US 11,982,068 B2
Working machine
Hiroshi Horii, Sakai (JP)
Assigned to KUBOTA CORPORATION, Osaka (JP)
Filed by KUBOTA CORPORATION, Osaka (JP)
Filed on Jun. 9, 2020, as Appl. No. 16/896,581.
Application 16/896,581 is a continuation of application No. PCT/JP2018/039319, filed on Oct. 23, 2018.
Claims priority of application No. 2017-246320 (JP), filed on Dec. 22, 2017.
Prior Publication US 2020/0299928 A1, Sep. 24, 2020
Int. Cl. E02F 3/32 (2006.01); E02F 9/12 (2006.01)
CPC E02F 9/121 (2013.01) [E02F 9/125 (2013.01); E02F 9/126 (2013.01); E02F 3/325 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A working machine comprising:
a traveling device having a traveling frame;
a turn base plate supported on the traveling frame and configured to turn around an axis extending in a vertical direction, the turn base plate having an opening portion through which the axis extends; and
a swivel joint including:
an outer sleeve fixed to the turn base plate; and
an inner shaft inserted to the opening portion and inserted to the outer sleeve so as to rotate about the axis, the inner shaft being configured to restrictively rotate with respect to the traveling frame,
wherein the outer sleeve has
a sleeve body,
a lower member fixed to a lower portion of the sleeve body, and
an upper member fixed to an upper portion of the sleeve body,
wherein the lower member is independent of the sleeve body and is fixed to the lower portion of the sleeve body by at least one bolt,
wherein the upper member is independent of the sleeve body and is fixed to the upper portion of the sleeve body by at least one bolt,
wherein the lower member has
a flange portion fixed to an upper surface of the turn base plate on a periphery of the opening portion and covering the opening portion, and
an insertion portion formed integrally with the flange portion and inserted into the opening portion,
wherein the outer sleeve has, in an outer circumferential surface thereof, first connection ports to which pipes are connected,
wherein the inner shaft has, in a lower surface thereof, second connection ports communicating with the first connection ports, and
wherein the flange portion has an outer diameter larger than an inner diameter of the opening portion.