Joystick assembly for improved machine control

• US 8,212,770 B2
• Filed: 02/10/2009
• Issued: 07/03/2012
• Est. Priority Date: 02/11/2008
• Status: Active Grant

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Obourn, Roger G., Vazquez, Matthew, Kopp, Gregory R., Shearer, Daniel E., Stamate, Robert L., Stievenart, Gregory A.
• Primary Examiner(s): Lao, Lun-Yi
• Assistant Examiner(s): Lee, Gene W
• Application Number:
  US12/368,619
• Publication Number:
  US 20090201250A1
• Time in Patent Office: 1,239 Days
• Field of Search: 345156-162, 463 37- 38, 744/71.XY
• US Class Current: 345/161
• CPC Class Codes: G05G 9/047 the controlling member being movable by hand about orthogonal axes, e.g. joysticks for switches H01H25/04
• CPC Class Codes: Y10T 74/20201 Control moves in two planes

Abstract

A joystick assembly that provides enhanced operator control and stability during rough operation by being primarily rotatable about a vertical axis of a clockspring. The joystick assembly also includes a palm support that is associated with the clockspring via a clamp in the lower housing of the palm support. Further, the joystick assembly has an interface device that includes at least one input device that is conveniently actuated by an operator'"'"'s thumb.

Claims

1. A joystick assembly comprising:

a clockspring base having a vertical axis; and

a grip assembly including a palm support and an interface device configured to generate electrical signals, the grip assembly being rotatably attached to the clockspring base such that the grip assembly only rotatably pivots about the vertical axis in a plane generally perpendicular to the vertical axis, wherein the palm support intersects the vertical axis,

wherein the clockspring base further includes a clockspring configured to provide rotatable movement around the vertical axis relative to the clockspring base, the clockspring operable to maintain electrical communication from the interface device to an electronic control unit during rotation of the clockspring.

2. The joystick assembly of claim 1, wherein the palm support further includes a data wire coupled between the interface device and the clockspring.

3. The joystick assembly of claim 1, wherein the palm support further includes a wire connector to couple to the clockspring.

4. The joystick assembly of claim 3, wherein the clockspring further includes a main harness configured to mate with the wire connector.

5. The joystick assembly of claim 1, wherein the interface device further includes three input devices.

6. The joystick assembly of claim 5, wherein the interface device further includes three data wires, the interface device being configured such that each data wire is connected to one input device and such that each data wire is also connected to a wire connector to couple to the clockspring.

7. The joystick assembly of claim 5, wherein the input devices are a speed input control having variable input settings, a transmission input control, and a resume speed control.

8. The joystick assembly of claim 1, wherein the palm support further includes a data wire and a wire connector to which the data wire is terminated, the clockspring includes a main harness connected to the wire connector.

9. The joystick assembly of claim 1, wherein the clockspring is operable to generate electrical communication to the electronic control unit during rotation of the joystick assembly.

10. A joystick assembly comprising:

a clockspring base including a clockspring, the clockspring configured to provide rotatable movement around a vertical axis relative to the clockspring base; and

a grip assembly including a palm support and an interface device;

wherein the palm support includes an upper housing and a lower housing and the interface device, the upper housing disposed about an upper housing axis, the interface device operable to generate electrical signals and the clockspring operable to facilitate electrical communication between the interface device and an electronic control unit during rotation of the clockspring; and

wherein the joystick assembly is only rotatable about the vertical axis of the clockspring, the vertical axis being generally perpendicular to the upper housing axis.

11. The joystick assembly of claim 10, wherein the palm support further includes a data wire coupled between the interface device and the clockspring.

12. The joystick assembly of claim 10, wherein the palm support further includes a wire connector to couple to the clockspring.

13. The joystick assembly of claim 12, wherein the clockspring further includes a main harness configured to mate with the wire connector.

14. The joystick assembly of claim 10, wherein the interface device has three input devices.

15. The joystick assembly of claim 14, wherein the input devices are a speed input control having variable input settings, a transmission input control, and a resume speed control.