EP0387321A1 - Solenoid plunger magnet and its use as print hammer in print hammer devices - Google Patents

Solenoid plunger magnet and its use as print hammer in print hammer devices

Info

Publication number
EP0387321A1
EP0387321A1 EP19890909165 EP89909165A EP0387321A1 EP 0387321 A1 EP0387321 A1 EP 0387321A1 EP 19890909165 EP19890909165 EP 19890909165 EP 89909165 A EP89909165 A EP 89909165A EP 0387321 A1 EP0387321 A1 EP 0387321A1
Authority
EP
European Patent Office
Prior art keywords
plunger
air gap
coil
solenoid plunger
yoke
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.)
Withdrawn
Application number
EP19890909165
Other languages
German (de)
French (fr)
Inventor
Horst Schweizer
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.)
AEG Olympia AG
AEG Olympia Office GmbH
Original Assignee
AEG Olympia AG
AEG Olympia Office GmbH
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
Priority to DE19883829676 priority Critical patent/DE3829676A1/en
Priority to DE3829676 priority
Application filed by AEG Olympia AG, AEG Olympia Office GmbH filed Critical AEG Olympia AG
Publication of EP0387321A1 publication Critical patent/EP0387321A1/en
Application status is Withdrawn legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00Magnets
    • H01F7/06Electromagnets; Actuators including electromagnets
    • H01F7/08Electromagnets; Actuators including electromagnets with armatures
    • H01F7/13Electromagnets; Actuators including electromagnets with armatures characterised by pulling-force characteristics

Abstract

L'invention concerne un système d'aimant à noyau plongeur, utilisé de préférence comme marteau d'impression dans un dispositif à marteau d'impression. The invention relates to a plunger core magnet system, preferably used as a hammer to print in a print hammer device. Des aimants à noyau plongeur connus contiennent à l'intérieur de la bobine excitatrice un premier entrefer qui sert d'entrefer de travail et un deuxième entrefer à l'extérieur de la bobine excitatrice qui sert d'entrefer de perte. Known plunger magnet contained inside the exciting coil a first gap which serves as a working air gap and a second gap on the outside of the exciting coil which serves as an air gap loss. Les lignes de force magnétique dans le deuxième entrefer sont perdues en tant que forces de déplacement du noyau plongeur. magnetic force lines in the second gap are lost as plunger movement forces. L'invention a pour objet d'accroître la force magnétique d'aimants à noyau plongeur en utilisant le deuxième entrefer également comme générateur de force sans que la génération de force dans l'entrefer interne ne soit affectée. The invention is intended to increase the magnetic force of core plunger magnets using the second gap also as force generator without the generation of force in the inner air gap is affected. A cet effet , une commande à cône extérieur est agencée dans l'entrefer externe, qui a une forme cylindrique et la longueur usuelle d'entrefers de perte. For this purpose, an external taper control is arranged in the external air gap, which has a cylindrical shape and the usual length of gaps loss. La force magnétique est ainsi considérablement accrue. The magnetic force is considerably increased.

Description

Solenoid plunger magnet, as well as its use as a print hammer in a Druckhaπrmervorrichtung

The invention relates to a plunger-type armature magnet, as well as its use as a print hammer in a printing hammer device of the type indicated in the preamble of claim 1.

In Figure 1, a solenoid plunger magnet 5 is shown, as is known from the early days of magnetic technology, wherein an obtuse Tauch¬ is pulled anchor 1 against a flat counter pole 2 of a yoke. 3 The working air gap 4 is in this solenoid plunger magnet 5 equal to the stroke of the plunger 1. This results in a steeply rising tension curve in particular so weak with long strokes at the outset that an exploitation is hardly possible. Moreover, the solenoid plunger magnet 5 to have a second air gap 6, which is also known as air gap loss, since this does not contribute to the thrust of the plunger. 1 It is also essential due to the high deflection force of plunger 1 against the opposite pole 2 a reduction in the service life.

Therefore, the formation of the air gaps to achieve the highest standards of performance and service life is very crucial. By corresponding design of the armature and Gegenpolgeometrie the characteristics can be influenced within wide ranges and thus adapted to the je¬ weiligen use. For this reason, the working air gap on the desired magnetic force line is ge staltet, while the loss gap is designed so as to have a very low magnetic resistance, but are generated er¬ also no forces in the direction of movement of the plunger 1 in it.

In DE-OS 26 36 985 a Tauchankersyste is described, in which the second air gap for generating magnetic force is utilized ge. However, the configuration of the outer air gap shown there is not practical since it causes a doubling of the Gesamt¬ air gap length and thereby a reduction of the magnetizations rule flow or a reduction in the magnetic forces in the first air gap, the air gap result.

The invention has the object of providing a Tauchankermagne¬ th form so that the inner air gap and the outer gap Luft¬ serve both for power generation without an increase in the total air gap length is caused over a plunger magnets conventional construction. This object is achieved by the designated in claim 1. invention.

The solenoid plunger magnet according to the invention enables an increase of the magnetic force to 200% for the same external dimensions and the same electrical characteristics compared to the previous magnet. The conventional means for obtaining a desired characteristic Magnetkraft¬ are fully maintained for the inner air gap.

Further advantageous embodiments of the subject invention are disclosed in the further dependent claims.

The invention is described in more detail with reference to embodiments below. Show it:

Figure 1 solenoid plunger magnet according to the prior art,

Figure 2 Gegenpolgeometrie anchor and the inner Luft¬ gap with external cone control,

Figure 3 Gegenpolgeometrie anchor and the inner Luft¬ gap with inner cone control,

Figure 4 anchor and the outer Gegenpolgeometrie Luft¬ gap with external cone control, Figure 5 anchor and the outer Gegenpolgeometrie Luft¬ gap with inner cone control,

Figure 6 solenoid plunger magnet with an inner cone at the control • internal air gap and external cone control the outer air gap,

7 shows magnetic lines of force at the outer air gap of the prior art in Figure 1,

Figure 8 lines of magnetic force in the outer air gap for a plunger-type armature magnet according to figure 6,

Figure 9 Hubkennlinien force for the solenoid plunger magnets according to Figure 1 and Figure 6, and

10 shows a solenoid plunger magnet Außenkegelsteue¬ tion on the inner and outer air gap.

To optimize the anchor and Gegenpolgeometrie purpose of higher magnetic force generating 2 and 3 examples of the design of the inner air gap are shown in the figures. In the figure 2, the armature 7 is formed cylindrical, wherein the yoke 8 9 and outer 10 has a cylindrical recess a cone-shaped lateral surface in order to obtain an outer cone control. In this type of magnet, the magnetic force characteristic is waage¬ right. Figure 3 has an inner cone control, the plunger 11 is immersed with a cone-shaped shell surface 12 in a correspondingly formed recess 13 of the yoke fourteenth In this, the magnetic force characteristic is progressive.

Figures 4 and 5 show training opportunities of the outer air gap, one of which external cone control is shown in FIG. 4 Here, the yoke 15 has a cylindrical recess 16 Aus¬ with a inwardly projecting stop 17 for the free end 18 of the cyl inthe-shaped portion of the plunger 19. The plunger 19 has an inner cone 20 in a known manner.

At the outer air gap, a Innenkegel¬ control is possible in accordance with Figure 5, the yoke 21 has a conical surface Mantel¬ 22 with a stop surface 23 has, which can be acted upon by a stop surface 24 in the armature 26th The Tauch¬ anchor 26 has an internal taper 25 in a known manner.

6 shows a solenoid plunger magnet 43 for use as a print hammer in a printing hammer device, wherein a plunger fixed ver¬ 26 is provided with a cylindrically shaped guide member 31 connected, which consists of a non-magnetic material and is mounted in a bearing bore 30 of a yoke 27 slidably. The inner air gap 44 is located in axial direction approximately centrally within an exciting coil 46, the holder having a coil 47 is mounted on a cylindrical projection 48 of the yoke 27 in a known manner. The inner air gap 44 is formed by an inner cone control, wherein the in the direction of movement of the plunger upon energization of the excitation coil 46 to the coil axis 26 extending toward lateral surface 33 has a cone angle of less than 10 °. This conical outer surface 33 is immersed in a serving as an opposite pole conical recess 34 as far until the free end 35 of the armature 26 on the surface 36 of the yoke 27 abuts Grund¬. The yoke 27 consists of an inner part 29 with the bearing hole 30 and the cylindrical projection 48 and a part 29 fixedly connected to the hollow cylinder 28, wherein both the part 29 and the hollow cylinder 28 made of a high permeability material.

The guide member 31 has a stop member 35, which apply a spring-loaded lever with a hammer head type lamellae of a type wheel, not shown. This non-illustrated spring-loaded lever is in the Pfeiffer 1 device 55 is acted upon guide member 31 after deenergization of the excitation coil 46 again in the initial position, the guide member 31 abuts with a damping element 51 to the yoke 27th Thereby Ge are noises in the provision of the guide member 31 in the zero position at Aus¬ avoided.

The outer air gap 45 is cylindrical and has an outer cone control, wherein the hollow cylinder 28 is a cylindrical ab¬ set U fang flat 39 and the armature 26 for Ein¬ immerse a cylindrical lateral surface 28 has. The distance between the Umfangsf1 äche 39 and the lateral surface 38 is about 0.15 mm and thus corresponds to the value of a normal air gap loss. The armature 26 has within the cylindrical outer surface 38 to a cavity 48 whose inner circumferential surface 37 to form an outer cone conically control runs. The generating lines of this cone extending from the outer edge 42 to the bottom surface 49 of the cavity 48 such that they intersect the coil axis against the movement direction of the plunger 26 upon energization of the excitation coil 46th The diameter ^ of the outer air gap 45 is related to the diameter of the Außen¬ diameter of the exciting coil 46 is approximately 1: 1. Further, have the outer air gap 45 forming the outer surface 38 and the inner Umfangsf1 äche 39 on the armature 26 and the yoke 27 as the magnetic compression regions formed on edges 41, 42 which amplify the thrust force of the plunger 26 at the start of the movement.

Figure 8 illustrates a line on the external air gap in the transition from the yoke 27 on the plunger 26 is the favorable course of the magnetic Kraft¬. In FIG 7, the corresponding magne¬ tables lines of force at the outer air gap 54, represented the loss of air gap. It can be seen that the lines of force do not support the movement of the plunger 52 effective. Also in this figure 7 of the leakage flux at the loss gap is clearly visible.

In the Figure 9, the force-stroke characteristics of Tauchankermagne¬ ten are shown, the inner and outer air gaps are formed according to Figures 7 and 8. FIG. The dashed curves show the lines of force of the solenoid plunger magnets similar to Figure 7 with a working air gap and having inner taper control while the solid curves relate beitsluftspalten according to Figure 8 with two Ar¬ plunger magnets. The performance differences between solenoid plunger magnet with one and with two working air gaps are clearly visible. The excitation coil was operated in each case with the currents 1A and 1.5A and duty cycles of 40% and 100%.

A horizontal magnetic force characteristic can armature magnetic system with a dip achieve by Figure 10, wherein both the inner air gap 55 and the outer air gap 56 forms cylindrical ausge¬ are. The lateral surfaces 57, 58 with the back side are formed conically 63 of Gegenpolfläche 60 and the back 64 of the casing surface 58 on the armature 59 and the antipole surfaces of the yoke 62 are cylindrical in shape. This causes the solenoid plunger magnet receives an external cone control, whereby a uniform force generation is obtained over the entire stroke of both the inner (55) and the outer air gap 56th In addition, the plunger-type armature magnet according to figure 10 is still an exciting coil 65 and a return spring 66 for the plunger 59.

The proposed magnetic system permits an increase in the magnetic force of up to 200% for the same outer dimensions and with the same electrical values.

Claims

claims:
1. solenoid plunger magnet consisting of a coil, a partly projecting into this coil plunger and as Flu߬ guide means formed yoke made of a high permeability material, which forms together with the plunger a magnetic flux path for the formed by the exciting coil magnetic field and a central recess for guiding comprises a non-magnetic guide member on the armature, wherein a first air gap inside the coil and a second air gap outside the coil between a respective surface on the plunger and in each case an adjacent this entspre¬ accordingly adapted mating surface are provided on the yoke in the Ausgahgsstel lung of the plunger characterized in that the air gaps (44, 45) facing surfaces (33, 38) on the plunger (26) and the counter surfaces (34, 39) on the yoke (27) are formed so ausge¬ that at least one of the two air gaps (44, 45) is cylindrical and an outer cone control propertied t and that the magnetic flux in the two air gaps (44, 45) for translation into the desired Um¬ Bewegungskraftkcmponente for the plunger (26) is used.
2. solenoid plunger magnet according to claim 1, dadurchgekenn ¬ characterized in that the other air gap (44) has a Innen¬ cone control, the supply in the direction of the Bewe¬ of the plunger (26) when energizing the coil (46) to the coil axis extending towards Mantelfl chen (33, 34) have a cone angle of less than 10 °.
Solenoid plunger magnet according to claim 1 or 2, dadurchge ¬ indicates that the inner air gap (44) approximately centrally in the axial direction in the exciting coil (46).
4. solenoid plunger magnet according to claim 1, 2 or 3 dadurchge, used to mark, that the inner air gap (44) facing surfaces (33, 34) on the armature (26) and formed as a recess mating surface (34) on the yoke (27 ) are tapered to form an inner cone control.
5. solenoid plunger magnet according to claim 1, 2, 3 or 4, d ad u rc h geken n ze i ch n et that facing the outer air gap (45) surfaces (38, 39) are cylindrical, wherein the Anke-- (26) within the cylindrical Mantel¬ surface (38) having a cavity (48) whose inner circumferential surface (37) to form an outer cone control from the outer edge (42) to the bottom surface (49) of Hohl¬ space (48 ) counter to the direction of movement of the plunger (26) when energizing the coil (46) to the coil axis extends conically.
6. solenoid plunger magnet according to claim 5 dadurchge, ke nn ¬ characterized in that the diameter of the outer air gap (45) to the diameter of the * excitation coil (46) is approximately 1: 1 behaves.
7. solenoid plunger magnet according to claim 5 or 6, dadur ch ge ¬ k s nzeichn et that the outer Luftspa ". (45) bil¬ Denden outer and inner circumferential surfaces (38, 39) on the armature (26) and to the yoke (27) as magnetic Verdich¬ tung areas formed edge (41, 42) which amplify the thrust force of the armature.
8. solenoid plunger magnet according to claim 7, dadurchgekenn ¬ characterized in that the yoke (27) is formed zyl inthe shape and a central bearing bore (30) au-fweist in which a to the armature (26) rigidly connected guide member (31) ver¬ slidably is mounted.
Solenoid plunger magnet according to claim 8, characterized geke nn i ¬ ze chnet that both air gaps (55, 56) are cylindrical.
10. solenoid plunger magnet according to claim 9, d ad urch geken n ¬ ze i seframe that the armature (59) and the yoke (62) have outer cone (63, 64).
EP19890909165 1988-09-01 1989-08-19 Solenoid plunger magnet and its use as print hammer in print hammer devices Withdrawn EP0387321A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19883829676 DE3829676A1 (en) 1988-09-01 1988-09-01 Solenoid plunger magnet, and its use as a pressure hammer in a pressure hammer device
DE3829676 1988-09-01

Publications (1)

Publication Number Publication Date
EP0387321A1 true EP0387321A1 (en) 1990-09-19

Family

ID=6362060

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890909165 Withdrawn EP0387321A1 (en) 1988-09-01 1989-08-19 Solenoid plunger magnet and its use as print hammer in print hammer devices

Country Status (4)

Country Link
US (1) US5066980A (en)
EP (1) EP0387321A1 (en)
DE (1) DE3829676A1 (en)
WO (1) WO1990003037A1 (en)

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Also Published As

Publication number Publication date
US5066980A (en) 1991-11-19
DE3829676A1 (en) 1990-03-15
WO1990003037A1 (en) 1990-03-22

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