公开(公告)号：WO2022159189A1

公开(公告)日：2022-07-28

申请号：PCT/US2021/062317

申请日：2021-12-08

Applicant: CATERPILLAR INC.

Inventor： JONES, Benjamin I. ,  KIESEL, Mark J. ,  LOEFFLER, Brian K.

IPC: B62D55/21

Abstract: A track chain assembly (126) includes a first track pad (200, 200a) including a first pair of lugs (232, 234) defining a gap (236) therebetween, and a second track pad (200, 200a) including an intermediate lug (230) disposed in the gap (236). The first pair of lugs (232, 234) and the intermediate lug (230) each define a concentric bore (206, 206a), defining an axis of rotation (132) for a pinned joint (138) of the track chain assembly (126), and the concentric bore (206, 206a) of one of the first pair of lugs (232, 234) is in communication with the gap (236) with a first blend (238) disposed axially between the gap (236) and the concentric bore.