Stick for linkage assembly of machine

• US 9,650,756 B2
• Filed: 07/28/2014
• Issued: 05/16/2017
• Est. Priority Date: 07/28/2014
• Status: Active Grant

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Ulrich, William J., Forck, James A., Inturi, Tilak
• Primary Examiner(s): Lowe, Scott
• Application Number:
  US14/444,546
• Publication Number:
  US 20160024744A1
• Time in Patent Office: 1,023 Days
• CPC Class Codes: E02F 3/32 working downwardly and towards the machine, e.g. with backhoes
• CPC Class Codes: E02F 3/38 Cantilever beams , i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms for booms with cable suspension arrangements E02F9/14 takes precedence; Dipper-arms , e.g. manufacturing processes, forms, geometry or materials used for dipper-arms; Bucket-arms E02F3/34 takes precedence

Abstract

A stick for a linkage assembly of an implement system includes a stick body and a stick joint assembly. The stick body defines a neutral axis and includes a pair of sidewalls in lateral spaced relationship to each other, a top portion extending between the pair of sidewalls, and a bottom portion extending between the pair of sidewalls, which define an interior cavity. The stick joint assembly includes a stick joint tube and a stick joint reinforcement plate. The stick joint tube extends between and is connected to the sidewalls. The stick joint reinforcement plate is connected to one of the pair of sidewalls and includes a pair of arms extending from a central portion. The ends of the first and second arms of are disposed along the neutral axis of the stick body.

Claims

1. A stick for a linkage assembly of an implement system, the stick comprising:

a stick body, the stick body including a pair of sidewalls, in lateral spaced relationship to each other, a top portion extending between the pair of sidewalls, and a bottom portion extending between the pair of sidewalls, the pair of sidewalls, the top portion, and the bottom portion defining an interior cavity, each of the pair of sidewalls defining therein a stick pivot opening, and the stick body defining a neutral axis; and

a stick joint assembly, the stick joint assembly including a stick joint tube and a stick joint reinforcement plate, the stick joint tube extending between and connected to the pair of sidewalls, the stick joint tube disposed within the stick pivot opening of both of the pair of sidewalls, and the stick joint reinforcement plate connected to one of the pair of sidewalls, the stick joint reinforcement plate including a central portion defining a tube opening, the central portion in circumscribing relationship with the stick joint tube such that the stick joint tube is disposed within the tube opening, a first arm extending from the central portion and having a first end, and a second arm extending from the central portion and having a second end, wherein the first end and the second end of the stick joint reinforcement plate are disposed along the neutral axis of the stick both, and wherein the stick joint reinforcement plate includes an outer perimeter, the outer perimeter having a concave segment, and the concave segment extending between the first end and the second end.

2. The stick for a linkage assembly according to claim 1, wherein the first arm of the stick joint reinforcement plate extends along a first arm axis, the second arm of the stick joint reinforcement plate extends along a second arm axis, the first arm axis and the second arm axis defining an arm angle therebetween, the arm angle being in a range between 45°

and 135°

.

3. The stick for a linkage assembly according to claim 1, wherein the first arm of the stick joint reinforcement plate extends along a first arm axis, the second arm of the stick joint reinforcement plate extends along a second arm axis, the first arm axis and the second arm axis defining an arm angle therebetween, the arm angle being in a range between 65°

and 115°

.

4. The stick for a linkage assembly according to claim 1, wherein the first arm of the stick joint reinforcement plate extends along a first arm axis, the second arm of the stick joint reinforcement plate extends along a second arm axis, the first arm axis and the second arm axis being substantially perpendicular to each other.

5. The stick for a linkage assembly according to claim 1, wherein the stick joint reinforcement plate comprises a first stick joint reinforcement plate, and the stick joint assembly includes a second stick joint reinforcement plate, the second stick joint reinforcement plate connected to the other of the pair of sidewalls.

6. The stick for a linkage assembly according to claim 1, wherein the stick body is substantially free of structural weldments disposed within the interior cavity of the stick body.

7. The stick for a linkage assembly according to claim 1, wherein the first end and the second end of the stick joint reinforcement plate each includes a convex distal perimeter segment.

8. The stick for a linkage assembly according to claim 7, wherein the convex distal perimeter segment of the first end and the second end has a first radius of convex curvature and a second radius of convex curvature, respectively, the first radius of convex curvature and the second radius of convex curvature being substantially the same.

9. The stick for a linkage assembly according to claim 7, wherein the concave segment extends between the convex distal perimeter segment of the first end and the second end.

10. The stick for a linkage assembly according to claim 9, wherein the outer perimeter of the stick joint reinforcement plate includes a first arm segment and a second arm segment, the first arm segment and the second arm segment being generally linear, the convex distal perimeter segment of the first end being disposed between the first arm segment and the concave segment, and the convex distal perimeter segment of the second end being disposed between the second arm segment and the concave segment.

11. A machine comprising:

a frame, the frame including a power system configured to supply power to the machine and an operator station configured to selectively operate the machine; and

an implement system pivotally connected to the frame, the implement system in operable arrangement with the power system and the operator station such that the implement system is selectively movable by the operator station from power supplied by the power system, the implement system including a boom pivotally coupled to the frame, a stick pivotally coupled to the boom, and an implement pivotally coupled to the stick;

wherein the stick includes a stick body and a stick joint assembly;

the stick body including a pair of sidewalls in lateral spaced relationship to each other, a top portion extending between the pair of sidewalls, and a bottom portion extending between the pair of sidewalls, the pair of sidewalls, the top portion, and the bottom portion defining an interior cavity, each of the pair of sidewalls defining therein a stick pivot opening, and the stick body defining a neutral axis, and

the stick joint assembly pivotally coupling the stick to the boom, the stick joint assembly including a stick joint tube and a stick joint reinforcement plate, the stick joint tube extending between and connected to the pair of sidewalls, the stick joint tube disposed within the stick pivot opening of both of the pair of sidewalls, and the stick joint reinforcement plate connected to one of the pair of sidewalls, the stick joint reinforcement plate including a central portion, a first arm, and a second arm, the central portion defining a tube opening, the central portion in circumscribing relationship with the stick joint tube such that the stick joint tube is disposed within the tube opening thereof, the first arm extending from the central portion and having a first end, and the second arm extending from the central portion and having a second end, wherein the first end and the second end of the stick joint reinforcement plate are disposed along the neutral axis of the stick body, and wherein the stick joint reinforcement plate include an outer perimeter, the outer perimeter having a concave segment, and the concave segment extending between the first end and the second end.

12. The machine according to claim 11, wherein the first arm of the stick joint reinforcement plate extends along a first arm axis, the second arm of the stick joint reinforcement plate extends along a second arm axis, the first arm axis and the second arm axis defining an arm angle therebetween, the arm angle being in a range between 45°

and 135°

.

13. The machine according to claim 11, wherein the boom includes a proximal boom pivot end, a stick actuator pivot bracket, a boom actuator joint assembly, and a distal boom nose, the boom pivotally connected to the frame at the proximal boom pivot end;

the stick includes a proximal stick actuator pivot end and an implement actuator pivot bracket; and

the implement system includes a boom actuator, a stick actuator, and an implement actuator, the boom actuator pivotally connected at a proximal end thereof to the frame and at a distal end thereof to the boom actuator joint assembly, the stick actuator pivotally connected at a proximal end thereof to the stick actuator pivot bracket of the boom and at a distal end thereof to the proximal stick actuator pivot end of the stick, and the implement actuator is pivotally connected at a proximal end thereof to the implement actuator pivot bracket of the stick and at a distal end thereof to the implement, the boom actuator, the stick actuator, and the implement actuator in operable arrangement with the power system and the operator station for selective movement thereof.

14. The machine of claim 13, wherein the implement comprises a bucket with a bucket linkage assembly, the distal end of the implement actuator being pivotally connected to the bucket linkage assembly.

15. The machine of claim 13, further comprising:

an undercarriage, the frame pivotally connected to the undercarriage, the undercarriage in operable arrangement with the power system to selectively propel the machine.

16. A method of making a stick for a linkage assembly of an implement system, the method comprising:

fabricating a stick body, the stick body including a pair of sidewalls in lateral spaced relationship to each other, a top portion extending between the pair of sidewalls, and a bottom portion extending between the pair of sidewalls, the pair of sidewalls, the top portion, and the bottom portion defining an interior cavity, each of the pair of sidewalls defining therein a stick pivot opening, and the stick body defining a neutral axis; and

connecting a stick joint assembly to the stick body, the stick joint assembly including a stick joint tube and a stick joint reinforcement plate, the stick joint tube extending between and connected to the pair of sidewalls, the stick joint tube disposed within the stick pivot opening of both of the pair of sidewalls, and the stick joint reinforcement plate connected to one of the pair of sidewalls, the stick joint reinforcement plate including a central portion defining a tube opening, the central portion in circumscribing relationship with the stick joint tube such that the stick joint tube is disposed within the tube opening, a first arm extending from the central portion and having a first end, and a second arm extending from the central portion and having a second end, wherein the first end and the second end of the stick joint reinforcement plate are disposed along the neutral axis of the stick body, and wherein the stick joint reinforcement plate includes an outer perimeter, the outer perimeter having a concave segment, and the concave segment extending between the first end and the second end.

17. The method according to claim 16, wherein the stick body is fabricated by welding the pair of sidewalls to the top portion and to the bottom portion such that the interior cavity of the stick body is substantially free of structural weldments.

18. The method according to claim 17, wherein the stick body is fabricated such that the interior cavity is free of;

a transverse structural member that both extends between the pair of sidewalls and has a structural weldment disposed within the interior cavity of the stick body.

19. The method according to claim 16, further comprising:

fabricating the stick joint assembly such that the stick joint assembly is fabricated without using a forging operation.

20. The method according to claim 19, wherein the stick joint reinforcement plate is fabricated such that the first aim of the stick joint reinforcement plate extends along a first arm axis, and the second arm of the stick joint reinforcement plate extends along a second arm axis, the first arm axis and the second arm axis defining an arm angle therebetween, the arm angle being in a range between 45°

and 135°

.