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
  • H01R13/58—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable
  • H01R13/59—Threaded ferrule or bolt operating in a direction parallel to the cable or wire

Definitions

• the present invention pertains to the electrical outlets or plugs for industrial and/or tertiary use with a device for clamping the electrical cable in such devices.
• the electrical outlets or plugs for industrial and/or tertiaiy use comprise a body and a connecting jack.
• the latter is enclosed in the body and may have connection openings in the case of an outlet or pins in the case of a plug that are turned towards one end of the body.
• the openings or pins of the jack are then connected to the corresponding electric wires of a cable, which enter from the opposite end of the body.
• the cable is usually clamped in the body.
• this clamping was carried out using various systems, but usually with a tie-type clamping cable, i.e., with a band which is placed in the body or is attached to the jack and which is tightened around the cable by means of at least one clamping screw.
• a tie-type clamping cable i.e., with a band which is placed in the body or is attached to the jack and which is tightened around the cable by means of at least one clamping screw.
• the object of the present invention is to propose a device for clamping the cable in electrical outlets or plugs, which is simpler, easier, and is able to facilitate the clamping/release of the cable even without the availability of tools.
• Another object of the present invention is to propose a device to clamp the cable in electrical outlets or plugs which advantageously uses such parts of the outlet or plug body for the clamping, without, i.e., resorting to additional and
• Another object is to propose an electrical outlet or plug having a device for clamping the cable, which also incorporates means capable of preventing its accidental release, when the cable is clamped, to prevent an unintentional and uncontrolled detachment of the clamping elements when they are in the release position for the insertion or removal of the cable in the outlet or ping.
• the said objects are accomplished, according to the present invention, with a device that essentially comprises a grip element arranged in the body of the outlet or plug, between this [body] and a threaded locking nut, on the inlet side of the cable, the grip element being joined with the said body by means of a conical connection and being tightened around the cable to be clamped after screwing the locking nut onto the body.
• Figure 1 shows an example of an electrical plug which is assembled and is attached to a cable
• Figure 2 shows an exploded view of a part of the plug body and the means for clamping the cable in a first embodiment
• Figure 3 shows a sectional view of the device of Figure 2 with the cable in the clamped state
• Figure 4 shows, in an exploded view, a part of the body of the outlet or plug, the grip element and the locking nut in another embodiment
• Figure 5 shows a cross section of the components illustrated in Figure 4, but assembled
• Figure 6 shows an axial section of the clamping device but in the release position, in which the nut and grip element are in the withdrawn position in relation to the body, and they remain, however, joined to this [body];
• Figure 7 shows, in an exploded view, a part of the body of the outlet or plug
• Figure 8 shows the connection of the grip element with the body of the outlet or plug according to the embodiment of Figure 7;
• Figures 9 and 10 show perspective and lateral views of all the components of the outlet or plug of Figure 7 assembled, respectively;
• Figure 11 shows a [sic, un una should be just una - Tr.Ed.] longitudinal section of the unit of Figures 9 and 10.
• an electrical plug which consists of a body or grip 11 and a holding element 12, which are joined to one another and which enclose a connecting jack, which, in the case shown, is shown with the pins 13 ( Figure 1), is indicated globally as 10.
• a collar 11' which has, on the outside, a threading 15 on which a locking nut 16 is screwed and, on the inside, a seat 17 with the conical grooves 17' in the longitudinal direction, is provided at this end of the element of the body 11 (see Figure 2).
• the jaws 19 have at least one conical part 19' and are turned towards the seat 17 in the collar 11' of the body, fitting into the conical grooves 17'.
• the annular portion 20 of the grip element 18 is turned towards, and interacts with, an annular striking surface 21, which is provided inside the nut 16.
• an annular striking surface 21 which is provided inside the nut 16.
• the body 111 of an electrical outlet or plug is shown only partially in its end part, in which it has a collar 111' with an external threading 115, onto which a locking nut 116 is screwed.
• a seat 117 which has conical grooves 117' in the longitudinal direction is also provided in the body 111, and a grip element 118 is mounted between the said collar 111' and the nut 116 for clamping the electric cable, which is passed through there centrally.
• the grip element 118 has the flexible jaws 119 that come from an annular portion 120 and that have a conical portion 119', which is intended to be joined with the conical grooves 117 in the collar of the body.
• the annular portion 120 of the grip element 118 is turned towards, and interacts with, an annular striking surface 121 inside the locking nut 116.
• the grip element 118 is also provided with one or, more preferably, two diametrically opposed tongues 122, 123, which are parallel to its jaws 119 and are intended to be inserted in corresponding indentations 124, 125 provided on the outside of the body 111.
• a first tongue 122 may be in the form of an attachment to the grip element 118, lying halfrvay between two contiguous jaws 119, projecting towards the outside of same.
• the second tongue 123 is in a position halfway between two contiguous jaws 119, but moved outwards in relation to same and extending from the annular portion 120.
• the first tongue 122 is longer than the second tongue 123, and correspondingly, the indentation 124 intended to accommodate it is longer than the indentation 125 provided for the other tongue 123, and the longer tongue protrudes from the opening of the nut 116.
• Two lateral locking teeth 122', 123' are provided on the sides of each tongue
• Two opposing teeth 124', 125' which are turned towards one another, are provided on the sides of each indentation 124, 125, close to the free end of the collar 111', respectively.
• the tongues 122, 123 of the grip element 118 are inserted by force into the respective indentations 124, 125 of the body 111, so that the said element may slide axially in relation to the said body.
• the lateral teeth 122', 123' of the tongues 122, 123 strike against the teeth 124', 125' on the sides of the indentations 124, 125 so as to stop the element proper, thus preventing its detachment from the body 111 of the outlet or plug.
• a toothed crown 127 is provided inside the nut 116, close to its opening, and a stop tooth 128 that is intended to interact with the toothing 127 is provided on the outer face of the longer tongue 122.
• the stop tooth 128 is so as to make possible the unidirectional rotation from left to right of the nut 116 for its screwing onto the threaded collar 111' of the body 111 and, on the other hand, to prevent the opposite rotation of the nut for its unscrewing.
• the nut 116 can be screwed to the bottom for the clamping of the cable through the grip element, but cannot be loosened and be unscrewed uncontrollably due to an unintentional release of the cable.
• a ring seal 129 through which the said cable passes and which guarantees the sealing around same below the grip element, may be mounted inside the body without being affected by the said clamping and unclamping means.
• the body 211 of an electrical outlet or plug is shown only partially in its end part, in which it has a collar 211' with an outer threaded section 215 onto which a locking nut 216 is screwed.
• a seat 217 which has conical grooves 217' in the longitudinal direction, which are narrowed towards the inside of the body, is provided in the body 211.
• a grip element 218 is mounted between the collar 211' and the nut 216 for clamping the electrical cable, which is passed through there centrally and which extends through a seal 229.
• the grip element 218 has flexible jaws 219, which come from an annular portion 220 and which have a conical portion 219' intended to be joined to the conical grooves 217' in the collar of the body.
• the annular portion 220 of the grip element 218 is also turned towards, and interacts with, an annular striking surface 221 inside the nut 216, so that the said element is pushed into the body when the nut is screwed onto the threaded section
• the grip element 218 is provided with two tongues 222 to limit
• the tongues 222 are identical, diametrically opposite, placed between two contiguous jaws, and moved outwards in relation to same. These [tongues] are intended to be inserted and to slide in corresponding indentations 224 provided on the outside of the collar 211' of the body 211, corresponding to two flattened sections 223. Each tongue 222 has two lateral locking teeth 222' while two opposing steps 224' are provided on the sides of each indentation 224, close to the free end of the collar 211'.
• the tongues 222 of the grip element 218 are inserted in the respective indentations 224 of the collar 211' so that the said element may slide axially in relation to the body.
• the lateral teeth 222' of the tongues 222 strike against the steps 224' on the sides of the indentations 224 so as to stop the element proper, thus preventing its detachment from the body 211 of the outlet or plug.
• the locking nut 216 remains joined in the axial direction to the grip element 218 and, through this [grip element], to the body 211 of the outlet or plug.
• the internal edge of the annular striking surface 221 of the nut 216 is provided for being inserted by force into a groove 226, which is present around a protuberance of the grip element lying above the annular portion of same, and this groove may be defined by a continuous collar or one with sections, as shown in the drawings.
• Hie connection then makes possible the rotation of the nut 216 in relation to the grip element 218 for screwing and unscrewing on the threaded section 215 of the collar of the body; however, the nut and grip element are kept joined to one another and, through the tongues 222, to the body of the outlet or plug.
• the outer surface of the nut 216 has a toothing or broaching 227, and the body 211, on one side of the collar 211', in the
• a stop tooth 228 ( Figures 7-9), which is intended to engage with the outer toothing or broaching 227 of the nut 216, is provided on the internal surface of the lug 228.
• the stop tooth 228' of the lug 228 is so as to make possible the unidirectional rotation (from left to right) of the nut for its screwing onto the threaded collar 211' of the body 211 and, on the other hand, to prevent the opposite rotation of the nut for its unscrewing. Therefore, the nut 216 can be screwed to the bottom for clamping the cable through the grip element, but it cannot be loosened and unscrewed in an uncontrolled manner due to an unintentional release of the cable.

Landscapes

• Details Of Connecting Devices For Male And Female Coupling (AREA)
• Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)

Priority Applications (6)

Applications Claiming Priority (4)

Publications (1)

Family

ID=26330436

Family Applications (1)

Country Status (10)

Cited By (8)

Families Citing this family (14)

Citations (4)

• 1999
  • 1999-01-28 CN CN99800110.4A patent/CN1108001C/zh not_active Expired - Fee Related
  • 1999-01-28 PL PL335756A patent/PL193194B1/pl not_active IP Right Cessation
  • 1999-01-28 AU AU27205/99A patent/AU2720599A/en not_active Abandoned
  • 1999-01-28 RU RU99123370/09A patent/RU2241283C2/ru not_active IP Right Cessation
  • 1999-01-28 CA CA002285397A patent/CA2285397C/en not_active Expired - Fee Related
  • 1999-01-28 TR TR1999/02468T patent/TR199902468T1/xx unknown
  • 1999-01-28 JP JP53995999A patent/JP3974944B2/ja not_active Expired - Fee Related
  • 1999-01-28 WO PCT/EP1999/000567 patent/WO1999040651A1/en active Application Filing
  • 1999-01-28 HU HU0003263A patent/HU229460B1/hu not_active IP Right Cessation
  • 1999-10-05 BR BRPI9904770-5B1A patent/BR9904770B1/pt not_active IP Right Cessation

Patent Citations (4)

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