Abstract: In rotors for electric motors, it is usual to fix the commutator on the rotor shaft by means of a press fit. In the present invention, the rotor shaft, with the rotor core fixed thereon, is electronically coated with an epoxy layer on opposite portions of the rotor shaft and in the winding slots, and is then heated on the plasticizing and curing temperature of the epoxy. After that, with the help of a sliding temperature, the commutator, whose inner bore has a clearance fit relative to the rotor shaft, is slipped onto the rotor shaft in a terminal position, in the process the still-viscous epoxy is pushed backward and is deposited radially on a connecting end face, forming a bead, and penetrates the annular gap between the inner bore and the rotor shaft. Once the epoxy layer has cooled, the commutator is fixed against rotation and displacement on the rotor shaft. The rotor is suitable for electric motors of various types.

Abstract: In a process for fixing a rotor winding (15), which is hooked to connection lugs (122) of commutator lamellas (121) of a commutator (12) in the vicinity between the connection lugs (122) and winding heads (151) that are embodied on the end face of the rotor body (11), in order to simplify the process, a shrink sleeve (16) is placed over the commutator (12) of the completed rotor (10) and is slid onto the winding heads (151) until the connection lugs (122) and the connection wires (152) of the rotor winding (15) that extend to the connection lugs (122) are covered. The mechanically fixed shrink sleeve (16) is homogeneously heated with hot air while the rotor (10) rotates so that after cooling, it shrinks onto the connection lugs (122) and connection wires (152) as well as onto parts of the winding heads (151).

Abstract: A process for fixing a rotor winding, which is hooked to connection lugs of commutator lamellas of a commutator in the vicinity between the connection lugs and winding heads that are embodied on the end face of the rotor body. In order to simplify the process, a shrink sleeve is placed over the commutator of the completed rotor and is slid onto the winding heads until the connection lugs and the connection wires of the rotor winding that extend to the connection lugs are covered. The mechanically fixed shrink sleeve is homogeneously heated with hot air while the rotor rotates so that after cooling, the shrink sleeve shrinks onto the connection lugs and connection wires as well as onto parts of the winding heads.

Abstract: When a commutator is slipped onto a rotor shaft that is provided with viscous epoxy, a bead of epoxy forms on the connecting end face of the commutator core and can hinder the process of winding the rotor. The novel commutator therefore has a receiving bore (25), which begins at the connecting end face (23) of the commutator and extends coaxially to the longitudinal axis (1) as far as a shoulder (26) and is adjoined by a conical bore (29) tapering toward a through bore (24). The bead (22) of epoxy that forms when the commutator is slipped onto the rotor shaft is completely covered by the receiving bore (25). The commutator is especially suitable for rotors of electrical machines.

Abstract: A rotor for an electric motor includes a commutator and a rotor shaft with a rotor winding that is contained in a rotor body supported on the rotor shaft in a rotationally fixed manner. The commutator has commutator lamellas that are disposed axially next to one another in the circumference direction with an insulation gap and have connection lugs for attachment of connecting wires of the rotor winding. In a region between the commutator and the rotor body, an additional winding is wound around the connecting wires in order to fix or stabilize the connecting wires. The rotor is provided for electric motors used in vehicle construction.

Abstract: In rotors for electric motors, it is usual to fix the commutator on the rotor shaft by means of a press fit. In the process, damage undesirably occurs to the surface of the rotor shaft.

Abstract: The proposed support element (12) for a wiper strip (15) of rubber-elastic material belonging to a wiper blade (10) for motor vehicle windshields is fastened to the underside (22) of the elongated springing-elastic support element (12) facing the windshield so as to be parallel to the longitudinal axis, wherein this support element (12) is produced through the use of woven fiber material that is impregnated with a reaction mixture. A particularly simple and economical production of the support element (12) is possible when this support element (12) is produced entirely from the fiber material impregnated with the reaction mixture.

Abstract: In rotors for electric motors, it is usual to fix the commutator on the rotor shaft by a press fit. In the present invention, the rotor shaft, with the rotor core fixed thereon, is electrostatically coated with an epoxy layer on opposite portions of the rotor shaft and in the winding slots, and is then heated to the plasticizing and curing temperature of the epoxy. After that, by a sliding tool, the commutator, whose inner bore has a clearance fit relative to the rotor shaft, is slipped onto the rotor shaft in a terminal position, in the process the still-viscous epoxy is pushed backward and is deposited radially on a connecting end face, forming a bead, and penetrates the annular gap between the inner bore and the rotor shaft. Once the epoxy layer has cooled, the commutator is fixed against rotation and displacement on the rotor shaft. The rotor is suitable for electric motors of various types.