Electronic implement control

• US 5,467,541 A
• Filed: 09/26/1991
• Issued: 11/21/1995
• Est. Priority Date: 09/26/1991
• Status: Expired due to Term

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Hosseini, Javad, Greer, Robert D., Simmons, Gerald P., Rytter, Noel J., Henderson, Daniel E.
• Primary Examiner(s): Reese, Randolph A.
• Assistant Examiner(s): BATSON, VICTOR D
• Application Number:
  US08/030,286
• Time in Patent Office: 1,517 Days
• Field of Search: 37/348, 414/699, 74/540, 172/2, 364/424.07
• US Class Current: 37/348
• CPC Class Codes: E02F 9/2004 Control mechanisms, e.g. control levers control levers per se G05G
• CPC Class Codes: E02F 9/2041 Automatic repositioning of implements, i.e. memorising determined positions of the implement for dipper-arms or bucket-arms E02F3/434, E02F3/437, E02F3/438, E02F3/439 take precedence
• CPC Class Codes: G05G 19/00 Servo-mechanisms with follow-up action, e.g. occurring in steps

Abstract

Vehicles (12) having implements (14) are typically used to perform repetitive functions in work cycles. Advantageously, such vehicles (12) include control systems (10) for maintaining a control lever (26) in a predetermined position until an associated work cycle function is completed. The subject control (10) includes a rocker bar (46) connected to the control lever (26) and a solenoid (50) having an actuator rod (52) disposed adjacent the rocker bar (46). The control (10) energizes the solenoid (50) to hold the control lever (26) in the predetermined position in response to a position of the implement (14), a position of the control lever (26), and a desired kickout position.

Claims

1. An apparatus for controlling an implement connected to a work vehicle and movable to and between a plurality of positions, comprising:

means for sensing the position of the implement and responsively producing an implement position signal;

a mounting bracket connected to the vehicle;

a control lever being pivotably connected to said mounting bracket and movable between first and second positions;

a rocker bar connected to said control lever;

means for producing a control signal in response to movement of the control lever;

a solenoid having an actuator rod being in contact with said rocker bar and movable to a detent position in response to said solenoid being energized; and

detent control means for controllably energizing said solenoid in response to said control signal having a value indicative of the control lever being moved beyond a detent position and said implement position signal being indicative of the implement having a predetermined relationship with a set position and deenergizing said solenoid in response to the implement position signal being indicative of the implement having a second predetermined relation with said set position.

2. An apparatus (10), as set forth in claim 1, including:

an implement control (70) for receiving said control signal and responsively producing an implement signal; and

means (18) for moving the implement (14) in response to the implement signal.

3. An apparatus for controlling an implement connected to a work vehicle and movable to and between a plurality of positions, comprising:

means for sensing the position of the implement and responsively producing an implement position signal;

means for selecting a desired kickout position;

a mounting bracket connected to the vehicle;

a control lever being pivotably connected to said mounting bracket and movable between first and second positions;

a rocker bar connected to said control lever;

means for producing a control signal in response to movement of the control lever;

a solenoid having an actuator rod being in contact with said rocker bar and movable to a detent position in response to said solenoid being energized;

a biasing means for urging said actuator rod toward said detent position; and

detent control means for controllably energizing said solenoid in response to said control signal having a value indicative of the control lever being moved beyond a detent position and said implement position signal being indicative of the implement having a predetermine relationship with and deenergizing said solenoid in response to the implement being substantially in the desired kickout position.

4. An apparatus (10), as set forth in claim 3, including:

a control shaft (32) connected to and between said control lever (26) and said mounting plate (30) and having a longitudinal axis;

a first gear (44) connected to said control shaft (32) and being pivotally movable about said axis in response to movement of the control lever (26); and

a second gear (64) connected to and between said first gear (44) and said control signal producing means (62).

5. An apparatus (10), as set forth in claim 3, wherein the control signal is a pulse-width modulated signal having a duty cycle being dependent upon the position of the control lever (26).

6. An apparatus (10), as set forth in claim 3, including:

an implement control (70) for receiving said control signal and responsively producing an implement signal; and

means (18) for moving the implement (14) in response to the implement signal.

7. An apparatus for controlling an implement connected to a work vehicle and movable to and between a plurality of positions, comprising:

means for sensing the position of the implement and responsively producing an implement position signal;

a mounting bracket connected to the vehicle;

a control lever being pivotally connected to said mounting bracket and movable between first and second positions;

a rocker bar connected to said control lever;

means for producing a control signal in response to movement of the control lever;

an implement control for receiving said control signal and responsively producing an implement signal;

means for moving the implement in response to the implement signal;

a solenoid having an actuator rod being in contact with said rocker bar and movable to a detent position in response to said solenoid being energized; and

detent control means for energizing said solenoid in response to said control signal having a value indicative of the control lever being moved beyond a lower detent position and said implement position signal being indicative of the implement being below a predetermined return-to-dig position and for de-energizing said solenoid in response to the implement position signal being indicative of the implement being a predetermined distance below the predetermined return-to-dig position.

8. An apparatus (10), as set forth in claim 7, including means (76) for selecting a desired implement kickout position wherein the detent control means (72) deenergizes said solenoid (50) in response to the implement (14) being substantially in the kickout position.

9. An apparatus, as set forth in claim 7, including means for selecting a desired implement kickout position.

10. An apparatus (10), as set forth in claim 7, wherein:

said detent control means (72) energizes said solenoid (50) in response to said control signal having a value indicative of the control lever being moved beyond a raise detent position and said implement position signal being indicative of the implement being below a predetermined dump height and deenergizes said solenoid (50) in response to the implement position signal being indicative of the implement being a predetermined distance below the predetermined dump height; and

said implement control (70) produces said implement signal such that the implement (14) is moved to substantially the dump height.

11. An apparatus, as set forth in claim 7, wherein:

said implement control produces said implement signal such that the implement is moved to substantially the return-to-dig position.

12. An apparatus (10), as set forth in claim 7, including:

a control shaft (32) connected to and between said control lever (26) and said mounting plate (30) and having a longitudinal axis;

a first gear (44) connected to said control shaft (32) and being pivotally movable about said axis in response to movement of the control lever (26); and

a second gear (64) connected to and between said first gear (44) and said control signal producing means (62).

13. An apparatus for controlling an implement connected to a work vehicle and movable to and between a plurality of positions, comprising:

means for sensing the position of the implement and responsively producing an implement position signal;

means for selecting a desired kickout position;

a mounting bracket connected to the vehicle;

a control lever being pivotably connected to said mounting bracket and movable between first and second positions;

a rocker bar connected to said control lever;

a control shaft connected to and between said control lever and said mounting plate and having a longitudinal axis;

a first gear connected to said control shaft and being pivotally movable about said axis in response to movement of the control lever;

means for producing a control signal in response to movement of the control lever;

a second gear connected to and between said first gear and said control signal producing means;

an implement control for receiving said control signal and responsively producing an implement signal;

means for moving the implement in response to the implement signal;

a solenoid having an actuator rod being in contact with said rocker bar and movable to a detent position in response to said solenoid being energized;

a biasing means for urging said actuator rod toward said detent position; and

detent control means for controllably energizing said solenoid in response to said control signal having a value indicative of the control lever being moved beyond a raise detent position and said implement position signal being indicative of the implement being below a predetermined dump height and deenergizing said solenoid in response to the implement being substantially in the desired kickout position.

14. An apparatus, as set forth in claim 13, wherein said detent control means and deenergizes said solenoid in response to the implement position signal being indicative of the implement being substantially at the predetermined dump height.

15. An apparatus (10), as set forth in claim 13, wherein said detent control means (72) energizes said solenoid (50) in response to said control signal having a value indicative of the control lever being moved beyond a lower detent position and said implement position signal being indicative of the implement being above a predetermined return-to-dig position and deenergizes said solenoid (50) in response to the implement position signal being indicative of the implement being substantially at the predetermined return-to-dig position.