Clamping assembly, a toolholder assembly comprising a clamping assembly and a toolholder, and a method of changing a toolholder in a toolholder assembly

Patent metadata

Field	Value
Publication number	US-2021069797-A1
Application number	US-201916567327-A
Country	US
Kind code	A1
Filing date	Sep 11, 2019
Priority date	Sep 11, 2019
Publication date	Mar 11, 2021
Grant date	—

Abstract

A clamping assembly includes a base member having an internal bore, a lock rod within the internal bore of the base member and moveable in a forward direction and rearward direction between an unlocked position and a locked position, a crank wheel having an axis of rotation, and a linkage coupled to the lock rod and coupled to the crank wheel at a position radially offset from the axis of rotation of the crank wheel.

First claim

What is claimed is:

1 . A clamping assembly comprising:
a base member having an internal bore; a lock rod within the internal bore of the base member and moveable between an unlocked position and a locked position; a crank wheel having an axis of rotation; and a linkage coupled to the lock rod and coupled to the crank wheel at a position radially offset from the axis of rotation of the crank wheel.

2 . The clamping assembly of claim 1 , wherein the linkage is rotationally coupled to the lock rod by a pin joint.

3 . The clamping assembly of claim 2 , wherein the pin joint comprises a pin rotationally coupled within a bearing within one of the linkage and the lock rod.

4 . The clamping assembly of claim 3 , wherein the bearing is a blind hole.

5 . The clamping assembly of claim 3 , wherein the bearing is a through hole.

6 . The clamping assembly of claim 3 , wherein the pin is rotationally coupled within a bearing within the other of the linkage and the lock rod.

7 . The clamping assembly of claim 3 , wherein the pin is fixedly coupled to the other of the linkage and the lock rod.

8 . The clamping assembly of claim 1 , wherein the linkage is rotationally coupled to the crank wheel by a pin joint.

9 . The clamping assembly of claim 8 , wherein the pin joint comprises a pin rotationally coupled within a bearing within one of the linkage and the crank wheel.

10 . The clamping assembly of claim 9 , wherein the bearing is a blind hole.

11 . The clamping assembly of claim 9 , wherein the bearing is a through hole.

12 . The clamping assembly of claim 9 , wherein the pin is rotationally coupled within a bearing within the other of the linkage and the crank wheel.

13 . The clamping assembly of claim 9 , wherein the pin is fixedly coupled to the other of the linkage and the crank wheel.

14 . The clamping assembly of claim 1 , wherein the base member includes a canister positioned within the internal bore of the base member, wherein the lock rod is positioned within a canister bore of the canister.

15 . A toolholder assembly comprising:
the clamping assembly of claim 1 ; and a toolholder having a shank configured to be received within the internal bore of the base member.

16 . The toolholder assembly of claim 15 , wherein the toolholder comprises a cutting insert.

17 . A method of changing a toolholder in the toolholder assembly of claim 15 , the method comprising:
rotating the crank wheel in a first direction to unclamp a first toolholder from the clamping assembly; removing the first toolholder from the clamping assembly; inserting a second toolholder into the clamping assembly; and rotating the crank wheel in a second direction to clamp the second toolholder into the clamping assembly.

Assignees

• Kennametal Inc

Inventors

• Semnisky Logan M
• Bookheimer Alan J

Classifications

• B23B31/263

  by means of balls · CPC title

• B23B29/046

  with an intermediary toolholder · CPC title

• B23B2231/46

  Pins · CPC title

• B23B31/1071 Primary

  Retention by balls (balls acting as jaws B23B31/22) · CPC title

• B23Q1/00

  Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members (B23Q37/00 takes precedence {; positioning supports for measuring arrangements G01B5/0004; motorised alignment for optical elements G02B7/005; handling of mask or wafer G03F7/70691; adjusting or compensating devices for optical apparatuses G12B5/00; piezoelectric or electrostrictive positioners H10N30/20}) · CPC title