Handheld machine tool

Patent metadata

Field	Value
Publication number	US-9566696-B2
Application number	US-201214353244-A
Country	US
Kind code	B2
Filing date	Sep 26, 2012
Priority date	Oct 24, 2011
Publication date	Feb 14, 2017
Grant date	Feb 14, 2017

Abstract

A handheld machine tool having an output shaft on which a tool holding fixture is developed, which has a multi-faced inner receptacle and a multi-faced outer receptacle, the multi-faced inner receptacle to connect to a tool insert, which can be locked using a locking device assigned to the tool holding fixture; the locking device having a locking sleeve which is displaceable for unlocking the tool insert against a spring force applied by an associated spring element in an axial direction facing away from the handheld machine tool, from a locking to an unlocking position, the locking sleeve has an operating element and a holding element connected to each other via a threaded connection, the holding element driven by the associated spring element in the direction of the locking position of the locking sleeve and the operating element enables displacement of the locking sleeve from the locking to the unlocking position.

First claim

What is claimed is:

1. A handheld machine tool, comprising:
an output shaft; and
a tool holding fixture on the output shaft, the tool holding fixture having a multi-faced inner receptacle and a multi-faced outer receptacle, the multi-faced inner receptacle configured to connect to a tool insert that is configured to be locked in the multi-faced inner receptacle via a locking device assigned to the tool holding fixture, and the multi-faced outer receptacle configured to connect to a second tool insert that is configured to be locked on the multi-faced outer receptacle and in a same direction as the multi-faced inner receptacle connection to the tool insert,
wherein the locking device has a locking sleeve which is displaceable in an axial direction facing away from the handheld machine tool against a spring force applied by an associated spring element for unlocking the tool insert, from a locking position to an unlocking position,
wherein the locking sleeve has an operating element and a holding element which are connected to each other via a threaded connection, the holding element being acted upon by the associated spring element in the direction of the locking position of the locking sleeve, and the operating element is configured to enable the displacement of the locking sleeve from the locking position to the unlocking position.

2. The handheld machine tool as recited in claim 1 , wherein the operating element, at least in sections, has a spiral-shaped internal screw thread which, for the development of the screw connection, is screwed onto an outer thread of the holding element that is developed spiral-shaped, at least in sections.

3. The handheld machine tool as recited in claim 1 , wherein the operating element, at least in sections, has an internal screw thread developed from concentric waves which, for the development of the screw connection, is pressed onto an outer thread of the holding element that is developed of concentric waves, at least in sections.

4. The handheld machine tool as recited in claim 1 , wherein the operating element has a first mounting aid element and the holding element has a second mounting aid element, the first and the second mounting aid element being developed at least to facilitate the fastening of the operating element to the holding element.

5. The handheld machine tool as recited in claim 4 , wherein the first and the second mounting aid element are developed according to the type of eight-faced outer circumferences.

6. The handheld machine tool as recited in claim 1 , wherein at least two locking elements are assigned to the locking device, which in the locking position of the locking sleeve are are driven by the operating element into an associated locking position.

7. The handheld machine tool as recited in claim 1 , wherein the operating element has an outer grip region.

8. A handheld machine tool comprising:
an output shaft; and
a tool holding fixture on the output shaft, the tool holding fixture having a multi-faced inner receptacle and a multi-faced outer receptacle, the multi-faced inner receptacle configured to connect to a tool insert that is configured to be locked in the multi-faced inner receptacle via a locking device assigned to the tool holding fixture,
wherein the locking device has a locking sleeve which is displaceable in an axial direction facing away from the handheld machine tool against a spring force applied by an associated spring element for unlocking the tool insert, from a locking position to an unlocking position,
wherein the locking sleeve has an operating element and a holding element which are connected to each other via a threaded connection, the holding element being acted upon by the associated spring element in the direction of the locking position of the locking sleeve, and the operating element is configured to enable the displacement of the locking sleeve from the locking position to the unlocking position,
wherein a damping element is assigned to the threaded connection to damp vibrations that occur in the operation of the handheld machine tool, in the area of the threaded connection.

9. The handheld machine tool as recited in claim 8 , wherein damping element has an anti-vibration lacquer.

10. A tool holding fixture, comprising:
a multi-faced inner receptacle and a multi-faced outer receptacle, the multi-faced inner receptacle configured for connection to a tool insert which is configured to be locked in the multi-faced inner receptacle via a locking device assigned to the tool holding fixture, and the multi-faced outer receptacle configured to connect to a second tool insert that is configured to be locked on the multi-faced outer receptacle and in a same direction as the multi-faced inner receptacle connection to the tool insert,
wherein the locking device has a locking sleeve which is displaceable for unlocking the tool insert against a spring force applied by an associated spring element in an axial direction facing away from an associated handheld machine tool, from a locking position into an unlocking position,
wherein the locking sleeve has an operating element and a holding element which are connected to each other via a threaded connection, the holding element being driven by the associated spring element in a direction of the locking position of the locking sleeve, and the operating element is configured to enable the displacement of the locking sleeve from the locking position to the unlocking position.

Assignees

• Bosch Gmbh Robert

Inventors

• Yew Chuan Cheong
• Lim Huoyhuoy
• Yeoh Sim Teik
• Herrmann Falk

Classifications

• B25B21/00

  Portable power-driven screw or nut setting or loosening tools; (details or components, e.g. casings, bodies, of portable power-driven tools not particularly related to the operation performed B25F5/00; {for mounting or dismounting wheels B60B29/006}); Attachments for drilling apparatus serving the same purpose (machines B23P19/06) · CPC title

• B23B31/1071

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

• B25F5/006

  Vibration damping means · CPC title

• Y10T279/17

  Socket type · CPC title

• B25B23/0035 Primary

  Connection means between socket or screwdriver bit and tool · CPC title