Lock assembly for securing a wear member to earth-working equipment

• US 7,874,086 B2
• Filed: 04/24/2007
• Issued: 01/25/2011
• Est. Priority Date: 04/24/2007
• Status: Active Grant

• Current Assignee: ESCO Group LLC (WEIR Group PLC)
• Original Assignee: ESCO Corporation (WEIR Group PLC)
• Inventors: Lian, Aaron B., Briscoe, Terry L., Carpenter, Christopher M.
• Primary Examiner(s): Beach; Thomas A
• Application Number:
  US11/789,801
• Publication Number:
  US 20080263913A1
• Time in Patent Office: 1,372 Days
• Field of Search: 37446-460, 172/772, 172/772.5, 1727011-7013, 172/719, 172/753, 403/374.1, 403/379.4, 403/379.2, 403/321, 403/322.4, 403/324
• US Class Current: 37/455
• CPC Class Codes: E02F 9/2833 Retaining means, e.g. pins
• CPC Class Codes: Y10T 403/59 Manually releaseable latch type
• CPC Class Codes: Y10T 403/7064 by wedge or cam
• CPC Class Codes: Y10T 403/7086 Wedge pin

Abstract

A locking assembly for retaining a wear member to excavating equipment has a locking element that is received into an opening in the assembly and is movable about a pivot axis in the opening between a hold position and a release position. The locking element has an outer edge that is generally opposite the pivot axis that opposes a base surface of the opening when the locking element is in the hold position. The outer edge is configured to pull away from the base surface when the locking element is rotated from the hold position toward the release position.

Claims

1. A locking assembly for excavating equipment comprising:

a base having an opening and a base surface within the opening; and

a locking element received into the opening and including a pivot member defining a pivot axis about which the locking element rotates between a hold position and a release position, and an outer edge generally opposite the pivot member that opposes the base surface when the locking element is in the hold position, the outer edge being defined relative to the pivot axis such that the outer edge pulls away from the base surface to create a gap along the entire base surface between the outer edge and the base surface when the locking element is rotated from the hold position toward the release position.

2. A locking assembly in accordance with claim 1 wherein the base is a lock body for securing a wear member to the excavating equipment, and the locking element is a latch that retains the lock body in place in the hold position and permits removal of the lock body in the release position.

3. A locking assembly in accordance with claim 2 wherein the base includes a pivot shaft, and the pivot member is a hole in which the pivot shaft is received.

4. A locking assembly in accordance with claim 2 wherein the locking element further includes a finger for engaging a stop in the hold position to retain the lock body in place.

5. A locking assembly in accordance with claim 2 wherein the locking element further includes a keeper for retaining the locking element in the hold position.

6. A Locking assembly in accordance with claim 5 wherein the keeper includes a contact member for engaging a stop and a resilient member for urging the contact member to project outward.

7. A locking assembly in accordance with claim 6 wherein the locking element includes a cavity and the keeper includes an access opening generally aligned with the cavity, the cavity and the access opening receiving a tool for moving the contact member of the keeper to a retracted position against the urging of the resilient member and moving the locking element from the hold position to the release position with a single insertion of the tool into the locking element.

8. A locking assembly in accordance with claim 1 wherein the base is a component of a wear assembly adapted to secure a wear member to the excavating equipment, and the locking element is a lock that releasably retains the wear member to the base.

9. A locking assembly in accordance with claim 8 wherein the pivot member is at least one laterally extending pivot shaft.

10. A locking assembly in accordance with claim 8 wherein the locking element further includes a keeper for retaining the locking element in the hold position.

11. A locking assembly in accordance with claim 10 wherein the keeper includes a contact member for engaging a stop and a resilient member for urging the contact member to project outward.

12. A locking assembly in accordance with claim 11 wherein the locking element includes a cavity and the keeper includes an access opening generally aligned with the cavity, the cavity and the access opening receiving a tool for moving the keeper to a retracted position against the urging of the resilient member and moving the locking element from the hold position to the release position with a single insertion of the tool into the locking element.

13. A locking assembly in accordance with claim 8 wherein the locking element includes front and rear bearing surfaces that generally diverge from each other as they extend generally toward the outer edge.

14. A locking assembly in accordance with claim 8 wherein the locking element includes front and rear walls, and the front wall includes a shoulder adapted to contact an exterior surface of the base forward of the opening to stabilize the locking element.

15. A locking assembly for excavating equipment comprising:

a base having an opening defined by a base surface and at least one side surface; and

a locking element received into the opening, the locking element including a pivot member defining a pivot axis about which the locking element rotates in the opening between a hold position and a release position, an outer edge generally opposite the pivot member that opposes the base surface when the locking element is in the hold position, and a pair of outer walls extending generally transverse to the pivot axis, at least one of the outer walls opposing the at least one side surface of the base when the locking element is in the hold position, and at least one of the outer edge and one of the outer walls being configured to pull away from the opposing one of the base surface and side surface of the base to create a gap along at least one of (i) the entire base surface between the outer edge and the base surface and (ii) the entire side surface between said at least one of the outer walls and said at least one side surface when the locking element is moved from the hold position toward the release position.

16. A locking assembly in accordance with claim 15 wherein the outer edge and the outer wall are each configured to pull away from the opposing one of the base surface and side surface of the base when the locking element is rotated from the hold position toward the release position.

17. A locking assembly in accordance with claim 15 wherein the two outer walls each oppose a side surface of the opening, and are each configured to pull away from the opposing side surface when the locking element is moved from the hold position toward the release position.

18. A locking assembly in accordance with claim 15 wherein the base is a lock body for securing a wear member to the excavating equipment, and the locking element is a latch that retains the lock body in place in the hold position and permits removal of the lock body in the release position.

19. A locking assembly in accordance with claim 15 wherein the base is a component of a wear assembly adapted to secure a wear member to the excavating equipment, and the locking element is a lock that releasably retains the wear member to the base.

20. A locking element for a wear assembly for excavating equipment, the locking element comprising a body, a pivot member defining a pivot axis about which the body rotates between a hold position and a release position, and an outer edge along the body adapted to set against a complementary base surface, the outer edge generally being opposite the pivot member and having a convex curve defined by a radius of curvature which has an origination point that is offset from the pivot axis such that when the locking element rotates about the pivot member from the hold position toward the release position the outer edge pulls away from the base surface to create a gap along the entire base surface between the outer edge and the base surface.

21. A locking element in accordance with claim 20 wherein the locking element is a latch that retains a lock in a wear assembly in the hold position and permits removal of the lock from the wear assembly in the release position.

22. A locking element in accordance with claim 20 wherein the locking element is a lock that retains a wear member to the base.