Tool holder and base mounting assembly

Patent metadata

Field	Value
Publication number	US-10030515-B2
Application number	US-201514620841-A
Country	US
Kind code	B2
Filing date	Feb 12, 2015
Priority date	Feb 12, 2015
Publication date	Jul 24, 2018
Grant date	Jul 24, 2018

Abstract

A 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 includes: a base having a bottom portion for attachment to the surface of the rotatable driving member and a front portion that defines a bore; and a tool holder configured for mounting to the base. The tool holder includes: a leading head region having a forward face that defines an aperture for receiving the cutting tool; a trailing shank region with a central longitudinal axis and having an axial forward end and an axial rearward end; and a mediate region intermediate of and contiguous with the leading head region and the trailing shank region. The trailing shank region includes an anti-rotation portion and a mounting retention portion.

First claim

What is claimed is:

1. A 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 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 bore; and
a tool holder configured for mounting to the base, the tool holder comprising:
a leading head region having a forward face that defines an aperture for receiving the cutting tool;
a trailing shank region with a central longitudinal axis and having an axial forward end and an axial rearward end; and
a mediate region intermediate of and contiguous with the leading head region and the trailing shank region;
wherein the trailing shank region comprises an anti-rotation portion and a mounting retention portion;
the mounting retention portion including at least one press fit portion;
wherein the anti-rotation portion and the mounting retention portion are configured as a unitary member, and are disposed fully and continuously about the central longitudinal axis of the trailing shank region when viewed in a plane that is transverse to, and intersects, the central longitudinal axis of the trailing shank region;
wherein the anti-rotation portion comprises at least two sides which are not rounded; and
wherein the anti-rotation portion is adjacent the axial rearward end of the trailing shank region;

wherein a portion of the bore of the base is configured to receive the anti-rotation portion; and
the at least one press fit portion of the mounting retention portion comprises a rearward surface which does not contact any surface of the bore when the anti-rotation portion is received in the bore.

2. The mounting assembly of claim 1 , wherein the at least two sides which are not rounded comprise at least one planar side.

3. The mounting assembly of claim 1 , wherein at least a portion of the anti-rotation portion tapers inwardly toward the axial rearward end of the trailing shank region.

4. The mounting assembly of claim 1 , wherein a portion of the bore of the base is configured to receive the anti-rotation portion of the trailing shank region.

5. The mounting assembly of claim 1 , wherein the at least one press fit portion includes a tapered press fit portion that tapers axially rearward toward the anti-rotation portion.

6. The mounting assembly of claim 5 , wherein the at least one press fit portion further includes a generally cylindrical press fit portion axially rearward of the tapered press fit portion and adjacent the anti-rotation portion.

7. The mounting assembly of claim 1 , wherein the bore of the base is configured for receiving at least a portion of the trailing shank region of the tool holder and an axial rearward end of the bore is configured to have a shape complimentary to the anti-rotation portion of the trailing shank region.

8. A tool holder of a mounting assembly adapted for attachment to a surface of a rotatable driving member of a cutting tool machine, the tool holder adapted for receiving a cutting tool, the tool holder comprising:
a leading head region having a forward face that defines an aperture for receiving the cutting tool;
a trailing shank region with a central longitudinal axis and having an axial forward end and an axial rearward end; and
a mediate region intermediate of and contiguous with the leading head region and the trailing shank region;
wherein the trailing shank region comprises an anti-rotation portion and a mounting retention portion;
wherein the anti-rotation portion and the mounting retention portion are configured as a unitary member, and are disposed fully and continuously about the central longitudinal axis of the trailing shank region when viewed in a plane that is transverse to, and intersects, the central longitudinal axis of the trailing shank region;
wherein the anti-rotation portion comprises at least two sides which are not rounded; and
wherein the anti-rotation portion is adjacent the axial rearward end of the trailing shank region; and
a chamfer disposed at the axial rearward end of the trailing shank region;
wherein the chamfer assists in alignment of the tool holder with respect to a bore, when mounting the tool holder in a bore.

9. The tool holder of claim 8 , wherein the at least two sides which are not rounded comprise at least one planar side.

10. The tool holder of claim 8 , wherein at least a portion of the anti-rotation portion tapers inwardly toward the axial rearward end of the trailing shank region.

11. The tool holder of claim 8 , wherein the mounting retention portion includes a tapered press fit portion that tapers axially rearward toward the anti-rotation portion.

12. The tool holder of claim 8 , wherein the mounting retention portion further includes a generally cylindrical press fit portion axially rearward of the tapered press fit portion and adjacent the anti-rotation portion.

13. A tool holder of a mounting assembly adapted for attachment to a surface of a rotatable driving member of a cutting tool machine, the tool holder adapted for receiving a cutting tool, the tool holder comprising:
a head having a forward face that defines an aperture for receiving the cutting tool; and
a shank with a central longitudinal axis and having an axial forward end and an axial rearward end, the shank comprising:
an anti-rotation portion; and
a mounting retention portion;
wherein the anti-rotation portion and the mounting retention portion are configured as a unitary member, and are disposed fully and continuously about the central longitudinal axis of the trailing shank region when viewed in a plane that is transverse to, and intersects, the central longitudinal axis of the trailing shank region;
wherein the mounting retention portion includes a tapered press fit portion that tapers axially rearward and a generally cylindrical press fit portion;
wherein the anti-rotation portion comprises at least two sides which are not rounded;
wherein the anti-rotation portion is adjacent the axial rearward end of the shank; and
wherein the tapered press fit portion, the generally cylindrical press fit portion and the anti-rotation portion each have an axial length, defined with respect to the central longitudinal axis;
the axial length of the anti-rotation portion being greater than the axial length of the tapered press fit portion and of the generally cylindrical press fit portion.

14. The mounting assembly of claim 2 , wherein the at least one planar side comprises two planar sides, which are interconnected when viewed in a plane that is transverse to, and intersects, the central longitudinal axis of the trailing shank region.

15. The mounting assembly of claim 14 , wherein:
the anti-rotation portion comprises two opposing planar sides and two opposing rounded ends;
the two planar sides and the two rounded ends combining to fully and continuously surround the central longitudinal axis of the trailing shank region when viewed in a plane that is transverse to, and intersects, the central longitudinal axis of the trailing shank region.

16. The mounting assembly of claim 2 , wherein the at least one planar side comprises a planar side defined by a flat, planar surface area.

17. The mounting assembly of claim 7 , wherein the anti-rotation portion engages with the complimentary shape of the axial rearward end of the bore solely via surface-to-surface engagement.

18. The mounting assembly of claim 6 , wherein:
the generally cylindrical press fit

Assignees

• Kennametal Inc

Inventors

• Weber Luke A
• Helsel Eric P
• Lavely Brian K
• Lamantia Timothy A
• Keller Donald E

Classifications

• E21C35/191

  for fixing holders · CPC title

• E21C35/19 Primary

  Means for fixing picks or holders · CPC title

• E21C2035/191

  Fixed Constructions · mapped topic