Abstract: The motor comprises an internal rotor having an external lob; an external rotor outside the internal rotor and having an internal lob engaging the external lob; and an inlet port and an outlet port. An inner diameter of the inlet port is less than a diameter of a dedendum circle of the internal rotor, and an outer diameter of the inlet port is greater than a diameter of a dedendum circle of the external rotor. An inner diameter of the outlet port equals the diameter of the dedendum circle of the internal rotor. An outer diameter of the outlet port equals the diameter of the dedendum circle of the external rotor. The inner diameter of the inlet port is less than the inner diameter of the outlet port. The outer diameter of the inlet port is greater than the outer diameter of the outlet port.

Abstract: A pump module may include a pump rotor coupled to a rotating shaft of a motor, and a pump housing configured to accommodate the pump rotor. The pump housing includes a rotor accommodating part having an insertion groove formed therein to accommodate the pump rotor, and a cover connected with the rotor accommodating part and having a fluid sucking hole and a fluid discharging hole.

Abstract: An electric pump includes a motor unit including a stator, a rotor core disposed inside the stator and a shaft coupled to the rotor core; a first pump unit and a second pump unit which are coupled using the shaft as a coaxial axis; a first housing in which a motor housing receiving the motor unit and a pump housing including a first pump accommodating part are integrally formed, the first pump unit being inserted in the first pump accommodating part; a second housing coupled to the first housing to cover the first pump accommodating part and including a second pump accommodating part in which the second pump unit is inserted; and a cover unit coupled to the second housing to cover the second pump accommodating part.

Abstract: The motor comprises an internal rotor having an external lob; an external rotor outside the internal rotor and having an internal lob engaging the external lob; and an inlet port and an outlet port. An inner diameter of the inlet port is less than a diameter of a dedendum circle of the internal lob, and an outer diameter of the inlet port is greater than a diameter of a dedendum circle of the external lob. An inner diameter of the outlet port equals the diameter of the dedendum circle of the internal lob. An outer diameter of the outlet port equals the diameter of the dedendum circle of the external lob. The inner diameter of the inlet port is less than the inner diameter of the outlet port. The outer diameter of the inlet port is greater than the outer diameter of the outlet port.

Abstract: The electric pump of the present application includes a motor unit including a stator, a rotor core disposed inside the stator and a shaft coupled to the rotor core; a pump unit including an internal rotor coupled to the shaft and having an external lob formed thereon and an external rotor disposed outside the internal rotor and having an internal lob formed to be engaged with the external lob; a housing unit including a motor housing including the motor unit and a pump housing connected to the motor housing and having a pump accommodating part, in which the pump unit is inserted, formed therein; and a cover unit coupled to the housing unit to cover the pump accommodating part.

Abstract: The electric pump of the present application includes a motor unit including a stator, a rotor core disposed inside the stator and a shaft coupled to the rotor core; a pump unit including an internal rotor coupled to the shaft and having an external lob formed thereon and an external rotor disposed outside the internal rotor and having an internal lob formed to be engaged with the external lob; a housing unit including a motor housing including the motor unit and a pump housing connected to the motor housing and having a pump accommodating part, in which the pump unit is inserted, formed therein; and a cover unit coupled to the housing unit to cover the pump accommodating part.

Abstract: An electric pump includes a motor unit including a stator, a rotor core disposed inside the stator and a shaft coupled to the rotor core; a first pump unit and a second pump unit which are coupled using the shaft as a coaxial axis; a first housing in which a motor housing receiving the motor unit and a pump housing including a first pump accommodating part are integrally formed, the first pump unit being inserted in the first pump accommodating part; a second housing coupled to the first housing to cover the first pump accommodating part and including a second pump accommodating part in which the second pump unit is inserted; and a cover unit coupled to the second housing to cover the second pump accommodating part.

Abstract: A pump module may include a pump rotor coupled to a rotating shaft of a motor, and a pump housing configured to accommodate the pump rotor. The pump housing includes a rotor accommodating part having an insertion groove formed therein to accommodate the pump rotor, and a cover connected with the rotor accommodating part and having a fluid sucking hole and a fluid discharging hole.

Abstract: A spindle motor is disclosed, the spindle motor including a case including a lateral wall unit formed with a hollow hole, and a support unit extended to an inner side of a distal end of the lateral wall unit, a clamper arranged inside the lateral wall unit and supported by the support unit for clamping an upper surface of the optical disc, a cover plate covering the clamper, and an elastic member interposed between the clamper and the cover plate to apply a pressure to the clamper to a direction facing the upper surface of the optical disc.

Abstract: A spindle motor is disclosed, wherein a coupling protruder of a stopper is penetrated into a rotor yoke by caulking. Therefore, no foreign objects that are generated from welding process are produced to inhibit the spindle motor from generating defects caused by the foreign objects and to improve the product reliability. Furthermore, the coupled protruder of the stopper is coupled to the rotor yoke by caulking, to make an assembly process simple. Still furthermore, the spindle motor according to the present invention is economical in that, in a case the coupled stopper is to be separated from the rotor yoke, the coupled stopper and the rotor yoke can be simply separated by cutting off a caulked portion of the coupled protruder, thereby allowing the rotor yoke to be re-used.

Abstract: A spindle motor is disclosed, wherein the spindle motor is formed at an outer periphery of a first protruder of a bearing housing having a gap relative to the inner periphery of the coupling hole of a base with a guide portion contacting an inner periphery of a coupling hole, whereby, the bearing housing is not moved on the base by the guide portion, and whereby the bearing housing is always coupled to a predetermined area of the base, such that when the base assembled with parts is coupled to the product, the parts are always positioned at a predetermined area of the product, thereby improving product reliability.

Abstract: Disclosed is a clamping apparatus including a case having a side surface on which a plurality of arm holes are formed; an arm, which moves inside and outside the case through one of the arm holes while being restricted by the case and has an upper part and a lower part that are guided by the case; and an elastic member installed inside the case to elastically support the arm.

Abstract: A turntable of a recording medium drive can include a coupler having an inner circumference to which a rotating shaft is fixed, and an outer circumference onto which a disk is inserted; a table extending outwardly from the outer circumference of the coupler and for mounting the disk thereon; and first and second claws elastically supporting the disk by making contact with a clamping region of the disk. In an embodiment, the distance from the center of the rotating shaft to an outer surface of the first claws making contact with the clamping region of the disk is longer than the distance from the center of the rotating shaft to an outer surface of the second claw making contact with the clamping region of the disk.

Abstract: A disk clamping apparatus of a spindle motor and a spindle motor having the same are disclosed, wherein the apparatus includes a case inserted into an inner periphery of a disk for integrally rotating with a rotation shaft coupled with a rotor yoke, a plurality of claws each formed at a predetermined gap in the case, an arm mounted between the claws in the case and having a body with a slanted surface and slantedly formed at an upper surface of the disk, guide rails each mounted at both lateral surfaces of the body and a disengagement prevention rails each mounted at each guide rail and curvedly formed at the bottom surface for contacting the rotor yoke, and an elastic member elastically supporting the body by being interposed between the body and the case.

Abstract: A turntable of a recording medium drive can include a coupler having an inner circumference to which a rotating shaft is fixed, and an outer circumference onto which a disk is inserted; a table extending outwardly from the outer circumference of the coupler and for mounting the disk thereon; and first and second claws elastically supporting the disk by making contact with a clamping region of the disk. In an embodiment, the distance from the center of the rotating shaft to an outer surface of the first claws making contact with the clamping region of the disk is longer than the distance from the center of the rotating shaft to an outer surface of the second claw making contact with the clamping region of the disk.

Abstract: A spindle motor is disclosed, wherein a coupling protruder of a stopper is penetrated into a rotor yoke by caulking. Therefore, no foreign objects that are generated from welding process are produced to inhibit the spindle motor from generating defects caused by the foreign objects and to improve the product reliability. Furthermore, the coupled protruder of the stopper is coupled to the rotor yoke by caulking, to make an assembly process simple. Still furthermore, the spindle motor according to the present invention is economical in that, in a case the coupled stopper is to be separated from the rotor yoke, the coupled stopper and the rotor yoke can be simply separated by cutting off a caulked portion of the coupled protruder, thereby allowing the rotor yoke to be re-used.

Abstract: A spindle motor is disclosed, wherein the spindle motor is formed at an outer periphery of a first protruder of a bearing housing having a gap relative to the inner periphery of the coupling hole of a base with a guide portion contacting an inner periphery of a coupling hole, whereby, the bearing housing is not moved on the base by the guide portion, and whereby the bearing housing is always coupled to a predetermined area of the base, such that when the base assembled with parts is coupled to the product, the parts are always positioned at a predetermined area of the product, thereby improving product reliability.

Abstract: A clamping device of a spindle motor is so formed as to allow an inclination supporting a disk by being in contact with an inner upper circumferential edge of the disk mounted on a rotor yoke to form an angle of 52°˜55°, whereby the disk is not separated from the clamping device by a shock of less than a predetermined size, thereby enhancing the reliability of product.

Abstract: Disclosed is a clamping apparatus including a case having a side surface on which a plurality of arm holes are formed; an arm, which moves inside and outside the case through one of the arm holes while being restricted by the case and has an upper part and a lower part that are guided by the case; and an elastic member installed inside the case to elastically support the arm.

Abstract: A spindle motor can include a base; a bearing housing supported on the base and having a bearing therein; a rotating shaft rotatably supported by the bearing; a stator installed around the bearing housing and having a core and a coil; and a rotor coupled with the rotating shaft and including a rotor yoke supported on a top surface of the rotating shaft and a magnet supported by the rotor yoke.