FR2670628A1 - Rotor for electric motor - Google Patents

Rotor for electric motor Download PDF

Info

Publication number
FR2670628A1
FR2670628A1 FR9015686A FR9015686A FR2670628A1 FR 2670628 A1 FR2670628 A1 FR 2670628A1 FR 9015686 A FR9015686 A FR 9015686A FR 9015686 A FR9015686 A FR 9015686A FR 2670628 A1 FR2670628 A1 FR 2670628A1
Authority
FR
France
Prior art keywords
magnet
pinion
rotor
axis
electric motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
FR9015686A
Other languages
French (fr)
Inventor
Picaud Herve
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cheval Freres SA
Original Assignee
Cheval Freres SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cheval Freres SA filed Critical Cheval Freres SA
Priority to FR9015686A priority Critical patent/FR2670628A1/en
Publication of FR2670628A1 publication Critical patent/FR2670628A1/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/2726—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of a single magnet or two or more axially juxtaposed single magnets
    • H02K1/2733—Annular magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromechanical Clocks (AREA)

Abstract

The invention relates to a rotor (4) for an electric motor comprising a pinion (2) fixed to a shaft (3) and a magnet (4) mounted on the said shaft (3), characterised in that the fastening between the magnet (4) and the pinion (2)/shaft (3) assembly is achieved by tack welds (7) made between the adjacent faces of the pinion (2) and the magnet (4). Moreover, the pinion (2), at its end adjacent to the magnet (4), comprises a cutaway groove (6) forming a shoulder. The invention is applicable to quartz watch mechanisms.

Description

ROTOR POUR MOTEUR ELECTRIQUE
La présente invention concerne un rotor pour moteur électrique. Elle concerne plus particulièrement un rotor pour moteur pas à pas.ROTOR FOR ELECTRIC MOTOR
The present invention relates to a rotor for an electric motor. It relates more particularly to a rotor for a stepping motor.

Ces rotors sont constitués par un pignon généralement denté monté sur un axe et associé à un aimant permanent, par exemple constitué par un alliage samarium-cobalt ou néodyme-fer-bore.These rotors are constituted by a generally toothed pinion mounted on an axis and associated with a permanent magnet, for example constituted by a samarium-cobalt or neodymium-iron-boron alloy.

Le montage de ces éléments doit être réalisé de manière précise car le rotor est une pièce mobile pouvant avoir une vitesse de rotation très élevée.The assembly of these elements must be carried out precisely because the rotor is a moving part which can have a very high speed of rotation.

Jusqu'à présent, les montages de l'aimant sur l'axe du pignon demande un usinage très précis de celui-ci pour obtenir un centrage parfait par rapport au pignon. Cet usinage est une opération très délicate et très onéreuse compte tenu de la nature de l'alliage formant l'aimant.Up to now, mounting the magnet on the pinion axis requires very precise machining of the latter to obtain perfect centering with respect to the pinion. This machining is a very delicate and very expensive operation given the nature of the alloy forming the magnet.

Un des buts de l'invention est de remédier à ces inconvénients en proposant un rotor de conception permettant un montage aisé de l'aimant sur l'axe du pignon du rotor.One of the objects of the invention is to remedy these drawbacks by proposing a rotor of design allowing easy mounting of the magnet on the axis of the rotor pinion.

A cet effet, l'invention propose un rotor pour moteur électrique du type comprenant un pignon fixé sur un axe et un aimant fixé sur ledit axe caractérisé en ce que la solidarisation entre l'aimant et l'ensemble axe-pignon est réalisée par des points de soudure entre la face du pignon et la face associée de l'aimant.To this end, the invention provides a rotor for an electric motor of the type comprising a pinion fixed on an axis and a magnet fixed on said axis, characterized in that the connection between the magnet and the axis-pinion assembly is carried out by welding points between the face of the pinion and the associated face of the magnet.

Selon une caractéristique de l'invention, le pignon comprend un décolletage à l'extrémité adjacente à la face de l'aimant, les points de soudure étant réalisés au niveau de ce décolletage.According to a characteristic of the invention, the pinion comprises a turning at the end adjacent to the face of the magnet, the welding points being produced at the level of this turning.

Selon une autre caractéristique de l'invention, l'aimant comprend un alésage central dont le diamètre est supérieur ou égal au diamètre extérieur de l'axe du pignon. Avantageusement, ce diamètre est tel qu'il existe un jeu entre l'axe et l'aimant permettant ainsi un centrage précis de l'aimant avant d'effectuer les points de soudure.According to another characteristic of the invention, the magnet comprises a central bore whose diameter is greater than or equal to the outside diameter of the pinion axis. Advantageously, this diameter is such that there is a clearance between the axis and the magnet, thus allowing precise centering of the magnet before performing the welding points.

Le pignon du rotor de l'invention est généralement un pignon denté.The rotor pinion of the invention is generally a toothed pinion.

En outre, les points de soudure sont réalisés selon les techniques de soudage habituelles, comme par exemple par soudure Laser.In addition, the welding points are produced according to the usual welding techniques, such as for example by laser welding.

D'autres avantages, détails et caractéristiques de l'invention apparaîtront plus clairement au vu de la description détaillée d'un exemple de réalisation de l'invention faite en référence à la figure unique qui est une représentation schématique d'un rotor selon l'invention.Other advantages, details and characteristics of the invention will appear more clearly in the light of the detailed description of an exemplary embodiment of the invention made with reference to the single figure which is a schematic representation of a rotor according to the invention.

Un rotor 1 de moteur électrique notamment de moteur électrique pas à pas comprend un pignon 2 denté monté de manière solidaire sur un axe 3.A rotor 1 of an electric motor, in particular of a stepping electric motor, comprises a toothed pinion 2 mounted integrally on an axis 3.

Le pignon peut être monté à force sur l'axe 3 ou l'ensemble pignon-axe peut être une seule pièce obtenue par usinage;
L'axe 3 comprend plusieurs épaulements permettant le montage du rotor dans le moteur.The pinion can be force fitted on axis 3 or the pinion-axis assembly can be a single piece obtained by machining;
Axis 3 includes several shoulders for mounting the rotor in the engine.

Le rotor 1 comprend également un aimant 4 de forme cylindrique comprenant un alésage 5 central pour permettre son montage sur l'axe 3 de manière à venir en butée contre une face 2 du pignon.The rotor 1 also comprises a magnet 4 of cylindrical shape comprising a central bore 5 to allow its mounting on the axis 3 so as to abut against a face 2 of the pinion.

Selon un mode de réalisation de l'invention, le pignon 2 comprend un décolletage 6 formant un épaulement à son extrémité adjacente avec l'aimant 4.According to one embodiment of the invention, the pinion 2 comprises a turning 6 forming a shoulder at its adjacent end with the magnet 4.

Selon l'invention, l'aimant est rendu solidaire du pignon par des points de soudure 7 réalisés au niveau du contact entre les faces adjacentes de l'aimant 4 et du pignon 2. Les points de soudure sont avantageusement réalisés par soudure Laser.According to the invention, the magnet is made integral with the pinion by welding points 7 made at the contact between the adjacent faces of the magnet 4 and the pinion 2. The welding points are advantageously made by laser welding.

Selon la conception de solidarisation de l'aimant et du pignon de l'invention, on comprend aisément que l'alésage central 5 de l'aimant peut avoir un diamètre supérieur à celui de l'axe 3 pour créer ainsi un jeu 8.According to the design for securing the magnet and the pinion of the invention, it is easily understood that the central bore 5 of the magnet can have a diameter greater than that of the axis 3 to thereby create a clearance 8.

Ce jeu permet un montage et un centrage précis et aisé de l'aimant par rapport au pignon.This set allows precise and easy mounting and centering of the magnet in relation to the pinion.

Ainsi, il n'est pas nécessaire de réaliser un usinage précis de l'aimant, notamment pour la réalisation de l'alésage central. De ce fait, un aimant brut de perçage
Laser peut être utilisé.Thus, it is not necessary to carry out precise machining of the magnet, in particular for producing the central bore. Therefore, a raw drilling magnet
Laser can be used.

Le rotor de l'invention peut être utilisé notamment pour les mécanismes de montre à quartz. The rotor of the invention can be used in particular for quartz watch mechanisms.

Claims (4)

REVENDICATIONS 1. Rotor pour moteur électrique du type comprenant un pignon fixé sur un axe et un aimant monté sur ledit axe, caractérisé en ce que la solidarisation entre l'aimant (4) et l'ensemble pignon (2)/axe (3) est réalisée par des points de soudure (7) effectués entre les faces adjacentes du pignon (2) et de l'aimant (4).1. Rotor for an electric motor of the type comprising a pinion fixed on a pin and a magnet mounted on said pin, characterized in that the connection between the magnet (4) and the pinion (2) / pin (3) assembly is produced by welding points (7) made between the adjacent faces of the pinion (2) and the magnet (4). 2. Rotor selon la revendication (1), caractérisé en ce que le pignon (2) comprend à son extrémité adjacente à l'aimant (4), un décolletage (6) formant épaulement.2. Rotor according to claim (1), characterized in that the pinion (2) comprises at its end adjacent to the magnet (4), a turning (6) forming a shoulder. 3. Rotor selon la revendication 1 ou 2, caractérisé en ce que l'aimant (4) comprend un alésage central (5) de diamètre supérieur ou égal au diamètre de l'axe (3).3. Rotor according to claim 1 or 2, characterized in that the magnet (4) comprises a central bore (5) of diameter greater than or equal to the diameter of the axis (3). 4. Rotor selon la revendication (3), caractérisé en ce qu'il existe un jeu (7) entre l'aimant (4) et l'axe (3). 4. Rotor according to claim (3), characterized in that there is a clearance (7) between the magnet (4) and the axis (3).
FR9015686A 1990-12-14 1990-12-14 Rotor for electric motor Pending FR2670628A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9015686A FR2670628A1 (en) 1990-12-14 1990-12-14 Rotor for electric motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9015686A FR2670628A1 (en) 1990-12-14 1990-12-14 Rotor for electric motor

Publications (1)

Publication Number Publication Date
FR2670628A1 true FR2670628A1 (en) 1992-06-19

Family

ID=9403255

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9015686A Pending FR2670628A1 (en) 1990-12-14 1990-12-14 Rotor for electric motor

Country Status (1)

Country Link
FR (1) FR2670628A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2816126A1 (en) * 2000-10-31 2002-05-03 Valeo Equip Electr Moteur ARMATURE SHAFT OF ELECTRIC MOTOR COMPRISING AN OUTLET PINION, AND STARTER OF A MOTOR VEHICLE COMPRISING SUCH AN ARMATURE SHAFT

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3881243A (en) * 1973-03-16 1975-05-06 Mallory & Co Inc P R Method of making permanent magnet rotor for a synchronous motor
GB1497338A (en) * 1974-10-21 1978-01-05 Seiko Instr & Electronics Rotor of an electric motor
JPS60152239A (en) * 1984-01-18 1985-08-10 Seiko Epson Corp Rotor of converter for electronic timepiece

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3881243A (en) * 1973-03-16 1975-05-06 Mallory & Co Inc P R Method of making permanent magnet rotor for a synchronous motor
GB1497338A (en) * 1974-10-21 1978-01-05 Seiko Instr & Electronics Rotor of an electric motor
JPS60152239A (en) * 1984-01-18 1985-08-10 Seiko Epson Corp Rotor of converter for electronic timepiece

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 9, no. 318 (E-366)(2041) 13 décembre 1985, & JP-A-60 152239 (SUWA SEIKOSHA K.K.) 10 août 1985, *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2816126A1 (en) * 2000-10-31 2002-05-03 Valeo Equip Electr Moteur ARMATURE SHAFT OF ELECTRIC MOTOR COMPRISING AN OUTLET PINION, AND STARTER OF A MOTOR VEHICLE COMPRISING SUCH AN ARMATURE SHAFT
WO2002037647A1 (en) * 2000-10-31 2002-05-10 Valeo Equipements Electriques Moteur Electric motor armature shaft comprising an output gear and use thereof in a vehicle starter

Similar Documents

Publication Publication Date Title
FR2514425A1 (en) DAMPING MECHANISM FOR AUTOMOBILE STARTER
FR2766026A1 (en) ELECTRIC MACHINE AND METHOD FOR MOUNTING THE ELECTRIC MACHINE ON A UNIT
FR2624568A1 (en) FITTING BETWEEN A MOUNTING PLATE AND A BOLT
FR2887005A1 (en) SHOULDER RELEASE SOLENOID VALVE
FR2734961A1 (en) MOTOR-ELECTRIC REDUCER
FR2884366A1 (en) SYNCHRONOUS ELECTRIC MOTOR WITH VARIABLE SPEED
FR2643758A1 (en) ALTERNATOR FOR MOTOR VEHICLE
FR2717769A1 (en) CV joint.
FR2520946A1 (en) STARTER MOTOR FOR INTERNAL COMBUSTION ENGINE
EP0509379B1 (en) Electromagnetic micromotor with axial flux
FR3109481A1 (en) Compact gear motor
FR2516602A1 (en) STARTER MOTOR WITH PLANET REDUCTION GEARS
FR2515892A1 (en) ENGINE STARTING VEHICLE WITH REDUCING GEARS
CH680552B5 (en)
FR2802983A1 (en) ADJUSTABLE PUMP
FR2670628A1 (en) Rotor for electric motor
EP2570864A1 (en) Clock barrel with reduced core diameter
EP2570863A1 (en) Clock barrel assembly with reduced core diameter
FR2871401A1 (en) TOOL MOUNTING DEVICE
FR2488071A1 (en) ELECTRIC STARTING MOTOR FOR INTERNAL COMBUSTION ENGINES
FR3055119A1 (en) ICE WIPER TRAINING
FR2770589A1 (en) STARTING DEVICE FOR INTERNAL COMBUSTION ENGINES
FR2813105A1 (en) Pulley for vehicle alternator, comrises bell shaped body with profiled rim to support drive belt and inner hub which is threaded to receive shaft end with complementary thread and stop shoulder
FR2622642A1 (en) ENGINE STARTER STRUCTURE
FR2777326A1 (en) METHOD OF LINKING TWO DEGREES OF ROTATION FREEDOM AND BEARING FOR CARRYING OUT THE METHOD