Retainer systems for ground engaging tools

• US 10,047,503 B2
• Filed: 10/11/2016
• Issued: 08/14/2018
• Est. Priority Date: 05/31/2013
• Status: Active Grant

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Lahood, James R., Jeske, Clifford O.
• Primary Examiner(s): Troutman, Matthew D.
• Application Number:
  US15/290,694
• Publication Number:
  US 20170030055A1
• Time in Patent Office: 672 Days
• Field of Search: 37446, 37452-460, 1727011, 1727013, 172772, 1727725, 299109, 299111, 299113
• CPC Class Codes: E02F 3/40 Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets devices to connect tools to arms or booms E02F3/3604; teeth therefor E02F9/28
• CPC Class Codes: E02F 9/2825 using adapters
• CPC Class Codes: E02F 9/2833 Retaining means, e.g. pins
• CPC Class Codes: E02F 9/2841 resilient
• CPC Class Codes: E02F 9/2891 Tools for assembling or disassembling

Abstract

Disclosed are various exemplary embodiments of a retainer system for a ground engaging tool. In one exemplary embodiment, the retainer system may include a lock having a lock rotation axis and including an outer surface extending about the lock rotation axis. The retainer system may also include a retainer bushing including an inner surface extending about the lock rotation axis, where the inner surface is configured to rotatably receive the outer surface of the lock. The outer surface of the lock and the inner surface of the retainer bushing may be aligned substantially parallel to the lock rotation axis.

Claims

1. A retainer system for a ground engaging tool, comprising:

a lock having a lock rotation axis and including an outer surface extending about the lock rotation axis; and

a retainer bushing including an inner surface extending about the lock rotation axis, the inner surface being configured to rotatably receive the outer surface of the lock,

wherein the outer surface of the lock and the inner surface of the retainer bushing are aligned substantially parallel to the lock rotation axis,

wherein the lock is configured to be inserted into the retainer bushing in the direction parallel to the lock rotation axis,

wherein the retainer bushing includes a detent projection extending from the inner surface, the lock includes a detent recess configured to engage the detent projection, and the detent recess has a length greater than that required to receive the detent projection, and

wherein the detent recess extends substantially the entire length of the lock in a direction generally parallel to the lock rotation axis.

2. The retainer system of claim 1, wherein a cross-sectional area of the detent recess along a plane substantially perpendicular to the lock rotation axis is greater than that of the detent projection, so as to create a gap between the detent projection and the detent recess.

3. A lock for a ground engaging tool, comprising:

a head portion; and

a skirt portion extending from the head portion and defining a lock slot for receiving a support member to be locked with the ground engaging tool, the skirt portion including an outer surface extending about a lock rotation axis to rotatably engage a retainer bushing, a detent recess formed on the outer surface and configured to engage a corresponding detent of the retainer bushing, wherein the detent recess extends substantially the entire length of the skirt in a direction generally parallel to the lock rotation axis, and

wherein the outer surface extended about the lock rotation axis is aligned in a direction substantially parallel to the lock rotation axis.

4. The lock of claim 3, wherein the head portion includes a tool interface configured to receive a tool for applying torque about the lock rotation axis.