Rear entry electric drive motor module

Patent metadata

Field	Value
Publication number	US-10294634-B2
Application number	US-201414503439-A
Country	US
Kind code	B2
Filing date	Oct 1, 2014
Priority date	Oct 1, 2014
Publication date	May 21, 2019
Grant date	May 21, 2019

Abstract

A method for retrofitting a high drive track-type tractor with a rear entry electric drive motor module. The method includes inserting the rear entry electric drive motor module into a frame housing. The rear entry electric drive motor module includes an electric drive planetary gear assembly, and an electric motor. The method further includes attaching a reaction member to the rear entry electric drive motor module.

First claim

What is claimed is:

1. An electric drive system, comprising:
a rear entry electric drive motor module, the rear entry electric drive motor module being a single displaceable unit defined by a housing assembly and that includes:
an electric drive planetary gear assembly, and
an electric motor having a rotor shaft, the electric drive planetary gear assembly being integrated with the electric motor;

a first output member;
a second output member; and
a reaction member operatively associated with the rotor shaft,
wherein the housing assembly of the rear entry electric drive motor module is different and separable from a frame housing associated with the electric drive system.

2. The electric drive system of claim 1 , wherein the rear entry electric drive motor module is operatively associated with a first planetary gear assembly, a second planetary gear assembly, and a third planetary gear assembly.

3. The electric drive system of claim 2 , wherein the reaction member drives the third planetary gear assembly.

4. The electric drive system of claim 1 , wherein the electric motor is an alternating current electric motor.

5. The electric drive system of claim 1 , wherein the electric motor is a direct current electric motor.

6. The electric drive system of claim 1 , wherein the rotor shaft splines into the electric drive planetary gear assembly.

7. The electric drive system of claim 6 , wherein the rotor shaft of the electric motor is hollow and the reaction member extends through the hollow rotor shaft.

8. A differential steering arrangement for a tractor, comprising:
a frame housing having a rear opening leading to a cavity;
a rear entry electric drive motor module, the rear entry electric drive motor module being a single displaceable unit defined by a housing assembly, different from the frame housing, and that includes:
an electric drive planetary gear assembly,
an electric motor having a hollow rotor shaft, the electric drive planetary gear assembly being integrated with the electric motor;

a first output member;
a second output member; and
a reaction member operatively associated with the hollow rotor shaft,
wherein the housing assembly of the rear entry electric drive motor module is separable from the frame housing via the rear opening, and
wherein the housing assembly of the rear entry electric drive motor module is arranged at least partially in the rear opening of the frame housing.

9. The differential steering arrangement of claim 8 , wherein the reaction member drive a third planetary gear assembly.

10. The differential steering arrangement of claim 8 , wherein the electric motor is an alternating current electric motor.

11. The differential steering arrangement of claim 8 , wherein the electric motor is a direct current electric motor.

12. The differential steering arrangement of claim 8 , wherein the rotor shaft splines into the electric drive gear assembly.

13. The differential steering arrangement of claim 12 , wherein the reaction member extends through the hollow rotor shaft.

14. A vehicle, comprising:
a frame housing having rear cavity access through a rear entry in a rear-facing side of the frame housing;
a first ground engaging device;
a second ground engaging device;
a first output member connected to the first ground engaging device;
a second output member connected to the second ground engaging device; and
an electric drive system, comprising:
an electric drive motor module, the electric drive motor module being a single displaceable unit defined by a housing assembly and configured for installation in the vehicle through the rear entry of the frame housing, and the electric drive motor module including:
an electric drive planetary gear assembly, and
an electric motor having a rotor shaft, the electric drive planetary gear assembly being integrated with the electric motor, and
a reaction member operatively associated with the rotor shaft,

wherein the electric drive motor module is operatively associated with a first planetary gear assembly, a second planetary gear assembly, and a third planetary gear assembly, and
wherein the housing assembly defining the electric drive motor module is removable from the frame housing without removing any of the first, second, or third planetary gear assemblies.

15. The electric drive system of claim 14 , wherein the reaction member drives the third planetary gear assembly.

16. The electric drive system of claim 14 , wherein the electric motor is an alternating current electric motor.

17. The electric drive system of claim 14 , wherein the electric motor is a direct current electric motor.

18. The electric drive system of claim 14 , wherein the rotor shaft splines into the electric drive planetary gear assembly.

19. The electric drive system of claim 18 , wherein the rotor shaft of the electric motor is hollow and the reaction member extends through the hollow rotor shaft.

Assignees

• Caterpillar Inc

Inventors

• Tigue Joseph D
• Buatte Vance M
• Baumann Jonathan M
• Austin Gregory
• Schlack Timothy J

Classifications

• E02F9/2087 Primary

  Control of vehicle steering (for steering with hydraulic or pneumatic drives E02F9/225) · CPC title

• B62D55/32

  Assembly, disassembly, repair or servicing of endless-track systems · CPC title

• E02F9/207

  of the type electric propulsion units, e.g. electric motors or generators · CPC title

• H02K7/116

  with gears · CPC title

• E02F9/202

  Mechanical transmission, e.g. clutches, gears (clutches per se F16D, gears per se F16H) · CPC title