FR2587760A1 - STARTER FOR INTERNAL COMBUSTION ENGINE - Google Patents

Abstract

THE INVENTION CONCERNS STARTERS OF INTERNAL COMBUSTION ENGINES. IT RELATES TO A STARTER IN WHICH THE CONTROL OF AN ELECTRO-MAGNET CAUSES THE DISPLACEMENT OF A SLEEVE WHICH PLACES A PINION INTO ENGAGEMENT WITH A TOOTHED CROWN CARRIED BY THE FLYWHEEL. ACCORDING TO THE INVENTION, THE MOVEMENT OF THE ELECTRO-MAGNET IS TRANSMITTED TO THE SLEEVE BY THE INTERMEDIATE OF A LEVER 8 IN THE FORM OF A DOUBLE PLATE, ONE END OF WHICH 8B IS RETAINED BY A GUIDING BODY 11 WHICH IS ARTICULATED ON A BODY 10 SOLIDARITY OF THE ELECTRO-MAGNET CORE. IN THIS WAY, THE LEVER 8 CANNOT SEPARATE FROM THE SLEEVE IT CONTROLS. APPLICATION TO STARTERS OF MOTOR VEHICLES.

Description

The present invention relates to the starters of

  internal combustion engines of motor vehicles.

  More specifically, the invention relates to a starter of the type which comprises: a support housing, a movable pinion in translation, intended to be

  engaged with a set of teeth of the steering wheel of a combustion engine

  internally, an electromagnet for maneuvering,

  a flexible transmission lever whose extremes

  are coupled to the core of the electromagnet and to a movable member for translational movement of the pinion respectively, the lever passing through a slot formed

  in a hinge pin that can rotate in the housing

  tier, and an electric motor for rotating the pinion. The present invention relates to a starter

  of the aforementioned type enabling the transmission lever to be maintained

  in its position in a safe and reliable manner.

  The invention gives this characteristic by realizing

  a starter of the aforementioned type in which the hinge pin comprises a retainer for preventing the lever from moving away from said control member

  displacement of the pinion in translation.

  In a particular embodiment in which the control member is essentially in the form of a

  sleeve movable in translation on the shaft of the electric motor

  that and in which the transmission lever comprises two substantially Y-shaped metal blades having a fork-shaped end forming two arms intended to cooperate

  with the sleeve and to cause its translation when the elec-

  magnet is energized, the retainer according to the

  vention comprises two stop members carried by the hinge pin near the edges or end sides of the slot, on its portion facing the sleeve, the distance between the stop members being such that they

25877-60

  can come into contact with the outer edges of the sides of the forked portion of the transmission lever to

  that it can not deviate from the sleeve.

  The retenoe device comprises, as indicated hereinafter, an annular retaining and guiding member carried by the spindle in front of the slot and

  crossed by the transmission lever, two

  opposite sides of the annular guide retenoeet

constituting the stop members.

  The annular retaining and guiding member has

  preferably a flattened rectangular shape and is connected to

  dice to the hinge pin by two arms integral connection. Other features and advantages of the invention

  will be better understood by reading the description that

  Embodiments will follow, with reference to the accompanying drawings in which: Figure 1 is a side elevation in partial section of an internal combustion engine starter constructed according to the invention; Figure 2 is a perspective view of the arrows

  II of FIG. 1, showing in detail the transmission lever

  mission with two leaf springs and its hinge pin according to the invention; and Figure 3 is an exploded perspective of a part

of the device of FIG.

  Referring to Figure 1; an engine starter - A-motor vehicle internal combustion comprises a support housing 1 which houses, in a known arrangement, a

  electric motor 2 of operation and an electromagnet 3.

  In the arrangement shown, the shaft 2a of the motor 2 and the movable core 3a of the electromagnet 3 are parallel

to one another.

  The shaft 2a has a large pitch thread on which the inlet portion 4a of a freewheel coupling 4 is

  mounted so that it is mobile in rotation and in translation.

  A sleeve 5 can move in translation with the inlet portion 4a of the coupling 4. On the other side of the engine 2, this coupling is connected to a pinion 6 which can move axially in translation along a part

  smooth end of the shaft 2a of the electric motor 2.

  In particular, the pinion 6 can move in translation between a withdrawn position of rest shown in solid lines in Figure 1 and an advanced working position shown in broken lines in this figure. In this latter position, the pinion 6 can be engaged with the

  7 flywheel teeth of the internal combustion engine.

  A lever 8 double leaf spring plays the role

  of a transmission element placed between the nucleus 3a of the electri-

  3-magnet and the sleeve 5 which acts as a drive member for translational movement of the pinion 6. In known manner, the lever 2 to two leaf springs comprises two coupled metal blades having a shape substantially in Y, having a forked first end which constitutes two cooperating arms 8a

  with suitable seats 5a formed on the sides of the man-

  chon 5 and the other end 8b of the lever cooperates with a

  slot formed in the end portion of the core 3a of the elec-

3-magnet

  The lever 2 with two leaf springs passes into the slot 9a of the hinge pin 9 (FIG. 3) which can rotate between the two arms of a support 10 fixed to the

boot 1 of the starter.

  An annular retaining and guiding member 11 of flattened rectangular shape is carried by the articulation pin 9 in front of the slot 9a on the side facing the sleeve 5. The double lever 8 passes into the guiding and retaining member 11 and the two smaller side portions 11a of this member cooperate with the outer side edges of the forked portion of the double lever

  so that it can not deviate from the sleeve 5.

  The retaining and guiding member 11 is connected to the hinge pin 9 by means of two arms or two connecting parts 12. Preferably, the pin 9, the guide member 11 and the retaining portions 12 are formed in one piece, for example

of plastic material.

  In the assembled state, the double transmission lever 8 is reliably and reliably retained in position: the sleeve 5 holds it in abutment on the side of the arms 8a whereas the guide and retaining member 11 carried by the spindle 9 articulation prevents its moving away

of the sleeve.

  Of course, various modifications may be made by those skilled in the art to the devices which have just been described as non-limiting examples only.

  without departing from the scope of the invention.

Claims (4)

  1. Starter for an internal combustion engine, in particular   for a motor vehicle, of the type which comprises: - a casing (1) support, - a pinion (6) movable in translation and intended to cooperate with a set of teeth of the flywheel (7) of an internal combustion engine, an electromagnet (3) for maneuvering, a flexible transmission lever (8) whose ends (8a, 8b) are coupled to the movable core (3a) of the electromagnet (3) and to a movable member (5) for controlling the displacement of the pinion (6) in translation respectively, the lever (8) passing through a slot (9a) formed in a hinge pin (9) supported in the housing (1) so that it can turn, and - an electric motor (2) for rotating the pinion (6),   characterized in that the pin of the joint (9) com-   carries a retaining device (11, 11a) for preventing movement of the lever (8) away from the member (5)   controlling the translational movement of the pinion (6).   2. Starter according to claim 1, wherein the control member is substantially in the form of a sleeve (5) movable in translation (2a) of the electric motor (2) and wherein the transmission lever (8) comprises two blades having a substantially Y-shaped shape with a forked end forming two arms (8a) intended to be in contact with the sleeve (5) and to cause it to move in translation when the electromagnet (3) is energized, characterized in that the retainer has two stop members (11ia) carried by the hinge pin (9) near the end edges or sides of the slot (9a) on the side facing the sleeve (5), the distance being between the stop members (11a) being such that they can be   in contact with the external lateral edges of the   falling (8a) of the transmission lever (8) and preventing its away from the sleeve (5). 258? 760   Starter according to Claim 2, characterized   in that the retaining device comprises an annular member   retaining and guiding web (11) carried by the spindle (9) in front of the slit (9a) and traversed by the lever (8), two opposite side portions (11a) of the annular retaining member and of guiding (11) constituting the organs stop.   4. Starter according to claim 3, characterized in that the annular retaining and guiding member (11) has a flattened rectangular shape and is connected to the hinge pin (9) by two arms or integral parts (12). connection.