US 12,404,927 B1Granted

Cycloid speed reducer assembly

AssigneeDelta Electronics, Inc.

InventorsChi-Wen Chung, Wei-Ying Chu, Chin-Hsiang Chen

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Abstract

A cycloid speed reducer assembly is disclosed for optimizing the component structure. The accommodation space required for the sealing element is integrated into the track ring to save the material costs and significantly reduce the overall volume. A spacer ring placed between the front and rear bearings is used to adjust the clearances of the front bearing and the rear bearing to facilitate the quantitative production and control the yield. Since the compact structure of the cycloid speed reducer assembly includes two output ends, it facilitates to arrange an encoder between the speed reducer and the motor for closed-loop feedback control, so as to improve the control accuracy of the system. With the hollow input shaft, dual encoder applications can be realized. When a flexible structure is added to the output end, the flexible structure can be connected to another encoder to further realize the application of the torque sensor.

Claims15

Dependent claims

A cycloid speed reducer assembly, comprising:

a cycloid speed reducer comprising:
an input shaft arranged along an axial direction and configured to connect a motor to receive a power input;
a cycloidal gear plate comprising a shaft hole and an outer tooth portion, wherein the shaft hole passes through the cycloidal gear plate along the axial direction, and is configured to be passed through by the input shaft, and the outer tooth portion is disposed on an outer periphery of the cycloidal gear plate;
a roller wheel assembly sleeved on the cycloidal gear plate and comprising a plurality of rollers spatially corresponding to the outer tooth portion of the cycloidal gear plate;
and
an output plate arranged adjacent to the motor along the axial direction and connected to the cycloidal gear plate through an eccentric transmission shaft, wherein when the input shaft drives the outer tooth portion of the cycloidal gear plate to engage with the corresponding rollers of the roller wheel assembly, the cycloid gear plate is rotated with the eccentric transmission shaft, so that the output plate is driven by the eccentric transmission shaft to rotate, wherein the output plate comprises a first output plate and a second output plate, the first output plate and the second output plate are respectively located on two opposite outer sides of the roller wheel assembly, and each provides a power output, respectively, wherein the first output plate faces the motor, a first encoder module is disposed between the first output plate and the motor and configured to measure a rotation of the first output plate for feedback control;
and
a second encoder module disposed at a rear end of the motor and configured to measure a rotation speed of the second output plate or a rotation speed of a driving shaft of the motor for feedback control.

5 more elements

A cycloid speed reducer assembly, comprising:

a motor comprising a driving shaft configured to provide a power input;
a cycloid speed reducer spatially corresponding to the motor and comprising:
an input shaft arranged along an axial direction and configured to connect the driving shaft of the motor to receive the power input;
a cycloidal gear plate comprising a shaft hole and an outer tooth portion, wherein the shaft hole passes through the cycloidal gear plate along the axial direction, and is configured to be passed through by the input shaft, and the outer tooth portion is disposed on an outer periphery of the cycloidal gear plate;
a roller wheel assembly sleeved on the cycloidal gear plate and comprising a plurality of rollers spatially corresponding to the outer tooth portion of the cycloidal gear plate;
and
a first output plate and a second output plate respectively located on two opposite outer sides of the roller wheel assembly and arranged adjacent to the motor along the axial direction, and connected to the cycloidal gear plate through an eccentric transmission shaft, wherein the first output plate faces the motor, wherein when the input shaft drives the outer tooth portion of the cycloidal gear plate to engage with the corresponding rollers of the roller wheel assembly, the cycloid gear plate is rotated with the eccentric transmission shaft, so that the first output plate and the second output plate are respectively driven by the eccentric transmission shaft to rotate, and each of the first output plate and the second output plate provides a power output;
a first encoder module disposed between the first output plate and the motor, and configured to measure a rotation of the first output plate for feedback control;
and
a second encoder module disposed at a rear end of the motor and configured to measure a rotation speed of the second output plate or a rotation speed of the driving shaft of the motor for feedback control.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/825,961Filed 5 Sep 2024 · us provisional application
Priority: CN 202411127813.716 Aug 2024
Granted: 2 Sep 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

F16H 61/0006
Arrangement or mounting of elements of the control apparatus, e.g. valve assemblies or snapfittings of valves; Arrangements of the control unit…
F16H 1/32
With gears having orbital motion: in which the central axis of the gearing lies inside the periphery of an orbital gear
F16H 57/021
Gearboxes; Mounting gearing therein: shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
F16H 63/50
Comprising signals other than signals for actuating the final output mechanisms: signals to an engine or motor