Generator motor and work machine

Patent metadata

Field	Value
Publication number	US-9337701-B2
Application number	US-201213816158-A
Country	US
Kind code	B2
Filing date	Mar 26, 2012
Priority date	Mar 31, 2011
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

A generator motor connected to an output shaft of an engine mounted in a work machine includes a terminal box that houses a plurality of connectors for connecting an exterior electric-power-supplying cable to the generator motor. While the terminal box is provided to the generator motor, the plurality of connectors are juxtaposed in a direction intersecting an orthogonal plane that is orthogonal to a rotation shaft of the generator motor.

First claim

The invention claimed is:

1. A generator motor connected to an output shaft of an engine mounted in a work machine, the generator motor comprising:
a housing configured to be fixed to the engine of the work machine;
a terminal box that houses a first socket configured to releasably connect a first exterior electric-power-supplying cable to the generator motor and a second socket configured to releasably connect a second exterior electric-power-supplying cable to the generator motor, wherein:
the first socket has a plurality of first socket contacts that are electrically coupled to a stator coil of the generator motor and configured to be detachably connected to a corresponding plurality of contacts provided on the first exterior electric-power-supplying cable,
the second socket has a plurality of second socket contacts that also are electrically coupled to the stator coil and configured to be detachably connected to a corresponding plurality of contacts provided on the second exterior electric-power-supplying cable, and

when the terminal box is connected to the housing of the generator motor, the plurality of first socket contacts are arranged along a first line that is orthogonal to a longitudinal direction of a rotation shaft of the generator motor, and the plurality of second socket contacts are arranged along a second line that is parallel to the first line, the plurality of second socket contacts being spaced apart from the plurality of first socket contacts along the longitudinal direction of the rotation shaft.

2. The generator motor according to claim 1 , wherein
when the terminal box is connected to the generator motor, the first socket and the second socket are disposed facing downward.

3. The generator motor according to claim 1 , wherein
the first socket is fixed to a side surface of the terminal box, and the second socket is disposed opposite to the side surface with the first socket interposed therebetween and is fixed to the side surface through a support member, and
the support member comprises a contact end that is provided in a plane orthogonal to the direction along which the first socket and the second socket are juxtaposed and is brought into contact with an inner surface of the terminal box.

4. The generator motor according to claim 3 , wherein
the second socket comprises a contact terminal that is provided near the second exterior electric-power-supplying cable and detects a connecting condition to the second exterior electric-power-supplying cable, and
the contact end of the support member is brought into contact with the inner surface of the terminal box in a direction in which the second exterior electric-power-supplying cable is attached and detached.

5. The generator motor according to claim 1 , wherein
an inside of the generator motor is cooled by a cooling medium, and
the terminal box is attached to the generator motor at a position higher than the rotation shaft of the generator motor.

6. The generator motor according to claim 5 , wherein
the terminal box is attached to the generator motor at a position lower than a top surface of the generator motor.

7. The generator motor according to claim 1 , further comprising:
a hydraulic pump that drives working equipment of the work machine.

8. A work machine comprising:
a working equipment;
a counterweight that is filled with weights for weight balance against the working equipment; and
the generator motor according to claim 1 , wherein
the generator motor is provided near the counterweight, and
the terminal box is provided to a side surface of the generator motor facing the counterweight.

9. The generator motor according to claim 5 , wherein the cooling medium comprises a cooling oil.

10. A generator motor connected to an output shaft of an engine mounted in a work machine, the generator motor comprising:
a housing configured to be fixed to the engine of the work machine;
a terminal box that houses a first connecting means configured to releasably connect a first exterior electric-power-supplying cable to the generator motor and a second connecting means configured to releasably connect a second exterior electric-power-supplying cable to the generator motor, wherein:
the first connecting means has a plurality of first contacts that are electrically coupled to a stator coil of the generator motor and configured to be detachably connected to a corresponding plurality of contacts provided on the first exterior electric-power-supplying cable,
the second connecting means has a plurality of second contacts that also are electrically coupled to the stator coil and configured to be detachably connected to a corresponding plurality of contacts provided on the second exterior electric-power-supplying cable, and
when the terminal box is connected to the housing of the generator motor, the plurality of first contacts are arranged along a first line that is orthogonal to a longitudinal direction of a rotation shaft of the generator motor, and the plurality of second contacts are arranged along a second line that is parallel to the first line, the plurality of second contacts being spaced apart from the plurality of first contacts along the longitudinal direction of the rotation shaft.

11. The generator motor according to claim 10 , wherein the first connecting means comprises a first socket that is configured to receive the first exterior electric-power-supplying cable.

12. The generator motor according to claim 11 , wherein the second connecting means comprises a second socket that is configured to receive the second exterior electric-power-supplying cable.

13. The generator motor according to claim 12 , wherein when the terminal box is connected to the generator motor, the first socket and the second socket are disposed facing downward.

14. The generator motor according to claim 12 , wherein
the first socket is fixed to a side surface of the terminal box, and the second socket is disposed opposite to the side surface with the first socket interposed therebetween and is fixed to the side surface through a support member, and
the support member comprises a contact end that is provided in a plane orthogonal to the direction along which the first socket and the second socket are juxtaposed and is brought into contact with an inner surface of the terminal box.

15. The generator motor according to claim 14 , wherein
the second socket comprises a contact terminal that is provided near the second exterior electric-power-supplying cable and detects a connecting condition to the second exterior electric-power-supplying cable, and
the contact end of the support member is brought into contact with the inner surface of the terminal box in a direction in which the second exterior electric-power-supplying cable is attached and detached.

16. The generator motor according to claim 10 , wherein
an inside of the generator motor is cooled by a cooling medium, and
the terminal box is attached to the generator motor at a position higher than the rotation shaft of the generator motor.

17. The generator motor according to claim 16 , wherein
the terminal box is attached to the generator motor at a position lower than a top surface of the generator motor.

18. The generator motor according to claim 10 , further comprising:
a hydraulic pump that drives working equipment of the work machine.

19. A work machine comprising:
a working equipment;
a counterweight that is filled with weights for weight balance against the working equipment; and
the gener

Assignees

• Murata Hiroaki
• Watanabe Kouichi
• Nagano Takao
• Komatsu Mfg Co Ltd

Inventors

• Murata Hiroaki
• Watanabe Kouichi
• Nagano Takao

Classifications

• H02K7/14

  Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) · CPC title

• H02K5/225 Primary

  Terminal boxes or connection arrangements (specially adapted for submersible motors H02K5/132) · CPC title

• E02F9/0858

  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 title

• E02F9/2075

  of the hybrid type (for vehicles in general B60W20/00) · CPC title

• E02F9/00

  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 title