Working machine

• US 8,381,856 B2
• Filed: 05/19/2010
• Issued: 02/26/2013
• Est. Priority Date: 05/25/2009
• Status: Active Grant

• Current Assignee: Kobelco Construction Machinery Company Limited (Kobe Steel Limited)
• Original Assignee: Kobelco Construction Machinery Company Limited (Kobe Steel Limited)
• Inventors: Shimomura, Keisuke, Okunishi, Takayuki, Yonezawa, Kouji
• Primary Examiner(s): Walters, John
• Assistant Examiner(s): SWENSON, BRIAN L
• Application Number:
  US12/782,970
• Publication Number:
  US 20100294578A1
• Time in Patent Office: 1,014 Days
• Field of Search: 180/291, 180/65.31, 180/68.1, 180/68.5, 180/900, 180/903, 180/908
• US Class Current: 180/68.5
• CPC Class Codes: B60K 1/00 Arrangement or mounting of electrical propulsion units B60K7/00 takes precedence; arrangement or mounting of plural diverse prime-movers for mutual or common propulsion B60K6/00; electric transmission arrangements B60K17/12; electric equipment or propulsion of electrically-propelled vehicles per se B60L; current-collectors for power supply lines of electrically-propelled vehicles B60L5/00
• CPC Class Codes: B60K 1/04 of the electric storage means for propulsion exchanging batteries for electric propulsion of vehicles B60L53/80; for auxiliary purposes only B60R16/04; supplying batteries to, or removing batteries from, vehicles B60S5/06
• CPC Class Codes: B60K 2001/005 the electric storage means
• CPC Class Codes: B60Y 2200/41 Construction vehicles, e.g. graders, excavators
• CPC Class Codes: 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
• CPC Class Codes: E02F 9/0833 Improving access, e.g. for maintenance, steps for improving driver's access, handrails
• CPC Class Codes: E02F 9/0858 Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units E02F9/16, E02F9/18 take precedence
• CPC Class Codes: E02F 9/2075 of the hybrid type for vehicles in general B60W20/00
• CPC Class Codes: E02F 9/2217 with energy recovery arrangements, e.g. using accumulators, flywheels
• CPC Class Codes: E02F 9/24 Safety devices , e.g. for preventing overload E02F9/226 takes precedence

Abstract

A plurality of supports and a top plate attached to between upper ends of the supports are provided, and a power storage device and a controller are installed on the both upper and lower sides of the top plate respectively. Meanwhile, a hydraulic pump and a control valve are accommodated in space for hydraulic devices on the lower side of the top plate, and a heat insulating member and heat shield plates are provided as heat shield means for protecting the power storage device and the controller against heat from the exterior including heat of the hydraulic pump and the control valve.

Claims

1. A working machine, comprising:

a lower traveling body;

an upper rotating body rotatably mounted on said lower traveling body, said upper rotating body having an upper frame;

a hydraulic device provided on the upper frame;

an electric device to be cooled down; and

a stand attached to the upper frame of said upper rotating body, said stand including

a plurality of supports each extending in a vertical direction,

a top plate attached to respective upper ends of said plurality of supports, said electric device being installed on said top plate, said plurality of supports and said top plate defining a space and the hydraulic device being accommodated in the space under said top plate, and

heat shield means for protecting the electric device installed on said top plate against heat from said hydraulic device accommodated in the space.

2. The working machine according to claim 1, wherein

the working machine is a hybrid working machine for which engine power and electric power are used in combination, and

a power storage device serving as a power source for a generator motor in the hybrid working machine is installed on said top plate.

3. The working machine according to claim 1, wherein said heat shield means includes a heat insulating member between a lower surface of said top plate and said hydraulic device accommodated in the space.

4. The working machine according to claim 1, wherein said heat shield means includes heat shield plates attached on said supports so as to enclose the space for blocking heat of the hydraulic device accommodated in the space from the electric device installed on said top plate.

5. The working machine according to claim 1, wherein said top plate includes a ventilation port therethrough for distributing cooling air from the upper side to the lower side of said top plate.

6. The working machine according to claim 1, wherein each support of the plurality of supports is adjoined to another support via a beam member.

7. The working machine according to claim 4, wherein the heat shield plates extend between adjacent supports.