EP2283501B1 - Control for a high-voltage/medium-voltage electrical device having a short actuation time - Google Patents

Control for a high-voltage/medium-voltage electrical device having a short actuation time Download PDF

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Publication number
EP2283501B1
EP2283501B1 EP09753952A EP09753952A EP2283501B1 EP 2283501 B1 EP2283501 B1 EP 2283501B1 EP 09753952 A EP09753952 A EP 09753952A EP 09753952 A EP09753952 A EP 09753952A EP 2283501 B1 EP2283501 B1 EP 2283501B1
Authority
EP
European Patent Office
Prior art keywords
flexible strap
drive device
bores
flexible
cables
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP09753952A
Other languages
German (de)
French (fr)
Other versions
EP2283501A1 (en
Inventor
Lukas Treier
Peter Von Allmen
Markus Keiser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Technology GmbH
Original Assignee
Alstom Grid AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alstom Grid AG filed Critical Alstom Grid AG
Priority to EP11173109.7A priority Critical patent/EP2375429B1/en
Publication of EP2283501A1 publication Critical patent/EP2283501A1/en
Application granted granted Critical
Publication of EP2283501B1 publication Critical patent/EP2283501B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/36—Driving mechanisms, i.e. for transmitting driving force to the contacts using belt, chain, or cord
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • 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
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3005—Charging means
    • H01H3/3026—Charging means in which the closing spring charges the opening spring or vice versa
    • 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
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3052—Linear spring motors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/40—Driving mechanisms, i.e. for transmitting driving force to the contacts using friction, toothed, or screw-and-nut gearing

Definitions

  • the present invention relates to controls and mechanical transmission devices for high and medium voltage electrical equipment, particularly for high and medium voltage switches.
  • the present invention relates in particular to the controls comprising springs for performing opening and closing cycles on the switches.
  • Controls for high and medium voltage electrical equipment of known type include a spring to open a switch of the equipment, called opening spring and a spring to close this switch, called closing spring.
  • the closing spring is loaded and is maintained in this state, when a closing command is given, the load is released causing the closing of the switch via a mechanical link.
  • the control is arranged such that, releasing the load of the closing spring causes the loading of the opening spring which is maintained in a loaded state until an opening command is received.
  • one of the requirements of this type of control is to provide mechanical opening and closing in reduced times, less than one second, for example of the order of 90 ms for closing and 20 ms at 30 ms for opening.
  • the transmission elements are kept under mechanical tension until an opening or closing order is issued.
  • the transmission elements must withstand such a mechanical tension over a prolonged period.
  • the transmission elements are also highly stressed for a very short time, in particular at their fastenings to the spring and the corresponding shaft. Indeed, during the opening command, the entire load of the spring is released instantly, the traction forces resulting from this expansion on the transmission element both at its attachment to the opening spring and at the level of its attachment to the opening shaft are considerable.
  • the fractional effort can reach tens of kilo Newton, typically 30 kN.
  • the transmission elements and their connection to the springs and shafts are therefore designed to withstand such stresses.
  • these controls may be subjected to inclement weather, and the interior of the controls must be designed to withstand temperatures between -50 ° C and + 50 ° C and may experience condensation occasionally.
  • these controls in particular the elements for transmitting closing and opening forces, are chosen so as to ensure safe operation for a very long duration and this under severe conditions being at the level of the constraints applied to the level of external conditions.
  • a metal roller chain or a cable is used as transmission elements, for example in the control described in the document FR 2,778,492 .
  • Chains and cables provide the security required over a long period of time.
  • the chains require lubrication to avoid any malfunction in the transmission of efforts. Moreover, they are sensitive to corrosion, which can also cause a malfunction of the control. In addition, the chains have a high cost.
  • a single cable is used to transmit the command, its diameter must be sufficient to support the load applied to it. This diameter increases the rigidity of the cable, which implies the use of large diameter return pulleys, thereby increasing the space required for such a control.
  • the document EP1178505 describes a device according to the preamble of claim 1.
  • the previously stated goals are achieved by an order for high and medium voltage equipment composting between the opening actuator and the opening shaft a transmission element formed by a flexible strap, and between the closing actuator and the shaft. closing a transmission means formed by a flexible strap.
  • the flexible strap according to the present invention comprises a plurality of flexible longitudinal elements intended to connect the two zones between which the force is to be transmitted, and at least one transverse element extending between the longitudinal elements.
  • This flexible strap can be formed either by a textile fiber strap, or by a plurality of parallel cables embedded at least for part of their length in a flexible matrix.
  • the cables form the longitudinal elements and the matrix forms the transverse element.
  • the warp yarns form the longitudinal elements and the weft yarns form the transverse elements.
  • the mass of the transmission element is reduced, the actuation time can be reduced.
  • it is no longer necessary to provide a lubrication of the transmission element maintenance is facilitated.
  • the cost price is reduced compared to that of a chain.
  • the present invention therefore mainly relates to an order for high and medium voltage switchgear comprising at least one actuator for opening / closing a switch of said switchgear, a mechanism able to move a moving part of said switch and a force transmission element, said transmission element being formed by a flexible strap .
  • Said flexible strap is, for example arranged between the actuator and said mechanism.
  • the flexible strap may comprise connection nozzles to the actuator and the mechanism at these two ends, each connection end having an end for attaching an end of the flexible strap and an end for attachment to a rod extending in the direction of movement of the flexible strap or at an axis orthogonal to this displacement.
  • the flexible strap comprises several cables arranged parallel to each other and embedded at least for part of their length in a flexible matrix.
  • the matrix can then extend continuously over a large part of the length of the cables.
  • the matrix is made of thermoplastic material, for example polyethylene.
  • the cables are advantageously held tight in at least one of the connection end pieces by stamping.
  • the die can also be held tight in at least one of the connection bits.
  • connection ends comprises bores whose axes are oriented in the direction of movement of the flexible strap, each bore receiving a free end of a cable and wherein each cable is held by stamping.
  • At least one of the connection ends may comprise a transverse bore orthogonal to the axes of the bores and parallel to the plane containing the axes of the bores, said transverse bore penetrating radially into the bores of the cables and a pin being introduced into this transverse diameter bore. equal to the diameter of the transverse bore and pinching the ends of the cables between a periphery of their bore and the pin so as to ensure a pre-assembly before their final assembly by stamping.
  • connection ends has a face inclined relative to the plane containing the axes of the bores so that the cable holding force obtained by stamping is greater on the closed ends of the ends.
  • the bore that the side of the open ends of the bores, the face being inclined for example at an angle of 1, 5 ° relative to the plane containing the axes of the bores.
  • the flexible strap is made of woven or braided textile fibers.
  • These textile fibers are for example polyethylene, polyester or aramid.
  • connection pieces may comprise comprises a first and a second axis parallel to each other, and orthogonal to the direction of movement of the flexible strap, the two pins being connected to an element of the connecting piece for connection to the mechanism or the actuator, each end of the flexible strap s wrapping around the axes of the connecting piece, the second axis being disposed between said element of the connecting piece and the first axis, the end portion of the flexible strap being folded, the end of the flexible strap being fixed on the flexible strap so as to form a closed loop, the loop having an inner face and an outer face, the loop surrounding the first axis so that its inner surface is in contact with the first axis and surrounding the second axis of so that its outer surface is in contact with the second axis, the loop portion surrounding the second axis being formed of a superposition of two thicknesses of flexible strap, the extrusion emitted from the loop formed by the free end of the flexible strap coming out of
  • the at least one actuator may comprise a spring and the mechanism comprises a lever fixed in rotation on a shaft intended to be connected to the movable part of the switch.
  • the control may also include connection means between the flexible strap and the spring ensuring a transmission of forces between the flexible strap and the spring along the axis of the spring.
  • the connecting means between the flexible strap and the spring may comprise a frustoconical piece mounted in the spring, resting on an end turn of the spring by a base, said frustoconical piece being connected to the connection end by a threaded rod. screwed into the connecting piece, said threaded rod being secured to the frustoconical piece by a first nut.
  • the control may advantageously comprise a locknut formed by a tube and a second nut, the tube being clamped between the first and the second nut.
  • the length of the tube is advantageously at least equal to five times the diameter of the threaded rod.
  • the control according to the invention may also comprise connection means between the flexible strap and the lever providing a pivotal connection about an axis parallel to that of the shaft.
  • the lever may comprise an axis projecting parallel to the axis of the shaft and the connection piece has a bore orthogonal to the direction of movement of the flexible strap, said bore receiving the axis, the connection tip may turn around the axis.
  • connection tip may advantageously comprise two parts articulated with respect to each other by means of a connecting rod, the hinge pins being orthogonal to the surface of the flexible strap.
  • the actuator is for example an actuator opening the switch, the lever being an opening lever and the shaft being a main shaft and comprises a second actuator forming an actuator for closing the switch.
  • the closing actuator may comprise a spring connected to a closing lever by a flexible strap, the closing lever being fixed on a closing shaft parallel to the main shaft on which the opening lever is fixed, the lever of closing being integral in rotation with a cam adapted to act on the opening lever, to cause the closing of the switch.
  • the drive may also include a gear for driving the lever in rotation, the gear meshing with a gear train driven by an electric motor to energize the spring.
  • the present invention also relates to a high and medium voltage electrical equipment comprising a control according to the present invention.
  • the method according to the invention may comprise a step of pre-assembly of the cords in the bores before their final assembly.
  • the method according to the present invention may also comprise a step of applying sealing means at the connection between the flexible strap and the connecting tips, for example by applying a paste of the polyurethane type.
  • FIG. 1 and 2 an exemplary embodiment of a control according to the present invention can be seen comprising springs as opening and closing actuators. It is understood that a control using different actuators and different mechanical connections is not beyond the scope of the present invention.
  • control comprises an opening mechanism MO of a switch, for example a circuit breaker (no shown) and a closing mechanism MF of the switch, arranged next to each other in a housing 2.
  • opening mechanism MO of a switch for example a circuit breaker (no shown)
  • closing mechanism MF of the switch arranged next to each other in a housing 2.
  • the opening mechanism MO comprises an elastic means 6 intended to store mechanical energy by deformation and to release it following an opening command, a transmission element 8 of the forces applied by the elastic means 6 and a lever 10 integral with rotation of the main shaft 7.
  • This elastic means 6 is formed in the example shown by a helical spring biased in tension.
  • the transmission element 8 is connected by one end (not visible) to one end of the spring 6 and by another end 8.2 to the lever 10, so that a force exerted on the lever by the spring via the transmission element causes rotation of the main shaft in a given first direction of rotation as soon as the first locking system (not visible) releases the lever 10, causing the opening of the switch.
  • the closing mechanism MF comprises an elastic means 12 intended to store mechanical energy by deformation and to release it following a closing command, opening locking means 11, a transmission element 14 of the forces applied by the means elastic 12, a cam 18 integral in rotation with a shaft 19, called a closing shaft, parallel to the main shaft, said cam 18 cooperating with the lever 10.
  • This resilient means 12 is formed in the example shown by a helical spring biased in tension.
  • the transmission element 14 is connected by one end 14.1 to one end of the spring 12 and by another end 14.2 to a disc 20 also integral in rotation with the closing shaft, so that a force exerted by the spring on the disc 20 causes the rotation of the cam as soon as the closing locking means 11 release the disc 20. This causes, by cooperation with the lever 10, the rotation of the main shaft 7 in a second direction of rotation opposite the first meaning, causing the switch to close.
  • the disc 20 has a toothed contour intended to cooperate with a gear train 21 driven by an electric motor (not shown) and making it possible to load the closing spring 12.
  • the transmission elements 8, 14 are formed by a strap or flexible belt, having a substantially flat shape, i.e. a section whose thickness is reduced relative to its width.
  • the flexible strap in the present invention comprises a plurality of flexible longitudinal elements intended to connect the two zones between which the force is to be transmitted, and at least one flexible transverse element extending between the longitudinal elements.
  • These flexible straps can be formed, in one embodiment, by weaving or braiding textile fibers, for example polyethylene or aramid fibers, for example Kevlar®.
  • the woven flexible strap is obtained, in known manner, by interlacing two son so that this interlacing is at right angles.
  • the warp threads are arranged in the direction of the longitudinal direction and the weft threads are arranged in the transverse direction.
  • these flexible straps may be formed by a plurality of metal cables, for example made of steel, arranged in parallel and embedded at least for part of their length in a flexible material, of thermoplastic type, for example polyurethane .
  • the cables form longitudinal elements and the matrix forms the transverse element.
  • An example of such a flexible strap is shown on the figure 6 , on which we can see the cables 22 arranged parallel to each other and the matrix 24 of flexible material.
  • the matrix 24 makes it possible to secure the cables together, to facilitate the handling of this flexible strap and to reduce the surface pressure stresses on the cables.
  • the die 24 covers the entire length of the cables to protect them from corrosion.
  • return pulleys are provided to guide the soft straps.
  • the matrix 24 is provided only around the zones of the cables which are not intended to slip on the pulleys, this lack of matrix further increases the flexibility of the flexible strap in its curvature areas.
  • the shape of the return pulleys can be adapted to this variant embodiment.
  • the first end 14.1 of the flexible strap 14 is attached to one end of the spring 12 by a connecting means 26.
  • connection means 26 ensures alignment between the axis of the spring and the portion of the flexible strap attached thereto so as to ensure transmission of the force between the spring and the flexible strap along the axis of the spring.
  • connection means comprises a frustoconical piece 28 disposed inside the spring, provided at a first longitudinal end with a base 30 bearing on a turn 32 forming the end of the spring.
  • this base 30 is stepped and has a cylindrical portion 33 of smaller diameter to allow the mounting of a second spring of reduced diameter arranged coaxially in the first spring
  • the frustoconical piece has at a second longitudinal end a passage 35.
  • connection means 26 also comprises a rod 34 intended to connect the first end 14.1 of the flexible strap 14 to the frustoconical piece 28, the rod 34 passing through the passage 35.
  • the rod 34 is threaded and is screwed by an end 34.1 into a connecting piece 36 provided with a tapped bore 38 integral with the first end 14.1 of the flexible strap 14.
  • a first nut 40 is screwed onto the threaded rod 34 inside the frustoconical piece 28 and abuts against the bottom of the truncated cone.
  • a washer 42 is provided between the bottom of the truncated cone and the first nut 40.
  • a counter-nut 44 is provided to prevent the unwanted unscrewing of the nut 40.
  • the counter-nut comprises a tube 46 and a second nut 48, surrounding the rod 34 and mounted in compression between the first 40 and the second nut 48.
  • the tube 46 has a length equal to at least 5 times the diameter of the screw 34. This length prevents the loosening of this assembly.
  • the minimum length of the rod 34 is chosen so that, on the one hand, the spring can be assembled and energized (mechanical) from its rest position, and on the other hand, the mounting of the tube 46 and against the nut 48 after the adjustment of the pretension of the spring is ensured.
  • connection tip 36 has an orifice 49 opening into the bore 38 to allow the passage of a tool for locally deforming the rod and thus easily prevent the unscrewing of the rod 34. Any other means preventing the disconnection of the rod 34 and the connection tip is conceivable.
  • the second end 14.2 of the flexible strap 14 is fixed on a pivoting part, in the particular example of the closing mechanism MF on the disc 20.
  • the connection between the flexible strap 14 and the disc is therefore provided so that the strap flexible accommodates this rotation without being solicited.
  • the end 14.2 comprises a connection endpiece 50 provided with a bore 52 orthogonal to the direction of movement of the flexible strap and parallel to the axis of rotation of the disc 20, and intended to receive a lug 54 fixed on the disc and parallel to its axis.
  • the connecting piece 5C is mounted freely to pivot around the lug 54 forming an axis of rotation.
  • the connecting end 50 and the lug 54 are held on the disc by means of a bolt 56, as can be seen on the figure 2 .
  • a degree of freedom is added in the connecting piece 50 ', it is no longer made in one piece but includes a first portion 58 fixed on the flexible strap, a second portion 60 intended to be rotatably mounted on the lug 54, and a connecting rod 62 connecting the first 58 and the second part 60, the axis 63 of rotation of the rod on the second portion 60 being orthogonal to the axis of the bore 52 intended to receive the lug 54.
  • This additional degree of freedom provides additional flexibility to balance the load across the entire width of the flexible webbing, particularly in the case of a flexible webbing formed of several parallel cables, to distribute the load in a balanced manner over all cables. This therefore increases the load applicable to the flexible strap.
  • the connecting tips 36, 50 are advantageously made of steel so as to withstand the shocks applied to them.
  • the cables of the flexible strap are tightened in the connecting pieces 36, 50 so as to secure the flexible strap securely with the connection piece.
  • connection tip 36 has at its end opposite to that provided with the bore 38, a plurality of blind bores 64, each receiving one end of a cable and in which they are kept tight.
  • the axes of the bores 64 are contained in a plane also containing the axis of the bore 38.
  • the bores 64 are parallel and each bore forms a housing for one end of a cable.
  • the bores are arranged relative to one another in a corresponding manner the relative distance of the cables in the flexible strap.
  • connection tip 36 without the cables.
  • the inlet of the bores is chamfered to facilitate insertion of the cables into the bores.
  • the ends of the cables are retained in the bores by deformation thereof by stamping, which causes a pinching of the cables.
  • the diameter of the bores 64 is provided slightly higher than that of the cables.
  • this deformation is discrete and is performed along the bores. Provision is made to exert a force on a face 69 of the connector end parallel to the plane containing the axes of the bores and along the axes of the bores, and not over the entire surface of the connection tip.
  • the material of the connecting piece which is for example steel, deforms around the ends of the cables and at least partially fills the voids between the son constituting the cables and the inner surface of the bore.
  • the deformation tool DF does not have a surface plane but a surface provided with projections 65 parallel to each other and extending each parallel to an axis of a bore 64.
  • this is obtained for example by producing the face 69 on which the inclined deformation force will be applied with respect to the plane of application of the deformation force, for example at an angle ⁇ of 1.5 °, or by tilting the tool performing the deformation.
  • connection tip The footprint made in the connection tip is, for example of the order of 0.5 times the diameter of the cables.
  • the assembly is provided means for holding the ends of the cables in the bores 64 even before the pinch, to prevent one of them from escaping or moving during deformation of the connection tip.
  • the pin 72 improves the tensile strength of the connection between the cables 22 and the connection tip 36.
  • the glue is preferentially applied in a partial manner, for example in the bottom 64a of the bores 64.
  • the resistance at the level of the nipping zone is at least equal to the resistance of the flexible strap itself.
  • the end of the flexible strap is wrapped around two axes of the connection tip.
  • the connecting end 36 ' comprises a stirrup 74 comprising two parallel flanges 76 connected by a bottom 78 provided with a bore 38' in which is screwed a threaded rod 34 for attachment to an element of the control.
  • the connecting end 36 ' has a first 80 and a second 82 parallel axis formed by pins fixed by each end in a flange 76, the second axis 82 being disposed between the bottom 78 and the axis 80.
  • This loop receives the first axis, the two flexible webbing strips are then superimposed and wrap around the second axis, then out of the connecting end along the first axis.
  • the loop is formed either after the winding of the flexible strap around the axes, or before, it is then the first axis which is removable and put in place in the loop.
  • the tensile force exerted on the connecting piece 36 'in a direction opposite to the force exerted by the flexible strap on the connecting piece 36' is applied in the same plane as that receiving the end of the loop coming out of the connecting piece 36 '.
  • the flanges 76 have holes for mounting the longitudinal ends of the pins, the pins having a shoulder 88 at a first end and tapped bore 89 at a second end to allow the establishment of a bolt 91, ensuring the transverse retention of the pins.
  • the bolt has a hexagonal head.
  • connecting piece 36 which is an alternative embodiment of the connecting piece 36 'This connecting piece 36" differs from the connection piece 36', essentially by the means of fastening the flexible strap .
  • connection endpiece 36 “comprises a first plate 100 intended for fixing the flexible strap to the connection piece and a second plate 102 substantially orthogonal to the first plate 100 intended to allow the connection of the tip 36 "to an element of the command.
  • the second plate 102 has a bore (not visible) in which is screwed a threaded rod 34 integral with a control element.
  • the first plate 100 is oriented relative to the second plate 102 so as to contain the axis of the threaded rod 34.
  • the tip is made in one piece by stamping a sheet, a stamped portion 104 connects the first 100 and the second plate, this pressed portion 104 has a biased portion to shift the second plate 102 relative to the first plate and disposed the axis of the threaded rod 34 in the plane of the first plate 104 as can be seen on the Figure 9E on which the connecting end 36 "is partially shown in longitudinal section.
  • the first plate 100 comprises means for attaching the flexible strap to the tip by winding the flexible strap similarly to the attachment on the tip 36 '.
  • the first plate 100 comprises three slots 108, 110, 112 oblong, each having an axis orthogonal to the axis of the flexible strap, these three lights being separated by bars 114, 116 forming pins winding of the flexible strap 14.
  • the lights are for example cut by means of a punch.
  • the winding is identical to that of the Figure 9A , the bar 114 having the function of the axis 80 and the bar 116 having the function of the axis 82.
  • the flexible strap after its winding around the bars 114 and 116, enters again in the light 108 and runs along a lower face of the first plate 100.
  • connection tip 36 '' is very simple to implement, since it only requires a drawing and stamping step.
  • the flexible straps are guided by return pulleys 68 ensuring the change of direction of the flexible straps.
  • the minimum radius of a pulley is calculated according to the diameter of the flexible strap that it guides.
  • the diameter of a cable being reduced compared to the use of a single large cable pulleys of smaller diameter can be used.
  • the size of the order can be reduced.
  • the surface 94 of the pulleys in contact with the flexible strap may be of different types. It can be smooth, formed by a cylinder of circular section and bordered by two lateral guides 96 ( Figure 7A ).
  • the surface 94 ' can be curved substantially at its center, allowing better guidance of the flexible strap ( Figure 7B ).
  • the surface 94 "has annular grooves 98 coaxial with the axis of the pulley, each intended to receive a portion of cable provided at the bare portions of the flexible strap.
  • connection of the flexible strap 8 to the lever 10 is effected in the same way as the connection of the flexible strap 14 to the disk 20, ie by means of a connecting piece 77 mounted in rotation about an axis parallel to the main axis. In the particular example, this axis is mounted between two flanges 81 of the lever 10.
  • connection of the flexible strap 8 to the spring 6 is similar to that of the flexible strap 14 to the spring 12, i.e. by means of a frustoconical piece and a threaded rod.
  • the motor rotates the toothed disk 20 via the gear train 21, the pin 54 is consequently rotated about the closing shaft 19.
  • the second end 14.2 of the flexible strap 14 is driven so that the first end 14.1 of the flexible strap moves, compressing the spring 12.
  • a first locking device 11 is provided to block the rotation of the disc 20 when the energy level stored in the spring 12 is sufficient, which corresponds to a rotation of the disc a few degrees after the top dead center has been exceeded.
  • the first locking device 11 releases the disk 20, which, under the force exerted by the spring 12 via the flexible strap 14, is rotated, driving the shaft 19, and the cam 18.
  • the cam 13 then comes into contact with the lever 10, which pivots, driving the main shaft 7 in rotation in a second direction of rotation, which causes the displacement of the movable member the switch and the closing of the switch.
  • a second locking device locks the lever 10 when the closed position of the contact is reached.
  • the motor is activated to reload the closing spring 12 as previously described.
  • the second locking device releases the lever 1C, which, under the force exerted by the spring 6 via the flexible strap 8, is rotated, driving the shaft main 7 in the first direction of rotation causing the opening of the switch.
  • the high and medium voltage control according to the present invention using flexible straps as transmission elements provides safe operation over a sufficient period of time.
  • control of the present invention has the advantage of operating without requiring lubrication, the associated maintenance is removed and the risk of wear caused by poor lubrication is also removed.
  • the transmission elements are not susceptible to corrosion.
  • the transmission elements have a reduced mass compared to the generally used chains, so the amount of energy required for the opening and closing operations is reduced. Furthermore, the moving masses being reduced, the open-close time can be reduced from about 3 ms to 4 ms.
  • the flexible straps have a smaller footprint compared to the chains, which reduces the size of the order.
  • the description has been made taking as an example the use of flexible flexible strap for the transmission of force between an actuator and the levers of a control mechanism.
  • the flexible straps as described above can be used anywhere in the chain of transmission of forces between an actuator, for example a spring and the moving contact of a switchgear with high or medium voltage, in which tension is applied to the flexible straps.
  • the soft straps described above can be used to transmit forces between a control mechanism and a circuit breaker with an opening spring disposed at the circuit breaker.

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  • Transmission Devices (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Power-Operated Mechanisms For Wings (AREA)
  • Clamps And Clips (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)

Abstract

The control has opening and closing mechanisms (MO, MF) constituted of elastic units (6, 12) i.e. actuators, for actuating a medium or high voltage electrical apparatus, and transmission elements (8, 14) constituted of flexible belts provided with flexible metallic cables locked in a connection end fitting (50) and another end fitting, respectively. The belts are made of woven or braid fabric fibers. A displacing mechanism displaces a movable part of the apparatus. The flexible belts are arranged between the actuators and the mechanism. A flexible matrix board is locked in the end fittings.

Description

DOMAINE TECHNIQUE ET ART ANTÉRIEURTECHNICAL FIELD AND PRIOR ART

La présente invention se rapporte aux commandes et aux dispositifs de transmissions mécaniques pour appareillages électriques haute et moyenne tension, notamment pour des interrupteurs haute et moyenne tension. La présente invention se rapporte notamment aux commandes comportant des ressorts permettant d'effectuer des cycles d'ouverture et de fermeture sur les interrupteurs.The present invention relates to controls and mechanical transmission devices for high and medium voltage electrical equipment, particularly for high and medium voltage switches. The present invention relates in particular to the controls comprising springs for performing opening and closing cycles on the switches.

Les commandes pour appareillage électrique haute et moyenne tension de type connu comportent un ressort pour ouvrir un interrupteur de l'appareillage, appelé ressort d'ouverture et un ressort pour fermer cet interrupteur, appelé ressort de fermeture. Le ressort de fermeture est chargé et est maintenu dans cet état, lorsqu'un ordre de fermeture est donné, la charge est libérée provoquant la fermeture de l'interrupteur par l'intermédiaire d'une liaison mécanique. La commande est agencée de telle sorte que, la libération de la charge du ressort de fermeture provoque le chargement du ressort d'ouverture qui est maintenu dans un état chargé jusqu'à réception d'un ordre d'ouverture.Controls for high and medium voltage electrical equipment of known type include a spring to open a switch of the equipment, called opening spring and a spring to close this switch, called closing spring. The closing spring is loaded and is maintained in this state, when a closing command is given, the load is released causing the closing of the switch via a mechanical link. The control is arranged such that, releasing the load of the closing spring causes the loading of the opening spring which is maintained in a loaded state until an opening command is received.

La mise en oeuvre de ressorts chargés pour provoquer l'ouverture ou la fermeture offre un actionnement dans un temps relativement court et constant, puisque la durée est fixée de manière mécanique par la charge des ressorts et l'inertie des éléments mobiles.The implementation of loaded springs to cause the opening or closing offers actuation in a relatively short time and constant, since the duration is fixed mechanically by the load of the springs and the inertia of the moving elements.

Il est à noter qu'une des exigences de ce type de commande est d'assurer une ouverture et une fermeture mécanique en des temps réduits, inférieurs à une seconde, par exemple de l'ordre de 90 ms pour la fermeture et 20 ms à 30 ms pour l'ouverture.It should be noted that one of the requirements of this type of control is to provide mechanical opening and closing in reduced times, less than one second, for example of the order of 90 ms for closing and 20 ms at 30 ms for opening.

Par ailleurs, les éléments de transmission sont maintenus sous tension mécanique jusqu'à ce qu'un ordre d'ouverture ou de fermeture soit émis.In addition, the transmission elements are kept under mechanical tension until an opening or closing order is issued.

Par conséquent, les éléments de transmission doivent supporter une telle tension mécanique sur une durée prolongée.Therefore, the transmission elements must withstand such a mechanical tension over a prolonged period.

En outre, les éléments de transmission sont également fortement sollicités pendant un temps très court, en particulier au niveau de leurs fixations au ressort et à l'arbre correspondant. En effet, lors de la commande en ouverture, toute la charge du ressort est libérée instantanément, les efforts de traction découlant de cette détente sur l'élément de transmission à la fois au niveau de sa fixation au ressort d'ouverture et au niveau de sa fixation à l'arbre d'ouverture sont considérables. L'effort de fraction peut atteindre des dizaines de kilo newton, typiquement 30 kN.In addition, the transmission elements are also highly stressed for a very short time, in particular at their fastenings to the spring and the corresponding shaft. Indeed, during the opening command, the entire load of the spring is released instantly, the traction forces resulting from this expansion on the transmission element both at its attachment to the opening spring and at the level of its attachment to the opening shaft are considerable. The fractional effort can reach tens of kilo Newton, typically 30 kN.

Les éléments de transmission et leur connexion aux ressorts et aux arbres sont donc conçus de sorte à supporter de telles contraintes.The transmission elements and their connection to the springs and shafts are therefore designed to withstand such stresses.

En outre, ces commandes peuvent être soumises aux intempéries, et l'intérieur des commandes doit être prévu pour supporter des températures comprises entre -50°C et +50°C et peut connaître de la condensation de manière occasionnelle.In addition, these controls may be subjected to inclement weather, and the interior of the controls must be designed to withstand temperatures between -50 ° C and + 50 ° C and may experience condensation occasionally.

Ces commandes sont également destinées à être utilisées sur des durées de service très longues, par exemple plusieurs dizaines d'années.These commands are also intended to be used over very long service times, for example several decades.

Enfin ces commandes sont des éléments de sécurité dont on doit être sûr de la fiabilité.Finally these commands are security elements which must be sure of reliability.

Par conséquent, ces commandes, en particulier les éléments de transmission des efforts de fermeture et d'ouverture, sont choisies de sorte à assurer un fonctionnement sûr pendant une durée très longue et ceci dans des conditions sévères étant au niveau des contraintes appliquées qu'au niveau des conditions extérieures.Consequently, these controls, in particular the elements for transmitting closing and opening forces, are chosen so as to ensure safe operation for a very long duration and this under severe conditions being at the level of the constraints applied to the level of external conditions.

De manière connue, on utilise comme éléments de transmission une chaine à rouleaux métalliques ou un câble, par exemple dans la commande décrite dans le document FR 2 778 492 .In a known manner, a metal roller chain or a cable is used as transmission elements, for example in the control described in the document FR 2,778,492 .

Les chaines et les câbles offrent la sécurité exigée sur une période de temps longue.Chains and cables provide the security required over a long period of time.

Cependant, ils présentent une masse importante qui réduit les vitesses d'actionnement de l'interrupteur.However, they have a large mass which reduces the operating speeds of the switch.

En outre, les chaînes nécessitent un graissage afin d'éviter tout dysfonctionnement dans la transmission des efforts. Par ailleurs, elles sont sensibles à la corrosion, ce qui peut également provoquer un dysfonctionnement de la commande. De plus, les chaines ont un coût de revient élevé. Lorsqu'un câble unique est mis en oeuvre pour transmettre la commande, son diamètre doit être suffisant pour supporter la charge qui lui est appliquée. Ce diamètre augmente la rigidité du câble, ce qui implique d'utiliser des poulies de renvoi de grand diamètre, augmentant par la même l'espace requis pour une telle commande.In addition, the chains require lubrication to avoid any malfunction in the transmission of efforts. Moreover, they are sensitive to corrosion, which can also cause a malfunction of the control. In addition, the chains have a high cost. When a single cable is used to transmit the command, its diameter must be sufficient to support the load applied to it. This diameter increases the rigidity of the cable, which implies the use of large diameter return pulleys, thereby increasing the space required for such a control.

C'est par conséquent un but de la présente invention d'offrir une commande sûre pour appareillages haute et moyenne tension, offrant une inertie réduite de ses pièces mobiles résultant dans une durée propre ou temps de actionnement réduit, une facilité de maintenance et un prix de revient réduit par rapport à celui des commandes de type connu.It is therefore an object of the present invention to provide safe control for high and medium voltage switchgear, offering reduced inertia of its moving parts resulting in a clean time or reduced operating time, ease of maintenance and a price. reduced cost compared to that of orders of known type.

Le document EP1178505 décrit un dispositif selon le préambule de la revendication 1.The document EP1178505 describes a device according to the preamble of claim 1.

EXPOSÉ DE L'INVENTIONSTATEMENT OF THE INVENTION

Les buts précédemment énoncés sont atteints par une commande pour appareillages haute et moyenne tension compostant entre l'actionneur en ouverture et l'arbre d'ouverture un élément de transmission formé par une sangle souple, et entre l'actionneur en fermeture et l'arbre de fermeture un moyen de transmission formée par une sangle souple. La sangle souple selon la présente invention comporte une pluralité d'éléments longitudinaux souples destinés à relier les deux zones entre lesquelles l'effort est à transmettre, et au moins un élément transversal s'étendant entre les éléments longitudinaux.The previously stated goals are achieved by an order for high and medium voltage equipment composting between the opening actuator and the opening shaft a transmission element formed by a flexible strap, and between the closing actuator and the shaft. closing a transmission means formed by a flexible strap. The flexible strap according to the present invention comprises a plurality of flexible longitudinal elements intended to connect the two zones between which the force is to be transmitted, and at least one transverse element extending between the longitudinal elements.

Cette sangle souple peut être formée soit par une sangle en fibres textiles, soit par une pluralité de câbles parallèles noyés au moins sur une partie de leur longueur dans une matrice souple.This flexible strap can be formed either by a textile fiber strap, or by a plurality of parallel cables embedded at least for part of their length in a flexible matrix.

Dans le cas de la sangle souple formé par des câbles parallèles au moins partiellement noyés dans une matrice souple, les câbles forme les éléments longitudinaux et la matrice forme l'élément transversal. Dans le cas d'une matrice tissée, les fils de chaîne forment les éléments longitudinaux et les fils de trame forment les éléments transversaux.In the case of the flexible strap formed by parallel cables at least partially embedded in a flexible matrix, the cables form the longitudinal elements and the matrix forms the transverse element. In the case of a woven matrix, the warp yarns form the longitudinal elements and the weft yarns form the transverse elements.

Ainsi la masse de l'élément de transmission est réduite, le temps d'actionnement peut donc être réduit. En outre, il n'est plus nécessaire de prévoir un graissage de l'élément de transmission, la maintenance est donc facilitée. Par ailleurs, le coût de revient est réduit par rapport à celui d'une chaîne.Thus the mass of the transmission element is reduced, the actuation time can be reduced. In addition, it is no longer necessary to provide a lubrication of the transmission element, maintenance is facilitated. In addition, the cost price is reduced compared to that of a chain.

L'utilisation de tels éléments de transmission d'effort est permise par la réalisation de connexions particulièrement adaptées au niveau de contraintes appliquées par les actionneurs.The use of such force transmission elements is permitted by the achievement of connections particularly adapted to the level of stress applied by the actuators.

Une sangle souple formée de plusieurs câbles offre les avantages suivants :

  • celle-ci est flexible, par conséquent des poulies de renvoi de petit diamètre peuvent être utilisées. On peut rendre optimal le rayon de courbure en déterminant le nombre de câbles disposé en parallèle et le diamètre des câbles. L'encombrement est donc réduit,
  • celle-ci ne requiert peu ou pas de maintenance,
  • le temps d'actionnement est réduit du fait de l'inertie réduite de la sangle souple.
A flexible strap made up of several cables offers the following advantages:
  • this is flexible, therefore small diameter return pulleys can be used. The radius of curvature can be optimized by determining the number of cables arranged in parallel and the diameter of the cables. Congestion is reduced,
  • it requires little or no maintenance,
  • the actuation time is reduced due to the reduced inertia of the flexible strap.

La présente invention a par conséquent principalement pour objet une commande pour appareillage haute et moyenne tension comportant au moins un actionneur en ouverture/fermeture d'un interrupteur dudit appareillage, un mécanisme apte à déplacer une partie mobile dudit interrupteur et un élément de transmission d'effort, ledit élément de transmission étant formé par une sangle souple.The present invention therefore mainly relates to an order for high and medium voltage switchgear comprising at least one actuator for opening / closing a switch of said switchgear, a mechanism able to move a moving part of said switch and a force transmission element, said transmission element being formed by a flexible strap .

Ladite sangle souple est, par exemple agencée entre l'actionneur et ledit mécanisme.Said flexible strap is, for example arranged between the actuator and said mechanism.

La sangle souple peut comporter des embouts de connexion à l'actionneur et au mécanisme au niveau de ces deux extrémités, chaque embout de connexion comportant une extrémité pour la fixation d'une extrémité de la sangle souple et une extrémité pour la fixation à une tige s'étendant dans la direction de déplacement de la sangle souple ou à un axe orthogonal à ce déplacement.The flexible strap may comprise connection nozzles to the actuator and the mechanism at these two ends, each connection end having an end for attaching an end of the flexible strap and an end for attachment to a rod extending in the direction of movement of the flexible strap or at an axis orthogonal to this displacement.

Dans un mode de réalisation, la sangle souple comporte plusieurs câbles disposés parallèlement les uns par rapport aux autres et noyés au moins sur une partie de leur longueur dans une matrice souple. La matrice peut alors s'étendre de manière continue sur une grande partie de la longueur des câbles.In one embodiment, the flexible strap comprises several cables arranged parallel to each other and embedded at least for part of their length in a flexible matrix. The matrix can then extend continuously over a large part of the length of the cables.

Par exemple, la matrice est en matériau thermoplastique, par exemple en polyéthylène.For example, the matrix is made of thermoplastic material, for example polyethylene.

Les câbles sont avantageusement maintenus serrés dans au moins l'un des embouts de connexion par estampage.The cables are advantageously held tight in at least one of the connection end pieces by stamping.

La matrice peut également être maintenue serrée dans au moins l'un des embouts de connexion.The die can also be held tight in at least one of the connection bits.

Dans un exemple de réalisation, au moins l'un des embouts de connexion comporte des alésages dont les axes sont orientés dans la direction de déplacement de la sangle souple, chaque alésage recevant une extrémité libre d'un câble et dans lequel chaque câble est maintenu par estampage. Au moins l'un des embouts de connexion peut comporter un alésage transversal orthogonal aux axes des alésages et parallèle au plan contenant les axes des alésages, ledit alésage transversal pénétrant radialement dans les alésages des câbles et une goupille étant introduite dans cet alésage transversal de diamètre égal au diamètre de l'alésage transversal et pinçant les extrémités des câbles entre un périphérie de leur alésage et la goupille de manière à assurer un préassemblage avant leur assemblage définitif par estampage.In an exemplary embodiment, at least one of the connection ends comprises bores whose axes are oriented in the direction of movement of the flexible strap, each bore receiving a free end of a cable and wherein each cable is held by stamping. At least one of the connection ends may comprise a transverse bore orthogonal to the axes of the bores and parallel to the plane containing the axes of the bores, said transverse bore penetrating radially into the bores of the cables and a pin being introduced into this transverse diameter bore. equal to the diameter of the transverse bore and pinching the ends of the cables between a periphery of their bore and the pin so as to ensure a pre-assembly before their final assembly by stamping.

Avantageusement, on prévoit qu'au moins l'un des embouts de connexion comporte une face inclinée par rapport au plan contenant les axes des alésages de sorte que l'effort de maintien des câbles obtenu par estampage soit plus important du côté des extrémités fermées de l'alésage que du côté des extrémités ouvertes des alésages, la face étant inclinée par exemple d'un angle de 1, 5° par rapport au plan contenant les axes des alésages.Advantageously, it is expected that at least one of the connection ends has a face inclined relative to the plane containing the axes of the bores so that the cable holding force obtained by stamping is greater on the closed ends of the ends. the bore that the side of the open ends of the bores, the face being inclined for example at an angle of 1, 5 ° relative to the plane containing the axes of the bores.

Dans un autre mode de réalisation, la sangle souple est en fibres textiles tissées ou tressées. Ces fibres textiles sont par exemple en polyéthylène, polyester ou en aramide.In another embodiment, the flexible strap is made of woven or braided textile fibers. These textile fibers are for example polyethylene, polyester or aramid.

Dans le cas d'une sangle souple en fibres tissées ou tressées, au moins l'un des embouts de connexion peut comporter comporte un premier et un deuxième axe parallèles entre eux, et orthogonaux à la direction de déplacement de la sangle souple, les deux axes étant connectés à un élément de l'embout de connexion permettant la connexion au mécanisme ou à l'actionneur, chaque extrémité de la sangle souple s'enroulant autour des axes de l'embout de connexion, le deuxième axe étant disposé entre ledit élément de l'embout de connexion et le premier axe, la partie d'extrémité de la sangle souple étant pliée, l'extrémité de la sangle souple étant fixée sur la sangle souple de sorte à former une boucle fermée, la boucle comportant une face intérieure et une face extérieure, la boucle entourant le premier axe de sorte que sa surface intérieure soit en contact avec le premier axe et entourant le deuxième axe de sorte que sa surface extérieure soit en contact avec le deuxième axe, la portion de boucle entourant le deuxième axe étant formée d'un superposition de deux épaisseurs de sangle souple, l'extrémité de la boucle formée par l'extrémité libre de la sangle souple sortant de l'embout de connexion en cheminant le long du premier axe.In the case of a flexible strap made of woven or braided fibers, at least one of the connection pieces may comprise comprises a first and a second axis parallel to each other, and orthogonal to the direction of movement of the flexible strap, the two pins being connected to an element of the connecting piece for connection to the mechanism or the actuator, each end of the flexible strap s wrapping around the axes of the connecting piece, the second axis being disposed between said element of the connecting piece and the first axis, the end portion of the flexible strap being folded, the end of the flexible strap being fixed on the flexible strap so as to form a closed loop, the loop having an inner face and an outer face, the loop surrounding the first axis so that its inner surface is in contact with the first axis and surrounding the second axis of so that its outer surface is in contact with the second axis, the loop portion surrounding the second axis being formed of a superposition of two thicknesses of flexible strap, the extrusion emitted from the loop formed by the free end of the flexible strap coming out of the connecting piece while traveling along the first axis.

Le au moins un actionneur peut comporter un ressort et le mécanisme comporte un levier fixé en rotation sur un arbre destiné à être relié à la partie mobile de l'interrupteur.The at least one actuator may comprise a spring and the mechanism comprises a lever fixed in rotation on a shaft intended to be connected to the movable part of the switch.

La commande peut également comporter des moyens de connexion entre la sangle souple et le ressort assurant une transmission des efforts entre la sangle souple et le ressort selon l'axe du ressort.The control may also include connection means between the flexible strap and the spring ensuring a transmission of forces between the flexible strap and the spring along the axis of the spring.

Les moyens de connexion entre la sangle souple et le ressort peuvent comporter une pièce tronconique montée dans le ressort, en appui sur une spire d'extrémité du ressort par une embase, ladite pièce tronconique étant reliée à l'embout de connexion par une tige filetée vissée dans l'embout de connexion, ladite tige filetée étant solidarisée à la pièce tronconique par un premier écrou.The connecting means between the flexible strap and the spring may comprise a frustoconical piece mounted in the spring, resting on an end turn of the spring by a base, said frustoconical piece being connected to the connection end by a threaded rod. screwed into the connecting piece, said threaded rod being secured to the frustoconical piece by a first nut.

La commande peut avantageusement comporter un contre-écrou formé par un tube et un deuxième écrou, le tube étant serré entre le premier et le deuxième écrou. La longueur du tube est avantageusement au moins égale à cinq fois le diamètre de la tige filetée.The control may advantageously comprise a locknut formed by a tube and a second nut, the tube being clamped between the first and the second nut. The length of the tube is advantageously at least equal to five times the diameter of the threaded rod.

La commande selon l'invention peut également comporter des moyens de connexion entre la sangle souple et le levier assurant une connexion pivotante autour d'un axe parallèle à celui de l'arbre.The control according to the invention may also comprise connection means between the flexible strap and the lever providing a pivotal connection about an axis parallel to that of the shaft.

Le levier peut comporter un axe en saillie parallèle à l'axe de l'arbre et l'embout de connexion comporte un alésage orthogonal à la direction de déplacement de la sangle souple, ledit alésage recevant l'axe, l'embout de connexion pouvant tourner autour de l'axe.The lever may comprise an axis projecting parallel to the axis of the shaft and the connection piece has a bore orthogonal to the direction of movement of the flexible strap, said bore receiving the axis, the connection tip may turn around the axis.

L'embout de connexion peut avantageusement comporter deux parties articulées l'une par rapport à l'autre au moyen d'une biellette, les axes d'articulation étant orthogonaux à la surface de la sangle souple.The connection tip may advantageously comprise two parts articulated with respect to each other by means of a connecting rod, the hinge pins being orthogonal to the surface of the flexible strap.

L'actionneur est par exemple un actionneur d'ouverture de l'interrupteur, le levier étant un levier d'ouverture et l'arbre étant un arbre principal et comporte un deuxième actionneur formant un actionneur de fermeture de l'interrupteur.The actuator is for example an actuator opening the switch, the lever being an opening lever and the shaft being a main shaft and comprises a second actuator forming an actuator for closing the switch.

L'actionneur de fermeture peut comporter un ressort relié à un levier de fermeture par une sangle souple, le levier de fermeture étant fixé sur un arbre de fermeture parallèle à l'arbre principal sur lequel est fixé le levier d'ouverture, le levier de fermeture étant solidaire en rotation d'une came apte à agir sur le levier d'ouverture, pour provoquer la fermeture de l'interrupteur.The closing actuator may comprise a spring connected to a closing lever by a flexible strap, the closing lever being fixed on a closing shaft parallel to the main shaft on which the opening lever is fixed, the lever of closing being integral in rotation with a cam adapted to act on the opening lever, to cause the closing of the switch.

La commande peut également comporter une roue dentée pour entraîner le levier en rotation, la roue dentée engrenant un train d'engrenage entraîné par un moteur électrique pour mettre le ressort sous tension.The drive may also include a gear for driving the lever in rotation, the gear meshing with a gear train driven by an electric motor to energize the spring.

La présente invention a également pour objet un appareillage électrique haute et moyenne tension comportant une commande selon la présente invention.The present invention also relates to a high and medium voltage electrical equipment comprising a control according to the present invention.

La présente invention a également pour objet un procédé d'assemblage d'une sangle souple et d'un embout de connexion, la sangle souple comportant plusieurs câbles disposés parallèlement les uns par rapport aux autres et noyés au moins sur une partie de leur longueur dans une matrice souple, les extrémités libres des câbles n'étant pas noyées dans la matrice, et l'embout de connexion comportant autant d'alésages que de câbles, ledit procédé comportant les étapes :

  • introduction d'une extrémité de chaque câble dans un alésage,
  • application d'un effort orthogonal aux câbles sur l'embout de connexion au niveau des alésages de manière à déformer principalement les alésages par estampage.
The present invention also relates to a method of assembling a flexible strap and a connecting piece, the flexible strap comprising several cables arranged parallel to each other and embedded at least over part of their length in a flexible matrix, the free ends of the cables not being embedded in the matrix, and the connecting end having as many bores as cables, said method comprising the steps:
  • introducing an end of each cable into a bore,
  • applying an orthogonal force to the cables on the connection tip at the bores so as to deform the bores mainly by stamping.

Le procédé selon l'invention peut comporter une étape de pré-assemblage des câblés dans les alésages avant leur assemblage définitif.The method according to the invention may comprise a step of pre-assembly of the cords in the bores before their final assembly.

Le procédé selon la présente invention peut également comporter une étape d'application de moyens d'étanchéité au niveau de la connexion entre la sangle souple et les embouts de connexion, par exemple par application d'une pâte de type polyuréthane.The method according to the present invention may also comprise a step of applying sealing means at the connection between the flexible strap and the connecting tips, for example by applying a paste of the polyurethane type.

BRÈVE DESCRIPTION DES DESSINSBRIEF DESCRIPTION OF THE DRAWINGS

La présente invention sera mieux comprise à l'aide de la description qui va suivre et des dessins sur lesquels :

  • la figure 1 est une vue en perspective d'un exemple de commande d'un appareillage électrique haute ou moyenne tension selon la présente invention,
  • la figure 2 est une vue en perspective d'un détail de réalisation de la commande de la figure 1,
  • la figure 3 est une vue en perspective de l'ensemble d'actionnement de l'interrupteur en fermeture seul,
  • la figures 4 est une vue en perspective d'un exemple de réalisation de la connexion entre le ressort de fermeture et la sangle souple,
  • la figure 5 est une vue de détail de la figure 3 au niveau de la connexion entre un élément d'un actionneur et la sangle souple,
  • la figure 6 est une vue en coupe transversale d'un exemple de réalisation d'une sangle souple selon la présente invention,
  • les figures 7A à 7C sont des vues en coupe d'exemple de réalisation de poulies de renvoi mises en oeuvre dans la commande selon la présente invention,
  • les figures 8A à 8C sont des vues en perspective, de dessus et de côté d'un exemple d'embout de connexion particulièrement adapté à la fixation d'une sangle souple de la figure 6,
  • les figures 9A à 9C sont des vues en coupe longitudinale et en perspective respectivement d'un exemple d' embout de connexion particulièrement adapté à la fixation d'une sangle réalisée par tissage de fibres textiles,
  • les figures 9D et 9E sont des vues en perspective eL de côté respectivement d' une variante de réalisation de l'embout des figures 9A à 9C.
The present invention will be better understood from the following description and drawings in which:
  • the figure 1 is a perspective view of an exemplary control of a high or medium voltage electrical apparatus according to the present invention,
  • the figure 2 is a perspective view of a realization detail of the command of the figure 1 ,
  • the figure 3 is a perspective view of the actuating assembly of the closing switch alone,
  • the figures 4 is a perspective view of an exemplary embodiment of the connection between the closing spring and the flexible strap,
  • the figure 5 is a detail view of the figure 3 at the connection between an element of an actuator and the flexible strap,
  • the figure 6 is a cross-sectional view of an exemplary embodiment of a flexible strap according to the present invention,
  • the Figures 7A to 7C are sectional views of exemplary embodiment of return pulleys used in the control according to the present invention,
  • the Figures 8A to 8C are views in perspective, from above and from the side of an example of connection tip particularly adapted to the attachment of a flexible strap of the figure 6 ,
  • the Figures 9A to 9C are views in longitudinal section and in perspective respectively of an example of connection tip particularly adapted to the attachment of a strap made by weaving textile fibers,
  • the Figures 9D and 9E are perspective views eL side respectively of an embodiment variant of the tip of the Figures 9A to 9C .

EXPOSÉ DÉTAILLÉ DE MODES DE RÉALISATION PARTICULIERSDETAILED PRESENTATION OF PARTICULAR EMBODIMENTS

Sur les figures 1 et 2, on peut voir un exemple de réalisation d'une commande selon la présente invention comportant des ressorts comme actionneurs d'ouverture et de fermeture. Il est bien entendu qu'une commande utilisant des actionneurs différents et des liaisons mécaniques différentes ne sort pas du cadre de la présente invention.On the figures 1 and 2 an exemplary embodiment of a control according to the present invention can be seen comprising springs as opening and closing actuators. It is understood that a control using different actuators and different mechanical connections is not beyond the scope of the present invention.

L'exemple particulier de commande selon la présente invention comporte un mécanisme d'ouverture MO d'un interrupteur, par exemple d'un disjoncteur (non représenté) et un mécanisme de fermeture MF de l'interrupteur, disposés l'un à côté de l'autre dans un boîtier 2. Ces deux mécanismes MO et MF sont reliés mécaniquement à un arbre principal 7, lui-même connecté à une partie mobile de l'interrupteur.The particular example of control according to the present invention comprises an opening mechanism MO of a switch, for example a circuit breaker (no shown) and a closing mechanism MF of the switch, arranged next to each other in a housing 2. These two mechanisms MO and MF are mechanically connected to a main shaft 7, itself connected to a part mobile switch.

Le mécanisme d'ouverture MO comporte un moyen élastique 6 destiné à stocker une énergie mécanique par déformation et à libérer celle-ci suite à une commande d'ouverture, un élément de transmission 8 des efforts appliqués par le moyen élastique 6 et un levier 10 solidaire en rotation de l'arbre principal 7. Ce moyen élastique 6 est formé, dans l'exemple représenté par un ressort hélicoïdal sollicité en traction.The opening mechanism MO comprises an elastic means 6 intended to store mechanical energy by deformation and to release it following an opening command, a transmission element 8 of the forces applied by the elastic means 6 and a lever 10 integral with rotation of the main shaft 7. This elastic means 6 is formed in the example shown by a helical spring biased in tension.

L'élément de transmission 8 est relié par une extrémité (non visible) à une extrémité du ressort 6 et par une autre extrémité 8.2 au levier 10, de sorte qu'un effort exercé sur le levier par le ressort via l'élément de transmission provoque la rotation de l'arbre principal dans un premier sens de rotation donné sitôt que le premier système de verrouillage (non visible) débloque le levier 10, provoquant l'ouverture de l'interrupteur.The transmission element 8 is connected by one end (not visible) to one end of the spring 6 and by another end 8.2 to the lever 10, so that a force exerted on the lever by the spring via the transmission element causes rotation of the main shaft in a given first direction of rotation as soon as the first locking system (not visible) releases the lever 10, causing the opening of the switch.

Le mécanisme de fermeture MF comporte un moyen élastique 12 destiné à stocker une énergie mécanique par déformation et à libérer celle-ci suite à une commande de fermeture, des moyens de verrouillage en ouverture 11, un élément de transmission 14 des efforts appliqués par le moyen élastique 12, une came 18 solidaire en rotation d'un arbre 19, appelé arbre de fermeture, parallèle à l'arbre principal, ladite came 18 coopérant avec le levier 10. Ce moyen élastique 12 est formé, dans l'exemple représenté par un ressort hélicoïdal sollicité en traction.The closing mechanism MF comprises an elastic means 12 intended to store mechanical energy by deformation and to release it following a closing command, opening locking means 11, a transmission element 14 of the forces applied by the means elastic 12, a cam 18 integral in rotation with a shaft 19, called a closing shaft, parallel to the main shaft, said cam 18 cooperating with the lever 10. This resilient means 12 is formed in the example shown by a helical spring biased in tension.

L'élément de transmission 14 est relié par une extrémité 14.1 à une extrémité du ressort 12 et par une autre extrémité 14.2 à un disque 20 également solidaire en rotation de l'arbre de fermeture, de sorte qu'un effort exercé par le ressort sur le disque 20 provoque la rotation de la came sitôt que les moyens de verrouillage en fermeture 11 libèrent le disque 20. Ceci provoque, par coopération avec le levier 10, la rotation de l'arbre principal 7 dans un deuxième sens de rotation opposé au premier sens, provoquant la fermeture de l'interrupteur.The transmission element 14 is connected by one end 14.1 to one end of the spring 12 and by another end 14.2 to a disc 20 also integral in rotation with the closing shaft, so that a force exerted by the spring on the disc 20 causes the rotation of the cam as soon as the closing locking means 11 release the disc 20. This causes, by cooperation with the lever 10, the rotation of the main shaft 7 in a second direction of rotation opposite the first meaning, causing the switch to close.

Le disque 20 comporte un contour denté destiné à coopérer avec un train d'engrenages 21 entrainé par un moteur électrique (non représenté) et permettant de charger le ressort de fermeture 12.The disc 20 has a toothed contour intended to cooperate with a gear train 21 driven by an electric motor (not shown) and making it possible to load the closing spring 12.

Selon la présente invention, les éléments de transmission 8, 14 sont formés par une sangle ou courroie souple, présentant une forme sensiblement plate, i.e. une section dont l'épaisseur est réduite par rapport à sa largeur.According to the present invention, the transmission elements 8, 14 are formed by a strap or flexible belt, having a substantially flat shape, i.e. a section whose thickness is reduced relative to its width.

De manière plus générale, sangle souple dans la présente invention comporte une pluralité d'éléments longitudinaux souples destinés à relier les deux zones entre lesquelles l'effort est à transmettre, et au moins un élément transversal souple s'étendant entre les éléments longitudinaux.More generally, the flexible strap in the present invention comprises a plurality of flexible longitudinal elements intended to connect the two zones between which the force is to be transmitted, and at least one flexible transverse element extending between the longitudinal elements.

Ces sangles souples peuvent être formées, dans un exemple de réalisation, par tissage ou tressage de fibres textiles, par exemple des fibres de polyéthylène ou d'aramide, par exemple du Kevlar®. Le sangle souple tissée est obtenue, de manière connue, par entrecroisement de deux fils de manière que cet entrecroisement soit en angle droit. Les fils de chaîne sont disposés dans le sens de la direction longitudinale et les fils de trame, sont disposés suivant la direction transversale.These flexible straps can be formed, in one embodiment, by weaving or braiding textile fibers, for example polyethylene or aramid fibers, for example Kevlar®. The woven flexible strap is obtained, in known manner, by interlacing two son so that this interlacing is at right angles. The warp threads are arranged in the direction of the longitudinal direction and the weft threads are arranged in the transverse direction.

Dans un autre exemple de réalisation, ces sangles souples peuvent être formées par une pluralité de câbles métalliques, par exemple en acier, disposés parallèlement et noyés au moins sur une partie de leur longueur dans un matériau souple, de type thermoplastique, par exemple du polyuréthane. Les câbles forment des éléments longitudinaux et la matrice forme l'élément transversal. Un exemple d'une telle sangle souple est représenté sur la figure 6, sur laquelle on peut voir les câbles 22 disposés parallèlement les uns par rapport aux autres et la matrice 24 en matériau souple.In another exemplary embodiment, these flexible straps may be formed by a plurality of metal cables, for example made of steel, arranged in parallel and embedded at least for part of their length in a flexible material, of thermoplastic type, for example polyurethane . The cables form longitudinal elements and the matrix forms the transverse element. An example of such a flexible strap is shown on the figure 6 , on which we can see the cables 22 arranged parallel to each other and the matrix 24 of flexible material.

La matrice 24 permet de solidariser les câbles entre eux, de faciliter la manipulation de cette sangle souple et de diminuer les contraintes de pression superficielle sur les câbles.The matrix 24 makes it possible to secure the cables together, to facilitate the handling of this flexible strap and to reduce the surface pressure stresses on the cables.

De manière avantageuse, on peut prévoir que la matrice 24 recouvre toute la longueur des câbles afin de les protéger de la corrosion.Advantageously, it can be provided that the die 24 covers the entire length of the cables to protect them from corrosion.

Comme nous le verrons par la suite, des poulies de renvoi sont prévues pour guider les sangles souples. Dans une variante de réalisation, la matrice 24 n'est prévue qu'autour des zones des câbles qui ne sont pas destinées à venir glisser sur les poulies, cette absence de matrice augmente encore la souplesse de la sangle souple dans ses zones de courbure. La forme des poulies de renvoi (voir fig. 7C) peut être adaptée à cette variante de réalisation.As will be seen later, return pulleys are provided to guide the soft straps. In an alternative embodiment, the matrix 24 is provided only around the zones of the cables which are not intended to slip on the pulleys, this lack of matrix further increases the flexibility of the flexible strap in its curvature areas. The shape of the return pulleys (see Fig. 7C ) can be adapted to this variant embodiment.

Nous allons maintenant expliquer en détail les connexions entre les sangles souples et les ressorts et les autres éléments mécaniques.We will now explain in detail the connections between the soft straps and the springs and the other mechanical elements.

La description se basera sur le mécanisme de fermeture, mais celle-ci s'applique au mécanisme d'ouverture.The description will be based on the closing mechanism, but this applies to the opening mechanism.

Sur la figure 3, on peut voir le mécanisme de fermeture représenté de manière isolée, dont une partie est représentée en coupe longitudinale.On the figure 3 the closing mechanism shown in isolation can be seen, part of which is shown in longitudinal section.

La première extrémité 14.1 de la sangle souple 14 est attachée à une extrémité du ressort 12 par un moyen de connexion 26.The first end 14.1 of the flexible strap 14 is attached to one end of the spring 12 by a connecting means 26.

Le moyen de connexion 26 assure un alignement entre l'axe du ressort et la partie de la sangle souple qui lui est attachée de manière à assurer une transmission de l'effort entre le ressort et la sangle souple selon l'axe du ressort.The connection means 26 ensures alignment between the axis of the spring and the portion of the flexible strap attached thereto so as to ensure transmission of the force between the spring and the flexible strap along the axis of the spring.

Le moyen de connexion comporte une pièce tronconique 28 disposée à l'intérieur du ressort, munie à une première extrémité longitudinale d'une embase 30 en appui sur une spire 32 formant l'extrémité du ressort. De manière avantageuse, cette embase 30 est étagée et comporte une partie cylindrique 33 de plus faible diamètre pour permettre le montage d'un deuxième ressort de diamètre réduit agencé de manière coaxiale dans le premier ressortThe connection means comprises a frustoconical piece 28 disposed inside the spring, provided at a first longitudinal end with a base 30 bearing on a turn 32 forming the end of the spring. Advantageously, this base 30 is stepped and has a cylindrical portion 33 of smaller diameter to allow the mounting of a second spring of reduced diameter arranged coaxially in the first spring

La pièce tronconique comporte à une deuxième extrémité longitudinale un passage 35.The frustoconical piece has at a second longitudinal end a passage 35.

Le moyen de connexion 26 comporte également une tige 34 destinée à raccorder la première extrémité 14.1 de la sangle souple 14 à la pièce tronconique 28, la tige 34 traversant le passage 35.The connection means 26 also comprises a rod 34 intended to connect the first end 14.1 of the flexible strap 14 to the frustoconical piece 28, the rod 34 passing through the passage 35.

Dans l'exemple représenté, la tige 34 est filetée et vient se visser par une extrémité 34.1 dans un embout de connexion 36 muni d'un alésage 38 taraudé solidaire de la première extrémité 14.1 de la sangle souple 14.In the example shown, the rod 34 is threaded and is screwed by an end 34.1 into a connecting piece 36 provided with a tapped bore 38 integral with the first end 14.1 of the flexible strap 14.

Un premier écrou 40 est vissé sur la tige filetée 34 à l'intérieur de la pièce tronconique 28 et vient en butée contre le fond du tronc de cône. Dans l'exemple représenté, une rondelle 42 est prévue entre le fond du tronc de cône et le premier écrou 40.A first nut 40 is screwed onto the threaded rod 34 inside the frustoconical piece 28 and abuts against the bottom of the truncated cone. In the example shown, a washer 42 is provided between the bottom of the truncated cone and the first nut 40.

De manière avantageuse, on prévoit un contre-écrou 44 pour éviter le dévissage intempestif de l'écrou 40.Advantageously, a counter-nut 44 is provided to prevent the unwanted unscrewing of the nut 40.

Dans l'exemple représenté, le contre-écrou comporte un tube 46 et un deuxième écrou 48, entourant la tige 34 et monté en compression ente le premier 40 et le deuxième écrou 48.In the example shown, the counter-nut comprises a tube 46 and a second nut 48, surrounding the rod 34 and mounted in compression between the first 40 and the second nut 48.

De manière avantageuse, le tube 46 offre une longueur égale à au moins 5 fois le diamètre de la vis 34. Cette longueur permet d'empêcher le desserrage de cet assemblage.Advantageously, the tube 46 has a length equal to at least 5 times the diameter of the screw 34. This length prevents the loosening of this assembly.

La longueur minimale de la tige 34 est choisie de sorte que, d'une part, le ressort puisse être assemblé et mis sous tension (mécanique) à partir de sa position de repos, et d'autre part, le montage du tube 46 et du contre écrou 48 après que le réglage de la prétension du ressort soit assuré.The minimum length of the rod 34 is chosen so that, on the one hand, the spring can be assembled and energized (mechanical) from its rest position, and on the other hand, the mounting of the tube 46 and against the nut 48 after the adjustment of the pretension of the spring is ensured.

De manière avantageuse, on peut prévoir, comme représenté sur la figure 4, que l'embout de connexion 36 comporte un orifice 49 débouchant dans l'alésage 38 pour permettre le passage d'un outil destiné à déformer localement la tige et ainsi empêcher de manière simple le dévissage de la tige 34. Tout autre moyen empêchant la désolidarisation de la tige 34 et de l'embout de connexion est envisageable.Advantageously, it can be provided, as shown on the figure 4 , that the connection tip 36 has an orifice 49 opening into the bore 38 to allow the passage of a tool for locally deforming the rod and thus easily prevent the unscrewing of the rod 34. Any other means preventing the disconnection of the rod 34 and the connection tip is conceivable.

La deuxième extrémité 14.2 de la sangle souple 14 est fixée sur une pièce pivotante, dans l'exemple particulier du mécanisme de fermeture MF sur le disque 20. La liaison entre la sangle souple 14 et le disque est donc prévue de telle sorte que la sangle souple accommode cette rotation sans être sollicitée.The second end 14.2 of the flexible strap 14 is fixed on a pivoting part, in the particular example of the closing mechanism MF on the disc 20. The connection between the flexible strap 14 and the disc is therefore provided so that the strap flexible accommodates this rotation without being solicited.

Pour cela, l'extrémité 14.2 comporte un embout de connexion 50 muni d'un alésage 52 orthogonal à la direction de déplacement de la sangle souple et parallèle à l'axe de rotation du disque 20, et destiné à recevoir un ergot 54 fixé sur le disque et parallèle à son axe. L'embout de connexion 5C est monté libre de pivoter autour de l'ergot 54 formant un axe de rotation.For this, the end 14.2 comprises a connection endpiece 50 provided with a bore 52 orthogonal to the direction of movement of the flexible strap and parallel to the axis of rotation of the disc 20, and intended to receive a lug 54 fixed on the disc and parallel to its axis. The connecting piece 5C is mounted freely to pivot around the lug 54 forming an axis of rotation.

L'embout de connexion 50 et l'ergot 54 sont maintenus sur le disque au moyen d'un boulon 56, comme cela est visible sur la figure 2.The connecting end 50 and the lug 54 are held on the disc by means of a bolt 56, as can be seen on the figure 2 .

Dans un autre exemple de réalisation représenté sur la figure 5, un degré de liberté est ajouté dans l'embout de connexion 50', celui-ci n'est plus réalisé en une seule pièce mais comporte une première partie 58 fixée sur la sangle souple, une deuxième partie 60 destinée à être montée en rotation sur l'ergot 54, et une biellette 62 reliant le première 58 et la deuxième 60 partie, l'axe 63 de rotation de la biellette sur la deuxième partie 60 étant orthogonal à l'axe de l'alésage 52 destiné à recevoir l'ergot 54.In another embodiment shown on the figure 5 , a degree of freedom is added in the connecting piece 50 ', it is no longer made in one piece but includes a first portion 58 fixed on the flexible strap, a second portion 60 intended to be rotatably mounted on the lug 54, and a connecting rod 62 connecting the first 58 and the second part 60, the axis 63 of rotation of the rod on the second portion 60 being orthogonal to the axis of the bore 52 intended to receive the lug 54.

Ce degré de liberté supplémentaire offre une souplesse supplémentaire permettant d'équilibrer la charge sur toute la largeur de la sangle souple, en particulier dans le cas d'une sangle souple formée de plusieurs câbles parallèles, de répartir la charge de manière équilibrée sur tous les câbles. Ceci permet donc d'augmenter la charge applicable à la sangle souple.This additional degree of freedom provides additional flexibility to balance the load across the entire width of the flexible webbing, particularly in the case of a flexible webbing formed of several parallel cables, to distribute the load in a balanced manner over all cables. This therefore increases the load applicable to the flexible strap.

Les embouts de connexion 36, 50 sont avantageusement réalisés en acier de manière à supporter les chocs qui leur sont appliqués.The connecting tips 36, 50 are advantageously made of steel so as to withstand the shocks applied to them.

Nous allons maintenant décrire un exemple de fixation de l'âme de la sangle souple avec les embouts de connexion.We will now describe an example of attachment of the web of the flexible strap with the connecting bits.

De manière avantageuse, les câbles de la sangle souple sont serrés dans les embouts de connexion 36, 50 de manière à obtenir une solidarisation sûre de la sangle souple avec l'embout de connexion.Advantageously, the cables of the flexible strap are tightened in the connecting pieces 36, 50 so as to secure the flexible strap securely with the connection piece.

Sur la figure 4 et les figures 8A à 8C, on peut voir un type d'accrochage particulièrement adaptée à une sangle souple formée d'une pluralité de câbles parallèles. L'embout de connexion 36 comporte à son extrémité opposée à celle munie de l'alésage 38, une pluralité d'alésages 64 borgnes, recevant chacun une extrémité d'un câble et dans lesquels elles sont maintenues serrées. Les axes des alésages 64 sont contenus dans un plan contenant également l'axe de l'alésage 38.On the figure 4 and the Figures 8A to 8C , one can see a type of attachment particularly suitable for a flexible strap formed of a plurality of parallel cables. The connection tip 36 has at its end opposite to that provided with the bore 38, a plurality of blind bores 64, each receiving one end of a cable and in which they are kept tight. The axes of the bores 64 are contained in a plane also containing the axis of the bore 38.

Les alésages 64 sont parallèles et chaque alésage forme un logement pour une extrémité d'un câble. Les alésages sont disposés les uns par rapport aux autres de manière correspondante la distance dispcsition relative des câbles dans la sangle souple.The bores 64 are parallel and each bore forms a housing for one end of a cable. The bores are arranged relative to one another in a corresponding manner the relative distance of the cables in the flexible strap.

Sur la figure 8B, on peut voir l'embout de connexion 36 sans les câbles.On the Figure 8B , we can see the connection tip 36 without the cables.

De manière avantageuse, l'entrée des alésages est chanfreinée pour faciliter l'insertion des câbles dans les alésages.Advantageously, the inlet of the bores is chamfered to facilitate insertion of the cables into the bores.

Les extrémités des câbles sont retenues dans les alésages par déformation de ceux-ci par estampage, ce qui provoque un pincement des câbles.The ends of the cables are retained in the bores by deformation thereof by stamping, which causes a pinching of the cables.

Le diamètre des alésages 64 est prévu légèrement supérieur à celui des câbles.The diameter of the bores 64 is provided slightly higher than that of the cables.

De manière avantageuse, cette déformation est discrète et est effectuée le long des alésages. On prévoir d'exercer un effort sur une face 69 de l'embout de connexion parallèle au plan contenant les axes des alésages et le long des axes des alésages, et non sur toute la surface de l'embout de connexion. Ainsi, le matériau de l'embout de connexion, qui est par exemple de l'acier, se déforme autour des extrémités des câbles et remplit au moins partiellement les espaces vides entre les fils constituant les câbles et la surface intérieure de l'alésage.Advantageously, this deformation is discrete and is performed along the bores. Provision is made to exert a force on a face 69 of the connector end parallel to the plane containing the axes of the bores and along the axes of the bores, and not over the entire surface of the connection tip. Thus, the material of the connecting piece, which is for example steel, deforms around the ends of the cables and at least partially fills the voids between the son constituting the cables and the inner surface of the bore.

Sur la figure 8A, on peut voir l'outil de déformation DF, celui-ci ne comporte pas une surface plane mais une surface munie de saillies 65 parallèles entre elles et s'étendant chacune parallèlement à un axe d'un alésage 64.On the figure 8A , we can see the deformation tool DF, it does not have a surface plane but a surface provided with projections 65 parallel to each other and extending each parallel to an axis of a bore 64.

On prévoit de manière avantageuse de réaliser un pincement plus important au niveau de du fond 64a des alésages qu'au niveau de l'extrémité ouverte 64b des alésages, ce qui a pour effet d'améliorer la fixation.Advantageously, it is provided to make a greater nip at the bottom 64a of the bores than at the open end 64b of the bores, which has the effect of improving the fixing.

Comme on peut le voir sur la figure 8C, cela est obtenu par exemple en réalisant la face 69 sur laquelle va être appliqué l'effort de déformation inclinée par rapport au plan d'application de l'effort de déformation, par exemple d'un angle a de 1,5°, ou en inclinant l'outil effectuant la déformation.As can be seen on the Figure 8C this is obtained for example by producing the face 69 on which the inclined deformation force will be applied with respect to the plane of application of the deformation force, for example at an angle α of 1.5 °, or by tilting the tool performing the deformation.

L'empreinte réalisée dans l'embout de connexion est, par exemple de l'ordre de 0,5 fois le diamètre des câbles.The footprint made in the connection tip is, for example of the order of 0.5 times the diameter of the cables.

De manière particulièrement avantageuse, pour effectuer l'assemblage on prévoit un moyen pour maintenir les extrémités des câbles dans les alésages 64 avant même le pincement, afin d'éviter que l'une d'elles ne s'échappe ou ne se déplace lors de la déformation de l'embout de connexion.Particularly advantageously, for the assembly is provided means for holding the ends of the cables in the bores 64 even before the pinch, to prevent one of them from escaping or moving during deformation of the connection tip.

Ceci est réalisé, comme cela est représenté sur les figures 8A à 8C, en réalisant un alésage 70 orthogonal aux alésages 64 et s'étendant radialement dans chacun des alésages 64. Lorsque les câbles sont en place dans les alésages 64, un goupille 72 ayant le diamètre de l'alésage transversal 70 est introduite dans l'alésage et déforme légèrement les câbles, ce qui permet de réaliser un pré-assemblage des câbles et de l'embout de connexion. Par exemple, la goupille 72 pénètre dans les alésages 64 d'environ 0,3 mm.This is achieved, as shown on the Figures 8A to 8C by making a bore 70 orthogonal to the bores 64 and extending radially in each of the bores 64. When the cables are in place in the bores 64, a pin 72 having the diameter of the transverse bore 70 is introduced into the bore and slightly deforms the cables, which allows a pre-assembly of the cables and the connection tip. For example, the pin 72 enters the bores 64 of about 0.3 mm.

Par ailleurs, la goupille 72 améliore la résistance à la traction de la connexion entre les câbles 22 et l'embout de connexion 36.Moreover, the pin 72 improves the tensile strength of the connection between the cables 22 and the connection tip 36.

On pourrait prévoir d'effectuer un pré-assemblage à l'aide d'un collage, la colle est préférentiellement appliquée de manière partielle, par exemple dans le fond 64a des alésages 64.It would be possible to perform a pre-assembly using a gluing, the glue is preferentially applied in a partial manner, for example in the bottom 64a of the bores 64.

Grâce à cette technique d'assemblage, la résistance au niveau de la zone de pincement est au moins égale à la résistance de la sangle souple elle-même.Thanks to this joining technique, the resistance at the level of the nipping zone is at least equal to the resistance of the flexible strap itself.

On peut prévoir de réaliser une étanchéité pour protéger les câbles de la corrosion au niveau de la zone de pincement, par exemple en appliquant du polyuréthane sous forme de pâte sur les côtés latéraux de la matrice 24 et de l'embout de connexion 36. On peut également prévoir de venir pincer directement la matrice 24 dans un logement (non représenté) réalisée dans l'embout de connexion en amont des alésages 24 et formant une fente.It may be provided to provide a seal to protect the cables from corrosion at the pinch zone, for example by applying polyurethane in paste form on the lateral sides of the die 24 and the connection tip 36. can also provide to come directly pinch the die 24 in a housing (not shown) formed in the connection end upstream of the bores 24 and forming a slot.

Sur les figures 9A à 9C, on peut voir un exemple de réalisation de fixation d'une sangle souple réalisée en fibres textiles.On the Figures 9A to 9C an exemplary embodiment of fastening a flexible strap made of textile fibers can be seen.

Comme on peut le voir sur les figures 9A à 9C, l'extrémité de la sangle souple est enroulée autour de deux axes de l'embout de connexion.As can be seen on the Figures 9A to 9C , the end of the flexible strap is wrapped around two axes of the connection tip.

L'embout de connexion 36' comporte un étrier 74 comportant deux flasques parallèles 76 raccordés par un fond 78 muni d'un alésage 38' dans lequel est vissée une tige filetée 34 destinée à la fixation à un élément de la commande. L'embout de connexion 36' comporte un premier 80 et un deuxième 82 axe parallèles formés par des goupilles fixées par chacune de leur extrémité dans un flasque 76, le deuxième axe 82 étant disposé entre le fond 78 et l'axe 80.The connecting end 36 'comprises a stirrup 74 comprising two parallel flanges 76 connected by a bottom 78 provided with a bore 38' in which is screwed a threaded rod 34 for attachment to an element of the control. The connecting end 36 'has a first 80 and a second 82 parallel axis formed by pins fixed by each end in a flange 76, the second axis 82 being disposed between the bottom 78 and the axis 80.

Nous allons maintenant décrire l'enroulement de la sangle souple autour des axes 80, 82. La partie d'extrémité de la sangle souple est pliée en deux, l'extrémité libre de la sangle souple est fixée sur la sangle souple, par exemple par collage ou au moyen de coutures, de sorte à former une boucle fermée 90.We will now describe the winding of the flexible strap around the axes 80, 82. The end portion of the flexible strap is folded in half, the free end of the flexible strap is attached to the flexible strap, for example by bonding or seaming so as to form a closed loop 90.

Cette boucle reçoit le premier axe, les deux bandes de sangle souple sont alors superposées et s'enroulent autour du deuxième axe, puis sortent de l'embout de connexion en longeant le premier axe.This loop receives the first axis, the two flexible webbing strips are then superimposed and wrap around the second axis, then out of the connecting end along the first axis.

La boucle est formée soit après l'enroulement de la sangle souple autour des axes, soient avant, c'est alors le premier axe qui est amovible et mis en place dans la boucle.The loop is formed either after the winding of the flexible strap around the axes, or before, it is then the first axis which is removable and put in place in the loop.

L'effort de traction s'exerçant sur l'embout de connexion 36' dans une direction opposée à l'effort exercé par la sangle souple sur l'embout de connexion 36' est appliqué dans le même plan que celui recevant l'extrémité de la boucle sortant de l'embout de connexion 36' .The tensile force exerted on the connecting piece 36 'in a direction opposite to the force exerted by the flexible strap on the connecting piece 36' is applied in the same plane as that receiving the end of the loop coming out of the connecting piece 36 '.

Sur les figures 9B et 9C, on peut voir des vues en perspective de l'embout de connexion de la figure 9A sans la sangle souple.On the Figures 9B and 9C , we can see perspective views of the connection tip of the Figure 9A without the soft strap.

Dans cet exemple, les flasques 76 comportent des orifices pour le montage des extrémités longitudinales des goupilles, les goupilles comportant un épaulement 88 au niveau d'une première extrémité et à alésage taraudé 89 à une deuxième extrémité pour permettre la mis en place d'un boulon 91, assurant le maintien transversal des goupilles. Dans l'exemple représenté, le boulon a une tête hexagonale.In this example, the flanges 76 have holes for mounting the longitudinal ends of the pins, the pins having a shoulder 88 at a first end and tapped bore 89 at a second end to allow the establishment of a bolt 91, ensuring the transverse retention of the pins. In the example shown, the bolt has a hexagonal head.

Sur la figure 9D, on peut voir un embout de connexion 36" qui est variante de réalisation de l'embout de connexion 36'. Cet embout de connexion 36" diffère de l'embout de connexion 36', essentiellement par les moyens de fixation de la sangle souple.On the Figure 9D it is possible to see a connecting piece 36 "which is an alternative embodiment of the connecting piece 36 'This connecting piece 36" differs from the connection piece 36', essentially by the means of fastening the flexible strap .

Dans cette variante de réalisation, l'embout de connexion 36" comporte une première platine 100 destinée à la fixation de la sangle souple sur l'embout de connexion et une deuxième platine 102 sensiblement orthogonale à la première platine 100 destinée à permettre la connexion de l'embout 36" à un élément de la commande.In this variant embodiment, the connection endpiece 36 "comprises a first plate 100 intended for fixing the flexible strap to the connection piece and a second plate 102 substantially orthogonal to the first plate 100 intended to allow the connection of the tip 36 "to an element of the command.

Dans l'exemple, la deuxième platine 102 comporte un alésage (non visible) dans lequel est vissée une tige filetée 34 solidaire d'un élément de la commande.In the example, the second plate 102 has a bore (not visible) in which is screwed a threaded rod 34 integral with a control element.

La première platine 100 est orientée par rapport à la deuxième platine 102 de sorte à contenir l'axe de la tige filetée 34.The first plate 100 is oriented relative to the second plate 102 so as to contain the axis of the threaded rod 34.

Dans l'exemple représenté et de manière avantageuse, l'embout est réalisé d'un seul tenant par emboutissage d'une tôle, une portion emboutie 104 connecte la première 100 et la deuxième platine, cette portion emboutie 104 comporte une partie en biais pour décaler la deuxième platine 102 par rapport à la première platine et disposée l'axe de la tige filetée 34 dans le plan de la première platine 104 comme on peut le voir sur la figure 9E sur laquelle l'embout de connexion 36" est représenté de côté partiellement en coupe longitudinale.In the example shown and advantageously, the tip is made in one piece by stamping a sheet, a stamped portion 104 connects the first 100 and the second plate, this pressed portion 104 has a biased portion to shift the second plate 102 relative to the first plate and disposed the axis of the threaded rod 34 in the plane of the first plate 104 as can be seen on the Figure 9E on which the connecting end 36 "is partially shown in longitudinal section.

La première platine 100 comporte des moyens de fixation de la sangle souple sur l'embout par enroulement de la sangle souple de manière similaire à la fixation sur l'embout 36'.The first plate 100 comprises means for attaching the flexible strap to the tip by winding the flexible strap similarly to the attachment on the tip 36 '.

A cet effet, la première platine 100 comporte trois lumières 108, 110, 112 de forme oblongue, chacune ayant un axe orthogonal à l'axe de la sangle souple, ces trois lumières étant séparées par des barreaux 114, 116 formant des axes d'enroulement de la sangle souple 14.For this purpose, the first plate 100 comprises three slots 108, 110, 112 oblong, each having an axis orthogonal to the axis of the flexible strap, these three lights being separated by bars 114, 116 forming pins winding of the flexible strap 14.

Les lumières sont par exemple découpées au moyen d'un poinçon.The lights are for example cut by means of a punch.

L'enroulement est identique à celui de la figure 9A, le barreau 114 ayant la fonction de l'axe 80 et le barreau 116 ayant la fonction de l'axe 82. Cependant, on prévoit de manière avantageuse, que la sangle souple, après son enroulement autour des barres 114 et 116, pénètre à nouveau dans la lumière 108 et longe une face inférieure de la première platine 100.The winding is identical to that of the Figure 9A , the bar 114 having the function of the axis 80 and the bar 116 having the function of the axis 82. However, it is advantageously provided that the flexible strap, after its winding around the bars 114 and 116, enters again in the light 108 and runs along a lower face of the first plate 100.

L'embout de connexion 36'' est très simple de réalisation, puisqu'il ne nécessite qu'une étape d'emboutissage et de poinçonnage.The connection tip 36 '' is very simple to implement, since it only requires a drawing and stamping step.

Nous n'avons décrit qu'une extrémité de la sangle souple fixée sur un embout de connexion, mais bien entendu l'autre extrémité de la sangle souple peut être équipée d'un même embout de connexion.We have described only one end of the flexible strap attached to a connector but of course the other end of the flexible strap can be equipped with the same connection tip.

Sur la figure 2, on peut voir un levier de renfort 66 fixé sur le disque 20 et sur lequel est fixée la deuxième extrémité 14.2 de la sangle souple 14 par l'intermédiaire de l'embout de connexion 50. Ce levier permet un transfert d'effort en réduisant la flexion du disque 20.On the figure 2 , there can be seen a reinforcing lever 66 fixed to the disk 20 and on which is fixed the second end 14.2 of the flexible strap 14 via the connecting piece 50. This lever allows a transfer of effort by reducing the flexion of the disc 20.

Comme nous l'avons mentionné plus haut, les sangles souples sont guidées par des poulies 68 de renvoi assurant le changement de direction des sangles souples.As mentioned above, the flexible straps are guided by return pulleys 68 ensuring the change of direction of the flexible straps.

Le rayon minimum d'une poulie est calculé en fonction du diamètre de la sangle souple qu'elle guide. Or, grâce à la présente invention, dans le cas de la sangle souple à plusieurs câbles, le diamètre d'un câble étant réduit par rapport à l'utilisation d'un seul gros câble, des poulies de plus petit diamètre peuvent être utilisées. La taille de la commande peut donc être réduite.The minimum radius of a pulley is calculated according to the diameter of the flexible strap that it guides. However, thanks to the present invention, in the case of the multi-cable flexible strap, the diameter of a cable being reduced compared to the use of a single large cable, pulleys of smaller diameter can be used. The size of the order can be reduced.

Sur les figures 7A à 7C, on peut voir des exemples de réalisation de ces poulies. Les poulies sont montées sur des roulements 92.On the Figures 7A to 7C examples of embodiments of these pulleys can be seen. The pulleys are mounted on bearings 92.

La surface 94 des poulies en contact ave la sangle souple peut être de différents types. Elle peut être lisse, formée par un cylindre à section circulaire et bordés par deux guides latéraux 96 (figure 7A).The surface 94 of the pulleys in contact with the flexible strap may be of different types. It can be smooth, formed by a cylinder of circular section and bordered by two lateral guides 96 ( Figure 7A ).

La surface 94' peut être bombée sensiblement en son centre, permettant un meilleur guidage de la sangle souple (figure 7B).The surface 94 'can be curved substantially at its center, allowing better guidance of the flexible strap ( Figure 7B ).

Sur la figure 7C, la surface 94" comporte des rainures annulaires 98 coaxiales à l'axe de la poulie, destinées à recevoir chacune une portion de câble prévue au niveau des parties à nu de la sangle souple.On the Figure 7C , the surface 94 "has annular grooves 98 coaxial with the axis of the pulley, each intended to receive a portion of cable provided at the bare portions of the flexible strap.

La connexion de la sangle souple 8 au levier 10 s'effectue de manière identique à la connexion de la sangle souple 14 au disque 20, i.e. au moyen d'un embout de connexion 77 monté en rotation autour d' un axe parallèle à l'axe principal. Dans l'exemple particulier, cet axe est monté entre deux flasques 81 du levier 10.The connection of the flexible strap 8 to the lever 10 is effected in the same way as the connection of the flexible strap 14 to the disk 20, ie by means of a connecting piece 77 mounted in rotation about an axis parallel to the main axis. In the particular example, this axis is mounted between two flanges 81 of the lever 10.

La connexion de la sangle souple 8 au ressort 6 est similaire à celle de la sanglé souple 14 au ressort 12, i.e. au moyen d'une pièce tronconique et d'une tige filetée.The connection of the flexible strap 8 to the spring 6 is similar to that of the flexible strap 14 to the spring 12, i.e. by means of a frustoconical piece and a threaded rod.

Il est bien entendu qu'une sangle souple munie de deux embouts, chacun de structure différente à ses deux extrémités ne sort pas du cadre de la présente invention.It is understood that a flexible strap provided with two end pieces, each of different structure at its two ends is not beyond the scope of the present invention.

Nous allons maintenant expliquer le fonctionnement de la commande décrite à titre d'exemple.We will now explain the operation of the command described by way of example.

Le moteur entraîne en rotation le disque denté 20 via le train d'engrenages 21, l'ergot 54 est par conséquent entraîné en rotation autour de l'arbre de fermeture 19. La deuxième extrémité 14.2 de la sangle souple 14 est entraînée de sorte que la première extrémité 14.1 de la sangle souple se déplace, comprimant ainsi le ressort 12.The motor rotates the toothed disk 20 via the gear train 21, the pin 54 is consequently rotated about the closing shaft 19. The second end 14.2 of the flexible strap 14 is driven so that the first end 14.1 of the flexible strap moves, compressing the spring 12.

Un premier dispositif de verrouillage 11 est prévu pour bloquer la rotation du disque 20 lorsque le niveau d'énergie stocké dans le ressort 12 est suffisant, ce qui correspond à une rotation du disque de quelques degrés après que le point mort haut a été dépassé.A first locking device 11 is provided to block the rotation of the disc 20 when the energy level stored in the spring 12 is sufficient, which corresponds to a rotation of the disc a few degrees after the top dead center has been exceeded.

Lorsqu'un ordre de fermeture de l'interrupteur est donné, le premier dispositif de verrouillage 11 libère le disque 20, qui, sous l'effort exercé par le ressort 12 via la sangle souple 14, est entraîné en rotation, entraînant l'arbre de fermeture 19, et la came 18. La came 13 vient alors en contact avec le levier 10, qui pivote, entraînant l'arbre principal 7 en rotation dans un deuxième sens de rotation, ce qui provoque le déplacement de l'élément mobile de l'interrupteur et la fermeture de l'interrupteur. Un deuxième dispositif de verrouillage bloque le levier 10 lorsque le position fermée du contact est atteinte.When an order to close the switch is given, the first locking device 11 releases the disk 20, which, under the force exerted by the spring 12 via the flexible strap 14, is rotated, driving the shaft 19, and the cam 18. The cam 13 then comes into contact with the lever 10, which pivots, driving the main shaft 7 in rotation in a second direction of rotation, which causes the displacement of the movable member the switch and the closing of the switch. A second locking device locks the lever 10 when the closed position of the contact is reached.

Simultanément, le déplacement du levier 10 provoque une traction de la sangle souple 8, ce qui a pour effet de comprimer le ressort d'ouverture 6.Simultaneously, the movement of the lever 10 causes a pull of the flexible strap 8, which has the effect of compressing the opening spring 6.

Ensuite, le moteur est activé pour recharger le ressort de fermeture 12 comme décrit précédemment.Then, the motor is activated to reload the closing spring 12 as previously described.

Lorsqu'un ordre d'ouverture de l'interrupteur est donné, le deuxième dispositif de verrouillage libère le levier 1C, qui, sous l'effort exercé par le ressort 6 via la sangle souple 8, est entraîné en rotation, entraînant l'arbre principal 7 dans le premier sens de rotation provoquant l'ouverture de l'interrupteur.When an order to open the switch is given, the second locking device releases the lever 1C, which, under the force exerted by the spring 6 via the flexible strap 8, is rotated, driving the shaft main 7 in the first direction of rotation causing the opening of the switch.

La commande haute et moyenne tension selon la présente invention mettant en oeuvre des sangles souples comme éléments de transmission offre un fonctionnement sûr sur une période de temps suffisante.The high and medium voltage control according to the present invention using flexible straps as transmission elements provides safe operation over a sufficient period of time.

En effet, la commande selon la présente invention offre l'avantage de fonctionner sans nécessiter de lubrification, la maintenance associée est donc supprimée et le risque d'usure engendrée par une mauvaise lubrification est également supprimé.Indeed, the control of the present invention has the advantage of operating without requiring lubrication, the associated maintenance is removed and the risk of wear caused by poor lubrication is also removed.

En outre, les éléments de transmission ne sont pas sensibles à la corrosion.In addition, the transmission elements are not susceptible to corrosion.

Les éléments de transmission offrent une masse réduite par rapport aux chaînes généralement utilisées, la quantité d'énergie nécessaire pour les opérations d'ouverture et de fermeture est donc diminuée. Par ailleurs, les masses en mouvement étant réduites, le temps d'ouverture-fermeture peut être réduit d'environ 3 ms à 4 ms.The transmission elements have a reduced mass compared to the generally used chains, so the amount of energy required for the opening and closing operations is reduced. Furthermore, the moving masses being reduced, the open-close time can be reduced from about 3 ms to 4 ms.

Par ailleurs, les sangles souples ont un encombrement réduit par rapport aux chaines, ce qui permet de réduire la taille de la commande.In addition, the flexible straps have a smaller footprint compared to the chains, which reduces the size of the order.

Enfin, ces éléments de sangle souple ont un coût de revient bien moindre par rapport à ceux généralement utilisés, ce qui permet de réduire le coût de revient de la commande, ceci étant d'autant plus remarquable que l'exemple de commande décrit met en oeuvre deux éléments de transmission d'effort.Finally, these flexible strap elements have a much lower cost compared to those generally used, which allows to reduce the cost of the order, this being all the more remarkable that the described control example sets out works two elements of transmission of effort.

La description a été faite en prenant comme exemple l'utilisation de sangle souple flexible pour la transmission d'effort entre un actionneur et les leviers d'un mécanisme de commande. Mais, il est bien entendu que les sangles souples telles que décrites ci-dessus peuvent être utilisées à tout endroit dans la chaîne de transmission des efforts entre un actionneur, par exemple un ressort et le contact mobile d'un appareillage de commutation à haute ou moyenne tension, dans lequel on applique des efforts de tension aux sangles souples. Par exemple, les sangles souples décrites ci-dessus peuvent être utilisées pour transmettre des efforts entre un mécanisme de commande et un disjoncteur avec un ressort d'ouverture disposé au niveau du disjoncteur.The description has been made taking as an example the use of flexible flexible strap for the transmission of force between an actuator and the levers of a control mechanism. But, it is understood that the flexible straps as described above can be used anywhere in the chain of transmission of forces between an actuator, for example a spring and the moving contact of a switchgear with high or medium voltage, in which tension is applied to the flexible straps. For example, the soft straps described above can be used to transmit forces between a control mechanism and a circuit breaker with an opening spring disposed at the circuit breaker.

Claims (22)

  1. A drive device for high and medium voltage switchgear, comprising at least one actuator (6, 12) for opening and closing an interrupter of said apparatus, a mechanism adapted to move a movable part of said interrupter and a force transmission element (8, 14), said force transmission element (8, 14) connecting two zones between which the force has to be transmitted, said transmission element being formed by a flexible strap, characterized in that said flexible strap comprise a plurality of flexible longitudinal elements intended to connect the two zones between which the force has to be transmitted, and at least one flexible transversal element extending between the longitudinal elements, said longitudinal elements being formed by a plurality of cables disposed parallel to one another and embedded in a flexible matrix (24) over at least part of their length, said flexible strap (8, 14) having end connectors (36, 36', 36", 50, 50') for coupling it to the actuator (6, 12) and to said mechanism at the two ends of the flexible strap, each end connector having a fastening end for fastening to an end of the flexible strap and a fastening end for fastening the connector either to a rod that extends in the direction of movement of the flexible strap, or to a pin orthogonal to said movement, said end connectors (36) being formed with bores (64), the axes of which are oriented in the direction of movement of the flexible strap, each bore (64) receiving a free end of a said cable, and wherein each cable is held in place by stamping.
  2. A drive device according to claim 1, wherein said matrix (24) extends continuously over a major portion of the length of said cables.
  3. A drive device according to claim 2, wherein said matrix (24) is held gripped in the end connectors (36, 50, 50').
  4. A drive device according to claim 1, 2 or 3, wherein said matrix (24) is made of a thermoplastic material, for example polyethylene.
  5. A drive device according to claim 1, wherein the flexible strap is arranged between the actuator (6, 12) and said mechanism.
  6. A drive device according to any one of the claims 1 to 5, wherein each end connector (36) has a transverse hole (70) extending orthogonal to the axes of said bores (64) and parallel to the plane containing the axes of said bores (64) for the cables, a pin (72) being introduced into said transverse hole (70), the pin having a diameter equal to the diameter of the transverse hole (70) whereby to grip the ends of each cable between a periphery of the corresponding bore (64) and the pin (72), thereby providing pre-assembly before final assembly by stamping.
  7. A drive device according to claim 6, wherein the end connectors (36) have a face (69) that is inclined relative to the plane containing the axes of said bores (64), so that the retaining force on the cables obtained by stamping is greater on the same side as the closed ends (64a) of the bores (64) than on the side of the open ends (64b) of the bores (64), said face being inclined for example by an angle of 1.5° relative to the plane containing the axes of the bores (64).
  8. A drive device according to any preceding claim, wherein said at least one actuator comprises a spring (6, 12), and said mechanism includes a lever (10, 66) that is fixed rotatably on a shaft (7, 19) adapted to be coupled to the movable part of the interrupter.
  9. A drive device according to claim 15, further including coupling means (26) for coupling the flexible strap (14) and the spring (12) together for the transmission of forces between the flexible strap (14) and the spring (12) along the axis of the spring (12).
  10. A drive device according to claim 9, wherein the coupling means (26) coupling the flexible strap (14) and spring (12) together include a frusto-conical member (28) mounted within the spring (12) and in engagement on an end turn (32) of the spring (12) through a base portion (30) of the frusto-conical member, said frusto-conical member (28) being coupled to the end connector (36) via a threaded rod (34) that is screwed in the end connector (36), said threaded rod (34) being fixed to the frusto-conical member (28) by means of a first nut (40).
  11. A drive device according to claim 10, further including locknut means comprise a tube (46) and a second nut (48), said tube (46) being gripped between the first nut (40) and the second nut (48).
  12. A drive device according to claim 11, wherein the length of said tube (46) is equal to at least five times the diameter of the threaded rod (34).
  13. A drive device according to any one of claims 8 to 12, further including coupling means for coupling the flexible strap (8, 14) and the lever (10, 66) together and making a pivot around an axis parallel to the axis of said shaft (7, 29).
  14. A drive device according to claim 13, wherein the lever (10, 66) has a projecting axle parallel to the axis of the shaft (7, 19), and the end connector (50, 50') has a bore (52) orthogonal to the direction of movement of the flexible strap (8, 14), said bore (52) receiving the axle, and the end connector (50, 50') being rotatable about the axle.
  15. A drive device according to claim 13 or claim 14, wherein the end connector comprises two parts (58, 60) articulated to each other by means of a coupling rod (62), the articulating pins (63) being orthogonal to the surface of the flexible strap (8, 14).
  16. A drive device according to any one of claims 8 to 15, wherein said actuator is an interrupter opening actuator, the lever (10) being an opening lever and said shaft (7) being a main shaft, the drive device further having a second actuator that constitutes an interrupter closing actuator.
  17. A drive device according to claim 16, wherein the closing actuator comprises a spring (12) connected to a closing lever (66) through a said flexible strap (14), the closing lever (66) being fixed on a closing shaft (19) parallel to the main shaft (7) on which the opening lever is fixed, the closing lever (66) being fixed to a cam (18) for rotation with the cam, which is adapted to act on the opening lever (10) whereby to cause the interrupter to close.
  18. A drive device according to claim 17, further including a toothed driving wheel (20) for driving the closing lever (66) in rotation, the toothed driving wheel (20) meshing with a gear train (21) that is driven by an electric motor, whereby to put the spring (12) under load.
  19. High or medium voltage switchgear having a drive device according to any preceding claim.
  20. A method of manufacturing a drive device according to any one of claims 1 to 18, comprising the step of assembling a drive flexible strap and an end connector together, the flexible strap comprising a plurality of cables disposed parallel to one another and embedded over at least part of their length in a flexible matrix (24), the free ends of the cables not being embedded in the matrix, and the end connector being formed with bores, the number of said bores being the same as the number of cables, and said method comprising the steps of:
    - introducing one end of each cable into a respective bore; and
    - applying a stamping force, orthogonal to the cables, to the end connector at said bores, in such a manner as to deform the bores, mainly, by stamping.
  21. A method according to claim 20, further including the step of preassembling the cables in said bores before final assembly.
  22. A method according to claim 20 or claim 21, further including the step of applying sealing means to the joint between the flexible strap and the end connectors, for example by application of a polyurethane type paste.
EP09753952A 2008-05-30 2009-05-29 Control for a high-voltage/medium-voltage electrical device having a short actuation time Not-in-force EP2283501B1 (en)

Priority Applications (1)

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EP11173109.7A EP2375429B1 (en) 2008-05-30 2009-05-29 Control for high- and medium-voltage electrical appliance with reduced actuating time

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0853584A FR2931997A1 (en) 2008-05-30 2008-05-30 CONTROL FOR HIGH AND MEDIUM VOLTAGE ELECTRICAL APPARATUS WITH REDUCED ACTUATION TIME.
PCT/EP2009/056598 WO2009144297A1 (en) 2008-05-30 2009-05-29 Control for a high-voltage/medium-voltage electrical device having a short actuation time

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EP11173109.7 Division-Into 2011-07-07

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EP2283501B1 true EP2283501B1 (en) 2012-03-14

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KR (1) KR101651918B1 (en)
CN (1) CN102047363B (en)
AT (1) ATE549730T1 (en)
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WO2012090037A1 (en) * 2010-12-31 2012-07-05 Abb Technology Ltd Circuit breaker
FR2990051B1 (en) * 2012-04-25 2014-05-30 Alstom Technology Ltd SPRING TYPE CONTROL (S) OF A HIGH VOLTAGE OR MEDIUM VOLTAGE SWITCH PROVIDED WITH A RATTER WHEEL COUPLING DEVICE
CN103065827B (en) * 2012-12-28 2015-07-01 常熟开关制造有限公司(原常熟开关厂） Operating mechanism with automatic switch transfer
CN103021692B (en) * 2012-12-28 2015-10-28 常熟开关制造有限公司(原常熟开关厂） A kind of switching mechanism of switchgear operating mechanism
CN103903905B (en) * 2014-04-11 2016-07-06 辽宁易德实业集团有限公司 Opening and closing induction current vacuum switch device
DE102017218863A1 (en) * 2017-10-23 2019-04-25 Siemens Aktiengesellschaft Drive device for an electric switch and use of the drive device for switching
CN108058757B (en) * 2017-11-27 2019-07-09 华中科技大学 A kind of bionical driving unit of biped robot's kneecap impedance

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DE3432696A1 (en) * 1984-09-03 1986-03-13 Siemens AG, 1000 Berlin und 8000 München DRIVING DEVICE FOR A CIRCUIT BREAKER WITH Eccentric and Directional Lock
FR2597564B2 (en) * 1986-04-21 1989-08-18 Hutchinson IMPROVED POWER TRANSMISSION BELT
ES2000025A4 (en) * 1985-10-29 1987-09-16 Hutchinson Sa PERFECTED POWER TRANSMISSION BELT.
FR2778492B1 (en) * 1998-05-11 2000-06-23 Alsthom Gec SPRING CONTROL FOR CIRCUIT SWITCH
FR2812760B1 (en) * 2000-08-04 2002-09-13 Schneider Electric High Voltag DRIVE CHAIN MECHANISM FOR HIGH VOLTAGE CUT-OUT ELECTRICAL EQUIPMENT

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EP2375429A1 (en) 2011-10-12
EP2283501A1 (en) 2011-02-16
ATE549730T1 (en) 2012-03-15
EP2375429B1 (en) 2014-02-12
KR101651918B1 (en) 2016-08-29
KR20110028296A (en) 2011-03-17
CN102047363A (en) 2011-05-04
WO2009144297A1 (en) 2009-12-03
CN102047363B (en) 2014-12-03

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