Hand-held power tool with a mode-setting device

Patent metadata

Field	Value
Publication number	US-11413737-B2
Application number	US-201816768687-A
Country	US
Kind code	B2
Filing date	Nov 26, 2018
Priority date	Dec 6, 2017
Publication date	Aug 16, 2022
Grant date	Aug 16, 2022

Abstract

A hand-held power tool includes a housing in which a drive motor and a transmission that is configured to be driven by the drive motor so as to drive an output shaft are arranged. The hand-held power tool also includes a mode-setting device that has at least one rotatable actuation element configured to set an operating mode, a torque-adjusting element configured to adjust a torque, and a gear changing element configured to change gears of the transmission. The torque adjusting element and the gear changing element are releasably coupled together during a gear changing process.

First claim

The invention claimed is:

1. A hand-held power tool, comprising:
a housing;
a drive motor arranged in the housing;
a transmission arranged in the housing and configured to be driven by the drive motor so as to drive an output shaft; and
a mode-setting device comprising:
at least one rotatable actuating element configured to set an operating mode,
at least one torque-setting element configured to set a torque, and
at least one gear-changing element configured to change gears of the transmission,

wherein the torque-setting element and the gear-changing element are configured to be separably coupled to each other such that, in at least one position of the actuating element, the torque-setting element and the gear-changing element are decoupled from one another, and
wherein, during a gear change, the torque-setting element and the gear-changing element are coupled to one another such that, to change the gears, rotation of the actuating element acts on the gear-changing element via the torque-setting element.

2. The hand-held power tool as claimed in claim 1 , wherein during setting of the torque, the torque-setting element and the gear-changing element are decoupled from each other.

3. The hand-held power tool as claimed in claim 1 , wherein the mode-setting device further comprises a coupling element that is movably arranged on the torque-setting element and is configured to selectively couple and decouple the torque-setting element and the gear-changing element, and the coupling element couples the torque-setting element to the gear-changing element in such a way that the rotation of the actuating element acts on the gear-changing element via the torque-setting element and the actuating element.

4. The hand-held power tool as claimed in claim 3 , wherein the coupling element is arranged in a pivotable manner on the torque-setting element.

5. The hand-held power tool as claimed in claim 3 , wherein the coupling element is arranged in an axially movable manner on the torque-setting element.

6. The hand-held power tool as claimed in claim 3 , wherein the coupling element has a guide element that, upon a rotation of the actuating element, acts in combination with a guideway, which is solid with the housing, to couple and decouple the torque-setting element and the gear-changing element.

7. The hand-held power tool as claimed in claim 3 , wherein the coupling element includes an elastic coupling arm that interacts with the torque-setting element and the gear-changing element to selectively couple the torque-setting element and the gear-changing element.

8. The hand-held power tool as claimed in claim 6 , wherein the guideway extends in a circumferential direction on an inner face of the housing.

9. The hand-held power tool as claimed in claim 1 , wherein the gear-changing element is rotatably mounted relative to the housing and is configured to rotate with the actuating element during the changing of the gears.

10. The hand-held power tool as claimed in claim 1 , further comprising a torque-limiting device, which acts in combination with the torque-limiting device to set a maximum transmissible torque of the power tool.

11. The hand-held power tool as claimed in claim 1 , further comprising a percussion mechanism, wherein the mode-setting device is configured to activate and deactivate the percussion mechanism.

12. The hand-held power tool as claimed in claim 1 , wherein the transmission is configured as a planetary transmission having a selector ring gear that is acted on by a selector bail so as to shift the planetary transmission, and wherein the gear-changing element has a loading element configured to apply load to the selector bail at least during a gear change.

13. The hand-held power tool as claimed in claim 1 , wherein the actuating element is arranged on an exterior of the power tool and is rotatable to set the operating mode.

14. The hand-held power tool as claimed in claim 1 , wherein the at least one actuating element is a single actuating element configured to set the torque and actuate the gear change.

15. A hand-held power tool, comprising:
a housing;
a drive motor arranged in the housing;
a transmission arranged in the housing and configured to be driven by the drive motor so as to drive an output shaft and
a mode-setting device comprising:
at least one rotatable actuating element configured to set an operating mode,
at least one torque-setting element configured to set a torque, and
at least one gear-changing element configured to change gears of the transmission,

wherein the torque-setting element and the gear-changing element are configured to be separably coupled to each other,
wherein, during a gear change, the torque-setting element and the gear-changing element are coupled to one another,
wherein the mode-setting device further comprises a coupling element that is movably arranged on the torque-setting element and is configured to selectively couple and decouple the torque-setting element and the gear-changing element
wherein the coupling element has a guide element that, upon a rotation of the actuating element, acts in combination with a guideway, which is solid with the housing, to couple and decouple the torque-setting element and the gear-changing element, and
wherein the guide element extends in a radial direction of the mode-setting device.

16. A hand-held power tool comprising:
a housing;
a drive motor arranged in the housing;
a transmission arranged in the housing and configured to be driven by the drive motor so as to drive an output shaft; and
a mode-setting device comprising:
at least one rotatable actuating element configured to set an operating mode,
at least one torque-setting element configured to set a torque, and
at least one gear-changing element configured to change gears of the transmission,

wherein the torque-setting element and the gear-changing element are configured to be separably coupled to each other such that, in at least one position of the actuating element, the torque-setting element and the gear-changing element are decoupled from one another,
wherein, during a gear change, the torque-setting element and the gear-changing element are coupled to one another such that, to change the gears, rotation of the actuating element acts on the gear-changing element via the torque-setting element, and
wherein a mode indicator element is assigned to the gear-changing element, the mode- indicator being moved in a longitudinal direction of the housing during setting of the operating mode so as to visualize a respectively assigned operating mode.

17. The hand-held power tool as claimed in claim 16 , wherein the mode indicator element is configured as a loading element configured to apply load to a selector bail and/or for displaying the respectively assigned operating mode.

18. The hand-held power tool as claimed in claim 16 , wherein the gear-changing element has a guide pin, and the mode indicator element has a guide groove, and wherein the guide pin moves the mode indicator element along the guide groove during setting of the operating mode.

Assignees

• Bosch Gmbh Robert

Inventors

• Duerr Thomas
• Munkacsi Istvan
• Bohos Tibor

Classifications

• B25D16/006

  Mode changers; Mechanisms connected thereto · CPC title

• B25D2216/0038

  Tools having a rotation-only mode · CPC title

• B25D2250/165

  Overload clutches, torque limiters · CPC title

• B25D2216/0023

  Tools having a percussion-and-rotation mode · CPC title

• B25F5/001 Primary

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