EP3619732A1 - Snap-action switch having a current-conducting snap-action spring, method for producing such a snap-action switch, and overload relay and tripping indicator having such a snap-action switch - Google Patents
Snap-action switch having a current-conducting snap-action spring, method for producing such a snap-action switch, and overload relay and tripping indicator having such a snap-action switchInfo
- Publication number
- EP3619732A1 EP3619732A1 EP18719879.1A EP18719879A EP3619732A1 EP 3619732 A1 EP3619732 A1 EP 3619732A1 EP 18719879 A EP18719879 A EP 18719879A EP 3619732 A1 EP3619732 A1 EP 3619732A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spring
- snap
- switch
- action switch
- action
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 239000000463 material Substances 0.000 claims abstract description 23
- 238000007747 plating Methods 0.000 claims abstract description 22
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 17
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
- 229910000639 Spring steel Inorganic materials 0.000 claims description 12
- 238000005452 bending Methods 0.000 claims description 12
- 229910052802 copper Inorganic materials 0.000 claims description 12
- 239000010949 copper Substances 0.000 claims description 12
- 238000005253 cladding Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 230000009347 mechanical transmission Effects 0.000 claims description 4
- 239000010970 precious metal Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000004080 punching Methods 0.000 claims 1
- 230000000284 resting effect Effects 0.000 abstract 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 229910000510 noble metal Inorganic materials 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 229910000952 Be alloy Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910052790 beryllium Inorganic materials 0.000 description 2
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
- H01H83/22—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being unbalance of two or more currents or voltages
- H01H83/223—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being unbalance of two or more currents or voltages with bimetal elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
- H01H5/04—Energy stored by deformation of elastic members
- H01H5/18—Energy stored by deformation of elastic members by flexing of blade springs
- H01H5/20—Energy stored by deformation of elastic members by flexing of blade springs single blade moved across dead-centre position
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
- H01H71/7427—Adjusting only the electrothermal mechanism
- H01H71/7445—Poly-phase adjustment
Definitions
- Snap-action switch with a current-carrying spring method for producing such a snap-action switch and overload relay and tripping alarm with such a snap-action switch
- the invention relates to a snap-action switch with a current-carrying spring according to claim 1, a method for producing such a snap-action switch according to claim 10 and an overload relay and a tripping alarm with such a snap-action switch according to claim 11 or 12.
- British patent application GB 669969 A discloses a spring for an electrical snap-action switch comprising a spring steel core plated with a thin layer of copper.
- the thickness of the copper cladding is chosen such that it has a much higher electrical conductivity than the spring steel core, but whose resilience does not significantly affect. However, the disturbing effect of the plated-on copper can cause an increased production spread.
- German patent application DE 3530221 AI a miniature switch is known which has a movable spring plate which is plated in a contact area with fixed contacts with a noble metal such as silver, gold or an alloy thereof, to the electrical conductivity at the corresponding interfaces increase and at the same time establish a moving contact with extremely reduced thickness on the movable spring plate.
- U.S. Patent US5,121,095 discloses a thermal motor protection switch having a bimetal provided with a silver plating in a contact area to improve contactability. Object of the present invention is therefore to improve a snap switch with a current-carrying spring.
- One of the present invention underlying idea is to produce the current-carrying spring of a snap switch of a multi-layer plated material, and to displace the plating on at least one adjustment point of the spring or not even provide, as well as to deform the spring during assembly in snap switch, so that by means of precise shaping during the assembly process a defined jump movement is made possible and in particular the jump switch is adjusted accordingly.
- the cladding is in this case provided over a large area and in particular displaced or not provided only at the or the Justagestelle (s), so that the best possible electrical conductivity for a current flow over the spring and a precisely defined jump movement by a good deformability at or the adjustment point (s) can be ensured, in contrast to a plating only at a contact area to improve the contact ability.
- the cladding comprises one or more metal layers, which preferably have a better electrical conductivity than a base material or the base layer on which the cladding is applied.
- the plating may have a layer of a non-ferrous metal and / or a layer of a noble metal, while the base material or the base layer may be made of a spring material such as an elastic metal, in particular a spring steel.
- the present invention differs in the shape of the formed of a multilayer material spring, wherein the plating with the better conductive material at the or the Justagestelle (s) of the spring, ie in particular Partially or completely displaced or absent at bending and / or buckling points, so that the core of the spring, the actual spring material, can receive the desired deformation. This ensures that the spring material can be deformed defined and so manufactured springs have a lower manufacturing dispersion.
- the carrier of the spring forming leaf spring may be individually deformed individually in a semi-assembled snap-action switch to reduce manufacturing tolerances of the spring in the operatively connected functional chain of a device incorporating the snap-action switch and the multiple parts / or assemblies may have to balance.
- An embodiment of the invention now relates to a snap-action switch which has a current-carrying spring which can be brought into two rest positions by mechanical actuation and is made from a multilayer clad material, the cladding being partially or partially connected to adjustment points of the spring completely displaced and / or is not present vo, and wherein the jump switch is adjusted by the fact that the spring has been deformed at the adjustment points during assembly in the snap switch.
- the current-carrying spring Before mounting in the snap-action switch, the current-carrying spring may already be pre-bent, which may facilitate, for example, the installation of the snap-action switch.
- the cladding may comprise at least one layer of a non-ferrous metal and / or a layer of a noble metal.
- the plating can thus be formed in the simplest case single-layered, for example, a plating with a layer of non-ferrous metal such as copper, or a plating with a layer of precious metal such as silver, or it may be formed multi-layered, for example with a first layer of non-ferrous metal and a second layer of precious metal , A multi-layer plating can be selected, for example, to achieve a specific electrical conductivity of the spring.
- the non-ferrous metal, in particular copper, and the current-conducting spring in particular, can be produced from a spring-steel strip clad on both sides with copper by stamping and, if necessary, pre-bending.
- the spring may have been fixed in the assembly of the snap-switch, for example, at one, two or three ends either under tension or fixed tension and a voltage of the spring after fixation have been generated, and / or the jump switch can by buckling and / or bending the spring or to be adjusted on a support of the spring.
- the non-ferrous copper may be the spring a defined copper layer so that the spring has a total of a low resistivity of less than 0.14 ohms * mm 2 / m, and / or the multilayer material, from the spring is made, may have a low resistivity of less than 0.14 ohms * mm 2 / m.
- certain alloys for spring applications have a resistivity less than 0.14 ohm * mm 2 / m and could therefore be used as spring material for the spring to thereby achieve a desired corresponding electrical conductivity.
- the resistivity of the entire spring can be influenced so that a desired electrical conductivity is obtained,
- the plating of the spring may be applied in particular without an intermediate layer on a spring core.
- the spring can be designed for use at higher temperatures, in particular of more than about 100 ° C. This can be achieved in particular by selecting appropriate spring materials.
- the operating temperature of spring steel depending on the variety at 80 ° C to 300 ° C. Since the spring properties of the spring are essentially determined by the spring material, for example the spring steel, and are only slightly influenced by the plating, the operating temperature of the spring is determined substantially by the operating temperature of the spring material.
- the spring can be designed for frequent bending changes. This can be achieved in particular by selecting a suitable spring material, in particular spring steel; For example, is suitable for frequent bending changes or high dynamic loads a copper-beryllium alloy, but it can be achieved by selecting appropriate spring steel grades and higher dynamic load ranges and a spring with such spring steel grades of spring material are designed for frequent bending changes and the corresponding dynamic load.
- a further embodiment of the invention relates to a method for producing a snap-action switch according to the invention and as described herein, wherein the snap-action switch has a current-carrying spring, which can be brought into two rest positions by mechanical actuation, comprising the following steps: producing the spring from a multilayered spring clad material, fixing the spring at at least one end in the jump switch, and deforming the spring at the adjustment points during assembly in the jump switch to adjust the snap switch, wherein a partial or complete displacement of the Plating is carried out on the adjustment points of the spring either during the deformation step or before the deformation step
- the invention relates to an overload relay having an overload trip device, an auxiliary switch having a snap-action switch according to the invention and as described herein, and a mechanical transmission device for transmitting a tripping operation from the overload trip to the jump switch of the auxiliary switch, the transmission device being at a tripping operation causes a movement of the current-carrying spring of the snap-action switch such that the jump switch switches.
- a further embodiment of the invention relates to a triggering device for a switching device, which is designed to signal a tripped state of a mechanically coupled to it switching device, and a snap-action switch according to the invention and as described herein, wherein upon triggering of the switching device via the mechanical Coupling a movement of the current-carrying spring of the snap-action switch is effected so that the jump switch switches.
- FIG. 2 shows a detailed view of the triggering mechanism of the overload relay of FIG. 1;
- FIG. 3 shows a detailed view of the spring of the snap-action switch built into the overload relay of FIG. 1;
- FIG. 4 shows a further embodiment of an overload relay with a snap-action switch, in which the spring is implemented by a leaf spring having an adjustment point formed by a bump according to the invention;
- Fig. 5 shows another embodiment of an overload relay with a snap-action switch, in which the spring is implemented by a leaf spring punched out of a partially plated band, according to the invention.
- Fig. 6 is a plan view of the spring of the built-in overload relay of Fig. 5 snap-action switch.
- the overload release 12 has a bimetallic release per electrical phase, as described for example in DE 3840064 AI, on.
- Increased current flow in the individual phases causes deformation of the bimetallic releases or different current flows in the individual phases, as may occur, for example, in the event of a phase failure, causing corresponding differences in the deformation of the bimetallic releases, resulting in a mechanical failure Transmission device, which will be described in detail below, is operated. This operation in turn causes a trip operation is transmitted to a jump switch of the auxiliary switch 14.
- a tripping operation is thus transmitted from the overload release 12 via the mechanical transmission device to the snap-action switch as described below: during a deformation of the bimetallic releases of the overload release 12, bridges 22 'and 22 "are displaced and an actuating lever 22 is changed in its position (in the example shown moved and rotated) Position change of the actuating lever 22 is transmitted to a release lever 24 in the auxiliary switch 14. Thereby, the trigger lever 24 is moved about an axis of rotation, in such a way that it exerts pressure on a spring-action lever 28.
- the spring-actuating lever 28 presses on the spring 16 (for example, a so-called crackled frog), so that it jumps from a first rest position to a second rest position.
- the spring 16 for example, a so-called crackled frog
- normally closed contacts 18 of the auxiliary switch 14 are closed and normally open contacts 20 of the auxiliary switch 14 are opened.
- the NC contacts 18 are opened and the NO contacts 20 are closed.
- the power supply of the control circuit of the associated contactor and thus indirectly the power supply to the phases of the circuit to be protected can be interrupted. This corresponds to the tripped state in the event of overload or the tripped state in case of phase failure of the overload relay 10.
- a setting mechanism 30 of the trigger threshold which is operatively connected to the temperature compensation strip 26, the transmission of the tripping operation of the overload release 12 in particular to operating conditions of the overload relay 10 in more detail be adjusted.
- Fig. 2 shows the structure of the snap-action switch in the auxiliary switch 14 in detail.
- the actuating lever 22, the release lever 24, the temperature compensation strip 26 and the spring-action lever 28 comprehensive mechanical transmission chain for the transmission of a release operation to the spring 16 is clearly visible.
- the current-carrying spring 16 and its training and storage in snap-action switch and the production of the snap-action switch with this spring 16 will now be described with reference to Fig. 3: the basic shape of the spring 16 is made of a both sides with an electrically conductive non-ferrous metal such as copper-plated Punched out spring steel strip. Before mounting the spring 16 in jump switch, the spring 16 is pre-bent. However, pre-bending is not essential. For assembly, the spring 16 is fixed at its two ends under tension.
- the spring can also be fixed to only one or three ends.
- the fixation of the spring can also carried stress-free, in which case a voltage of the spring is generated only after the fixation, for example by dents.
- Fig. 3 two fixings 161 and 162 at one end of the spring 16 on a support 165 for the spring 16 can be seen.
- the other end of the spring 16 can be fixed separately with an aid during assembly, which is removed after installation again.
- the snap-action switch is now adjusted, in particular by bumping and / or bending at adjustment points 163, 164 of the spring 16 or on a carrier of the spring 16, ie in particular jumping the spring 16 from the first to the second rest position and back set.
- the adjustment points 163, 164 can also be fixed, which can facilitate the deformation. This comes into play that at the Justagestellen 163 and 164 of the spring 16, so at the points where a bending and / or buckling of the spring takes place, the non-ferrous metal plating partially or even completely displaced or even not available. This displacement or non-presence may already have occurred during plating by partial plating, or after plating by deliberately exposing the adjustment points 163 and 164, for example by grinding or buckling, or even only during adjustment, for example by partial removal during bending and / or bumps. The displacement causes the core of the spring 16, so the actual spring material can obtain the desired deformation and the springs 16 have a lower manufacturing dispersion.
- the support of the spring 16 in the partially mounted overload relay or auxiliary switch can be individually easily deformed so as to compensate for any manufacturing tolerances of the spring 16 in an operatively connected function chain.
- Fig. 4 shows the overload relay 10 with the overload release 12 and the auxiliary switch 14, wherein in the auxiliary switch 14 in contrast to the embodiment shown in FIGS. 1 and 2, another embodiment of the spring is used: in this case, the spring 16 'as adjustment point 166 a bump on; the adjustment point is therefore not provided here at the fixations of the spring as in the embodiments of FIGS. 1 to 3.
- the bulge is introduced in particular after installation of the spring 16 'and fixing the same in the auxiliary switch 14, to ensure the most accurate adjustment of the spring 16 'in the auxiliary switch 14.
- FIG. 5 shows the overload relay 10 with the overload release 12 and the auxiliary switch 14, wherein a spring 16 "punched out of a partially plated band is inserted in the auxiliary switch 14.
- the partial plating of the spring is in the plan view of the spring of FIG A portion 161 "which is not plated and extends between two plated regions 162" of the spring 16 “extends approximately in the center of the spring 16. Further, similar to the spring 16 of FIG. 3, adjustment points 163" and 164 "provided.
- the invention allows the production of snap-action switches with lower manufacturing tolerances in the springs used.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017109426.1A DE102017109426A1 (en) | 2017-05-03 | 2017-05-03 | Snap-action switch with a current-carrying spring, method for producing such a snap-action switch and overload relay and tripping alarm with such a snap-action switch |
PCT/EP2018/060543 WO2018202488A1 (en) | 2017-05-03 | 2018-04-25 | Snap-action switch having a current-conducting snap-action spring, method for producing such a snap-action switch, and overload relay and tripping indicator having such a snap-action switch |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3619732A1 true EP3619732A1 (en) | 2020-03-11 |
EP3619732B1 EP3619732B1 (en) | 2023-11-08 |
Family
ID=62046949
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18719879.1A Active EP3619732B1 (en) | 2017-05-03 | 2018-04-25 | Snap-action switch having a current-conducting snap-action spring, method for producing such a snap-action switch, and overload relay and tripping indicator having such a snap-action switch |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3619732B1 (en) |
DE (1) | DE102017109426A1 (en) |
PL (1) | PL3619732T3 (en) |
WO (1) | WO2018202488A1 (en) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL156321C (en) | 1950-09-20 | 1900-01-01 | ||
US4636766A (en) * | 1983-09-19 | 1987-01-13 | Gte Products Corporation | Miniaturized circuit breaker |
JPS6154119A (en) | 1984-08-24 | 1986-03-18 | 松下電工株式会社 | Small-sized switch |
DE3840064A1 (en) | 1988-11-28 | 1990-05-31 | Kloeckner Moeller Elektrizit | Thermal relay having a switching rocker |
JP2519560B2 (en) * | 1990-02-14 | 1996-07-31 | 生方 眞哉 | Thermal switch |
FR2725556B3 (en) * | 1994-10-10 | 1996-08-02 | Philips Electronics Nv | THERMAL ADJUSTABLE ELECTRICAL SWITCHING DEVICE |
DE102009043780B4 (en) | 2008-11-12 | 2011-01-27 | Abb Ag | Electrical overload relay with a swivel mounted rocker |
-
2017
- 2017-05-03 DE DE102017109426.1A patent/DE102017109426A1/en active Pending
-
2018
- 2018-04-25 WO PCT/EP2018/060543 patent/WO2018202488A1/en unknown
- 2018-04-25 PL PL18719879.1T patent/PL3619732T3/en unknown
- 2018-04-25 EP EP18719879.1A patent/EP3619732B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
DE102017109426A1 (en) | 2018-11-08 |
WO2018202488A1 (en) | 2018-11-08 |
EP3619732B1 (en) | 2023-11-08 |
PL3619732T3 (en) | 2024-03-04 |
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