EP1169721B1 - Motor drive for automatic change-over switch with additional manual emergency operation function - Google Patents

Abstract

The invention relates to a motor drive for an automatic change-over switch that features an additional manual emergency operation function. The inventive drive is provided with a disk with a peripheral cam that engages in a gate plate. Said gate plate is functionally linked with the rotor of the switch via a pin. According to the invention, in the emergency operation mode, a turning handle is introduced into or placed onto the pin to adjust the switch rotor, thereby effecting a relative movement in the axial direction. Said relative movement releases the engagement between the gate plate and the cam. Once the turning handle is removed, said engagement is restored by means of a spring.

Description

The invention relates to a motor drive for automatic Diverter switch and additional manual emergency actuation function, the drive being a disc with rotating Has actuating cam and the actuating cam in a link switching plate engages, which over an axis in mechanical Operative connection with the rotor of the switch is, according to the preamble of claim 1.

Automatic transfer switches with motor drive for connecting a consumer optionally with two energy sources are known. The energy sources mentioned are either the grid feed-in or a grid replacement system, for example an emergency power generator.
Automatic diverter switches are used, for example, in systems in which the power supply may only be interrupted briefly or not. Use is also particularly relevant when the system is far away from a control room and from the operator.

Transfer switches with motor drive are offered by Peterreins Schalttechnik GmbH, Schwabach, in different versions under the name "FMU-MOT".
Known motor drives can also be retrofitted to existing diverter switches. Manual operation is required for emergency operation, for example in the event of a motor failure, with the above-mentioned types being operated manually with an additional rotary handle via a separate axis or additional intervention.

However, it has been shown that, on the one hand, the mechanical Power transmission from the engine to the switch or to the switching elements is complicated, cost-intensive and prone to failure and secondly, high forces are applied in manual mode have to move the engine and transmission. Also the conceivable Removal of the motor drive for manual emergency operation is technically very complex and does not meet the requirements Safety requirements.

From the patent DE41 42 548 C2 is a drive for one Disconnector, in particular for a catenary switch known, the drive one by a motor or by hand contains actuatable drive shaft acting on the switch. A worm gear has a motor which can be driven and a hollow shaft for concentric mounting of the drive shaft on. In the hollow shaft is one the drive and the Hollow shaft separating from each other or stuck together connecting coupling arranged, which when switching from Motor to manual operation, removing the connection mentioned can be disengaged against a positioning force. The execution of a Hollow shaft with internal clutch is constructive complicated and production technology with higher expenses connected, especially if it is taken into account that in Normally the load switch or diverter switch is remotely controlled is motor-operated and manual operation only in exceptional situations he follows.

It is therefore an object of the invention to provide a motor drive for automatic diverter switch and additional manual emergency operation function specify who it is in a simple manner allowed the necessary motor forces on the Switch shaft or the rotor of the switch to transmit, and on the other hand, in a particularly simple manner, decoupling the Motor or gear from the switching rotor allowed so that with compatible effort guaranteed manual switching is.

The construction is to be designed such that a Safe restart when the motor is started up again can be achieved without the risk of blocking the Motor or a destruction of the motor drive or the individual drive elements.

The object of the invention is achieved with a motor drive according to the features of claim 1, wherein the Subclaims at least useful configurations and Training includes.

The basic idea of the invention is constructive implemented to ensure that in case of emergency operation by Inserting or placing a rotary handle on the drive axle, which serves to adjust the switching rotor, a relative movement is executable in the axial direction. Through this Relative movement releases the intervention that existed until then between a known switchgear and a Control cam, which is arranged on the drive pulley. To Such decoupling can then be done using the twist grip or the like means the desired switching between switch positions I-0-II.

By providing suitable spring elements, the detent between the adjusting cams and the shift control plate is restored after removing the rotary handle.
The link switch plate in operative connection with the actuating cam is designed so that regardless of the manual switching position when the motor drive is reactivated, the motor always engages in the subsequent switching direction that is desired and specified.

With the help of the rotary handle described above, which has an actuation extension has in the event of an interruption in the power supply the desired manual emergency switching of the motor drive be performed.

In a preferred embodiment of the invention above the link switch plate, the axis already mentioned radially surrounding, an axially displaceable thrust washer arranged, which comprises a pressure pin and a guide pin.

A so-called switch plate carrier is still on the axle attached, the shift plate carrier on the drive pulley opposite side has a chamfer or bevel.

The axial movement of the thrust washer moves Push pin in the direction of the shift control plate and presses the latter against the chamfer or bevel, so that there is a predetermined tilt angle sets with the result that the backdrop of the cam takes off or the latter emerges from the backdrop.

A helical spring is arranged around the guide pin, which is a spring-assisted return movement of the link switching plate and / or the rotary handle, wherein the guide pin slides movably in a hole in the shift plate and on the thrust washer e.g. by circlips or the like Fastener is fixed.

In the operating state, the link switch plate is essentially parallel to the drive pulley and has lateral, anti-blocking bevels.
The run-on bevels prevent the control cam from hitting the link switch plate if the motor has been brought into the wrong direction of rotation due to incorrect switching in certain switching positions. The run-on bevels, in conjunction with the axial mobility of the link switching plate, allow it to be lifted until the actuating cam of the drive disk engages again in the corresponding link of the switching plate.

The actuation extension of the twist grip has one on the Axis adapted, preferably rectangular or square Cross-section, with a cross pin at the free end of the extension is located, which is against the inner wall of the housing Supports the drive during the desired manual operation.

The cross pin mentioned has a multifunctional effect. It can cover the housing according to the switch positions have matched slots. When the switching axis is pressed in or moving the rotary handle of the actuation extension below the cross pin dips through one of the respective switching positions assigned slots in the interior of the housing and actuated at the same time the thrust washer, i.e. postpones the latter downward. As a result, the push pin also moves in Direction switch plate and spends this through the Effect of the chamfer or bevel in an angular position with the aim the decoupling of control cams and link switch plate.

The now on the inside of the housing cover or Cross pin in contact with the housing opening continues to prevent unintentional pushing out of the switching axis during rotation between the individual switching positions and on the other hand the rotational movement is only free when the link switch plate lifted sufficiently out of the engagement of the actuating cam has been. After the switching process has been completed, press the coil spring fixed to the guide pin the link switch plate back on the drive pulley and additionally the Actuation extension or the switching axis to the outside.

In other words, the construction in terms of Slot or the slots chosen so that this is a depth or have a distance to the housing surface such that the actuation extension has a sufficient axial movement of the Thrust washer and the pressure pin for uncoupling the link switch plate and actuating cams causes the enable the desired manual rotary movement for the emergency actuation.

In an alternative embodiment, without the The basic principle of the invention is abandoned, the axis is longitudinally displaceable performed, the axis at least partially surrounding and connected to this the shift control plate is arranged.

The axis and / or the link switching plate is supported on one Fixed point via a spring, so that when moving axially From the axis with a sliding switch plate, there is an engagement with the setting cam solves. Due to the spring force when lifting the Longitudinal displacement force the engaged state is restored, so that the motor operation of the diverter switch resumed can be.

In this embodiment, the link switch plate also has side bends as chamfers for the Control cam located on the drive pulley.

In one embodiment of the invention, the link switching plate has preferably on the opposite of the shift gate End of stop surfaces for limit switches. The Stop surfaces can also be made using plastic parts with appropriate Shaping, which in turn is itself rotatable, be formed.

In particular, the above-described invention succeeds simple way, the necessary driving forces in one Diverter switch or a switching rotor arranged there transferred and on the other hand in the event of an emergency operation Uncouple the motor drive from the switching rotor, so that the manual switching is possible without hindrance.

The invention is intended to be explained below using an exemplary embodiment and explained with the help of figures become.

Fig. 1

eine Seitenansicht mit Teilschnittdarstellung des motorischen Antriebs mit Antriebsscheibe, Stellnocken und Kulissenschaltblech;

Fig. 2

eine Draufsicht auf die Einheit aus Antriebsscheibe mit Stellnocken und Kulissenschaltblech;

Fig. 3

eine Seitenansicht eines Teils des Antriebsgehäuses mit Druckscheibe und Querstift;

Fig. 4

eine Darstellung ähnlich Fig. 3, jedoch mit Querstift in Betätigungsposition und axial verschobener Druckscheibe;

Fig. 5

eine Draufsicht auf einen Teil des Antriebsgehäuses mit erkennbaren Schlitzen zur Aufnahme des Querstifts;

Fig. 6

eine Darstellung der Anlaufschrägen in Verbindung mit dem Stellnocken auf der Antriebsscheibe; und

Fig. 7

eine prinzipielle Darstellung eines weiteren Ausführungsbeispiels mit längsverschieblich angeordneter Achse.

Here show:

Fig. 1

a side view with partial sectional view of the motor drive with drive pulley, adjusting cams and link switching plate;

Fig. 2

a plan view of the unit from the drive pulley with adjusting cams and link switching plate;

Fig. 3

a side view of part of the drive housing with thrust washer and cross pin;

Fig. 4

a representation similar to Figure 3, but with a cross pin in the actuating position and axially displaced thrust washer.

Fig. 5

a plan view of a part of the drive housing with recognizable slots for receiving the cross pin;

Fig. 6

a representation of the chamfers in connection with the control cam on the drive pulley; and

Fig. 7

a schematic representation of a further embodiment with a longitudinally displaceable axis.

In the representation of the motor drive for automatic diverter switch 1 is the actual switch in a switch housing 1, but not in this switch housing Shown contacts, switch contacts, switch base and a bearing plate for the switching rotor 2 are provided. The Switching rotor 2 leads with a shaft end 3 to a corner gear 4, which is located in the drive housing 5. On an intermediate support 6, a geared electric motor 7 is flanged. The Motor axis 8 carries a drive pulley 9, which has an actuating cam 10 has.

The adjusting cam 10 has a cylindrical shape with an above rounded or tapered top surface.

In operation, the control cam 10 is in engagement with one Link switch plate 11, which is located on the axis 12 is.

The link switch plate 11 has recesses 13 into which the actuating cam 10 engages when the drive pulley 9 rotates and with the help of the link switch plate 11 moves can be. This movement is transmitted by means of the axis 12 and the corner gear 4 on the switching rotor 2, so that the desired switching movements and switching positions achieved can be.

As can be seen from FIG. 2 in connection with FIG. 6, the sliding switch plate 11 has lateral bevels 14, which a (renewed) sliding of the adjusting cam 10 into the Recesses 13 after incorrect positioning or incorrect switching allow without the switch plate or other mechanical Elements are damaged.

During this sliding of the control cam 10 on the run-up slopes 14 is guided on the switch plate carrier 15 Link switch plate 11 against the force of a coil spring 16 raised.

In the event of an emergency actuation by inserting or putting one on shown rotary handle on the axis 12 or a corresponding Axial extension is a relative movement in the axial Direction, here a thrust washer 17 is taken.

The pressure plate 17 comprises a pressure pin 18 which on the below that end of the link switching plate 11 a Exerts force.

Characterized in that the switch plate carrier 15 has a slope 19, tilts the link switch plate 11 to the rear, when shown Example in the direction of the switch housing 6, whereby the front part of the link switching plate 11 from the area of Setting cam 10 of the drive pulley 9 moved out and then can be freely rotated.

The coil spring 16 already mentioned, which on a Guide pin 20 is located, ensures that after Remove the emergency control device, the thrust washer 17 moved back to the initial state and the link switch plate 11 comes into contact with the drive pulley 9, the cam 10 in the recess 13 of the Link switch plate 11 engages.

The mentioned slope or chamfer 19 of the switch plate carrier is on the side opposite the drive pulley 9.

With regard to the moving movement of the link switching plate 11 by the control cam 10 on the drive pulley 9 be on the Fig. 2 referenced.

As can be seen, the upper region of the axis 12 preferably has a square cross section and it is the switch plate carrier 15 provided with a corresponding inner cross section.

The link switch plate 11 is angularly movable and at least partially axially displaceable, but radially fixed, to transmit the desired forces in the motor drive to be able to.

When operated manually, it is used to adjust the switching rotor 2 required force via the axis 12 or the introduced or attached rotary handle by means of the corner gear 4 provided.

The pressure pin 18 is in corresponding by circlips Bores of both the thrust washer 17 and the link switch plate 11 held. The guide pin 20 is only in the pressure plate 17 fixed and slides with its free end in a hole or recess in the shift control plate 11.

With the dash-dotted representation of FIG. 1 angularly shifted position of the link switching plate 11 Desired manual or emergency operation made clear.

3 to 5 is the principle of ensuring one Shift movement only after complete disengagement from the motor Drive shown.

A cross pin 21 dips through one of the slots 22 in the Housing are arranged in the interior of the housing and takes the Thrust washer 17 in the axial direction.

By the diameter of the cross pin 21 in conjunction with the Thickness of the housing wall ensures that such axial displacement of the thrust washer 17 and thus tilting of the link switch plate 11 is that a safe decoupling is guaranteed before the manual switching process is executable. The one that lies against the inside of the housing Cross pin 21 also prevents unwanted pressing out of the Actuating extension 23 acting as a switching axis.

Then, when the manual switching process is completed, presses Coil spring 16 the link switch plate 11 back on the Drive disc 9 back and at the same time the actuation extension 23 upwards or outwards.

6, the actuating cam 10 on the run-up bevels 14 slide along and the link plate 11 against the Raise the action of the coil spring 16 and into the recesses 13 occur. This case is relevant when certain Switch positions of the engine due to incorrect switching in the wrong direction of rotation was brought. With the described Solution is effectively prevented that the control cam 10 to the Strikes the outer edge of the link switching plate 11 and this or other parts damaged.

In a further embodiment shown in principle with FIG. 7, the axis 12 is arranged and guided in a longitudinally displaceable manner.
The axis is at least partially surrounded by the link switch plate 11 mentioned, the link switch plate 11 being supported by a spring to a fixed point 24, which can be part of the housing.

When shifting axially in the direction of the arrow, the link switch plate 11 is lifted from the drive pulley 9 and is freely rotatable to the desired manual driving forces to transfer the switching rotor.

There is the possibility of both the link switching plate 11 against the fixed point 24 by means of a spring as well as the lower one Support the end of the axis with a spring to hold the to ensure axial mobility and on the other hand Re-engage or couple the recesses 13 in the link switch plate 11 with respect to the actuating cam 10.

It is essential for the described exemplary embodiments that in case of emergency operation by inserting or putting on a rotary handle on the axis to adjust the switching rotor Relative movement in the axial direction can be carried out, with this relative movement ensures that the im Engine operation case existing engagement between link switch plate and control cams on the drive pulley come loose and on the other hand after removing the rotary handle after finishing the Emergency actuation is restored using spring force.

Depending on the position of the control cam with respect to the actuation side At the end of the axis there is either a tilting movement of the link switching plate or a longitudinal displacement of the sheet or in In the case of a sheet firmly connected to the axis, a longitudinal displacement the axis itself.

LIST OF REFERENCE NUMBERS

1

switch housing

2

switch rotor

3

shaft end

4

Eckgetriebe

5

drive housing

6

subcarrier

7

electric motor

8th

motor axis

9

sheave

10

adjusting cams

11

Shifting gate plate

12

axis

13

recess

14

chamfers

15

Contact plate carrier

16

coil spring

17

thrust washer

18

pushpin

19

Sloping of the switch plate carrier

20

guide pin

21

cross pin

22

slots

23

Actuating extension

24

benchmark

Claims (10)

1. A motor drive for automatic load change-over switches and additional manual emergency actuation function, said drive having a disk with a circumferential actuating cam, and said actuating cam engaging in a shifting gate plate, which, via an axis, is in active mechanical connection with the rotor of the switch,
   characterized in that
   during emergency actuation, a relative movement may be carried out in the axial direction for readjustment of the switching rotor, by inserting or slipping on a turning handle having an actuating prolongation into/onto said axis, with the engagement between the shifting gate plate and the actuating cam releasing by said relative movement and restoring in a spring force-supported manner after removal of the turning handle.
2. The motor drive according to claim 1,
   characterized in that
   above the shifting gate plate, radially surrounding said axis, an axially displaceable pressure disk is arranged comprising a pressure pin and a guidance pin; a gate plate support is attached on said axis, with said gate plate support having a chamfer or bevel on the side opposite the drive disk, and that with an axial displacement of the pressure disk, said pressure pin presses said shifting gate plate against said chamfer or bevel, and tilts same by a predetermined angle, so that the actuating cam exits from the shifting member.
3. The motor drive according to claim 2,
   characterized in that
   a helical spring is arranged surrounding said guidance pin, so as to cause a spring force-supported back movement of the shifting gate plate and/or the turning handle, with the guidance pin movably sliding in a bore of the gate plate.
4. The motor drive according to any one of the preceding claims,
   characterized in that
   in the operational state, said shifting gate plate runs essentially parallel to the drive disk, and has lateral antilock stopping slopes.
5. The motor drive according to any one of the preceding claims,
   characterized in that
   the actuating prolongation of the turning handle has a preferably rectangular or square cross-section adapted to the axis, with a transverse pin being situated on the free end of the prolongation, which transverse pin, during manual operation, supports against an inner wall of a housing.
6. The motor drive according to claim 5,
   characterized in that
   in the zone of an opening of the housing, at least one slot adapted to the transverse pin shape is provided for receiving the axis or the actuating prolongation.
7. The motor drive according to claim 6,
   characterized in that
   said slot has a depth or a distance from the housing surface in such a manner that the actuating prolongation causes a sufficient axial movement of the pressure disk and the pressure pin for decoupling the shifting gate plate and actuating cam, so as to subsequently release the manual turning movement and to maintain the final decoupling position through to the exit movement of the actuating prolongation.
8. The motor drive according to claim 1,
   characterized in that
   the axis is arranged and guided longitudinally displaceable, with the shifting gate plate being arranged surrounding the axis at least in part and being connected with same, with the axis and/or the shifting gate plate moreover supporting towards a fixed point via a spring, so that during the axial displacement of the axis with the shifting gate plate, the engagement with the actuating cam releases.
9. The motor drive according claim 8,
   characterized in that
   lateral bevels are formed on the shifting gate plate as stopping slopes.
10. The motor drive according to any one of the preceding claims,
    characterized in that
    the shifting gate plate has stopping faces for terminal position switches preferably on the end opposite the shifting gate.

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