This application claims priority to German Utility Model No. DE 20 2005 020 106.5, filed Dec. 23, 2005, which is hereby incorporated by reference in its entirety for all purposes.
The present disclosure relates to a gear motor, comprising a motor and a transmission flanged to the same, wherein this gear motor preferably is used for driving a closure element, such as a door.
In particular in the case of a garage door drives it is known to provide the motor with a flange-mounted transmission. A drive shaft extending from the transmission carries output means, for instance a chain wheel, which are disposed in a slide rail section, where they move a carriage connected with a closure means, i.e. for instance the garage door, via a chain or some other transmission means. Depending on the output means to be attached, different output axles must be used here.
It is the object of the present disclosure to develop a gear motor such that the same can easily be connected with the output means.
In accordance with the present disclosure, this object is solved by various combinations of the features disclosed herein. Accordingly, there is created a gear motor comprising a motor and a transmission flanged to the same, which includes a central, continuous hollow shaft, in which a plug-in shaft can be inserted, which is adapted to the profile shape of the hollow shaft and serves as an output shaft.
In accordance with the present disclosure, the output shaft can exclusively be mounted in the drive corresponding to this solution. This means that the hollow shaft can be mounted at low cost without any external influences or loads.
The insertable plug-in axle can be selected corresponding to the respective target system, i.e. the corresponding output means.
Other embodiments of the present disclosure may comprise various additional elements. For example, the plug-in shaft can be secured axially via snap rings.
The hollow shaft preferably can have a gear-like profile shape.
A protrusion of the plug-in shaft projecting beyond the transmission can be used as a rotary encoder.
An output means with the same profile shape as the hollow shaft can be pushed onto the plug-in shaft as an output shaft. Such output means can be a chain wheel or a toothed pulley.
The corresponding chain wheel or the toothed pulley can be incorporated in the slide rail section. A protrusion of the plug-in shaft projecting beyond the transmission can be used as a rotary encoder, but in a particularly advantageous aspect of the present disclosure, the speed-detecting sensor unit is integrated in the transmission housing. For this purpose, a pulse wheel and a housing-mounted sensor should be provided. The pulse wheel can be attached to the worm gear driving the hollow shaft.
The gear motor of the present disclosure does not require an axial guideway inside the drive.
Advantageously, a symmetrical housing and symmetrical screw-on points can provide for right-hand assembly as well as for left-hand assembly. Depending on the space conditions, the axle can be mounted in the hollow shaft from the left or from the right. Thus, one gear motor is obtained for both applications.
Due to the fact that the hollow shaft extends across the entire width of the transmission and that the plug-in shaft serving as an output shaft therefore protrudes from the hollow shaft on both sides, a sensor unit can be incorporated on the side of the transmission housing opposite the output means. This sensor unit can for instance be a speed-detecting sensor unit.
Since the output shaft can easily be inserted, a plurality of motors can be interconnected via one shaft.
Further features, details and advantages of the present disclosure will be explained in detail with reference to an embodiment illustrated in the drawing, in which:
a-1f show various views of a partly represented gear motor in accordance with a first embodiment of the present disclosure,
a-2d show an alternative embodiment of a gear motor in accordance with the present disclosure, and
a-3f show a third embodiment of a gear motor in accordance with the present disclosure.
a shows top view of a gear motor in accordance with the first embodiment of the present disclosure, said gear motor comprising a motor 10 and a flange-mounted transmission 12. The partly sectional side view of
As an axial system, an abutment 20 is formed on the plug-in shaft 18, which here is formed by a snap ring 24 engaging in a corresponding groove 22. This embodiment can be obtained with the plug-in shafts as shown in
In the embodiment as shown in
In the different representations of
Number | Date | Country | Kind |
---|---|---|---|
20 2005 020 106.5 | Dec 2005 | DE | national |