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US 12,276,082 B2Granted
Working vehicle
AssigneeKubota Corporation
InventorHiroshi Horii
Life of this patent
Estimating the term…
Abstract
A working machine includes 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. 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 in a rotation center vicinity of the cooling fan and that suppresses heat exchange between the cooling air and a fluid that flows in the first cooling device.
Claims5
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.
4 more elements
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 device for fluid-cooling and a second device for fluid-cooling that are disposed so as to be spaced from each other,
- a first connection tube that connects one end of the first device and one end of the second device to each other, and
- a second connection tube that connects the other end of the first device and the other end of the second device to each other,
- wherein the heat-exchange suppressing portion has an opening portion between the first device and the second device and between the first connection tube and the second connection tube.
6 more elements
Dependencies are inferred from the claim text.