EP1188172A1 - Snap-action mechanism for electrical switchgear - Google Patents
Snap-action mechanism for electrical switchgearInfo
- Publication number
- EP1188172A1 EP1188172A1 EP00935117A EP00935117A EP1188172A1 EP 1188172 A1 EP1188172 A1 EP 1188172A1 EP 00935117 A EP00935117 A EP 00935117A EP 00935117 A EP00935117 A EP 00935117A EP 1188172 A1 EP1188172 A1 EP 1188172A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spring
- drive
- connecting rod
- drive shaft
- snap
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/001—Means for preventing or breaking contact-welding
-
- 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
- H01H5/06—Energy stored by deformation of elastic members by compression or extension of coil springs
Definitions
- the invention relates to a spring drive for electrical switching devices, in particular for medium-voltage switchgear.
- switch disconnectors generally require an indirectly acting drive to ensure that the switching is always carried out at the same and sufficient speed regardless of the operator.
- indirect drives there are the jump drives, with the help of which the sudden switching takes place via a charged energy store
- a jump drive device for the sudden switching on of an electrical switching device with a spring energy store (drive spring), which is tensioned in connection with a drive shaft and acts on the switch shaft after it has been released by exceeding a dead center position is known from DE 28 50 761 C3.
- This spring drive device has a non-rotatably connected actuating and tensioning disk for a drive spring arranged in a plane substantially transverse to the drive shaft and a rotatably mounted transmission element mounted on the drive shaft and articulated on the drive spring on the drive shaft side. This in turn is connected to the switch shaft of the switching device via a connecting rod.
- the drive shaft When the drive shaft is actuated by an operator and the energy consumption and voltage associated with it and the position of the drive shaft is exceeded until its dead center position is exceeded, its spring force is released suddenly, i.e. at high speed, and acts on the switch shaft of the switching device via the transmission link and connecting rod.
- the actuating and tensioning disk interacts with the hinge pin connecting the drive spring to the transmission member and has a sector-shaped cutout to form a movement path limited in length and of driving flanks for this and thus also for the transmission element and the anti-friction spring
- the actuating disk When the switching device is switched off and also when the drive shaft is actuated, the actuating disk is also rotated while driving the hinge pin and forcibly moves until the dead center is reached, absorbing energy in the drive spring. After the dead center is exceeded, the drive spring relaxes with the release of spring energy abruptly and independently of the operator's action, so that, depending on the design of the switch, the same switching energy and switching speed are always available and the opening and closing of the contacts of the switch ultimately take place independently of the operator's subjective influences
- a disadvantage of this drive is that failure can occur when the drive shaft is actuated in the switch-off direction and the drive spring can probably reach a stable position via the dead center and behind it, but without the contacts being separated, since the contacts are separated required switching energy, especially with a higher short-circuit power with accordingly higher contact forces or switches that have not been adequately maintained for a longer period of time, and the drive spring is not available. Although the position reached is stable, the spring drive is not in its defined end position for a complete switch-off Position, the switch remains closed
- the invention has for its object to design a spring drive for electrical switching devices according to the preamble of claim 1 so that when switching off the switching device, the required breaking force to overcome the contact forces is reliably applied and transmitted
- the invention then consists in that, in the case of an essentially a drive shaft with an actuating disk arranged in a rotationally fixed manner therefor for a drive spring and a rotatably mounted on this drive shaft and articulated on the drive spring transmission element, which acts via a connecting rod on the switch shaft, having a spring drive between the transmission member and the connecting rod, a compression spring is provided on one of the two snap-action ancillary parts, which, upon a switch-off movement after exceeding the
- the compression spring is preferably arranged on the transmission member and, for engagement with the connecting rod, is held on a spring guide rod aligned with it.
- the connecting rod can be articulated on the drive shaft side via a pivot pin on a drive lever rotatably mounted on the drive shaft.
- This drive lever then serves as an abutment for the pressure fe - the
- the actuating disk has a circular recess for forming a movement path and driving flanks for a joint pin connecting the secondary spring to the transmission element
- the transmission member also has such a recess for the hinge pin that articulates the connecting rod with the drive lever. This allows the transmission member to be driven in a simple manner, caused by released spring energy, onto the connecting rod
- FIG. 1 shows a spring drive in the switched-on position and FIG. 2 shows the spring drive in a release position for the switch-off
- the spring drive for a switching device shown in FIG. 1 has a drive shaft 1 and an actuating disk 2 connected to it in a rotationally fixed manner with a circular recess 3 with two driving flanks 4 for a hinge pin 5, which is arranged on a spring guide rod 6 perpendicular to the drive shaft 1 Antnebsfeder 7 and a rotatably mounted on the drive shaft 1 transmission member 8 is arranged, which is operatively connected via a connecting rod 9 with the switch shaft of the switching device, not shown.
- the Antnebsfeder 5 is supported on its side facing away from the drive shaft 1 on an abutment 10, which has a recess 11 for the spring guide rod 6.
- the transmission link 8 which is designed as a double lever, is also provided with a circular recess 12 for forming a path of movement and with driving flanks 13 for a hinge pin 14, via which the connecting rod 9 is connected to one of the A drive shaft 1 rotatably mounted drive lever 15 is articulated on the transmission member 8, a holder 16 for a slidably arranged spring guide rod 17 is attached, on which a compression spring 18 is arranged.
- the holder 16 is designed so that the spring guide rod 17 is arranged tangentially to the recess 12 and with the Drive lever 15 can be brought into engagement
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19925537 | 1999-06-04 | ||
DE19925537A DE19925537C2 (en) | 1999-06-04 | 1999-06-04 | Jump drive for electrical switching devices |
PCT/EP2000/004760 WO2000075946A1 (en) | 1999-06-04 | 2000-05-25 | Snap-action mechanism for electrical switchgear |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1188172A1 true EP1188172A1 (en) | 2002-03-20 |
EP1188172B1 EP1188172B1 (en) | 2003-03-19 |
Family
ID=7910187
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00935117A Expired - Lifetime EP1188172B1 (en) | 1999-06-04 | 2000-05-25 | Snap-action mechanism for electrical switchgear |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1188172B1 (en) |
AT (1) | ATE235099T1 (en) |
CZ (1) | CZ20014330A3 (en) |
DE (2) | DE19925537C2 (en) |
PL (1) | PL365309A1 (en) |
WO (1) | WO2000075946A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10144105C1 (en) * | 2001-09-03 | 2003-04-17 | Siemens Ag | Switch contact arrangement with a spring force acting in the closing direction and in the opening direction |
DE102007002918A1 (en) * | 2006-10-07 | 2008-04-10 | Uebigauer Elektro- Und Schaltanlagenbau-Uesa Gmbh | Load disconnector for operating switching contact of medium voltage system, has blocking device provided for spring force drive, which maintains spring in tightening position before reaching dead center positioning of spring |
DE102009035855B4 (en) * | 2009-07-31 | 2011-12-08 | Siemens Aktiengesellschaft | Electrical switching device with a jump drive |
DE102016214783A1 (en) * | 2016-08-09 | 2018-02-15 | Siemens Aktiengesellschaft | Jump drive and switching device with jump drive |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2850761C3 (en) * | 1978-11-23 | 1981-12-24 | Felten & Guilleaume GmbH, 5000 Köln | Jump drive device for electrical switchgear |
-
1999
- 1999-06-04 DE DE19925537A patent/DE19925537C2/en not_active Withdrawn - After Issue
-
2000
- 2000-05-25 PL PL00365309A patent/PL365309A1/en unknown
- 2000-05-25 EP EP00935117A patent/EP1188172B1/en not_active Expired - Lifetime
- 2000-05-25 AT AT00935117T patent/ATE235099T1/en not_active IP Right Cessation
- 2000-05-25 DE DE50001506T patent/DE50001506D1/en not_active Expired - Fee Related
- 2000-05-25 WO PCT/EP2000/004760 patent/WO2000075946A1/en not_active Application Discontinuation
- 2000-05-25 CZ CZ20014330A patent/CZ20014330A3/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO0075946A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE19925537A1 (en) | 2000-12-21 |
EP1188172B1 (en) | 2003-03-19 |
DE19925537C2 (en) | 2002-01-03 |
ATE235099T1 (en) | 2003-04-15 |
CZ20014330A3 (en) | 2002-10-16 |
DE50001506D1 (en) | 2003-04-24 |
PL365309A1 (en) | 2004-12-27 |
WO2000075946A1 (en) | 2000-12-14 |
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