FR2604221A1 - COVER OF AN IGNITION DISTRIBUTOR OF AN INTERNAL COMBUSTION ENGINE COMPRISING FIXING AND CONNECTION MEANS FOR ELECTRICAL CABLES. - Google Patents

Abstract

THE COVER INCLUDES AT LEAST ONE CYLINDRICAL HOUSING 3 TO RECEIVE THE END PART OF THE CABLE 4, A FLAT-SHAPED TERMINAL 18 OPENING ARRANGED TRANSVERSALLY WITH REGARD TO THE HOUSING 3 AND OVERLAPING THIS AND A STAPLE 8 OF CONDUCTIVE MATERIAL IN WHICH IS ENGAGED THE OPENING 18 TO ENSURE THE FIXING AND CONNECTION OF THE CABLE 4. THE STAPLE 8 HAS A SLOT 9 AND A CUTTING EDGE 10 AT ITS END. WHEN IT IS ENGAGED IN THE OPENING 18, THE CABLE 4 BEING PLACED IN THE HOUSING 3, THE CLAP 8 ENSURES THE CUTTING OF THE INSULATION OF THE CABLE 4. THE CORE 14 OF THE CABLE 4 IS INSERTED IN THE SLOT 9 OF WHICH THE WIDTH IS AT MOST EQUAL TO THE DIAMETER OF CORE 14. ELECTRICAL CONTACT BETWEEN THE CABLE AND THE CLIP IS THUS ENSURED.

Description

The invention relates to a cover of a device.

  ignition starter of an internal combustion engine comprising fixing and connection means

  the end of at least one electric current cable

  high voltage stick. The ignition distributors of internal combustion engines have a cover or head of insulating material receiving the ends of the cables bringing the high voltage electric current from the ignition coil and transmitting the pulses of

  current at each of the successive spark plugs-

  is lying. Each of these high voltage electric cables must be connected to a terminal made of conductive material

  located inside the dispenser cover.

  For this, a metal tip is generally used.

  than attached to the end of the cable, and electrically connected

  to the conductive core of the cable. The assembly is then mounted in a socket or on an olive electrically connected to the corresponding terminal arranged inside the cover of the dispenser. It is therefore

  necessary to provide for the attachment of a metal end cap

  that at the end of the cable, by an operation which is

  difficult to automate, in its industrial practice

  trielle. In addition, the retention in place of the end of the cable on the sleeve or the olive of the distributor cover is only ensured by force engagement of these parts one on the other. Such an assembly can take up play and, under the effect of vibrations, one of the cables connected to the cover of the dispenser

can come off.

  The object of the invention is therefore to propose a cover for an ignition distributor of an internal combustion engine comprising means for fixing and connecting the end of at least one cable for high voltage electric current. consisting of

  a metallic core surrounded by an insulator which allows-

  to carry out the assembly of the high voltage cable on the distributor cover, by a simple and easily automated operation and to improve the fixing

  cables on the distributor cover.

  For this purpose, the dispenser cover

  according to the invention comprises at least one cy-

  lindrique to receive the end part of the cable

  ble, a blind opening of flat shape opening on its internal face, arranged transversely with respect to the housing of the cable and intersecting it and

  a clip of conductive material whose shape

  corresponds to the shape of the opening with a slit

  over its entire thickness, in its longitudinal direction

  nale corresponding to the longitudinal direction of

  the opening, the width of which is at most equal to the diameter

  meter of the cable core and an end part in

  bevel intersected by the end of the slot

  killing a way of cutting the cable insulation in place

  in his home, when the a-

  grafe in the opening, the conductive core of the cable-

  then coming into contact with the side edges of the

slot.

  In order to clearly understand the invention,

  we will now describe, by way of nonlimited example

  with reference to the attached figures, an embodiment of a distributor cover

ignition according to the invention.

  In these figures: - Figure 1 is a bottom view of a

  ignition distributor cover according to the invention

  tion; - Figure 2 is a sectional view along 2-2 of Figure 1; - Figures 3a, 3b and 3c are views in

  perspective of staples of three different types of-

  intended to equip an ignition distributor cover according to the invention;

  - Figure 4 is a front view of the par-

  tie of a clip coming to engage in the distributor cover; - Figure 5 is a side view along 5 of Figure 4; - Figure 6 is a perspective view in section of a part of a distributor cover according to the invention showing the means for fixing a cable connected to a spark plug of the engine; - Figure 7 is a perspective view in section of a portion of an ignition distributor cover according to the invention showing the means for fixing a cable connected to the ignition coil of the engine;

  - Figure 8 is a front view of the par-

  tie of a staple engaged in the dispenser cover

  striker, similar to Figure 4, and relating to a va-

laughing achievement.

  In Figures 1 and 2, we see a dispenser cover 1 in an insulating plastic material such as a resin, produced by molding. Lid

  has two fixing lugs la and lb at its peri

  and two conduits 2a, 2b, 2c, 2d and 2e, the inlet openings of which are arranged laterally and which each receive a cable 4 making it possible to supply the distributor or collect a high voltage current on the distributor. Each of the conduits 2a to 2e comprises a housing 3 whose internal diameter is

  substantially equal to the diameter of the cable 4 corresponding

  dant. The successive cables laid in the conduits

  2a to 2e will be designated by references 4a to 4e. Cha-

  each of these cables is made up of a metallic core

  that for example copper or brass, surrounded by

  an insulator. The central cable 4c is connected to its end

  not shown, opposite the distributor, to the ignition coil of the engine on which the distributor is mounted. The other four cables 4a, 4b, 4d and 4e have their ends, not shown, located opposite the distributor, each connected to a spark plug.

engine ignition.

  A rotor 6 is mounted on the body of the distributor.

  striker (not shown), so as to rotate around

  the distributor axis and in the direction of arrow 7.

  The rotor 6 has a conductive element

  allowing to feed successively, during its ro-

  each cable connected to a spark plug from

  of the cable connected to the ignition coil. For this, each

  one of the cables 4 is electrically connected to a pad

  contact switch located under the cover

  tributor 1, i.e. on the side of its internal face

  lc. Each of the studs is formed by the part of ex-

  end of a clip 8 obtained by cutting and folding

a brass plate.

  The staples 8 can be formed as follows:

  one of the three types shown in the figures

  3a, 3b and 3c. The staples 8a and 8b shown res-

  pectively in Figures 3a and 3b allow the connection of cables connected to a spark plug and the constitution of a corresponding stud under the cover 1; the clip 8c shown in Figure 3c allows the connection of the cable 4c connected to the ignition coil and the constitution of a stud coming

  contact with the rotor 6, along its axis.

  Referring to Figures 4 and 5, we will now describe in more detail the part of a clip 8 allowing the fixing and connection of the end of a cable 4 engaged in a housing 3 of the collector 1. The clip 8-comprises, on part of

  its length, a slot 9 having a part of ex-

  end 9a of circular shape located substantially mid-length of the clip 8, the second end of the slot 9 opening onto the extreme edge 10 of the clip, opposite its part constituting the contact pad

  electric. The width d of the slot 9 is preferably

  slightly less than the diameter of the metered core

  size 14 of the cable 4. The edge 10 of the clip 8 constitutes a cutting edge, the end part 11 of the clip being machined in the form of a bevel. This part 11 is separated into two halves 11a and 11b by

slot 9.

  Referring to Figures 6 and 7, we will

  now describe the method of attachment and connection

  ment of a cable 4 in the housing 3 of the cover 1 of the distributor. A blind opening 18 is provided in the cover 1, so as to be opening onto the inner face lc of this cover. The opening 18 has a flat shape corresponding to the shape of the fastening and connection part of a clip 8, for example as visible in FIG. 4. The opening

  plate 18 is arranged transversely and perpendicular to

  in relation to the housing 3 of the cable and covered

  eg this housing whose cross section is ins-

written in the opening 18.

  To carry out fixing and connection

  of cable 4, the end of the cable is first of all

  troduit in housing 3, until it comes to a stop

260 42-2 1

  on the bottom of the housing. A clip 8 of suitable shape

  you are introduced into the corresponding opening 18 (arrow 20 in FIGS. 6 and 7), then engaged by force

  to the bottom of the opening 18. The push on the a-

  grafe 8 during its engagement causes the insulation of the cable 4 to be cut by the cutting edge 10. The parts 11a and 11b of the clip 8 pass on either side of the conductive core 14 of the cable which is so

  inserted inside the slot 9.

  As can be seen in FIG. 4, the ends 13 of the cutting edge 10, towards the inside on either side of the slot 9, are rounded so as to avoid deterioration of the conductive core 14 of the cable, at the time of its introduction into the slot 9. In the case where the width d of the slot 9 is

  smaller than the diameter of the conductive core 14, this

  it can undergo some deformation inside

  of slot 9 (Figure 4). Slot 9 crossing the a-

  grafe 8 of flat shape over its entire thickness makes two parallel branches in this staple, on the

  other of the slot 9, between which comes s

  wedge the core 14. The elasticity of the two branches of the a-

  graft and / or the deformation of the core 14 make it possible to make a very good electrical contact between the core 14 and the edges of the slot 9. this slot having a width slightly less than the diameter of

soul 14.

  We therefore achieved both a very good fixing of the cable 4 in its housing 3. by passing through the insulation, the cable by the clip and a very good electrical contact between the conductive core

cable and clip.

  At the end of introduction of the clip 8, the corresponding electrical contact pad remains protruding with respect to the inner surface lc of the cover 1 of the dispenser. In the case of the clip 8 shown in Figure 6 which is of the type 8a shown in the figure

  3a, the pad 16 is constituted by a folding of a part

  lateral tie of clip 8 having a sensitive shape-

  cylindrical. This stud 16 makes it possible to make electrical contact with the conductive part of the rotor 6 at the time of its passage, as it is visible on

Figure 1.

  In the case of the clip 8 shown in FIG. 7, which is of the type 8c shown in FIG. 3c, the stud 17 is constituted by a shaped carbon

  cylindrical attached to the end of a spring 14 itself

  even mounted and abutted in a cylindrical folding 12 made at the end of the clip 8. In FIG. 7, the carbon 17 and the spring 14 have been shown before their mounting in the cylindrical folding 12 of

  clip 8. The flat opening 18 formed in the neck

  vercle 1 has, in its part leading to the

  face lc of the distributor cover, a flourishing

  cylindrical shape to receive the

  cylindrical part 12 of the clip 8.

  As can be seen in Figure 2, the ex-

  end of the carbon 17 constituting an electrical contact pad protrudes from the part 12 of the clip and comes into contact with the upper part

rotor conductor 6.

  The end part of the rotor arm, also

  conductive, comes into contact, as we ex-

  folded above, successively with the studs 16 of the type 8a staples and with the studs 16 'of the staples

type 8b.

  In Figure 8, a varian-

  for making the fixing and connecting part

  cording of a clip 8 and the flat opening 18

  corresponding. This opening includes, in its part

  blind end tie, inside the cover 1, a narrowing 18a whose width is less than the width of the end part of the clip 8. This narrowing 18a is separated from the current part of the opening 8 by inclined surfaces 18b. The clip 8 has an end portion of reduced width, this width being however greater than the width of the narrowed portion 18a of the opening 18. In

  this reduced width portion of the clip 8,

  reads two inclined edges 21 which come at the end of

  engagement of the clip 8 in the opening 18, in abutment on the inclined surfaces 18b of the opening 18. This brings together the two branches of

  clip 8 and effective clamping of the conductive part

  trice 14 of the cable which improves contact

electric with the agraFe 8.

  The distributor cover according to ln-

  vention therefore has the advantage of making it possible to achieve

  very quickly, very easily and very effectively

  effective, fixing and connection of high voltage cables from the distributor. In particular,

  cables cannot come loose due to vibration

  tions, the clip being perfectly taken in the iso-

cable lant.

  The invention is not limited to the mode of

achievement that has been, described.

  This is how only part of the distributor cables can be fixed and connected from the

way that has been described.

  The staples may have any form whatsoever.

  read to make electrical contact pads

adapted to their use.

  The slot made in the end portion of the clip may have a width close to the diameter of the conductive core of the cable, this conductive core then being only slightly or not deformed at the time of its introduction into the slot. However, this width

  must be at most equal to the diameter of the conductive core

  for electrical contact to be ensured.

  Staples can be made of any material with good electrical conductivity

  and sufficient hardness and elasticity.

  Finally, the invention applies to any distrl-

  internal combustion engine stopper regardless of the number of high voltage cables attached and connected to the distributor.

Claims (6)

  1.- Ignition distributor cover of an internal combustion engine comprising means for fixing and connecting the end of at least one cable (4) for high voltage electric current constituted by a metallic core (14) surrounded by an insulator, characterized in that it comprises at least one cylindrical housing (3) for receiving the end part of the cable (4), a blind opening (18) of flat shape opening on its internal face   (lc), arranged transversely to the housing-   ment (3) of the cable (4) and intersecting it and a   clip (8) of conductive material, the shape of which   corresponds to the shape of the opening (18) having a slot (9) over its entire thickness, in its direction   longitudinal corresponding to the longitudinal direction   opening (18), the width of which is at most   equal to the diameter of the core (14) of the cable and a part.   bevelled end (11a, 11b) intersected by the end   mite from the slot (9) constituting a means of cutting the cable insulation (4) in place in its housing (3)   at the time of the introduction of the clip (8) into the   groove (18), the conductive core of the cable (4) then coming into contact with the lateral edges of the slot (9).   2.- Distributor cover according to the re-   vendication 1, characterized by the fact that the clip (8) comprises a part (16, 16 ′, 12, 17) constituting an elestric contact pad projecting from the interior surface (lc) of the cover (1), when the clip (8) is in place in the opening (18), inside the cover (1).   3.- Distributor cover according to one   any of claims 1 and 2, characterized by   * 11 the fact that the clip (8) is produced by cutting and folding of a metal plate.   4.- Distributor cover according to one   any of claims 1, 2 and 3, characterized   by the fact that the flat opening (18) comprises, in its blind part, inside the cover (1), a part (18a) of reduced width separated from the current part of the opening (18) by inclined edges (18b) and that the clip (8) has, in its end part, a reduced width and inclined edges (21) intended to cooperate with the inclined edges (18b)   of the opening (18), during the introduction of the   fe (8) in the opening (18) to bring one of   the other the side edges of the slot (9).   5.- Distributor cover according to one   any of claims 1 to 4, to which are related   strung a cable (4c) connecting to the ignition coil of the engine and several cables (4a, 4b, 4d, 4e) each connected to a spark plug of the engine, characterized in that the clips (8a, 8b ) corresponding to the cables connected to the spark plugs have studs (16, 16 ') constituted by a simple folding of the clip (8a, 8b) and that the clip (8c) corresponding to the cable connected to the coil ignition has a stud   (12, 17) constituted by a coal maintained by a res-   comes out (14) in a part (12) of the staple folded in cylinder shape.   6.- dispenser cover according to claim 1, characterized in that the slot   (9) of the clip (8) has a width d less than the diameter   meter of the metallic core (14) of the cable (4), this metallic core being deformed, when the the clip (8) in the opening (18>.