Operator-control device for a machine

• US 20080238352A1
• Filed: 03/30/2007
• Published: 10/02/2008
• Est. Priority Date: 03/30/2007
• Status: Active Grant

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Dattilo, James Donald, Erickson, Paul Robert, Cullen, Shawn Ivor, Durand, Joshua Bernard
• Granted Patent: US 7,675,258 B2
• Time in Patent Office: Days
• US Class Current: 318/575
• CPC Class Codes: G05G 1/04 Controlling members for hand actuation by pivoting movement, e.g. levers
• CPC Class Codes: G05G 2009/04766 providing feel, e.g. indexing means, means to create counterforce

Abstract

A machine includes an operator seat and an armrest adjacent the operator seat. The machine may also include a control system, which may include a control handle extending at least partially upward from the armrest. The control system may also include a force feedback device drivingly connected to the control handle and operable to supply feedback force to the control handle. The force-feedback device may include at least one of an actuator or a brake. Additionally, the control system may automatically adjust the magnitude of the feedback force supplied to the control handle by the force feedback device in at least some circumstances.

Claims

1. A machine, comprising:

an operator seat;

an armrest adjacent the operator seat; and

a control system, including

a control handle extending at least partially upward from the armrest, and

a force-feedback device drivingly connected to the control handle and operable to supply feedback force to the control handle, the force-feedback device including at least one of an actuator or a brake, wherein the control system automatically adjusts the magnitude of feedback force supplied to the control handle by the force-feedback device in at least some circumstances.

2. The machine of claim 1, wherein:

the control handle is rotatable around a first axis; and

the force-feedback device includes a rotary-drive member that is drivingly connected to the control handle, the rotary-drive member being rotatable around a second axis.

3. The machine of claim 2, wherein the second axis is disposed below a plane that extends laterally through the first axis.

4. The machine of claim 1, wherein:

the armrest includes a upper surface, a first side surface, and a second side surface; and

the force-feedback device is disposed between the first side surface and the second side surface.

5. The machine of claim 1, wherein the control handle is rotatable around an axis that extends at an angle of less than about 45 degrees to a direction in which the operator seat faces.

6. The machine of claim 1, wherein the force-feedback device includes an actuator.

7. The machine of claim 1, wherein the force-feedback device includes an electric motor.

8. The machine of claim 1, wherein the force-feedback device includes a rotary-drive member drivingly connected to the control handle, wherein the connection between the rotary drive member and the control handle converts an output torque supplied by the force-feedback device at the rotary-drive member into a larger torque on the control handle.

9. The machine of claim 1, wherein:

the machine is a mobile machine; and

the control system further includes a steering system that controls the direction of travel of the machine based at least in part on the position of the control handle.

10. A method of operating a machine, the machine having an operator seat, an armrest adjacent the operator seat, and a control system, the method comprising:

supporting a control handle of the control system with the control handle extending at least partially upward from the armrest;

generating an electrical signal related to one or more aspects of the motion of the control handle and supplying the electrical signal to one or more components of the control system; and

supplying feedback force to the control handle with a force-feedback device, including adjusting the magnitude of the feedback force based on one or more operating conditions of the machine.

11. The method of claim 10, wherein:

supporting the control handle includes allowing the control handle to rotate around a first axis; and

supplying the feedback force to the control handle with the force-feedback device includes operating the force-feedback device to generate an output torque with a rotary drive member of the force-feedback device, the rotary-drive member rotating about a second axis.

12. The method of claim 10, wherein:

supporting the control handle includes allowing the control handle to rotate around an axis; and

supplying feedback force to the control handle with the force-feedback device includes generating output torque with a rotary-drive member of the force feedback device and converting the output torque into a larger torque on the control handle.

13. The method of claim 10, wherein the signal indicates a position of the control handle.

14. The method of claim 10, wherein:

the machine is a mobile machine; and

the method further includes controlling the direction of travel of the mobile machine based at least in part on motion of the control handle.

15. A machine, comprising:

an operator seat;

a floor adjacent the operator seat;

an armrest adjacent the operator seat; and

a control system, including

a control handle extending at least partially upward from the armrest,

a force-feedback device disposed above the floor, the force feedback device being drivingly connected to the control handle and operable to supply feedback force to the control handle, and

wherein the control system automatically adjusts the magnitude of feedback force supplied to the control handle by the force-feedback device in at least some circumstances.

16. The machine of claim 15, wherein:

the armrest includes an upper surface; and

the force-feedback device is underneath the upper surface of the armrest.

17. The machine of claim 16, wherein:

the armrest includes a first side surface below the upper surface and a second side surface below the upper surface; and

the force-feedback device is disposed between the first side surface and the second side surface.

18. The machine of claim 15, wherein the force-feedback device is disposed at least partially inside the armrest.

19. The machine of claim 15, wherein:

the control handle is rotatable around a first axis; and

the force-feedback device includes a rotary-drive member drivingly connected to the control handle, the rotary-drive member being rotatable around a second axis.

20. The machine of claim 15, wherein the control handle is rotatable around an axis disposed at an angle of less than about 45 degrees to a direction in which the seat faces.