US 12,276,082 B2
Working vehicle
Hiroshi Horii, Osaka (JP)
Assigned to KUBOTA CORPORATION, Osaka (JP)
Filed by KUBOTA CORPORATION, Osaka (JP)
Filed on Jun. 13, 2022, as Appl. No. 17/838,376.
Application 17/838,376 is a continuation of application No. PCT/JP2020/048528, filed on Dec. 24, 2020.
Claims priority of application No. 2019-238287 (JP), filed on Dec. 27, 2019; and application No. 2019-238289 (JP), filed on Dec. 27, 2019.
Prior Publication US 2022/0307222 A1, Sep. 29, 2022
Int. Cl. E02F 9/08 (2006.01); B60K 11/04 (2006.01); F28F 13/14 (2006.01); F28D 1/053 (2006.01)
CPC E02F 9/0866 (2013.01) [B60K 11/04 (2013.01); E02F 9/0883 (2013.01); F28F 13/14 (2013.01); F28D 1/05316 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A working machine comprising:
a cooling fan; and
a first cooling device and a second cooling device that are disposed in series in a flow passage of cooling air that is generated by the cooling fan,
wherein the first cooling device is disposed upstream of the second cooling device in a direction of flow of the cooling air, and has a heat-exchange suppressing portion that is provided at a portion corresponding to a region near a rotation center of the cooling fan and that suppresses heat exchange between the cooling air and a fluid that flows in the first cooling device,
wherein the first cooling device has a first tank and a second tank that are disposed in parallel so as to be spaced from each other, and a plurality of tubes that cause the first tank and the second tank to communicate with each other and that are provided so as to be spaced from each other in a longitudinal direction of the first tank and the second tank, the first cooling device being configured to cause a fluid that is to be cooled to flow into one of the first tank and the second tank and to flow out of the other of the first tank and the second tank, and the first cooling device has a heat-dissipating portion where a fin for heat-dissipation is provided, and a non-heat-dissipating portion where the fin is not provided,
wherein the heat-dissipating portion includes the fin between adjacent ones of the tubes, and
wherein the non-heat-dissipating portion has a cooling-air flow passage where the fin is not provided between adjacent one of the tubes, and the non-heat-dissipating portion serves as the heat-exchange suppressing portion.