US 11,841,072 B2
Transverse cycloidal-pin gear pair and nutation deceleration device
Mei Shuai, Beijing (CN); and Xiaochun Wang, Beijing (CN)
Assigned to BEIJING INTELLIGENT DAAI ROBOT TECHNOLOGY CO., LTD., Beijing (CN)
Appl. No. 17/266,862
Filed by Beijing Intelligent Daai Robot Technology Co., Ltd., Beijing (CN)
PCT Filed Jul. 24, 2019, PCT No. PCT/CN2019/097517
§ 371(c)(1), (2) Date Feb. 8, 2021,
PCT Pub. No. WO2020/034816, PCT Pub. Date Feb. 20, 2020.
Claims priority of application No. 201810942688.3 (CN), filed on Aug. 17, 2018; and application No. 201910591871.8 (CN), filed on Jul. 1, 2019.
Prior Publication US 2021/0310552 A1, Oct. 7, 2021
Int. Cl. F16H 55/08 (2006.01); F16H 55/17 (2006.01)
CPC F16H 55/08 (2013.01) [F16H 55/17 (2013.01); F16H 2055/173 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A transverse cycloidal-pin gear pair for a nutation deceleration device, comprising:
a cycloidal gear having a cycloidal tooth flank, wherein a reference surface of the cycloidal gear and an axis of the cycloidal gear are angled at a first angle; and
a pin gear meshing with the cycloidal gear in a nutation transmission manner and having a pin tooth flank, wherein a reference surface of the pin gear and an axis of the pin gear are angled at a second angle; wherein,
the first angle and the second angle are both between 88° and 91°, and a sum of the first angle and the second angle is less than 180°, and
wherein portions of the pin tooth flank and the cycloidal tooth flank meshing therewith are pin gear working flank and cycloidal gear working flank, respectively, and a pressure angle between the pin gear working flank and the cycloidal gear working flank when meshing satisfies the following relationship:
45°−β−5°≤α≤45°−β+5°,
where α is the pressure angle, and β is a friction angle between the pin gear working flank and the cycloidal gear working flank.