The present invention relates to an in-wheel motor driving apparatus for reducing weight, improving Hall sensor assembly performance, and reducing a defect rate. According to one embodiment of the present invention, the weight of an in-wheel motor can be reduced by separating a suspension housing and a shaft and applying different materials thereto. Furthermore, the ease of assembling a Hall sensor can be improved, and the defect rate can be reduced.

The present invention relates to an in-wheel motor. The in-wheel motor according to an embodiment of the present invention includes: a circular rim to which a tire is coupled by being wrapped around an outer ring thereof and a shaft is connected by passing through a center thereof; a motor assembly which is disposed in an inner portion of the rim and includes a stator connected to the shaft and a rotor disposed to be wrapped around the stator and configured to rotate; a cover coupled to cover one open side surface of the rim and configured to seal the inner portion of the rim; and a lead-out wire entry/exit portion waterproof structure configured to seal an entry/exit portion for a lead-out wire connected to supply power from outside of the in-wheel motor to the inner portion of the rim via a hollow portion of the shaft, wherein the lead-out wire entry/exit portion waterproof structure includes an elastic stopper, to which the lead-out wire is connected to pass through a center thereof and which is configured to be elastically contracted after being inserted into the hollow portion of the shaft in an axial direction and seal between the hollow portion of the shaft and the lead-out wire, and a stopper fixing body fastened to the shaft and configured to press the elastic stopper in the axial direction so that the elastic stopper is inserted and fixed inside the hollow portion of the shaft.

The present invention relates to an in-wheel motor. The in-wheel motor according to an embodiment of the present invention includes: a circular rim to which a tire is coupled by being wrapped around an outer ring thereof and a shaft is connected by passing through a center thereof; a motor assembly which is disposed in an inner portion of the rim and includes a stator connected to the shaft and a rotor disposed to be wrapped around the stator and configured to rotate; a cover coupled to cover one open side surface of the rim and configured to seal the inner portion of the rim; and a lead-out wire entry/exit portion waterproof structure configured to seal an entry/exit portion for a lead-out wire connected to supply power from outside of the in-wheel motor to the inner portion of the rim via a hollow portion of the shaft, wherein the lead-out wire entry/exit portion waterproof structure includes an elastic stopper, to which the lead-out wire is connected to pass through a center thereof and which is configured to be elastically contracted after being inserted into the hollow portion of the shaft in an axial direction and seal between the hollow portion of the shaft and the lead-out wire, and a stopper fixing body fastened to the shaft and configured to press the elastic stopper in the axial direction so that the elastic stopper is inserted and fixed inside the hollow portion of the shaft.

The present invention relates to fluid pump assemblies in general, and in exemplary embodiments to fluid pump assemblies that are magnetically supported in position, and to related kits and methods useful to circulate water in aquariums. The fluid pump assembly comprises an outer mount, an inner mount, and a pump. The outer mount includes at least one outer permanent magnet; the inner mount includes at least one inner permanent magnet; and the pump includes at least one soft magnetic material. The outer permanent magnet, the inner permanent magnet, and the soft magnetic material collectively form a magnetic circuit.

The present invention relates to fluid pump assemblies in general, and in exemplary embodiments to fluid pump assemblies that are magnetically supported in position, and to related kits and methods useful to circulate water in aquariums. The fluid pump assembly comprises an outer mount, an inner mount, and a pump. The outer mount includes at least one outer permanent magnet; the inner mount includes at least one inner permanent magnet; and the pump includes at least one soft magnetic material. The outer permanent magnet, the inner permanent magnet, and the soft magnetic material collectively form a magnetic circuit.

A cup (28) of a external rotor with symmetry of revolution about the axis comprises: a first cylindrical portion (68) which is radially internal, a second cylindrical portion (32) which is radially external and a third portion (70) between the two cylindrical portions (32, 68). When viewed in cross-section, the third portion (70) extends between two points (P1, P2) which define a straight line which forms, with the axis of the rotor cup (28), an angle (a) of between 65° and 80°. The ratio between the distance (R-P1, R-p2) between the first point (P1, P2) which is radially internal or radially external, respectively, and the axis of symmetry of the rotor cup (28), on the one hand, and the radius (R32) of the second cylindrical portion (32), on the other hand, is between 0.04 and 0.32 or between 0.65 and 1.0, respectively.

A cup (28) of a external rotor with symmetry of revolution about the axis comprises: a first cylindrical portion (68) which is radially internal, a second cylindrical portion (32) which is radially external and a third portion (70) between the two cylindrical portions (32, 68). When viewed in cross-section, the third portion (70) extends between two points (P1, P2) which define a straight line which forms, with the axis of the rotor cup (28), an angle (a) of between 65° and 80°. The ratio between the distance (R-P1, R-p2) between the first point (P1, P2) which is radially internal or radially external, respectively, and the axis of symmetry of the rotor cup (28), on the one hand, and the radius (R32) of the second cylindrical portion (32), on the other hand, is between 0.04 and 0.32 or between 0.65 and 1.0, respectively.

The present disclosure provides distributed drive systems and methods of use thereof A distributed drive system may comprise one or more coils, one or more magnets, and at least one tread. A method for a distributed drive system may comprise the utilization of a plurality of voltage phases. The coils may comprise conductive wiring wrapped in a predefined form. In some embodiments, the coils may alternate in polarity. In some implementations, the coils may be attached directly to the frame of a larger machine or vehicle for uniform heat distribution. The magnets may comprise composite materials with ferrous portions. When the system comprises at least one tread, magnets may be embedded within the tread. In some aspects, the distributed drive system may be contained within a motive system of a machine or vehicle, thereby limiting the need for a transmission between a power source and the motive components of the machine or vehicle.

A configuration of a direct drive lawnmower spindle assembly to protect sensitive electric motor components is provided. A spindle shaft of the spindle assembly is supported by upper and lower bearings. An upper end of the spindle shaft is mounted to a rotor of the electric motor and a lower end of the spindle shaft extends through the clearance opening. The lower bearing is supported by a lower bearing carrier that is mounted to the bottom of the spindle housing. The lower bearing can be serviced by removing the lower bearing carrier. A clearance gap between the spindle shaft and the clearance opening is sufficiently small to limit spindle shaft tipping to a degree that will not damage the motor. The invention also provides a friction coupling system for coupling a blade with the rotating spindle shaft.

A configuration of a direct drive lawnmower spindle assembly to protect sensitive electric motor components is provided. A spindle shaft of the spindle assembly is supported by upper and lower bearings. An upper end of the spindle shaft is mounted to a rotor of the electric motor and a lower end of the spindle shaft extends through the clearance opening. The lower bearing is supported by a lower bearing carrier that is mounted to the bottom of the spindle housing. The lower bearing can be serviced by removing the lower bearing carrier. A clearance gap between the spindle shaft and the clearance opening is sufficiently small to limit spindle shaft tipping to a degree that will not damage the motor. The invention also provides a friction coupling system for coupling a blade with the rotating spindle shaft.