DE220150C

DE220150C -

Info

Publication number: DE220150C
Application number: DENDAT220150D
Authority: DE

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

Die Erfindung betrifft die Verbesserung einer Spindelreibungskupplung oder -bremse mit durch Schraubenspindeln bewegten Reibbacken, dadurch gekennzeichnet, daß die Stellvorrichtung der Schraubenspindeln in der Einrückstellung der Kupplung oder Bremse federnd gesperrt wird. Bei der Anwendung der Spindelreibungskupplungen oder -bremse an Maschinenteilen, die ständig Erschütterungen ausgesetzt sind, lockern sich durch die Erschütterungen die Spindeln allmählich, so daß der Andruck der Klemmbacken nachläßt und die Kupplung sich selbsttätig löst. Dieses selbsttätige Lösen soll durch die, der Erfindung entsprechende Vorrichtung verhindert werden. Der Erfindung gemäß wird die Stellvorrichtung der Spindeln in der Einrückstellung federnd gesperrt. Es ist vorteilhaft, die federnde Sperrung derart anzuordnen, daß der Bewegungswiderstand bei der Verstellung der Stellvorrichtung im Sinne des Ausrückens größer wird, die Stellvorrichtung also das Bestreben hat, in der Einrückstellung zu verbleiben bzw. in diese zurückzukehren. Dies kann dadurch erreicht werden, daß an dem Kupplungskreuz α oder an dem längs verschiebbaren Stellring d eine gabelförmige Feder f angebracht ist, deren Öffnung nach dem. sie tragenden Teil zu sich erweitert, während am Stellring bzw. am Kupplungskreuz ein in die Feder eingreifender, entsprechend geformter Keil, g befestigt ist. Die Vorrichtung kann auch aus einer wie vorher angeordneten und geformten, aber nicht federnden Gabel (Fig. 4), und aus einer oder mehreren geeignet gestalteten, am Stellring bzw. am Kupplungskreuz angeordneten, in die Gabel eingreifenden Federn bestehen; oder aber die Innenfläche einer geeigneten Gabel wird gerillt oder gezahnt, so daß federnd gegen sie angedrückte Klinken (Fig. 5) auf ihr beim Gleiten einen gewissen Widerstand finden. Statt dieser Vorrichtungen können eine oder mehrere Federn p im Stellring oder auf der Nabe des Kupplungskreuzes angeordnet werden, welche gegen schräge auf der Nabe des Kupplungskreuzes bzw. im Stellring angeordnete Flächen r drücken. Dieselbe Wirkung kann durch eine oder mehrere den Stellring in die Einrückstellung drückende bzw. ziehende Spiral- oder Schraubenfedern i erreicht werden. Einige Ausführungsformen dieser Erfindung sind auf der Zeichnung dargestellt. The invention relates to the improvement of a spindle friction clutch or brake with friction jaws moved by screw spindles, characterized in that the adjusting device of the screw spindles is resiliently locked in the engaged position of the clutch or brake. When the spindle friction clutches or brakes are used on machine parts that are constantly exposed to vibrations, the spindles gradually loosen as a result of the vibrations, so that the pressure on the clamping jaws decreases and the clutch releases automatically. This automatic loosening is to be prevented by the device corresponding to the invention. According to the invention, the adjusting device of the spindles is resiliently locked in the engagement position. It is advantageous to arrange the resilient locking so that the resistance to movement when adjusting the adjusting device in the sense of disengagement is greater, so the adjusting device tends to remain in the engagement position or to return to it. This can be achieved in that a fork-shaped spring f is attached to the coupling cross α or to the longitudinally displaceable adjusting ring d, the opening of which after. it extends the supporting part to itself, while a correspondingly shaped wedge engaging in the spring, g is attached to the adjusting ring or the coupling cross. The device can also consist of a fork (FIG. 4) arranged and shaped as before, but not resilient, and one or more suitably designed springs that engage the fork and are arranged on the adjusting ring or on the coupling cross; or the inner surface of a suitable fork is grooved or toothed so that pawls (Fig. 5) pressed against it resiliently find a certain resistance on it when sliding. Instead of these devices, one or more springs p can be arranged in the adjusting ring or on the hub of the coupling spider, which press against inclined surfaces r on the hub of the coupling spider or in the adjusting ring. The same effect can be achieved by one or more spiral or helical springs i pushing or pulling the adjusting ring into the engagement position. Some embodiments of this invention are shown in the drawing.

Fig. ι zeigt einen teilweisen Querschnitt durch eine mit der entsprechenden Vorrichtung versehene Reibungskupplung, Fig. 2 eine Draufsicht mit teilweisem Schnitt auf einen Teil dieser Reibungskupplung; in Fig. 3 bis 7 sind verschiedene der Erfindung entsprechende Ausführungsformen der Sperrung in größerem Maßstabe dargestellt.Fig. Ι shows a partial cross section by a friction clutch provided with the corresponding device, Fig. 2 a Top view with partial section of part of this friction clutch; in Figs. 3 to 7 are various embodiments of the locking according to the invention on a larger scale Scale shown.

Die am Kupplungskreuz α angebrachten Spindeln b, welche zur Verstellung der Klemmbacken c dienen, werden durch den Stellring d mittels der Hebel e, e' verstellt. Um ein selbsttätiges Ausrücken der Kupplung durch Erschütterungen im Betriebe zu vermeiden, ist (Fig. i, 2 und 3) am Kupplungskreuz eine The spindles b attached to the coupling cross α , which are used to adjust the clamping jaws c , are adjusted by the adjusting ring d by means of the levers e, e '. In order to prevent the clutch from disengaging automatically due to vibrations during operation, there is a (Fig. I, 2 and 3) on the clutch cross

Claims

resilient fork f and attached to the collar a wedge g engaging the resilient fork. The resilient fork expands, as mentioned above, towards the coupling cross, so that when the coupling is disengaged, d. H. When the adjusting ring is shifted to the right, the pressure of the fork prongs on the wedge increases until the spring completely releases the wedge in the position that corresponds to the complete disengagement. The device shown in Fig. 4 acts similarly and consists in a reversal of the device according to Fig. 3, since on it the fork is rigid and the part engaging in this fork is resilient. In the arrangement according to FIG. 5, too, the resistance to movement is greater when the adjusting ring moves in the direction of disengagement, since the grooves attached to the outer fork act as an inclined plane. . However, these inclined planes are very short, but in any case they are sufficient to deal with the. ' To protect pawls and thus the collar against displacement caused by vibrations. 6 shows an embodiment of the invention with a helical spring pulling the adjusting ring into the engagement position. In the sleeve h, the spring i is attached to the ring k attached to its end. The ring k is guided on the rod I and provided with the noses m, in which correspondingly shaped approaches of the resilient rods η engage. When adjusting the adjusting ring in the sense of disengagement, the spring is tensioned by the resilient rods η attached to the adjusting ring until the rods η are pressed against each other by the inclined surfaces 0 attached to the sleeve in the position near the position which corresponds to the complete disengagement and release the ring lugs so that the spring collapses and releases the collar. As a result of the bevels of the rod attachments, the rod attachments will come under the ring lugs again in the engagement position in order to protect the adjusting ring again against displacement due to vibrations. The embodiment of the invention shown in FIG. 7 works similarly to the devices according to FIGS on the hub of the coupling cross arranged, correspondingly shaped inclined surface r presses. In the event of a displacement in the sense of disengagement, the spring p is compressed more, that is to say the friction is greater, so that the adjusting ring is also secured in the engagement position by this arrangement. ■ Patent claims:

1. Friction clutch or brake with friction shoes moved by screw spindles, characterized in that the adjusting device of the screw spindles in the engagement position of the clutch or Brake is resiliently locked.

2. Embodiment of the device according to claim 1, characterized in that a fork-shaped spring (f) is attached to the coupling cross (a) or the longitudinally displaceable adjusting ring (d) , the opening of which expands to itself after the part carrying it, while the adjusting ring or a correspondingly shaped wedge (g) engaging in the spring is attached to the coupling cross.

3. The embodiment of the device Claim 1, characterized in that in a non-resilient fork (Fig. 4) a or several suitably designed, arranged on the adjusting ring or on the coupling cross Engage springs.

4. Embodiment of the device according to claim 1, characterized in that locking by one or more resilient grooved or toothed surfaces sliding pawls (Fig. 5) is effected.

5. Embodiment of the device according to claim i, characterized in that the blocking is provided by one or more springs (r) pressing springs (p ) is effected.

6. Embodiment of the device according to claim 1, characterized in that the blocking is effected by a helical spring (i) pushing or pulling the adjusting ring into the engagement position.

1 sheet of drawings.