# US 10,865,853 B2 · Multi-crankshaft cycloidal pin wheel reducer

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,865,853 B2
- Document ID: US10865853B2
- Status: Granted
- Kind: B2
- Application number: 16/204,768
- Filed: 2018-11-29
- Published: 2019-10-31
- Granted: 2020-12-15
- Earliest claimed: 2018-04-25
- Assignees: Shenzhen Llmachineco., Ltd
- Applicants: Shenzhen Llmachineco., Ltd
- Inventors: Xianhong Cao
- Web page: https://patentgrep.com/patent/US10865853B2

## CPC

- F16H 1/32: in which the central axis of the gearing lies inside the periphery of an orbital gear
- F16C 2361/61: Toothed gear systems, e.g. support of pinion shafts
- F16H 55/10: Constructively simple tooth shapes, e.g. shaped as pins, as balls
- F16H 2001/323: {comprising eccentric crankshafts driving or driven by a gearing}
- F16H 2001/324: {comprising two axially spaced, rigidly interconnected, orbital gears}
- F16H 2001/325: {comprising a carrier with pins guiding at least one orbital gear with circular holes}
- F16H: GEARING
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS

## Abstract

Disclosed is a multi-crankshaft cycloidal pin wheel reducer. The gland and the wheel base are fixedly connected by a connecting shaft through screws and are rotated by the main bearing, coaxially with the pin gear shell, with intermediate crankshaft and pin gear shell and roller pin constitutes a cycloidal pin wheel together with the first and second cycloidal to form a rotating pair connection respectively. The plurality of planetary bearings are provided on inner rings of the gland and the wheel base, with the planetary crankshafts being mounted between each pair of the planetary bearings. The planetary crankshafts are coupled with the first cycloidal wheel and the second cycloidal wheel, respectively through the eccentric bearing, to form a rotating pair connection, so as to form a multi-crankshaft force transmission structure. It has the advantages of smooth operation, low noise, high efficiency, and small angular transmission error.

## Claims

### Claim 1

A multi-crankshaft cycloidal pin wheel reducer, including a gland, a first cycloidal wheel, an intermediate crankshaft, a plurality of planetary bearings, planetary crankshafts, a pin gear shell, a second cycloidal wheel, a connecting shaft, a wheel base, an intermediate eccentric bearing, an intermediate bearing, a planetary eccentric bearing, a main bearing, and roller pins, characterized in that:
the gland and the wheel base are fixedly connected by the connecting shaft through screws and are rotated by the main bearing coaxially with the pin gear shell,
the intermediate crankshaft is coaxial with the gland or the wheel base, and as an output shaft of the reducer, constitutes a cycloidal pin wheel transmission structure together with the first cycloidal wheel, the second cycloidal wheel, the pin gear shell, and the roller pins,
the intermediate crankshaft is coupled with the gland and the wheel base through the intermediate bearing to form a rotating pair connection, and is coupled with the first cycloidal wheel and the second cycloidal wheel through the intermediate eccentric bearing to form a rotating pair connection,
the plurality of planetary bearings are provided on inner rings of the gland and the wheel base, each of the planetary crankshafts being mounted between a corresponding pair of the plurality of planetary bearings, and
the planetary crankshafts are coupled with the first cycloidal wheel and the second cycloidal wheel, respectively through the planetary eccentric bearing, to form a rotating pair connection, so as to form a multi-crankshaft force transmission structure,
wherein the planetary eccentric bearing, between the planetary crankshafts and the first cycloidal wheel and between the planetary crankshafts and the second cycloidal wheel, is a roller pin bearing without inner and outer rings.

### Claim 2 (depends on 1)

The multi-crankshaft cycloidal pin wheel reducer according to claim 1, characterized in that, at least two of the planetary crankshafts are evenly distributed around the intermediate crankshaft.

### Claim 3 (depends on 1)

The multi-crankshaft cycloidal pin wheel reducer according to claim 1, characterized in that, the main bearing is an angular contact ball bearing, mounted in a back-to-back manner.

### Claim 4 (depends on 1)

The multi-crankshaft cycloidal pin wheel reducer according to claim 1, characterized in that, the intermediate eccentric bearing and the planetary eccentric bearing are roller pin bearings having a holder but without inner and outer rings.

### Claim 5 (depends on 1)

The multi-crankshaft cycloidal pin wheel reducer according to claim 1, characterized in that, the roller pins are mounted on an inner side of the pin gear shell, and the number of roller pins is one more than the teeth of the first cycloidal wheel or the second cycloidal wheel.