Reduction gear, drive arrangement and method for operating such a drive arrangement

The reduction gear design with three stages and convex-concave flank pairing addresses the challenge of high torque and gear ratio in robot arms, achieving efficient and precise pivoting.

DE102025101674B3Active Publication Date: 2026-05-28ZF FRIEDRICHSHAFEN AG
View PDF 2 Cites 0 Cited by

Patent Information

Application Number
DE102025101674
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Filing Date
2025-01-17
Publication Date
2026-05-28
Estimated Expiration
2045-01-17

AI Technical Summary

Technical Problem

Existing reduction gears struggle to achieve high torque transmission with the simplest possible design and high gear ratios in a compact form, particularly for use in robot arms, while maintaining high angular accuracy.

Method used

A reduction gear design comprising three stages, including a first and second planetary gear set with a common ring gear and a third reduction stage using a pinion and ring gear with convex-concave flank pairing, along with a torsionally rigid connection, to enhance torque transmission and reduce flank pressure.

Benefits of technology

The design achieves higher gear ratios and lower flank pressure, allowing for precise and efficient torque transmission with reduced backlash, enabling accurate pivoting of robot arms.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure 00000000_0000_ABST
    Figure 00000000_0000_ABST
Patent Text Reader

Abstract

The invention relates to a reduction gear (10, 20) comprising a first reduction stage (11, 21), a second reduction stage (12, 22), and a third reduction stage (13, 23). The first reduction stage (11, 21) is designed as a first planetary gear set (110) with a driven first sun gear (111), a first carrier (112), and a first ring gear (113), wherein first planet gears (114) are mounted on the first carrier (112), each engaging with the first sun gear (111) and the first ring gear (113). The second reduction stage (12) is designed as a second planetary gear set (120) with a second sun gear (121), a second carrier (122), and a second ring gear (123). Second planet gears (124) are mounted on the second bridge (122), each engaging with the second sun gear (121) and the second ring gear (123). The second sun gear (121) is connected to the first bridge (112) in a rotationally fixed manner.The third reduction stage (13) has a pinion (131, 231) that is rotationally fixed to the second web (122). The pinion (131, 231) engages with a third ring gear (31, 41). Furthermore, a drive arrangement (1) comprising two such reduction gears (10, 20) is proposed. Finally, a method for operating such a drive arrangement (1) is described.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • multi-stage reduction gear

    DE102006046581A1

  • Control device for a ship's propulsion system

    DE102008042599A1