Construction machine

• US 9,605,408 B2
• Filed: 05/14/2012
• Issued: 03/28/2017
• Est. Priority Date: 05/16/2011
• Status: Active Grant

• Current Assignee: Hitachi Construction Machinery Company Limited (Hitachi, Ltd.)
• Original Assignee: Hitachi Construction Machinery Company Limited (Hitachi, Ltd.)
• Inventors: Egawa, Shuji, Satake, Hidetoshi, Kato, Shinji, Hiroki, Takenori, Watanabe, Toshihiko, Ota, Yasunori, Ojima, Mitsugu
• Primary Examiner(s): Tan, Richard
• Application Number:
  US14/110,255
• Publication Number:
  US 20140021781A1
• Time in Patent Office: 1,779 Days
• Field of Search: 307/91, 307/9.1
• US Class Current: 1/1
• CPC Class Codes: E02F 3/3654 with energy coupler, e.g. coupler for hydraulic or electric lines, to provide energy to drive(s) mounted on the tool
• 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 9/0866 Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment
• CPC Class Codes: H01R 13/6392 for extension cord
• CPC Class Codes: H01R 33/975 Holders with resilient means for protecting apparatus against vibrations or shocks

Abstract

An electric motor that is fixed to a revolving frame, an electrical equipment that is supported by the revolving frame by using a vibration absorption mount, and a cable for establishing a connection between the electric motor and the electrical equipment are provided. A connector mounting member having an outer shape smaller than that of a box is provided in the box of the electrical equipment, and an equipment-side connector is provided in the connector mounting member. A cable-side connector of the cable is connected to the equipment-side connector, and a cable end portion of the cable is fixed to the box by a clamp member. As a result, the vibration that is transmitted to the cable can be matched with the vibration that is transmitted to the cable-side connector.

Claims

1. A construction machine comprising:

an automotive vehicle body;

an electric device that is mounted on said vehicle body;

first electrical equipment that includes at least a first electrical component which is connected to said electric device, and which is supported in a first box on said vehicle body by using a vibration absorption member;

second electrical equipment, that includes at least a second electrical component which is connected to said first electrical component, and which is supported in a second box on said vehicle body;

a first cable that establishes a first connection between said electric device and said first electrical equipment, and a second cable that establishes a second connection between said first electrical equipment and said second electrical equipment, characterized in that;

a first connector mounting member is provided on said first box of said first electrical equipment to be positioned on an outer surface side thereof and to project in an outer space smaller than said first box,

a second connector mounting member is provided on said second box of said second electrical equipment to be positioned on an outer surface side thereof and to project in an outer space smaller than said second box,

a first equipment-side connector to which a first cable-side connector that is provided on a first end portion of said first cable, at a side of said first electrical equipment, is connected, is provided in said first connector mounting member,

a second equipment-side connector, to which a second cable-side connector, that is provided on a first end portion of said second cable, at the side of said first electrical equipment, is connected, is provided in said first connector mounting member,

a third equipment-side connector, to which a third cable-side connector, which is provided on a second end portion of said second cable, at a side of said second electrical equipment, is connected, is provided in said second connector mounting member,

a first clamp member is provided on an outer surface of said first box in said first electrical equipment to be positioned near said first connector mounting member for fixing the first end portion of said first cable at the side of said first electrical equipment,

a second clamp member is provided on the outer surface of said first box in said first electrical equipment to be positioned near said first connector mounting member for fixing the first end portion of said second cable at the side of said first electrical equipment, and

a third clamp member is provided on the output surface of said second box in said second electrical equipment to be positioned near said second connector mounting member for fixing the second end portion of said second cable at the side of said second electrical equipment.

2. The construction machine according to claim 1, wherein

each said first and second box of said respective first and second electrical equipment is formed of a three-dimensional structure that is surrounded by a top surface, a bottom surface, and side surfaces,

each said first and second box of said respective first and second electrical equipment is provided on said vehicle body in a state of directing the bottom surface downward,

each said first and second connector mounting member is mounted to any of outer surfaces other than said bottom surface of each said respective first and second box,

each said cable-side connector of said respective first and second cable is arranged in a remaining portion of each said respective first and second box, other than a portion on which said respective first and second connector mounting member is mounted, among any of said outer surfaces of each said respective first and second box on which said connector mounting member is mounted, and

each said clamp member is mounted in said remaining portion of each said respective first and second box among any of said outer surfaces on which said respective first and second connector mounting member is mounted.

3. The construction machine according to claim 1, wherein

each said first and second box of said respective first and second electrical equipment is formed of a three-dimensional structure that is surrounded by a top surface, a bottom surface, a front surface, a rear surface, a left surface, and a right surface,

each said first and second connector mounting member is formed of a three-dimensional structure that is surrounded by a top surface, a front surface, a rear surface, a left surface, and a right surface,

each said first and second box of said respective first and second electrical equipment is provided on said vehicle body in a state of directing the bottom surface downward,

each said first and second connector mounting member is provided on any of said outer surfaces other than said bottom surface of each said first and second box,

each said first, second and third equipment-side connector is provided on a surface perpendicular to any of said outer surface on which said respective first and second connector mounting member is provided to said respective first and second box among the respective surfaces of said respective first and second connector mounting member,

each said respective first and second connector mounting member is arranged to be closer to said rear surface side of said respective first and second box in such a manner that a space is formed in a front side of said surface on which said respective first, second and third equipment-side connector is provided to said respective first and second connector mounting member,

said respective first, second and third cable-side connector of said respective first and second cable is arranged on any of said outer surface of said respective first and second box to be positioned on a front side of said surface on which said respective first, second and third equipment-side connector is provided to said respective first and second connector mounting member, and

said respective first, second and third clamp member is arranged on any of said outer surface of said respective first and second box to be positioned on the front side of said surface on which said respective first, second and third equipment-side connector is provided to said respective first and second connector mounting member.

4. The construction machine according to claim 2, wherein first and second clamp fixing portions are provided on said first box, and said first and second clamp members are mounted to said first and second clamp fixing portions, respectively.

5. The construction machine according to claim 1, wherein

each said first and second box is provided with a cover for covering said respective first, second and third equipment-side connector that is provided in said respective first and second connector mounting member and said respective first, second and third cable-side connector that is connected to said respective first, second and third equipment-side connector.

6. The construction machine according to claim 1, wherein

said first electrical equipment is connected to said electric device by using said first cable, and said second electrical equipment is connected to said first electrical equipment by using said second cable, and wherein

an inverter circuit is accommodated in said first box of said first electrical equipment, and a condenser for reserving electrical energy is accommodated in said second box of said second electrical equipment.

7. The construction machine according to claim 1, wherein

said vehicle body is provided with a frame for forming a support structure, a cab for defining an operator'"'"'s room that is provided in a front portion side of said frame,

a machine room that is provided in a rear portion side of said frame to accommodate a prime mover required for driving said vehicle body and to be covered with a housing cover, and an accommodation space, that is provided in said housing cover together with said machine room, is closed by a floor plate and can accommodate one of equipment and components, and

said floor plate of said accommodation space is removable from said frame,

said floor plate and said first electrical equipment are assembled in advance through said vibration absorption member to form a single onboard equipment assembly, and

said floor plate forming said single onboard equipment assembly is mounted to said frame in a position of said accommodation space.

8. The construction machine according to claim 7, wherein

said accommodation space is formed as a utility room that is provided in a rear portion of said cab, is covered with a door cover which can open and close at a side portion, and is closed by said floor plate.

9. The construction machine according to claim 7, wherein said vibration absorption member is composed of an equipment-side mounting portion that is mounted to said first electrical equipment, a floor plate-side mounting portion that is mounted to said floor plate, an elastic body that is provided between said equipment-side mounting portion and said floor plate-side mounting portion, and a bolt that is provided in said floor plate-side mounting portion to be inserted into said floor plate, and said single onboard equipment assembly is formed by mounting said equipment-side mounting portion of said vibration absorption member to a bottom surface of said first electrical equipment, and fastening said bolt of said vibration absorption member to said floor plate, and said floor plate of said single onboard equipment assembly is mounted to said frame by using a fastening member in a state of being placed on said frame.

10. The construction machine according to claim 9, wherein said floor plate-side mounting portion of said vibration absorption member is provided with a rotation restricting member for suppressing said vibration absorption member to rotate to said floor plate by an engagement to said floor plate.

11. The construction machine according to claim 7, wherein

a rope hanging tool is mounted to said floor plate of said single onboard equipment assembly to hang a rope for lifting said single onboard equipment assembly.