WO2019129651A1 - Coupling bolt for high-current connectors - Google Patents

Coupling bolt for high-current connectors Download PDF

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Publication number
WO2019129651A1
WO2019129651A1 PCT/EP2018/086256 EP2018086256W WO2019129651A1 WO 2019129651 A1 WO2019129651 A1 WO 2019129651A1 EP 2018086256 W EP2018086256 W EP 2018086256W WO 2019129651 A1 WO2019129651 A1 WO 2019129651A1
Authority
WO
WIPO (PCT)
Prior art keywords
coupling bolt
coupling
opening
head drive
screw head
Prior art date
Application number
PCT/EP2018/086256
Other languages
French (fr)
Inventor
Markus Hardi
Original Assignee
Tyco Electronics Raychem Gmbh
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 Tyco Electronics Raychem Gmbh filed Critical Tyco Electronics Raychem Gmbh
Publication of WO2019129651A1 publication Critical patent/WO2019129651A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/53—Bases or cases for heavy duty; Bases or cases for high voltage with means for preventing corona or arcing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
    • F16B5/0275—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread the screw-threaded element having at least two axially separated threaded portions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/621—Bolt, set screw or screw clamp
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/56—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation one conductor screwing into another
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/18—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using screw-thread elements
    • F16B7/185—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using screw-thread elements with a node element

Definitions

  • the invention relates to a coupling bolt for coupling two in particular angled high-voltage connectors.
  • the coupling bolt comprises an oblong base body, which has an opening that extends in the longitudinal direction from one end and an opening that extends counter to the longitudinal direction from the opposite end, in which openings at least one formed internal thread is arranged, and which is provided with at least one screw head drive for coupling to an operating point of a bit tool.
  • the invention relates to an arrangement having at least two in particular angled high-voltage connectors.
  • cables are connected to a switching system.
  • the cables are coupled to a switching system by means of a bushing. Since the number of bushings on a switching system, and space, is limited, it is advantageous if several cables can be connected to a bushing.
  • the connection needs to be electrically insulated to the outside.
  • e.g. angled high-voltage connectors are used, which have an opening for the cable end and an opening for connection to the socket.
  • the high-voltage connector can have a further opening for coupling to a further high-voltage connector.
  • These connectors are known as symmetrically constructed T- connectors or asymmetrically constructed T-connectors or L-connectors.
  • a coupling bolt For the coupling of two connectors, a coupling bolt is used, which conducts the current from the switching system to the second connector via the bushing and the first connector.
  • the coupling bolt needs to have a high current transmission rate, and needs to be simple to mount while also saving space.
  • the object is achieved according to the invention, for the coupling bolt mentioned at the outset, in that the screw head drive is arranged in at least one opening between the end of the opening and the internal thread.
  • the screw head drive is arranged between the end of the through-hole and the internal thread, as a result of which a tool with its operating point can be inserted deeply into the screw head drive relatively easily, so that mounting is facilitated and the coupling bolt can have a large contact surface, since the through-hole does not have to be expanded in order to allow the coupling of the operating point of a tool to the screw head drive.
  • the object according to the invention is also achieved by the arrangement mentioned at the outset, in that a coupling bolt, as is described above and below, is arranged between the two connectors.
  • the screw head drive can be a hexagon socket, whereby simple mounting is possible when space is limited.
  • an Allen key in particular having a spherical head, the coupling bolt can be screwed in simply, even when the tool engages at an angle.
  • the screw head drive can be a Torx drive.
  • a Torx screw head drive it is possible to transmit a high torque and at the same time avoid the risk of the screw head drive turning round. The turning round would lead to the operating point of the tool no longer being coupled to the screw head drive, and thus mounting and unmounting of the coupling bolt would no longer be possible.
  • the openings that extend from the respective ends can be arranged coaxially or eccentrically depending on the coupling bolt geometry.
  • the openings can have the same diameter.
  • the two openings which extend from the respective ends can be continuous, so that the coupling bolt is penetrated by a through-hole.
  • the user has greater flexibility when selecting the depth of insertion of the fastening screw.
  • the coupling bolt can have a cylindrical form. This makes it possible to produce the coupling bolt by turning.
  • the coupling bolt has the form of a straight circular cylinder.
  • the current can be conducted further to the next cable end via the cross-sectional area of the circular cylinder. Since in the case of a circular cylinder the maximum possible contact surface is achieved, the maximum possible current is thus transmitted.
  • the cross-sectional area can take up over 90% of the total cross-section of the coupling bolt. It is thereby possible to transmit current with a high current intensity of e.g. up to 2400 A.
  • the coupling bolt can be composed of copper, preferably electrolytic copper.
  • the coupling bolt can be coated, at least at the contact surfaces, with a corrosion-resistant coating, preferably with a tin coating.
  • the coating is for example 10 pm thick and can be made up of multiple layers.
  • the coupling bolt can have, at at least one end, a countersink that opens into the opening.
  • This countersink can be used to receive a shoulder of a screw or a nut.
  • the countersink is arranged between the screw head drive and the end of the coupling bolt lying next to the screw head drive.
  • the coupling bolt can have a further screw head drive, which can be formed e.g. as a hexagon head at the shell surface of the coupling bolt. If a higher torque is necessary or if the first screw head drive is damaged e.g.
  • the second screw head drive can serve as a replacement.
  • the second screw head drive can be arranged at the same end as the first screw head drive or at the opposite end. If the screw head drive is arranged at the opposite end, the mounting direction can be chosen as desired, depending on the usage requirements.
  • the coupling bolt can have a further screw head drive at its shell surface.
  • the circular cylinder can have at least two segment-shaped cutouts arranged parallel to each other, so that the circular cylinder has two parallel planar surfaces on its shell surface, which planar surfaces can be brought into engagement using e.g. a spanner.
  • the second screw head drive can be arranged on the same side as the first screw head drive or on the opposite side. The second screw head drive preferably cannot abut a contact surface of the coupling bolt. This avoids the contact surface being reduced by the cutout.
  • the outer diameter of the coupling bolt can be adapted in the best possible way to the maximum space available and for example can be between 40 and 60 mm in size. This allows a large contact surface between the coupling bolt and the high-current connector, which e.g. has the form of a cable lug. Furthermore, the coupling bolt with these dimensions can thereby be received in an insulating housing, which electrically insulates the connectors and the socket to the outside. According to a further advantageous configuration, the length of the coupling bolt can be between 50 and 200 mm depending on the voltage class of the connectors and their design and/or construction space.
  • the arrangement can have at least one fastening screw, which couples the coupling bolt to a connector.
  • the connector can have a cable lug, the eyelet of which aligns with the through- hole of the coupling bolt.
  • a cable lug makes a simple screw connection of the connector and the bushing and/or the coupling bolt possible.
  • a fastening screw can be screwed in the coupling bolt, said fastening screw having a shoulder.
  • the shoulder here can restrict the screwing-in of the fastening screw into the coupling bolt.
  • the depth of the countersink can correspond to the width of the shoulder.
  • the fastening screw can have a screw head drive for coupling of the coupling bolt to the connector, whereby the screwing-in of the fastening screw is facilitated.
  • the fastening screw can be secured using a screw lock.
  • the connector can be fixed between the coupling bolt and the screw lock. As a result, the coupling does not come undone even under strong vibrations.
  • the screw lock can be configured e.g. in the form of a washer and nut. If it is desired to couple a coupled high-voltage connector to a further high-voltage connector, the screw lock can be produced in the form of an additional coupling bolt.
  • the bushing serves as a screw lock, which clamps the cable end between it and the coupling bolt.
  • Fig. 1 shows a schematic perspective view of a coupling bolt according to the invention
  • Fig. 2 shows a schematic sectional view of the coupling bolt depicted in Fig. 1;
  • Fig. 3 shows a schematic perspective view of a further coupling bolt according to the invention
  • Fig. 4 shows a schematic sectional view of an arrangement according to the invention.
  • Fig. 5 shows a schematic side view of a fastening screw.
  • FIG. 1 A schematic perspective view of a coupling bolt 1 according to the invention is depicted in Fig. 1. Furthermore, the coupling bolt 1 of Fig. 1 is shown in a schematic sectional view in Fig. 2, sectioned in the longitudinal direction L.
  • the coupling bolt 1 has an oblong base body 2 in the form of a straight circular cylinder 4.
  • the length 5 of the coupling bolt 1 in this exemplary configuration is between 100 and 200 mm at a voltage level of 72 kV.
  • the circular surfaces 6 of the cylinder serve as a contact surface 8 for contacting with an electrical conductor 10, which can be formed e.g. as a cable lug 12.
  • the outer diameter 13 of the coupling bolt 1 fully utilises the available cross-sectional area and can be between 40 and 60 mm at a voltage class of 72 kV.
  • an opening 14 extends in the longitudinal direction L, which opening is arranged coaxially with respect to the opening 14a, which extends from the opposite end 18 counter to the longitudinal direction L.
  • the openings 14, 14a are in each case provided with an internal thread 16, 16a.
  • the openings 14, 14a are interconnected in this configuration, as a result of which the coupling bolt is penetrated by a through-hole 15.
  • a thread-free region 20 is arranged in the through-hole 15.
  • the thread-free region 20 delimits the screw-in length of a fastening screw 22, if this can be screwed in from one of the two ends 18, 24.
  • the through-hole 15 is provided with a screw head drive 26, which, in this exemplary configuration, has the form of a hexagon socket 28 with a standardised width across flats 29 of e.g. WAF 17. Between the hexagon socket 28 and the end 24, the through-hole 14 widens in the form of a step 30, so that the coupling bolt 1 has, at the end 24, a planar countersink
  • planar countersink 32 which opens into the through-hole 15.
  • the planar countersink 32 has a diameter 33, runs in the longitudinal direction L from the hexagon socket 28 to the end 24 of the through-hole 15 and has the depth 35.
  • the contact surfaces 8 have, at their outer edges 34, a chamfer 36 that can serve as an introduction guide for the coupling bolt 1 and helps to protect the surfaces of the other components from damage.
  • the coupling bolt 1 has, at its shell surface 38, two flattened regions 40 produced by cutting out segments of a circle that are arranged parallel and preferably of the same size, which flattened regions extend from the outer edge 34 of the end 18 counter to the longitudinal direction L
  • These flattened regions 40 serve as a second screw head drive 26a, by means of which the coupling bolt 1 can be screwed securely to a high-voltage connector 42.
  • the flattened regions 40 extend counter to the longitudinal direction L, so that e.g. a spanner (not shown) can be brought into engagement with the coupling bolt 1.
  • the screw head drive 26 is simple to reach, and the tool (not shown) does not have to penetrate deeply into the coupling bolt 1 in order to bring its operating point into engagement with the screw head drive 26.
  • the second screw head drive 26a which is formed by the flattened regions 40, the mounting direction can be chosen as desired by the user.
  • a schematic perspective view of a further coupling bolt 1 according to the invention is depicted in Fig. 3.
  • FIG. 4 an arrangement 44 according to the invention is depicted in a schematic sectional view, having two high-voltage connectors 42 and a coupling bolt 1, which couples the high-voltage connectors 42 to each other.
  • the arrangement 44 has a base connector 46 and a coupling connector 48. Both connectors 46, 48 have a T-shaped housing 50, in the stem 52 of which in each case a high-voltage cable 54 is inserted.
  • the high-voltage cables 54 in each case terminate in a cable lug 12, which projects into the horizontal region 56 of the respective T-shaped housing 50.
  • the T-shaped housing 50 of the base connector 46 has, at its respective arms 58, 58a, a receptacle 60, 60a that tapers to the middle.
  • a socket 62 with a fastening screw 22 is inserted into the receptacle 60 facing away from the coupling bolt 1.
  • the fastening screw 22 penetrates the eyelet opening 64 of the cable lug 12 and is provided with an external thread 66, onto which the coupling bolt 1 is screwed by its internal thread 16a. As a result, the cable lug 12 is clamped between socket 62 and coupling bolt 1.
  • the coupling bolt 1 was screwed securely to the cable lug 12, and thus also to the base connector 46, using a tool (not shown), the operating point of which can be brought into engagement with the hexagon socket 28.
  • the coupling bolt 1 in this case is inserted into the arm 58 of the base connector 46 until the contact surface 8 abuts the cable lug 12.
  • the fastening screw 22a has a front end 70 and a rear end 72. At its front end 70, the fastening screw 22a is provided with the external thread 73, so that it can be screwed into the internal thread 16 of the coupling bolt 1. For this purpose, the fastening screw 22 has a screw head drive 75 at the rear end 72.
  • a thread-free section 74 runs in the longitudinal direction L from the external thread 73 of the front end 70, which thread-free section has a smaller diameter than the front end 70.
  • the transition from the front end to the thread-free section 74 is formed by a chamfer 36.
  • the thread-free section 74 extends in the longitudinal direction L as far as a shoulder 78, the width 83 of which in the longitudinal direction L matches the depth 35 of the planar countersink 32 of the coupling bolt 1.
  • the diameter 82 of the shoulder 78 is designed to correspond to the diameter 33 of the planar countersink 32.
  • the shoulder 78 lies flush in the planar countersink 32 when the fastening screw 22 is screwed in completely and does not stand proud of the surface 6, such that the electrical contacting and the mechanical fastening of the surface 6 to the surface of the cable lug 12 is not impaired.
  • a thread-free through-section 84 which is inserted in the eyelet opening 64a of the cable lug 12 of the coupling connector 48, extends in the longitudinal direction L from the shoulder 78 to the rear end 72.
  • the thread-free through-section 84 is optional and can be omitted in other embodiments of the fastening screw.
  • the fastening screw 22a is provided with an external thread 73a, which serves for receiving a screw lock 86.
  • a screw lock 86 can be screwed on and can clamp the cable lug 12 between the contact surface 8 of the coupling bolt and the screw lock 86.
  • the screw lock 86 is depicted as a nut 88.
  • a further coupling bolt 1 can serve as a screw lock 86, so that the cable lug 12 is clamped between two coupling bolts 1.
  • the coupling connector 48 has an arm 89 with a coupling region 90, the outer contour 92 of which tapers towards the outside, so that it can be inserted into the opening 60a of the base connector 46. Furthermore, the coupling region 90 has a cylindrical bolt receptacle 94, into which the coupling bolt 1 is received.
  • the coupling connector 48 has, at its arm 89a away from the base connector 46, a receptacle 96 which is designed analogously to the receptacle 60a of the base connector.
  • a further coupling connector (not shown) can thereby be coupled to the coupling connector 48.

Abstract

The invention relates to a coupling bolt (1) for coupling two in particular angled high-voltage connectors (42) having an oblong base body (2), which has an opening (14) that extends from one end (24) in the longitudinal direction (L) and an opening (14a) that extends from the opposite end (18) counter to the longitudinal direction (L), has at least one internal thread (16, 16a) formed in the openings (14, 14a), which is provided with a screw head drive (26) for coupling to an operating point of a bit tool, the screw head drive (26) being arranged in the opening (14) between the end (24) of the opening (14) and the internal thread (16). Moreover, the invention relates to an arrangement (44) having at least two in particular angled high-voltage connectors (42), a coupling bolt (1) being arranged between the two high- voltage connectors (42). By positioning the screw head drive (26) between the internal thread (16) and the end (24) of the opening (14), simple mounting of the coupling bolt (1) is possible, even when space is limited. By using a screw head drive (26) driven by a bit, it is possible to produce a coupling bolt (1) having a maximum outer diameter (13), so that maximum current transmission takes place via the cross- section of the coupling bolt (1).

Description

Coupling bolt for high-current connectors
The invention relates to a coupling bolt for coupling two in particular angled high-voltage connectors. The coupling bolt comprises an oblong base body, which has an opening that extends in the longitudinal direction from one end and an opening that extends counter to the longitudinal direction from the opposite end, in which openings at least one formed internal thread is arranged, and which is provided with at least one screw head drive for coupling to an operating point of a bit tool. Furthermore, the invention relates to an arrangement having at least two in particular angled high-voltage connectors.
For high-voltage installations, cables are connected to a switching system. For this purpose, the cables are coupled to a switching system by means of a bushing. Since the number of bushings on a switching system, and space, is limited, it is advantageous if several cables can be connected to a bushing. Furthermore, the connection needs to be electrically insulated to the outside. For this purpose, e.g. angled high-voltage connectors are used, which have an opening for the cable end and an opening for connection to the socket. Moreover, the high-voltage connector can have a further opening for coupling to a further high-voltage connector. These connectors are known as symmetrically constructed T- connectors or asymmetrically constructed T-connectors or L-connectors.
For the coupling of two connectors, a coupling bolt is used, which conducts the current from the switching system to the second connector via the bushing and the first connector. For this purpose, the coupling bolt needs to have a high current transmission rate, and needs to be simple to mount while also saving space. Thus, it is the object of the invention to provide a coupling bolt having a maximum current transmission rate, which is simple to produce and can be mounted in a space-saving manner.
The object is achieved according to the invention, for the coupling bolt mentioned at the outset, in that the screw head drive is arranged in at least one opening between the end of the opening and the internal thread. The screw head drive is arranged between the end of the through-hole and the internal thread, as a result of which a tool with its operating point can be inserted deeply into the screw head drive relatively easily, so that mounting is facilitated and the coupling bolt can have a large contact surface, since the through-hole does not have to be expanded in order to allow the coupling of the operating point of a tool to the screw head drive. The object according to the invention is also achieved by the arrangement mentioned at the outset, in that a coupling bolt, as is described above and below, is arranged between the two connectors.
The solution according to the invention can be further improved by various configurations which are advantageous per se and which can be combined with one another as desired. These configurations and the advantages associated with them shall be explored in greater detail hereinafter.
According to a first advantageous configuration, the screw head drive can be a hexagon socket, whereby simple mounting is possible when space is limited. By using e.g. an Allen key, in particular having a spherical head, the coupling bolt can be screwed in simply, even when the tool engages at an angle.
According to a further advantageous configuration, the screw head drive can be a Torx drive. When using a Torx screw head drive, it is possible to transmit a high torque and at the same time avoid the risk of the screw head drive turning round. The turning round would lead to the operating point of the tool no longer being coupled to the screw head drive, and thus mounting and unmounting of the coupling bolt would no longer be possible.
The openings that extend from the respective ends can be arranged coaxially or eccentrically depending on the coupling bolt geometry. The openings can have the same diameter.
In a further configuration, the two openings which extend from the respective ends can be continuous, so that the coupling bolt is penetrated by a through-hole. When using a through-hole, the user has greater flexibility when selecting the depth of insertion of the fastening screw.
In order to reduce the manufacturing costs, the coupling bolt can have a cylindrical form. This makes it possible to produce the coupling bolt by turning. Preferably the coupling bolt has the form of a straight circular cylinder. As a result, when the cable end of a connector is coupled to the coupling bolt, a maximum size of contact surface is produced. The current can be conducted further to the next cable end via the cross-sectional area of the circular cylinder. Since in the case of a circular cylinder the maximum possible contact surface is achieved, the maximum possible current is thus transmitted. In a further configuration, the cross-sectional area can take up over 90% of the total cross-section of the coupling bolt. It is thereby possible to transmit current with a high current intensity of e.g. up to 2400 A.
In order to obtain good electrical conductivity, the coupling bolt can be composed of copper, preferably electrolytic copper. In order to prevent oxidation at the surface of the coupling bolt, the coupling bolt can be coated, at least at the contact surfaces, with a corrosion-resistant coating, preferably with a tin coating. The coating is for example 10 pm thick and can be made up of multiple layers.
According to a further advantageous configuration, the coupling bolt can have, at at least one end, a countersink that opens into the opening. This countersink can be used to receive a shoulder of a screw or a nut. Advantageously, the countersink is arranged between the screw head drive and the end of the coupling bolt lying next to the screw head drive. As a result, e.g. nuts can be inserted into the countersink in such a way that they never project out over the end face after mounting, even under all tolerance configurations. The coupling bolt can have a further screw head drive, which can be formed e.g. as a hexagon head at the shell surface of the coupling bolt. If a higher torque is necessary or if the first screw head drive is damaged e.g. by turning round, the second screw head drive can serve as a replacement. The second screw head drive can be arranged at the same end as the first screw head drive or at the opposite end. If the screw head drive is arranged at the opposite end, the mounting direction can be chosen as desired, depending on the usage requirements.
In order to simplify the release of the coupling bolt, the coupling bolt can have a further screw head drive at its shell surface. For this purpose, the circular cylinder can have at least two segment-shaped cutouts arranged parallel to each other, so that the circular cylinder has two parallel planar surfaces on its shell surface, which planar surfaces can be brought into engagement using e.g. a spanner. The second screw head drive can be arranged on the same side as the first screw head drive or on the opposite side. The second screw head drive preferably cannot abut a contact surface of the coupling bolt. This avoids the contact surface being reduced by the cutout.
According to a further advantageous configuration, the outer diameter of the coupling bolt can be adapted in the best possible way to the maximum space available and for example can be between 40 and 60 mm in size. This allows a large contact surface between the coupling bolt and the high-current connector, which e.g. has the form of a cable lug. Furthermore, the coupling bolt with these dimensions can thereby be received in an insulating housing, which electrically insulates the connectors and the socket to the outside. According to a further advantageous configuration, the length of the coupling bolt can be between 50 and 200 mm depending on the voltage class of the connectors and their design and/or construction space.
The arrangement can have at least one fastening screw, which couples the coupling bolt to a connector. In one configuration, the connector can have a cable lug, the eyelet of which aligns with the through- hole of the coupling bolt. A cable lug makes a simple screw connection of the connector and the bushing and/or the coupling bolt possible.
According to a further advantageous configuration, a fastening screw can be screwed in the coupling bolt, said fastening screw having a shoulder. The shoulder here can restrict the screwing-in of the fastening screw into the coupling bolt. Preferably, the depth of the countersink can correspond to the width of the shoulder. As a result, upon complete screwing-in, the shoulder is inserted flush or recessed into the countersink, so that the coupling bolt with its contact surface can always lie directly against the cable lug of the connector.
According to a further advantageous configuration, the fastening screw can have a screw head drive for coupling of the coupling bolt to the connector, whereby the screwing-in of the fastening screw is facilitated.
In a further advantageous configuration, the fastening screw can be secured using a screw lock. In order to guarantee secure contacting of the coupling bolt to a connector, the connector can be fixed between the coupling bolt and the screw lock. As a result, the coupling does not come undone even under strong vibrations.
The screw lock can be configured e.g. in the form of a washer and nut. If it is desired to couple a coupled high-voltage connector to a further high-voltage connector, the screw lock can be produced in the form of an additional coupling bolt. For the connection of a high-voltage connector to the bushing of a switching system, the bushing serves as a screw lock, which clamps the cable end between it and the coupling bolt.
Hereinafter, the invention is explained in greater detail by way of example using advantageous configurations with reference to the drawings. The advantageous further developments and configurations depicted here are each independent of one another and can be freely combined with one another, depending on how this is necessary in the specific application. In the drawings:
Fig. 1 shows a schematic perspective view of a coupling bolt according to the invention;
Fig. 2 shows a schematic sectional view of the coupling bolt depicted in Fig. 1;
Fig. 3 shows a schematic perspective view of a further coupling bolt according to the invention;
Fig. 4 shows a schematic sectional view of an arrangement according to the invention; and
Fig. 5 shows a schematic side view of a fastening screw.
A schematic perspective view of a coupling bolt 1 according to the invention is depicted in Fig. 1. Furthermore, the coupling bolt 1 of Fig. 1 is shown in a schematic sectional view in Fig. 2, sectioned in the longitudinal direction L. The coupling bolt 1 has an oblong base body 2 in the form of a straight circular cylinder 4. The length 5 of the coupling bolt 1 in this exemplary configuration is between 100 and 200 mm at a voltage level of 72 kV. The circular surfaces 6 of the cylinder serve as a contact surface 8 for contacting with an electrical conductor 10, which can be formed e.g. as a cable lug 12. The outer diameter 13 of the coupling bolt 1 fully utilises the available cross-sectional area and can be between 40 and 60 mm at a voltage class of 72 kV. From one end 24, an opening 14 extends in the longitudinal direction L, which opening is arranged coaxially with respect to the opening 14a, which extends from the opposite end 18 counter to the longitudinal direction L. The openings 14, 14a are in each case provided with an internal thread 16, 16a. The openings 14, 14a are interconnected in this configuration, as a result of which the coupling bolt is penetrated by a through-hole 15.
Between the internal threads 16 and 16a, a thread-free region 20 is arranged in the through-hole 15. The thread-free region 20 delimits the screw-in length of a fastening screw 22, if this can be screwed in from one of the two ends 18, 24.
Between the end 24 and the internal thread 16, the through-hole 15 is provided with a screw head drive 26, which, in this exemplary configuration, has the form of a hexagon socket 28 with a standardised width across flats 29 of e.g. WAF 17. Between the hexagon socket 28 and the end 24, the through-hole 14 widens in the form of a step 30, so that the coupling bolt 1 has, at the end 24, a planar countersink
32 which opens into the through-hole 15. The planar countersink 32 has a diameter 33, runs in the longitudinal direction L from the hexagon socket 28 to the end 24 of the through-hole 15 and has the depth 35. The contact surfaces 8 have, at their outer edges 34, a chamfer 36 that can serve as an introduction guide for the coupling bolt 1 and helps to protect the surfaces of the other components from damage.
At its end 18 away from the hexagon socket 28, the coupling bolt 1 has, at its shell surface 38, two flattened regions 40 produced by cutting out segments of a circle that are arranged parallel and preferably of the same size, which flattened regions extend from the outer edge 34 of the end 18 counter to the longitudinal direction L These flattened regions 40 serve as a second screw head drive 26a, by means of which the coupling bolt 1 can be screwed securely to a high-voltage connector 42. The flattened regions 40 extend counter to the longitudinal direction L, so that e.g. a spanner (not shown) can be brought into engagement with the coupling bolt 1. By positioning the hexagon socket 28 between the internal thread 16 and the end 24, simple mounting of the coupling bolt 1 is possible. The screw head drive 26 is simple to reach, and the tool (not shown) does not have to penetrate deeply into the coupling bolt 1 in order to bring its operating point into engagement with the screw head drive 26. By way of the second screw head drive 26a, which is formed by the flattened regions 40, the mounting direction can be chosen as desired by the user. A schematic perspective view of a further coupling bolt 1 according to the invention is depicted in Fig. 3.
In this case, the flattened regions 40 do not extend from the outer edge 34 of the end 18 counter to the longitudinal direction L, but rather are arranged at a distance from this end. As a result, the end contact surface is not reduced, which brings advantages in the case of current transmission and mechanical stability. In Fig. 4, an arrangement 44 according to the invention is depicted in a schematic sectional view, having two high-voltage connectors 42 and a coupling bolt 1, which couples the high-voltage connectors 42 to each other.
The arrangement 44 has a base connector 46 and a coupling connector 48. Both connectors 46, 48 have a T-shaped housing 50, in the stem 52 of which in each case a high-voltage cable 54 is inserted. The high-voltage cables 54 in each case terminate in a cable lug 12, which projects into the horizontal region 56 of the respective T-shaped housing 50.
The T-shaped housing 50 of the base connector 46 has, at its respective arms 58, 58a, a receptacle 60, 60a that tapers to the middle. A socket 62 with a fastening screw 22 is inserted into the receptacle 60 facing away from the coupling bolt 1. The fastening screw 22 penetrates the eyelet opening 64 of the cable lug 12 and is provided with an external thread 66, onto which the coupling bolt 1 is screwed by its internal thread 16a. As a result, the cable lug 12 is clamped between socket 62 and coupling bolt 1.
The coupling bolt 1 was screwed securely to the cable lug 12, and thus also to the base connector 46, using a tool (not shown), the operating point of which can be brought into engagement with the hexagon socket 28. The coupling bolt 1 in this case is inserted into the arm 58 of the base connector 46 until the contact surface 8 abuts the cable lug 12.
At an end 24 of the through-hole 15, away from the base connector 46, a further fastening screw 22a is screwed in, the schematic side view of which is depicted in Fig. 5.
The fastening screw 22a has a front end 70 and a rear end 72. At its front end 70, the fastening screw 22a is provided with the external thread 73, so that it can be screwed into the internal thread 16 of the coupling bolt 1. For this purpose, the fastening screw 22 has a screw head drive 75 at the rear end 72.
A thread-free section 74 runs in the longitudinal direction L from the external thread 73 of the front end 70, which thread-free section has a smaller diameter than the front end 70. The transition from the front end to the thread-free section 74 is formed by a chamfer 36. The thread-free section 74 extends in the longitudinal direction L as far as a shoulder 78, the width 83 of which in the longitudinal direction L matches the depth 35 of the planar countersink 32 of the coupling bolt 1. The diameter 82 of the shoulder 78 is designed to correspond to the diameter 33 of the planar countersink 32. As a result, the shoulder 78 lies flush in the planar countersink 32 when the fastening screw 22 is screwed in completely and does not stand proud of the surface 6, such that the electrical contacting and the mechanical fastening of the surface 6 to the surface of the cable lug 12 is not impaired.
A thread-free through-section 84, which is inserted in the eyelet opening 64a of the cable lug 12 of the coupling connector 48, extends in the longitudinal direction L from the shoulder 78 to the rear end 72. The thread-free through-section 84 is optional and can be omitted in other embodiments of the fastening screw. From the through-section 84 to the rear end 72, the fastening screw 22a is provided with an external thread 73a, which serves for receiving a screw lock 86. As a result, a screw lock 86 can be screwed on and can clamp the cable lug 12 between the contact surface 8 of the coupling bolt and the screw lock 86. In Fig. 4, the screw lock 86 is depicted as a nut 88. If a further coupling connector 48 is to be coupled, a further coupling bolt 1 can serve as a screw lock 86, so that the cable lug 12 is clamped between two coupling bolts 1. The coupling connector 48 has an arm 89 with a coupling region 90, the outer contour 92 of which tapers towards the outside, so that it can be inserted into the opening 60a of the base connector 46. Furthermore, the coupling region 90 has a cylindrical bolt receptacle 94, into which the coupling bolt 1 is received. The coupling connector 48 has, at its arm 89a away from the base connector 46, a receptacle 96 which is designed analogously to the receptacle 60a of the base connector. A further coupling connector (not shown) can thereby be coupled to the coupling connector 48.
Reference symbols
1 coupling bolt
2 base body
4 circular cylinder
5 length
6 circular surface
8 contact surface
10 electrical conductor
12 cable lug
13 outer diameter
14, 14a opening
15 through-hole
16, 16a internal thread
18 opposite end
20 thread-free region
22, 22a fastening screw
24 end
26, 26a screw head drive
28 hexagon socket
30 step
32 planar countersink
33 diameter
34 outer edge
35 depth
36 chamfer
38 shell surface
40 flattened region
42 high-voltage connector
44 arrangement
46 base connector
48 coupling connector
50 T-shaped housing
52 stem 54 high-voltage cable
56 horizontal region
58, 58a arm
60, 60a receptacle
62 socket
64 eyelet opening
66 external thread
68 netting tube
70 front end
72 rear end
73, 73a external thread
74 thread-free section
78 shoulder
82 diameter
83 width
84 through-section
86 screw lock
88 nut
89 arm
90 coupling region
92 outer contour
94 bolt receptacle
L longitudinal direction

Claims

Claims
1. A coupling bolt (1) for coupling two in particular angled high-voltage connectors (42) having an oblong base body (2), which has an opening (14) that extends from one end (24) in the longitudinal direction (L) and an opening (14a) that extends from its other end (18) counter to the longitudinal direction (L), has at least one internal thread (16, 16a) formed in the openings (14), and which is provided, in an opening (14), with a screw head drive (26) for coupling to an operating point of a bit tool, characterised in that at least one screw head drive (26) is arranged in the opening (14) between the end (24) of the opening (14) and the internal thread (16).
2. The coupling bolt (1) according to Claim 1, characterised in that the coupling bolt (1) is cylindrical.
3. The coupling bolt (1) according to Claim 1 or 2, characterised in that the coupling bolt (1) has at least one countersink (32) that opens into an opening (14, 14a).
4. The coupling bolt (1) according to any one of Claims 1 to 3, characterised in that the coupling bolt (1) has a further screw head drive (26a).
5. An arrangement (44) having at least two in particular angled high-voltage connectors (42), characterised in that a coupling bolt (1) according to any one of Claims 1 to 4 is arranged between the angled high voltage connectors (42).
6. The arrangement (44) according to Claim 5, characterised in that at least one fastening screw (22a) is screwed in the coupling bolt (1), said fastening screw having a shoulder (78).
7. The arrangement (44) according to Claim 5 or 6, characterised in that the high-voltage connectors (42) each have a cable lug (12), between which the coupling bolt (1) is arranged.
8. The arrangement (44) according to Claim 7, characterised in that at least one cable lug (12) is clamped between a screw lock (86) and the coupling bolt (1).
PCT/EP2018/086256 2017-12-27 2018-12-20 Coupling bolt for high-current connectors WO2019129651A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017223811.9A DE102017223811B4 (en) 2017-12-27 2017-12-27 Coupling bolts for high-current plugs
DE102017223811.9 2017-12-27

Publications (1)

Publication Number Publication Date
WO2019129651A1 true WO2019129651A1 (en) 2019-07-04

Family

ID=64899355

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/086256 WO2019129651A1 (en) 2017-12-27 2018-12-20 Coupling bolt for high-current connectors

Country Status (2)

Country Link
DE (1) DE102017223811B4 (en)
WO (1) WO2019129651A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4857021A (en) * 1988-10-17 1989-08-15 Cooper Power Systems, Inc. Electrical connector assembly and method for connecting the same
US20160141801A1 (en) * 2014-11-17 2016-05-19 Thomas & Betts International, Llc Grounding link for electrical connector mechanism

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3855570A (en) * 1972-10-02 1974-12-17 Itt Electrical interconnect device
DK159225C (en) * 1982-02-20 1991-03-04 Y S Securities Ltd ELECTRIC CONNECTOR FOR HIGH POWER AND CONNECTION ARRANGEMENTS WITH SUCH A CONNECTOR
DE3233572C2 (en) * 1982-09-10 1986-01-09 Felten & Guilleaume Energietechnik GmbH, 5000 Köln Single-phase termination plug-in connection for connecting a cable conductor to a switching device, in particular to an SF ↓ 6 ↓ switchgear
US4779341A (en) * 1987-10-13 1988-10-25 Rte Corporation Method of using a tap plug installation tool
FR2686195B1 (en) * 1992-01-09 1995-02-10 Pirelli Cables Sa DEVICE FOR DETACHABLE CONNECTION OF MEDIUM VOLTAGE ELECTRICAL CABLES.
EP0652608A1 (en) * 1993-11-05 1995-05-10 Siemens Schweiz AG Device for connecting and joining electric conductors
US7491075B2 (en) * 2005-07-28 2009-02-17 Cooper Technologies Company Electrical connector
US8602800B2 (en) * 2010-04-20 2013-12-10 Thomas & Betts International, Inc. Electrical connector having alignment mechanism
US9124050B2 (en) * 2012-07-19 2015-09-01 Thomas & Betts International Llc Electrical connector having grounding mechanism

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4857021A (en) * 1988-10-17 1989-08-15 Cooper Power Systems, Inc. Electrical connector assembly and method for connecting the same
US20160141801A1 (en) * 2014-11-17 2016-05-19 Thomas & Betts International, Llc Grounding link for electrical connector mechanism

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DE102017223811A1 (en) 2019-07-11

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