摘要:
A motor comprises a magnet formed in a cylindrical shape and divided in the circumferential direction in at least the outer periphery and alternately polarized to different poles, a first coil, a magnet and a second coil placed in the axial direction of the magnet, a first outer magnetic pole opposed to the outer periphery of the magnet and a hollow-shaped first inner magnetic pole opposed to the inner periphery of the magnet, excited by the first coil respectively, a second outer magnetic pole opposed to the outer periphery of the magnet and a hollow-shaped second inner magnetic pole opposed to the inner periphery of the magnet, excited by the second coil respectively, a rotatable rotary shaft integral with the magnet, and a pressurizing means for pressurizing the rotary shaft in the axial direction, the pressurizing means being placed in the hollow cylindrical portion of the first inner magnetic pole. A motor having a high output, a compact shape and small working noises is provided.
摘要:
The stepping motor (10) comprises a rotary shaft (13), a cylindrical stator (2B,3B) including first and second driving coils (2A,3A) disposed along an axial direction of the rotary shaft (13) and energizable with driving currents having different phases, a cylindrical permanent magnet rotor (12) secured to the rotary shaft (13) in a coaxial relationship with the stator (2B,3B) and magnetized in a predetermined pattern, a housing (5,6) to which the stator (2B,3B) is secured and in which the rotor (12) is accommodated for movement in the axial direction of the rotary shaft (13) together with the rotary shaft (13), and fixing means (15) for adjustably fixing the rotor (12) with respect to the housing (5,6) at a position in the axial direction of the rotary shaft (13) at which the detent torque of the stepping motor (10) presents a minimum value. An adjusting method for minimizing a detent torque of such stepping motor (10) and a torque measuring apparatus which is used to put the adjusting method into practice are also disclosed.
摘要:
A built-up stepping motor (M) includes upper and lower housings (11, 12) each having an internal space and joined together with a support plate (18) disposed therebetween. The lower housing retains therein a stator (A, B) and a rotor (19) disposed in the stator, while the upper housing holds therein a reduction gear (20) for reducing the output speed of the motor. The output end of a rotor shaft (19b) extends through the support plate and meshes with a first gear (22) of the reduction gear. The upper and lower housings are assembled together by interlocking engagement between locking projections (12f) and mating holes (11f). A shock-absorbing damper (24) is disposed between two stator cores (A, B) to protect them against chattering.
摘要:
Mécanisme d'affichage (1) d'horlogerie comportant un tube de centre (2) fixé sur une platine (3) et comportant un alésage principal (4) ou une portée principale (5) de guidage pour le guidage en rotation, autour d'un axe principal (DP), d'un mobile d'affichage (6, 8) intérieur ou extérieur au tube de centre (2). Ce mécanisme d'affichage (1) comporte une butée axiale (7) agencée pour limiter à une valeur prédéterminée le jeu axial selon la direction de l'axe principal (DP) entre le tube de centre (2) et le mobile d'affichage (6, 8), et qui est une butée axiale rapportée (71, 79, 76, 98) qui est, ou bien montée prisonnière entre le tube de centre (2) et le mobile d'affichage (6, 8), ou bien fixée au mobile d'affichage (6, 8).
摘要:
L'actuateur linéaire est constitué d'un moteur électrique (13,20), d'un système (4) de déplacement d'une tige (42) et d'un dispositif de rappel (3). Pour toute position angulaire donnée du rotor (20), le système de déplacement d'une tige impose une position axiale longitudinale à une tige pouvant actionner une commande quelconque. Cette transmission de mouvement est assurée par une liaison vis-écrou (43, 45) ainsi que par une liaison à clavette (41,44a). Le dispositif de rappel, constitué d'une lame de ressort spiral (30) dont une extrémité est solidaire du bâti (10) alors que l'autre extrémité est fixée au rotor, permet de ramener le rotor, respectivement la tige mobile, en une position de départ en cas de disparition de la tension d'alimentation. Un tel dispositif est apte à commander un organe tel qu'une vanne, une soupape ou un clapet de ventilation devant impérativement revenir à une position déterminée en cas de disparition de la tension, en cas d'incendie par exemple.
摘要:
An intake air quantity control apparatus for use in a motor vehicle for controlling an intake air quantity introduced into an engine of the motor vehicle by controlling the opening degree of a throttle valve (7) provided in an air intake passage (1) of the engine. The intake air quantity control apparatus includes a stepping motor (9) connected to the throttle valve (7) and operatively coupled to an accelerating pedal (25) of the motor vehicle so that the stepping motor (9) drives the throttle valve (7) in response to depression of the accelerating pedal (25). The stepping motor (9) is arranged to be further controllable in response to a control signal from a control unit of the motor vehicle and thus comprising a stator (15) having a plurality of magnetic poles (37) and a plurality of windings (36) respectively wound around the magnetic poles (37) and excited by the control signal, a first rotor (17) rotatable with respect to the stator (15) in response to excitation of said windings (36) of said stator (15), and a second rotor (19) disposed between the stator (15) and the first rotor (17). The second rotor (19) is arranged so as not to receive a rotational torque with respect to the stator in response to the excitation of the windings and to allow transmission of magnetic fluxes from the stator (15) to the first rotor (17).
摘要:
Schrittmotor mit einem Läufer (5), der aus der Läuferwelle (17, 23) und einer Läufermagnethülse (29) gebildet ist, wobei die Läufermagnethülse (29) die Läuferwelle (17, 23) umschließt und in Umlauf versetzt. Zwischen der Läuferwelle (17, 23) und der Läufermagnethülse (29) ist eine Rutschkupplung (45) vorgesehen. Diese Rutschkupplung kann beispielsweise aus einem Filzbelag oder aus Fett bestehen.