CN1152402C

CN1152402C - Fast connection switching device

Info

Publication number: CN1152402C
Application number: CNB988013266A
Authority: CN
Inventors: 鲁道夫・格拉芬汉; 鲁道夫·格拉芬汉
Original assignee: Siemens AG
Current assignee: Siemens AG
Priority date: 1997-02-03
Filing date: 1998-01-22
Publication date: 2004-06-02
Anticipated expiration: 2018-01-22
Also published as: EP0956578A2; WO1998034258A3; WO1998034258A2; DE19703977C1; EP0956578B1; CN1239584A

Abstract

The invention relates to a switching device with fast activation of the contacts, in order to reduce contact consumption, and thus extend the serviceable life. In accordance with the invention, the latching mechanism (1) of the switching device is fitted with a blocking device (11), which, for the closing process, is first locked, in order to create a free space between a switching element (10) and a switching lever (6) for the travel for the closing process, which is begun by the unlocking of the blocking device (11).

Description

Fast connection switching device

Technical field

The present invention relates to a kind of switching device that has a lever system, this lever system has switch lever and movable switch element that is used to that fixed contact is contacted with moving contact or disconnects, between the motion of this movable switch element and fixed contact and the moving contact contact and disconnection is associated.

Background technology

This class switching device length all has the supply of material for a period of time on electrical equipment market.As shown in Figure 5, the moving contact 22 that this class switching device has a contact slipper 21 and is of coupled connections with it, this moving contact can contact with fixed contact 23.A bimetallic trigger 24 is arranged on the circuit of going to fixed contact 23, and this trigger responds when current overload and breaking-off contact 22,23.This switching device has a lever system for this reason, and its switch lever 25 acts on the upper end of contact slipper 21, and for breaking-off contact 22,23, can overcome the spring action of the contact spring loaded that acts on the slide block lower end, with its past pressing down.Remove to contact slipper 21 at switch lever and to execute when carrying, this contact spring loaded just plays 22,23 the effect of making contact.A kind of like this technical solution is open in DE 92 06 137 U1.Another part German patent application file DE 195 26 591 A1 also disclose a kind of electric switch that has the lever system that bears the spring force effect, and this lever system works to the contact lever that has moving contact and be used to connect.When connecting, between lever system and contact lever, still keeping the coupling contact.By a main contact power (Hauptkontaktkraft), when the active force of lever system diminished, contact point just was switched on.

Disclose a kind of lever system of switching device in EP 0 242 664 A1, it has a switch lever and a depression bar that acts on the contact bridge, and this depression bar is handled by a gathering sill in the switch lever.This depression bar has a kayser projection, and it can disconnect on the contact position by kayser.Be make contact, by rotatablely moving of switch lever, depression bar at first is removed kayser by the adpting flange in the gathering sill, and after depression bar surpassed its dead-centre position, the top guide of depression bar can freely slide in the gathering sill in its place ahead.Need only quicken the motion of contact bridge and depression bar for make contact.

Known switching device is useful on the power switch of ON/OFF and protection motor and other electrical appliance usually, and they have different physical dimensions, this means that they have different breaking capacities.Controlling power switch, that is switch on or off the visual different design of power switch of different structure size utilizes manually or remote control drives turning rod, and bar or knob are realized.Wherein must when switching on or off, power be passed to moving contact from operating element by switch lock.When master cock, must prevent because of the heavier caused slow disconnection of pitting of contacts or connect moving contact and the shortening in useful life of causing thus.For addressing this problem, up to the present people pack in the power switch of higher breaking capacity and have the switch lock of quick-action characteristic, utilize such switch lock can be switched on or switched off the contact rapidly.And the simpler switch lock that does not have the quick-action characteristic of structure of in the power switch of less breaking capacity, only packing into.Its rapid on/off is realized by when handling switch lock being threaded off.Wherein for quick disconnection, the cut-out in the switch lock has decisive role with the spring force of spring with respect to the spring force magnitude of contact load spring is higher.In this power switch, connect fast and realize that thus promptly must utilize operating element, for example turning rod overcomes a precipitous moment of torsion riser before make contact.The shortcoming of such scheme is, owing to depend on operating element, maneuverability pattern and manipulation speed, connection can not obtain to guarantee fast.

Summary of the invention

Therefore the technical problem to be solved in the present invention is, the switching device of the above-mentioned type is done following improvement,, when connecting, does not rely on operating element that is, maneuverability pattern and work bar, the manipulation speed on turning rod or the knob, just make contact rapidly.

Above-mentioned technical problem solves by a kind of switching device that has a lever system, this lever system has the switch lever that is used to that fixed contact is contacted with moving contact and disconnects and the switch element of an activity, between the motion of the switch element that this is movable and fixed contact and the moving contact contact and disconnection is related, according to the present invention, this switching device also has a blocking mechanism, this blocking mechanism is for make contact locking switch element at first, so that for the whole movement travel of connection process creates a free space, this connection process is gone to lock and is introduced by blocking mechanism between switch lever and switch element.

According to the favourable improvement structure of the present invention one, described switch element is a hinge bar.In addition, going to lock preferably by being grasped on the roller that rolls along raceway in the switch slab of described blocking mechanism realized.

Description of drawings

The present invention is described in further detail by the accompanying drawing illustrated embodiment below, in the accompanying drawing:

Fig. 1 illustrates the switch lock of the switching device that is in off-state;

Fig. 2 illustrates switch lock band shown in Figure 1 and its contact that still disconnects and be in the connection process;

Fig. 3 illustrates switch lock shown in Figure 1 and is in the lock state, at this moment contacting;

Fig. 4 illustrates switch lock shown in Figure 1 and is in on-state.

Embodiment

Fig. 1 illustrates the switch lock of a switching device, and it for example is the switch lock in a contactor or the power switch.The switch lock 1 that is used to switch on and off not shown contact is in off-state in the drawings.

Switch lock 1 is made up of as profile of tooth swing arm 3 and a lever system that effectively connects with it of operating element a switch slab 2, basically.This lever system comprises that then a claw 4, one pawl type levers 5, have the switch lever 6 and of torsion spring 7 as the extension spring 8 that disconnects with spring.In the diagram off-state, pawl type lever 5 is in the lock state, not with claw 4 engagements.Extension spring 8 and torsion spring 7 actings in conjunction remain on shown position with switch lever 6, and when this position, a hinge bar 10 is maintained at open position as the switch element that is used to disconnect and connect moving contact, just is in the lower position in the diagram.This hinge bar 10 for example also can replace with a contact slipper.

Except the switch lock 1 that is widely known by the people,, act on this blocking mechanism at blocking mechanism of also rotatable supporting 11, one back-moving springs 12 on the switch slab 2 according to the present invention.Lever system links to each other with a roller 13, and this roller 13 can roll in a raceway.When connecting directional control profile of tooth swing arm 3, lever system moves to switch lever 6 shown in Fig. 2 on the position, has a determining deviation a this moment between hinge bar 10 and switch lever 6.Until before this position, blocking mechanism 11 all rotates around rotating shaft 14 by being grasped on the roller 13, make hinge bar 10 be about to be gone lock.When this position, the contact still is in off-state.When further rotation blocking mechanism 11, hinge bar 10 just gone to lock and the effect of unshowned in the drawings contact point spring loaded under move upward to shown in Fig. 3,4 on the position, this moment, the contact was switched on.

State of termination after the connection process that illustrates Fig. 4 finishes, this moment back-moving spring 12 by pre-tensionings, make when switch lock 1 is triggered that blocking mechanism 11 can be returned to shown in Fig. 1 described above on the position.

Spacing a should come to determine like this, that is, should make hinge bar 10 and moving contact go can be driven by the contact spring loaded in the clear together behind the lock at blocking mechanism 11, and can not depend on manipulation speed and locking mechanism ground make contact rapidly.

Although the present invention is illustrated by form of implementation shown in the accompanying drawing, but should consider this be not intentionally the present invention only is confined to shown in form of implementation, and should comprise all possible variation, change and similar design are as long as they are covered by the content of claims.

Claims

1. switching device that has a lever system, this lever system has a switch lever (6) and a movable switch element (10) that is used to that fixed contact is contacted with moving contact and disconnects, between the motion of this movable switch element and fixed contact and the moving contact contact and disconnection is related, it is characterized in that a blocking mechanism (11), it is for make contact locking switch element (10) at first, so that for the movement travel of connection process creates a free space, the connection process is gone to lock and is introduced by blocking mechanism (11) between switch lever (6) and switch element (10).

2. switching device as claimed in claim 1 is characterized in that, described switch element is a hinge bar (10).

3. switching device as claimed in claim 1 or 2 is characterized in that, the lock that goes of described blocking mechanism (11) is realized by being grasped on the roller (13) that rolls along raceway in switch slab (2).