Cutting tool mounting assembly with elastomeric coated bushing

Patent metadata

Field	Value
Publication number	US-9422812-B2
Application number	US-201414513547-A
Country	US
Kind code	B2
Filing date	Oct 14, 2014
Priority date	Oct 14, 2014
Publication date	Aug 23, 2016
Grant date	Aug 23, 2016

Abstract

A cutting tool mounting assembly adapted for receiving a cutting tool includes a base having a bottom portion and a front portion that defines a receptacle having an inner wall and a bushing configured for receipt in the receptacle of the base. The bushing includes: a forward face defining an aperture for receiving the cutting tool; a shoulder generally opposite the forward face, the shoulder configured for cooperating with the front portion of the base; and a shank portion extending rearward from the shoulder, the shank portion having an outer surface configured for cooperating with the inner wall of the receptacle. A first elastomeric layer is positioned between the shoulder of the bushing and the front portion of the base and a second elastomeric layer is positioned between the outer surface of the shank portion and the inner wall of the receptacle.

First claim

What is claimed is:

1. A cutting tool mounting assembly adapted for attachment to a surface of a rotatable driving member of a cutting tool machine and adapted for receiving a cutting tool, the cutting tool mounting assembly comprising:
a base having a bottom portion for attachment to the surface of the rotatable driving member and a front portion that defines a receptacle having an inner wall;
a bushing configured for receipt in the receptacle of the base, the bushing comprising:
a forward face defining an aperture for receiving the cutting tool;
a shoulder generally opposite the forward face, the shoulder configured for cooperating with the front portion of the base; and
a shank portion extending rearward from the shoulder, the shank portion having an outer surface configured for cooperating with the inner wall of the receptacle;

a first elastomeric layer positioned between the shoulder of the bushing and the front portion of the base; and
a second elastomeric layer positioned between the outer surface of the shank portion and the inner wall of the receptacle,
wherein the first elastomeric layer is formed on the shoulder of the bushing and the second elastomeric layer is formed on the outer surface of the shank portion and
wherein the first elastomeric layer adjoins the second elastomeric layer to form a continuous elastomeric layer.

2. The cutting tool mounting assembly of claim 1 , wherein the second elastomeric layer has a variable thickness.

3. The cutting tool mounting assembly of claim 1 , wherein an outer surface of the second elastomeric layer is non-linear.

4. The cutting tool mounting assembly of claim 1 , wherein the bushing is press fit into the receptacle of the base.

5. A cutting tool mounting assembly adapted for attachment to a surface of a rotatable driving member of a cutting tool machine and adapted for receiving a cutting tool, the cutting tool mounting assembly comprising:
a base having a bottom portion for attachment to the surface of the rotatable driving member and a front portion that defines a receptacle having an inner wall; and
an elastomeric coated bushing configured for receipt in the receptacle of the base, the elastomeric coated bushing comprising:
a forward face defining an aperture for receiving the cutting tool;
a shoulder generally opposite the forward face, the shoulder configured for cooperating with the front portion of the base; and
a shank portion extending rearward from the shoulder, the shank portion having an outer surface configured for cooperating with the inner wall of the receptacle,
wherein the elastomeric coated bushing includes a first layer of elastomeric material formed on the shoulder of the bushing,
wherein the elastomeric coated bushing includes a second layer of elastomeric material formed on the outer surface of the shank portion, and
wherein the first layer of elastomeric material adjoins the second layer of elastomeric material to form a continuous elastomeric layer.

6. The cutting tool assembly of claim 5 , wherein the second layer of elastomeric material has a variable thickness.

7. The cutting tool assembly of claim 5 , wherein an outer surface of the second layer of elastomeric material is non-linear.

Assignees

• Kennametal Inc

Inventors

• Paros Nicholas J
• Swope Chad A
• Keller Donald E

Classifications

• E21C35/197 Primary

  using sleeves, rings or the like, as main fixing elements · CPC title

• E21C35/18 Primary

  Mining picks; Holders therefor (planing knives E21C27/44) · CPC title

• E21C35/183

  with inserts or layers of wear-resisting material {(drill bits with wear-resistant parts E21B10/46)} · CPC title

• E21C2035/1803

  Fixed Constructions · mapped topic