Mechanism for driving an electrical switching device / switch disconnector

Abstract

The present disclosure relates to a contact driving system for an electrical device. The contact driving system includes a housing, a first rotor inside the housing. A second rotor inside the housing, and operatively configured, through a gear arrangement, with the first rotor and contacts of the electrical device such that a first rotating motion of the first rotor in a first direction facilitates a second rotating motion of the second rotor in a second direction. The second rotating motion facilitates, through a driving mechanism, driving of the contacts of the electrical device. The driving mechanism comprises one or more springs being configured between distal ends of the second rotor and the housing. The one or more springs are configured to drive, after getting charged by the second rotating motion, the contacts of electrical device with a pre-defined force irrespective of the first rotating motion and the second rotating motion.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of low voltage switchgear. More particularly, the present invention relates to complete manualindependent mechanism for driving an electrical switching device / switchdisconnector.BACKGROUND

[0002] Background description includes information that may be useful inunderstanding the present invention. It is not an admission that any of theinformation provided herein is prior art or relevant to the presently claimedinvention, or that any publication specifically or implicitly referenced is prior art.

[0003] Electrical switching apparatus, such as switch disconnector,provides isolation and is capable of making, carrying and breaking currents undernormal circuit conditions (which may include specified operating overloadconditions for specific time) and also under specified abnormal circuit conditionssuch as those short circuit for a specified time. These are suitable for diverseapplications, in motor control centers, in switchboards and as main switches invarious equipment and machines. These switches are ideal for withstanding highershort circuit currents for short time duration.

[0004] In current system there is some degrees of overlap between therotation of handle and contact system rotation, this gives rise to manualdependency. So, the mechanism rotation post dead center can be manuallyinfluenced by the user by applying external force during abusive operation whichwill affect contact system velocity. But by using this particular embodiment, theuser while operating will have no influence on contact opening / closing velocityand will not be able to stop or cause any hindrance to contact system motion thusadding to reliability of switch.

[0005] There is, therefore, a need of an improved contact driving systemfor electrical devices, which are free from above discussed problems.OBJECTS OF THE PRESENT DISCLOSURE

[0006] Some of the objects of the present disclosure, which at least oneembodiment herein satisfies are as listed herein below.

[0007] It is an object of the present disclosure to provide a contact drivingsystem for an electrical device, which is independent of the driving force & speedof the user.

[0008] It is an object of the present disclosure to provide a contact drivingsystem for an electrical device, which make sure that the contact closing andopening is smooth without getting altered by external means.

[0009] It is an object of the present disclosure to provide a contact drivingsystem for an electrical device, which is simple and easy to use.

[0010] It is an object of the present disclosure to provide a contact drivingsystem for an electrical device, which is cost effective.

[0011] It is an object of the present disclosure to provide a contact drivingsystem for an electrical device, which requires less maintenance.SUMMARY

[0012] The present disclosure relates to the field of low voltage switchgear. More particularly, the present invention relates to complete manualindependent mechanism for driving an electrical switching device / switchdisconnector.

[0013] An aspect of the present disclosure pertains to a contact drivingsystem for an electrical device. The contact driving system includes a housing, afirst rotor inside the housing. A second rotor inside the housing, and operativelyconfigured, through a gear arrangement, with the first rotor and contacts of theelectrical device such that a first rotating motion of the first rotor in a firstdirection facilitates a second rotating motion of the second rotor in a seconddirection. The second rotating motion facilitates, through a driving mechanism,driving of the contacts of the electrical device. The driving mechanism comprisesone or more springs being configured between distal ends of the second rotor andthe housing. The one or more springs are configured to drive, after gettingcharged by the second rotating motion, the contacts of electrical device with a predefined force irrespective of the first rotating motion and the second rotatingmotion.

[0014] In an aspect, the first rotor may be configured to rotate inclockwise direction to drive the contacts in electrical OFF condition and the firstrotor is configured to rotate in anti-clockwise direction to drive the contacts inelectrical ON condition.

[0015] In an aspect, the one or more springs may get charged by rotatingthe first rotor, by a pre-defined angle, in any of the clockwise direction and theanti-clockwise direction.

[0016] In an aspect, the gear arrangement system may include a first gearoperatively configured with the first rotor. One or more second gears operativelyconfigured with the first gear and the second rotor, such that a third motion of thefirst gear in the first direction facilitates a fourth motion of the one or more secondgears in the second direction facilitating the second rotating motion of the secondrotor.

[0017] In an aspect, the one or more second gear may be coupled witheach other through one or more first pins.

[0018] In an aspect, the one or more second gear may be coupled with thecontacts of the electrical contacts through one or more second pins.

[0019] In an aspect, the driving mechanism may comprise a CAMconfigured with the second rotor and two leaf springs.

[0020] In an aspect, the CAM may comprise a hexagonal shape accordingto the angle of rotation of the CAM for enabling three stable positions.

[0021] In an aspect, the leaf springs may provide biasing in electrical ONcondition and the electrical OFF condition and enable stable test position.

[0022] Various objects, features, aspects and advantages of the inventivesubject matter will become more apparent from the following detailed descriptionof preferred embodiments, along with the accompanying drawing figures in whichlike numerals represent like components.BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings are included to provide a furtherunderstanding of the present disclosure, and are incorporated in and constitute apart of this specification. The drawings illustrate exemplary embodiments of thepresent disclosure and, together with the description, serve to explain theprinciples of the present disclosure. The diagrams are for illustration only, whichthus is not a limitation of the present disclosure.

[0024] In the figures, similar components and / or features may have thesame reference label. Further, various components of the same type may bedistinguished by following the reference label with a second label thatdistinguishes among the similar components. If only the first reference label isused in the specification, the description is applicable to any one of the similarcomponents having the same first reference label irrespective of the secondreference label.

[0025] FIG. 1 illustrates exemplary representation of a contact drivingsystem for an electrical device, in accordance with an embodiment of the presentdisclosure.

[0026] FIG. 2A-C illustrates exemplary representation of different viewsof the contact driving system, in accordance with an embodiment of the presentdisclosure.

[0027] FIG. 3A-C illustrates exemplary representation of the contactdriving system under (OFF to ON) operating conditions, in accordance with anembodiment of the present disclosure.

[0028] FIG. 4A-D illustrates exemplary representation of CAM and leafsprings of the contact driving system for OFF to test condition, in accordance withan embodiment of the present disclosure.DETAILED DESCRIPTION

[0029] The following is a detailed description of embodiments of thedisclosure depicted in the accompanying drawings. The embodiments are in suchdetail as to clearly communicate the disclosure. However, the amount of detailoffered is not intended to limit the anticipated variations of embodiments; on thecontrary, the intention is to cover all modifications, equivalents, and alternativesfalling within the scope of the present disclosure as defined by the appendedclaims.

[0030] In the following description, numerous specific details are set forthin order to provide a thorough understanding of embodiments of the presentinvention. It will be apparent to one skilled in the art that embodiments of thepresent invention may be practiced without some of these specific details.

[0031] The present disclosure relates to the field of low voltage switchgear. More particularly, the present invention relates to complete manualindependent mechanism for driving an electrical switching device / switchdisconnector.

[0032] The present disclosure elaborates upon a contact driving system foran electrical device that can be but not limited to switch disconnector andswitching device. The contact driving system includes a housing, a first rotorinside the housing. A second rotor inside the housing, and operatively configured,through a gear arrangement, with the first rotor and contacts of the electricaldevice such that a first rotating motion of the first rotor in a first directionfacilitates a second rotating motion of the second rotor in a second direction. Thesecond rotating motion facilitates, through a driving mechanism, driving of thecontacts of the electrical device. The driving mechanism comprises one or moresprings being configured between distal ends of the second rotor and the housing.The one or more springs are configured to drive, after getting charged by thesecond rotating motion, the contacts of electrical device with a pre-defined forceirrespective of the first rotating motion and the second rotating motion.

[0033] In an embodiment, the first rotor can be configured to rotate inclockwise direction to drive the contacts in electrical OFF condition and the firstrotor is configured to rotate in anti-clockwise direction to drive the contacts inelectrical ON condition.

[0034] In an embodiment, the one or more springs can get charged byrotating the first rotor, by a pre-defined angle, in any of the clockwise directionand the anti-clockwise direction.

[0035] In an embodiment, the gear arrangement system can include a firstgear operatively configured with the first rotor. One or more second gearsoperatively configured with the first gear and the second rotor, such that a thirdmotion of the first gear in the first direction facilitates a fourth motion of the oneor more second gears in the second direction facilitating the second rotatingmotion of the second rotor.

[0036] In an embodiment, the one or more second gear can be coupledwith each other through one or more first pins.

[0037] In an embodiment, the one or more second gear can be coupledwith the contacts of the electrical contacts through one or mor second pins.

[0038] In an embodiment, the driving mechanism can comprise a CAMconfigured with the second rotor and two leaf springs.

[0039] In an embodiment, the CAM can comprise a hexagonal shapeaccording to the angle of rotation of the CAM for enabling three stable positions.

[0040] In an embodiment, the leaf springs can provide biasing in electricalON condition and the electrical OFF condition and enable stable test position.

[0041] FIG. 1 illustrates exemplary representation of a contact drivingsystem for an electrical device, in accordance with an embodiment of the presentdisclosure.

[0042] FIG. 2A-C illustrates exemplary representation of different viewsof the contact driving system, in accordance with an embodiment of the presentdisclosure.

[0043] FIG. 3A-C illustrates exemplary representation of the contactdriving system under (OFF to ON) operating conditions, in accordance with anembodiment of the present disclosure.

[0044] FIG. 4A-D illustrates exemplary representation of CAM and leafsprings of the contact driving system for OFF to test condition, in accordance withan embodiment of the present disclosure.

[0045] As illustrated, a contact driving system 100 for an electrical devicecan includes a housing 102, a first rotor 104 inside the housing. A second rotor106 inside the housing. The first rotor 104 and the second rotor 106 can beconfigured to rotate on their own axis. The first rotor 104 can be configured torotate in clockwise direction to drive the contacts in electrical OFF condition andin anti-clockwise direction to drive the contacts in electrical ON condition. Thesecond rotor 106 can be operatively configured, through a gear arrangement, withthe first rotor 104 and contacts of the electrical device such that a first rotatingmotion of the first rotor 104 in a first direction facilitates a second rotating motionof the second rotor 106 in a second direction. The first direction and the seconddirection can be perpendicular to each other. The first rotor is configured to rotateby 70-90 degrees in both the clockwise and anti-clock wise direction and a similareffect is transferred in the second rotor 106 to drive the contacts in electrical ONand electrical OFF condition. An operation of the system can be a toggling typeoperation. The second rotor 106 can be rotate using a CAM profile (not shown).

[0046] In an embodiment, the second rotating motion can facilitate drivingof the contacts of the electrical device through a driving mechanism. The drivingmechanism can include one or more springs 108 that can be configured, throughone or more arms 122, between distal ends 106-1 of the second rotor 106 and thehousing 102. The one or more springs 108 can be configured to drive, after gettingcharged by the second rotating motion, the contacts of electrical device with a predefined force irrespective of the first rotating motion of the first rotor 104 and thesecond rotating motion of the second rotor 106. The first rotor 104 can beconfigured to rotate by 70-90 degrees in either of the clockwise and anti-clockwise direction and a similar effect is transferred to the second rotor 106 to drivethe contacts in electrical ON and electrical OFF condition. The one or moresprings 108 can get charged by rotating the first rotor 104, by a pre-defined angle(between 70-90 degrees), in any of the clockwise direction and the anti-clockwisedirection. The predefined angle can be corresponding to dead centre or middlepoint of the toggle operation of the contact driving system 100. The one or moresprings 108 can be configured with the second rotor 106 that drives contactsystem of the electrical device. The connection between second rotor and contactsystem can be in such a way that the second rotors will only drive the contactsystem after crossing a toggle point of the first gear 110. After crossing the togglepoint, the second rotor and contact system, both can rotate by spring (108) energyindependent of operator action.

[0047] In an embodiment, the gear arrangement system can include a firstgear 110 that can be operatively configured with the first rotor 104. The first gear110 can be a vertical gear. One or more second gears 112 can be operativelyconfigured with the first gear 110 and the second rotor 106, such that a thirdmotion of the first gear 110 in the first direction (vertical direction) can facilitate afourth motion of the one or more second gears 112 in the second direction(horizontal direction) facilitating the second rotating motion of the second rotor106. The one or more second gears 112 can be coupled with each other throughone or more first pins 114. The one or more second gears 112 can be coupled withthe contacts of the electrical contacts through one or mor second pins 116. Thedriving mechanism can comprise a CAM 118 that can be configured with thesecond rotor 106 and two leaf springs 120. The CAM 118 can include a hexagonalshape according to the angle of rotation of the CAM 118 for enabling three stablepositions. The leaf springs 120 can provide biasing in electrical ON condition andthe electrical OFF condition and enable stable test position.

[0048] Moreover, in interpreting the specification, all terms should beinterpreted in the broadest possible manner consistent with the context. Inparticular, the terms "comprises" and "comprising" should be interpreted asreferring to elements, components, or steps in a non-exclusive manner, indicatingthat the referenced elements, components, or steps may be present, or utilized, orcombined with other elements, components, or steps that are not expresslyreferenced. Where the specification claims refer to at least one of somethingselected from the group consisting of A, B, C ….and N, the text should beinterpreted as requiring only one element from the group, not A plus N, or B plusN, etc.

[0049] While the foregoing describes various embodiments of theinvention, other and further embodiments of the invention may be devised withoutdeparting from the basic scope thereof. The scope of the invention is determinedby the claims that follow. The invention is not limited to the describedembodiments, versions or examples, which are included to enable a person havingordinary skill in the art to make and use the invention when combined withinformation and knowledge available to the person having ordinary skill in the art.ADVANTAGES OF THE INVENTION

[0050] The proposed invention provides a contact driving system for anelectrical device, which is independent of the driving force & speed of the user.

[0051] The proposed invention provides a contact driving system for anelectrical device, which make sure that the contact closing and opening is smoothwithout getting altered by external means.

[0052] The proposed invention provides a contact driving system for anelectrical device, which is simple and easy to use.

[0053] The proposed invention provides a contact driving system for anelectrical device, which is cost effective.

[0054] The proposed invention provides a contact driving system for anelectrical device, which requires less maintenance.

Claims

1. A contact driving system for an electrical device, the contact driving system comprising: a housing; a first rotor inside the housing; a second rotor inside the housing, and operatively configured, through a gear arrangement, with the first rotor and contacts of the electrical device such that a first rotating motion of the first rotor in a first direction facilitates a second rotating motion of the second rotor in a second direction, and the second rotating motion facilitates, through a driving mechanism, driving of the contacts of the electrical device, wherein the driving mechanism comprises one or more springs being configured between distal ends of the second rotor and the housing, and the one or more springs are configured to drive, after getting charged by the second rotating motion, the contacts of electrical device with a pre-defined force irrespective of the first rotating motion and the second rotating motion.

2. The contact driving system as claimed in claim 1, wherein the first rotor is configured to rotate in clockwise direction to drive the contacts in electrical OFF condition and the first rotor is configured to rotate in anticlockwise direction to drive the contacts in electrical ON condition.

3. The contact driving system as claimed in claim 2, wherein the one or more springs get charged by rotating the first rotor, by a pre-defined angle, in any of the clockwise direction and the anti-clockwise direction.

4. The contact driving system as claimed in claim 1, wherein the gear arrangement system comprises: a first gear operatively configured with the first rotor, one or more second gears operatively configured with the first gear and the second rotor, such that a third motion of the first gear in the first direction facilitates a fourth motion of the one or more second gears in the second direction facilitating the second rotating motion of the second rotor.

5. The contact driving system as claimed in claim 1, wherein the one or more second gear are coupled with each other through one or more first pins.

6. The contact driving system as claimed in claim 1, wherein the one or more second gear are coupled with the contacts of the electrical contacts through one or mor second pins.

7. The contact driving system as claimed in claim 1, wherein the driving mechanism comprises a CAM configured with the second rotor and one or more leaf springs.

8. The contact driving system as claimed in claim 7, wherein the CAM comprises a hexagonal shape according to the angle of rotation of the CAM for enabling three stable positions.

9. The contact driving system as claimed in claim 7, wherein the leaf springs provide biasing in electrical ON condition and the electrical OFF condition and enable stable test position.