Lock for securing wear parts to earth-working equipment

• US 7,536,811 B2
• Filed: 06/13/2007
• Issued: 05/26/2009
• Est. Priority Date: 06/16/2006
• Status: Active Grant

• Current Assignee: ESCO Group LLC (WEIR Group PLC)
• Original Assignee: ESCO Corporation (WEIR Group PLC)
• Inventors: McClanahan, Robert
• Primary Examiner(s): Beach; Thomas A
• Application Number:
  US11/818,483
• Publication Number:
  US 20070293074A1
• Time in Patent Office: 713 Days
• Field of Search: 37350-360, 172/772, 172/772.5, 403/319, 403/320
• US Class Current: 37/455
• CPC Class Codes: E02F 9/2833 Retaining means, e.g. pins

Abstract

A lock for securing a wear part to earth-working equipment that is foldable between a retaining position to hold the wear part to the equipment and a release position that permits removal of the lock and release of the wear part from the equipment. The lock includes a retainer for releasably holding the lock in the retaining position. The retainer may comprise a threaded wedge received into a complementary threaded passage.

Claims

1. A lock for securing a wear member to earth-working equipment comprising:

a plurality of bodies interconnected for pivotal movement about a pivot axis between a retaining position where the bodies are aligned in a generally linear orientation and the lock holds the wear member to the earth-working equipment and a release position where the bodies are pivoted to a relative angular orientation and the lock can be removed to permit removal of the wear member from the earth-working equipment, wherein the lock has a length in a direction transverse to the pivot axis that is greater in the retaining position than in release position, and wherein each body provides generally the same resistance in preventing removal of the wear member from the earth-working equipment; and

a retainer to prevent the bodies from moving about the pivot axis out of the retaining position, wherein the retainer is a threaded member that engages each of the bodies in the retaining position and releases at least one of said bodies in the release position.

2. A lock in accordance with claim 1 wherein the retainer is threaded into a passage formed along a seam between the bodies in the retaining position.

3. A lock in accordance with claim 1 wherein the retainer is a threaded wedge.

4. A lock in accordance with claim 1 further including at least one grip for a tool to engage at least one of the bodies to move the lock from the retaining position to the release position.

5. A lock in accordance with claim 4 further including a recess defining a fulcrum for the tool.

6. A lock in accordance with claim 1 wherein each of the bodies has a generally L-shaped configuration.

7. A lock for securing a wear member to earth-working equipment comprising:

a plurality of bodies interconnected for pivotal movement about a pivot axis between a retaining position where the bodies are aligned in a generally linear orientation and the lock holds the wear member to the earth-working equipment and a release position where the bodies are pivoted to a relative annular orientation and the lock can be removed to permit removal of the wear member from the earth-working equipment, wherein the lock has a length in a direction transverse to the pivot axis that is greater in the retaining position than in release position, and wherein each body provides generally the same resistance in preventing removal of the wear member from the earth-working equipment,

a retainer to prevent the bodies from moving about the pivot axis out of the retaining position, wherein the retainer is inserted into a passage formed along a seam between the bodies in the retaining position, and wherein the retainer is inserted into the passage in a direction generally transverse to the pivot axis.

8. A lock in accordance with claim 7 wherein the retainer is a threaded member that engages each of the bodies in the retaining position and releases at least one of said bodies in the release position.

9. A lock for securing a wear member to earth-working equipment comprising a plurality of bodies interconnected for pivotal movement about a pivot axis between a retaining position where the bodies are aligned in a generally linear orientation and the lock holds the wear member to the earth-working equipment and a release position where the bodies are pivoted to a relative angular orientation and the lock can be removed to permit removal of the wear member from the earth-working equipment, wherein the lock has a length in a direction transverse to the pivot axis that is greater in the retaining position than in release position, and wherein each body provides generally the same resistance in preventing removal of the wear member from the earth-working equipment, wherein one of said bodies defines a post and the other of said bodies defines a hole for receiving the post to define the pivot axis.

10. A lock in accordance with claim 9 further including a retainer to prevent the bodies from moving about the pivot axis out of the retaining position.

11. A lock in accordance with claim 10 wherein the retainer is inserted into a passage formed along a seam between the bodies in the retaining position.

12. A lock in accordance with claim 11 wherein the retainer is inserted into the passage in a direction generally parallel to the pivot axis.

13. A lock for securing a wear member to earth-working equipment comprising an elongate foldable element having opposite ends that can be folded between a first position having a first length and a second position having a second length that is shorter than the first length for insertion of the lock into the wear member, wherein the ends are drawn forward in the direction of insertion in the second position, and a retainer for selectively preventing folding of the element in the first position to prevent release of the lock from the wear member, wherein the retainer is a threaded member and the foldable element includes a threaded passage for receiving the retainer.

14. A lock in accordance with claim 13 wherein the passage and the retainer each has a tapered shape.

15. A lock in accordance with claim 13 wherein the foldable element includes at least one grip for connection by a tool to engage and fold the foldable element from the first position to the second position.

16. A lock for securing a wear member to earth-working equipment comprising:

two components that are interconnected to define opposite ends of a lock body, the components being movable between a first position where the lock has a first length and is retained in an opening to hold the wear member to the earth-working equipment and a second position where the components are pivoted out of their first position and define a second length shorter than the first length to permit insertion and removal of the lock into and out of the wear member for the earth-working equipment, wherein the components are pivotally movable about a pivot axis such that the lock defines a longer length in the first position as compared to the second position, and wherein the components define a tapered, threaded passage extending generally transverse to the pivot axis; and

a retainer receivable in the passage for releasably engaging the two components in the first position to prevent movement of the components from the first position to the second position.

17. A lock in accordance with claim 16 wherein the components define a tapered, threaded passage extending generally parallel to the pivot axis.

18. A lock in accordance with claim 16 wherein at least one of the components defines a tapered, threaded passage for receiving the threaded wedge.