US 12,006,653 B2
Attachment for work machine
Shinji Yamashita, Hiroshima (JP); Ichiro Wada, Hiroshima (JP); and Tsuguhito Fujita, Hiroshima (JP)
Assigned to KOBELCO CONSTRUCTION MACHINERY CO., LTD., Hiroshima (JP)
Appl. No. 17/252,953
Filed by KOBELCO CONSTRUCTION MACHINERY CO., LTD., Hiroshima (JP)
PCT Filed Jun. 12, 2019, PCT No. PCT/JP2019/023292
§ 371(c)(1), (2) Date Dec. 16, 2020,
PCT Pub. No. WO2020/012858, PCT Pub. Date Jan. 16, 2020.
Claims priority of application No. 2018-132723 (JP), filed on Jul. 12, 2018.
Prior Publication US 2021/0189684 A1, Jun. 24, 2021
Int. Cl. B66C 23/64 (2006.01); E02F 3/36 (2006.01)
CPC E02F 3/369 (2013.01) [B66C 23/64 (2013.01); Y10T 403/59 (2015.01)] 4 Claims
OG exemplary drawing
 
1. An attachment of a work machine, the attachment comprising:
a first attachment body having a first connection end; and
a second attachment body having a second connection end connectable to the first connection end, wherein:
the first attachment body includes a first left side plate and a first right side plate that are disposed left and right, and a first connection plate interconnecting the first left side plate and the first right side plate in the first connection end;
the first left side plate includes a first left projecting portion that projects beyond the first connection plate toward the second connection end, and the first right side plate includes a first right projecting portion that projects beyond the first connection plate toward the second connection end;
the second attachment body includes a second left side plate and a second right side plate that are disposed left and right, a second connection plate interconnecting the second left side plate and the second right side plate in the second connection end, and a fitting pin extending in a left-right direction;
the second left side plate includes a second left projecting portion that projects beyond the second connection plate toward the first connection end, and the second right side plate includes a second right projecting portion that projects beyond the second connection plate toward the first connection end;
the second left projecting portion is formed with a left fitting pin insertion hole penetrating the second left projecting portion in the left-right direction, and the second right projecting portion is formed with a right fitting pin insertion hole penetrating the second right projecting portion in the left-right direction;
the fitting pin is inserted through the left fitting pin insertion hole and the right fitting pin insertion hole so as to have a left protruding portion protruding to the left outside of the first left projecting portion and a right protruding portion protruding to the right outside of the first right projecting portion;
the first left projecting portion is formed with a left notch having a shape opened so as to be able to receive the left protruding portion of the fitting pin radially of the fitting pin, and the first right projecting portion is formed with a right notch having a shape opened so as to be able to receive the right protruding portion of the fitting pin radially of the fitting pin;
an interval between the first left side plate and the first right side plate in the left-right direction is larger than an interval between the second left side plate and the second right side plate in the left-right direction;
the first attachment body and the second attachment body are configured to be connected to each other in a state where the first left projecting portion and the first right projecting portion are disposed on both outer sides of the second left projecting portion and the second right projecting portion in the left-right direction, respectively; the left protruding portion and the right protruding portion of the fitting pin are configured to be fitted with the left notch and the right notch, respectively, at respective positions on both outer sides of the second left projecting portion and the second right projecting portion in the left-right direction;
the first attachment body further includes a left auxiliary projecting plate and a right auxiliary projecting plate that project from the first connection plate toward the second connection end substantially parallel to the first left projecting portion and the first right projecting portion on respective inner sides of the first left projecting portion and the first right projecting portion in the left-right direction;
the left auxiliary projecting plate and the right auxiliary projecting plate are formed with a left auxiliary notch and a right auxiliary notch, respectively, each having a shape capable of receiving the fitting pin radially of the fitting pin; and
the first attachment body and the second attachment body are configured to be connected to each other in a state where the first left projecting portion and the first right projecting portion are disposed on both outer sides of the second left projecting portion and the second right projecting portion in the left-right direction and the left auxiliary projecting plate and the right auxiliary projecting plate are disposed on respective inner sides of the second left projecting portion and the second right projecting portion in the left-right direction, and configured such that the left projecting portion and the right protruding portion of the fitting pin are fitted with the left notch and the right notch, respectively, and respective inner portions of the fitting pin on respective inner sides of the second left projecting portion and the second right projecting portion in the left-right direction are fitted to the left auxiliary notch and the right auxiliary notch, respectively.