Drive motor with a connection device

A drive motor for a suction device or a machine tool in the form of a handheld power tool or a semi-stationary machine tool, wherein the drive motor includes a stator having an excitation coil assembly and a rotor having a motor shaft, which is rotatably mounted around a rotational axis on the stator or with respect to the stator by means of a bearing assembly, wherein the drive motor includes a connecting unit for electrically connecting the drive motor to an energizing unit for energizing the excitation coil assembly, wherein the connecting unit includes a base body for fastening on the stator and a receptacle arm protruding from the base body, between which a conductor receptacle for at least one electrical coil conductor of an excitation coil of the excitation coil assembly is formed, and wherein the connecting unit includes a connecting contact region for electrically connecting a connecting line for the connection to the energizing unit, and wherein the receptacle arm and the base body are connected to one another by means of two electrically conductive connection regions and form a receptacle eye enclosing the conductor receptacle in a ring shape, so that the conductor receptacle has a closed state, and a welding current between the base body and the receptacle arm can flow past the conductor receptacle via the electrical connection regions, and

• wherein the connecting unit includes, in the region of the conductor receptacle, an elongated support surface and a lateral narrow side angled thereto, wherein an oblique surface obliquely inclined to the support surface and to the narrow side for supporting the at least one coil conductor is arranged between the support surface and the narrow side.

A method for installing an electrical connecting unit of a drive motor for a suction device or a machine tool in the form of a handheld power tool or a semi-stationary machine tool, wherein the drive motor includes a stator having an excitation coil assembly and a rotor having a motor shaft, which is rotatably mounted around a rotational axis on the stator or with respect to the stator by means of a bearing assembly, wherein the drive motor includes a connecting unit for electrically connecting the drive motor to an energizing unit for energizing the excitation coil assembly, wherein the connecting unit includes a base body for fastening on the stator and a receptacle arm protruding from the base body, between which a conductor receptacle for at least one electrical coil conductor of an excitation coil of the excitation coil assembly is formed, and wherein the connecting unit includes a connecting contact region for electrically connecting a connecting line for the connection to the energizing unit, the method comprising:

• inserting the at least one coil conductor into the conductor receptacle
• connecting the receptacle arm and the base body while forming two electrically conductive connection regions, so that the receptacle arm and the base body form a receptacle eye enclosing the conductor receptacle in a ring shape and the conductor receptacle has a closed state;
• and
• applying welding electrodes to the base body and the connection arm and energizing using a welding current, which flows via the electrical connection regions past the conductor receptacle between the base body and the receptacle arm,
• wherein, on at least one of the electrical connection regions, between the base body and the receptacle arm, a support contour for supporting the at least one coil conductor at a distance to an inner surface, of the conductor receptacle is arranged on the connection region, so that the at least one coil conductor is not in touch contact with the connection region during energizing using the welding current.