Handheld power tool

Patent metadata

Field	Value
Publication number	US-11648657-B2
Application number	US-201816160415-A
Country	US
Kind code	B2
Filing date	Oct 15, 2018
Priority date	Oct 19, 2017
Publication date	May 16, 2023
Grant date	May 16, 2023

Abstract

A handheld power tool includes an output shaft, a drive unit, a securing ring, and a securing element. The output shaft is configured to be releasably connected to an insert tool of the handheld power tool. The drive unit is configured to transmit a movement to the output shaft. The securing element is configured to secure the securing ring. The securing element has a recess which is provided to surround the securing ring in the radial direction in at least one operating state.

First claim

What is claimed is:

1. A handheld power tool, comprising:
an output shaft configured to be releasably connected to an insert tool, the output shaft defining a securing groove that encircles the output shaft, the output shaft having a flange that extends radially outwardly;
a drive unit configured to transmit a movement to the output shaft;
a securing element defining a recess that is aligned with the securing groove, the securing element being a transmission gear element or a brake element that is configured to brake the transmission gear element;
a securing ring having an inner portion received in the securing groove and an outer portion received in and radially surrounded by the recess so as to secure the securing ring; and
a bearing element having a first end that abuts the flange of the output shaft and a second opposite end that is secured by the securing ring.

2. The handheld power tool according to claim 1 , wherein the recess delimits the securing element at least partially in at least one of the radial direction and an axial direction of an output axis.

3. The handheld power tool according to claim 1 , wherein the securing groove has a bent contour.

4. The handheld power tool according to claim 1 , wherein:
the securing element and the securing groove form a securing apparatus, and
the securing apparatus is configured to secure the securing ring against independently coming loose in at least one operating state.

5. The handheld power tool according to claim 1 , wherein the securing element has a supporting region that contacts the bearing element in an axial direction, the supporting region being radially spaced apart from the output shaft.

6. The handheld power tool according to claim 5 , wherein (i) the transmission gear element or the brake element, and/or (ii) the bearing element is connected to the output shaft by an interference fit.

7. The handheld power tool according to claim 1 , wherein:
the output shaft has a first contact region forming a first active surface for the bearing element of the drive shaft,
the output shaft has a second contact region forming a second active surface for the securing element, and
the securing groove separates the first contact region from the second contact region and is adjacent to both the first and second contact regions.

8. The handheld power tool according to claim 1 , wherein the bearing element and the one of the transmission gear element and or the brake element are surrounded by a machine housing.

9. The handheld power tool, according to the claim 1 , wherein the securing ring is a circlip.

10. The handheld power tool according to claim 1 , wherein the handheld power tool is an angle grinder.

11. The handheld power tool according to claim 3 , wherein the securing groove has a concave contour.

12. The handheld power tool according to claim 5 , wherein the bearing element is a roller bearing element.

13. The handheld power tool according to claim 8 , wherein the machine housing is a transmission housing.

14. The handheld power tool according to claim 1 , wherein the securing element is the transmission gear element, and the recess is defined in the transmission gear element.

15. The handheld power tool according to claim 1 , wherein the securing element is the brake element, and the recess is defined in the brake element.

Assignees

• Bosch Gmbh Robert

Inventors

• Barth Daniel
• Lutz Manfred
• Tuerk Metin
• Stierle Peter
• Schomisch Thomas

Classifications

• B25F5/001

  Gearings, speed selectors, clutches or the like specially adapted for rotary tools · CPC title

• B24B23/028

  Angle tools · CPC title

• B25F5/02 Primary

  Construction of casings, bodies or handles {(B25F5/006, B25F5/008 take precedence)} · CPC title

• B25F5/00 Primary

  Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for · CPC title

• B25F3/00

  Associations of tools for different working operations with one portable power-drive means; Adapters therefor · CPC title