Gear, deceleration device, robot, and moving object

Patent metadata

Field	Value
Publication number	US-11014155-B2
Application number	US-201715637226-A
Country	US
Kind code	B2
Filing date	Jun 29, 2017
Priority date	Jul 6, 2016
Publication date	May 25, 2021
Grant date	May 25, 2021

Abstract

A gear includes a sintered body, in which Fe is contained as a principal component, Ni is contained in a proportion of 2 mass % or more and 20 mass % or less, Si is contained in a proportion of 0.3 mass % or more and 5.0 mass % or less, C is contained in a proportion of 0.005 mass % or more and 0.3 mass % or less, and one element selected from the group consisting of Ti, V, Y, Zr, Nb, Hf, and Ta is defined as a first element, that is contained in a proportion of 0.01 mass % or more and 0.7 mass % or less.

First claim

What is claimed is:

1. A gear, comprising a sintered body having a composition consisting of:
Fe is contained as a principal component,
Ni is contained in a proportion of 2 to 20 mass %,
Si is contained in a proportion of 0.3 to 5.0 mass %,
C is contained in a proportion of 0.005 to 0.3 mass %,
Hf is contained in a proportion of 0.01 to 0.7 mass %;
Nb in a proportion of 0.01 to 0.7 mass %; and
Zr in a proportion of up to 0.7 mass %.

2. The gear according to claim 1 , wherein when a ratio X1/X2 of a value X1 which is obtained by dividing a content E1 of either Hf or Zr by the mass number of either Hf or Zr to a value X2 which is obtained by dividing a content E2 of Nb by the mass number of Nb is 0.3 to 3.

3. The gear according to claim 1 , wherein the sum of the content of either Hf or Zr and the content of Nb is 0.05 to 0.8 mass %.

4. A deceleration device, comprising the gear according to claim 1 .

5. A deceleration device, comprising the gear according to claim 2 .

6. A deceleration device, comprising the gear according to claim 3 .

7. A robot, comprising a power transmission section including the gear according to claim 1 .

8. A robot, comprising a power transmission section including the gear according to claim 2 .

9. A robot, comprising a power transmission section including the gear according to claim 3 .

10. A moving object, comprising a power transmission section including the gear according to claim 1 .

11. A moving object, comprising a power transmission section including the gear according to claim 2 .

12. A moving object, comprising a power transmission section including the gear according to claim 3 .

Assignees

• Seiko Epson Corp

Inventors

• Nakamura Hidefumi

Classifications

• B22F1/00 Primary

  Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties · CPC title

• B22F5/08 Primary

  of toothed articles, e.g. gear wheels; of cam discs · CPC title

• B22F2998/10

  Processes characterised by the sequence of their steps · CPC title

• C22C33/0264

  the maximum content of each alloying element not exceeding 5% · CPC title

• B22F3/162

  Machining, working after consolidation · CPC title