# US 11,299,033 B2 · Work machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,299,033 B2 - Document ID: US11299033B2 - Status: Granted - Kind: B2 - Application number: 16/651,406 - Filed: 2019-02-27 - Published: 2020-09-10 - Granted: 2022-04-12 - Earliest claimed: 2018-02-28 - Assignees: Komatsu Ltd. - Applicants: Komatsu Ltd. - Inventors: Masahiro Ikeda; Kazuya Imamura - Web page: https://patentgrep.com/patent/US11299033B2 ## CPC - B60K 11/06: with air cooling - B60K 11/04: Arrangement or mounting of radiators, radiator shutters, or radiator blinds - B60K 11/08: Air inlets for cooling; Shutters or blinds therefor - E02F 9/00: Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00 (laying-out or take-up devices for trailing electric cables B66C) - F01P 3/18: Arrangements or mounting of liquid-to-air heat-exchangers (such arrangements on cylinders or cylinder heads F01P3/04; relative to vehicles B60K11/04) - F01P 11/10: Guiding or ducting cooling-air, to, or from, liquid-to-air heat exchangers - B60K 11/02: with liquid cooling - B60Y 2200/412: Excavators - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00) - F01P: COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES (arrangements in connection with cooling of propulsion units in vehicles B60K11/00; heat-transfer, heat-exchange or heat-storage materials C09K5/00; {cooling of gas-turbine engines F02C7/12}; heat exchange in general, radiators F28) - B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY ## Abstract A work machine includes a first cooling unit that protrudes from a first wall surface at a first position of a main flow path and defines a first opening portion between the second wall surface and the first cooling unit; a second cooling unit that protrudes from the second wall surface on a downstream side of the first position in the flow path direction of the main flow path, defines a second opening portion between the first wall surface and the second cooling unit and partly overlaps with the first cooling unit when viewed from the flow path direction; and partition member that defines a first section flow path having the first cooling unit as an inlet and the second opening portion as an outlet and a second section flow path having the first opening portion as an inlet and the second cooling unit as an outlet. ## Claims ### Claim 1 A work machine comprising: a work machine main body having a first wall surface and an opposing second wall surface defining a space therebetween which is a main flow path for air; a fan for allowing air to flow along a flow path direction which is a direction in which the main flow path extends; a first cooling unit that protrudes from the first wall surface so as to be perpendicular to the flow path direction and defines a first opening portion between the first cooling unit and the second wall surface, at a first position in the flow path direction of the main flow path; a second cooling unit that protrudes from the second wall surface so as to be perpendicular to the flow path direction and defines a second opening portion between the first wall surface and the second cooling unit along with partially overlapping the first cooling unit when viewed from the flow path direction, at a second position downstream of the first position in the flow path direction of the main flow path; and a partition member that is provided across an end portion of the first cooling unit on the second wall surface side and an end portion of the second cooling unit on the first wall surface side and defines a first section flow path having the first cooling unit as an inlet and the second opening portion as an outlet, and a second section flow path having the first opening portion as an inlet and the second cooling unit as an outlet. ### Claim 2 (depends on 1) The work machine according to claim 1, wherein the first cooling unit has a communication hole through which air flows in a direction coinciding with a thickness direction of the first cooling unit; and the second cooling unit has a communication hole through which air flows in a direction coinciding with a thickness direction of the second cooling unit. ### Claim 3 (depends on 2) The work machine according to claim 2, wherein a flow path cross-sectional area of the first section flow path decreases from the inlet toward the outlet, and the flow passage cross-sectional area of the second section flow path increases from the inlet toward the outlet. ### Claim 4 (depends on 3) The work machine according to claim 3, wherein the work machine main body includes a communication port that communicates the second section flow path with an outside. ### Claim 5 (depends on 4) The work machine according to claim 4, wherein the main flow path extends in right-left directions of the work machine main body, and the first wall surface and the second wall surface face each other in forward-rearward directions of the work machine main body. ### Claim 6 (depends on 3) The work machine according to claim 3, wherein the main flow path extends in right-left directions of the work machine main body, and the first wall surface and the second wall surface face each other in forward-rearward directions of the work machine main body. ### Claim 7 (depends on 2) The work machine according to claim 2, wherein the work machine main body includes a communication port that communicates the second section flow path with an outside. ### Claim 8 (depends on 7) The work machine according to claim 7, wherein the main flow path extends in right-left directions of the work machine main body, and the first wall surface and the second wall surface face each other in forward-rearward directions of the work machine main body. ### Claim 9 (depends on 2) The work machine according to claim 2, wherein the main flow path extends in right-left directions of the work machine main body, and the first wall surface and the second wall surface face each other in forward-rearward directions of the work machine main body. ### Claim 10 (depends on 1) The work machine according to claim 1, wherein a flow path cross-sectional area of the first section flow path decreases from the inlet toward the outlet, and the flow passage cross-sectional area of the second section flow path increases from the inlet toward the outlet. ### Claim 11 (depends on 10) The work machine according to claim 10, wherein the work machine main body includes a communication port that communicates the second section flow path with an outside. ### Claim 12 (depends on 11) The work machine according to claim 11, wherein the main flow path extends in right-left directions of the work machine main body, and the first wall surface and the second wall surface face each other in forward-rearward directions of the work machine main body. ### Claim 13 (depends on 10) The work machine according to claim 10, wherein the main flow path extends in right-left directions of the work machine main body, and the first wall surface and the second wall surface face each other in forward-rearward directions of the work machine main body. ### Claim 14 (depends on 1) The work machine according to claim 1, wherein the work machine main body includes a communication port that communicates the second section flow path with an outside. ### Claim 15 (depends on 14) The work machine according to claim 14, wherein the main flow path extends in right-left directions of the work machine main body, and the first wall surface and the second wall surface face each other in forward-rearward directions of the work machine main body. ### Claim 16 (depends on 1) The work machine according to claim 1, wherein the main flow path extends in right-left directions of the work machine main body, and the first wall surface and the second wall surface face each other in forward-rearward directions of the work machine main body.