Self-propelled work machine

• US 11,358,463 B2
• Filed: 11/26/2014
• Issued: 06/14/2022
• Est. Priority Date: 12/11/2013
• Status: Active Grant

• Current Assignee: Liebherr-Components Biberach Gmbh (Liebherr-International AG)
• Original Assignee: Liebherr-Components Biberach Gmbh (Liebherr-International AG)
• Inventors: Muenst, Thomas
• Primary Examiner(s): Vanaman, Frank B
• Application Number:
  US15/103,704
• Publication Number:
  US 20160311310A1
• Time in Patent Office: 2,757 Days
• CPC Class Codes: B60K 2007/0046 the motor moving together with the vehicle body, i.e. moving independently from the wheel axle
• CPC Class Codes: B60K 2007/0061 the motor axle being parallel to the wheel axle
• CPC Class Codes: B60K 2007/0069 the motor axle being perpendicular to the wheel axle
• CPC Class Codes: B60K 2007/0076 the motor axle being horizontal
• CPC Class Codes: B60K 2007/0084 the motor axle being vertical
• CPC Class Codes: B60K 7/0007 the motor being electric
• CPC Class Codes: B60Y 2200/25 Track vehicles
• CPC Class Codes: B60Y 2200/411 Bulldozers, Graders
• CPC Class Codes: B62D 55/06 with tracks without ground wheels
• CPC Class Codes: B62D 55/12 Arrangement, location, or adaptation of driving sprockets
• CPC Class Codes: E02F 3/76 Graders, bulldozers, or the like with scraper plates or ploughshare-like elements soil-working A01B; Levelling scarifying devices street cleaning E01H; construction of roads E01C19/00, E01C23/00
• CPC Class Codes: H02K 7/116 with gears
• CPC Class Codes: H02K 7/1163 where at least two gears have non-parallel axes without having orbital motion

Abstract

A self-propelled work machine, in particular a tracked vehicle, such as a bulldozer, having a traction drive comprising at least one electric motor for driving at least one chassis wheel, in particular a chain wheel or a sprocket. The motor axis of rotation of the electric motor is arranged displaced and/or angled with respect to the wheel axis of rotation of the chassis wheel to be driven by the electric motor.

Claims

1. A self-propelled work machine having at least one traction drive comprising at least one electric motor for driving at least one chassis wheel,

wherein a motor axis of rotation of the electric motor is displaced and/or angled with respect to a wheel axis of rotation of the chassis wheel to be driven by the electric motor,

wherein each of the at least one electric motor has an axial length which amounts to more than 50% of a track width of the work machine,

wherein the track width is a distance between two chassis wheels of the work machine, and

wherein the two chassis wheels are on opposite sides of a body of the work machine, and

wherein a moment of inertia of the at least one electric motor to a moment of inertia of the work machine is 0.4 to 0.95.

2. The self-propelled work machine in accordance with claim 1, wherein the work machine is a bulldozer, and wherein the at least one traction drive is formed as a single-wheel drive or as single-wheel drives.

3. The self-propelled work machine in accordance with claim 1, wherein chassis wheels disposed mutually opposite at different machine sides and/or associated with a same chassis axle are driven by two separate electric motors which are arranged overlapping one another as viewed transversely to the motor axes of rotation.

4. The self-propelled work machine in accordance with claim 3, wherein the motor axes of rotation of the electric motors are aligned in parallel with one another, and wherein the two separate electric motors overlap one another over at least 50% of their longitudinal extents as viewed transversely to the motor axes of rotation.

5. The self-propelled work machine in accordance with claim 4, wherein the two separate electric motors are aligned in parallel with one another and overlap one another over 100% of their longitudinal extents.

6. The self-propelled work machine in accordance with claim 3, wherein the motor axis of rotation of each of the two separate electric motors is oriented lying transversely to a direction of travel and is arranged displaced in the direction of travel with respect to wheel axes of rotation of the chassis wheels to be driven by the two separate electric motors.

7. The self-propelled work machine in accordance with claim 6, wherein one of the two separate electric motors is arranged displaced to the front in the direction of travel with respect to the wheel axes of rotation and the other electric motor of the two electric motors is arranged displaced to the rear in the direction of travel with respect to the wheel axes of rotation.

8. The self-propelled work machine in accordance with claim 7, wherein both of the two separate electric motors are arranged displaced upwardly beyond a level of the wheel axes of rotation;

and

wherein both of the two separate electric motors are oriented perpendicular to a vertical longitudinal central plane of the work machine.

9. The self-propelled work machine in accordance with claim 3, wherein the two separate electric motors are each aligned in parallel with a vertical longitudinal central plane of the work machine.

10. The self-propelled work machine in accordance with claim 9, wherein the two separate electric motors are oriented in an upright manner.

11. The self-propelled work machine in accordance with claim 10, wherein the two separate electric motors are aligned in parallel with one another and are arranged standing next to one another directly above wheel axes of rotation of the oppositely disposed chassis wheels, wherein the motor axes of rotation intersect the wheel axes of rotation at a right angle.

12. The self-propelled work machine in accordance with claim 1, wherein the at least one electric motor has a length in a range from 100% to 500% of a diameter of the at least one electric motor.

13. The self-propelled work machine in accordance with claim 1, wherein the motor axis of rotation of the at least one electric motor is aligned in parallel with a vertical longitudinal central plane of the work machine and is connected to the chassis wheel to be driven via a miter gear stage;

and

wherein the at least one electric motor is directly above the wheel axis of rotation.

14. The self-propelled work machine in accordance with claim 13, wherein the miter gear stage comprises a bevel gear stage, and wherein the motor axis of rotation intersects the wheel axis of rotation at a right angle.

15. The self-propelled work machine in accordance with claim 13, wherein the miter gear stage comprises a hypoid gear stage and the motor axis of rotation is displaced vertically with respect to the wheel axis of rotation of the chassis wheel to be driven by the at least one electric motor.

16. The self-propelled work machine in accordance with claim 15, wherein the miter gear stage is set higher with respect to the wheel axis of rotation of the at least one chassis wheel to be driven by the at least one electric motor.

17. The self-propelled work machine in accordance with claim 1, wherein the work machine is a tracked vehicle, and wherein the at least one chassis wheel is a chain wheel or a sprocket.

18. A self-propelled work machine having at least one traction drive comprising at least one electric motor for driving at least one chassis wheel,

wherein a motor axis of rotation of the electric motor is angled with respect to a wheel axis of rotation of the chassis wheel to be driven by the electric motor, and

wherein a moment of inertia of the at least one electric motor to a moment of inertia of the work machine is 0.4 to 0.95.