Abstract: The electric motor has a liquid-cooled stator with an ironless hollow-cylinder stator winding and a coolant circuit for conducting a coolant through the electric motor. The electric motor also has a rotor arranged rotatably concentrically to the stator, a motor housing accommodating the stator and the rotor, a connection assembly and at least one electrical connection line for electrically connecting the stator winding. A connection assembly for such an electronically commutated electric motor is also provided. The connection assembly has a closure cover, at least one plug-in connection means for establishing electrical contact between the stator winding and the electrical connection line, and also a sealing element between the plug-in connection means and a housing of the connection assembly. The connection assembly implements fluid-tight sealing of the motor housing.

Abstract: An electric direct current motor is disclosed which includes a shaft, a winding support, a collector having several collector wires, and an air-cored outer rotor winding with several winding terminations. The outer rotor winding is at one end connected to the shaft via the winding support in a torque-proof manner, and is electrically connected with the collector. The winding support can be replaced by a printed circuit board as a bearing component of glass-fiber reinforced thermosetting plastics, wherein the printed circuit board includes at least one layer and is connected to the shaft via a metal hub.

Abstract: The present invention relates to a brush cover for a brush-commutated electric motor. The brush cover comprises at least one lever brush which is mounted rotatably about an axis at the brush cover by means of a bolt. According to the invention, the bolt is surrounded, at least in sections, by at least one damping sleeve of an elastomer.

Abstract: An electric direct current motor is disclosed which includes a shaft, a winding support, a collector having several collector wires, and an air-cored outer rotor winding with several winding terminations. The outer rotor winding is at one end connected to the shaft via the winding support in a torque-proof manner, and is electrically connected with the collector. The winding support can be replaced by a printed circuit board as a bearing component of glass-fiber reinforced thermosetting plastics, wherein the printed circuit board includes at least one layer and is connected to the shaft via a metal hub.

Abstract: An electric direct current motor is disclosed which includes a shaft, a winding support, a collector having several collector wires, and an air-cored outer rotor winding with several winding terminations. The outer rotor winding is at one end connected to the shaft via the winding support in a torque-proof manner, and is electrically connected with the collector. The winding support can be replaced by a printed circuit board as a bearing component of glass-fiber reinforced thermosetting plastics, wherein the printed circuit board includes at least one layer and is connected to the shaft via a metal hub.

Abstract: The present invention relates to a bearing assembly for an electric motor, in particular for a small electric motor. It comprises an axially preloaded ball bearing with an inner race and an outer race. The bearing assembly further comprises an axial stop, a spring element disposed between the axial stop and the inner or outer race, respectively, for generating the axial preload, and a thrust washer made of metal and disposed between the spring element and the inner or outer race. It is provided according to the invention that the thrust washer is coated on both sides with a layer increasing static friction.

Abstract: A spring washer is disclosed for axially preloading anti-friction bearings. The spring washer can include an outer ring and an inner ring that is coaxially arranged with respect to the outer ring. An axis is defined by the two rings. Outer and inner rings are connected through several resilient connection rods. Resilient cantilevered rods can be provided which extend from one of the rings in between the connection rods and which have a free end at the opposite positioned ring. Thereby, the cantilevered rods can be axially bent up such that the free end has an axial offset.

Abstract: The present invention relates to a method of establishing a press fit of a component with a mounting hole on a shaft. It aims at providing a method that allows exact positioning of the component to be mounted on the shaft as well as a flexible way of use. To this end, the method is so conceived that an inner surface of the mounting hole of the component and/or a circumferential surface of the shaft is/are partially fused so that calotte-shaped projections protruding beyond the inner surface of the mounting hole and/or the circumferential surface of the shaft will form, that the component and/or the shaft is/are subsequently cooled, so that the calotte-shaped projections will solidify, and that the component is then slipped onto the shaft until the mounting hole is positioned in a fastening area of the shaft. In addition, the present invention also relates to components for establishing a press fit of a shaft-hub connection.

Abstract: A DC motor is disclosed which includes a motor housing and at least one connection module adapted to be installed on the motor housing. The DC motor can be compact, flexibly adaptable to customer requirements and also easily installable in the case of a confined installation space. For this purpose, the motor housing can include a front-sided centering elevation or centering recess which cooperates with a centering recess or a centering elevation on the connection module. The connection module can be freely rotatable in a mounting state on the motor housing, and non-rotatably connected to the motor housing in the mounted state.

Abstract: An electric direct current motor is disclosed which includes a shaft, a winding support, a collector having several collector wires, and an air-cored outer rotor winding with several winding terminations. The outer rotor winding is at one end connected to the shaft via the winding support in a torque-proof manner, and is electrically connected with the collector. The winding support can be replaced by a printed circuit board as a bearing component of glass-fiber reinforced thermosetting plastics, wherein the printed circuit board includes at least one layer and is connected to the shaft via a metal hub.

Abstract: The invention relates to a feeder device (1) for insertion machines for printed circuit boards, comprising a housing, a drive motor (3, 3?), a gear unit (5) and a pin wheel (6) engaging with a transport tape. The drive motor and the gear unit are arranged on a common side wall (2) of the housing such that the axles thereof are perpendicular to the side wall. It is the object of the invention to provide a narrow structural design of the feeder device, which also allows easy mounting. To this end, the rotor (14, 14?) of the drive motor (3) is rotatably mounted on only one axle (4, 4?) which is fixedly connected to the side wall (2) of the housing.

Abstract: A spring washer is disclosed for axially preloading anti-friction bearings. The spring washer can include an outer ring and an inner ring that is coaxially arranged with respect to the outer ring. An axis is defined by the two rings. Outer and inner rings are connected through several resilient connection rods. Resilient cantilevered rods can be provided which extend from one of the rings in between the connection rods and which have a free end at the opposite positioned ring. Thereby, the cantilevered rods can be axially bent up such that the free end has an axial offset.

Abstract: A DC motor is disclosed which includes a motor housing and at least one connection module adapted to be installed on the motor housing. The DC motor can be compact, flexibly adaptable to customer requirements and also easily installable in the case of a confined installation space. For this purpose, the motor housing can include a front-sided centering elevation or centering recess which cooperates with a centering recess or a centering elevation on the connection module. The connection module can be freely rotatable in a mounting state on the motor housing, and non-rotatably connected to the motor housing in the mounted state.

Abstract: The present invention relates to a method of establishing a press fit of a component with a mounting hole on a shaft. It aims at providing a method that allows exact positioning of the component to be mounted on the shaft as well as a flexible way of use. To this end, the method is so conceived that an inner surface of the mounting hole of the component and/or a circumferential surface of the shaft is/are partially fused so that calotte-shaped projections protruding beyond the inner surface of the mounting hole and/or the circumferential surface of the shaft will form, that the component and/or the shaft is/are subsequently cooled, so that the calotte-shaped projections will solidify, and that the component is then slipped onto the shaft until the mounting hole is positioned in a fastening area of the shaft. In addition, the present invention also relates to components for establishing a press fit of a shaft-hub connection.

Abstract: A feeder device is disclosed for insertion machines for printed circuit boards, including a housing, a drive motor, a gear unit and a pin wheel engaging with a transport tape. The drive motor and the gear unit are arranged on a common side wall of the housing such that the axles thereof are perpendicular to the side wall. A narrow structural design of the feeder device can be provided, which also allows easy mounting. To this end, the rotor of the drive motor is rotatably mounted on only one axle which is fixedly connected to the side wall of the housing.

Abstract: A small electric motor comprising a stator, a rotor with a rotor shaft, and a projecting shaft end of the rotor shaft which has arranged thereon an element to be driven, so as to be of a vibration-low construction. The other shaft end of the rotor shaft is also designed as a projecting shaft end and a balancer is arranged on said other shaft end with an arrangement and mass or weight distribution that are predetermined for the dynamic balancing of the element to be driven.

Abstract: The present invention refers to a dc motor, in particular a micro dc motor, comprising a shaft and a collector element arranged on said shaft and consisting of a collector plate and a collector which projects from said collector plate beyond the shaft end, the collector element being extended beyond the collector so as to form a shaft section on the side facing away from the collector plate, said shaft section being adapted to have attached thereto an additional component part. In accordance with a preferred embodiment, the dc motor is provided with an incremental angle-position encoder comprising an encoder element, the encoder element being fixedly attached to the collector element, which is extended so as to form a shaft section, and constituting the additional component part.

Abstract: A phase grating is provided in this length or angle measuring apparatus, which operates by interference. A beam striking the phase grating from a laser is diffracted into .+-.1st order beams at the phase grating. The diffracted .+-.1st order beams are reflected at retroreflecting elements and, diffracted once again at the phase grating, and made to interfere in pairs. The modulations in intensity of the two-beam interferences are converted by detectors into electrical signals that are phase-displaced from one another. The diffraction grating is configured such that at least one partial beam cluster of the zero order of diffraction is involved in the formation of at least one of the two-beam interferences.