Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H50/00—Details of electromagnetic relays
  • H01H50/02—Bases; Casings; Covers
  • H01H50/04—Mounting complete relay or separate parts of relay on a base or inside a case
  • H01H50/041—Details concerning assembly of relays
  • H01H50/042—Different parts are assembled by insertion without extra mounting facilities like screws, in an isolated mounting part, e.g. stack mounting on a coil-support
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H50/00—Details of electromagnetic relays
  • H01H50/16—Magnetic circuit arrangements
  • H01H50/18—Movable parts of magnetic circuits, e.g. armature
  • H01H50/24—Parts rotatable or rockable outside coil
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H50/00—Details of electromagnetic relays
  • H01H50/44—Magnetic coils or windings
  • H01H2050/446—Details of the insulating support of the coil, e.g. spool, bobbin, former
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H49/00—Apparatus or processes specially adapted to the manufacture of relays or parts thereof

Definitions

• the invention relates to a hinged armature magnetic drive for electrical switching devices which contain a movable contact carrier receiving housing part and a housing part receiving the magnetic drive, and a method for preassembling the hinged armature magnetic drive.
• the invention relates to a direct current magnetic drive for contactors.
• Such a drive is known from DE 33 35 809 C2, which is received by the lower housing part of a contactor and is connected via a hinged armature to the contact carrier, which is located together with the switching chambers and the connecting terminals in the upper housing part.
• the drive contains an L-shaped yoke, on the first yoke leg of which a magnetic core is fastened, which is aligned parallel to the second yoke leg, on which a coil former with an excitation winding is seated and on the free end of which a pole plate is fastened.
• the folding anchor has a cutting edge with which it is pivotably mounted in a corner between the inner wall of the lower housing part and the free end face of the second yoke leg.
• the stroke limitation in the tightened state of the hinged armature is carried out for its free end by an end face on the coil body flange. Apart from the complicated cutting edge storage of the hinged anchor, this must be done can be aligned in a complex manner by means of an adjusting screw reaching through an elongated hole in the lower housing part and screwing into the second yoke leg with the aid of a special adjusting gauge in order to adjust the armature stroke precisely with respect to the parting plane between the upper and lower housing part.
• a further disadvantage is that the iron parts yoke, magnetic core and pole plate are to be joined together in a complex manner and, in order to ensure reliable drive behavior, they have to be worked together with the hinged armature with regard to their dimensions running parallel to the coil axis to very tight tolerances .
• the magnetic drive can only be fully assembled when it is installed in the lower housing part.
• the invention is therefore based on the object of specifying a folding armature magnetic drive which is simple and reliable to manufacture by overcoming the tolerance problems associated with the iron parts and which permits automatic pre-assembly as a compact assembly.
• the yoke with its first yoke leg and the pole plate on both ends of the magnetic core are embedded in one of the coil body flanges in that the hinged armature by means of lateral bearing approaches in outwardly open bearing recesses of the armature-side coil body flange and against the inner surface of the second yoke leg is mounted so that it cannot be lost, that the first yoke leg, the magnetic core and the pole plate are non-positively connected to one another under spring action and that the bobbin with its armature-side bobbin flange and the second yoke leg with its outer surface in the housing part is non-positively.
• the type of storage of the iron parts yoke, magnetic core and pole plate and their exclusively non-positive connection the type of storage of the hinged armature and its magnetic active connection with the inner surface of the second yoke leg and finally the non-positive connection
• Storage of the drive in the receiving housing part no longer determines the tolerances of the iron parts for the accuracy of the armature stroke, since these are compensated for by the spring action.
• the armature stroke is only determined by the dimensions of the coil body and the housing parts which are not necessarily separable, it being possible for these parts to be produced from conventional mold masses with tolerances which are insignificant for the armature stroke.
• the pole plate can be inserted into a lateral guide slot of the armature-side coil body flange and is held by this and by an opposite holding recess.
• the guide slot and holding recess are advantageous means for inserting and holding the pole plate in the coil body, expediently such that the pole plate is prevented from falling out by a locking lug protruding in the guide slot.
• first yoke leg is embedded between an end face and lateral overhangs of the bobbin flange facing away from the armature.
• This bobbin flange can advantageously be designed so that parts of it exert an elastic force on the outer surface of the first yoke leg, so as to form a known spring means for generating the contact pressure for the yoke and the magnetic core against the pole plate.
• the clamping spring is inserted, expediently if the clamping spring is a leaf spring and is held in the associated latching recesses of the overhangs with lateral retaining knobs.
• the pivotal movement can advantageously be limited by the associated bearing recesses themselves, in that the bearing recesses are dimensioned with respect to the bearing attachments in such a way that the pivoting movement of the hinged anchor is limited, in particular by their clear height in relation to the material thickness of the bearing attachments of the anchor.
• the two bearing attachments of the hinged armature and the associated bearing recesses of the armature-side coil former flange are of different lengths or widths. If necessary, this secures the hinged anchor in a 180 ° offset position before installation.
• a further advantageous embodiment consists in the fact that the hinged armature has an actuation extension opposite the end face on the swivel axis side, which is connected to the contact carrier and lies between an end opening in the armature-side coil former flange, which results in a flat design of the hinged armature and thus an unproblematic insertion into the Coil body allowed.
• An essentially rectangular cross-sectional shape of the coil body makes it considerably easier to insert the iron parts, in particular from the point of view of an automated pre- and final assembly of the drive.
• An advantageous embodiment for realizing the force-fitting incorporation of the housing base consists in that the connecting terminals, switching chambers and contact carrier housing part represents an upper part and the housing for the magnetic drive represents a lower part of the contactor which can be separated from the upper part of a contactor and that the armature-side coil former flange on the side wall and the outer surface of the second yoke leg on the bottom of the housing bottom Housing part rests or rests.
• end-face configurations on the coil-body flange facing away from the anchor which are in counter pressure with the opposite side wall of the lower housing part, ensure a precise position of the coil body in the lower housing part and thus of the hinged armature relative to the contact carrier.
• the side of the coil body facing away from the second yoke leg has further designs which are in counter pressure with the opposing bottom wall of the upper housing part. If necessary, the further designs result in the second yoke leg being pressed tightly against the coil body through the housing base.
• a hinged armature magnetic drive consists of an L-shaped yoke, a magnetic core, a pole plate, a flat hinged armature and an essentially cuboid coil body with an excitation winding
• assembly steps solved 1) the parallelepiped-shaped pole plate is inserted in a straight line parallel to the later pivot axis of the hinged armature into a lateral guide slot and an opposite holding recess of the anchor-side coil body flange, 2) the magnetic core is inserted in a straight line from the end face facing away from the anchor,
• the hinged armature is pushed in a straight line with a front-side actuation extension running in its plane into the armature-side coil body flange until it is embedded in bearing recesses of the armature-side coil body flange with lateral bearing projections arranged in its rear pivot axis, 4) the yoke is inserted with its first yoke leg in a straight line between an end face and lateral overhangs of the bobbin flange facing away from the armature, until the second yoke leg lies in lateral recesses of the bobbin flange and its inner surface is opposite the front side of the hinged armature on the pivot axis side, and
• a leaf-shaped clamping spring is clamped in a straight line between the outer surface of the first yoke leg and the lateral overhangs and thereby the yoke, magnetic core and pole plate are captively held and held relative to one another and to the coil former.
• the proposed method for preassembly does not require a releasable or non-releasable, form-fitting connection of the iron parts yoke, magnetic core and pole plate as well as subsequent adjustment to compensate for tolerances.
• all components of the drive are joined in a self-retaining and self-adjusting manner with straight lines and movements that are parallel or orthogonal to one another to form an assembly.
• the process is therefore ideal for automated pre-assembly.
• the result is a compact assembly which is functional on its own and which is advantageous to use, in particular it can be checked alone and can be automatically assembled.
• Figure 1 the partial representation of a contactor in longitudinal section with a DC current armature according to the invention
• FIG. 2 the folding armature magnetic drive from FIG. 1 in a perspective representation
• Figure 4 as Figure 2, but in longitudinal section
• Figure 5 the folding armature magnetic drive in an exploded view, leaving out the excitation winding.
• the contactor 10 is surrounded by a lower housing part 12 and an upper housing part 14 which is only shown in fragments and which is to be snapped onto the lower housing part 12.
• a folding armature magnetic drive 16 is embedded in the lower housing part 12.
• Main connecting terminals and associated switching chambers are arranged in the upper housing part 12 in a conventional manner, but not shown.
• a contact carrier 18 with movable contacts is mounted in the upper housing part 14.
• the contact carrier 18 is acted upon by spring force in such a way that it comes to bear against the right side wall 20 of the upper housing part 14.
• the hinged armature 26 of the drive 16 engages with an actuation extension 24 in an opening 22 of the contact carrier 18 in order to move it to the left due to its pulling movement as a result of sufficient direct current being applied to the drive 16.
• the hinged armature magnetic drive 16 consists of the iron parts of the hinged armature 26, yoke 28, magnetic core 30 and pole plate 32 as well as a coil former 34 made of plastic molding compound with an excitation winding 36 and with a protective circuit 38.
• the coil body 34 is essentially rectangular in shape and has 36 coil bodies on both sides of the excitation winding. flanges 40, 41.
• Two domes 42 and 43 with control connection terminals 44 and 45 for control leads, connecting wires of the field winding 36 and the protective circuit 38 are formed on the coil body flange 40, which is located on the side of the hinged armature 26.
• the cuboid magnet core 30 is located within the rectangular, continuous coil opening 46 of the coil body 34.
• the rectangular strip-shaped pole plate 32 is embedded in the armature-side coil body flange 40 on the right end 48 of the magnet core 30.
• a lateral guide slot 50 and an opposite holding recess 52 for receiving the two narrow regions of the pole plate 32 are provided in the bobbin body flange 40.
• the yoke 28, which is bent in an L-shape from a rectangular, flat sheet metal strip, has a shorter, first yoke leg 54 and a longer, second yoke leg 56.
• the first yoke leg 54 is embedded in the coil body flange 41 facing away from the hinged armature 26 parallel to the pole plate 32.
• two lateral overhangs 58, 59 are provided on the bobbin flange 41, which are raised from the end face thereof.
• the second yoke leg 56 which is arranged parallel to the magnetic core 30, lies in lateral recesses 60 and 61 of the coil body flanges 40 and 41, respectively, which are designed in accordance with the leg width and thickness.
• the rectangular plate-shaped hinged armature 26 has lateral bearing projections 62 and 63 with which it is pivotably mounted beyond the pole plate 32 in bearing recesses 64 and 65 of the coil body flange 40 which are open at the bottom (see also FIG. 5). With its end 66 on the swivel axis side, the armature 26 is captively supported against the inner surface of the free end of the second yoke leg 56. A corresponding end opening 70 is provided in the coil body flange 40 for the actuation extension 24 projecting from the end side 66.
• the bearing lugs 62 and 63 are of different lengths. Accordingly, the bearing recesses 64 and 65 are not the same depth.
• the height of the bearing recesses 64 and 65 can be dimensioned relative to the material thickness of the bearing lugs 62 and 63 so that the pivoting angle of the hinged armature 26 is limited.
• a clamping spring 68 designed as a leaf spring is clamped between the overhangs 58, 59 of the bobbin flange 41 facing away from the armature and the outer surface of the first yoke leg 54.
• the first yoke leg 54, the magnetic core 30 and the pole plate 32 are non-positively in a magnetically conductive connection.
• This force effect and the position of the pole plate 32 in the coil body 34 defined by the guide slot 50 and the holding recess 52 simultaneously bring the iron parts 28 to 32 into an adjusted position by compensating for their tolerances in the direction of the coil axis.
• the excess of the second yoke leg 56 with respect to the point of contact of its inside with the end 66 66 of the hinged armature on the swivel axis side serves to compensate for the aforementioned tolerances.
• Lateral retaining knobs can be pronounced on the clamping spring 68, which provide the clamping spring 68 in connection with associated latching recesses in the overhangs 58 and 59 an additional hold.
• the clamping spring 68 all iron parts 26 to 32 are captively held in the coil body 34.
• the hinged armature magnetic drive 10 represents a module which is preassembled in a simple manner and is easy to handle.
• the hinged armature 26 rests on a web-shaped stop surface 72 formed on the end face of the coil body flange 40.
• the stop surface 72 runs in a first limiting plane A for a defined stroke limitation of the hinged armature 26.
• the accuracy of the stroke limitation of the tightened hinged armature 26 is therefore not determined by the tolerances of the iron parts 26 to 32, but by the closely tolerable dimensions of the coil body 34.
• the web height of the stop surface 72 is dimensioned such that a narrow remanent air gap 74 remains between the tightened folding armature 26 and the pole plate 32.
• a so-called anti-adhesive sheet to be applied to the pole plate 32 or the folding anchor 26 is therefore not necessary.
• An end formation 76 is formed on the anchoring-facing coil body flange 41. After inserting the hinged armature magnetic drive 16 into the lower housing part 12, the formation 76 with its opposite left side wall 78 is in counter pressure, as a result of which the armature-side coil body flange 40 is non-positively applied to the right side wall 80 of the lower housing part 12.
• the inner walls of the right side walls 20 and 80 of the connected upper and lower housing parts 12 and 14 determine a second limiting plane B, which runs parallel to the first limiting plane A. Due to the counter pressure mentioned, the first limiting plane A is automatically at a precisely defined distance from it second boundary plane B.
• the accuracy of this distance is influenced solely by the closely tolerable dimensions of the coil body 34 and - but to a much lesser extent - the molded parts of the lower housing part 12 and upper housing part 14. Due to the very precise distance between the two delimitation planes A and B, the stroke limitation of the hinged armature 26 is in relation to the upper housing part 14 and thus also with respect to the contact carrier 18 both in the tightened and in the dropped state self-determined. Thus, in the hinged armature magnetic drive 16 according to the invention, no complex measures for adjusting the armature stroke to compensate for the tolerances of the iron parts 26 to 32 are required.
• two further designs 82 are formed behind the domes 42, 43, and two further designs 83 are formed on the coil body flange 41 facing away from the anchor. These further designs 82, 83 spring against the bottom wall 84 of the upper housing part 14 snapped onto the lower housing part 12.
• the hinged armature magnetic drive 16 lies uniformly non-positively on the housing bottom 86 of the lower housing part 12 and thus requires no further fastening means.
• the outer surface of the second yoke leg 56 lies non-positively and in parallel on the housing base 86.
• the hinged armature magnetic drive 16 is composed of the iron parts L-shaped yoke 28 already described, cuboid magnetic core 30, cuboid pole plate 32, flat hinged armature 26 and the essentially cuboid coil body 34 with the excitation winding, which is not shown for reasons of better visibility.
• the pole plate 32 is inserted in a straight line parallel to the later pivot axis of the hinged armature 26 into a lateral guide slot 50 and an opposite holding recess 52 of the armature-side coil body flange 40 with a first joining movement 1.
• the magnetic core 30 is inserted in a straight line from the end face remote from the anchor into the coil body 34 with a second joining movement 2.
• the third joining movement 3 is used Folding armature 26 with the front-side actuation extension 24 running in its plane pushed straight into the armature-side coil body flange 40 until it is embedded in the bearing recesses 64 and 65 with lateral bearing projections 62 and 63 arranged in its rear pivot axis.
• a fourth assembly step with a fourth joining movement 4, the yoke 28 with its first yoke leg 54 is inserted in a straight line on the front side between the end face and the lateral overhangs 58 and 59 of the bobbin flange 41 facing away from the armature, until the second yoke leg 56 in the lateral recesses 60 and 61 the coil body flanges 40 and 41 lie in and, with their inner surface, faces the end face 66 of the hinged armature 26 on the swivel axis side.
• a leaf-shaped clamping spring 68 is inserted between the outer surface of the first yoke leg 54 and the lateral overhangs 58, 59 in a straight-line manner.
• the folding armature magnetic drive 16 is thus available as an assembly module which is easy to handle and can be used further.
• the joining movements 1 to 5 run parallel or perpendicular to each other and can easily be carried out by assembly robots.

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• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Electromagnets (AREA)
• Reciprocating, Oscillating Or Vibrating Motors (AREA)
• Shearing Machines (AREA)
• Manufacture Of Motors, Generators (AREA)
• Removal Of Insulation Or Armoring From Wires Or Cables (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=7752331

Family Applications (1)

Country Status (7)

Cited By (1)

Citations (4)

Family Cites Families (3)

• 1995
  • 1995-01-26 DE DE19502322A patent/DE19502322C1/de not_active Expired - Lifetime
• 1996
  • 1996-01-12 CZ CZ963144A patent/CZ284845B6/cs unknown
  • 1996-01-12 AT AT96901262T patent/ATE181457T1/de active
  • 1996-01-12 HU HU9602611A patent/HU220733B1/hu not_active IP Right Cessation
  • 1996-01-12 JP JP8522579A patent/JP2968341B2/ja not_active Expired - Fee Related
  • 1996-01-12 EP EP96901262A patent/EP0753199B1/de not_active Expired - Lifetime
  • 1996-01-12 WO PCT/EP1996/000116 patent/WO1996023314A1/de not_active Ceased

Patent Citations (4)

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