Wear member for excavating equipment

• US 7,367,144 B2
• Filed: 01/04/2006
• Issued: 05/06/2008
• Est. Priority Date: 07/06/2001
• Status: Expired due to Term

• Current Assignee: ESCO Group LLC (WEIR Group PLC)
• Original Assignee: ESCO Corporation (WEIR Group PLC)
• Inventors: Carpenter, Christopher M., Jones, Larren F., Graf, David M.
• Primary Examiner(s): Novosad; Christopher J.
• Application Number:
  US11/324,944
• Publication Number:
  US 20060117613A1
• Time in Patent Office: 853 Days
• Field of Search: 374/52, 37455-459, 172/772, 172/772.5
• US Class Current: 37/456
• CPC Class Codes: E02F 9/28 Small metalwork for digging elements, e.g. teeth scraper bits ploughs for agriculture A01B15/00; teeth of harrows A01B23/02
• CPC Class Codes: E02F 9/2825 using adapters
• CPC Class Codes: E02F 9/2833 Retaining means, e.g. pins
• CPC Class Codes: E02F 9/2883 Wear elements for buckets or implements in general
• CPC Class Codes: Y10T 403/595 Lever
• CPC Class Codes: Y10T 403/7064 by wedge or cam

Abstract

A wear assembly provided with a tapered opening and a complementary tapered lock wherein the lock can be pried into and from the opening to thereby eliminate the need for hammering. The lock is formed with a body and a latch that is movable between a hold position where the latch is engageable with a stop in the opening to releaseably retain the lock in the opening and a release position where the latch disengages the stop.

Claims

1. A wear member for use in excavating comprising:

a body having a front end, a rear end, a top wall, a bottom wall, side walls interconnecting the top and bottom walls, and a rearwardly opening socket for receiving a nose which is fixed to excavating equipment, wherein the top and bottom walls converge toward front end, and the socket is defined by interior surfaces of the upper, lower and side walls; and

at least one ear extending from one of the side walls rearward of the body, the ear having a tapered slot with an inlet end for receiving a lock by which the wear member is retained to the nose, wherein the slot tapers away from the inlet end.

2. A wear member in accordance with claim 1 in which the slot includes a front wall surface and a rear wall surface which converge in a direction away from the inlet end.

3. A wear member in accordance with claim 2 in which the front and rear wall surface converge along substantially their entire lengths.

4. A wear member in accordance with claim 2 where the front wall surface is non-linear and the rear wall surface is generally linear.

5. A wear member in accordance with claim 2 in which the slot is defined by the front wall surface, rear wall surface and a side surface that extends between the front and rear wall surfaces, wherein the side surface converges toward a central vertical plane of the socket as the side surface extends away from the inlet end.

6. A wear member in accordance with claim 5 in which the side surface extends away from the central vertical plane of the socket as the side surface extends rearward.

7. A wear member in accordance with claim 1 in which the slot further includes a notch in the side surface adjacent the rear wall surface and the inlet end for receipt of protrusion of the lock.

8. A wear member in accordance with claim 1 wherein the slot tapers in two generally perpendicular directions.

9. A wear member in accordance with claim 1 wherein the slot tapers in three generally perpendicular directions.

10. A wear member in accordance with claim 1 wherein the slot is defined by a front wall surface, an opposing rear wall surface, and a side surface extending between the front and rear wall surfaces, and wherein the side surface converges toward a central vertical plane of the socket as the side surface extends away from the inlet end.

11. A wear member in accordance with claim 10 wherein the side surface converges toward the central vertical plane over substantially the entire length of the side surface.

12. A wear member in accordance with claim 1 wherein the slot is defined by a front wall surface, an opposing rear wall surface, and a side surface extending between the front and rear wall surfaces, and wherein the side surface converges toward a central vertical plane of the socket as the side surface extends toward the font wall surface.

13. A wear member in accordance with claim 12 wherein the side surface converges toward the central vertical plane over substantially the entire distance between the rear wall surface and the front wall surface.

14. A wear member in accordance with claim 1 in which the slot includes a stop for releaseably retaining the lock in the slot.

15. A wear member in accordance with claim 14 in which the stop projects into the slot from the front wall surface.

16. A wear member in accordance with claim 1 in which the slot includes a notch in at least one wall surface.

17. A wear member in accordance with claim 1 wherein the wear member is a point of an excavating tooth.

18. A wear member for use in excavating comprising:

a wear surface;

a support cavity for recieving a support structure secured to excavating equipment; and

an opening by an interior wall having a front wall surface and a rear wall surface, the opening having an inlet end for receving a lock to retain the wear member to the support structure and a stop formed along the front wall surface for releasbly retaining the lock in the opening and the opening norrowing along at least part of the length of the the opening as the opening extends away from the inlet end and the stop.

19. A wear member in accordance with claim 18 wherein the stop is a projection that projects into the opening from the front wall surface.

20. A wear member in accordance with claim 18, wherein the front and rear wall surfaces gradually converge as they extend away from the inlet end.

21. A wear member in accordance with claim 20 in which the opening has a width extending generally transverse to the front and rear wall surfaces, wherein the width gradually narrows as the opening extends away from the inlet end.

22. A wear member in accordance with claim 21 wherein the opening gradually widens as the opening extends from the front wall surface to the rear wall surface.

23. A wear member in accordance with claim 22 further including a rearwardly extending ear, wherein the opening is formed in the ear.

24. A wear member in accordance with claim 18 in which the opening has and a width extending generally transverse to the front and rear wall surfaces, wherein the width gradually narrows as the opening extends away from the inlet end.

25. A wear member in accordance with claim 18 wherein the opening includes a front wall surface and a rear wall surface, and the opening gradually widens as the opening extends from the front wall surface to the rear wall surface.

26. A wear member in accordance with claim 18 which is a point of an excavating tooth, wherein the support cavity is a socket adapted to receive a support structure in the form of a nose of an adapter.

27. A wear member in accordance with claim 18 wherein the rear wall surface is generally linear to engage a complementary rear wall of the lock.

28. A wear member for use in excavating comprising:

a wear surface;

a support cavity adapted to receive a support structure secured to excavating equipment, the support cavity having a rearwardly extending longitudinal axis; and

an opening for receiving a lock to hold the wear member to the support structure, the opening having an open inlet end by which the lock is received, a forward end, a rearward end, a length generally in the direction the lock is inserted into the opening, a thickness generally in the direction of the longitudinal axis of the support cavity, and a width generally perpendicular to the length and the thickness, wherein the opening tapers in both the width and the thickness as the opening extends away from the inlet end.

29. A wear member in accordance with claim 28 wherein the opening widens as the opening extends from the forward end to the rearward end.

30. A wear member in accordance with claim 29 wherein the opening includes a stop to releasably retain the lock in the opening.

31. A wear member in accordance with claim 30 further including a rearwardly extending ear, wherein the ear includes the opening for the lock.

32. A wear member in accordance with claim 28 wherein the thickness and the width each tapers along substantially the entire length of the opening.

33. A wear member for use in excavating comprising:

a wear surface;

a rearwardly opening socket for receiving a nose fixed to excavating equipment, the socket having interior upper, lower and side surfaces, and a rearwardly extending longitudinal axis; and

an opening for receiving a lock, the opening being laterally offset from the longitudinal axis and having an inlet end for receiving a lock in a direction generally transverse to the longitudinal axis to hold the wear member to the nose, the opening tapering in a direction away from the inlet end.

34. A wear member in accordance with claim 33 wherein the opening tapers along two perpendicular axes in a direction away from the inlet end.

35. A wear member in accordance with claim 33 wherein the opening includes a stop for cooperating with a latch on the lock to retain the lock within the opening.

36. A wear member in accordance with claim 33 wherein the opening includes a lateral notch adjacent the inlet end for receiving a protrusion on the lock.

37. A wear member in accordance with claim 33 which further includes a rearwardly extending ear, wherein the opening is defined in the ear and includes a front wall and a rear wall that converge toward each other in a direction away from the inlet end.