公开(公告)号：US20230139444A1

公开(公告)日：2023-05-04

申请号：US17918844

申请日：2021-04-20

Applicant: Hilti Aktiengesellschaft

Inventor： Yuan Yik KOK ,  Christian KOSCHEL ,  Christian RUFF ,  Markus LOOSER

IPC: H03K17/955 ,  H03K17/96 ,  B25F5/00

Abstract: A hand-held machine tool (1) including a drive device (4) by which a tool that can be brought into operative connection with the machine tool (1) can be actuated, with a control device (8) for actuating the drive device (4) and at least one capacitive sensor element (30, 35) operatively connected to the control device (8) being provided. The at least one element (2, 75) of the machine tool that is arranged in the region of the capacitive sensor element (30, 35) is grounded.

公开(公告)号：US20250038598A1

公开(公告)日：2025-01-30

申请号：US18713903

申请日：2022-11-11

Applicant: Hilti Aktiengesellschaft

Inventor： Markus HARTMANN ,  Torsten ASMUS ,  Stefan SCHWARZ ,  Robert STANGER ,  Pierre PALLMER ,  Simon STEENTJES ,  Stefan HEROLD ,  Christian RUFF

IPC: H02K3/18 ,  B25F5/00 ,  H02K7/14

Abstract: An electric motor, in particular for a power tool, the electric motor having a stator with an inner opening for receiving a rotor. The inner opening has a diameter corresponding to an inner diameter of a stator, the stator having a series of pole teeth, which are each wound with a winding to form a coil. The winding is characterized by a reference diameter, a ratio of the reference diameter to the stator inner diameter multiplied by a number of pole teeth being greater than 0.3. Taking into account the internal resistance of an energy storage cell of an energy supply device of a maximum of 10 milliohms, the ratio of the diameters may be greater than 0.03 (milliohms)−1. Also provided is an electric motor, in particular for a power tool, a ratio being formed from a sum of total winding conductor cross sections and a free winding cross section, the ratio being multiplied by a number of pole teeth and the product being greater than 2.2. Taking into account the internal resistance of an energy storage cell of the energy supply device of a maximum of 10 milliohms, the ratio of the areas of the cross sections may be greater than 0.22 (milliohms)−1. Also provided is a power tool with one of the electric motors, and a system including a power tool and an energy supply device.

公开(公告)号：US20230238957A1

公开(公告)日：2023-07-27

申请号：US17918734

申请日：2021-04-20

Applicant: Hilti Aktiengesellschaft

Inventor： Christian KOSCHEL ,  Christian RUFF ,  Stefan SCHWARZ ,  Georg FÜRFANGER

IPC: H03K17/96

CPC classification number: H03K17/9622 ,  H03K2217/960705

Abstract: A hand-held machine tool (1) is provided including a housing (2), with a drive device for actuating a tool that can be brought into operative connection with the machine tool (1) and a control device (8) for actuating the drive device (4) being provided, and the control device (4) being designed with a control element (10), and at least one capacitive sensor element (32, 33) operatively connected to the control device (10) being provided. The at least one sensor element (32, 33) and/or the control element (10) is at least partially, in particular almost completely separated from a main channel (50) of the machine tool (1) in which the drive device (4) is arranged.

公开(公告)号：US20230170902A1

公开(公告)日：2023-06-01

申请号：US17918487

申请日：2021-04-20

Applicant: Hilti Aktiengesellschaft

Inventor： Christian KOSCHEL ,  Christian RUFF ,  Stefan SCHWARZ ,  Georg FÜRFANGER

IPC: H03K17/96 ,  B24B23/02 ,  B25F5/02 ,  H03K5/24

CPC classification number: H03K17/962 ,  B24B23/028 ,  B25F5/02 ,  H03K5/24

Abstract: A method is provided for actuating a hand-held machine tool including a drive device, with a control device for actuating the drive device and at least two capacitive sensor elements operatively connected to the control device being provided. The method includes the following method steps of determining an electrical charge of the first and second sensor element comparing the determined first electrical charge with a defined first threshold value and the determined second electrical charge with a defined second threshold value; enabling the actuation of the drive device and/or defined activation of the drive device via the control device when a predefined condition exists between the determined first electrical charge of the first sensor element and the determined detected second electrical charge of the second sensor element. A machine tool for carrying out a method of this kind is also described.

公开(公告)号：US20230060201A1

公开(公告)日：2023-03-02

申请号：US17918969

申请日：2021-04-20

Applicant: Hilti Aktiengesellschaft

Inventor： Christian KOSCHEL ,  Christian RUFF ,  Stefan SCHWARZ ,  Georg FÜRFANGER

IPC: H03K17/955 ,  H03K17/96

Abstract: A method is provided for operating a hand-held machine tool including a drive device, with a control device for actuating the drive device and at least two capacitive sensor elements operatively connected to the control device being provided. The method includes the following method steps of determining a first and second electrical charge of the first and second sensor element comparing the determined first electrical charge with a defined first threshold value and the determined second electrical charge with a defined second threshold value which differs from the first threshold value; enabling, via the control device, the actuation of the drive device when the first electrical charge is greater than the defined first threshold value and/or the second electrical charge is greater than the defined second threshold value. A machine tool for carrying out a method of this kind is also described.