Collet

Patent metadata

Field	Value
Publication number	US-12533733-B2
Application number	US-202217852809-A
Country	US
Kind code	B2
Filing date	Jun 29, 2022
Priority date	Jun 30, 2021
Publication date	Jan 27, 2026
Grant date	Jan 27, 2026

Abstract

A chuck for use with a rotary power tool having an output spindle. The chuck includes a base and an inner sleeve threadedly coupled to the base. The inner sleeve has a central aperture. A collet is disposed within the central aperture of the inner sleeve and configured to be engaged by a portion of the inner sleeve to be tightened or untightened. The chuck further includes an outer sleeve surrounding the inner sleeve, and a detent member disposed between the inner sleeve and the outer sleeve. The detent member is coupled for co-rotation with the outer sleeve and configured to selectively transmit torque from the outer sleeve to the inner sleeve. When the collet is tightened, rotation of the outer sleeve causes axial displacement of the detent member relative to the inner sleeve as the outer sleeve and the detent member rotate relative to the inner sleeve.

First claim

What is claimed is:

1 . A chuck for use with a rotary power tool having an output spindle, the chuck comprising:
a base configured to be coupled to the output spindle; an inner sleeve coupled to the base, the inner sleeve having a central aperture; a collet disposed within the central aperture of the inner sleeve and configured to be engaged by a portion of the inner sleeve to be tightened or untightened; a detent member configured to transmit torque to the inner sleeve to tighten or untighten the collet, the detent member axially displaceable relative to the inner sleeve in response to relative rotation between the detent member and the inner sleeve to create tactile feedback; and an outer sleeve disposed radially outside the inner sleeve, the outer sleeve at least partially rotationally fixed to the detent member such that rotation of the outer sleeve transmits torque to the detent member causing rotation of the detent member, wherein the detent member transmits torque from the outer sleeve to the inner sleeve to tighten the collet, and wherein, when the collet is tightened, rotation of the outer sleeve results in rotation of the detent member relative to the inner sleeve, thereby axially displacing the detent member away from the inner sleeve then towards the inner sleeve to create the tactile feedback.

2 . The chuck of claim 1 , further comprising a spring configured to bias the detent member towards the inner sleeve.

3 . The chuck of claim 2 , wherein, after the detent member creates the tactile feedback, rotation of the outer sleeve results in rotation of the detent member and the inner sleeve to further tighten the collet.

4 . The chuck of claim 2 , wherein the detent member includes a plurality of teeth, and wherein the inner sleeve includes a plurality of teeth engageable with the plurality of teeth of the detent member.

5 . The chuck of claim 4 , wherein engagement of the teeth on the detent member and the inner sleeve, respectively, allows the transmission of torque from the detent member to the inner sleeve.

6 . The chuck of claim 5 , wherein, when the collet is tightened, the teeth of the inner sleeve axially displace the detent member relative to the inner sleeve.

7 . The chuck of claim 1 , wherein the outer sleeve is rotatable in a first direction to tighten the collet, wherein the outer sleeve is rotatable in a second direction opposite the first direction to untighten the collet, and wherein, when the outer sleeve and the inner sleeve are rotated in unison in the second direction, the detent member is not axially displaceable relative to the inner sleeve.

8 . A chuck for use with a rotary power tool having an output spindle, the chuck
comprising:
a base;
an inner sleeve threadedly coupled to the base, the inner sleeve having a central aperture;
a collet disposed within the central aperture of the inner sleeve and configured to be engaged by a portion of the inner sleeve to be tightened or untightened;
an outer sleeve surrounding the inner sleeve; and
a detent member disposed between the inner sleeve and the outer sleeve, the detent member coupled for co-rotation with the outer sleeve and configured to selectively transmit torque from the outer sleeve to the inner sleeve,
a spring configured to bias the detent member into engagement with the inner sleeve,
wherein, when the collet is tightened, rotation of the outer sleeve causes axial displacement of the detent member relative to the inner sleeve as the outer sleeve and the detent member rotate relative to the inner sleeve.

9 . The chuck of claim 8 , wherein the detent member includes a plurality of teeth, wherein the inner sleeve includes a plurality of teeth, and wherein the spring biases the detent member toward the inner sleeve such the plurality of teeth of the detent member engage with the plurality of teeth of the inner sleeve.

10 . The chuck of claim 8 , wherein, when the collet is tightened, rotation of the outer sleeve causes axial displacement of the detent member against the biasing force of the spring, wherein further rotation of the outer sleeve causes the detent member to re-engage the inner sleeve due to the biasing force of the spring, and wherein re-engagement of the detent member and the inner sleeve causes a tactile feedback for a user.

11 . The chuck of claim 10 , wherein, after the detent member creates the tactile feedback, rotation of the outer sleeve results in rotation of the detent member and the inner sleeve to further tighten the collet.

12 . The chuck of claim 8 , wherein the detent member is rotationally fixed relative to the outer sleeve and axially movable relative to the outer sleeve.

13 . The chuck of claim 8 , wherein rotation of the outer sleeve imparts a torque on the inner sleeve through the detent member, wherein the detent member is configured to transmit a tightening torque to the inner sleeve when the outer sleeve is rotated in a tightening direction, wherein the detent member is configured to transmit a loosening torque when the outer sleeve is rotated in a loosening direction, and wherein the tightening torque is less than the loosening torque.

14 . The chuck of claim 13 , wherein, when the outer sleeve and the inner sleeve are rotated in unison in the loosening direction, the detent member does not displace relative to the inner sleeve.

Assignees

• Techtronic Cordless Gp

Inventors

• Loftis Jonathan
• Mok Kwok Ting
• Hu long long
• Liao Jia Ming

Classifications

• Y10T279/17299

  Threaded cam sleeve · CPC title

• B23B2231/14

  Chucks with clamping force limitation means · CPC title

• B23B31/201

  Characterized by features relating primarily to remote control of the gripping means · CPC title

• B23B31/2012 Primary

  Threaded cam actuator · CPC title

• B23B2260/07

  Gears · CPC title