DE7119396U - Trip device for electrical switches - Google Patents

Description

56/71 V / egg / os

AKTIENGESELLSCHAFT BROVJN BOVERI & CIE., BADEN (Switzerland)

Tripping device for electrical switches

The invention relates to a tripping device for electrical switches with a locking member designed as a roller, which is under mechanical "bias" Actuating Gliod is connected, the locking member in the locked State of the release device due to the magnetic force of a release holding magnet in an unstable equilibrium position is held.

From the Swiss patent specification 315 719 ^ iSt a device for the protection of periodically moving contact devices against interference from fault currents become known at v / elcher a tension member under the action of a spring is supported with the aid of a rolling element and an abutment. Here the rolling element is held in the blocking position by the hinged armature of a magnet. The anchor to be moved is relatiy large, which makes the release process with a certain inertia

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provided goes. Furthermore, the hanging support of the tension member on the rolling element by means of a cutting edge and crossbar in this version is relatively complicated. From the German Auslegeschrift 1 119 982 is a release device known for electrical high-speed switches, which has locking elements designed as a roller, which in the locked state of the switch are held in an unstable equilibrium position by magnetic forces. Here are the for the blocking used roles at the same time the anchor of the holding magnet. Thereby one is in the choice of the material for the roles on the one hand with regard to. low misery and on the other hand, limited in terms of magnetic properties.

The object of the invention is to improve at the outset mentioned release device, whereby in addition to a simple and cheap solution a safe and fast working, as well as wear-resistant design is sought. According to the invention this is achieved in that the role in a is guided angled link and is articulated to the actuator that its bias is a ratio to the latter low force component on the armature of the release holding magnet exerts in the tear-off direction.

The drawing shows an exemplary embodiment of the invention.

Pig. 1, shows the release device in elevation, partially j
[cut,

Pig. 2 shows a plan section along section line A-A in Fig, I.

Pig. 3 shows the detail of a variant of FIG. 1 and FIG. 4 shows the detail of a further variant in which the locking member and the magentanker are closely connected to one another.

In FIGS. 1 and 2, the holding magnet 2 is arranged in a divided housing 1, the armature 3 of which is hinged to the locking roller 5 by means of tabs 4. On the other hand, the roller 5 is articulated to the actuating rod 7, which is guided in a support tube 5, via brackets 6. The role ν ± tt in an angled gate 9, which is incorporated in a guide plate 10, out. The lower angled part of the gate 9 has a slight inclination towards the horizontal, whereby in the locked state the force acting upwards (arrow direction) on the actuating rod 7 has a small horizontal component on the armature 3 of the holding magnet in the tear-off direction. This makes it possible to keep a relatively large tensile force on the actuating rod 7 in equilibrium with a relatively low magnetic holding force. To trigger the. Holding magnet 2 issued a de-excitation pulse in a manner known per se, whereby the armature 3 can fall off. The unlocked position of the release device is indicated by dash-dotted lines.

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In FIG. 3, the same references as in FIGS. 1, 2 are used for corresponding parts. In this version the lower angled part of the link 9 is horizontal and parallel to the pulling direction of the magnetic cavity 3 oriented, but the tab 6 in the locked position has a slight inclination against the vertical pulling direction of the actuating rod 8. In this way, a horizontal force component in the tear-off direction of the armature 3 is generated.

In the embodiment of FIG. M, the tab 6a is designed in such a way that it also carries the magentanker 3. This results in a particularly space-saving and cheap arrangement - with v: eloher any guide parts for the map; entanker 3 can be dispensed with. May be in all embodiments of Figs. 1 to h the return of the trip device takes place in the locked position after triggering in a known manner by a non-illustrated resetting device, v / oak, for example, as a pneumatic restoring piston formed and acts on the actuating rod 7.

Claims (2)

- 5 - 56/71 »claims 1. Trip device for electrical switches rr.it as a role trained locking member, which with an under mechanical Bias-standing actuator is connected, the locking member in the locked state of the release device by the magnetic force of a release holding magnet is held in an unstable equilibrium position, characterized in that the roller (5) in an angled link (9) is guided and is articulated to the actuator (7) in such a way that its bias is an im Relation to the latter low force component exerts on the armature (3) of the release Ka ^ magnet (2) in the tear-off direction. 2. Release device according to claim 1, characterized in that that in the locked state the abutment for the roller (5) forming part of the link (9) against the direction of pull of the armature (3) is slightly inclined. Release device according to claim 1, characterized in that the part of the link (9) which forms the abutment for the roller (5) in the locked state runs parallel to the pulling direction of the magnet armature (3) and the roller (5) attaches to the actuating element ( 7) by means of a slightly against the - 6 - Γ> 6/71 Direction of pulling of the actuating clip; of the ceneicten lever (6,6a) is hinged. AKTIEMGESELLSCHAPT BROV / N, BOVERI h CIE