US 12,352,338 B2
Multi-speed transmission
Taku Matsuo, Tokyo (JP); Nobuhito Yasuta, Tokyo (JP); Masaki Shiohara, Tokyo (JP); and Michihiro Aida, Tokyo (JP)
Assigned to KOMATSU LTD., Tokyo (JP)
Appl. No. 18/702,882
Filed by KOMATSU LTD., Tokyo (JP)
PCT Filed Oct. 4, 2022, PCT No. PCT/JP2022/037059
§ 371(c)(1), (2) Date Apr. 19, 2024,
PCT Pub. No. WO2023/079886, PCT Pub. Date May 11, 2023.
Claims priority of application No. 2021-181038 (JP), filed on Nov. 5, 2021.
Prior Publication US 2024/0410448 A1, Dec. 12, 2024
Int. Cl. F16D 25/0638 (2006.01); F16H 3/66 (2006.01)
CPC F16H 3/66 (2013.01) [F16H 2200/2012 (2013.01); F16H 2200/2046 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A multi-speed transmission comprising:
an input member;
an output member;
not more than four planetary gear sets including a first planetary gear set, a second planetary gear set, a third planetary gear set and a fourth planetary gear set that are arranged in order in an axial direction from the input member toward the output member, each of the planetary gear sets including a sun gear, a planetary carrier, and a ring gear;
an intermediate coupling member that couples the sun gear of the first planetary gear set, the ring gear of the second planetary gear set, and the sun gear of the fourth planetary gear set to one another; and
not more than six control elements, wherein
each of the not more than six control elements is operatively coupled to at least one planetary gear set of the not more than four planetary gear sets, and selectively engageable to produce a set of different gear ratios between the input member and the output member, the set of different gear ratios including at least ten forward gear ratios and at least two reverse gear ratios, and
one control element of the not more than six control elements selectively couples the sun gear of the third planetary gear set to the planetary carrier of the fourth planetary gear set.