US 11,852,221 B2
Planetary gear assembly
Hung-Jung Chiang, Taichung (TW)
Assigned to REXON INDUSTRIAL CORP., LTD., Taichung (TW)
Filed by REXON INDUSTRIAL CORP., LTD., Taichung (TW)
Filed on Mar. 9, 2023, as Appl. No. 18/181,294.
Claims priority of application No. 111110132 (TW), filed on Mar. 18, 2022.
Prior Publication US 2023/0296161 A1, Sep. 21, 2023
Int. Cl. F16H 3/62 (2006.01); F16H 1/32 (2006.01); B60K 17/04 (2006.01); F16H 1/28 (2006.01)
CPC F16H 3/62 (2013.01) [F16H 1/32 (2013.01); B60K 17/046 (2013.01); F16H 2001/2881 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A planetary gear assembly, comprising:
a wheel hub that surrounds an axis, and that has an end face and a plurality of engaging recesses formed in said end face; and
a planetary gear reducer mechanism that includes
a sun gear disposed on and rotatable about the axis,
a plurality of planet gears surrounding said sun gear, being angularly spaced apart from each other, and meshing with said sun gear,
a first ring gear being stationary relative to and meshing with said planet gears, and including a first inner surface that surrounds the axis and a plurality of first inward-facing teeth that are arranged on said first inner surface and that engage teeth of said planetary gears, and
a second ring gear arranged between said wheel hub and said first ring gear along the axis and meshing with said planet gears, said second ring gear including a second inner surface that surrounds the axis, a plurality of second inward-facing teeth that are arranged on said second inner surface and that engage said teeth of said planet gears, a wheel-hub-facing face that is transverse to said second inner surface, that surrounds the axis, and that faces said end face of said wheel hub, and a plurality of joining protrusions that are disposed on said wheel-hub-facing face and that are respectively complementary in shape with and respectively engage said engaging recesses.