US 12,403,954 B2
Crawler-type work machine
Naoya Akiyama, Tokyo (JP); Takeshi Yoshikawa, Tokyo (JP); and Hiroaki Takeshima, Tokyo (JP)
Assigned to KOMATSU LTD., Tokyo (JP)
Appl. No. 17/918,167
Filed by KOMATSU LTD., Tokyo (JP)
PCT Filed Jun. 15, 2021, PCT No. PCT/JP2021/022729
§ 371(c)(1), (2) Date Oct. 11, 2022,
PCT Pub. No. WO2022/024573, PCT Pub. Date Feb. 3, 2022.
Claims priority of application No. 2020-129004 (JP), filed on Jul. 30, 2020.
Prior Publication US 2023/0136679 A1, May 4, 2023
Int. Cl. B62D 11/08 (2006.01); E02F 9/02 (2006.01); E02F 9/20 (2006.01); F16H 57/04 (2010.01)
CPC B62D 11/08 (2013.01) [E02F 9/02 (2013.01); E02F 9/202 (2013.01); F16H 57/0486 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A crawler-type work machine comprising:
an engine;
a transmission configured to transmit power from the engine;
an input shaft arranged to receive power transmitted from the transmission;
a planetary gear mechanism disposed between the input shaft and an output shaft;
a steering clutch configured to switch between transmitting and blocking a rotational force from the input shaft to the output shaft by the planetary gear mechanism;
a steering brake configured to brake a rotation of the output shaft;
a hydraulic pump configured to discharge a lubricating oil;
a first oil channel configured to guide a portion of the lubricating oil discharged by the hydraulic pump to the steering brake;
a second oil channel configured to guide a portion of the lubricating oil discharged by the hydraulic pump to the planetary gear mechanism;
a third oil channel configured to guide at least a portion of the lubricating oil that has passed through the planetary gear mechanism to the steering brake;
a fourth oil channel configured to guide a portion of the lubricating oil discharged by the hydraulic pump to the steering clutch; and
a fifth oil channel configured to guide at least a portion of the lubricating oil that has passed through the steering clutch to the steering brake,
at least a portion of the planetary gear mechanism being disposed further inside than the steering brake in a radial direction perpendicular to a center axis of the input shaft.