Abstract: A motor includes a shaft with a central axis along an up and down direction as a center, a bearing mechanism rotatably supporting the shaft; a cylindrical rotor main body fixed to the shaft; a rotor fan fixed to the shaft at an upper side of the rotor main body; an armature facing the rotor main body in a radial direction; and a housing accommodating the rotor main body, the rotor fan, and the armature therein. The bearing mechanism includes a first bearing above the rotor fan in the housing and facing the rotor fan in the up and down direction and a second bearing positioned below the rotor main body. The housing includes a first opening, a second opening, and a bearing holding portion.

Abstract: A motor includes a shaft centered on a center axis oriented in a vertical direction, a bearing rotatably supporting the shaft, an armature disposed radially outward of the bearing, a bracket to which the bearing and the armature are fixed, and a covered cylindrical rotor connected to the shaft. The rotor includes a disk-shaped rotor lid portion connected to the shaft, and a rotor side wall portion extending downward from an outer edge of the rotor lid portion. The shaft is made of metal. The rotor lid portion and the rotor side wall portion are made of resin. The rotor lid portion and the shaft are an integrally molded article.

Abstract: A rotor blade apparatus includes a motor and a propeller. The motor includes a motor body having a rotor that rotates about a central axis, and an output part that is connected to the rotor and protrudes from the motor body to one side in an axial direction. The propeller is fixed to one axial end of the output part. The propeller has a flat portion that spreads in a direction orthogonal to the axial direction at a radially inner portion that faces a surface of the motor body facing one side in the axial direction. The rotor blade apparatus includes a fan that is provided between the flat portion and the motor body and is fixed to the output part. At least one blade of the fan faces the propeller in the axial direction with a gap.

Abstract: A fluid heating ceramic heater can suppress adhesion of scale to a surface of the ceramic heater over an extended time period, and efficiently conduct heat generated from a heat generation resistor to fluid. The ceramic heater has a ceramic body, an outer coating layer and an inner coating layer. The ceramic body has a heat generation resistor. The outer coating layer and the inner coating layer contain glass as a main component and coat a surface of the ceramic body. The outer coating layer and the inner coating layer are formed so that the inner coating layer is thinner than the outer coating layer.

Abstract: Provided is a motor including a shaft; two rotors attached to the shaft and spaced from each other in an axial direction by a predetermined distance; a stator arranged between the two rotors; a busbar unit arranged on one axial side of at least one of the two rotors, and arranged to hold a busbar; and a housing arranged to hold the stator and house the two rotors therein. The stator includes a plurality of cores arranged in a circumferential direction, and coils wound around the cores. A lead wire drawn out from the coils is arranged to extend, radially outside of the one of the rotors, from the corresponding core to a position on the one axial side of the one of the rotors, and is connected to the busbar at the position. The busbar unit is housed in the housing.

Abstract: A motor includes a shaft with a central axis along an up and down direction as a center, a cylindrical rotor main body fixed to the shaft, a rotor fan fixed to the shaft at an upper side of the rotor main body, an armature facing the rotor main body in a radial direction, a bus bar electrically connecting the armature to an external power supply, a bus bar holding portion that holds the bus bar, and a housing that accommodates the rotor main body, the rotor fan, the armature, the bus bar, and the bus bar holding portion therein. The housing includes a first opening positioned above the armature and a second opening below the armature in the up and down direction. The bus bar holding portion is disposed outward the rotor fan in the radial direction.

Abstract: A motor includes a shaft, a bearing mechanism rotatably supporting the shaft, a cylindrical rotor main body fixed to the shaft, a rotor fan fixed to the shaft, an armature, and a housing. The bearing mechanism includes a first bearing above the rotor fan in the housing and facing the rotor fan in an up and down direction. The housing includes a first opening, a second opening, and a bearing holding portion. A cylindrical wind tunnel portion is outward of the rotor fan in a radial direction. An inner surface of the wind tunnel portion and the rotor fan face each other in the radial direction. An upper end portion of the inner surface of the wind tunnel portion and an outer surface of the bearing holding portion face each other in the radial direction.

Abstract: An object of the present invention is to suppress adhesion of scale to a surface of a ceramic heater that is used for fluid heating. The ceramic heater has a ceramic body and a coating layer. The ceramic body has a heat generation resistor. The coating layer contains glass as a main component and is formed so as to coat a surface of the ceramic body. The coating layer has a function of smoothing the surface of the ceramic body.

Abstract: Provided is a motor including a shaft; two rotors attached to the shaft and spaced from each other in an axial direction by a predetermined distance; a stator arranged between the two rotors; a busbar unit arranged on one axial side of at least one of the two rotors, and arranged to hold a busbar; and a housing arranged to hold the stator and house the two rotors therein. The stator includes a plurality of cores arranged in a circumferential direction, and coils wound around the cores. A lead wire drawn out from the coils is arranged to extend, radially outside of the one of the rotors, from the corresponding core to a position on the one axial side of the one of the rotors, and is connected to the busbar at the position. The busbar unit is housed in the housing.

Abstract: The rotating electric motor includes a stator including a stator coil and a stator core, and a rotor located at an inner peripheral side of the stator core and rotatable relative to the stator. The rotor includes a rotor core provided at an outer periphery of a rotor rotation shaft via a core support portion. The rotor core has a plurality of magnetic poles in which a plurality of sets of permanent magnets are provided along a circumferential direction. The rotor core includes a plurality of rotor core divided bodies that are aligned in an axial direction, concentrically arranged, and shifted in phase from each other by a determined angle. A pair of grooves are provided on an outer peripheral portion of each rotor core divided body to be spaced apart from each other in the circumferential direction with a center of each magnetic pole.

Abstract: Provided is a motor including a shaft; two rotors attached to the shaft and spaced from each other in an axial direction by a predetermined distance; a stator arranged between the two rotors; a busbar unit arranged on one axial side of at least one of the two rotors, and arranged to hold a busbar; and a housing arranged to hold the stator and house the two rotors therein. The stator includes a plurality of cores arranged in a circumferential direction, and coils wound around the cores. A lead wire drawn out from the coils is arranged to extend, radially outside of the one of the rotors, from the corresponding core to a position on the one axial side of the one of the rotors, and is connected to the busbar at the position. The busbar unit is housed in the housing.

Abstract: A motor includes a shaft centered on a center axis oriented in a vertical direction, a bearing supporting the shaft, an armature disposed radially outward of the bearing, a bracket to which the bearing and the armature are fixed, and a covered cylindrical rotor connected to the shaft. The rotor includes a rotor lid portion connected to the shaft, a rotor side wall portion extending downward from an outer edge of the rotor lid portion, a blower plate portion connected to a lower surface of the rotor lid portion and extending radially outward from a center portion of the rotor lid portion, an inlet disposed radially outward of the cylindrical portion and penetrating the bracket, and an outlet disposed radially outward of the blower plate portion and radially penetrating the rotor.

Abstract: A motor includes a shaft, a bearing, an armature disposed radially outward of the bearing, a bracket, a rotor, and a circuit board on which a Hall element is mounted. The rotor includes a rotor magnet radially opposed to the armature radially outward of the armature. The bracket includes a cylindrical portion including an outer peripheral surface to which the armature is fixed, a bracket bottom portion extending radially outward from a lower end portion of the cylindrical portion, a bracket side wall portion extending upward from an outer peripheral portion of the bracket bottom portion, and a board holding portion connected to the bracket side wall portion. The circuit board is held by the board holding portion. The Hall element is held by the bracket side wall portion.

Abstract: A motor includes a shaft centered on a center axis oriented in a vertical direction, a bearing rotatably supporting the shaft, an armature disposed radially outward of the bearing, a bracket to which the bearing and the armature are fixed, and a covered cylindrical rotor connected to the shaft. The rotor includes a disk-shaped rotor lid portion connected to the shaft, and a rotor side wall portion extending downward from an outer edge of the rotor lid portion. The shaft is made of metal. The rotor lid portion and the rotor side wall portion are made of resin. The rotor lid portion and the shaft are an integrally molded article.

Abstract: A stator core includes an annular core back and teeth extending radially from the core back to a rotor magnet includinq magnets. A ratio of a number of slots, which is equal to a number of the teeth, to a number of poles, which is equal to a number of magnets of the rotor magnet, is 3:4. A slot open ratio, which is a ratio of a slot open angle between two adjacent teeth in a peripheral direction to an angle between center lines of the two teeth is 0.5 or more. When a ratio of a peripheral angle of one magnet to an angle between center positions of two adjacent magnets in the peripheral direction is a magnet ratio, a ratio of the slot open ratio to the magnet ratio is 0.6 to 0.7.

Abstract: A motor includes a shaft, a bearing, an armature, a bracket, and a covered cylindrical rotor including a rotor lid portion, a rotor side wall portion, and a rotor magnet. The bracket includes a cylindrical portion. The bearing includes lower and upper ball bearings. The shaft includes a shaft main body and a nut. In the lower ball bearing, a lower surface of an inner ring is in contact with an upper surface of the nut and an upper surface of an outer ring is vertically supported by the cylindrical portion. In the upper ball bearing, an inner ring is vertically fixed with respect to the shaft main body and a lower surface of an outer ring is vertically supported by the cylindrical portion.

Abstract: A motor includes a shaft, a bearing supporting the shaft, an armature disposed radially outward of the bearing, a bracket to which the bearing and the armature are fixed, a covered cylindrical rotor connected to the shaft, and a bus bar unit. The armature includes a core back, teeth extending radially outward from the core back portion, an insulator covering surfaces of the teeth, and a coils defined by a wire wound from above the insulator round the teeth. The bus bar unit includes bus bars to which the coils are connected, a bus bar holder holding the bus bars, and a bus bar cover covering portion of the bus bars.

Abstract: A motor includes a shaft, a bearing supporting the shaft, an armature disposed radially outward of the bearing, a bracket to which the bearing and the armature are fixed, and a rotor connected to the shaft. The bracket includes a bracket bottom portion covering a lower side of the armature, and a terminal holding portion extending radially outward from an outer peripheral portion of the bracket bottom portion. The terminal holding portion includes a plate-shaped holding portion main body connected to the outer peripheral portion of the bracket bottom portion, a terminal disposed on an upper surface of the holding portion main body, and a protrusion portion projecting downward from a lower surface of the holding portion main body at a same position in a radial direction as that of the terminal, or radially outward of the terminal.

Abstract: A motor includes a shaft with a central axis along an up and down direction as a center, a bearing mechanism rotatably supporting the shaft; a cylindrical rotor main body fixed to the shaft; a rotor fan fixed to the shaft at an upper side of the rotor main body; an armature facing the rotor main body in a radial direction; and a housing accommodating the rotor main body, the rotor fan, and the armature therein. The bearing mechanism includes a first bearing above the rotor fan in the housing and facing the rotor fan in the up and down direction and a second bearing positioned below the rotor main body. The housing includes a first opening, a second opening, and a bearing holding portion.

Abstract: A rotor assembly includes a shaft including a non-magnetic material and a central axis extending along an up and down direction as a center, and a cylindrical rotor main body fixed to an outer surface of the shaft. The rotor main body includes core pieces arranged around the shaft in a circumferential direction, rotor magnets alternately arranged with the core pieces around the shaft in the circumferential direction, and a connection portion made of resin and connecting the shaft to the core pieces and the rotor magnets. Inner ends of the rotor magnets in a radial direction are closer to the shaft than inner ends of the core pieces in the radial direction.