US 12,623,293 B2 · Tool holder having a cylindrical fixation bore extending rearwardly from a front fixation surface and a fastening bore intersecting the front fixation surface

Abstract

A tool holder has a holder body, a first clamping member, and a first fastening member. The holder body includes a fixation portion and a mounting portion located rearward of the fixation portion. The fixation portion has a front fixation surface facing in a forward direction, a cylindrical fixation bore opening out to the front fixation surface and extending rearwardly therefrom, and a longitudinally extending primary slot connecting the fixation bore to a fixation envelope surface. The first clamping member occupies a first clamping bore and traverses the primary slot. The first fastening member occupies a first fastening bore which intersects the first clamping bore and opens out to the front fixation surface. The fixation bore has a fixation bore first primary diameter which decreases and increases when the first fastening member is rotated in first fastening and first unfastening directions about the first fastening member axis, respectively.

A tool holder (20) having a longitudinal axis (AL) defining a forward direction (DF) and a rear direction (DR) opposite to the forward direction (DF), the tool holder (20) comprising:

a holder body (22),
a first clamping member (24),
a first fastening member (26),
the holder body (22) having a fixation portion (28) and a mounting portion (30) located rearward of the fixation portion (28),
the fixation portion (28) having a front fixation surface (32) facing in the forward direction (DF) and defining a frontmost surface of the fixation portion (28), a cylindrical fixation bore (34) intersecting the front fixation surface (32) and extending rearwardly therefrom along the longitudinal axis (AL), a fixation envelope surface (36) extending rearwardly from the front fixation surface (32), and a longitudinally extending primary slot (38) connecting the fixation bore (34) to the fixation envelope surface (36) and intersecting the front fixation surface (32),
the first clamping member (24) having a first clamping shaft (44) extending along a first clamping shaft axis (ACS1), the first clamping shaft (44) occupying a first clamping bore (46) in the fixation portion (28) and traversing the primary slot (38), the first clamping bore (46) being non-threaded and passing through the fixation envelope surface (36) and extending on both sides of the primary slot (38),
the first fastening member (26) extending along a first fastening member axis (AFM1) and occupying a first fastening bore (48) in the fixation portion (28), the first fastening bore (48) intersecting the first clamping bore (46), extending along the longitudinal axis (AL), and opening out to the front fixation surface (32), the first fastening bore (48) being threaded, and
the fixation portion (28) further comprising a resiliently displaceable fixation jaw (40) and a static base jaw (42) spaced apart by the primary slot,
wherein in a cross-section taken in a first fixation plane (PF1) perpendicular to the longitudinal axis (AL) and intersecting the primary slot (38), the fixation bore (34) has a fixation bore first primary diameter (DFB1′) measured parallel to the first clamping shaft axis (ACS1), and
wherein:
rotation of the first fastening member (26) in a first fastening direction (FD1) about the first fastening member axis (AFM1) causes the first fastening member (26) to operatively engage a first abutment surface (52) of the first clamping shaft (44) and the fixation bore first primary diameter (DFB1′) to decrease,
subsequent rotation of the first fastening member (26) in a first unfastening direction (UD1) opposite to the first fastening direction (FD1) about the first fastening member axis (AFM1) causes the first fastening member (26) to operatively disengage from the first abutment surface (52) of the first clamping shaft (44) and the fixation bore first primary diameter (DFB1′) to increase,
the fixation jaw (40) is spaced apart from the mounting portion (30) by a secondary slot (64) transverse to the primary slot (38),
the base jaw (42) merges with the mounting portion (30), and
the secondary slot (64) communicates with the primary slot (38).

12 more elements

Facts

Application

18/302,748Filed 18 Apr 2023 · us provisional application

Priority

16 May 2022

Published

US 2023/0364687 A116 Nov 2023

Granted

12 May 2026

Term ends

Not estimatedThe source records don’t support an estimate.

Classification10 codes

B23B 29/04
Holders for non-rotary cutting tools ; Boring bars or boring heads; Accessories for tool holders: tool holders for a single cutting tool
B23B 31/201
Longitudinally-split sleeves, e.g. collet chucks: characterized by features relating primarily to remote control of the gripping means
B23B 2231/04
Details of chucks, toolholder shanks or tool shanks: adapters
B23B 2260/124
Details of constructional elements: screws

Tool holder having a cylindrical fixation bore extending rearwardly from a front fixation surface and a fastening bore intersecting the front fixation surface

Life of this patent

Tool holder having a cylindrical fixation bore extending rearwardly from a front fixation surface and a fastening bore intersecting the front fixation surface

Life of this patent

Abstract

Claims22