CN1269873A - Protective circuit - Google Patents

Abstract

The invention concerns a protective circuit provided with additional switching function by exciting an electric adjusting component. The excitation signals to said adjusting component (1) are guided, between a first removable plug-type connector (2) and the adjusting component inside a housing, by means of an adapter plug (4; 17) with another removable plug-type connector, such that with the second removable plug-type connector, a protective switch (12) can be inserted in the excitation circuit of the adjusting component.

Description

Protection circuit

Prior art

The present invention relates to a kind of protection circuit that is used for the control of electrical actuators, its classification is seen independent claims.

In " AEG-assists handbook 1, Fundamentals of Electronic Technology " (Elitera publishing house, Berlin, 1972) the 417th, 418 page, introduced the so-called duplicate protection circuit that is used for actuator or electrically powered machine control.Wherein, can be by means of an independent urgent Circuit breaker, the current loop of machine power is cut off at any time.

Advantage of the present invention

The protection circuit of the present invention that belongs to the above-mentioned type with claim 1 feature; its special benefits is; in simple mode; existing socket connection on the power equipment (as foundation DIN-standard) can be expanded; make the control signal of actuator; at first discerptible connector and between the actuator of an enclosure interior, by delivery through a discharge cock that can externally connect.By a discerptible auxiliary socket connection, it and connector above-mentioned are mechanically combined, thereby can obtain a protection circuit at the control loop of actuator.

According to the preferred embodiment of the present invention, the auxiliary multi-tap with two input ends can be plugged on first connector easily, and an available central screw is fixed.Like this, its input end constitutes the control signal that first socket connection is used for actuator, and another input end constitutes second socket connection and is used for discharge cock.The back installation of this circuit is finished by means of simple tool at any time, need not the control of equipment or regulates circuit or mechanical structure is changed.Thereby also just to have avoided at those often be the loaded down with trivial details work of carrying out in the inaccessible equipment such as lead, clamping or soldering of laying comparatively speaking.

Here, control signal is passed through the discharge cock that is connected in series in known manner.In addition, for fear of the interference voltage peak that in switching process, produces, in multi-tap, can connect a diode (Transzorb-Diode), the electrode of its cross-over connection pilot.

Provided form of implementation in the dependent claims with other advantage.

Accompanying drawing

Below illustrated by means of the embodiment of accompanying drawing protection circuit of the present invention.Shown in the figure be:

Fig. 1 is the view of a magnet, and it is equipped with the auxiliary connector that is connected with a discharge cock as electrical actuators;

Fig. 2 is auxiliary multi-tap and view that is used for the plug of discharge cock that has two input ends;

Fig. 3 is an equivalent circuit diagram;

Fig. 4 is second embodiment of multi-tap, and it has two rectangular each other input ends;

Fig. 5 is the detail drawing of multi-tap shown in Figure 4.

Fig. 6 is the equivalent circuit diagram of a multi-tap shown in Figure 4

Embodiment's explanation

Magnet 1 as electrical actuators has been shown among Fig. 1 in the hydraulic system, and it is by first plug 2, connect 3 controlled signals by cable, thus operation actuator.In the present invention, plug 2 is not to be directly connected on the housing of magnet 1 on the corresponding connector, but realizes connecting by a multi-tap 4.

Multi-tap 4 has two input ends: input end 5 connects pilot, and input end 6 is used for being connected with discharge cock by an auxiliary plug 7.Illustrated among Fig. 2 and comprised multi-tap 4, its input end 5 and 6 and the part of auxiliary plug 7.The output terminal 8 of multi-tap 4 directly is inserted on the magnet 1 and by means of screw 9 and is fixed on the magnet 1.In Fig. 1, can see the plan view of this screw 9.The necessary connection that conducts is finished by welding or warpage in inside at multi-tap 4, and other details shown in the figure is not vital for the present invention.

Shown in Figure 3 is the equivalent circuit diagram of protection circuit of the present invention.Wherein, at the tie point 10 of input end 6 and the pilot of the magnet 1 between the tie point 11, can connect or with its disconnection by means of a discharge cock 12.To assist plug 7 to peg graft, the triggering function by selecting corresponding to use condition just can be connected to discharge cock 12 in the existing configuration easily by multi-tap 4.

Between the utmost point 13 and another utmost point 14 of the magnet 1 that is connected with output terminal 8, be mounted with a diode (Transzorb-Diode) 15, be used for the interfering voltage peak of Protection switch process.Tie point 16 is represented ground connection.

In second embodiment shown in Figure 4, multi-tap 17 is modified to the form of two input ends 5 and 6 relation of meeting at right angles mutually by the form of implementation of Fig. 1.Be used for the plug 7 that discharge cock 12 connects, here along vertical plant of magnet 1.

Be multi-tap 17 view in different directions shown in Fig. 5, its input end 5 and 6 is mutually the right angle as shown in Figure 4.Here please referring to explanation to Fig. 2.

Compare with the equivalent circuit diagram among Fig. 3, can see in the equivalent circuit diagram shown in Figure 6, input end 5 is different with 6 geometric direction, and but, the function of circuit is equivalent.

Claims (6)

1) protection circuit has the auxiliary switch function in the control of electrical actuators, it is characterized by:

The control signal of actuator (1), between first discerptible connector (2) and actuator, an enclosure interior through another discerptible connector by delivery like this, that is, a discharge cock (12) can be added in the control loop of actuator (1) by second discerptible connector.

2) protection circuit as claimed in claim 1 is characterized by:

Can be with an auxiliary multi-tap (4 with two input ends (5,6); 17) be plugged on first connector (2), wherein, an input end (5) is formed for first socket connection of control signal, and another input end (6) is formed for second socket connection of discharge cock (12).

3) protection circuit as claimed in claim 2 is characterized by:

Second input end (6) that is used for discharge cock (12) meets at right angles with respect to the socket connection of leading to actuator (1) (8).

4) as the described protection circuit of one of above-mentioned claim, it is characterized by:

Control signal by delivery by being serially connected with the discharge cock (12) of control in the current loop.

5) as the described protection circuit of one of claim 2 to 4, it is characterized by:

At auxiliary multi-tap (4; 17) in, the utmost point (13,14) of the pilot that can be connected with actuator (1) is protected by a diode (Transzorb-Diode) (15).

6) as the described protection circuit of one of above-mentioned claim, it is characterized by:

Actuator is the magnet in hydraulic control and the regulating system in the Motor Vehicle.

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