WEAR ASSEMBLY

• US 20200131743A1
• Filed: 10/31/2019
• Published: 04/30/2020
• Est. Priority Date: 10/31/2018
• Status: Active Grant

• Current Assignee: ESCO Group LLC (WEIR Group PLC)
• Original Assignee: ESCO Group LLC (WEIR Group PLC)
• Inventors: Bingham, Bruce C., Roska, Michael B., Harding, Darrin, Beatley, Mark, Brockman, Cornelius J.
• Granted Patent: US 11,441,296 B2
• Time in Patent Office: Days
• CPC Class Codes: E02F 9/2816 Mountings therefor
• CPC Class Codes: E02F 9/2833 Retaining means, e.g. pins
• CPC Class Codes: E02F 9/2841 resilient
• CPC Class Codes: E02F 9/2883 Wear elements for buckets or implements in general

Abstract

A lock that includes a pin and a collar. At least one of the pin and collar include a circular seal and a recess to store the seal. When the pin and collar are engaged in a locking manner, the surfaces of the pin and collar compress the seal such that a barrier is formed to limit ingress of fine earthen material. The lock assembly may be a component of a wear assembly. The lock assembly may be positioned into aligned holes to capture components of the wear assembly together, e.g. a point to an adapter or an adapter to a base. The recess of the pin may be located adjacent the head of the pin. The recess of collar may be located near the bottom of the collar. The application of both an upper and lower seal can further limit the ingress of fine earthen material.

Claims

1. A lock for securing a wear member to a base for use in an abrasive environment including fines comprising:

a collar securable in the wear member and having a hole defined by an inner surface, the hole including a circumferential first recess;

a pin having a head and a tapered shank projecting from the head, the shank being movably received in the hole and releasably maintained in the collar in a hold position where the lock secures the wear member to the base, the shank having a circumferential second recess adjacent the head;

a circumferential first seal received in the first recess, which is compressed between the shank and the inner surface when the pin is in the hold position; and

a circumferential second seal received in the second recess, which is compressed between the head and the collar when the pin is in the hold position.

2. The lock of claim 1, wherein the shank and the inner surface of the collar each include threads that are engaged and enclosed by the seals when the pin is in the hold position.

3. The lock of claim 2, wherein the collar includes a third recess and a fourth recess, and the shank includes a detent that engages the third recess to releasably secure the pin in the collar in a release position where the wear member can be installed on the base and that engages the fourth recess to releasably secure the pin in the collar in a hold position securing the wear member to the base.

4. The lock of claim 1, wherein the second recess is located near an inner surface of the collar.

5. The lock of claim 1, wherein the shank includes a detent and the collar includes a third recess such that the detent engages into the third recess when the pin is in the collar in a release position where the wear member can be installed on the base.

6. The lock of claim 5, wherein the collar includes a fourth recess such that the detent engages into the fourth recess when the pin is in the collar in a hold position securing the wear member to the base.

7. The lock of claim 1, wherein the collar includes a lug on an outer surface of the collar for securing the collar in the wear member.

8. A lock for securing a wear member to a base for use in an abrasive environment including fines assembly comprising:

a collar securable in the wear member and having a hole defined by an inner surface that includes threads;

a pin having a shank including threads that engage the threads in the collar, so the pin is movably received in the hole and releasably maintained in the collar in a hold position where the lock secures the wear member to the base; and

an inner seal and an outer seal each received between the collar and the pin when the pin is in the hold position, and thereby cooperatively enclosing at least a substantial portion of the engaged threads to limit the ingress of fines into the threads.

9. The lock of claim 8, wherein the collar includes an inner recess and an outer recess, the shank includes a latch releasably engageable with the inner and outer recesses such that the pin is in the hold position when the latch engages the inner recess and in a release position where the wear member can be installed on the base when the latch engages the outer recess.

10. The lock of claim 9, wherein the pin includes a head that compresses the outer seal against the collar when the pin is in the hold position.

11. The lock of claim 10, wherein the shank is tapered and progressively compresses the inner seal as the pin is moved to the hold position.

12. A wear assembly for use in an abrasive environment including fines comprising:

a wear member having an exterior surface, an interior surface including a mounting portion that is securable to a base, and an opening defined by an inner surface extending from the exterior surface to the interior surface, wherein the opening includes threads;

a pin having a shank including threads that engage the threads in the hole, so the pin is movably received in the hole and releasably maintained in the hole in a hold position where the lock secures the wear member to the base; and

an outer seal between the inner surface and the pin generally outside of the engaged threads when the pin is in the hold position to limit the ingress of fines into the threads.

13. A wear assembly of claim 12 including an inner seal between the inner surface and the shank generally inside of the engaged threads when the pin is in the hold position to limit the ingress of fines into the threads.

14. The wear assembly of claim 13, wherein the inner seal is secured in a recess in the inner surface, and the shank is tapered to progressively compress the inner seal as the pin is moved to the hold position.

15. The wear assembly of claim 14 including a collar having a threaded hole and secured in the opening to provide the threads in the opening.

16. The wear assembly of claim 15, wherein the pin includes a head that compresses the outer seal against the collar when the pin is in the hold position.

17. A wear assembly for use in an abrasive environment including fines comprising:

a wear member having an exterior surface, an interior surface including a mounting portion that is securable to a base, and an opening defined by an inner surface extending from the exterior surface to the interior surface;

a collar secured in the opening, the collar having a hole that includes threads and a recess;

a pin having a head and a tapered shank projecting from the head to a leading end opposite the head, the shank including a recess and threads between the recess and the leading end that engage the threads in the hole so the pin is movably received in the hole and releasably maintained in the hole in a hold position where the lock secures the wear member to the base;

an inner seal in the recess in the collar between the inner surface and the shank that is progressively compressed as the pin is moved to the hold position; and

an outer seal in the recess on the shank that is compressed between the head and the collar as the pin is moved to the hold position;

wherein the inner and outer seals at least substantially enclose the engaged threads when the pin is in the hold position to limit the ingress of fines into the threads.

18. The lock of claim 17, wherein the collar includes an inner recess and an outer recess, and the shank includes a detent that engages the outer recess to releasably secure the pin in the collar in a release position where the wear member can be installed on the base and that engages the inner recess to releasably secure the pin in the collar in a hold position securing the wear member to the base.

19. A wear assembly for use in an abrasive environment including fines comprising:

a wear member having

an exterior surface, the exterior surface having a working portion such that the working portion converges towards a front end, the working portion for engaging earthen material;

a back end having a cavity defined by an interior surface including a mounting portion that is securable to a base; and

an opening defined by an inner surface extending from the exterior surface to the interior surface;

a collar secured in the opening, the collar having a hole that includes threads and a recess;

a pin having a head and a tapered shank projecting from the head to a leading end opposite the head, the shank including a recess and threads between the recess and the leading end that engage the threads in the hole so the pin is movably received in the hole and releasably maintained in the hole in a hold position where the lock secures the wear member to the base;

an inner seal in the recess in the collar between the inner surface and the shank that is progressively compressed as the pin is moved to the hold position; and

an outer seal in the recess on the shank that is compressed between the head and the collar as the pin is moved to the hold position;

wherein the inner and outer seals at least substantially enclose the engaged threads when the pin is in the hold position to limit the ingress of fines into the threads.

20. A wear assembly for use in an abrasive environment including fines comprising:

a wear member having

an exterior surface, the exterior surface having a working portion such that the working portion converges towards a front end, the working portion for engaging earthen material;

a back end having a cavity defined by an interior surface including a mounting portion that is securable to a base; and

an opening defined by an inner surface extending from the exterior surface to the interior surface;

a pin having a shank including threads that engage the threads in the hole, so the pin is movably received in the hole and releasably maintained in the hole in a hold position where the lock secures the wear member to the base; and

an outer seal between the inner surface and the pin generally outside of the engaged threads when the pin is in the hold position to limit the ingress of fines into the threads.