US 11,746,900 B2
Automatic transmission
Narifumi Domen, Aki-gun (JP); Kenta Fukuchi, Aki-gun (JP); Kotaro Suzuki, Aki-gun (JP); Masanori Sasaki, Aki-gun (JP); Tomotaka Ishizaka, Aki-gun (JP); and Atsushi Abe, Aki-gun (JP)
Assigned to Mazda Motor Corporation, Hiroshima (JP)
Filed by Mazda Motor Corporation, Hiroshima (JP)
Filed on Nov. 11, 2021, as Appl. No. 17/454,506.
Claims priority of application No. 2021-012311 (JP), filed on Jan. 28, 2021.
Prior Publication US 2022/0235849 A1, Jul. 28, 2022
Int. Cl. F16H 57/10 (2006.01); F16H 63/34 (2006.01); F16H 57/028 (2012.01); F16H 3/66 (2006.01)
CPC F16H 63/34 (2013.01) [F16H 57/028 (2013.01); F16H 57/10 (2013.01); F16H 3/663 (2013.01); F16H 2200/006 (2013.01); F16H 2200/2012 (2013.01); F16H 2200/2023 (2013.01); F16H 2200/2043 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An automatic transmission, comprising:
a brake including:
a fixed-side cylindrical member spline-coupled to a transmission case;
a rotation-side cylindrical member coupled to a given rotating member;
a plurality of friction plates disposed between the fixed-side cylindrical member and the rotation-side cylindrical member, and including a fixed-side friction plate configured to be spline-engaged with the fixed-side cylindrical member and a rotation-side friction plate configured to be spline-engaged with the rotation-side cylindrical member; and
a piston configured to engage the plurality of friction plates; and
a shock absorbing member disposed between a spline part of the transmission case and a spline part of the fixed-side cylindrical member and configured to absorb impact when the fixed-side cylindrical member rotates relative to the transmission case, wherein the shock absorbing member includes:
a first shock absorbing member disposed between a tooth surface of the spline part of the transmission case at a first side in a rotational direction, and a tooth surface of the spline part of the fixed-side cylindrical member at a second side in the rotational direction; and
a second shock absorbing member disposed between a tooth surface of the spline part of the transmission case at the second side in the rotational direction, and a tooth surface of the spline part of the fixed-side cylindrical member at the first side in the rotational direction.