FR2458928A1 - - Google Patents

Abstract

A. STARTING DEVICE FOR INTERNAL COMBUSTION ENGINES. B. STARTING DEVICE CHARACTERIZED IN THAT THE CONDUCTOR 19 PASSES THROUGH A SEALING ASSEMBLY 21, 22 CONSISTING OF A RECEIVING PART 21 AND OF AN ELASTIC SEALING PART MOUNTED ON THE RECEIVING PART 21, THIS ASSEMBLY 21, 22 BEING INSERTED IN A RECESS 46, 47 OF THE POLAR CASE 2 AND HOLE OF THE BEARING COVER 7. C. THE INVENTION APPLIES IN PARTICULAR TO THE STARTING OF AUTOMOTIVE ENGINES.

Description

I.- The invention starts from a starting device for motors with

  internal combustion device comprising a starter motor whose polar housing constitutes, with a drive bearing and a bearing cover, the motor casing, and an electromagnetic switch ensuring

  the engagement of a starter gear and also the com-

  motor starter motor, and which is connected to the starter motor excitation winding through a

  conductor coming out in a sealed manner from the engine casing.

  A starting device is already known in which a rubber sealing piece is mounted in a recess on the end face of the pole shell. This parallelepipedic sealing piece is provided for this purpose with a groove running on its edge, rests by three sides in

  polar carcass recess and applies by its fourth

  my side against a disk-shaped lid with which the box is closed. The conductor leaving the polar carcass in the direction of the electromagnetic switch through the sealing piece is constituted by a conductive bar of

  rectangular cross section. The sealing piece com-

  carries a sealing flange on the edge of the orifice which

  plique on the conductor bar outside the polar carcass.

  A disadvantage of this starting device is that the sealing part, because of the rigidity of the conductive bar, can already, for a slight angular offset between the recess in the polar carcass and the switch fixed on the casing, to be pressed into this box, to be pulled out of this box, or its edge can be sheared and thus the sealing does not

can no longer be guaranteed.

  We also know a sealing part

  on a starting device, which also includes a reason-

  on its periphery, insofar as this piece of

  is housed in a slot in the bearing cover. From the round through hole for the conductor leaving the polar carcass, a slot is formed to the front face

  of the sealing part, which applies to the bottom of an

  of the frontal face of the polar carcass. The piece of

  In this case, the seal is compressed in such a way that

  The slot of this sealing piece is closed.

  In this embodiment also, a slight angular offset

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  between the recess of the polar carcass and the slot of the lid

  of shoemaking can cause the shearing of the piece of waterproof-

  by the ridges of the head of this slot or

this piece of sealing.

  The object of the invention is to remedy these drawbacks.

  for this purpose, a start-up scheme

  in that the driver passes through a set of

  seal consisting of a receiving part and a piece of

  elastically mounted on the receiving part, this assembly being inserted into a recess of the polar carcass and / or the

bearing cover.

  the starting device according to the invention defined above has the advantage over solutions

  known that a sealing assembly is disposed in a recess

  the polar carcass and the bearing cover, which consists of a relatively rigid receiving part and a

  elastic sealing piece. Thanks to the receiving part, the

  The sealing member is arranged in a fixed position on the polar carcass, while the sealing member is arranged in such a manner in the receiving part as to allow the conductor to be pulled out of the polar carcass in the direction of the electromagnetic switch. tightly without being subjected

  traction and shear forces, and that it

  by its periphery sealingly against the recesses

  polar carcass and bearing cover.

  Other advantageous forms of the device for

  defined above, are made possible by other categories of

  features of the invention. It is particularly advantageous

  that the arrangement of the sealing assembly which can be fixed makes it possible to obtain a narrowing of the dispersion band of the power characteristic of the motor of the motor.

  starter, thanks to a weaker shift of the brushes

  the angular offset of the brush holder in the cover

  Bearing ring ser-ant of collector bearing, with respect to the excitation winding in the polar carcass. In addition, this sealing assembly is suitable for automatic mounting

  economic, especially for the production of large series.

  The invention will be explained in more detail with reference to an exemplary embodiment shown in the accompanying drawings, in which:

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  FIG. 1 is a sectional view of a starting device according to the invention, FIG. 2 is a section along the line MI-II of FIG. 1, FIG. 3 is a sealing assembly seen in section according to FIG. line III-III of Figure 1, - Figure 4 shows in elevation the sealing assembly in the direction of the arrow IV in Figure 1; - Figure 5 shows the receiving part of a sealing device in side view, - - Figure 6 is a partial view in elevation, in the direction of the arrow 6 of Figure ldtun polar frame and a bearing cover of the starting device,

  but, however, without the sealing assembly.

  A starting device for combustion engines

  internal arrangement comprises a starter motor 1 with a carcass

  2. The polar carcass 2 constitutes with the level of

  6 and the bearing cover 7 arranged on the faces

  3 and 4 and fixed by tie rods 5, a motor box.

  On the polar frame 2 is arranged an electronic switch

  The magnet is constituted in the form of an engagement relay 8 and is attached to the drive bearing 6. In the drive bearing 6 is rotatable mountable, an engaging lever 9. one of its ends is coupled with the armature, not shown in more detail of the engagement relay 8. Its other fork-shaped end, is articulated to the input mechanism 10. The input mechanism 10 is movably disposed on the drive shaft 11 of the starter motor 1, and is connected

  functional with a starter gear 12 which is mounted

  It is also movable on the drive shaft 11. In addition, an armature 13 and a collector 14 are arranged on the drive shaft.

  11. On the collector 14 are pressed brushes 15 mounted elastically

  only on a brush holder 16. The brush holder 16

  is fixed in the bearing cover 7.

  In the polar carcass 2 is mounted a winding

  excitation 17 whose start winding 18 is connected to

  an uninsulated strip 19. The strip 19 constitutes the conductor

  electric motor leaving the motor housing 2, 6, 7 and connected to a contact terminal 20 of a main current contact of the engagement reed 8. Through the contact terminal 20, the winding of excitation 17 may be connected in a known manner and not shown in more detail,

  to a power source also, not shown.

  The bar 19 is guided in leaktight manner at the outlet of the engine casing 2, 6, 7 to protect the interior of this casing from moisture and dirt. It is planned for this

  effect, a sealing assembly consisting of a receiving part

  this 21 and a sealing piece 22.

  The receiving part 21 takes the form of an injected part made of insulating plastic material. It has a part

  guide 23 with side edges 24 raised. Through

  The guiding portion 23 is connected to a web portion 26 in parallel with the web portion 25.

  23. The guiding portion 23 and the covering portion

  26 and 26 connect two retaining tabs 28 and 29. These retaining tabs 28 and 29 are narrower than the parts 23 and 26. They run parallel to these, the opposite surfaces 30 and 31 of the two retaining tabs 28 and

  29 being respectively curved correspondingly.

  internal meter and outer diameter of the polar carcass 2.

  The end portions 32 and 33 of the surfaces 30 and 31 are

  braked. Thus, the insertion of the receiving part 24 on the polar carcass 2 is facilitated. Similarly, the part of

  23, at the free end of its side turned towards the

  overlap 26, is provided with an introduction ramp 34 extending to the edges 24. In addition, the guiding portion 23 and the covering portion 26 are provided with a slot

  35 and 36, these slots 35 and 36 being aligned and also including

  introduction ramps 37 and 38.

  The sealing piece 22 of elastic material such as for example rubber, has a shape close to an A. It comprises a hole 39 from which a cut 40 ends at a side of its edge 41. By tilting of the cut

  the bar 19 is inserted into the hole 39. The piece of

  sealing 32 is then pushed into the receiving part 21.

  The branches 42 and 43 of the sealing piece 22 come

  then engaged around the soul 25 to the plane of the frontier face

  27. The bar 19 extends through the slots 35 and 36 4.-

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  of the receiving part 21o A cable lug 44 fixed to the ex-

  the end of the bar 19 is threaded onto the contact terminal 20 and is firmly screwed thereto. The sealing assembly 21, 22 is

  inserted on the polar carcass 2. The retaining lug 28 is

  then elastically plique on the inner envelope of the surface

  2, while the retaining tab 29 is elastically

  on the outer surface of this polar carcass. The carcass-

  2 (FIG. 6) is provided on its front face 4 with the

  sinage of a shoulder portion 45, a recess 46.

  The sides of this recess 46 serve to fix laterally

  seems to seal 21, 22 on the polar carcass 2, on the-

  which applies the guiding part 23 of the receiving part

  21. The bearing cover 7 has a conical slot 47 adapted to

  in the shape of the sealing part 22. The lid

  7 is plugged onto the edge portion 45. The cover

  box key 7 press then with the edge of his slot 47 on

  the edge 41 of the sealing piece 22, so that the branches

  42 and 43 of the sealing piece 22 are applied to the bottom of the recess 46, the surfaces of the sealing piece contiguous to the cut-off 40 are pressed one on the other, the bar 19 is guided tightly out of the casing 2, 7

  and the bearing cover 7 is fixed against the sealing assembly

  and therefore with respect to the polar carcass 2. The edge 24 of the guide portion 23 facilitates the insertion of the cover of

  bearing 7 on the sealing assembly 21, 22. The sealing piece

  22 is furthermore, thanks to the shape of the receiving part 21, surrounded to such an extent that it can not be withdrawn or be inserted into the casing 2, 7.

  can not be sheared by the bearing cover 7.

  Finally, the receiving part 21 is also provided with a separating tab 48 (FIG. 2). It is shaped next to the slot 35 on the outer face of the guide portion

  23 and prevents the uninsulated bar 19 from being accidentally

  so short-circuited with other parts electrically

Conductors 49.

  Due to the shape of the sealing assembly 21, 22 an automatic assembly particularly economical in the case

  mass production is also made possible.

6. -

Claims (7)

REVEND I C A T I 0 NS   1.- Starter device for combustion engines   internal bustion, device comprising a starter motor   whose polar carcass constitutes, with a landing stage   and a bearing cover, the motor boltier, as well as an electromagnetic switch engaging a starter gear and also switching the starter motor and which is connected to the excitation winding of the starter motor. starter motor through a driver, outgoing   in a sealed manner of the engine casing, a starting device   characterized in that the conductor (19) passes through   a sealing assembly (21, 22) consisting of a receiving part   trice (21) and an elastic sealing piece (22) mounted on the receiving member (21), this assembly (21, 22) being inserted into a recess (46, 47) of the polar carcass (2) and /or bearing cover (7).   2.- Starting device according to claim 1 characterized in that the sealing member (22) is generally surrounded by the receiving member (21) with the exception of its edge (41) ensuring the sealing grace to which this sealing piece (22) is applied in the recess (46, 47)   of the polar carcass (2) and / or the bearing cover (7).   3.- Starting device according to any one   Claims 1 and 2, characterized in that the coin   capping (22) has an orifice (39) through which the   (19), while the receiving part is provided with at least   a recess (35, 36) in the area of the orifice (39).   4.- Starting device according to any one   Claims 1 to 3, characterized in that part of   the guide (23, 24), on which the sealing part (22) is applied on one side, of the receiving part (21) is   partially introduced into the recess (46) of the frontier face.   (4) of the polar carcass (2) and protrudes furthermore   in the bearing cover (7), the receiving part (21) com-   o. with a cover portion (26) protruding above the other side of the sealing piece (22) out of the   Polar carcass (2) and bearing cover (7).   5.- Starting device according to any one   Claims 1 to 4, characterized in that the receiving part   trice (21) is provided with retaining lugs (28, 29) by means of o -7.- 2458928   which the receiving part (21) can be plugged onto the polar carcass (2) in the vicinity of the recess (46) of this polar carcass (2).   6.- Starting device according to any one   Claims 1 to 5, characterized in that the receiving part   trice (21) is made of insulating plastic which   relative to the sealing piece (22) is hardly elastic.   7.- Starting device according to any one   Claims 1 to 6, characterized in that the receiving part   trice (21) is provided with at least one protrusion (48) extending   between two parts (19, 49) to isolate one from the other.