Generator motor and work machine

Patent metadata

Field	Value
Publication number	US-9362797-B2
Application number	US-201213816115-A
Country	US
Kind code	B2
Filing date	Mar 26, 2012
Priority date	Mar 31, 2011
Publication date	Jun 7, 2016
Grant date	Jun 7, 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 connector for connecting an exterior electric-power-supplying cable to the generator motor. While the terminal box is provided to the generator motor, the connector is provided facing downward and the electric-power-supplying cable is connectable to the connector from underneath the connector.

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 rotation shaft that extends horizontally; and
a terminal box that is attached to the housing and that houses an entirety of a socket contact that is electrically coupled to a stator coil of the generator motor, wherein the socket contact is oriented facing vertically downward and configured to detachably connect to a pin contact provided on an exterior electric-power-supplying cable that extends vertically upward toward a top surface of the generator motor, the pin contact being configured to be plugged in and unplugged from the socket contact in a vertical direction from vertically underneath the socket contact.

2. 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 connected to the generator motor at a position that is vertically higher than a rotation shaft of the generator motor.

3. The generator motor according to claim 2 , wherein
the terminal box is connected to the generator motor at a position that is vertically lower than the top surface of the generator motor.

4. The generator motor according to claim 1 , further comprising:
a cable-insertion hole that enables communication between the inside of the generator motor and an inside of the terminal box; and
a closing member that closes the cable-insertion hole except for the cable.

5. The generator motor according to claim 4 , further comprising:
a communication hole separate from the cable-insertion hole that enables communication between the inside of the generator motor and the inside of the terminal box.

6. The generator motor according to claim 5 , wherein
a bottom portion of the terminal box is positioned at a lower side of the terminal box, and
an inner surface of the bottom portion is inclined downward toward the communication hole.

7. 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.

8. The generator motor according to claim 1 , wherein the socket contact is oriented facing vertically downward toward a bottom surface of the generator motor.

9. The generator motor according to claim 2 , wherein the exterior electric-power-supplying cable extends from a height that is vertically below the output shaft to a height that is vertically above the output shaft.

10. The generator motor according to claim 2 , wherein the cooling medium comprises a cooling oil.

11. The generator motor according to claim 1 , wherein the pin contact is connectable to the socket contact along a plane that is orthogonal to a rotation shaft of the generator motor.

12. The generator motor according to claim 1 , wherein the exterior electric-power-supplying cable is insertable into the terminal box through a vertically lowermost surface of the terminal box.

13. The generator motor according to claim 1 , wherein the terminal box is a detachable component of the generator motor.

14. 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 stator coil;
a rotation shaft; and
a terminal box that is attached to the housing and that houses an entirety of a socket contact that is electrically coupled to the stator coil,
wherein the generator motor has a top surface above the rotation shaft of the generator motor and a bottom surface below the rotation shaft, and
wherein the socket contact is oriented away from the top surface and toward the bottom surface, and a top end of an exterior electric-power-supplying cable that extends toward the top surface of the generator motor is detachably connectable upward to the socket contact from vertically underneath the socket contact along a plane that is orthogonal to the rotation shaft.

15. The generator motor according to claim 14 , wherein the exterior electric-power-supplying cable is insertable into the terminal box through a bottommost surface of the terminal box.

16. The generator motor according to claim 14 , wherein the terminal box is a detachable component of the generator motor.

17. 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 stator coil;
a rotation shaft;
a socket having a socket contact that is electrically coupled to the stator coil;
a terminal box that is attached to the housing and that houses an entirety of the socket contact; and
an exterior electric-power-supplying cable having a pin contact that is configured to detachably connect to the socket contact, the exterior electric-power-supplying cable being configured to connect the generator motor to an inverter,
wherein the socket and exterior electric-power-supplying cable are axially aligned at an intersection point thereof, and
wherein the axial alignment between the socket and exterior electric-power-supplying cable is orthogonal to the rotation shaft and oriented vertically upward toward a top surface of the generator motor.

18. The generator motor according to claim 17 , wherein the exterior electric-power-supplying cable is insertable into the terminal box through a vertically lowermost surface of the terminal box.

19. The generator motor according to claim 17 , wherein the terminal box is a detachable component of the generator motor.

Assignees

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

Inventors

• Murata Hiroaki
• Watanabe Kouichi
• Nagano Takao

Classifications

• H02K9/00

  Arrangements for cooling or ventilating (channels or ducts in parts of the magnetic circuit H02K1/20, H02K1/32; channels or ducts in or between conductors H02K3/22, H02K3/24) · CPC title

• H02K5/225 Primary

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

• B60L2200/40

  Working vehicles · CPC title

• B60L2270/145

  Structure borne vibrations · CPC title

• 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