Cycloidal transmission

Abstract

Disclosed is a cycloidal transmission. The cycloidal transmission comprises a housing (02) with a cylindrical inner housing wall, (21) which is arranged concentrically about a cylinder axis (20) and which is provided with an inner toothing (22). The cycloidal transmission further comprises an input shaft (03), which is rotatably mounted about the cylinder axis (20) and which has at least two eccentric sections (31) of equal eccentricity (32), which are arranged so as to be rotated regularly about the longitudinal axis (30) of the input shaft (03). The cycloidal transmission also comprises an output shaft (04), which is rotatably mounted about the cylinder axis (20), wherein the longitudinal axes (30, 40) of the input shaft (03) and of the output shaft (04) correspond to the cylinder axis (20). The cycloidal transmission further comprises at least two cycloidal discs (05, 06, 07), of which each cycloidal disc (05, 06, 07) is rotatably arranged about a pertaining central axis of rotation (50, 60, 70) on an eccentric section (31) and has an outer toothing (51, 61, 71) that meshes with the inner toothing (22). The axis of rotation (50, 60, 70) of each cycloidal disc (05, 06, 07) is offset to the cylinder axis (20) by the eccentricity (32), wherein the diameter of the cycloidal discs (05, 06, 07) is dimensioned such that the outer toothing (51, 61, 71) thereof engages with the inner toothing (22) in a direction, in which the eccentric section (31) on which a cycloidal disc (05, 06, 07) is arranged, momentarily points. On the other hand, the outer toothing (51, 61, 71) is free from engagement with the inner toothing (22) in the opposite direction, wherein the cycloidal discs (05, 06, 07) each have reference surfaces (53, 63). The cycloidal transmission additionally comprises at least one output member (08), which is rotatably mounted about the cylinder axis (20) and which is operationally connected to one or a plurality of reference surfaces (53, 63) of at least one cycloidal disc (05, 06, 07) such that the movements of one or a plurality of cycloidal discs (05, 06, 07) are converted into a rotational movement of the output shaft (04) during their rolling in the housing (02). The cycloidal transmission (01) is characterised by an even transmission radio i. The outer toothings (51, 61, 71) of the cycloidal discs (05, 06, 07) each have an even number of teeth. The inner toothing (22) of the housing (02) has a number of teeth that is greater or lesser by a (whole) number Z, N+Z or N-Z.

Description

technical field [0001] The invention relates to a cycloidal drive as defined in the preamble of claim 1 . Background technique [0002] A single-stage cycloidal drive comprises one or more eccentrically driven cycloidal discs, each of which is offset from each other by means of an input shaft provided with a corresponding number of eccentric circles in the form of They are evenly arranged to rotate relative to each other, and the cycloidal discs roll in the housing. For example, a cycloidal disc can be realized as a gear with an external set of teeth, or as a cam disc. For example, the contact between the housing and the cycloidal disc can be established by means of an internal toothing, with teeth or connecting rollers and / or ball bearings. The output device converts the motion of one or more cycloidal discs as they roll within the housing into rotational motion of the output shaft. For the purposes described above, the output device may be connected to the output shaft,...

AI Technical Summary

Problems solved by technology

[0012] It can be seen that combining a single-stage cycloidal drive with a further drive to obtain an even gear ratio leads to considerable limitations in terms of the required construction space, the effort and expense of manufacture, and the complexity of the construction of the assembled drive

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