This application claims priority to German Utility Model Application Serial No. 20 2005 013 514.3 filed Aug. 26, 2005, which is hereby incorporated by reference in its entirety for all purposes.
The present disclosure relates to a spindle nut which, as part of a drive device, is connected to a tube.
Spindle drives are common in different sectors of drive engineering. In the manufacture of such spindle drives, the spindle nut has to be connected, as an inwardly disposed part, to a tube. Different connection techniques have previously been used for this purpose. The spindle nut has thus, for example, been screwed in via a corresponding internal thread which is provided in the tube. Alternatively, the spindle nut forming the inwardly disposed part and the tube are connected to one another by a pin. Another connection technique consists of beads being applied in the tube.
In this connection by the application of beads or by the so-called pinning, that is in the plug connection between tube and inner part, no very high forces can be transferred. The screw connection of the tube is, in contrast, very costly since both the spindle nut and the tube each have to be provided with a thread.
It is therefore the object of the present disclosure to provide a spindle nut which can be connected, as part of a drive device, in a simple and cost-effective manner to a tube.
The object is solved in accordance with the present disclosure by a spindle nut that has a substantially cylindrical shoulder in which at least two recesses are cut out. A tube is pushed over the cylindrical shoulder of the spindle nut. In the region of the tube disposed above the recesses, the tube is now deformed toward the recess that the deformed regions of the tube contact the wall of the recess. A shape-matched connection is hereby provided between the spindle nut as an inwardly disposed part and the corresponding tube. The tube present as a single part can hereby be connected to the spindle nut present as a single part in one workstep without any further additional parts in a cost-effective manner.
Preferred aspects of the present disclosure result from the dependent claims following on from the main claim. Accordingly, first deformed regions of the tube can be supported particularly advantageously at the mutually oppositely disposed walls of a recess in the cylindrical shoulder of the spindle nut which extend parallel to the longitudinal axis of the tube. At the same time, second deformed regions of the tube can be supported at the mutually oppositely disposed walls of a recess which extend transversely to the longitudinal axis of the tube. The force of a spindle rotating in the spindle nut can hereby be transmitted in the radial direction and in the axial direction.
The deformation of the tube for the connection to the spindle nut can be formed in a simple manner by press-fitting.
The spindle nut in accordance with the present disclosure is advantageously provided as part of a rotary tube drive. Alternatively, it can also be provided as part of a shutter drive. A use in such drives is therefore possible since here a reliable transmission of force in the radial or axial direction is made possible.
Further features, details and advantages of the present disclosure result from the embodiment variant shown in the drawing. There are shown:
A spindle nut 10 and a tube 12 are shown in
The more exact structure results from
Number | Date | Country | Kind |
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20 2005 013 514.3 | Aug 2005 | DE | national |