FR2469617A1 - Electromagnetic brake for self-braking motor - has fixing screws defining positions of set screws in armature - Google Patents

Electromagnetic brake for self-braking motor - has fixing screws defining positions of set screws in armature Download PDF

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Publication number
FR2469617A1
FR2469617A1 FR8024182A FR8024182A FR2469617A1 FR 2469617 A1 FR2469617 A1 FR 2469617A1 FR 8024182 A FR8024182 A FR 8024182A FR 8024182 A FR8024182 A FR 8024182A FR 2469617 A1 FR2469617 A1 FR 2469617A1
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France
Prior art keywords
screws
armature
electromagnetic brake
motor
magnetic core
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Withdrawn
Application number
FR8024182A
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French (fr)
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Individual
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Individual
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Publication date
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Publication of FR2469617A1 publication Critical patent/FR2469617A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H02K7/102—Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction brakes
    • H02K7/1021—Magnetically influenced friction brakes
    • H02K7/1023—Magnetically influenced friction brakes using electromagnets
    • H02K7/1025—Magnetically influenced friction brakes using electromagnets using axial electromagnets with generally annular air gap
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/24—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member
    • F16D55/26—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member without self-tightening action
    • F16D55/28—Brakes with only one rotating disc
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D59/00—Self-acting brakes, e.g. coming into operation at a predetermined speed
    • F16D59/02—Self-acting brakes, e.g. coming into operation at a predetermined speed spring-loaded and adapted to be released by mechanical, fluid, or electromagnetic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D2055/0004—Parts or details of disc brakes
    • F16D2055/0058—Fully lined, i.e. braking surface extending over the entire disc circumference
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/38—Slack adjusters
    • F16D2065/383—Slack adjusters for adjusting the spring force in spring-applied brakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00—Type of actuator operation force
    • F16D2121/18—Electric or magnetic
    • F16D2121/20—Electric or magnetic using electromagnets
    • F16D2121/22—Electric or magnetic using electromagnets for releasing a normally applied brake

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

The electromagnetic brake has a magnetic core (1) and an armature (3) with three or more through-holes arranged symmetrically around its periphery. Set screws (6) fit into these holes and screw into corresponding threaded holes (7) in the core. Fixing screws (11) coaxial with the set screws define the positions of the set screws. The core is toroidal and has a slot on one side to hold the excitation coil (2). The armature is disc-shaped and coupled to the core. The armature is acted on by springs (4)located in the core and carries a peripheral friction ring (5).

Description

La présente invention concerne un frein électromagnétique pour moteur frein, équipé de moyens de réglage manuel du jeu entre le plateau de freinage et l'armature. The present invention relates to an electromagnetic brake for a brake motor, equipped with means for manual adjustment of the clearance between the brake plate and the armature.

On connaît des moteurs électriques pourvus d'organes, généralement électromagnétiques, susceptibles de provoquer le blocage ou l'arrêt progressif de ces moteurs. Electric motors are known which are provided with organs, generally electromagnetic, capable of causing the blocking or progressive stopping of these motors.

De tels organes ou freins sont assimilables essentiellement à un embrayage électromagnétique à friction et comprennent une partie fixe et une partie solidaire de l'arbre moteur. Such members or brakes are essentially comparable to an electromagnetic friction clutch and include a fixed part and a part secured to the motor shaft.

Pour des raisons de service ou de sécurité, on utilise des moteurs autofreinants dits à "courant de repos", susceptibles d'être arrêtés automatiquement en cas de panne de courant. For service or safety reasons, self-braking motors known as "quiescent current" are used, which can be stopped automatically in the event of a power failure.

Dans ces moteurs, les organes de freinage sont constitués par deux disques opposés, dont un, fixe, est constitué par la carcasse du moteur, l'autre étant susceptible de se déplacer le long de l'arbre du moteur. In these engines, the braking members consist of two opposite disks, one of which, fixed, is formed by the carcass of the engine, the other being capable of moving along the shaft of the engine.

Les disques portent de préférence des anneaux en matériau à coefficient de frottement élevé entre lesquels tourne un plateau solidaire de l'arbre du moteur. The discs preferably carry rings of material with a high coefficient of friction between which rotates a plate secured to the motor shaft.

Le disque mobile axialement est maintenu pressé par une série de ressorts sur le plateau de freinage. The axially movable disc is kept pressed by a series of springs on the braking plate.

Ce disque mobile néanmoins peut se dégager du plateau, par l'action du champ généré par une bobine enroulée sur un noyau magnétique. This mobile disc can nevertheless be released from the plate, by the action of the field generated by a coil wound on a magnetic core.

Evidemment, I'efficacité du freinage est étroitement liée soit à la valeur de la compression des ressorts, soit à l'épaisseur des anneaux en matériau de frottement. Obviously, the effectiveness of braking is closely linked either to the value of the compression of the springs, or to the thickness of the rings of friction material.

Ces derniers, d'autre part, s'usent progressivement et pour cela leur action sur le plateau de freinage perd de son efficacité. The latter, on the other hand, wear out gradually and for this their action on the braking plate loses its effectiveness.

On a en conséquence le problème de régler périodiquement la distance entre les deux disques ci-dessus mentionnésdansdansle but d'effec- tuer une reprise adéquate du jeu entre le plateau de freinage et les anneaux en matériau à coefficient de frottement élévé. There is therefore the problem of periodically adjusting the distance between the two discs mentioned above with the aim of effecting an adequate recovery of the play between the brake plate and the rings made of material with a high coefficient of friction.

Il existe dans quelques moteurs des systèmes de régulation automatique, mais ceux-ci sont de structure complexe de sorte que le coût de fabrication reste élevé, et que de fréquentes et délicates interventions d'entretien et de réglage sont périodiquement requises. In some engines there are automatic control systems, but these are of complex structure so that the manufacturing cost remains high, and that frequent and delicate maintenance and adjustment operations are periodically required.

Le problème de réglage est au contraire résolu d'une manière simple et linéaire par l'ensemble de freinage électromagnétique perfectionné selon la présente invention. The adjustment problem, on the contrary, is solved in a simple and linear manner by the electromagnetic braking assembly perfected according to the present invention.

Dans cet ensemble de freinage, en fait, la distance entre la carcasse du moteur et le noyau magnétique, auquel est couplé le disque mobile ou armature est réglable manuellement au moyen d'une série de vis de réglage de fixation. In this braking assembly, in fact, the distance between the motor casing and the magnetic core, to which the moving disc or armature is coupled, is manually adjustable by means of a series of fixing adjustment screws.

Plus précisément, dans le noyau magnétique et dans 1' arma- ture, on a ménagé au moins trois alésages traversants disposés symétriquement à la périphérie du moteur. More specifically, in the magnetic core and in the armature, at least three through bores have been arranged symmetrically arranged at the periphery of the motor.

A l'intérieur de ces alésages,sont insérées des vis qui s 'in- sèvrent dans des trous filetés correspondants. Inside these bores are inserted screws which fit into corresponding threaded holes.

-Dans la pratique, en agissant d'une manière coordgnée sur les susdites vis de réglage, il est possible de régler la distance mutuelle entre l'armature et la carcasse du moteur, éliminant le jeu éventuellement crée entre le plateau et les deux anneaux en matériau à coefficient de frottement élevé. Les vis de réglage s'étendent axialement par rapport aux vis
de fixation, qui ont pour fonction de bloquer les vis de réglage après avoir obtenu la position désirée pour ces dernières.-In practice, by acting in a coordinated manner on the above adjustment screws, it is possible to adjust the mutual distance between the armature and the motor casing, eliminating the play possibly created between the plate and the two rings in material with a high coefficient of friction. The adjustment screws extend axially with respect to the screws
fixing, which have the function of locking the adjustment screws after obtaining the desired position for the latter.

Ces particularités et caractéristiques seront mieux comprises en référence à la description d'un exemple de réalisation et au dessin annexé, qui représente une vue en coupe du frein électromagnétique selon la présente invention. These features and characteristics will be better understood with reference to the description of an exemplary embodiment and to the accompanying drawing, which represents a sectional view of the electromagnetic brake according to the present invention.

En référence à la figure, le frein électromagnétique selon l'invention comprend un noyau magnétique annulaire 1 comportant sur une de ses faces un évidement pour loger la bobine d'excitation 2 destinée à coopérer avec un disque ou armature 3. With reference to the figure, the electromagnetic brake according to the invention comprises an annular magnetic core 1 comprising on one of its faces a recess for housing the excitation coil 2 intended to cooperate with a disc or armature 3.

Ladite armature est en appui contre une série de ressorts de poussée 4, logés dans des alésages appropriés du noyau magnétique, et porte à sa périphérie un anneau 5 réalisé en un matériau à coefficient de frottement élevé. Said armature bears against a series of thrust springs 4, housed in suitable bores of the magnetic core, and carries at its periphery a ring 5 made of a material with a high coefficient of friction.

Le noyau magnétique et l'armature comportent trois ou plusieurs alésages périphériques dans lesquels s'insère un nombre correspondant de vis de réglage 6, qui s'engagent dans des trous filetés 7 formés dans le corps de l'aimant 1, tandis que des vis de fixation 11, respectivement coaxiales aux vis de réglage 6, permettent de bloquer ces dernières dans la position désirée. The magnetic core and the armature comprise three or more peripheral bores into which a corresponding number of adjusting screws 6 are inserted, which engage in threaded holes 7 formed in the body of the magnet 1, while screws 11, respectively coaxial with the adjustment screws 6, allow the latter to be locked in the desired position.

Sur le capot 8 du moteur est appliqué un second anneau 5', en un matériau à fort coefficient de frottement, situé en regard de l'anneau 5. A second ring 5 ′ is applied to the cover 8 of the engine, made of a material with a high coefficient of friction, located opposite the ring 5.

Entre les deux anneaux 5 et 5', s'insére le bord périphérique d'un plateau de freinage 9, couplé élastiquement à l'arbre moteur 10 de manière à tourner en même temps que lui. Between the two rings 5 and 5 ', the peripheral edge of a braking plate 9 is inserted, elastically coupled to the motor shaft 10 so as to rotate at the same time as it.

En pratique par conséquent,en l'absence d'excitation de la bobine 2, les ressorts 4 pressent par l'intermédiaire de l'armature 3 l'anneau de frottement 5 sur la périphérie du plateau, le poussant contre le second anneau de frottement 5' pour assurer le freinage du moteur. In practice therefore, in the absence of excitation of the coil 2, the springs 4 press through the armature 3 the friction ring 5 on the periphery of the plate, pushing it against the second friction ring 5 'for braking the engine.

Inversement, lorsque la bobine est excitée, l'attraction du noyau magnétique 1 sur l'armature surmonte la poussée des ressorts 4, en débloquant le plateau de freinage. Conversely, when the coil is energized, the attraction of the magnetic core 1 on the armature overcomes the thrust of the springs 4, by unlocking the braking plate.

Le rattrapage du jeu qui se crée à la suite d'usure entre les anneaux de frottement et le plateau de freinage, est effectué à l'aide des vis de réglage 6. Ces dernières sont montées coaxiales aux vis de fixation 11 dont le rôle est de bloquer les susdites vis de réglage 6, après avoir obtenu la position exacte désirée pour ces dernières.  The adjustment of the clearance which is created as a result of wear between the friction rings and the braking plate, is carried out using the adjusting screws 6. The latter are mounted coaxial with the fixing screws 11 whose role is to block the aforesaid adjustment screws 6, after having obtained the exact desired position for the latter.

Claims (4)

REVENDICATIO,sSREVENDICATIO, sS 1. Frein électromagnétique pour moteur-frein, caractérisé en ce qu'il comprend un noyau magnétique 1 et une armature 3, comportant au moins trois alésages traversants disposés symétriquement à la périphérie du moteur, et des vis de fixation 11 et de réglage 6, logées dans lesdits alésages et insérés dans des trous filetés 7 formés dans le corpsdel'ai- mant, les vis de fixation étant respectivement coaxiales aux vis de réglage pour permettre de bloquer ces dernières dans la position désirée. 1. Electromagnetic brake for motor-brake, characterized in that it comprises a magnetic core 1 and a frame 3, comprising at least three through bores arranged symmetrically at the periphery of the motor, and fixing and adjustment screws 11, housed in said bores and inserted into threaded holes 7 formed in the magnet body, the fixing screws being respectively coaxial with the adjustment screws to allow the latter to be locked in the desired position. 2. Frein électromagnétique selon la revendication 1, caractérisé en ce qu'il comprend un noyau magnétique annulaire 1, comportant sur une face une rainure de retenue de la bobine d'excitation 2, à laquelle s'accouple un disque 3 repoussé par une série de ressorts de poussée 4 logés dans le noyau magnétique 1, et portant un anneau 5 réalisé en un matériau à fort coefficient de frottement. 2. Electromagnetic brake according to claim 1, characterized in that it comprises an annular magnetic core 1, comprising on one face a retaining groove for the excitation coil 2, to which a disc 3 repelled by a series mates thrust springs 4 housed in the magnetic core 1, and carrying a ring 5 made of a material with a high coefficient of friction. 3. Frein électromagnétique selon la reyendication 2, caractérisé en ce que le noyau magnétique 1 et l'armature comportent au moins trois alésages traversants disposés symétriquement à la périphérie du moteur, dans lesquels sont logées les vis 6 qui s'engagent dans les trous filetés 7, et en ce que la carcasse du moteur porte unsecond anneau 5' en un matériau à coefficient de frottement élevé en regard de l'anneau 5. 3. Electromagnetic brake according to reyendication 2, characterized in that the magnetic core 1 and the armature comprise at least three through bores arranged symmetrically at the periphery of the motor, in which are housed the screws 6 which engage in the threaded holes 7, and in that the motor carcass carries a second ring 5 ′ made of a material with a high coefficient of friction opposite the ring 5. 4. Frein électromagnétique selon l'une quelconque des revendications précédentes, caractérisé en ce qu'entre les deux anneaux 5 et 5' en matériau de frottement est disposée la bande périphérique d'un plateau de freinage 9, solidaire de l'arbre moteur.  4. Electromagnetic brake according to any one of the preceding claims, characterized in that between the two rings 5 and 5 'of friction material is disposed the peripheral strip of a braking plate 9, integral with the motor shaft.
FR8024182A 1979-11-16 1980-11-13 Electromagnetic brake for self-braking motor - has fixing screws defining positions of set screws in armature Withdrawn FR2469617A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2315479U IT7923154V0 (en) 1979-11-16 1979-11-16 PERFECTED ELECTROMAGNETIC BRAKE, FOR SELF-BRAKING MOTORS, PROVIDED WITH MANUAL ADJUSTMENT OF THE CLEARANCE BETWEEN BRAKING PAD AND STILL.

Publications (1)

Publication Number Publication Date
FR2469617A1 true FR2469617A1 (en) 1981-05-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR8024182A Withdrawn FR2469617A1 (en) 1979-11-16 1980-11-13 Electromagnetic brake for self-braking motor - has fixing screws defining positions of set screws in armature

Country Status (4)

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DE (1) DE3040980A1 (en)
ES (1) ES254087U (en)
FR (1) FR2469617A1 (en)
IT (1) IT7923154V0 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0146783A2 (en) * 1983-12-21 1985-07-03 Westinghouse Electric Corporation Improved lightweight electric robotic actuator
WO2023143821A1 (en) * 2022-01-27 2023-08-03 Sew-Eurodrive Gmbh & Co. Kg Electric motor comprising an angle sensor and an electromagnetically actuatable brake

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4811820A (en) * 1986-01-12 1989-03-14 Kone Oy Disk brake motor
WO2013098936A1 (en) * 2011-12-27 2013-07-04 株式会社安川電機 Motor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR95911E (en) * 1965-12-29 1972-03-10 Verlinde Sa Disc brake, electromagnetic, for electric motor.
FR2406756A1 (en) * 1977-10-22 1979-05-18 Brinkmann Ind Verwaltung ELECTROMAGNETIC BRAKE

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR95911E (en) * 1965-12-29 1972-03-10 Verlinde Sa Disc brake, electromagnetic, for electric motor.
FR2406756A1 (en) * 1977-10-22 1979-05-18 Brinkmann Ind Verwaltung ELECTROMAGNETIC BRAKE

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0146783A2 (en) * 1983-12-21 1985-07-03 Westinghouse Electric Corporation Improved lightweight electric robotic actuator
EP0146783A3 (en) * 1983-12-21 1985-12-04 Westinghouse Electric Corporation Improved lightweight electric robotic actuator
WO2023143821A1 (en) * 2022-01-27 2023-08-03 Sew-Eurodrive Gmbh & Co. Kg Electric motor comprising an angle sensor and an electromagnetically actuatable brake

Also Published As

Publication number Publication date
ES254087U (en) 1981-02-16
DE3040980A1 (en) 1981-05-27
IT7923154V0 (en) 1979-11-16

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