# US 10,871,202 B2 · Inverted roller screw reduction gear

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- Number: US 10,871,202 B2
- Document ID: US10871202B2
- Status: Granted
- Kind: B2
- Application number: 16/092,157
- Filed: 2017-04-07
- Published: 2019-03-28
- Granted: 2020-12-22
- Earliest claimed: 2016-04-08
- Applicants: Joint Stock Company “Diakont”
- Inventors: Mikhail Evgenievich Fedosovsky; Vadim Igorevich Dunaev; Roman Vladimirovich Pustozerov
- Web page: https://patentgrep.com/patent/US10871202B2

## CPC

- F16H 1/28: with gears having orbital motion
- B25J 9/102: {Gears specially adapted therefor, e.g. reduction gears (gearings in general F16H)}
- F16H 25/04: for conveying rotary motion
- F16H 25/2252: {Planetary rollers between nut and screw}
- F16H: GEARING
- B25J: MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES ({manipulators specially adapted for use in surgery A61B34/70; manipulators used in cleaning hollow articles B08B9/04}; manipulators associated with rolling mills B21B39/20; manipulators associated with forging machines B21J13/10; {manipulators associated with picking-up and placing mechanisms B23P19/007}; means for holding wheels or parts thereof B60B30/00; {vehicles with ground-engaging propulsion means, e.g. walking members B62D57/02, B62D57/032; devices for picking-up and depositing articles or materials between conveyors B65G47/90, B65G47/91; manipulators with gripping or holding means for transferring packages B65H67/065}; cranes B66C; {manipulators used in the protection or supervision of pipe-line installations F17D5/00; walking equipment adapted for nuclear steam-generators F22B37/006}; manipulators specially adapted for, or associated with, nuclear reactors G21C; {apparatus used for handling wafers during manufacture or treatment of semiconductor H10P72/50})

## Abstract

A roller reducer comprises: an input member, a support member, an output member, and rollers, wherein the output member comprises output member nuts having a number of thread starts different from the number of thread starts on the support member nuts, wherein the rollers are arranged around the at least two support member nuts and the at least two output member nuts in such manner that each roller portion out of at least one pair of roller portions engages at least one of at least one of the support member nuts and at least one of the output member nuts.

## Claims

### Claim 1

A roller reducer comprising:
an input member comprising at least two input member nuts having inner multi-start threads of different directions, said nuts fixedly mounted with respect to each other,
a support member comprising at least two support member nuts having multi-start threads of different directions, said nuts fixedly mounted with respect to each other,
an output member comprising at least two output member nuts having multi-start threads of different directions, said nuts fixedly mounted with respect to each other,
wherein the output member nuts comprise a number of thread starts different from the number of thread starts on the support member nuts;
rollers comprising at least one pair of portions having threads of different directions;
wherein the multi-start threads of the support member nuts and of the output member nuts are arranged on the outer surface thereof,
the rollers are arranged around the at least two support member nuts and the at least two output member nuts in such manner that each roller portion out of the at least one pair of roller portions engages at least one of at least one of the support member nuts and at least one of the output member nuts, and
the at least two input member nuts are arranged around the rollers in such matter that the at least one pair of roller portions engages the threads of the input member nuts.

### Claim 2 (depends on 1)

The roller reducer according to claim 1, wherein the at least two input member nuts are formed integrally.

### Claim 3 (depends on 1)

The roller reducer according to claim 1, wherein the at least two output member nuts are formed integrally.

### Claim 4 (depends on 1)

The roller reducer according to claim 1, further comprising an output shaft arranged within the output member nuts and coupled thereto.

### Claim 5 (depends on 1)

The roller reducer according to claim 1, wherein the nut threads and the roller threads are pre-loaded.

### Claim 6 (depends on 1)

The roller reducer according to claim 1, wherein the rollers comprise at least two pairs of portions having threads of different directions.

### Claim 7 (depends on 6)

The roller reducer according to claim 6, wherein the thread diameter of one pair of portions differs from the thread diameter of the second pair of portions.