Strain wave gear mechanism with inner seal

Abstract

The invention relates to a strain wave gear mechanism (1) with a gear mechanism component (CS) and an elastically deformable transmission component (FS) which is at least partially in alignment therewith in the radial direction (29) and can be deformed elliptically by way of a drive component (WG) which interacts therewith, in such a way that internal or external toothing systems (8, 9) which areprovided on the gear mechanism component (CS) and the transmission component (FS) can be brought into engagement in opposite regions of an elliptical axis, in order to rotate the transmission component (FS) and the gear mechanism component (CS) relative to one another, wherein the transmission component (FS) and the gear mechanism component (CS) are mounted such that they can be rotated relative to one another by means of a pivot bearing (30) which has a bearing intermediate space (16). In order that the risk of a lubricant leak and/or premature dry running of the gear mechanism can be reducedreliably, there is a strain wave gear mechanism, in the case of which an interior space (28) of the strain wave gear mechanism (1), which interior space (28) is enclosed at least partially by the transmission component (FS) and the internal or external toothing system (8, 9) and adjoins the pivot bearing (30), is sealed by means of an inner seal (12) with respect to the bearing intermediate space(16) of the pivot bearing.

Description

technical field [0001] The invention relates to a stress wave gear mechanism according to the preamble of claim 1 . Background technique [0002] Such gear mechanisms are used in various ways in various fields of technology, and they are especially frequently used in robotics and prosthetics. Reference is made here exemplarily to the applicant's Harmonie Transmissions, which belong to the group of stress wave gear mechanisms and whose principle of action is described, for example, at http: / / harmonicdrive.de / technoloqie / harmonic-drive-wellqetriebe / . Harmonie is a registered trademark of Hamenacor Drives AG, Limburg an der Lahn. [0003] In the traditional type of construction of a stress wave gear mechanism, where a drive member called an elliptical "wave generator" deforms a transmission member called an external flexspline via a rolling bearing, the transfer member is at the length of the ellipse In the opposite area of ​​the axis, it meshes with an internally meshing...

AI Technical Summary

Problems solved by technology

However, such sealing rings are often not able to withstand the high load of gear mechanism lubricant, so that undesired lubricant leakage occurs

Such a lubricant leakage can lead to the fact that within the gear mechanism on the side facing away from the toothing, there is almost no return of the consumed lubricant, which increases the additional lubricant quantity required due to the travel movement and the gear mechanism can dry out prematurely. run

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