US 12,084,842 B2
Evaluation system for work machine and evaluation method for work machine
Tatsuro Miyoshi, Tokyo (JP); and Tsuyoshi Kobayashi, Tokyo (JP)
Assigned to KOMATSU LTD., Tokyo (JP)
Appl. No. 17/622,332
Filed by KOMATSU LTD., Tokyo (JP)
PCT Filed Jul. 8, 2020, PCT No. PCT/JP2020/026672
§ 371(c)(1), (2) Date Dec. 23, 2021,
PCT Pub. No. WO2021/010248, PCT Pub. Date Jan. 21, 2021.
Claims priority of application No. 2019-130552 (JP), filed on Jul. 12, 2019.
Prior Publication US 2022/0251808 A1, Aug. 11, 2022
Int. Cl. E02F 9/26 (2006.01); G01L 5/12 (2006.01); G05B 23/02 (2006.01)
CPC E02F 9/267 (2013.01) [G01L 5/12 (2013.01); G05B 23/0283 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An evaluation system for a work machine, the evaluation system comprising:
a work implement;
a support unit for the work implement;
an operational unit for the work implement that is operatively supported by the support unit;
a cylinder that causes the work implement to move with respect to the support unit; and
a controller that calculates an axial force of the cylinder and evaluates a degree of fatigue of the support unit based on the axial force of the cylinder,
wherein the support unit includes:
a pair of longitudinal plates holding the operational unit between the longitudinal plates to support the operational unit; and
a bridge plate spanning between the longitudinal plates, and
wherein the longitudinal plates and the bridge plate are welded together.