Joint actuator and two-stage planetary reduction transmission mechanism thereof

Through the two-stage planetary reduction transmission mechanism, the problem of the increase in the radial size of the planetary reducer under large transmission ratio is solved, and joint actuators with large transmission ratio and small radial size are realized, which are suitable for a variety of application scenarios.

CN120368003APending Publication Date: 2025-07-25CHONGQING BEIDA LANDAI AUTOMOBILE TRANSMISSION CO LTD
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Patent Information

Application Number
CN202510721648.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-30
Publication Date
2025-07-25

AI Technical Summary

Technical Problem

When existing planetary reducers achieve a larger transmission ratio, their radial size increases, limiting their application in space-constrained scenarios.

Method used

A two-stage planetary reduction transmission mechanism is adopted, including a first-stage planetary transmission mechanism and a second-stage planetary transmission mechanism. The first-stage ring gear and the second-stage ring gear are rotated simultaneously by a fixed sleeve, and the sleeve is set in the central through hole of the stator. The two-stage deceleration is achieved by combining the meshing of the first-stage planetary wheel and the first-stage sun gear, and the second-stage planetary wheel and the second-stage sun gear.

Benefits of technology

Achieve the requirements of a larger transmission ratio, reduce the radial and axial dimensions, flexibly adjust the transmission ratio and load capacity, and meet the needs of different application scenarios.

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Abstract

The invention discloses a two-stage planetary reduction transmission mechanism which comprises a first-stage planetary transmission mechanism and a second-stage planetary transmission mechanism. The first-stage planetary transmission mechanism comprises a first-stage sun gear and a first-stage gear ring; a plurality of first-stage planet gears and a first-stage planet carrier for mounting the first-stage planet gears are arranged between the first-stage sun gear and the first-stage gear ring; the first-stage planet gear is respectively meshed with the first-stage sun gear and the first-stage gear ring; the second-stage planetary transmission mechanism comprises a second-stage sun gear and a second-stage gear ring; a plurality of second-stage planet gears and a second-stage planet carrier for mounting the second-stage planet gears are arranged between the second-stage sun gear and the second-stage gear ring; the second-stage planet gear is respectively meshed with the second-stage sun gear and the second-stage gear ring; the fixing sleeve is arranged outside the first-stage gear ring and the second-stage gear ring in a sleeving mode, and the first-stage gear ring and the second-stage gear ring are in synchronous running fit with the fixing sleeve; the first-stage sun gear and the second-stage sun gear can rotate around the axis of the first-stage sun gear and the axis of the second-stage sun gear respectively. The invention further discloses a joint actuator.
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