DE1615793A1 - Electromagnetic relay - Google Patents

Description

Patent attorneys Dipl.-Ing, F. ^ eickmann, Dr. Ing.A.Weickmann

Dipl.-Ing. H. Weickmann, Dipl.-Phys. Dr. K. Fincke Dipl.-Ing. F.A. "Weickmann

8 MUNICH 27, DEN

MÖHLSTRASSE 22, CALL NUMBER 483921/22

EW Bliss Company
217 Second Street,
Canton, Ohio, V.St.A.

Electromagnetic relay

The invention relates to a relay and more particularly to an improved relay design,

Relays constructed according to the invention are eminently suitable as a load relay for switching high currents, such as switching a load current of 15 A, If such a case is with the following description accepted. However, be on it pointed out that the invention εφαβ wider applicability and that relays * according to the invention, for example, can also be used for switching low load currents.

The previously known electromagnetic relays include both those of the clapper type and those of the lifting magnet type. With each of these types of lielais, the fixed contacts are usually easily interruptible with the aid of thinner Lead wires connected to terminals, like plug contacts. Such wires are attached to both the fixed relay contacts as well as to the plug contacts.

Relays with a large number of contact sets usually have Insulating bars arranged between the individual contact sets. The purpose of these insulating bars is to Avoid short circuits between the relevant contact sets. Since these insulating bars are normally no further Serve the purpose, separate fastening devices are also required for fastening the switching contact sets required in each case intended.

The aforementioned disadvantages, and others previously known Relay adhesive. Disadvantages become according to the invention Overcome by an improved relay construction with a common fastening bar, the two IC contact sets and electrically isolated from each other.

According to one feature, the relay construction according to the invention contains two sets of switching contacts, each with at least one stationary. and the a movable contact actuating ^

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devices, such as a solenoid, to actuate the movable contact in relation to the fixed contact, and a common isolation mount connecting the two Switch contact sets electrically separates from each other and which carries the fixed contacts of these contact sets.

According to a further feature of the invention, each is fixed Contact is electrically connected to a fixed, electrically conductive contact clip on the one side of the insulating bar is attached.

According to yet another feature of the invention, the insulating web extends from an insulating base plate through which each of the contact clips is pushed through. The 3 "hedgehog parts inserted through the base plate provide plug-in contacts represents that "a plug-in design in electrical plug-in enable parts.

According to yet another feature of the invention, the include means actuating the respective movable contact a lifting magnet with a movable core, the one is able to execute movement running transversely to the insulating web.

The invention is based on the object of providing an improved relay with a simple and robust construction create that sullows an economical production. That improved erfinauiirsce.T.äije relay owns for a long time

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Service life high operational reliability; it

can be assembled easily and quickly from individual parts, those in a mass production by executing none Post-processing more requiring forming or punching processes can be produced '. The contact pressure remains relatively even across the entire range of motion.

The relay contacts are designed in such a way that their individual parts are each provided with devices that provide an accurate Enable the inclusion of a different individual part, so that a compact, uniform structure is obtained, that does not require any subsequent adjustments. The connection terminals consist of connection pins and switch contact busbar parts, which have no interconnections »- This avoids possible peak load points. the movable contacts have a sufficient overshoot, to eliminate or reduce contact bruises. This is necessary for a long contact life. That Relay according to the invention is particularly suitable for use with tungsten load lamps that cause a high inrush current.

These and other features as well as advantages of the invention will be provided below with reference to the description of a preferred embodiment of the invention shown in the drawings explained.

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Fig. 1 shows schematically the preferred embodiment of the relay according to the invention.

Fig. 2 shows in an enlarged view details of the On construction "of the preferred embodiment of the inventive Relay. . ·

Fig. 3 shows partially in section in a plan view The arrangement shown in FIG.

FIG. 4 shows a sectional view along the line 4-4 r entered in FIG. 2 in the direction of the arrows entered there. FIG. 5 shows a sectional view along the line 5-5 entered in FIG. 4, in the direction of the arrows entered there. FIG. 6 shows a sectional view along the line 6-6 entered in FIG. 5, in the direction of the arrows entered there. Fig. 7 illustrates in a partial view a feature of the operation of the relay according to the invention.

FIG. 5 illustrates, in a partial view similar to FIG. 1, a further feature of the operation of the invention Relay. ■. -.- *. "- ■ ·.

First of all, the arrangements shown in FIGS. 1 to 4 will be considered in more detail. In these figures, a preferred embodiment of the relay according to the invention is shown, essentially an electromagnetic actuator E, a contact lifting arrangement F, a right switching contact set G, a left switching contact set H, a common fastening web 1, a base plate J xind a frame yoke K contains.

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The switch contact sets G and H each contain one known as a single-pole double changeover breaker (SP-DT-33) Contact arrangement. Both sets of contacts thus together represent a contact pole arrangement as a two-pole double changeover switch "(.DP-DT-DB) is known. The two contact sets ^ are almost identical, which is why only one, namely, the right contact set G will be explained in detail below. Corresponding items of both sets of contacts each have corresponding reference characters, '- / ie Figures 2, 4, 7, 8 can be seen, contains the contact set G two separate upper fixed contacts 10, 12 and two correspondingly offset lower ones fixed contacts 14,16. Fixed between the top Contacts is an upper movable contact rail 18 and a lower one between the lower existing contacts movable contact rail 20 is provided. The Kontalctschierie carries contacts 22,24, the upper fixed contacts 10,12 are able to touch. In a corresponding ¥ eise the lower movable contact rail 20 carries contacts 26,28, which the able to touch lower fixed contacts 14,16.

The contact rails 18, 20 are through a _{j between them}

- / or. inserted coil spring 30, which with the help of / the two Contact rails protruding lugs 32,34 is held, resiliently biased in opposite directions.

The contact bars 18, 20 are preferably made of copper, and the movable contacts are each between

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Contact and contact bar arranged silver intermediate layer ^ 36 attached to the relevant contact rails, as by a Adhesive connection. The intermediate silver layer preferably has a thickness on the order of 20% of the total Contact height X (see Fig. 8), which is preferably is about 1.016-rom. ■

The upper and lower fixed contacts 10 and 14 are attached to contact leg parts 38 and 40 of a contact bracket B, sB glued * Between each contact and the associated leg of bracket B there is preferably a silver intermediate layer 42 and the lower fixed contact 12 b% v. 16 each fastened together with a silver intermediate layer 42 to contact sections 44 or 46 of a contact clip G and or of an irontact clip A, for example glued on. The total height X (see FIG. 7) of each stationary contact (including the respective intermediate silver layer 42) is preferably on the order of 1.016 mm. .

Contact bracket and retaining bar

The contact clips A, B and G are made of solid, electrical conductive material, such as brass. They run from the fixed contacts of the switching contact set G from each other parallel and through the insulating base plate J through. The protruding through this plate J ends of the relevant Brackets form sine pins 46, 48, 50. These pens are

tight enough to do in a conventional electrical one-way socket to be plugged in. Immediately below the pin 50, as shown in FIG. 2, is another one Pin 52 is provided, which represents the protruding end of a bracket D, which is also made of a solid, electrically conductive material such as brass is made. However, this bracket serves to prevent the to connect electromagnetic actuator E to a voltage source. ·

As can be seen from FIGS. 2 and 3, this is the common fastening Mounting web I, which preferably consists of an insulating material, mechanically above the insulating base plate J attached in such a way that it runs parallel to the contact clips A, B and C. If desired, the web I and the Base plate J represent a uniform structure in which the web I is in the form of a cantilever from the base plate J extends out away. Flat elongated wing insulators 54, 56 serve to hold the brackets A, E and C against one another electrically isolate. The ones from brackets A, B, C and the Layer assembly consisting of insulators 54, 56, after it has been stacked, is attached to the common retaining web I. secured with the aid of suitable screw and nut arrangements 58. The screws run across the Layered structures arranged on both sides of the web I through, specifically preferably in insulating sleeves 60. Above In addition, there are suitable clamping plates 62 and insulating webs 64

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between the clamps and the brackets on either side of the Bracket provided "*

Electromagnetic actuator

The electromagnetic actuator is best seen in Figures 2 and 4. It consists of a lifting magnet with a U-shaped frame 66 made of a suitable magnetic material, a base plate 68 and two upwardly extending legs 70.72 owns. A cover plate 74 made of a suitable magnetic material is fastened to the legs 70 , 72. In the structure under consideration, a coil former 76, which is made of an insulating material, is arranged in a suitable manner. The bobbin .76 ′ contains a cylindrical sleeve 78, one end of which protrudes through a suitable opening 80 provided in the cover plate 74; upper and lower flanges 82, 84 extend radially outward from the sleeve 78. These flanges are used to accommodate the solenoid coil 86. The movable core 88 of the lifting magnet, which has the shape of a cylindrical plunger, is arranged coaxially to the sleeve 78 of the bobbin 76 . With this he is able to perform a back and forth movement along an axis that is almost; proceeds perpendicular to the common retaining web £ * Immediately below 'the core 88 is as shown in FIG sidhj »^ 4 shows a core head 90, which includes a indurchragenden by eine.Öffnung 94 in the Rähmengrundplatte 68% sehaftteil 92nd This

The shaft part is in the relevant opening in a suitable manner attached, e.g. pressed in. The core head x 90 includes one upwardly extending cylindrical shaft part 96 and a top surface 98, which acts as a stop for the downward movement of the core 88 is used. As can be seen from Figures 5 and 6, there is an annular recess 100 in the core head 90, specifically in its pelvic surface. This recess serves to accommodate a shielding ring 1Ö2 in AC operation. The shield ring 102 is preferably on the Core head 90 attached, e.g., press-fitted, as shown in FIG. It should be noted that the top surface 104 of the core head part, which _ the middle, higher "part 96 surrounds coaxially, is lower than the top surface 98, and

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preferably by about 15.24 x 10 mm. This arrangement represents a double pole on the top of the core head; Due to the shielding ring, it has two poles magnetically phase-shifted by 180 relative to one another, which make the movable pole Core with its front surface on the pole front surface of the Allow the core head to be held firmly and thus prevent vibrations or hums caused by the alternating current.

Contact lifting arrangement '

■ ■; -. i

The contact lifting arrangement F contains a U-shaped contact lifting device 110 made of an insulating material. This contact lifter consists of a base plate 112 and two upwards extending legs 114,116 * the base plate 112

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runs across && the core 88, through its center. It is screwed to this core by means of a screw 118 * Between the top surface of the core 88 and a * recess 122 in the lower surface of the base plate 112 there is a washer 120. The outer diameter of this washer 120 is a little smaller than the outer diameter of the recess 122 so that an annular groove 124 between

Disc and recess is formed. This groove 124 is used to do this, the upper end of a helical return spring which is attached to the sleeve 78. That The lower end of the spring in question lies on the top surface the cover plate 74 on. So that the groove 124 centers the Return spring 126.

Each of the upwardly extending legs 114,116 of the Contact lifter 110 includes a rectangular opening 128, which is referred to below as a section. The concerned Cutouts are used to accommodate the upper and lower movable contacts. These contacts will be with With the help of upwardly extending mounting walls 130 held in position, which on the upright Legs 114,116 are attached in a suitable manner.

As can be seen from Figures 7 and 8, the upper and the lower movable contacts of the right switching contact set G in the one provided in the leg 114 of the contact lifter 110 Cutout 128 held. A vertical movement of the moving

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. Abable contacts in the cutout 128 is through an upper Aussclinittf lache 1 34 and limited by a lower cutout surface 136.

Nahmenjoch

The! _{Paralyze yoke IC 1,} as shown in FIGS. 2, 3 and 4, consists of a U-shaped part with two legs 140, 142 that run essentially parallel to one another and an intermediate part or base part 144 that connects them with one another , 142 are fastened at their respective free ends to the insulating base plate J by means of screws. From the base plate J they run in such a way that they surround the switching contact sets Q and H, the contact lifting arrangement F and the electromagnetic actuating element E. The base plate -SB of the lifting magnet frame SC lies with a magnetic insulating plate 143 in between

, on the leg 140; it is by means of screws 15 &

Kei. ■

suitably attached to the Schfiryi4C. An insulating strip 152 is arranged between the upper limb 142 of the yoke K and the common mounting piece I. The insulating strip 152, which preferably has a width essentially corresponding to the width of the limb 142, extends from the insulating round plate J av3 over the . two switches: oii-tal: ts £ ltze Z and "vi: -.-; / eg. Furthermore, 2 .- \ vei openings 54, 155 are provided that are aligned to the legs 114, 115 of the contact lifter 110,

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through the leg 142 and through the insulating tire run, in these openings longitudinal parts 158,160 are guided, when the coil 86 is de-energized through the openings 154, 155 protrude upwards .. Place the long parts 158,160 Safety devices that require manual operation the ^ Glaislcontalcte-enable. .- ■ - ",". '"■ -, .-

Working method -. ■ ··

The contact lifter is in the idle state of the arrangement in its upper, through "the lower edge of the common ■ Bracket web I defined end position, the KoEtakt lifter 110 is held in this position by the bias exerted by the clock spring 126. "The upper movable Contacts 22, 24 are thus resiliently biased. Dardt these contacts remain with the upper fixed contacts 10.12 engaged, by the action of a between the IContalctscliienen or contact bridges 18 and 20 provided spring32. Thus, one over the upper fixed contacts and the contact rail 18 running electrical circuit closed. This state represents represents the idle state of the relay.

Upon energization of the coil 86, the movable core becomes attracted to the core head 90. The core 88 shifts while in the downward direction, as shown in Fig. 8 by an arrow is indicated. The upper cutout area touches the surface

of the contact lifter 110 the top of the upper contact rail 18 so that the electrical contact between the upper movable contacts and the upper fixed contacts is effectively broadened. During the downward movement of the movable contacts, the helical spring 30 exerts a tension that is sealed against the contact surfaces 134 and 13'J, as a result of which the upper contact rail or the upper contact bridge part 18 and the lower contact rail come to rest against the relevant cutout surfaces. Before the core 88 has completed its downward movement and is held magnetically by the core head, the lower movable iContacts 26 and 23 touch the lower fixed contacts 14, II. This completes an electrical circuit running over the lower stationary contacts. The core 8S and also the contact over 110 continue their downward movement together until the core is held magnetically by the core head 30. In the further movement, the spring 30 opposes a resistance, as a result of which the extent of the further movement S (see FIG. 8) measured from the lower contact rail or the lower contact bridge part 20 to the cutout surface 3o is preferably equal to the contact height X. , which, as stated above, is preferably of the order of 1.016 mni. If the coil 86 is de-energized, the contact lifter 110 is moved in the downward direction at corresponding prices, as is indicated in FIG. 7 by an arrow. Forces exerted by the return spring 126 are effective here

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when the contact lifter 110 moves in the downward direction moves, touches the lower cutout surface I36 the lower

Eon talc Tschiene 20. Thus, the electrical connection between the lower movable contacts and the lower fixed contacts effectively interrupted .: Before the Contact Dear 110 reaches its upper end position, \ touch the upper movable contacts 22,24 the fests tehenden contacts 10,12 . This is another over. upper fixed contacts running circuit closed. The koitalct lifter 110 then continues its upward movement, which is limited by the lower edge of the common retaining web I, with the further movement, which is preferably of the order of magnitude of 1.016: mm (see FIG. 7).

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Claims (1)

Claims 1. Electromagnetic relay with two sets of switching contacts, each of which includes at least one fixed contact and one movable contact which, in relation to the fixed contact associated therewith is movable, characterized in that a common insulating holder uncssteg (i) the two contact blocks (G, H) are electrical separates from each other, and that the fixed contacts (10) of these centenary clauses (G, H) on opposite sides this support web (I) are attached. 2. Relay according to claim 1, characterized in that the fixed contact (10) of each IContact set (G, h) electrical is connected to a fixed contact clip (E) made of an electrically conductive material, which . attached to one side of the Ilalterungssteges (i) is, 3. Relay according to claim 1 or 2, characterized in that an insulating base plate (J) is provided, each contact hindurcLgeflil'irt by the bracket (3) such that its hindurchge- respectively by the base plate (J ') as a plug contact part convicted can be used for plugging into an electrical socket arrangement. 009821/0995 • 4. Multi-egg according to one of Claims 1 to 3: characterized in that each contact set also contains at least one second fixed contact (12) which is fastened to a second contact bracket (C), that the contact bracket (B ₁ C) through a Isolierstüclc (56) are attached separately from each other on both sides of the mounting web (I) in a sciiichtbauälinlicher manner. 5. relay according to one of claims 1 to 4, characterized in that that as the device moving the movable contacts (e.) a solenoid with a movable core {88) is provided with the movable contacts (22) is coupled. ' 6. lielais according to claim 5, characterized in, that each der Schaltkontalctsatz - (GjH) at least two fixed Eontacts (10,12) and two movable contacts (22,24) contains, which on an electrically conductive bridge part (18) are arranged, and that the movable core (88) with this Push part (13) is connected in such a way that the two movable contacts (22,24) simultaneously with the two fixed contacts (IQ, 12) come into contact ', 7. Eelais according to claim 6, characterized in that between the core (88) and the bridge part · (i8) a Spring (3ö); is arranged, which is a far movement of the Kernes allows, having the movable contacts with the fixed contacts are engaged. 8. Relay according to claim 6, characterized in that each contact set (G ₁ H) contains two further fixed contacts (14,16) which are arranged opposite the other two fixed contacts (10,12), and that two further movable contacts (26,28) are arranged on a second, electrically conductive bridge part (20) in such a way that they can be brought into contact with the two further stationary contacts (14,16). . 9. Relay according to claim 8, characterized in that a Contact lifting part (F) connected directly to the core (83) is that this contact lifting part (F) contains two cutout openings (128), each of which the first and the second back part (13 or 2C) each of one of the switch contact sets records. 10. Relay according to claim 9, characterized in that between the first bridge part (18) and the second bridge part (20) a spring (30) is provided. 11. Relay according to one of address 5 to 10, characterized in that the holding web (I) extends transversely to the 3evegungsri _Ghtun g of _the lifting magnet core (88). 12. Relay according to one of claims 5 to 10, characterized ^gekenn--: characterized in that the retaining web (I) across the center of the solenoid actuator extending substantially perpendicular to the LewegungsTichtung 'of the solenoid core (38) -arranged is. 13. Relay according to claim It _r. Characterized in that a U-shaped frame (K) with two legs (140 »142) and a hinged connection part (144) is provided that the .Hubmagnet (E) on one of these legs (140) is attached, that the formation of these legs (140, 142) are attached to opposite sides of the insulating base plate (J) and that the leg connecting part (144) is offset from the insulating base plate (J) and runs essentially parallel to it. 009821/0995 to L e r s e i t e