen oder eine Lösung der gesamten Wellenverbindung mit Schwierigkeiten verbunden ist.It is also known to connect two shafts to one another by bolts in such a way that the bolts in common radial bores arranged in the butt joint of the shafts are used and the torque through the bolts from one shaft to the other is transmitted. With these clutches the bolts have to be pressed against by the centrifugal force caused flying out of the radial bores are secured. This happens at the known designs in such a way that after the insertion of the bolt on the circumference Material of the coupling halves is drawn over the walls of the radial bores. Such a bolt securing device is by no means operationally reliable and, above all, not arbitrarily detachable, so that all or individual bolts or a solution can be replaced the entire shaft connection is associated with difficulties.

Um diese Nachteile zu beheben, sind erfindungsgemäß die Verbindungsbolzen an ihren der Wellenachse zugebehrten Enden mit einem Gewindezapfen versehen, mit dem sie in die entsprechenden Gewindebohrungen eines gemeinsamen Halteringes eingeschraubt sind. Diese Bolzensicherung ist baulich sehr einfach und betriebssicher. Sie ermöglichtIn order to remedy these disadvantages, the connecting bolts are on according to the invention provided their ends assigned to the shaft axis with a threaded pin with which they are screwed into the corresponding threaded holes of a common retaining ring are. This bolt safety device is structurally very simple and operationally reliable. It enables

Claims

in addition, any replacement of individual or all bolts in the shortest possible time, such as it makes the assembly of the coupling extremely easy. ., The drawing shows an exemplary embodiment of a shaft coupling according to the invention shown, namely shows

Fig. Ι a longitudinal section through the coupling along the line I-11 in Fig. 2, ' Fig. 2 is a cross section through the coupling along the line H-II in Fig. 1.

The two shaft ends 1 and 2 butt against one another and point at their stole a number of radially directed conical bores 3, the axes of which lie in the butt joint, so that each shaft j end takes up one half of the holes. In the holes 3 are conical bolts 4 i arranged, whose cone surface has the same »0 slope as the bore walls. The bolts 4 are held by a common retaining ring 5. in which they are screwed in by means of threaded pin 6. The conical design of the holes 3 and Bolt 4 has the advantage of making better use of the available annular surface between the two shaft ends. In addition, the shear stress is the Bolts distributed more evenly, as corresponding to the greater forces against the circumference Larger mounting surfaces are also available for the shaft ends. You can of course also use cylindrical bolts and bores use, only then the distribution of forces is not so favorable.

The illustrated embodiment shows two hollow shafts that run in the axial direction are held together by means of a threaded bolt 7; tie rods can be used for full shafts or tabs that grip over the butt joint on the shaft circumference, appropriate use Find. The retaining ring 5 can in all cases in corresponding recesses be inserted at the butt joint.

The shaft coupling according to the invention may in addition to the connection of two shafts and / .. as for the production of composite crankshafts find advantageous use.

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Shaft coupling, especially for the transmission of large torques which in the butt abutting shaft ends radially directed bores provided with axes lying in the butt joint of the shaft ends and in the bores corresponding bolts are arranged, characterized in that the bolts (4) at their ends with a threaded pin (6) are provided with which they can be inserted into the corresponding threaded holes a retaining ring (5) are screwed in.

1 sheet of drawings