US-12623331-B2 - Hand-held power tool

Abstract

A hand-held power tool includes (i) a drive unit which can be actuated by way of at least one hand switch, (ii) a control unit at least for controlling the drive unit, wherein the control unit has a control unit circuit board and a control unit housing, and (iii) an energy-supply interface which is designed to establish a connection to an energy supply. The control unit housing has at least one cooling element which is designed to cool at least the control unit circuit board.

Inventors

• Joachim Hecht

Assignees

• ROBERT BOSCH GMBH

Dates

Publication Date

20260512

Application Date

20221109

Priority Date

20211129

Claims (10)

1. 1 . A hand-held power tool, comprising: a drive unit configured to be actuated by way of at least one hand switch; a control unit configured to at least control the drive unit, wherein the control unit has a control unit circuit board and a control unit housing; and an energy-supply interface which is designed to establish a connection to an energy supply, wherein the control unit housing has at least one cooling element which is designed to cool at least the control unit circuit board, and wherein the cooling element is interposed between the control unit circuit board and the energy supply interface.
2. 2 . The hand-held power tool according to claim 1 , wherein the cooling element is arranged at least partially overlapping a base of the control unit housing.
3. 3 . The hand-held power tool according to claim 1 , wherein the cooling element at least partially forms a base of the control unit housing.
4. 4 . The hand-held power tool according to claim 1 , wherein the cooling element is designed as a cooling plate.
5. 5 . The hand-held power tool according to claim 1 , wherein the cooling element has at least one heat absorption element which is designed to absorb at least heat from at least one power component of the control unit circuit board.
6. 6 . The hand-held power tool according to claim 1 , wherein the control unit housing has at least one heat conduction opening which is designed to conduct heat from the control unit circuit board to the cooling element.
7. 7 . The hand-held power tool according to claim 1 , wherein the cooling element at least partially comprises an electrically insulating coating.
8. 8 . The hand-held power tool according to claim 1 , wherein the control unit housing is at least partially overmolded around the cooling element by way of an injection molding method.
9. 9 . The hand-held power tool according to claim 1 , wherein the control unit housing has at least one frame-like holding element which is designed to at least partially hold the cooling element.
10. 10 . The hand-held power tool according to claim 1 , wherein: the cooling element has at least one coupling element, the control unit housing has at least one connecting element, and the coupling element is designed to hold the connecting element.

Description

This application is a 35 U.S.C. § 371 National Stage Application of PCT/EP2022/081335, filed on Nov. 9, 2022, which claims the benefit of priority to Serial No. DE 10 2021 213 443.2, filed on Nov. 29, 2021 in Germany, the disclosures of which are incorporated herein by reference in their entirety. The present disclosure relates to a hand-held power tool. BACKGROUND A hand-held power tool comprising a drive unit, a housing and a control unit is already known from the prior art, in which the control unit has a control unit housing and a control unit circuit board. SUMMARY The present disclosure relates to a hand-held power tool including a drive unit, whereby the drive unit can be actuated by means of at least one hand switch, comprising a control unit at least for controlling the drive unit, whereby the control unit has a control unit circuit board and a control unit housing, and comprising an energy supply interface which is designed to establish a connection to an energy supply. It is proposed that the control unit housing has at least one cooling element which is designed to cool at least the control unit circuit board. The disclosure provides a hand-held power tool that makes it possible to process higher currents through the control unit. The disclosure achieves this by way of the cooling element, which cools at least the control unit circuit board. The invention provides a hand-held power tool that makes it possible to process higher currents through the control unit. The invention achieves this by means of the cooling element, which cools at least the control unit circuit board. The hand-held power tool can be designed as an electrically or pneumatically operated hand-held power tool. The electrically operated hand-held power tool can in this case be designed as a grid-powered or battery-driven hand-held power tool. The hand-held power tool can, e.g., be designed as a screwdriver, a pneumatic screwdriver, a drill driver, a rotary impact screwdriver, a hammer, a hammer drill, a pneumatic rotary impact screwdriver, or an impact drill driver. The drive unit is designed such that it can be actuated via a hand switch. When the hand switch is actuated by a user, then the drive unit is switched on and the hand-held power tool is put into operation. If the hand switch is not further actuated by the user, then the drive unit is switched off. Preferably, the drive unit can be electronically controlled and/or regulated such that reversing operation and a preset for a desired rotational speed can be realized. It is also conceivable that the hand switch is a latching hand switch that can be latched in at least one position during at least one actuation state. In reversing mode, the drive unit can be switched between clockwise and counter-clockwise rotation. To switch the drive unit in reversing mode, the hand-held power tool can have a rotation direction changeover element, in particular a rotation direction changeover switch. The drive unit includes at least one drive motor, and in one embodiment it can comprise at least one transmission. In particular, the drive motor can be designed as at least one electric motor. The transmission can be designed as at least one planetary gear, whereby it can, for example, be shiftable. In a shiftable transmission, it is possible to switch between at least two gear stages by way of at least one gear shifting element, in particular a gear shifter. The disclosure can also be applied to other types of motors or transmissions. In addition, the hand-held power tool comprises the energy supply interface, which is designed to establish the connection to the energy supply. The energy supply interface enables a mechanical and energetic, in particular electrical, connection to the energy supply. The energy supply can, e.g., provide electrical or pneumatic energy. In this case, the energy supply is, by way of example, provided for battery operation by way of batteries, in particular hand-held power tool battery packs and/or via a power grid. In a preferred embodiment, the energy supply is designed for battery-driven operation. In the preferred embodiment, the energy supply interface is designed as a battery pack interface, in particular a hand-held power tool battery pack interface, for connection to the battery pack, in particular a hand-held power tool battery pack. In the context of the present disclosure, the expression “hand-held power tool battery pack” is understood to mean a combination of at least one battery cell and a battery pack housing. The hand-held power tool battery pack is advantageously designed for supplying energy to commonly available battery-driven hand-held power tools. The at least one battery cell can, e.g., be a Li-ion battery cell with a nominal voltage of 3.6 V. The hand-held power tool battery pack can, e.g., comprise up to ten battery cells, whereby a different number of battery cells also is conceivable. Both an embodiment as a battery-driven, hand-held pow