Generator motor and work machine

Patent metadata

Field	Value
Publication number	US-9160208-B2
Application number	US-201213816383-A
Country	US
Kind code	B2
Filing date	Mar 26, 2012
Priority date	Mar 31, 2011
Publication date	Oct 13, 2015
Grant date	Oct 13, 2015

Abstract

A generator motor connected to an output shaft of an engine mounted in a work machine includes a terminal box for connecting an exterior electric-power-supplying cable to the generator motor. The terminal box includes a casing having an inner space in communication with an inside of a housing of the generator motor. A casing of the terminal box is detachably provided to the housing 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 terminal box for connecting an exterior electric-power-supplying cable to the generator motor, the terminal box having a casing that defines
an inner space in communication with an inside of a housing of the generator motor;
wherein a cable-insertion hole enables communication between the inside of the generator motor and the inner space,
wherein a communication hole that is separate from the cable-insertion hole is provided at a position vertically below the cable-insertion hole, the communication hole enabling additional communication between the inside of the generator motor and the inner space, and
wherein the casing of the terminal box is detachably provided to the housing of the generator motor at a position that is vertically above a rotation shaft of the generator motor.

2. The generator motor according to claim 1 , wherein
the casing of the terminal box is made of a material having a lighter weight than that of a material for the housing of the generator motor.

3. The generator motor according to claim 1 , wherein
the casing of the terminal box is made of an anti-corrosive material or a surface of the casing is treated with a corrosion protection processing.

4. The generator motor according to claim 1 , wherein
the casing of the terminal box is made of aluminium.

5. The generator motor according to claim 1 , wherein
the casing of the terminal box comprises:
a case detachably provided to the housing of the generator motor; and
a cover member for closing an inner space of the case with a seal member interposed between the cover member and the case, wherein
the casing is made of aluminium, and
the cover member is made of a steel material having a galvanized surface.

6. The generator motor according to claim 1 , wherein
an inside of the generator motor is cooled by a cooling medium.

7. The generator motor according to claim 1 , wherein
the terminal box is attached to the generator motor at a position lower than a top surface of the generator motor.

8. The generator motor according to claim 1 , further comprising:
a closing member that closes the cable-insertion hole except for the cable.

9. The generator motor according to claim 1 , wherein
the terminal box houses a connector for connecting the exterior electric-power-supplying cable to the generator motor; and
when the terminal box is connected to the housing of the generator motor, the connector is disposed facing downward and the electric-power-supplying cable is connectable to the connector from underneath the connector.

10. The generator motor according to claim 1 , wherein
the terminal box houses a plurality of connectors for connecting the exterior electric-power-supplying cable to the generator motor; and
when the terminal box is connected to the housing of the generator motor, the plurality of connectors are juxtaposed in a direction of the rotation shaft of the generator motor.

11. A work machine comprising:
a working equipment;
a hydraulic pump that drives the working equipment; and
the generator motor according to claim 1 , wherein
the hydraulic pump is provided to the generator motor.

12. The generator motor according to claim 6 , wherein the cooling medium comprises a cooling oil.

13. A generator motor connected to an output shaft of an engine mounted in a work machine, the generator motor comprising:
a terminal box for connecting an exterior electric-power-supplying cable to the generator motor, the terminal box having a casing that defines an inner space in communication with an inside of a housing of the generator motor; and
a fixing portion for attaching the terminal box to the generator motor,
wherein the fixing portion defines a cable-insertion hole that enables communication between the inside of the generator motor and the inner space, and defines a separate communication hole provided at a position vertically below the cable-insertion hole that enables additional communication between the inside of the generator motor and the inner space, and
wherein the casing of the terminal box is detachably provided to the housing of the generator motor at a position that is vertically above a rotation shaft of the generator motor.

14. The generator motor according to claim 13 , wherein
the casing of the terminal box is made of a material having a lighter weight than that of a material for the housing of the generator motor.

15. The generator motor according to claim 13 , wherein
the casing of the terminal box comprises:
a case detachably provided to the housing of the generator motor; and
a cover member for closing an inner space of the case with a seal member interposed between the cover member and the case, wherein
the casing is made of aluminium, and
the cover member is made of a steel material having a galvanized surface.

16. The generator motor according to claim 13 , wherein an inside of the generator motor is cooled by a cooling medium.

17. The generator motor according to claim 16 , wherein the cooling medium comprises a cooling oil.

18. The generator motor according to claim 13 , wherein
the terminal box is attached to the generator motor at a position lower than a top surface of the generator motor.

19. The generator motor according to claim 13 , wherein
the terminal box houses a connector for connecting the exterior electric-power-supplying cable to the generator motor; and
when the terminal box is connected to the housing of the generator motor, the connector is disposed facing downward and the electric-power-supplying cable is connectable to the connector from underneath the connector.

20. The generator motor according to claim 13 , wherein
the terminal box houses a plurality of connectors for connecting the exterior electric-power-supplying cable to the generator motor; and
when the terminal box is connected to the housing of the generator motor, the plurality of connectors are juxtaposed in a direction of the rotation shaft of the generator motor.

Assignees

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

Inventors

• Murata Hiroaki
• Watanabe Kouichi
• Nagano Takao

Classifications

• B60L50/13

  using AC generators and AC motors · CPC title

• B60L2200/40

  Working vehicles · CPC title

• B60L50/40

  using propulsion power supplied by capacitors · CPC title

• H02K5/225 Primary

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

• E02F9/0866

  Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment · CPC title