# US 10,767,737 B2 · Smart self-adaptive planetary transmission device with small tooth number difference

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- Number: US 10,767,737 B2
- Document ID: US10767737B2
- Status: Granted
- Kind: B2
- Application number: 16/073,765
- Filed: 2016-10-10
- Published: 2018-12-27
- Granted: 2020-09-08
- Earliest claimed: 2016-03-15
- Assignees: Cisdi Engineering Co., Ltd
- Applicants: Cisdi Engineering Co., Ltd.
- Inventors: Jingya Liu; Shusheng Wang; Xiaohua Peng; Wenjun Dai
- Web page: https://patentgrep.com/patent/US10767737B2

## CPC

- F16H 3/70: in which the central axis of the gearing lies inside the periphery of an orbital gear
- F16H 48/08: comprising bevel gears
- F16H 3/46: Gearings having only two central gears, connected by orbital gears (F16H3/68 - F16H3/78 take precedence)
- F16H 48/285: with self-braking intermeshing gears having parallel axes and having worms or helical teeth
- F16H 57/021: Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
- F16H 57/023: Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
- F16H: GEARING

## Abstract

A planetary transmission device with a small tooth number difference for implementing smart workload self-adaptation comprises a left planetary gear, a right planetary gear, a left-end disk, a right-end disk, a housing and a connection member. One end of the connection member axially run through the left planetary gear and the right planetary gear. End parts of both ends of the connection member are fixedly connected to the left-end disk and the right-end disk respectively. By means of a force closure mechanism, the transmission device can automatically and steplessly adjust a transmission ratio and an output rotation speed according to a change in load without depending on a measurement md control system, md has a simple structure and low costs.

## Claims

### Claim 1

A smart self-adaptive planetary transmission device with a tooth number difference, comprising a left planetary gear, a right planetary gear, a left-end disk, a right-end disk, a housing and a connection member, wherein an end of the connection member sequentially runs through the left planetary gear and the right planetary gear in an axial direction; end parts of both ends of the connection member are fixedly connected to the left-end disk and the right-end disk respectively; the left planetary gear is engaged with both a tooth profile on the left-end disk and a tooth profile on the housing; the right planetary gear is engaged with a tooth profile on the right-end disk and the tooth profile on the housing wherein the transmission device further comprises an input shaft and an output shaft; the input shaft is supported on the right-end disk through a first end surface bearing, and the input shaft is in transmission connection with the right planetary gear through a tumbler bearing; and the output shaft is supported on the left-end disk through the first end surface bearing, and the output shaft is in transmission connection with the left planetary gear through the tumbler bearing.

### Claim 2 (depends on 1)

The smart self-adaptive planetary transmission device with the tooth number difference according to claim 1, wherein an isolating sleeve is arranged between the tumbler bearing and the first end surface bearing.

### Claim 3 (depends on 1)

The smart self-adaptive planetary transmission device with the tooth number difference according to claim 1, wherein the housing, the left planetary gear and the right planetary gear are duplex gears.

### Claim 4 (depends on 3)

The smart self-adaptive planetary transmission device with the tooth number difference according to claim 3, wherein eccentric directions of the duplex gears on the left planetary gear and the right planetary gear have a difference of 180°.

### Claim 5 (depends on 4)

The smart self-adaptive planetary transmission device with the tooth number difference according to claim 4, wherein gear tooth profiles of the left-end disk are disposed on end surface that matches with the left planetary gear; and the right-end disk are disposed on end surfaces that matches with the right planetary gear.

### Claim 6 (depends on 5)

The smart self-adaptive planetary transmission device with the tooth number difference according to claim 5, wherein the duplex gears on the left planetary gear and the right planetary gear are external gears, and the gears disposed on the end surfaces of the left-end disk and the right-end disk are internal gears; or the gears on the left planetary gear engaged with the left-end disk and the gears on the right planetary gear engaged with the right-end disk are internal gears, and the gears disposed on the end surfaces of the left-end disk and the right-end disk are external gears.

### Claim 7 (depends on 1)

The smart self-adaptive planetary transmission device with the tooth number difference according to claim 1, wherein the connection member is a connection pin; one end of the connection pin axially runs through the left planetary gear and the right planetary gear, and both ends of the connection pin are fixedly connected to the left-end disk and the right-end disk respectively.

### Claim 8 (depends on 1)

The smart self-adaptive planetary transmission device with the tooth number difference according to claim 1, wherein the left-end disk and the right-end disk are respectively supported on the internal gears of the housing through a second end surface bearing.

### Claim 9

A smart self-adaptive planetary transmission device with a tooth number difference, comprising a left planetary gear, a right planetary gear, a left-end disk, a right-end disk, a housing and a connection member, wherein an end of the connection member sequentially runs through the left planetary gear and the right planetary gear in an axial direction; end parts of both ends of the connection member are fixedly connected to the left-end disk and the right-end disk respectively; the left planetary gear is engaged with both a tooth profile on the left-end disk and a tooth profile on the housing; the right planetary gear is engaged with a tooth profile on the right-end disk and the tooth profile on the housing; wherein the left planetary gear, the right planetary gear, the left-end disk, the right-end disk and the housing form a force closure mechanism, tooth number relationships of the gears on the force closure mechanism are:
(z1z23−z21z32)(z4−z54)(z54+z53)=(z4z53−z54z35)(z1−z31)(z21+z23);
z32=z1−z21+z23;
z35=z4−z54+z53;
wherein z1 is the tooth number of the gems on the right-end disk; z21 is the tooth number of the gems, engaged with the right-end disk, on the right planetary gear; z23 is the tooth number of the gems, engaged with the housing, on the right planetary gear; z32 is the tooth number of the gems, engaged with the right planetary gear, on the housing; z35 is the tooth number of the gears, engaged with the left planetary gear, on the housing; z4 is the tooth number of the gears on the left-end disk; z53 is the tooth number of the gears, engaged with the housing, on the left planetary gear, and z54 is the tooth number of the gems, engaged with the left-end disk, on the left planetary gear.