Preparation for machine repositioning in an excavating operation

• US 20080133093A1
• Filed: 11/30/2006
• Published: 06/05/2008
• Est. Priority Date: 11/30/2006
• Status: Active Grant

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Price, Robert J., Koch, Roger D., Alig, Jeffrey S., Stanek, Daniel
• Granted Patent: US 7,753,132 B2
• Time in Patent Office: Days
• US Class Current: 701/50
• CPC Class Codes: E02F 9/085 Ground-engaging fitting for supporting the machines while working, e.g. outriggers, legs for vehicles in general B60S9/00, for cranes B66C23/78
• CPC Class Codes: E02F 9/20 Drives; Control devices gearings in general F16H; controlling in general G05; electric multi-motor drives H02K, H02P

Abstract

A method of controlling a machine during an excavating operation is provided. Stabilizers are deployed to ground contact to stabilize the machine at a first set-up position. Excavating is performed with an excavating assemblage during a first excavating phase while the machine is stabilized at the first set-up position. An automated machine preparation for repositioning mode is initiated for preparing the machine, after the excavating phase, for repositioning to a second set-up position for a second excavating phase, by activating an input device to send input signals to a controller. Output signals are delivered from the controller to control automated machine preparation for repositioning to the second set-up position.

Claims

1. A method of controlling a machine during an excavating operation, comprising:

deploying stabilizers to ground contact to stabilize the machine at a first set-up position;

excavating with an excavating assemblage during a first excavating phase while the machine is stabilized at the first set-up position;

initiating an automated machine preparation for repositioning mode for preparing the machine, after the excavating phase, for repositioning to a second set-up position for a second excavating phase, by activating an input device to send input signals to a controller; and

delivering output signals from the controller to control automated machine preparation for repositioning to the second set-up position.

2. The method of claim 1, wherein delivering output signals includes delivering output signals to:

reduce machine engine speed to a level below the machine engine speed employed during excavating;

retract the stabilizers from ground contact;

move the excavating assemblage to a stowed position; and

engage a machine transmission gear suitable for facilitating machine repositioning.

3. The method of claim 2, including,

during the automated preparation for machine repositioning mode, delivering output signals from the controller to further reduce machine engine speed to idle after the stabilizers are retracted and the excavating assemblage is moved to stowed position, and before engagement of a machine transmission gear suitable for facilitating machine repositioning.

4. The method of claim 2, wherein the machine includes a front loader assembly including a loader bucket, further including:

forcing the loader bucket into ground contact to further stabilize the machine during the first excavating phase at the first set-up position;

and wherein delivering output signals includes delivering output signals to retract the loader bucket from ground contact.

5. The method of claim 4, wherein initiating an automated machine preparation for repositioning mode includes activating a touch screen display, and delivering output signals includes delivering output signals to, in the following order:

reduce machine engine speed to a level below the machine engine speed employed during excavating;

move the excavating assemblage to a stowed position;

retract the loader bucket from ground contact;

retract the stabilizers from ground contact;

further reduce machine engine speed; and

shift a machine transmission into a gear suitable to facilitate machine repositioning.

6. The method of claim 1, wherein initiating an automated machine preparation for repositioning mode is selected from the group consisting of:

activating a touch screen display;

moving a toggle switch;

pressing a button; and

manipulating a control lever.

7. The method of claim 1, further including

excavating a portion of a trench at the first set-up position and during the first excavating phase;

preparing the machine for repositioning during the automated machine preparation for repositioning mode;

repositioning the machine; and

excavating another portion of the trench at the second set-up position and during the second excavating phase.

8. A system for controlling a machine during an excavating operation, comprising:

an excavating assemblage;

a plurality of machine elements configured to facilitate machine set-up during an excavating operation; and

a control system configured to control the excavating assemblage to excavate material during a first excavating phase at a first machine set-up position, the control system being configured to control the plurality of machine elements during an automated machine preparation for repositioning mode after an excavating phase, for preparing the machine for repositioning to a second set-up position for a second excavating phase.

9. The system of claim 8, wherein the excavating assemblage includes a backhoe mechanism including a swing assembly, a boom, a stick, and a bucket, and wherein the control system is configured to move the backhoe mechanism to a stowed position during the automated machine preparation for repositioning mode.

10. The system of claim 9, wherein the backhoe mechanism is mounted at the rear of the machine, and wherein one of the plurality of machine elements includes a front loader assembly mounted at the front of the machine.

11. The system of claim 10, wherein the front loader assembly includes a loader bucket configured to be moved into ground contact during an excavating phase, and wherein the control system is configured to retract the loader bucket from ground contact during an automated machine preparation for repositioning mode.

12. The system of claim 8, wherein the control system includes an input device for permitting operator input, and a control module for receiving input signals from the input device and for delivering output signals at least to the plurality of machine elements for controlling the plurality of machine elements during automated machine preparation for repositioning mode.

13. The system of claim 12, wherein the input device includes at least one of a touch screen display, a joystick, a switch, and a button.

14. The system of claim 8, wherein the plurality of machine elements includes a pair of stabilizers mounted on the machine and configured to be deployed into ground contact for stabilizing the machine during an excavating phase, and wherein the control system is configured to retract the stabilizers from ground contact during automated machine preparation for repositioning mode.

15. A machine for excavating during a plurality of excavating phases, comprising:

an engine and a transmission mounted on the machine;

an excavating assemblage including a boom pivoted to the machine, a stick pivoted to the boom, and a bucket pivoted to the stick; and

a control system configured to control the excavating assemblage to excavate material during a first excavating phase at a first machine set-up position, the control system being configured to control machine elements during an automated machine preparation for repositioning mode after an excavating phase, for preparing the machine for repositioning to a second set-up position for a second excavating phase.

16. The machine of claim 15, wherein the control system includes an operator input device configured to permit an operator to initiate the automated machine preparation for repositioning mode.

17. The machine of claim 16, including:

an operator station including a seat movable to a position facing toward the machine front and movable to a position facing toward the machine rear;

wherein the input device is positioned proximate the operator station so as to enable an operator to initiate an automated machine preparation for repositioning mode, for repositioning the machine when the operator is in the seat and the seat is in a position facing toward the machine rear.

18. The machine of claim 15, including a pair of stabilizers movably mounted to the machine for ground contact during an excavating phase, a front loader bucket movably attached at the front of the machine for ground contact during an excavating phase, and wherein the boom is pivoted at the rear of the machine.

19. The machine of claim 18, wherein, during the automated machine preparation for repositioning mode, the control system is configured to initiate retraction of the loader bucket from ground contact, initiate retraction of the stabilizers from ground contact, and initiate shifting of the transmission into a gear suitable for machine repositioning.

20. The machine of claim 18, wherein the control system includes a touch screen display configured to enable a machine operator to initiate an automated machine preparation for repositioning mode, a control module configured for receiving input signals from the touch screen display and configured for delivering output signals to:

reduce machine engine speed to a level below the machine engine speed employed during excavating;

move the excavating assemblage to a stowed position;

retract the loader bucket from ground contact;

retract the pair of stabilizers from ground contact;

further reduce machine engine speed; and

engage a transmission gear suitable for machine repositioning.