摘要:
An electric motor designed for electric tools. The motor includes a first molded coil having a first coil covered entirely with a resin that is electrically insulating and highly heat conductive. The motor also includes a second molded coil having a second coil covered entirely with the resin. The first molded coil has a pair of first axial portions, and the second molded coil has a pair of second axial portions in alignment with the first axial portions. A stator core disposed around the molded coils includes a first stator core and a second stator core with first stator core legs and second stator core legs, respectively. Air paths through which fan airflow passes are formed between the axial portions and the opposing stator core legs.
摘要:
An electric motor designed for electric tools. The motor includes a first molded coil having a first coil covered entirely with a resin that is electrically insulating and highly heat conductive. The motor also includes a second molded coil having a second coil covered entirely with the resin. The first molded coil has a pair of first axial portions, and the second molded coil has a pair of second axial portions in alignment with the first axial portions. A stator core disposed around the molded coils includes a first stator core and a second stator core with first stator core legs and second stator core legs, respectively. Air paths through which fan airflow passes are formed between the axial portions and the opposing stator core legs.
摘要:
An electric motor designed for electric tools. The motor includes a stator core having a first stator core and a second stator core. The motor includes a first molded coil having a first coil covered entirely with a thermosetting resin that is electrically insulating and highly heat conductive. The motor also includes a second molded coil having a second coil covered entirely with the thermosetting resin. The first coil and the first stator core are integrally firmly fixed together by the thermosetting resin which is injected in a metal mold to cover the entire first coil after the first stator core and the first coil mounted on the first coil mounting portion are fixed to the metal mold. Similarly, the second coil and the second stator core are integrally firmly fixed together by the thermosetting resin.
摘要:
A disk motor including: a rotor; a stator; an output shaft concentrically fixed to the rotor; at least one coil disk which is provided to one of the rotor or the stator, a coil pattern which includes a plurality of radial patterns or radial pattern groups extending outwards in a radial direction from a center part of the coil disk being formed on at least one surface of the coil disk; an electric current supply portion which supplies electric current to the coil pattern; a magnetic flux generating portion which is provided to another of the rotor or the stator and faces the coil pattern; and an intermediate pattern which is formed between adjacent radial patterns or adjacent radial pattern groups on the coil disk.
摘要:
A disc motor includes an output shaft, a coil disc, an electric current supplying section, and a magnet. The coil disc is disc-shaped. The coil disc includes a first coil and a second coil. The first coil has a plurality of first partial coil sections radiating outward in a radial direction of the output shaft and first connecting sections each connecting two first partial coil sections. The second coil has a plurality of second partial coil sections radiating outward in the radial direction and second connecting sections each connecting two second partial coil sections. The total number of the first partial coil sections is different from that of the second partial coil sections. The electric current supplying section is configured to supply electric current to the coil disc. The magnet is disposed in opposition to the first and second partial coil sections.
摘要:
A controller controls a first FET to go on and off based on an input signal of a trigger switch and a push switch and controls a second FET to go on and off based on an input signal of a trigger switch, a push switch, and a operation detection switch. The controller then controls the time that the first FET is on for to be longer than the time the second FET is on for.
摘要:
An impact tool including: a motor; a hammer connected to the motor; and an anvil struck by the hammer by driving the motor alternately in a normal rotation and a reverse rotation, wherein a magnitude of a fastening torque by the anvil is calculated in accordance with a current value of a current supplied to the motor immediately after the striking.
摘要:
A fastener driving tool providing a prolonged durability and stabilized fastener driving operation. The tool includes a housing 2, a motor 31 disposed in the housing 2, a plunger 63 disposed in the housing and driven by the motor 31 for driving a nail 1A, a cable member 52 connected to the plunger 63 for pulling the plunger 63 from its bottom dead center where the nail is driven into a workpiece to a top dead center, and a drum 51 driven by the motor for winding the cable member thereover. A cable member is wound over the drum by a length greater than a linear distance between the bottom dead center and the top dead center. The cable member is flexed or deflected due to own weight when the plunger is at the bottom dead center.
摘要:
An object of the present invention is to effectively cool the generation of heat of a resin molding armature, especially to effectively cool the generation of heat of a coil in an electric motor having a resin molding armature and in an electric tool into which the electric motor is incorporated. In order to effectively cool the generation of heat of a resin molding armature 2a, especially in order to effectively cool the generation of heat of a coil 2e, an open groove 2j is provided for each slot 2g on an outer circumferential face of a molding resin filling layer 9a, which is filled into the slot 2g of a core 2f, in which the coil 2e is embedded. A molding die used for forming a molding resin filling layer 9a is made up of four members which can be split in four sliding directions (in the radial direction of the core).
摘要:
A portable electric cutting device includes housing, a saw blade, a saw cover, a base linked to the housing, and a centrifugal fan. The saw cover has a partition wall formed with a plurality of division walls including front and rear divisional walls. The plurality of division walls have an inclined part that extends at an angle with respect to a radial direction of the rotary axis of the fan such that a radially outer part of the inclined part locates upstream from a radially inner part of the inclined part with respect to the rotary direction of the fan.