Abstract: In a rotor member fixed by press-fitting to a rotary shaft part of an electric motor, the inner circumferential face of a sleeve part has an inner circumferential tapered face in which the inside diameter of the sleeve part continuously increases at a fixed ratio in a direction from a first end towards a second end. In addition, an outer circumferential face of the sleeve part has an outer circumferential tapered face in which the outside diameter of the sleeve part continuously decreases at a fixed ratio in a direction from the first end towards the second end in an axial-direction segment of the sleeve part in which at least the inner circumferential tapered face is present.

Abstract: A method for mounting laminated sheets onto a shaft of a rotor provided for an electrical machine may involve sliding the laminated sheets onto the shaft and bracing the laminated sheets between two rotation-resistant thrust washers connected with the shaft. The laminated sheets may be slid onto the shaft to lie against a stop in the form of a first thrust washer arranged upon a first subsection of the shaft. A second thrust washer may be pressed in by axially bracing the laminated sheets onto a second axial subsection of the shaft in a frictional interlocking manner. The second thrust washer may be positioned after a surface of the second subsection has been enlarged by the introduction of an exterior surface profile.

Abstract: A stator for an electrical machine with a stator body (2, 102) and a ground contact (3, 103) which is electrically connected to the stator body, wherein the stator body is arranged in a motor housing (4, 104), which is formed from plastic material. In order to have a compact stator that is easy to install and at the same time has a reliable contact to a ground contact, it is provided that the motor housing has a stator holder (7, 107), which receives the stator body in the operating position, and is located on the inner surface of at least one of its housing parts, and to arrange and fix the ground contact at the inner circumference of the stator holder, facing the stator body, so that the stator body can be electronically contacted by the ground contact.

Abstract: A resolver can have a stator installed in a housing simply, without requiring a special jig. In the resolver including a housing and a stator core fixed in the housing, the stator core is fixed to the inside of the housing by rotating relative to the housing.

Abstract: A rotor includes a hollow cylindrical rotor core that has a center hole, in which a rotating shaft is to be press-fitted, and a plurality of magnet-receiving holes in which a plurality of permanent magnets are respectively received. In a radially inner surface of the rotor core defining the center hole, there are formed a plurality of non-contacting recesses and a plurality of contacting protrusions alternately in the circumferential direction of the rotor core. Each of the non-contacting recesses is recessed radially outward so as not to be in contact with the rotating shaft. Each of the contacting protrusions protrudes radially inward so as to be in pressed contact with the rotating shaft. The rotor core further has a plurality of through-holes each of which penetrates the rotor core in the axial direction of the rotor core and is located radially outside a corresponding one of the contacting protrusions.

Abstract: A motor shaft onto the outer periphery of which a plurality of members are to be press-fitted includes a plurality of step portions which successively expand the outer diameter of the motor shaft from one end side, and a plurality of press-fit portions which are arranged adjacent to one end sides of the respective step portions and onto which the members are to be press-fitted.

Abstract: A rotor (100) for an electric motor (1000). The rotor (100) has a rotor shaft (10) and a rotor core (20) attached onto the rotor shaft (10). The rotor core has a plurality of core laminations (40, 140) arranged along an axis (A) of the rotor core (20), and has a plurality of poles of at least one pole pair, the core lamination (40, 140) having: a central recess (70, 170) through which the rotor shaft (10) passes and which has a contour (71, 171) as well as adjacent areas (AF), and a plurality of receiving structures arranged at peripheral angular positions in order to each form a receiving element for a pole-forming element on the rotor core (20).

Abstract: A rotor including: a shaft; a structure comprising at least one end ring and rotor bars, wherein at least the end ring comprises a material subject to expansion or movement radially outward from the shaft upon a rotor balancing process that involves spinning of the structure; a core that at least partially encloses the rotor bars; and means for limiting the expansion or movement of the structure radially outward. A method including: providing a structure comprising at least one end ring and rotor bars, wherein at least the end ring comprises a material subject to expansion or movement radially outward from the shaft upon spinning of the structure; assembling a rotor from the structure and a core, the core at least partially enclosing the rotor bars; spinning the rotor in a rotor balancing process; and limiting the expansion or movement of the structure radially outward in the rotor balancing process.

Abstract: A rotor disk for an electric motor including a shaft hole for receiving a shaft of the electric motor, a set of positioning holes around the shaft hole, each configured to receive a positioning pin. The shaft hole and the set of positioning holes are positioned in the rotor disk such that when the rotor disk is set to a rotated position with respect to another similar rotor disk, and the shaft and the positioning pins are penetrated to the respective holes of the two rotor disks, the disks cause a pressing force to the shaft.

Abstract: The invention relates to a rotor that exhibits a rotor shaft, by which a rotor axis is defined, and also a core stack that is arranged around the rotor shaft along a longitudinal portion of the rotor axis. Along the longitudinal portion the rotor shaft exhibits a first surface region, the shape of which describes a circular cylinder, and also a second surface region which is constituted by structural elements that with respect to the rotor axis rise radially outwardly above the first surface region. For the purpose of producing the rotor, the core stack can be pushed over the rotor shaft and in the process can be pushed against the structural elements) in such a manner that it is deformed and by this means a positive connection between the rotor shaft and the core stack is generated. In this way, in particularly simple manner in terms of production engineering a reliable and torsion-proof connection between the core stack and the rotor shaft can be formed.

Abstract: In an electric motor 11, a rotary shaft 12 has an outer circumferential surface 21 with a diameter that decreases from a larger diameter section 17 having a first diameter toward a smaller diameter section 18 having a second diameter smaller than the first diameter. A sleeve 13 is mounted by interference fit with an inner circumferential surface 22 with a diameter that decrease from a front end adjoining the larger diameter section 17 toward a rear end adjoining the smaller diameter section 18, to the outer circumferential surface 21 of the rotary shaft 12. With such a construction, the sleeve 13 is fitted with the substantially entire surface of the inner circumferential surface 22 to the outer circumferential surface 21 of the rotary shaft 12.

Abstract: An arrangement to ensure an air gap in an electrical machine is provided. The electrical machine has a stator arrangement and a rotor arrangement, wherein an air gap is defined by a distance between parts of the rotor arrangement and parts of the stator arrangement. A cross section of the air gap changes along the certain length. The stator arrangement includes a stator support structure and a lamination stack, wherein the stator support structure has support elements for a two-sided support of the lamination stack, the support elements being ring-shaped and connected via a single main bearing to the rotor arrangement. Elements of the ring-shaped support element show different diameters in reference to the longitudinal axis. A first diameter of a first element of the ring-shaped support element is greater than a second diameter of a second element of the ring-shaped support-element.

Abstract: A generator motor includes a flange, stationary-side members, rotor-side members, and latching members. The flange is removably mounted on a first end side in an axial direction. The stationary-side members are fixed on a second end side that is on an opposite side from the first end side in the axial direction. The rotor-side members are configured to move toward the first end side in the axial direction with respect to the stationary-side members in a state in which the flange has been removed. The latching members are configured to restrict relative movement of the flange in the axial direction with respect to the rotor-side members.

Abstract: A rotor for a rotary electric machine includes: a rotor shaft that is rotatably supported; and a rotor core that has a shaft hole in a central portion of the steel sheet stack, and that is tightened and fixed by thermal shrink fitting to a periphery of the rotor shaft inserted in the shaft hole, and that is made up of a stack of steel sheets. The rotor shaft has a reduced-interference portion at a position that corresponds to an end region of the rotor core in an axis direction of the rotor core, in a contact region of the rotor shaft which contacts an inner peripheral portion of the shaft hole of the rotor core.

Abstract: In an electric motor 11, a rotary shaft 12 has an outer circumferential surface 21 with a diameter that decreases from a larger diameter section 17 having a first diameter toward a smaller diameter section 18 having a second diameter smaller than the first diameter. A sleeve 13 is mounted by interference fit with an inner circumferential surface 22 with a diameter that decrease from a front end adjoining the larger diameter section 17 toward a rear end adjoining the smaller diameter section 18, to the outer circumferential surface 21 of the rotary shaft 12. With such a construction, the sleeve 13 is fitted with the substantially entire surface of the inner circumferential surface 22 to the outer circumferential surface 21 of the rotary shaft 12.

Abstract: An electrical rotating machine rotor, in particular for a motor vehicle, comprising a central shaft, an annular core coaxial with the shaft and two polar wheels which are axially arranged on either side of the core, of the type wherein the shaft includes at least one drive section which is axially force-fitted into a fixing bore of at least one component of the rotor so as to secure in rotation at least one of the two polar wheels of the rotor to the shaft, an intermediate sleeve being radially interposed between each polar wheel and the central shaft, and on which sleeve is mounted said polar wheel. The invention also concerns a method for making such a rotor.

Abstract: Disclosed is a washing machine which includes a tub which holds laundry, a drum which is disposed in and rotates within the tub, a stator which is fixed to the tub, and a rotor which is fixed to the drum. The rotor includes a frame, a bushing installed on the frame, a motor shaft having an end which is inserted in and fixed to the bushing, a bearing interposed between the motor shaft and the tub, and at least one guide disposed between the motor shaft and the bushing at an end of the bushing.

Abstract: A brushless motor has a stator, a rotor rotatably disposed in an inner circumferential portion of the stator, and a resolver configured to detect a rotational position of the rotor with respect to the stator. The resolver has a resolver stator disposed at a fixed circumferential position with respect to the stator, and a resolver rotor disposed at a fixed circumferential position with respect to the rotor.

Abstract: The invention relates to a rotor that exhibits a rotor shaft, by which a rotor axis is defined, and also a core stack that is arranged around the rotor shaft along a longitudinal portion of the rotor axis. Along the longitudinal portion the rotor shaft exhibits a first surface region, the shape of which describes a circular cylinder, and also a second surface region which is constituted by structural elements that with respect to the rotor axis rise radially outwardly above the first surface region. For the purpose of producing the rotor, the core stack can be pushed over the rotor shaft and in the process can be pushed against the structural elements) in such a manner that it is deformed and by this means a positive connection between the rotor shaft and the core stack is generated. In this way, in particularly simple manner in terms of production engineering a reliable and torsion-proof connection between the core stack and the rotor shaft can be formed.

Abstract: A rotor (100) for an electric motor (1000). The rotor (100) has a rotor shaft (10) and a rotor core (20) attached onto the rotor shaft (10). The rotor core has a plurality of core laminations (40, 140) arranged along an axis (A) of the rotor core (20), and has a plurality of poles of at least one pole pair, the core lamination (40, 140) having: a central recess (70, 170) through which the rotor shaft (10) passes and which has a contour (71, 171) as well as adjacent areas (AF), and a plurality of receiving structures arranged at peripheral angular positions in order to each form a receiving element for a pole-forming element on the rotor core (20).

Abstract: A rotor for an electric rotating machine is provided. The rotor includes a shaft and a core which is fastened to an outer periphery surface of the shaft by shrink fitting. The shaft includes a fastening portion to which the core is fastened. A diameter of the fastening portion is smaller than a diameter of at least one other portion of the shaft.

Abstract: A rotor for an electric machine having a number of poles includes a shaft that extends along a portion of an axis and defines an outer surface. A first core portion is formed as a single inseparable component and includes a first portion that extends from the outer surface to a first outside diameter to define a first thickness, and a second portion spaced axially from the first portion that includes a reduced back portion that extends from an inside diameter to the first outside diameter to define a second thickness that is less than the first thickness. A second core portion is connected to the first core portion and includes a second outside diameter that is substantially the same as the first outside diameter.

Abstract: An electric motor, including stator core, a shaft, and a shock-absorbing connector including multiple brackets, and a rubber pad. The stator core and the shaft are disposed between the brackets, the shaft is nested in the stator core but not directly mechanically-connected thereto, tightly abuts against the bracket, and passes through the stator core. A through hole is disposed in the stator core and parallel to the shaft, and the rubber pad is received in the through hole.

Abstract: A rotor for a vehicular alternating current generator has a relief space portion formed between axial holes of a pair of pole cores and a shaft for receiving therein a plastically deformed portion produced when the shaft is press-fitted in the axial holes of the pole cores. The relief space portion is located adjacent to a pair of closely contacting inner end faces of the pole cores so that the plastically deformed portion is let to move into a radially outward direction rather than further continuing movement in an axial direction within the relief space portion. The plastically deformed portion is thus prevented from entering between the inner end faces of the pole cores.

Abstract: In a manufacturing method of a rotor for an electric motor including: a core (4) formed of stacked steel plates, each of which has a center hole (4a); and a shaft (3) inserted through the center hole (4a) of the core (4), the shaft (3) is deformed to fit a second end plate (2) in a state where the second end plate (2) is pressed against the core (4), and a deformed portion (3e) of the shaft (3) that engages with an edge (2a, 2b) of the second end plate (2) is deformed along a core-side edge portion (2a) and a no core-side edge portion (2b) of the edge (2a, 2b) of the second end plate (2) so that the deformed portion (3e) is deformed into the deformed shape that fits the shape of the edge (2a, 2b) of the second end plate (2).

Abstract: The present invention relates to a method for manufacturing a shaft-hub component (1) having a shaft (2), a hub component (3; 10; 11; 12) and a shaft-hub connection for an armature of an electrical machine, comprising the steps: hardening of the shaft (2) at least on the outer lateral surface (6) of said shaft (2), shaping of the hardened shaft (2) such that a partial region (L1; L2; L3; L4) of said shaft (2) is shaped in such a manner that at least one radially projecting section (4) and one radially indented section (5) are produced and joining of said shaped shaft (2) and the hub component (3, 10, 11, 12) to the shaft-hub component so that said shaft-hub connection includes an interference fit at the projecting section (4), a hardness of said hub component (3; 10; 11; 12) being less than a surface layer hardness of said shaft (2). The invention further relates to a shaft-hub component for an armature of an electrical machine.

Abstract: It is an object of the present invention to provide a rotor shaft capable of sufficiently securing a fastening strength between an inner shaft and an outer shaft, obtaining an excellent anti-rotation torque, and reducing a weight of the rotor shaft. A rotor shaft 3 is divided into an inner shaft 4 and an outer shaft 5. The inner shaft 4 includes a tip end portion 41, a rear end portion 43, and a thick portion 42. The thick portion 42 connects the tip end portion 41 and the rear end portion 43 with each other in the radial direction, and has the same inner diameter as that of the tip end portion 41 and the same outer diameter as that of the rear end portion 43. The outer shaft 5 includes an inner cylindrical portion 51, a magnetic body-mounting outer cylindrical portion 53, and a flange 52 that connects the inner cylindrical portion 51 and the magnetic body-mounting outer cylindrical portion 53 with each other.

Abstract: An electric motor includes a stator including stator steel core (11) around which a coil is wound; a rotor which includes rotating body (30) that holds a plurality of permanent magnets (32) in the circumferential direction to face the stator, and shaft (16) that fastens rotating body (30) so as to penetrate the center of rotating body (30); a bearing (15) for supporting shaft (16); and bracket (17) for fixing bearing (15), wherein dielectric layer (50) is provided between shaft (16) and the outer periphery of rotating body (30).

Abstract: A rotor shaft (200) for a magnetic bearing device (1) is disclosed. The shaft comprises an inner portion on whose periphery a plurality of targets (240, 260, 280) separated by spacers (250, 270) are mounted. This is achieved exerting an axial pressing force (F, F?) to the peripheral parts, rather than applying a radial press fit. In this manner, a simplified construction, a higher stiffness and a higher stability at high rotational speed are achieved. Further disclosed is a rotor having a thrust disk (220) whose diameter decreases towards the periphery. This allows to use a larger thrust disk at a given rotational speed.

Abstract: A motor, including at least a stator core (1), a shaft (2) nested around the stator core (1), and shock-absorbing connector, wherein the shock-absorbing connector is disposed between the stator core (1) and the shaft (2) so as to absorb and buffer unbalanced counterforces acting on the stator core (1) and to dampen the shocks experienced by the shaft (2) and reduce the overall noise generated by the motor.

Abstract: Certain exemplary embodiments comprise a device and/or an electric motor comprising an elongated, substantially rigid rotor shaft, the rotor shaft defining a plurality of longitudinal flutes; and/or a method comprising: for an electrical motor, forming an elongated, substantially rigid, rotor shaft defining a plurality of longitudinal flutes; and assembling the rotor shaft with a stator of the electrical motor.

Abstract: In a motor, an upper surface of a flange portion of a shaft is arranged axially below a bottom end surface of a rotor core. A spacer having an axial thickness slightly greater than that of the flange portion is arranged on a radially outer side of the flange portion. A bottom surface of the spacer makes contact with an end plate whose inner circumferential surface has a radius, centered about a central axis, smaller than a radius of the flange portion. The end plate is secured to the rotor core via a fixing member.