Classifications

• • 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
  • F16B39/00—Locking of screws, bolts or nuts
  • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
  • F16B39/24—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object
• • 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
  • F16B2/00—Friction-grip releasable fastenings
  • F16B2/005—Means to increase the friction-coefficient
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
  • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
  • H02B1/015—Boards, panels, desks; Parts thereof or accessories therefor
  • H02B1/04—Mounting thereon of switches or of other devices in general, the switch or device having, or being without, casing
  • H02B1/044—Mounting through openings

Definitions

• the invention relates to an anti-twist device for screw connections, in particular ⁇ for mounting on electrical cable entry screw connections, which are used for guiding through, holding and sealing electrical cables for use in ⁇ electrical control cabinets.
• Known anti-rotation devices are spring washers, spring washers or
• a large number of cable bushings are used in electrical control cabinets in order to insert electrical cables safely and relieved of strain and, in particular, tightly from the outside into a control cabinet made of sheet steel or plastic.
• Such cable bushings are screw connections which are standardized for a range of sizes and which consist of a cylindrical sleeve 1 which has a circumferential flange on the inside in the center, on which a sealing ring made of 2 rubber rests, which surrounds the cable. Above the flange, the sleeve 3 has an internal thread into which a hexagon threaded ring is screwed to hold the rubber ring inserted into the sleeve.
• the sleeve 5 has a tapered external thread which is offset from the outside diameter of the cylinder 6 by means of a flat shoulder which, after the 7 thread has been pushed through a through hole in the control cabinet, rests on the edge of the 8 hole, on the A hexagon lock nut is screwed on.
• the counter nut is screwed onto the thread of the cylinder, the same can easily be twisted because the surface of paragraph 1 slides on the smooth surface of the sheet metal of the control cabinet.
• a cable that has already passed through the screw connection cannot be sealed and held in accordance with regulations by means of 3 the rubber of the screw connection.
• the invention is based on the object of securing against rotation for screwing
• the anti-rotation device according to the invention consists of a flat ring made of paper, canvas, plastic or metal, which is coated o on its two main surfaces with a fine-grained abrasive or emery material.
• the ring can advantageously consist of at least two
• the anti-rotation device has the advantage that when tightening the screw connection 7 or the counter-holder or the lock nut, the part of the ⁇ screw connection which is at rest no longer rotates, but remains at rest relative to the rotating part Screw connection, the lock nut no longer rotates on the housing plate, but remains at rest relative to the housing plate.
• the anti-rotation lock advantageously prevents the lock nut (3) (counter ring) from spinning when tightening, which is why it is not necessary to hold the counter nut. This makes it possible to use screw connections in the smallest of spaces.
• the anti-rotation device Due to the very flat and thin design of the anti-rotation device, it can be used even with thick walls, since the design with a fine-grained grinding or Scib-mirgel material gives high friction between the parts and the wall in the smallest space. 9 0 Since the anti-twist device in the form of a ring can consist of double-layered sanding paper or 1 emery paper or canvas, which is glued together with the non-coated 2 surfaces so that the coated surfaces face outwards, the anti-twist device can be manufactured extremely inexpensively . ⁇ Furthermore, according to VDE regulations for the insertion of cables and wires
• the ⁇ anti-rotation lock can be used in all plastic screw connections, 7 however not the known anti-rotation locks of the prior art. Furthermore, in the known anti-rotation devices, there is a risk that the plastic lock nut will be damaged or destroyed if it is tightened too much. The ⁇ o is no longer the case when using the anti-rotation device according to the invention.
• Another advantage of the anti-rotation lock is that it acts as a seal
• the screw connection for example a cable entry screw connection, acts. Because the screw connections and the associated holes are generally standardized, whereby there is play between the screw connection and the hole. This play seals the anti-twist device, since it compresses somewhat when it is pulled together, whereby the abrasive or emery material is pressed flatly, thereby creating a seal, so that the seat of the same inside the bore is sealed in a spray and dust-tight manner .
• Figure 1 is a plan view of an annular anti-rotation device
• FIG. 2 shows a section along the line A-A in FIG. 1
• Figure 3 shows a section through a further anti-rotation
• Figure 4 shows a cable entry screw connection in a control cabinet.
• the anti-rotation device 1 consists of a flat ring 2 made of paper, cardboard, linen
• FIG. 30 is coated with a fine-grained abrasive or emery material, which is shown in FIG. 1
• the anti-rotation device 11 can consist of a ring made of multilayer,
• Figure 4 shows an electrical cable entry screw connection 6 for passing through, holding and in particular sealing electrical cables, in particular
• the screw cylinder 7 has at one end a tapered external thread 8, which is offset from the external ⁇ diameter of the cylinder 7 by means of a flat shoulder which follows
• a hexagon lock nut 9 is screwed onto the external thread 8 from the outside onto the wall 5.
• a flat, flexible ring 2 made of paper, cardboard, canvas or plastic is placed on the wall as a ⁇ anti-rotation device
• the 20th end of the cylinder 7 has an internal thread in which a threaded insert 2i 10 with an external thread is arranged to hold a rubber ring arranged inside the cylinder.
• the anti-rotation device according to the invention can be advantageous for a large number of
• the anti-rotation device is advantageous for electrical cable entry

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Power Engineering (AREA)
• Connector Housings Or Holding Contact Members (AREA)
• Insertion, Bundling And Securing Of Wires For Electric Apparatuses (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6454170

Family Applications (1)

Country Status (3)

Cited By (1)

Families Citing this family (5)

Citations (5)

• 1992
  • 1992-03-16 DE DE19924208356 patent/DE4208356C1/de not_active Expired - Fee Related
• 1993
  • 1993-03-13 AU AU36262/93A patent/AU3626293A/en not_active Abandoned
  • 1993-03-13 WO PCT/DE1993/000231 patent/WO1993019303A1/de active Application Filing

Patent Citations (5)

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