US 11,866,905 B2
Linkage for arm assembly with reduced weld fatigue
Daniel T. Unger, Yorkville, IL (US); Ramanagarajan Meenakshinathan, Chennai (IN); and Kort C. Randall, Oro Valley, AZ (US)
Assigned to Caterpillar Global Mining LLC, Tucson, AZ (US)
Filed by Caterpillar Global Mining LLC, Tucson, AZ (US)
Filed on Mar. 12, 2021, as Appl. No. 17/200,352.
Prior Publication US 2022/0290398 A1, Sep. 15, 2022
Int. Cl. E02F 3/38 (2006.01); E02F 3/36 (2006.01)
CPC E02F 3/3663 (2013.01) [E02F 3/38 (2013.01); E02F 3/3636 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A work machine, comprising:
a frame;
a traction system supporting the frame;
an arm assembly having a first end and a second end, the first end being connected to the frame,
an implement connected to the second end; and
a linkage connecting the implement to the second end of the arm assembly, the linkage having a pin-supporting section configured to accept a pin, and a linking section attached to the pin-supporting section by a weld, the linking section formed from a linking body with a separate side plate attached to each side of the linking body, the linking section having a recess proximate the weld being located on an outside surface of the separate side plate, the recess having a height extending in the same direction of the linking section, and the height is less than 50% of the overall length of the linking section.