Utility vehicle having a front electric motor

• US 8,936,120 B2
• Filed: 12/29/2011
• Issued: 01/20/2015
• Est. Priority Date: 12/29/2011
• Status: Active Grant

• Current Assignee: Kawasaki Motors Ltd (Kawasaki Heavy Industries Limited)
• Original Assignee: Kawasaki Jukogyo Kabushiki Kaisha (Kawasaki Heavy Industries Limited)
• Inventors: Takagi, Izumi
• Primary Examiner(s): FOLLMAN, BRODIE J
• Application Number:
  US13/340,477
• Publication Number:
  US 20130168174A1
• Time in Patent Office: 1,118 Days
• Field of Search: 180/65.22, 180/291, 180/292, 180/299, 180/65.1, 180/65.235, 180/65.24, 180/65.285, 180/65.31, 180/69.6, 903/906, 605/98, 475/5
• US Class Current: 180/65.22
• CPC Class Codes: B60K 2001/001 one motor mounted on a propulsion axle for rotating right and left wheels of this axle
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60K 6/52 Driving a plurality of drive axles, e.g. four-wheel drive
• CPC Class Codes: B60Y 2200/23 Ridable golf cars
• CPC Class Codes: Y02T 10/62 Hybrid vehicles

Abstract

A hybrid utility vehicle is provided. The hybrid utility vehicle may include right and left front wheels suspended from a vehicle body. The hybrid utility vehicle may further include a front differential gear device coupled to the right and left front wheels via a pair of front axles, respectively, the differential gear device including an input shaft extending in a direction substantially perpendicular to the front axles. The hybrid utility vehicle may further include a front electric motor positioned at a front portion of the vehicle body and coupled to the input shaft of the front differential gear device.

Claims

1. A utility vehicle comprising:

right and left front wheels suspended from a vehicle body;

a front differential gear device coupled to the right and left front wheels via a pair of front axles, respectively, and including an input shaft extending in a direction substantially perpendicular to the front axles; and

a front electric motor positioned at a front portion of the vehicle body and coupled to the input shaft of the front differential gear device;

right and left rear wheels suspended from the vehicle body;

a rear differential gear device provided mechanically independent of the front differential gear device, the rear differential gear device being coupled to the right and left rear wheels via a pair of rear axles, respectively; and

a rear electric motor coupled to the rear differential gear device;

wherein the front electric motor is positioned forward relative to the front differential gear device;

wherein the front differential gear device includes a reduction gear mechanism which is disposed between an output shaft of the front electric motor and the input shaft of the front differential gear device, reduces a speed of rotation of the output shaft of the front electric motor and transmits rotation of the output shaft of the front electric motor to the input shaft of the front differential gear device at the reduced speed of rotation;

the front electric motor is deviated in one direction of a vehicle width direction from a center line in the vehicle width direction; and

the rear electric motor is deviated in an opposite direction of the vehicle width direction from the center line in the vehicle width direction.

2. A utility vehicle comprising:

right and left front wheels suspended from a vehicle body;

a front differential gear device coupled to the right and left front wheels via a pair of front axles, respectively, and including an input shaft extending in a direction substantially perpendicular to the front axles; and

a front electric motor positioned at a front portion of the vehicle body and coupled to the input shaft of the front differential gear device;

wherein the front electric motor is positioned forward relative to the front differential gear device;

an output shaft of the front electric motor is disposed in parallel with the input shaft of the front differential gear device; and

the front electric motor deviated in one direction of a vehicle width direction from a center of the vehicle.

3. A utility vehicle comprising:

right and left front wheels suspended from a vehicle body;

a front differential gear device coupled to the right and left front wheels via a pair of front axles, respectively, and including an input shaft extending in a direction substantially perpendicular to the front axles; and

a front electric motor positioned at a front portion of the vehicle body and coupled to the input shaft of the front differential gear device;

wherein the front electric motor is positioned forward relative to the front differential gear device;

the front electric motor is deviated in one direction of a vehicle width direction from a center of the vehicle, the one direction being opposite to a direction in which a steering wheel is deviated from the center of the vehicle in the vehicle width direction.

4. The utility vehicle according to claim 3,

wherein the front electric motor is positioned above relative to the front differential gear device.

5. The utility vehicle according to claim 4,

wherein the front electric motor extends upward from the front differential gear device such that the front electric motor is tilted forward.

6. The utility vehicle according to claim 3, wherein an output shaft of the front electric motor is disposed in parallel with the input shaft of the front differential gear device.

7. A utility vehicle comprising:

right and left front wheels suspended from a vehicle body;

a front differential gear device coupled to the right and left front wheels via a pair of front axles, respectively, and including an input shaft extending in a direction substantially perpendicular to the front axles; and

a front electric motor positioned at a front portion of the vehicle body and coupled to the input shaft of the front differential gear device;

wherein an output shaft of the electric motor is disposed in parallel with the input shaft of the front differential gear device.

8. The utility vehicle according to claim 7, further comprising:

a coupling member for coupling to the vehicle body a portion of the front electric motor which is on an opposite side of a portion of the front electric motor which is coupled to the input shaft;

wherein the coupling member is elastically deformable.

9. The utility vehicle according to claim 7, further comprising:

right and left rear wheels suspended from the vehicle body;

a rear differential gear device provided mechanically independent of the front differential gear device, the rear differential gear device being coupled to the right and left rear wheels via a pair of rear axles, respectively; and

a rear electric motor coupled to the rear differential gear device;

wherein the front differential gear device includes a reduction gear mechanism which is disposed between an output shaft of the front electric motor and the input shaft of the front differential gear device, reduces a speed of rotation of the output shaft of the front electric motor and transmits rotation of the output shaft of the front electric motor to the input shaft of the front differential gear device at the reduced speed of rotation.

10. The utility vehicle according to claim 9,

wherein the output shaft of the front electric motor is disposed in parallel with the input shaft of the front differential gear device.

11. The utility vehicle according to claim 7,

wherein the front differential gear device includes a differential bevel gear mechanism;

and

the input shaft is deviated in one direction of a vehicle width direction from a center of the differential bevel gear mechanism, and the output shaft is deviated in an opposite direction of the vehicle width direction from the input shaft.

12. The utility vehicle according to claim 7,

right and left rear wheels suspended from the vehicle body;

a rear differential gear device provided mechanically independent of the front differential gear device, the rear differential gear device being coupled to the right and left rear wheels via a pair of rear axles, respectively; and

a rear electric motor coupled to the rear differential gear device;

wherein the front differential gear device includes a reduction gear mechanism which is disposed between an output shaft of the front electric motor and the input shaft of the front differential gear device, reduces a speed of rotation of the output shaft of the front electric motor and transmits rotation of the output shaft of the front electric motor to the input shaft of the front differential gear device at the reduced speed of rotation.

13. The utility vehicle according to claim 7,

wherein the front differential gear device includes a differential bevel gear mechanism;

and

the input shaft is deviated in one direction of a vehicle width direction from a center of the differential bevel gear mechanism, and the output shaft is deviated in an opposite direction of the vehicle width direction from the input shaft.

14. The utility vehicle according to claim 7, wherein the front differential gear device includes a reduction gear mechanism which is disposed between an output shaft of the front electric motor and the input shaft of the front differential gear device, reduces a speed of rotation of the output shaft of the front electric motor and transmits the rotation to the input shaft of the front differential gear device.

15. The utility vehicle according to claim 7, wherein the front electric motor is deviated in one direction of a vehicle width direction from a center of the vehicle, the one direction being opposite to a direction in which a steering wheel is deviated from the center of the vehicle in the vehicle width direction.

16. The utility vehicle according to claim 7, wherein the front electric motor is positioned forward relative to the front differential gear device.

17. The utility vehicle according to claim 7, wherein the front electric motor is positioned above relative to the front differential gear device.