WORK MACHINE

• US 20110005848A1
• Filed: 02/26/2009
• Published: 01/13/2011
• Est. Priority Date: 02/29/2008
• Status: Active Grant

• Current Assignee: Volvo Construction Equipment AB (Volvo AB)
• Original Assignee: Volvo Construction Equipment AB (Volvo AB)
• Inventors: Thoursie, Jonas, Dymling, Kajsa, Bergqvist, Per-Olof, Kvist, Roland, Miller, Marcus
• Granted Patent: US 8,899,362 B2
• Time in Patent Office: Days
• US Class Current: 180/65.22
• CPC Class Codes: B60K 17/356 having fluid or electric motor, for driving one or more wheels disposition of motor in, or adjacent to, traction wheel B60K7/00
• CPC Class Codes: B60Y 2200/14 Trucks; Load vehicles, Busses
• CPC Class Codes: B60Y 2200/142 Heavy duty trucks
• CPC Class Codes: B60Y 2200/147 Trailers, e.g. full trailers or caravans
• CPC Class Codes: B62D 53/005 Combinations with at least three axles and comprising two or more articulated parts articulated buses B62D47/025
• CPC Class Codes: B62D 59/04 driven from propulsion unit on trailer

Abstract

A work machine includes a front section with a front frame, a first set of ground engaging members and a power source for propelling the work machine, a rear section with a rear frame, a second set of ground engaging members and a load-carrying container. The rear section includes an electric drive system adapted for driving at least one ground engaging member of the second set. The rear section is detachably connected to the front section. The power source of the front section is adapted to power the electric drive system in the rear section in an attached state of the front and rear sections. The electric drive system is adapted for driving the at least one ground engaging member of the second set for self-propelling of the rear section in a detached state.

Claims

1. A work machine comprising

a front section with a front frame, a first set of ground engaging members and a power source for propelling the work machine,

a rear section with a rear frame, a second set of ground engaging members and a load-carrying container, wherein

the rear section comprises an electric drive system adapted for driving at least one ground engaging member of the second set,

the rear section is detachably connected to the front section,

the power source of the front section is adapted to power the electric drive system in the rear section in an attached state of the front and rear sections, and

the electric drive system is adapted for driving said the at least one ground engaging member of the second set for self-propelling of the rear section in a detached state.

2. The work machine according to claim 1, wherein the electric drive system comprises at least one electric motor.

3. The work machine according to claim 2, wherein the electric drive system comprises at least one electric power storing means, which is operatively connected to the at least one electric motor.

4. The work machine according to claim 2, wherein the work machine comprises at least two electric motors and that each electric motor is adapted to drive an individual ground engaging member.

5. The work machine according to claim 1, wherein the power source comprises means for generating mechanical power.

6. The work machine according to claim 5, wherein the means for generating mechanical power comprises an internal combustion engine.

7. The work machine according to claim 6, wherein the front section comprises means for mechanical transmission of power from the mechanical power generating means to the first set of ground engaging members.

8. The work machine according to claim 1, wherein the power source comprises an electric machine for providing electric power.

9. The work machine according claim 5, wherein the power source comprises and electric machine for providing electric power and the electric machine is operatively connected to the means for generating mechanical power for converting the mechanical power to electric power.

10. The work machine according to claim 8, wherein the work machine comprises means for electrical transmission of power from the electric machine to the at least one electric motor.

11. The work machine according to claim 1, wherein the work machine comprises at least one pivot joint between the front section and the rear section allowing the front section to pivot with regard to the rear section in the attached state.

12. The work machine according to claim 10, wherein the work machine comprises at least one pivot joint between the front section and the rear section allowing the front section to pivot with regard to the rear section in the attached state, and the electrical transmission means comprises a line for transmission of electric power to the electric motor and that the electric power transmission line extends through the pivot joint (21, 25).

13. The work machine according to claim 11, wherein the work machine comprises a first pivot joint adapted to allow the front section to pivot with regard to the rear section about an axis extending in a longitudinal direction of the work machine.

14. The work machine according to claim 11, wherein the work machine comprises a second pivot joint adapted to allow the front section to pivot with regard to the rear section about an axis extending in a vertical direction of the work machine.

15. The work machine according to claim 14, wherein the work machine comprises means for steering the work machine via pivoting the front section relative to the rear section about the vertical pivot axis.

16. The work machine according to claim 15, wherein the steering means comprises a hydraulic actuator arranged on each side of the second pivot joint.