Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H3/00—Mechanisms for operating contacts
  • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
  • H01H3/227—Interlocked hand- and power-operating mechanisms

Definitions

• the invention relates to a motor drive for automatic diverter switch and additional manual emergency actuation function, the drive having a disk with circumferential actuating cams and the actuating cam engaging in a link switch plate, which is in mechanical connection with the rotor of the switch via an axis, according to the preamble of the patent claim 1.
• Automatic diverter 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, e.g. an emergency generator.
• Automatic diverter switches are e.g. used 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 Kunststofftechnik 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.
• the mechanical transmission of power from the motor to the switch or to the switching elements is complicated, cost-intensive and prone to failure and, on the other hand, high forces have to be applied during manual operation in order to move the motor and the transmission.
• the conceivable removal of the motor drive for manual emergency operation is also technically very complex and does not meet the safety requirements.
• a drive for a disconnector in particular for a catenary switch, is known, the drive containing a drive shaft which can be actuated by a motor or by hand and acts on the switch.
• a worm gear has a hollow shaft which can be driven by the motor and serves for concentric mounting of the drive shaft.
• a clutch which separates the drive shaft and the hollow shaft from one another or connects them in a non-positive manner, which clutch can be disengaged against an actuating force when switching from motor to manual operation while removing the connection mentioned.
• the construction is to be designed in such a way that a safe restart when the engine is started up again can be achieved without the risk of the engine blocking or the motor drive or the individual drive elements being destroyed.
• the basic idea of the invention is to ensure, in a constructively implemented manner, that a relative movement in the axial direction can be carried out in the event of an emergency actuation by inserting or placing a rotary handle on the drive axis, which serves to adjust the switching rotor. This relative movement releases the engagement which existed up to that point between a conventional shift control plate and an actuating cam which is arranged on the drive disk. After such decoupling, the desired switching between the switching positions I-O-II can then be carried out with the help of the rotary handle or the like.
• the latching state between the actuating cam and the link switching plate is restored after the rotary handle has been removed.
• the link switch plate in operative connection with the control cam is designed so that regardless of the manual switching position when the motor drive is reactivated, the motor always engages in the respective subsequent switching direction that is desired and specified.
• an axially displaceable thrust washer which comprises a thrust pin and a guide pin, is arranged above the link switching plate, radially surrounding the already mentioned axis.
• a so-called shift plate carrier is also attached to the axle, the shift plate carrier having a chamfer or bevel on the side opposite the drive disk.
• the pressure pin moves in the direction of the shift control plate and presses the latter against the chamfer or slope, so that a predeterminable tilt angle is set, with the result that the setting lifts off the actuating cam or the latter emerges from the setting.
• a helical spring is arranged around the guide pin, which causes a spring-assisted return movement of the link switching plate and / or the twist grip, the guide pin slidingly sliding in a hole in the switching plate and e.g. is fixed by locking rings or similar fasteners.
• the link switch plate In the operating state, the link switch plate is essentially parallel to the drive pulley and has lateral, anti-blocking bevels.
• run-on bevels prevent the actuating 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 chamfers allow it in
• the actuation extension of the rotary handle has a cross-section that is adapted to the axis, preferably rectangular or square, with a transverse pin at the free end of the extension is located, which is supported against the inner wall of the drive of the desired manual operation.
• the cross pin mentioned has a multifunctional effect.
• the housing cover can have slots adapted to the switching positions.
• the cross pin dips into the interior of the housing through a slot assigned to the respective switching position and simultaneously actuates the pressure plate, i.e. shifts the latter down.
• the pressure pin also moves in the direction of the shift control plate and, due to the effect of the chamfer or bevel, brings it into an angular position with the aim of decoupling the control cam and the shift control plate.
• the transverse pin now resting on the inside of the housing cover or the housing opening furthermore prevents the switching axis from being pressed out unintentionally during the rotation between the individual switching positions and, on the other hand, only releases the rotary movement when the link switching plate has been lifted sufficiently out of the engagement of the actuating cam.
• the helical spring fixed to the guide pin presses the link switching plate back onto the drive pulley and additionally the actuation extension or the switching axis to the outside.
• the construction with regard to the slot or slots is selected such that they have a depth or a distance from the housing surface in such a way that the actuating extension causes sufficient axial movement of the thrust washer and the pressure pin to decouple the switching plate and actuating cams then release the desired manual rotary movement for the emergency actuation.
• the axis is guided so as to be longitudinally displaceable without leaving the basic principle of the invention, the axis being at least partially surrounding and connected to this, the link switch plate is arranged.
• the axis and / or the link switch plate is supported by a spring at a fixed point, so that when the axis with the link switch plate is moved axially, the engagement with the actuating cam is released. Due to the spring force, when the longitudinal displacement force is released, the engagement state is restored, so that motor operation of the diverter switch can be restarted.
• the link switch plate has lateral bevels as run-on bevels for the actuating cam, which is located on the drive disk.
• the link switching plate preferably has stop surfaces for limit switches at the end opposite the switching link.
• the stop surfaces can also be formed by plastic parts with a corresponding shape, which in turn are themselves rotatable.
• Figure 1 is a side view with partial sectional view of the motor drive with drive pulley, adjusting cams and link switching plate.
• Figure 2 is a plan view of the unit from the drive pulley with adjusting cams and link switching plate.
• Figure 3 is a side view of part of the drive housing with thrust washer and cross pin.
• FIG. 4 shows an illustration similar to FIG. 3, but with a transverse pin in the actuating position and an axially displaced pressure disk;
• Figure 5 is a plan view of part of the drive housing with recognizable slots for receiving the cross pin.
• FIG. 7 shows a basic illustration of a further exemplary embodiment with an axially displaceable axis.
• the actual switch is in a switch housing 1, connection contacts (not shown), switch contacts, switch base and a bearing plate for the switching rotor 2 being provided in this switch housing.
• the switching rotor 2 leads with a shaft end 3 to a corner gear 4, which is located in the drive housing 5.
• a geared electric motor 7 is flanged onto an intermediate carrier 6.
• the motor axis 8 carries a drive pulley 9, which has an actuating cam 10.
• the adjusting cam 10 has a cylindrical shape with a rounded or conical top surface.
• the actuating cam 10 is in engagement with a link switching plate 11, which is located on the axis 12.
• the gate switch plate 11 has recesses 13 into which the actuating cam 10 engages when the drive disk 9 rotates and with the aid of which the gate switch plate 11 can be moved. This movement is transmitted by means of the axis 12 and the corner gear 4 to the switching rotor 2, so that the desired switching movements and switching positions can be achieved.
• the link switching plate 11 has lateral run-on bevels 14, which allow the control cam 10 to slide (again) into the recesses 13 after incorrect positioning or switching errors, without the switching plate or other mechanical elements to be damaged.
• the pressure plate 17 comprises a pressure pin 18, which exerts a force on the end of the link switching plate 11 located below.
• the switch plate carrier 15 has a slope 19
• the link switch plate 11 tilts backwards, in the example shown in the direction of the switch housing 6, whereby the front part of the link switch plate 11 moves out of the area of the actuating cam 10 of the drive pulley 9 and is then freely rotated can.
• the helical spring 16 already mentioned, which is located on a guide pin 20, ensures that after removing the emergency actuating device, the thrust washer 17 moves back into the initial state and the gate switching plate 11 comes into contact with the drive pulley 9, the actuating cam here 10 engages again in the recess 13 of the link switching plate 11.
• the aforementioned bevel or chamfer 19 of the switch plate carrier is formed on the side opposite the drive disk 9.
• the upper region of the axis 12 preferably has a square cross section and the switching plate carrier 15 is provided with a corresponding inner cross section.
• the link switching plate 11 is angularly movable and at least partially axially displaceable, but is fixed radially in order to be able to transmit the desired forces in the motor drive.
• the force required to adjust the switching rotor 2 is provided via the axis 12 or the inserted or attached rotary handle by means of the corner gear 4.
• the pressure pin 18 is held in corresponding bores in both the pressure plate 17 and the link plate 11 by means of retaining rings.
• the guide pin 20 is only fixed in the thrust washer 17 and slides with its free end in a bore or recess in the link switching plate 11. With the dash-dotted representation according to FIG. 1, the angularly shifted position of the shift control plate 11 is clearly made when manual or emergency actuation is desired.
• 3 to 5 is the principle of ensuring one
• a cross pin 21 dips through one of the slots 22, which are arranged in the housing, into the interior of the housing and takes the thrust washer 17 along in the axial direction.
• the diameter of the cross pin 21 in connection with the thickness of the housing wall ensures that such an axial displacement of the thrust washer 17 and thus a tilting of the link switching plate 11 takes place so that a safe decoupling is ensured before the manual switching process can be carried out.
• the transverse pin 21 resting on the inside of the housing also prevents the actuating extension 23, which acts as a switching axis, from being pressed out unintentionally.
• the actuating cam 10 can slide along the run-up bevels 14 and raise the link switching plate 11 against the action of the helical spring 16 and enter the recesses 13. This case is relevant if the motor has been switched in the wrong direction of rotation due to incorrect switching at certain switching positions. With the solution described it is effectively prevented that the actuating cam 10 strikes the outer edge of the link switching plate 11 and damages this or other parts.
• the axis 12 is arranged and guided in a longitudinally displaceable manner.
• the axis is at least partially surrounded by the aforementioned shift control plate 11, the shift control plate 11 being supported via a spring to a fixed point 24, which can be part of the housing.
• the link switching plate 11 When shifting axially in the direction of the arrow, the link switching plate 11 is lifted off the drive pulley 9 and can be rotated unhindered in order to transmit the desired manual drive forces to the switching rotor.
• a relative movement in the axial direction can be carried out in the event of an emergency actuation by inserting or placing a rotary handle on the axis for adjusting the switching rotor, this relative movement ensuring that the

Landscapes

• Transmission Devices (AREA)
• Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
• Control Of Electric Motors In General (AREA)
• Control Of Direct Current Motors (AREA)
• Transmissions By Endless Flexible Members (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=7903913

Family Applications (1)

Country Status (5)

Families Citing this family (1)

Family Cites Families (1)

• 1999
  • 1999-04-08 DE DE19915884A patent/DE19915884C1/de not_active Expired - Fee Related
• 2000
  • 2000-02-22 EP EP00916857A patent/EP1169721B1/fr not_active Expired - Lifetime
  • 2000-02-22 WO PCT/EP2000/001441 patent/WO2000062316A1/fr active IP Right Grant
  • 2000-02-22 DE DE50005260T patent/DE50005260D1/de not_active Expired - Fee Related
  • 2000-02-22 AU AU38057/00A patent/AU3805700A/en not_active Abandoned
  • 2000-02-22 AT AT00916857T patent/ATE259538T1/de not_active IP Right Cessation

Non-Patent Citations (1)

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