CN106449195A - Facility for actuating an operating handle and electrical switch - Google Patents

Abstract

The invention relates to a device (100) for operating an operating element (910) of an electrical switch (900) having electrical contacts (920, 921). said device (100) comprises an arm (130) for operating a control (910) of said electrical switch (900), said arm (130) being in operative connection with a mechanical bridge (200), The bridge (200) is capable of performing a linear movement along a fixed axis (500), wherein the bridge (200) is composed of a first part (210) and a second part (220) in two parts, and The two parts (210, 220) are movable along a fixed axis (500), the first part (210) of the bridge (200) being operatively connected to the arm (130) and the second A part (220) is held by a spring (600) on said first part (210), and wherein a second part (220) of said bridge (200) is held by a mechanical mechanism along a fixed axis (500) drive.

Description

Devices and electrical switches for manipulating controls

technical field

The invention relates to a device for actuating an operating element of an electrical switch having electrical contacts, and to an electrical switch having such a device.

Background technique

Electrical switches, in particular electrical power switches, are usually switched on and off using an operating element. The actuating element here has at least one "off" and "on" position. The control element is usually operated by an operator. For remote actuation of the actuating element of such an electrical switch, a motor drive is used which can be mounted on the electrical switch and can actuate the actuating element. A distinction is made between motor drives, which are mounted directly on the front of the actuating element, or are formed laterally on the actuating element and are actuated via an arm.

The electrical contacts of the switch can be turned on and off by manipulating the operating member. The electrical contacts of the switch melt due to an overcurrent or overload condition, so that the switch can no longer be switched to the "OFF" position. A dangerous situation arises in the motor drive such that a command to switch the electrical switch to the "OFF" position results in damage to the mechanics of the motor drive or the electrical switch.

There is likewise the danger that the switch remains in a position adjacent to the "OFF" position, so that the operator gets the impression that the electrical switch has been switched off and no longer carries current. In this case, safe actuation of the electrical switch is not possible for the operator.

Contents of the invention

The technical problem underlying the invention is therefore to provide an improved device which can be actuated in a particularly safe manner by the operator of the electrical switch even in the event of melting of the contacts.

The technical problem is solved according to the invention by a device for actuating an actuating element of an electrical switch having electrical contacts. It is provided here that the device comprises an arm for actuating the operating element of the electrical switch, said arm being in operative connection with a mechanical bridge capable of carrying out a linear movement along a fixed axis, wherein said bridge is constituted in two parts by a first part and a second part, and these two parts are movable along a fixed axis, the first part of said bridge is operatively connected to said arm, and The second part is held by a spring on the first part, and wherein the second part of the bridge is driven along a fixed axis by a mechanical mechanism.

The advantage of the device according to the invention is that, when the arm for actuating the control member is jammed or locked, for example due to melting of the electrical contacts, due to the spring in the first position of the bridge A closed connection is formed between the first part and the second part so that damage to the arm is avoided.

In one embodiment of the device, the spring is designed with a spring constant which allows an applied force to be applied during the switching operation that is greater than the reaction force of the electrical switch, but does not exceed the maximum permissible switching force .

In one embodiment of the device, the first part overcomes the spring force and The second part is separated, and the arm does not continue to move in the first direction. It is advantageous here to avoid damage to the arm or the device or electrical switch.

In a further embodiment of the device, the spring is designed as a compression spring, and when the switching operation of the arm driven by the bridge exceeds the reaction force of the electrical switch, Energy is stored in compressed compression springs. Alternatively, the spring can also be designed as a tension spring, and energy is stored in the stretched tension spring.

In one embodiment of the device, the energy stored in the spring moves the arm in a second direction opposite to the first direction. This ensures that, for example, the actuating element is also moved into the "on" position when the contacts melt, and thus prevents the operator from reading an incorrect state of the actuating element of the electrical switch.

In a further embodiment of the device, a movement of the arm in a first direction moves the actuating element of the electrical switch towards the "OFF" position, and a movement of the arm in a second direction causes the The control member of the electrical switch moves toward the "on" position.

In one embodiment of the device, the mechanical mechanism comprises a driven wheel with a pin, wherein the pin cooperates with a projection on the second part of the bridge in order to drive the bridging piece.

The technical problem is also solved according to the invention by an electrical switch having an actuating element for switching the electrical switch and the aforementioned device according to the invention, wherein an arm of the device surrounds the the operating member, such that movement of the arm in a first direction causes the operating member of the electrical switch to move toward the “OFF” position, and movement of the arm in a second direction causes the operating member of the electrical switch to Movement towards the "on" position.

Description of drawings

The above-mentioned properties, technical features and advantages of the present invention, as well as, for example, the manner and method for realizing the described invention will be more clearly and specifically described by means of the following detailed description of the embodiment with the help of the melted drawings. In the attached picture:

FIG. 1 shows a device for operating a control element, said device having an arm and a bridge formed by a first part and a second part;

Figure 2 shows the device for operating the control element when the reaction force of the electrical switch is exceeded;

FIG. 3 shows a device for actuating an operating element with a compressed pressure spring;

4A and 4B show a device for actuating an operating element with a compressed pressure spring;

Figure 5 shows the device for operating the manipulator after the stored energy causes the arm to move in the opposite direction; and

Figure 6 shows an electrical switch with an operating member and an arm.

detailed description

FIG. 1 shows a device 100 for actuating an operating element 910 of an electrical switch 900 having electrical contacts 920 , 921 . The device 100 includes an arm 130 for operating an operating member 910 of an electrical switch 900 . The operating member is shown in detail in FIG. 6 , which shows a switch 900 with electrical contacts 920 , 921 and an operating member 910 . The electrical switch 900 can be switched to an "on" position or an "off" position by operating the control member 910 . According to FIG. 6 , the actuating element 910 is in the "on" position, for example, in the right position, and switches to the left into the "off" position. The control element 910 is thus actuated by the device 100 , ie the arm 130 surrounds the control element 910 and the arm 130 performs a movement to the right or to the left. The arm member 130 has an opening 131 into which the manipulation member 910 protrudes.

According to FIG. 1 , the arm 130 corresponding to FIG. 6 is in operative connection with a mechanical bridge 200 which can perform a linear movement along a fixed axis 500 . The bridge 200 is formed in two parts from a first part 210 and a second part 220 . The first part 210 and the second part 220 are thus also movable along the fixed axis 500 . The first part 210 of the bridge 200 is operatively connected to the arm 130 . According to FIG. 1 , the arm 130 is mechanically rigidly mounted on the first part 210 of the bridge 200 .

The first part 210 of the bridge member 200 is connected to the second part 220 , that is, the spring 600 holds the second part 220 on the first part 210 . The spring 600 according to FIG. 1 is pulled to the right and acts so that the first part 210 and the second part 220 are pressed together. In addition, the device 100 also includes a mechanical mechanism that drives the second part 220 of the bridge 200 along the fixed axis 500 . According to FIG. 1 , the mechanical mechanism comprises a drive wheel 800 with a pin 810 , wherein said pin 810 cooperates with a projection 221 on the second part 220 of the bridge 200 . Protrusions 221 according to FIG. 1 protrude from the lower part of the second part 220 of the bridge 200 so that the pin 810 can push the bridge 200 in the first direction 510 according to FIG. 1 when the drive wheel 800 rotates.

The spring constant of the spring 600 is designed such that the force exerted by the spring 600 during a switching operation is greater than the reaction force of the electrical switch 900 . This means that the selected spring constant is such that the first part 210 and the second part 220 of the bridge 200 are compressed by the spring 600 without melting, for example, of the contacts 920, 921 during normal and trouble-free switching. together. In the event that the force applied to operate the switch is higher than the reaction force of the electrical switch 900, such as occurs when the electrical contacts 920, 921 melt, the spring constant is configured such that the maximum permissible switching force is not exceeded. That is, when the electrical contacts 920 , 921 are melted, the first part 210 of the bridge 200 is disengaged relative to the second part 220 .

This is shown in more detail in FIG. 2 , where the first part 210 of the bridge 200 is separated relative to the second part 220 as shown. For example, the melting of the electrical contacts 920 , 921 leads to the inability of the actuating member 910 to switch completely to the “OFF” position due to the melting of the electrical contacts 920 , 921 . In this case, it may occur that the first part 210 separates relative to the second part 220 when the pressure spring 600 is compressed. This means that the arm 130 no longer moves in the first direction 510 , but energy is stored in the compressed compression spring 600 .

In FIG. 3 it is shown that the second part 210 of the bridge 200 is further away from the first part 210 than in the view in FIG. 2 . This allows more energy to be stored in the spring 600, which is compressed further as a compression spring.

FIG. 4A also shows a bridge 200 having a first part 210 and a second part 220 that are separated based on the contacts 920 , 921 becoming stuck (eg, due to melting).

FIG. 4B shows a view of arm 130 , which can actuate actuating element 910 of electrical switch 900 , and likewise shows bridge 200 with first part 210 and second part 220 separated from one another.

It is shown in FIG. 5 that the energy previously stored in the spring 600 is released and the bridge 200 moves along the fixed axis 500 in a second direction 520 opposite to the first direction 510 . The pin 810 no longer interacts with the projection 221 on the second part 220 of the bridge 200 because the pin 810 is spatially separated from the bridge 200 due to the circular movement of its drive wheel 800 , so that it no longer cooperates.

The energy in the compressed pressure spring 600 is already great, so that the arm member 130 pulls the operating member 910 back to the initial position. This is usually the "on" position, thereby indicating to the operator that the device 100 cannot switch the electrical switch 900 to the "off" position. The position of the actuating element 910 thus corresponds to the state of the electrical contacts 920 , 921 which cannot be separated from one another due to melting. The operator then knows that the electrical switch 900 has a malfunction and can purposely overcome the malfunction.

The device 100 can have a tension spring instead of a compression spring, wherein the energy of the driven arm 130 is stored in the form of tension spring tension.

Advantageously, it is avoided that the device 100 exerts an excessive force on the control member 910 by the motor drive device in order to operate the control member 910 of the electrical switch 900 , so that the switching mechanism of the electrical switch 900 is damaged. Likewise, the device 100 also ensures that the position of the manipulation member 910 corresponds to the actual physical state of the contacts 920 , 921 . Damage to the motor drive is also avoided by device 100 when contacts 920 , 921 melt. For example, the arm 130 has a certain length when the device 100 is assembled on the switch 510 from the side, thereby also having a certain degree of leverage, so that the switch can be deformed or bent. The state according to FIG. 5 clearly shows to the operator that there is a fault in the electrical switch 900 . In addition, the fault can also be queried via the microswitch, so that the remote access shows that the electrical switch 900 has a malfunction.

Claims (9)

1. an equipment (100), has the behaviour of the electric switch (900) of electrical contact (the 920th, 921) for operation Control (910), it is characterised in that described equipment (100) includes for operating described electric switch (900) The arm-piece (130) of manipulation part (910), described arm-piece (130) is with mechanical bridgeware (200) formation effect even Connecing, described bridgeware (200) can implement the linear movement along fixing axis (500), wherein, described Bridgeware (200) is made up of in two style first component (210) and second component (220), and the two portion Part (the 210th, 220) can be along fixing axis (500) activity, the first component (210) of described bridgeware (200) It is connected with described arm-piece (130) formation effect, and described second component (220) is by described first component (210) On spring (600) keep, and wherein, the second component (220) of described bridgeware (200) is by machinery Mechanism is driven along fixing axis (500).

2. equipment according to claim 1 (100), wherein, described spring (600) design has bullet Spring constant, described spring constant allows when carrying out switching manipulation, makes applied power be more than electric switch (900) reaction force, but it is no more than maximum allowable switch force.

3. equipment according to claim 1 and 2 (100), wherein, when by by described bridgeware (200) The described arm-piece (130) driving carries out having exceeded during switching manipulation the reaction force of described electric switch (900) In the case of, described first component (210) overcomes spring force to be separated with described second component (220), and And described arm-piece (130) does not continues to (510) motion in the first direction.

4. equipment according to claim 3 (100), wherein, described spring (600) is designed to pressure Power spring, and when the described arm-piece (130) being driven by described bridgeware (200) carries out switching manipulation In the case of having exceeded the reaction force of described electric switch (900), energy is stored in the pressure being extruded In spring.

5. equipment according to claim 3 (100), wherein, described spring (600) is designed to draw Power spring, and when the described arm-piece (130) being driven by described bridgeware (200) carries out switching manipulation In the case of having exceeded the reaction force of described electric switch (900), energy is stored in the pulling force being stretched In spring.

6. the equipment according to claim 4 or 5 (100), wherein, are stored in described spring (600) In energy make described arm-piece (130) inversely in first direction (510) (520) in a second direction motion.

7. equipment according to claim 6 (100), wherein, described arm-piece (130) is in the first direction (510) motion makes the manipulation part (910) of described electric switch (900) move towards " shutoff " position, and And the motion of described arm-piece (130) (520) in a second direction makes the manipulation part of described electric switch (900) (910) towards the motion of " on " position.

8. the equipment according to according to any one of the claims (100), wherein, described mechanical mechanism Including the powered wheel (800) with pin (810), wherein, described pin (810) and described bridgeware (200) the projection (221) on second component (220) acts on jointly, in order to drive described bridgeware (200).

9. an electric switch (900), has the manipulation for carrying out switching manipulation to electric switch (900) Part (910) and the equipment (100) according to according to any one of the claims, wherein, described equipment (100) Arm-piece (130) surround described manipulation part (910), thus the fortune of described arm-piece (130) (510) in the first direction The dynamic manipulation part (910) making described electric switch (900) moves towards " shutoff " position, and described arm The motion of part (130) (520) in a second direction makes manipulation part (910) court of described electric switch (900) " connect Logical " position motion.