# US 8,540,042 B2 · Cooling structure for construction machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,540,042 B2 - Document ID: US8540042B2 - Status: Granted - Kind: B2 - Application number: 13/522,719 - Filed: 2011-01-07 - Published: 2012-11-15 - Granted: 2013-09-24 - Earliest claimed: 2010-01-19 - Assignees: Hitachi Construction Machinery Co., Ltd. - Applicants: Takayuki Atarashi; Shuichi Terakado; Shigehisa Funabashi; Shinya Okumura; Shigekazu Kieda; Yasunori Ota - Inventors: Takayuki Atarashi; Shuichi Terakado; Shigehisa Funabashi; Shinya Okumura; Shigekazu Kieda; Yasunori Ota - Web page: https://patentgrep.com/patent/US8540042B2 ## CPC - E02F 9/08: Superstructures; Supports for superstructures {(arrangements for travelling gear, e.g. undercarriages for wheels, crawlers, caterpillars E02F9/02; for motor vehicles B62D25/00, B62D33/00)} - B60K 1/04: of the electric storage means for propulsion - B60K 11/04: Arrangement or mounting of radiators, radiator shutters, or radiator blinds - B60L 58/26: by cooling - E02F 9/18: Counterweights {(for cranes B66C23/72, for tractors B62D49/085)} - B60K 6/20: the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs - B60K 2001/005: {the electric storage means} - B60K 2001/0416: {Arrangement in the rear part of the vehicle} - B60Y 2200/412: Excavators - B60Y 2400/61: Arrangements of controllers for electric machines, e.g. inverters - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00) - 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 - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract The construction machine including an engine room having an engine, a radiator ii for cooling the engine, and a hydraulic pump which are arranged therein, and a counterweight area which is located adjacent to the engine room and in which batteries are installed, a ventilation passage for cooling the engine room and a ventilation passage for cooling the batteries are formed separately and independently in the substantially same direction, and a flowing direction of cooling air flowing in the ventilation passage for cooling the engine room and a flowing direction of cooling air flowing in the ventilation passage for cooling the batteries are substantially parallel to each other. ## Claims ### Claim 1 A cooling structure for a construction machine, the construction machine comprising: an engine room including an engine, a radiator for cooling the engine, and a hydraulic pump; and a counterweight area including batteries, wherein: a ventilation passage for cooling the engine room and a ventilation passage for cooling the batteries are formed separately and independently; and an air exhaust port of the ventilation passage for cooling the engine room and an air intake port of the ventilation passage for cooling the batteries are formed in different surfaces to each other, and wherein: a ventilation duct that connects the air intake port and an air exhaust port for cooling air for cooling the batteries to form the ventilation passage for cooling the batteries is provided in the counterweight area; and the batteries are installed in the ventilation duct. ### Claim 2 (depends on 1) The cooling structure for a construction machine, according to claim 1, wherein the different surfaces are mutually opposite side surfaces of the construction machine. ### Claim 3 (depends on 1) The cooling structure for a construction machine, according to claim 1, wherein a blower that generates the cooling air for the batteries is installed at a downstream portion of the flowing direction of the cooling air flowing in the ventilation passage for cooling the batteries. ### Claim 4 (depends on 1) The cooling structure for a construction machine, according to claim 1, wherein a blower that generates the cooling air for the batteries is installed at a middle portion of the flowing direction of the cooling air flowing in the ventilation passage for cooling the batteries. ### Claim 5 A cooling structure for a construction machine, the construction machine comprising: an engine room including an engine, a radiator for cooling the engine, and a hydraulic pump; and a counterweight area including batteries, wherein: a ventilation passage for cooling the engine room and a ventilation passage for cooling the batteries are formed separately and independently; and an air exhaust port of the ventilation passage for cooling the engine room and an air intake port of the ventilation passage for cooling the batteries are formed in different surfaces to each other, and wherein a guide part that guides a flow of cooling air is installed in the ventilation passage for cooling the batteries. ### Claim 6 A cooling structure for a construction machine, the construction machine comprising: an engine room including an engine, a radiator for cooling the engine, and a hydraulic pump; and a counterweight area including batteries, wherein: a ventilation passage for cooling the engine room and a ventilation passage for cooling the batteries are formed separately and independently; and an air exhaust port of the ventilation passage for cooling the engine room and an air intake port of the ventilation passage for cooling the batteries are formed in different surfaces to each other, and wherein a thermal insulating member is installed in the ventilation passage for cooling the batteries. ### Claim 7 (depends on 1) The cooling structure for a construction machine, according to claim 1, wherein the batteries are installed at spaces for ventilating the cooling air along the flowing direction of the cooling air flowing in the ventilation passage for cooling the batteries. ### Claim 8 (depends on 1) The cooling structure for a construction machine, according to claim 1, wherein the batteries are installed at spaces for ventilating the cooling air along a direction perpendicular to the flowing direction of the cooling air flowing in the ventilation passage for cooling the batteries. ### Claim 9 A cooling structure for a construction machine, the construction machine comprising: an engine room including an engine, a radiator for cooling the engine, and a hydraulic pump; and a counterweight area including batteries, wherein: a ventilation passage for cooling the engine room and a ventilation passage for cooling the batteries are formed separately and independently; and an air exhaust sort of the ventilation passage for cooling the engine room and an air intake port of the ventilation passage for cooling the batteries are formed in different surfaces to each other, and wherein shelf plates are installed in the counterweight area in a multiple step manner, the batteries are fixed on the respective shelf plates, and spaces for ventilating cooling air are formed between the batteries and shelf plates above the batteries. ### Claim 10 (depends on 1) The cooling structure for a construction machine, according to claim 1, wherein the batteries are batteries selected from a group including lead batteries, lithium ion batteries, and nickel-hydrogen batteries. ### Claim 11 (depends on 5) The cooling structure for a construction machine, according to claim 5, wherein the different surfaces are mutually opposite side surfaces of the construction machine. ### Claim 12 (depends on 5) The cooling structure for a construction machine, according to claim 5, wherein a blower that generates the cooling air for the batteries is installed at a downstream portion of the flowing direction of the cooling air flowing in the ventilation passage for cooling the batteries. ### Claim 13 (depends on 5) The cooling structure for a construction machine, according to claim 5, wherein the batteries are batteries selected from a group including lead batteries, lithium ion batteries, and nickel-hydrogen batteries. ### Claim 14 (depends on 6) The cooling structure for a construction machine, according to claim 6, wherein the different surfaces are mutually opposite side surfaces of the construction machine. ### Claim 15 (depends on 6) The cooling structure for a construction machine, according to claim 6, wherein a blower that generates cooling air for the batteries is installed at a downstream portion of the flowing direction of the cooling air flowing in the ventilation passage for cooling the batteries. ### Claim 16 (depends on 6) The cooling structure for a construction machine, according to claim 6, wherein the batteries are batteries selected from a group including lead batteries, lithium ion batteries, and nickel-hydrogen batteries. ### Claim 17 (depends on 9) The cooling structure for a construction machine, according to claim 9, wherein the different surfaces are mutually opposite side surfaces of the construction machine. ### Claim 18 (depends on 9) The cooling structure for a construction machine, according to claim 9, wherein a blower that generates the cooling air for the batteries is installed at a downstream portion of the flowing direction of the cooling air flowing in the ventilation passage for cooling the batteries. ### Claim 19 (depends on 9) The cooling structure for a construction machine, according to claim 9, wherein the batteries are batteries selected from a group including lead batteries, lithium ion batteries, and nickel-hydrogen batteries.