DE1011969B - Switch lock for automatic switch - Google Patents

Description

Switching devices for automatic switches are known in which by a snap spring mechanism it is ensured that the switching on and off of the contact apparatus is independent of the actuation the handling takes place in a clearly predetermined manner.

The subject of the invention described below is such a switch lock for electrical Circuit breaker in which the work necessary for the drive is carried out via one or more switching springs acts on a toggle lever system with free release that actuates the control shaft. With such a switch lock, especially for switches with high switching capacity and correspondingly large contact pressure forces mostly the trip-free major difficulties. You mustn't need too much strength because the Release elements can only deliver modest release forces.

In the switch lock according to the invention, the release takes place in a known manner by breaking down a two-part lever. In the arrangement according to the invention, the forms for the trip-free release provided two-part lever the part lever mounted in a fixed pivot point of the first two toggle systems connected in series. The part articulated in the knee joint has the Free release device at its end forming the knee joint, two free approaches. On one of these The release elements work free approaches, while the other after self-release the willingness to release of the device. The low forces of the release elements are interposed an energy storage device transformed to the extent required to actuate the release mechanism. The second free end of the part of the lever has the task after the self-release when the control handle is returned to the off position, the pretensioning and again bring about the latching of the release force accumulator.

In order to give the switch full safety, care must be taken that it is switched on again after Self-tripping is impossible before the switching device and the tripping mechanism are ready to be switched on again is ready to trigger again. This is achieved in the subject matter of the invention in that the control handle must always be returned to the zero position after triggering, first of all the The toggle system is rebuilt, secondly the switching springs are pretensioned, thirdly the energy storage fields the energy storage lever is tensioned and fourthly the energy storage lever is latched. He follows For some reason the energy storage lever is not latched, it becomes the second knee switch lock for self switch

Applicant:

Klöckner-Moeller electricity company with limited liability,
Bonn, Immenburgstr. 7-11

Erhard Pietsch, Bonn,
has been named as the inventor

lever locked and a closing movement of the contact apparatus prevented.

In Fig. 1 to 3, the structure and the mode of operation of the quick-change device is explained in more detail.

Fig. 1 shows the switching device in the switched-off state,

Fig. 2 in the circuit and

Fig. 3 in the intermediate position after self-release.

The switch handle 1, mounted in the fixed pivot point 2, acts via one or more switch springs 3 on a toggle lever system. This toggle lever system consists of a lever mounted in the fixed pivot point 4 and designed in two parts for the purpose of release - support lever 5 and angled lever 6 - as well as lever 8 mounted in the knee joint 7 of a second toggle lever system 8 acts on the second toggle system consisting of the angle lever 11 mounted in the fixed pivot point 10 and the lever 12. The lever 12 acts at the fulcrum 13 on the contact piece carrier 15, which is rotatable about the fixed bearing point 14, and thereby actuates the contact device 16, 17 shown schematically in the figures.

The pivot points 2 and 4 as well as the knee joints 7 and 9 and the spring suspension 1 α in the handle 1 are assigned to each other in such a way that during the switch-on movement of the handle 1 initially only the springs 3, which can already have a certain bias, are tensioned without the toggle systems and the contact device are operated. Shortly before reaching the switched-on position, the spring suspension 1 α, 9 exceeds the dead center position 9, 4, and the springs release their stored energy for actuating the toggle lever systems. The switch-on process is now initiated and

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flow completed by the operator (Fig. 2). The knee joint 9 strikes against the fixed stop 18 so that the springs 3 are completely relaxed is prevented. The switch-off process is analogous, in which the switch handle moves in the opposite direction will.

For self-release and release, the levers 5, 6 are provided, which are rotatably connected at the pivot point 19 and, under the action of the springs 3, form a rigid part in which the angle lever 6 with a stop 6 α against a corresponding stop 5 a of the support lever 5 is pressed. The stops can be adjustable. To trigger the angle lever 6 is knocked out of the extended position, so that the lever system 5, 6 collapses. The now released residual energy of the spring opens the contact device 16, 17 via the lever 8 and the second toggle lever system 11, 12. At the same time, the handle is moved into an intermediate position until a stop roller

20 strikes against a serving as a guide surface approach 1 c of the handle 1 (Fig. 3).

In order to obtain the necessary release forces, an energy storage lever 21 is provided between the release element (bimetal, quick release, zero voltage release) and release release. In the ready-to-release state, this force storage lever 21 is latched to a lug 21 α by the release pawl 22 with the return spring 23 on which the various release elements act. He is under the action of the force storage spring 24, which rotates him clockwise after releasing the latch by the release elements, not shown, so that he is with his nose

21 & against the one free leg approach 6 c of the angle lever 6 strikes and the collapse of the lever system 5, 6 causes.

To switch on again after self-triggering, the quick switching device must be made ready to switch on by returning the switch handle 1. Here, the contactor lever 5 is rotated into the switched-off position by the approach Ic until the lever system 5, 6 is brought back into the extended position, and the switching springs 3 are brought to bias. At the same time, the energy storage lever 21 must be set in readiness for release by this movement. This is the purpose of the stored in the fixed pivot point 10 crank lever 11 and the second free leg approach 6b of the angle lever 6. Due to the clockwise moving free Endella of the angle lever, which is located in the closed space within a suitably shaped recess 21d of the force accumulator lever 21, after the self-triggering already during the switch-off process by turning the energy storage lever to the left, the energy storage spring 24 is pretensioned. When the control handle is moved back, the energy storage lever 21 is rotated by the second free end 6b of the angle lever 6 until the release pawl can engage. The energy storage lever is ready to be triggered again. , The pawl does not occur 22, prevents the force storage levers 21, the movement in not verklinktem state at the turn ^ can rotate in a clockwise direction, with its nose 21 c by blocking the lever 11 α a switching of the contact system (see. Fig. 1, dashed illustration). Reclosing directly from the intermediate position and if the release mechanism is not ready to release is excluded ^ »* Anyone can use the remote operator as a remote operator; known motor or compressed air drive be provided.

Claims (3)

Patent claims: 1.Switch lock for automatic switch with snap spring mechanism for momentary switching on and off, as well as a double toggle system as a drive for the switching shaft, characterized by a free release device in the first toggle lever of the double system, the partial lever of which is hinged to the knee joint is provided with two approaches, from the one (6 c) is actuated by a force storage lever (21) influenced by the release elements, while the other approach (6 b) leads the release force memory again after the self-release .in readiness for release. ί » 2. Switch lock according to claim 1, characterized in that the energy storage lever (21) lie Closing movement of the contact pieces or the switching shaft locks as soon as the handle for self ^ tripping is actuated in the switch-on direction, '5JfJHe that the energy storage lever is ready for exit again was brought, in which a free nose (21c) of the energy storage lever against ct & s the free end (Ha) of the lever of the second toggle system mounted in the fixed pivot point. 3. Switch lock according to claim 1 and 2, characterized in that the release force accumulator: Self-triggering already during the managed switch-off process through together act of the free end (Ha) of the second knee ^ - lever system is fully or partially biased with the energy storage lever (21). Considered publications: German patent specifications No. 616 133, 593 5 i2, 637, 212 054. 1 sheet of drawings 1 703 587/332 7.