WO2014033405A1 - Starter provided with a ring gear axially connected to an elastic shock-absorbing element - Google Patents

Starter provided with a ring gear axially connected to an elastic shock-absorbing element Download PDF

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Publication number
WO2014033405A1
WO2014033405A1 PCT/FR2013/051984 FR2013051984W WO2014033405A1 WO 2014033405 A1 WO2014033405 A1 WO 2014033405A1 FR 2013051984 W FR2013051984 W FR 2013051984W WO 2014033405 A1 WO2014033405 A1 WO 2014033405A1
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WO
WIPO (PCT)
Prior art keywords
starter
ring
connecting element
ring gear
elastic
Prior art date
Application number
PCT/FR2013/051984
Other languages
French (fr)
Inventor
François Lardans
José MATEUS
Thierry Paltrie
Original Assignee
Valeo Equipements Electriques Moteur
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Equipements Electriques Moteur filed Critical Valeo Equipements Electriques Moteur
Priority to EP13766592.3A priority Critical patent/EP2890889B1/en
Publication of WO2014033405A1 publication Critical patent/WO2014033405A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
    • F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
    • F02N15/043—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the gearing including a speed reducer
    • F02N15/046—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the gearing including a speed reducer of the planetary type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F02N15/006—Assembling or mounting of starting devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
    • F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
    • F02N15/06—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement
    • F02N15/062—Starter drives
    • F02N15/063—Starter drives with resilient shock absorbers

Definitions

  • the invention relates to a starter provided with a ring gear axially connected to a shock absorbing device.
  • the invention finds a particularly advantageous, but not exclusive, application with vehicles equipped with the function of stopping and restarting the engine (so-called "stop and start” function) according to which the engine of the vehicle is stopped due to traffic conditions (especially during a stop at a red light) and then restarted to save fuel.
  • a combustion engine also called an internal combustion engine, in particular a motor vehicle
  • a rotating electrical machine in the form of a starter capable of transmitting rotational energy from the starter to a crankshaft. of the engine by means of a driving ring.
  • the starter comprises an electric motor, a contactor, a speed reducer, a housing, a launcher having a control lever, an internal shaft to the electric motor and an output shaft.
  • the electric motor is composed of an inductor stator and an induced rotor mounted coaxially, the stator surrounding the rotor, which is rotatably mounted about an axis within a cylinder head.
  • the latter is integral with the starter metal housing intended to be fixed on a fixed part of the motor vehicle.
  • the rotor is rotatably mounted around the internal shaft of the electric motor.
  • a sun gear is attached to one end of the shaft.
  • the speed reducer is an epicyclic gear train comprising a satellite carrier carrying satellites meshing on the one hand with a ring gear and the output shaft, and on the other hand with the sun gear fixed to the end of the internal shaft of the electric motor. At one end of the output shaft is fixed a drive pinion.
  • the electromagnetic contactor comprises an excitation coil, a movable core and a fixed core.
  • the mobile core is connected to the launcher control lever.
  • the ring positioned inside the housing suffers shocks caused by the over-couples produced during the starting of the engine.
  • the crown is equipped with damping pads.
  • such a ring is made of a plastic material, the elastomer pads, santoprene type, and extending radially relative to said ring being overmolded thereon.
  • This ring is held in the starter housing:
  • the object of the invention is to remedy these drawbacks.
  • the invention relates to an electric starter for an internal combustion engine comprising a housing, an electric motor comprising an internal shaft movable in rotation relative to the housing along a longitudinal axis, an output shaft driven by the internal shaft. and a reducing assembly which rotatably couples the inner shaft and the output shaft, said gear unit having a ring gear fixed to the housing in an elastic connection.
  • the elastic connection between the ring gear and the casing comprises an elastic element axially remote from the ring gear, and a rotational connecting element mounted axially between the ring gear and the elastic element, the ring gear being carried by the casing through the gearbox. connecting element, said elastic element being able to absorb a torque shock transmitted to the ring.
  • the invention thus makes it possible to produce the ring gear in a material having different strength properties of the elastic element and connection.
  • the ring gear can be made of steel while the elastic element and the connecting element also called intermediate element are made of plastic.
  • This structural decomposition makes it possible to obtain, on the one hand, a ring gear with physical properties that make it possible to withstand shocks without causing breakage of the toothing, and on the other hand an elastic element with physical deformation properties that allow the shock absorption to be absorbed.
  • the connecting element makes it possible to position the elastic element axially relative to the ring gear which limits the radial volume of the starter.
  • the invention can be implemented according to the advantageous embodiments described below, which can be considered individually or in any operating combination.
  • the connecting element is in a rigid material having mechanical properties necessary to link in rotation the crown and the elastic element, in particular without deforming.
  • a connecting piece makes it possible to adapt the ring to the elastic element.
  • the elastic connection between the ring gear and the housing comprises a first rotational connection means mounted axially between the ring gear and the connecting element, and a second rotational connection means mounted axially between the connecting element and the elastic element. While different starters may comprise toothed rings of variable size, this embodiment allows for the second connecting means so as to use a standardized elastic element regardless of the size of the starter ring gear.
  • the ring comprises at least one pin, radially projecting from the ring, adapted to cooperate with the connecting element.
  • the cooperation of the tenon with the connecting element makes it possible to link in rotation the crown and the connecting element.
  • the ring comprising at least two tenons
  • the first connecting means comprises a rim coming from material with the connecting element and extending axially in the direction of the crown, the rim being able to fit into a space between two tenons of the crown.
  • the cooperation of the flange with the tenons makes it possible to bind in rotation the crown and the connecting element.
  • the flange can be easily obtained by folding a metal connecting element.
  • each post is of substantially parallelepipedal shape and has a chamfered face adapted to cooperate with another chamfered face of the connecting element.
  • the chamfered faces guide the assembly operation of the crown with the connecting element.
  • the connecting element comprises a portion overmolded on the tenon of the crown.
  • the overmolding provides a minimum play in rotation between the connecting element and the crown.
  • the second connecting means comprises at least one rod made of material with the connecting element and extending axially in the direction of the elastic element, the rod being able to cooperate with the element elastic. The rod makes it possible to link the connecting element in rotation with the elastic element.
  • the elastic element is formed by a plurality of studs carried by the rod, the studs being spaced circumferentially between them.
  • the pads allow the elastic element to deform to absorb the torque shocks of the crown.
  • a plurality of studs makes it possible to substantially vary the deformation resistance by replacing a portion of the pads.
  • the housing has an inner wall provided with tenons adapted to be inserted in a space between two consecutive pads.
  • the tenons of the casing make it possible to fix the studs to a fixed structure.
  • the elastic element is of semicircular shape and has on its outer periphery grooves adapted to cooperate with the housing lugs.
  • the tenons of the housing allow to fix the elastic element to the fixed structure of the housing.
  • the ring gear is made of a metallic material.
  • the crown can thus withstand the forces applied during successive uses of the starter.
  • the connecting element is made of a plastic material, in particular thermoplastic rigid.
  • the connecting element has the mechanical properties necessary to rotate the crown and the elastic element in rotation.
  • the connecting element may be made of a metallic material.
  • the elastic element is made of a plastic material, in particular thermoplastic elastomer.
  • the plastic element thus has deformation properties necessary for absorbing shocks from the crown.
  • the elastic element and the connecting element are manufactured by overmolding and in that the connecting element is mounted mechanically on the crown.
  • Such an embodiment of manufacturing the element elastic and the connecting element allows a better hold between it, a decrease in the risk of a mounting problem between them.
  • FIGS. 1 to 9 The invention is explained below according to its preferred embodiments, in no way limiting with reference to FIGS. 1 to 9 in which:
  • Figure 1 shows an axial sectional view of a starter according to the invention
  • Figure 2 is a perspective view of a ring gear of a starter according to one embodiment of the invention
  • Figure 3 shows a perspective view of an elastic member according to a first embodiment of the invention
  • Figure 4 shows a perspective view of a starter link member according to the first embodiment of the invention
  • Figure 5 shows a perspective view of a connecting element connecting a ring gear and a resilient member of a starter according to the first embodiment of the invention
  • Figure 6 is an exploded perspective view from below of a connecting element connecting a ring gear and a resilient member of a starter according to a second embodiment of the invention
  • Figure 7 shows an exploded perspective view in a view from above of a connecting element connecting a ring gear and a resilient member of a starter according to the second embodiment of the invention
  • Figure 8 is an exploded perspective view in a bottom view of a connecting element connecting a ring gear and a resilient member of a starter according to a third embodiment of the invention
  • Figure 9 is an exploded perspective view in a view from above of a connecting element connecting a ring gear and a resilient member of a starter according to the third embodiment of the invention.
  • the heat engine starter 10 is similar to the starter described in WO 2005/054664, so that elements identical or similar to those of FIG. 1 of this document WO 2005/054664, to which the This application will be referenced for further details, will be assigned the same reference signs.
  • the starter comprises an output shaft 43, a launcher 30 mounted on the shaft 43 and an electric motor 1 1 composed of an inductor stator 12 and an induced rotor 13 mounted coaxially, the stator 12 surrounding the rotor 13 , which is rotatably mounted about an axis 14 inside a cylinder head 15.
  • Said cylinder head is integral with a starter metal casing 16 intended to be fixed on a fixed part of the motor vehicle.
  • the casing 16 is here made of moldable material, for example based on aluminum.
  • the stator 12 comprises a plurality of inductor permanent magnets carried by the inner periphery of the cylinder head 15.
  • the stator 12 comprises an inductor coil 17 comprising two pairs of windings 18, which are wound around each other. a polar mass 19 integral with the cylinder head 15.
  • the polar masses 19 are fixed by means of screws 20 to the cylinder head 15, here metallic, as described in the document FR-A-2 61 1 096.
  • Each winding 18 is composed a continuous conductor wound around the polar mass 19 in the direction of its thickness so as to form concentric contiguous turns of increasing diameter as best seen in Figures 2 to 5 of EP A 749 194.
  • each winding 18 is radial with respect to the axis 14 of the rotor 13, which constitutes the axis of rotation of the electric motor 1 1 driving an internal shaft 24.
  • the rotor 13 comprises a bundle of plates provided with grooves for mounting electrical conductors 21 in the form of pins. These conductors 21 are interconnected to form a rotor winding in connection with conductive blades 22 belonging to a collector 23 with an electrically insulating body integral with the inner shaft 24 of the electric motor 11.
  • the winding is in continuous wire.
  • the brushes 25 rub on the collector slats 22 of the manifold 23 to supply the rotor winding.
  • the brushes 25 belong to a brush holder 26 equipped with guiding cages and receiving brushes, which are biased towards the slats 22 by means of the springs 27.
  • the brush holder 26 is integral with a metal rear bearing 28 having in the central part a housing for mounting a needle bearing 29.
  • the bearing 28 serves for rotational mounting of the rear end of the inner shaft 24 of the electric motor 1 January.
  • the axis of this internal shaft 24 is coincident with the axis 14 of the rotor 13, and with the axis of the output shaft 43 of the starter constituting the shaft of the launcher 30.
  • the rear bearing 28 serves as the centering device the rear end of the cylinder head 15, and is connected by tie rods 31 to the housing 16 of the starter 10.
  • Two threaded holes (not referenced) are formed in the housing 16 for screwing the tie rods.
  • the tie rods 31 are located outside the cylinder head 15. Here a small clearance exists between the tie rods and the outer periphery of the cylinder-shaped cylinder head 15.
  • the metal cylinder head is interposed between the casing 16 and the metal rear bearing 28.
  • the casing 16 of the starter thus comprises the bearing 28, the cylinder head 15. This casing 16 is intended to be connected to the mass of the motor vehicle via its body.
  • the starter 10 also comprises an electromagnetic contactor 32 extending parallel to the electric motor 1 1 being implanted radially above it.
  • the contactor 32 has a metal tank 33 carried by the housing 16, and equipped with an excitation coil B provided with at least one winding.
  • the tank 33 is closed at the rear by a cover 34 made of electrically insulating material.
  • the cover 34 is fixed by folding the material of the free end of the tank 33. A shoulder of the tank 33 makes it possible to ensure the axial setting of a fixed core. 35, which is fixed axially in the other direction by the cap 34 carrying terminals 36, 37 of power supply.
  • the terminals 36, 37 are shaped to each form a fixed contact 38 inside the cover 34.
  • One of the terminals 36 is intended to be connected to the positive terminal of the battery, the other 37 is connected by the intermediate of a cable 39 at the input of the inductor winding 17 of the stator and brushes 25 of positive polarity.
  • a mobile core 40 is attracted by magnetic attraction towards the fixed core 35, firstly, to act after catching a game on a rod (not referenced) bearing a movable contact (not referenced) to cause the closing of the contacts of the contactor 32 and supply the electric motor of the starter, and, secondly, actuate a lever 41 for controlling the launcher 30.
  • the output shaft 43 is rotatably mounted in a bearing 42 at the front of the casing 16.
  • This bearing 42 is constituted by way of example by a needle bearing or by a plain bearing.
  • This shaft 43 carries at the front a stop 53 adjacent to the bearing 42 to limit the movement of the launcher 30.
  • the rear end of the shaft 43 is configured to be integral in rotation with a plate of a planet carrier 47 , for example by crimping, this planet carrier 47 belonging to an epicyclic gear train constituting the speed reducer 45 gear.
  • This planet carrier 47 carries satellites 47.1 meshing on the one hand with a ring 46 (described in more detail below) and with a solar pinion 49 integral in rotation with the front end of the internal shaft 24 of the electric motor. .
  • the gearbox 45 is of the type described in the document FR 2 787 833 to which this document will refer, the latter showing the mounting of the front end of the internal shaft 24 of the electric motor 1 1 in the rear end. of the output shaft 43 having a blind hole in which is housed the front end of the inner shaft 24 with the interposition of a plain bearing and a ball.
  • the satellites 47.1 are therefore mounted in rotation each around an axis. These axes extend between two plates of transverse orientation relative to the axis of the shaft 43 being carried by these plates, one of which is thicker than the other and is here fixed by crimping to the rear end of the shaft 43.
  • the planet carrier 47 comprises a single plate fixed to the rear end of the shaft 43 and carrying the axes.
  • the launcher 30 is slidably mounted on the output shaft 43, and comprises a drive gear 50, a driver 51 configured to be actuated by the control lever 41 pivoting, and a free wheel 52 with rollers interposed axially between the 51 and the pinion 50.
  • the teeth of the pinion 50 belong to a sleeve extended at the rear to form the cylindrical outer race of the free wheel 52 to rollers.
  • the driver 51 is axially extended at the front by a bushing configured internally to form the profiled outer track of the freewheel 52 to rollers and house the springs acting in known manner on the rollers.
  • the driver 51 comprises a sleeve integral with the front of a flange of transverse orientation relative to the axis of the shaft 43.
  • This flange is integral at its outer periphery with the sleeve of axial orientation by relative to the axis of the shaft 43 for forming a roller receiving cage closed at the front by washers.
  • the driver 51 carries a washer (not referenced) defining with the flange of the driver 51 a groove for receiving the fingers of the inner end of the lever 41 in the form of a fork.
  • the upper end of the lever 41 is mounted in known manner to articulation on a rod (not referenced in Figure 1) elastically connected to the movable core 40 via a spring housed in the movable core 40.
  • the lever 41 is mounted in articulation on the movable core 40 and the spring surrounds the sleeve of the driver by bearing on the flange of the coach as described for example in DE 28 22 165.
  • the sleeve of the driver 51 is internally provided with helical splines (not referenced) in complementary engagement with external helical teeth carried by the output shaft 43 in the vicinity of its rear end here cylindrical and moreover large diameter.
  • the launcher 30 is thus animated by a helical movement when it is moved by the lever 41 in the direction of the stop 53 to come, via its pinion 50, in engagement with the drive ring, called the crown of starting (not shown), a heat engine also called internal combustion engine.
  • the freewheel device 52 can be replaced by a conical clutch coupling device, of the type described in document FR-A- 2,772,433 or a multi-disk clutch.
  • the launcher 30 variant is implanted partly outside the housing 16 at the front thereof. More precisely, the pinion 50 of the launcher 30, instead of being implanted in the casing 16 (see FIG. 1), can be implanted outside the casing 16, as can be seen, for example, in the document FR A 2,745,855 to which this document will be referred to.
  • the control lever 41 is coupled, here elastically in a variant rigidly in the aforementioned manner, by its upper end to the movable core 40 of the contactor 32, and comprises in its middle part a pivot axis 54, which according to a characteristic is distinct, the toothed gear gear reducer ring 46 due to the structure of assembly 57 described above.
  • the lever 41 is in a molded part, preferably made of rigid thermoplastic material to reduce noise, preferably reinforced by fibers.
  • the mounting of the pivot axis 54 is for example made using a support piece or in the housing 16 provided with projections for this purpose, the pivot axis 54 being separate or integrated in the lever 41.
  • a sealing pad 158 of elastomer to absorb dimensional changes.
  • This pad 158 is in contact with the contact surface of the contactor and is integral with a plastic part 155 configured to replace the tab or tabs 55 of Figure 1 of WO 2005/054664; housing housing 16 is preserved. Alternatively the pad 158 is removed and the plastic part 155 is then in contact with the contact surface of the contactor. It is also possible to use the solution described in WO 01/31 195. It all depends on the applications.
  • the ring gear 46 of the speed reducer 45 is hollow in shape and has a transversely perforated transverse wall 58 mounted on an attached hub 68 to ensure its centering.
  • the hub 68 has at its center a through opening allowing the passage of the shaft 43.
  • the wall 58 of the ring centered in the housing is used to guide the shaft 43 carrying the satellites.
  • the ring 46 internally has a toothed annular skirt 46.1 or toothing to mesh with the satellites 47.1.
  • the skirt 46.1 is axially oriented relative to the axis of the shaft 43 and therefore has a cylindrical shape.
  • the teeth 46.4 of the skirt 46.1 have an axial orientation.
  • the ring 46 externally has tenons 160 projecting radially from the ring 46.
  • the pins 160 are of substantially parallelepipedal shape and comprise a front face 161 two axial edges 163, 164, a rear edge 166 and a front edge 165. 46 is closed at the rear by a cover 200 shown in Figure 1. The inside of the ring 46 can thus be filled with lubricating grease of the satellites 47.1 and the sun gear 49.
  • At least one elastic element 90 is installed between the ring 46 and the casing 16. This elastic element 90 is able to absorb a transmitted torque shock. 46.
  • torque shock this document describes the fact that when the ring 46 rotates due to shocks undergone at the start of the motor, a force is exerted perpendicular to the radius of the ring 46 on the elastic element 90 which absorbs it by deforming itself in the same direction.
  • the elastic element 90 is kept axially distant from the ring 46 by a connecting element 80 in rotation.
  • the connecting element 80 may be fixed by a known element of screw, nail or rod type.
  • the connecting element 80 may also have a specific shape, shown in FIGS.
  • the elastic element 90 comprises a core central 120 semicircular or "C" shaped to clear a free space 91 needed to pass the lever 41.
  • the elastic element 90 comprises means of complementary cooperation with the casing 16. More specifically, the elastic element 90 comprises on its outer periphery grooves 144 able to cooperate with tenons of the casing 16 so as to link in rotation the element 90 and the casing 16. Each groove 144 is in the form of a substantially parallelepipedic recess extending radially in the material of the elastic element 90. The tenons of the casing 16 are also of parallelepipedal shape and extend radially in the grooves 144.
  • the elastic element 90 also comprises means of complementary cooperation with the connecting element 80.
  • the elastic element 90 has on its outer periphery a recess in the form of " ⁇ " with an external groove 144 connected on either side to a left radial groove 147 and a right radial groove 148.
  • one end of the right radial groove 148, opposite at the end connected to the external groove 144 is connected to a tangential groove 150.
  • the elastic element 90 comprises a shoulder between the central core 120 and its outer periphery so that the height of the outer periphery is greater than the height of the central core 120.
  • the connecting element 80 shown in FIG. 4, comprises a disc 81 forming a cover pierced centrally to ensure the passage of the means 68.
  • the connecting element 80 comprises a means of complementary cooperation with the ring 46 via a flange 82 extending axially in the direction of the ring 46 from the edge of the disc 81.
  • the flange 82 has two sides 83, 84 intended to be in contact with the axial edges 163, 164 referenced in Figure 2 of the pins 160 as shown in Figure 5 so as to link in rotation the connecting element 80 and the 46.
  • the connecting element 80 also comprises a means of complementary cooperation with the elastic element 90 by a rod 170 whose shape is adapted to the recess in the form of " ⁇ " of the elastic element 90.
  • the rod 170 engaged in the radial grooves 147, 148 and in the tangential grooves 149, 150 makes it possible to link in rotation the connecting element 80 and the elastic element 90.
  • the elastic member 90 comprises a plurality of damping pads carried by the rods 170, the pads 95 being spaced circumferentially between them.
  • the ring 46 is preferably made of a metallic material capable of supporting the frictional forces on the toothing.
  • the elastic member 90 is made of a plastic material to obtain the necessary deformation properties.
  • the shape of the connecting element 80 can be obtained by cutting and folding a metal plate. This makes it possible to achieve this connecting element easily and furthermore to utilize little material lightening the starter.
  • the connecting member 80 is made of a plastic material.
  • the plastic injection makes it possible to obtain a piece whose shape is more sought after.
  • the flange 82 of the connecting element 80 extends over the entire height of the ring 46 between the tenons 160.
  • the flange 82 has a chamfered end 85 to facilitate the insertion of the connecting element 80 between the tenons 160.
  • the tenons 160 comprise a chamfered face 161 adapted to cooperate with a chamfered face 131 of the connecting element 80.
  • the disc 81 has bores 88 which facilitate the fixing between the connecting element 80 and the elastic element 90 through the overmolding of the ring 80 by creating a mechanical connection with the damping pads 90 and the bores.
  • the flange 82 has two lugs that provide visual assistance during assembly but can also indexer in the cylinder head or the starter card.
  • the rod 170 of the connecting element 80 has a shape of "A" with two uprights 172, 173 extending axially with respect to the connecting element 80 in the direction of the elastic element 90.
  • the left pillar 172 and the right upright 173 are connected by a central reinforcement 171 of the same height as the two uprights 172, 173.
  • the connecting element 80 comprises also a plane face 176 intended to come opposite the clearance 91 of the lever 41.
  • the elastic element 90 comprises a central core 120 whose height is equal to the height of the outer periphery of the part.
  • the elastic element 90 is provided with grooves 144 adapted to cooperate with the casing 16.
  • the elastic element 90 further comprises notches 145 extending radially on the edge of the casing.
  • the complementary means of cooperation of the elastic element 90 with the connecting element 80 has a shape of "T" with a central recess 180 of substantially rectangular shape which one side extends firstly to a left tangential groove 181 and secondly a right tangential groove 182.
  • the two posts 172, 173 of the rod 170 abuts with the edges of the central recess 180 to guarantee the rotational connection of the elastic element 90 and the connecting element 80.
  • FIGS 8 and 9 show a third embodiment for which the elastic member 90 is similar to the second embodiment.
  • the connecting element 80 has a portion 191 overmolded around the ring 46. The tenons 160 of the ring 46 thus ensure the connection in rotation with a minimum clearance.
  • the rod 170 of the connecting element 80 comprises a block 186 substantially rectangular central extending axially relative to the connecting member 80 in the direction of the elastic member 90.
  • the central block 186 is provided with a recess 188 limiting the weight of the connecting member 80.
  • One side the central block 186 extends from one to the other with two arms 187.
  • the disk 81 here comprises stops 88 extending axially towards the ring which make it possible to facilitate overmoulding between the connecting element 80 and the ring 46 by penetrating during the mounting in bores of the wall 58. stops and bores help strengthen the mechanical resistance against circumferential shocks in the same way as the pins 160.
  • the different embodiments make it possible to keep the elastic element 90 axially distant from the ring 46.
  • the connecting element 80 ensures the rotational connection of the elastic element 90 and the ring 46 so that the elastic element absorbs torque shocks experienced by the crown 46.
  • the connecting element and the elastic element are mounted at the rear of the crown and form the cover 200.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The invention relates to an electric starter for an internal combustion engine comprising a housing, an electric motor comprising an inner shaft that is rotatably mobile in relation to the housing about a longitudinal axis, an output shaft driven by the inner shaft, and a reducer assembly rotatably connecting the inner shaft and the output shaft, said reducer assembly comprising a ring gear (46) fixed to the housing by means of an elastic connection. The elastic connection between the ring gear (46) and the housing comprises an elastic element (90) that is axially at a distance from the ring gear (46), and a rotatably connecting element (80) mounted axially between the ring gear (46) and the elastic element (90), the ring gear (46) being carried by the housing by means of the connection element (80), said elastic element (90) being able to absorb a coupling impact transmitted to the ring gear (46).

Description

DEMARREUR MUNI D'UNE COURONNE DENTEE RELIEE AXIALEMENT A UN ELEMENT ELASTIQUE D'ABSORPTION DE CHOCS  STARTER HAVING A TOOTHED CROWN AXIALLY CONNECTED TO AN ELASTIC SHOCK ABSORPTION ELEMENT
DOMAINE TECHNIQUE DE L'INVENTION TECHNICAL FIELD OF THE INVENTION
L'invention concerne un démarreur muni d'une couronne dentée reliée axialement à un dispositif d'absorption des chocs. L'invention trouve une application particulièrement avantageuse, mais non exclusive, avec les véhicules équipés de la fonction d'arrêt et de re-démarrage du moteur thermique (fonction dite « stop and start » en anglais) suivant laquelle le moteur thermique du véhicule est arrêté en raison des conditions de circulation (notamment lors d'un arrêt au feu rouge) et redémarré ensuite afin de faire des économies de carburant. The invention relates to a starter provided with a ring gear axially connected to a shock absorbing device. The invention finds a particularly advantageous, but not exclusive, application with vehicles equipped with the function of stopping and restarting the engine (so-called "stop and start" function) according to which the engine of the vehicle is stopped due to traffic conditions (especially during a stop at a red light) and then restarted to save fuel.
ETAT DE LA TECHNIQUE STATE OF THE ART
Afin de démarrer un moteur thermique, appelé également moteur à combustion interne, notamment d'un véhicule automobile, il est connu d'utiliser une machine électrique tournante sous la forme d'un démarreur capable de transmettre une énergie de rotation du démarreur à un vilebrequin du moteur thermique par l'intermédiaire d'une couronne d'entraînement. In order to start a combustion engine, also called an internal combustion engine, in particular a motor vehicle, it is known to use a rotating electrical machine in the form of a starter capable of transmitting rotational energy from the starter to a crankshaft. of the engine by means of a driving ring.
Le démarreur comporte un moteur électrique, un contacteur, un réducteur de vitesse, un carter, un lanceur comportant un levier de commande, un arbre interne au moteur électrique et un arbre de sortie. The starter comprises an electric motor, a contactor, a speed reducer, a housing, a launcher having a control lever, an internal shaft to the electric motor and an output shaft.
Le moteur électrique est composé d'un stator inducteur et d'un rotor induit montés de manière coaxiale, le stator entourant le rotor, lequel est monté tournant autour d'un axe à l'intérieur d'une culasse. Cette dernière est solidaire du carter métallique du démarreur destiné à être fixé sur une partie fixe du véhicule automobile. Le rotor est monté en rotation autour de l'arbre interne du moteur électrique. Un pignon solaire est fixé à une extrémité de l'arbre. The electric motor is composed of an inductor stator and an induced rotor mounted coaxially, the stator surrounding the rotor, which is rotatably mounted about an axis within a cylinder head. The latter is integral with the starter metal housing intended to be fixed on a fixed part of the motor vehicle. The rotor is rotatably mounted around the internal shaft of the electric motor. A sun gear is attached to one end of the shaft.
Selon un exemple de réalisation, le réducteur de vitesse est un train épicycloïdal comportant un porte satellite portant des satellites engrenant d'une part avec une couronne et l'arbre de sortie, et d'autre part avec le pignon solaire fixé à l'extrémité de l'arbre interne au moteur électrique. A une extrémité de l'arbre de sortie est fixé un pignon d'entraînement. According to an exemplary embodiment, the speed reducer is an epicyclic gear train comprising a satellite carrier carrying satellites meshing on the one hand with a ring gear and the output shaft, and on the other hand with the sun gear fixed to the end of the internal shaft of the electric motor. At one end of the output shaft is fixed a drive pinion.
Le contacteur électromagnétique comporte une bobine d'excitation, un noyau mobile et un noyau fixe. Le noyau mobile est relié au levier de commande du lanceur. The electromagnetic contactor comprises an excitation coil, a movable core and a fixed core. The mobile core is connected to the launcher control lever.
La couronne, positionnée à l'intérieur du carter subit des chocs provoqués par les sur-couples produits lors des démarrages du moteur thermique. Afin de ne pas endommager la structure de la couronne lors de ces démarrages, la couronne est équipée de plots amortisseurs. The ring, positioned inside the housing suffers shocks caused by the over-couples produced during the starting of the engine. In order not to damage the structure of the crown during these starts, the crown is equipped with damping pads.
Ainsi, selon un exemple de réalisation de l'art antérieur, une telle couronne est constituée d'une matière plastique, des plots en élastomère, de type santoprène, et s'étendant radialement par rapport à ladite couronne étant surmoulés sur celle-ci. Cette couronne est maintenue dans le carter du démarreur : Thus, according to an exemplary embodiment of the prior art, such a ring is made of a plastic material, the elastomer pads, santoprene type, and extending radially relative to said ring being overmolded thereon. This ring is held in the starter housing:
- radialement par ajustement et déformation du diamètre de la couronne plastique dans le diamètre intérieur du carter, - radially by adjusting and deforming the diameter of the plastic ring in the inner diameter of the casing,
- axialement avec un jeu axial entre des butées appartenant au carter et un palier intermédiaire maintenu par serrage axial de tirants, - tangentiellement avec un jeu tangentiel sur des nervures appartenant au carter du démarreur. Ce jeu tangentiel est renforcé par les plots venant se déformer sur lesdites nervures. - Axially with an axial play between stops belonging to the housing and an intermediate bearing held by axial clamping rods, - tangentially with a tangential clearance on ribs belonging to the starter housing. This tangential game is reinforced by the pads coming to deform on said ribs.
Les efforts appliqués à la couronne au cours des utilisations successives du démarreur réalisé selon cet exemple de l'art antérieur provoquent l'usure et la casse de la denture de la couronne. En effet, le matériau de la couronne et les graisses utilisés, ainsi que le positionnement de la couronne dans le démarreur ne permettent pas d'absorber convenablement les chocs subis par la couronne. En outre, le jeu axial implique un déplacement de la couronne et donc des contraintes non homogènes sur la denture. OBJET DE L'INVENTION The forces applied to the crown during successive uses of the starter made according to this example of the prior art cause wear and breakage of the toothing of the crown. Indeed, the material of the ring and the greases used, as well as the positioning of the ring in the starter do not properly absorb shocks to the crown. In addition, the axial clearance involves a displacement of the ring and therefore non-homogeneous stresses on the toothing. OBJECT OF THE INVENTION
L'invention a pour but de remédier à ces inconvénients. The object of the invention is to remedy these drawbacks.
A cet effet, l'invention concerne un démarreur électrique pour un moteur à combustion interne comportant un carter, un moteur électrique comportant un arbre interne mobile en rotation par rapport au carter selon un axe longitudinal, un arbre de sortie entraîné par l'arbre interne et un ensemble réducteur liant en rotation l'arbre interne et l'arbre de sortie, ledit ensemble réducteur comportant une couronne dentée, fixée au carter selon une liaison élastique. La liaison élastique entre la couronne et le carter comporte un élément élastique distant axialement de la couronne, et un élément de liaison en rotation monté axialement entre la couronne et l'élément élastique, la couronne étant portée par le carter par le biais de l'élément de liaison, ledit élément élastique étant apte à absorber un choc de couple transmis à la couronne. L'invention permet ainsi de réaliser la couronne dentée dans un matériau comportant des propriétés de résistance différentes de l'élément élastique et liaison. Par exemple, la couronne dentée peut être réalisée en acier alors que l'élément élastique et l'élément de liaison appelé aussi élément intermédiaire sont réalisés en plastique. Cette décomposition structurelle permet d'obtenir d'une part une couronne dentée avec des propriétés physiques permettant de résister aux chocs sans entraîner de casse de la denture et d'autre part un élément élastique avec des propriétés physique de déformation permettant l'absorption des chocs. L'élément de liaison permet de positionner l'élément élastique axialement par rapport à la couronne dentée ce qui limite le volume radial du démarreur. For this purpose, the invention relates to an electric starter for an internal combustion engine comprising a housing, an electric motor comprising an internal shaft movable in rotation relative to the housing along a longitudinal axis, an output shaft driven by the internal shaft. and a reducing assembly which rotatably couples the inner shaft and the output shaft, said gear unit having a ring gear fixed to the housing in an elastic connection. The elastic connection between the ring gear and the casing comprises an elastic element axially remote from the ring gear, and a rotational connecting element mounted axially between the ring gear and the elastic element, the ring gear being carried by the casing through the gearbox. connecting element, said elastic element being able to absorb a torque shock transmitted to the ring. The invention thus makes it possible to produce the ring gear in a material having different strength properties of the elastic element and connection. For example, the ring gear can be made of steel while the elastic element and the connecting element also called intermediate element are made of plastic. This structural decomposition makes it possible to obtain, on the one hand, a ring gear with physical properties that make it possible to withstand shocks without causing breakage of the toothing, and on the other hand an elastic element with physical deformation properties that allow the shock absorption to be absorbed. . The connecting element makes it possible to position the elastic element axially relative to the ring gear which limits the radial volume of the starter.
L'invention peut être mise en œuvre selon les modes de réalisation avantageux exposés ci-après, lesquels peuvent être considérés individuellement ou selon toute combinaison opérante. The invention can be implemented according to the advantageous embodiments described below, which can be considered individually or in any operating combination.
Avantageusement l'élément de liaison est dans une matière rigide comportant des propriétés mécaniques nécessaires à lier en rotation la couronne et l'élément élastique, en particulier sans se déformer. Une telle pièce de liaison permet d'adapter la couronne à l'élément élastique. Avantageusement, la liaison élastique entre la couronne et le carter comporte un premier moyen de liaison en rotation monté axialement entre la couronne et l'élément de liaison, et un deuxième moyen de liaison en rotation monté axialement entre l'élément de liaison et l'élément élastique. Alors que différents démarreurs peuvent comporter des couronnes dentées de taille variable, cette réalisation permet de réaliser le deuxième moyen de liaison de sorte à utiliser un élément élastique standardisé quelque soit la taille de la couronne dentée du démarreur. Advantageously, the connecting element is in a rigid material having mechanical properties necessary to link in rotation the crown and the elastic element, in particular without deforming. Such a connecting piece makes it possible to adapt the ring to the elastic element. Advantageously, the elastic connection between the ring gear and the housing comprises a first rotational connection means mounted axially between the ring gear and the connecting element, and a second rotational connection means mounted axially between the connecting element and the elastic element. While different starters may comprise toothed rings of variable size, this embodiment allows for the second connecting means so as to use a standardized elastic element regardless of the size of the starter ring gear.
Avantageusement, la couronne comporte au moins un tenon, en saillie radiale par rapport à la couronne, apte à coopérer avec l'élément de liaison. La coopération du tenon avec l'élément de liaison permet de lier en rotation la couronne et l'élément de liaison. Avantageusement, la couronne comportant au moins deux tenons, le premier moyen de liaison comprend un rebord venant de matière avec l'élément de liaison et s'étendant axialement en direction de la couronne, le rebord étant apte à s'insérer dans un espace entre deux tenons de la couronne. La coopération du rebord avec les tenons permet de lier en rotation la couronne et l'élément de liaison. De plus, le rebord peut être facilement obtenu par pliage d'un élément de liaison métallique. Advantageously, the ring comprises at least one pin, radially projecting from the ring, adapted to cooperate with the connecting element. The cooperation of the tenon with the connecting element makes it possible to link in rotation the crown and the connecting element. Advantageously, the ring comprising at least two tenons, the first connecting means comprises a rim coming from material with the connecting element and extending axially in the direction of the crown, the rim being able to fit into a space between two tenons of the crown. The cooperation of the flange with the tenons makes it possible to bind in rotation the crown and the connecting element. In addition, the flange can be easily obtained by folding a metal connecting element.
Avantageusement, chaque tenon est de forme sensiblement parallélépipédique et présente une face chanfreinée apte à coopérer avec une autre face chanfreinée de l'élément de liaison. Les faces chanfreinées permettent de guider l'opération d'assemblage de la couronne avec l'élément de liaison. Advantageously, each post is of substantially parallelepipedal shape and has a chamfered face adapted to cooperate with another chamfered face of the connecting element. The chamfered faces guide the assembly operation of the crown with the connecting element.
Avantageusement, l'élément de liaison comporte une partie surmoulée sur le tenon de la couronne. Le surmoulage permet d'obtenir un jeu en rotation minimum entre l'élément de liaison et la couronne. Avantageusement, le deuxième moyen de liaison comprend au moins une tige venant de matière avec l'élément de liaison et s'étendant axialement en direction de l'élément élastique, la tige étant apte à coopérer avec l'élément élastique. La tige permet de lier en rotation l'élément de liaison avec l'élément élastique. Advantageously, the connecting element comprises a portion overmolded on the tenon of the crown. The overmolding provides a minimum play in rotation between the connecting element and the crown. Advantageously, the second connecting means comprises at least one rod made of material with the connecting element and extending axially in the direction of the elastic element, the rod being able to cooperate with the element elastic. The rod makes it possible to link the connecting element in rotation with the elastic element.
Avantageusement, l'élément élastique est formé par une pluralité de plots portés par la tige, les plots étant espacés circonférentiellement entre eux. Les plots permettent à l'élément élastique de se déformer pour absorber les chocs de couple de la couronne. Une pluralité de plot permet de faire varier sensiblement la résistance de déformation en remplaçant une partie des plots. Advantageously, the elastic element is formed by a plurality of studs carried by the rod, the studs being spaced circumferentially between them. The pads allow the elastic element to deform to absorb the torque shocks of the crown. A plurality of studs makes it possible to substantially vary the deformation resistance by replacing a portion of the pads.
Avantageusement, le carter comporte une paroi interne munie de tenons aptes à s'insérer dans un espace entre deux plots consécutifs. Les tenons du carter permettent de fixer les plots à une structure fixe. Advantageously, the housing has an inner wall provided with tenons adapted to be inserted in a space between two consecutive pads. The tenons of the casing make it possible to fix the studs to a fixed structure.
Avantageusement, l'élément élastique est de forme semi-circulaire et comporte sur sa périphérie externe des rainures aptes à coopérer avec des tenons du carter. Les tenons du carter permettent de fixer l'élément élastique à la structure fixe du carter. Advantageously, the elastic element is of semicircular shape and has on its outer periphery grooves adapted to cooperate with the housing lugs. The tenons of the housing allow to fix the elastic element to the fixed structure of the housing.
Avantageusement, la couronne dentée est réalisée dans un matériau métallique. La couronne peut ainsi résister aux efforts appliqués au cours des utilisations successives du démarreur. Advantageously, the ring gear is made of a metallic material. The crown can thus withstand the forces applied during successive uses of the starter.
Avantageusement, l'élément de liaison est réalisé dans un matériau plastique, en particulier thermoplastique rigide. L'élément de liaison comporte les propriétés mécaniques nécessaires à lier en rotation la couronne et l'élément élastique. En variante, l'élément de liaison peut être réalisé dans un matériau métallique. Advantageously, the connecting element is made of a plastic material, in particular thermoplastic rigid. The connecting element has the mechanical properties necessary to rotate the crown and the elastic element in rotation. Alternatively, the connecting element may be made of a metallic material.
Avantageusement, l'élément élastique est réalisé dans un matériau plastique en particulier thermoplastique élastomère. L'élément plastique comporte ainsi des propriétés de déformation nécessaires à l'absorption des chocs de la couronne. Advantageously, the elastic element is made of a plastic material, in particular thermoplastic elastomer. The plastic element thus has deformation properties necessary for absorbing shocks from the crown.
Avantageusement, l'élément élastique et l'élément de liaison sont fabriqués par surmoulage et en ce que l'élément de liaison est monté mécaniquement sur la couronne. Un tel mode de réalisation de fabrication de l'élément élastique et l'élément de liaison permet une meilleure tenue entre elle, une diminution du risque d'un problème de montage entre eux. Advantageously, the elastic element and the connecting element are manufactured by overmolding and in that the connecting element is mounted mechanically on the crown. Such an embodiment of manufacturing the element elastic and the connecting element allows a better hold between it, a decrease in the risk of a mounting problem between them.
BREVE DESCRIPTION DES FIGURES BRIEF DESCRIPTION OF THE FIGURES
L'invention est exposé ci-après selon ses modes de réalisation préférés, nullement limitatif en référence aux figures 1 à 9 dans lesquelles : The invention is explained below according to its preferred embodiments, in no way limiting with reference to FIGS. 1 to 9 in which:
La Figure 1 représente une vue en coupe axiale d'un démarreur selon l'invention ; Figure 1 shows an axial sectional view of a starter according to the invention;
La Figure 2 est une vue en perspective d'une couronne dentée d'un démarreur selon un mode de réalisation de l'invention ; La Figure 3 montre une vue en perspective d'un élément élastique selon un premier mode de réalisation de l'invention ; Figure 2 is a perspective view of a ring gear of a starter according to one embodiment of the invention; Figure 3 shows a perspective view of an elastic member according to a first embodiment of the invention;
La Figure 4 représente une vue en perspective d'un élément de liaison d'un démarreur selon le premier mode de réalisation de l'invention ; Figure 4 shows a perspective view of a starter link member according to the first embodiment of the invention;
La Figure 5 montre une vue en perspective d'un élément de liaison reliant une couronne dentée et un élément élastique d'un démarreur selon le premier mode de réalisation de l'invention ; Figure 5 shows a perspective view of a connecting element connecting a ring gear and a resilient member of a starter according to the first embodiment of the invention;
La Figure 6 est une vue en perspective éclatée selon une vue de dessous d'un élément de liaison reliant une couronne dentée et un élément élastique d'un démarreur selon un deuxième mode de réalisation de l'invention ; La Figure 7 montre une vue en perspective éclatée selon une vue de dessus d'un élément de liaison reliant une couronne dentée et un élément élastique d'un démarreur selon le deuxième mode de réalisation de l'invention ; Figure 6 is an exploded perspective view from below of a connecting element connecting a ring gear and a resilient member of a starter according to a second embodiment of the invention; Figure 7 shows an exploded perspective view in a view from above of a connecting element connecting a ring gear and a resilient member of a starter according to the second embodiment of the invention;
La Figure 8 représente une vue en perspective éclatée selon une vue de dessous d'un élément de liaison reliant une couronne dentée et un élément élastique d'un démarreur selon un troisième mode de réalisation de l'invention ; et La Figure 9 est une vue en perspective éclatée selon une vue de dessus d'un élément de liaison reliant une couronne dentée et un élément élastique d'un démarreur selon le troisième mode de réalisation de l'invention. Figure 8 is an exploded perspective view in a bottom view of a connecting element connecting a ring gear and a resilient member of a starter according to a third embodiment of the invention; and Figure 9 is an exploded perspective view in a view from above of a connecting element connecting a ring gear and a resilient member of a starter according to the third embodiment of the invention.
DESCRIPTION D'UN MODE DE REALISATION PREFERENTIEL DE L'INVENTION DESCRIPTION OF A PREFERENTIAL EMBODIMENT OF THE INVENTION
Dans la description les éléments identiques, similaires ou analogues conservent la même référence d'une figure à l'autre. In the description, identical, similar or similar elements retain the same reference from one figure to another.
En référence à la Figure 1 , le démarreur 10 de moteur thermique est similaire au démarreur décrit dans le document WO 2005/054664, en sorte que les éléments identiques ou similaires à ceux de la Figure 1 de ce document WO 2005/054664, auquel la présente demande se reportera pour plus de précisions, seront affectés des mêmes signes de référence. Le démarreur comporte un arbre de sortie 43, un lanceur 30 monté sur l'arbre 43 et un moteur électrique 1 1 composé d'un stator 12 inducteur et d'un rotor 13 induit montés de manière coaxiale, le stator 12 entourant le rotor 13, lequel est monté tournant autour d'un axe 14 à l'intérieur d'une culasse 15. Ladite culasse est solidaire d'un carter 16 métallique du démarreur destiné à être fixé sur une partie fixe du véhicule automobile. Le carter 16 est ici en matière moulable, par exemple à base d'aluminium. De manière connue le stator 12 comporte une pluralité d'aimants permanents inducteurs portés par la périphérie interne de la culasse 15. En variante, le stator 12 comporte un bobinage inducteur 17 comportant deux paires d'enroulements 18, qui sont enroulés chacun autour d'une masse polaire 19 solidaire de la culasse 15. Les masses polaires 19 sont fixées à l'aide de vis 20 à la culasse 15, ici métallique, comme décrit dans le document FR-A-2 61 1 096. Chaque enroulement 18 est composé d'un conducteur continu enroulé autour de la masse polaire 19 dans le sens de son épaisseur de manière à former des spires jointives concentriques de diamètre croissant comme mieux visible dans les Figures 2 à 5 du document EP A 749 194. L'axe de chaque enroulement 18 est radial par rapport à l'axe 14 du rotor 13, lequel constitue l'axe de rotation du moteur électrique 1 1 entraînant un arbre interne 24. Le rotor 13 comporte un paquet de tôles dotées de rainures pour le montage de conducteurs 21 électriques en forme d'épingles. Ces conducteurs 21 sont reliés entre eux pour former un bobinage rotorique en liaison avec des lames 22 conductrices appartenant à un collecteur 23 à corps électriquement isolant solidaire de l'arbre interne 24 du moteur électrique 1 1 . En variante, le bobinage est à fil continu. With reference to FIG. 1, the heat engine starter 10 is similar to the starter described in WO 2005/054664, so that elements identical or similar to those of FIG. 1 of this document WO 2005/054664, to which the This application will be referenced for further details, will be assigned the same reference signs. The starter comprises an output shaft 43, a launcher 30 mounted on the shaft 43 and an electric motor 1 1 composed of an inductor stator 12 and an induced rotor 13 mounted coaxially, the stator 12 surrounding the rotor 13 , which is rotatably mounted about an axis 14 inside a cylinder head 15. Said cylinder head is integral with a starter metal casing 16 intended to be fixed on a fixed part of the motor vehicle. The casing 16 is here made of moldable material, for example based on aluminum. In known manner the stator 12 comprises a plurality of inductor permanent magnets carried by the inner periphery of the cylinder head 15. In a variant, the stator 12 comprises an inductor coil 17 comprising two pairs of windings 18, which are wound around each other. a polar mass 19 integral with the cylinder head 15. The polar masses 19 are fixed by means of screws 20 to the cylinder head 15, here metallic, as described in the document FR-A-2 61 1 096. Each winding 18 is composed a continuous conductor wound around the polar mass 19 in the direction of its thickness so as to form concentric contiguous turns of increasing diameter as best seen in Figures 2 to 5 of EP A 749 194. The axis of each winding 18 is radial with respect to the axis 14 of the rotor 13, which constitutes the axis of rotation of the electric motor 1 1 driving an internal shaft 24. The rotor 13 comprises a bundle of plates provided with grooves for mounting electrical conductors 21 in the form of pins. These conductors 21 are interconnected to form a rotor winding in connection with conductive blades 22 belonging to a collector 23 with an electrically insulating body integral with the inner shaft 24 of the electric motor 11. In a variant, the winding is in continuous wire.
Des balais 25 frottent sur les lames 22 collectrices du collecteur 23 pour alimenter le bobinage rotorique. Les balais 25 appartiennent à un porte- balais 26 équipé de cages de guidage et de réception des balais, lesquels sont sollicités en direction des lames 22 collectrices par des ressorts 27. Le porte-balais 26 est solidaire d'un palier arrière 28 métallique présentant dans la partie centrale un logement pour le montage d'un roulement à aiguilles 29. Le palier 28 sert au montage en rotation de l'extrémité arrière de l'arbre interne 24 du moteur électrique 1 1 . L'axe de cet arbre interne 24 est confondu avec l'axe 14 du rotor 13, et avec l'axe de l'arbre de sortie 43 du démarreur, constituant l'arbre du lanceur 30. Le palier 28 arrière sert de centreur à l'extrémité arrière de la culasse 15, et est relié par des tirants 31 au carter 16 du démarreur 10. Deux trous taraudés (non référencés) sont ménagés dans le carter 16 pour le vissage des tirants. Les tirants 31 sont implantés à l'extérieur de la culasse 15. Ici un faible jeu existe entre les tirants et la périphérie externe de la culasse 15 de forme tubulaire. La culasse 15 métallique est intercalée entre le carter 16 et le palier arrière métallique 28. Le carter 16 du démarreur comporte ainsi le palier 28, la culasse 15. Ce carter 16 est destiné à être relié à la masse du véhicule automobile via sa carrosserie. Brushes 25 rub on the collector slats 22 of the manifold 23 to supply the rotor winding. The brushes 25 belong to a brush holder 26 equipped with guiding cages and receiving brushes, which are biased towards the slats 22 by means of the springs 27. The brush holder 26 is integral with a metal rear bearing 28 having in the central part a housing for mounting a needle bearing 29. The bearing 28 serves for rotational mounting of the rear end of the inner shaft 24 of the electric motor 1 January. The axis of this internal shaft 24 is coincident with the axis 14 of the rotor 13, and with the axis of the output shaft 43 of the starter constituting the shaft of the launcher 30. The rear bearing 28 serves as the centering device the rear end of the cylinder head 15, and is connected by tie rods 31 to the housing 16 of the starter 10. Two threaded holes (not referenced) are formed in the housing 16 for screwing the tie rods. The tie rods 31 are located outside the cylinder head 15. Here a small clearance exists between the tie rods and the outer periphery of the cylinder-shaped cylinder head 15. The metal cylinder head is interposed between the casing 16 and the metal rear bearing 28. The casing 16 of the starter thus comprises the bearing 28, the cylinder head 15. This casing 16 is intended to be connected to the mass of the motor vehicle via its body.
Le démarreur 10 comporte également un contacteur 32 électromagnétique s'étendant parallèlement au moteur électrique 1 1 en étant implanté radialement au-dessus de celui-ci. Le contacteur 32 présente une cuve 33 métallique portée par le carter 16, et équipée d'une bobine B d'excitation dotée d'au moins un enroulement. La cuve 33 est fermée à l'arrière par un capot 34 en matière électriquement isolante. La fixation du capot 34 est réalisée par rabattement de matière de l'extrémité libre de la cuve 33. Un épaulement de la cuve 33 permet d'assurer le calage axial d'un noyau fixe 35, lequel est calé axialement dans l'autre sens par le capot 34 portant des bornes 36, 37 d'alimentation électrique. The starter 10 also comprises an electromagnetic contactor 32 extending parallel to the electric motor 1 1 being implanted radially above it. The contactor 32 has a metal tank 33 carried by the housing 16, and equipped with an excitation coil B provided with at least one winding. The tank 33 is closed at the rear by a cover 34 made of electrically insulating material. The cover 34 is fixed by folding the material of the free end of the tank 33. A shoulder of the tank 33 makes it possible to ensure the axial setting of a fixed core. 35, which is fixed axially in the other direction by the cap 34 carrying terminals 36, 37 of power supply.
Les bornes 36, 37 sont conformées pour former chacune un contact fixe 38 à l'intérieur du capot 34. L'une des bornes 36 est destinée à être reliée à la borne positive de la batterie, l'autre 37 est connectée par l'intermédiaire d'un câble 39 à l'entrée du bobinage inducteur 17 du stator et aux balais 25 de polarités positives. De manière connue lors de l'excitation de la bobine B, un noyau mobile 40 est attiré par attraction magnétique en direction du noyau fixe 35 pour, d'une part, agir après rattrapage d'un jeu sur une tige (non référencée) portant un contact mobile (non référencé) pour provoquer la fermeture des contacts du contacteur 32 et alimenter le moteur électrique du démarreur, et, d'autre part, actionner un levier 41 de commande du lanceur 30. The terminals 36, 37 are shaped to each form a fixed contact 38 inside the cover 34. One of the terminals 36 is intended to be connected to the positive terminal of the battery, the other 37 is connected by the intermediate of a cable 39 at the input of the inductor winding 17 of the stator and brushes 25 of positive polarity. In a manner known during the excitation of the coil B, a mobile core 40 is attracted by magnetic attraction towards the fixed core 35, firstly, to act after catching a game on a rod (not referenced) bearing a movable contact (not referenced) to cause the closing of the contacts of the contactor 32 and supply the electric motor of the starter, and, secondly, actuate a lever 41 for controlling the launcher 30.
L'arbre de sortie 43 est monté rotatif dans un palier 42 à l'avant du carter 16. Ce palier 42 est constitué à titre d'exemple par un roulement à aiguille ou par un palier lisse. Cet arbre 43 porte à l'avant une butée 53 adjacente au palier 42 pour limiter le déplacement du lanceur 30. L'extrémité arrière de l'arbre 43 est configurée pour être solidaire en rotation d'un plateau d'un porte-satellites 47, par exemple par sertissage, ce porte-satellites 47 appartenant à un train épicycloïdal constituant le réducteur 45 de vitesse à engrenages. Ce porte- satellites 47 porte des satellites 47.1 engrenant d'une part avec une couronne 46 (décrite plus en détail ci-dessous) et avec un pignon solaire 49 solidaire en rotation de l'extrémité avant de l'arbre interne 24 du moteur électrique. Le réducteur 45 est du type de celui décrit dans le document FR 2 787 833 auquel ce présente document se reportera, celui-ci montrant le montage de l'extrémité avant de l'arbre interne 24 du moteur électrique 1 1 dans l'extrémité arrière de l'arbre de sortie 43 doté d'un trou borgne dans lequel est logé l'extrémité avant de l'arbre interne 24 avec interposition d'un palier lisse et d'une bille. Les satellites 47.1 sont donc montés en rotation chacun autour d'un axe. Ces axes s'étendent entre deux plateaux d'orientation transversale par rapport à l'axe de l'arbre 43 en étant portés par ces plateaux, dont l'un est plus épais que l'autre et est ici fixé par sertissage à l'extrémité arrière de l'arbre 43. En variante le porte-satellites 47 comporte un seul plateau fixé à l'extrémité arrière de l'arbre 43 et portant les axes. Le lanceur 30 est monté coulissant sur l'arbre de sortie 43, et comporte un pignon d'entraînement 50, un entraîneur 51 configuré pour être actionné par le levier de commande 41 pivotant, et une roue libre 52 à galets intercalée axialement entre l'entraîneur 51 et le pignon 50. De manière connue, en l'occurrence, les dents du pignon 50 appartiennent à un manchon prolongé à l'arrière pour former la piste externe cylindrique de la roue libre 52 à galets. L'entraîneur 51 est prolongé axialement à l'avant par une douille configurée intérieurement pour former la piste externe profilée de la roue libre 52 à galets et loger les ressorts agissant de manière connue sur les galets. Plus précisément l'entraîneur 51 comporte un manchon solidaire à l'avant d'un flasque d'orientation transversale par rapport à l'axe de l'arbre 43. Ce flasque est solidaire à sa périphérie externe de la douille d'orientation axiale par rapport à l'axe de l'arbre 43 pour formation d'une cage de réception de galets fermée à l'avant par des rondelles. L'entraîneur 51 porte une rondelle (non référencée) définissant avec le flasque de l'entraîneur 51 une gorge pour la réception des doigts de l'extrémité interne du levier 41 en forme de fourchette. L'extrémité supérieure du levier 41 est montée de manière connue à articulation sur une tige (non référencée à la figure 1 ) reliée élastiquement au noyau mobile 40 via un ressort logé dans le noyau mobile 40. Bien entendu en variante le levier 41 est monté en articulation sur le noyau mobile 40 et le ressort entoure le manchon de l'entraîneur en prenant appui sur le flasque de l'entraîneur comme décrit par exemple dans le document DE 28 22 165. The output shaft 43 is rotatably mounted in a bearing 42 at the front of the casing 16. This bearing 42 is constituted by way of example by a needle bearing or by a plain bearing. This shaft 43 carries at the front a stop 53 adjacent to the bearing 42 to limit the movement of the launcher 30. The rear end of the shaft 43 is configured to be integral in rotation with a plate of a planet carrier 47 , for example by crimping, this planet carrier 47 belonging to an epicyclic gear train constituting the speed reducer 45 gear. This planet carrier 47 carries satellites 47.1 meshing on the one hand with a ring 46 (described in more detail below) and with a solar pinion 49 integral in rotation with the front end of the internal shaft 24 of the electric motor. . The gearbox 45 is of the type described in the document FR 2 787 833 to which this document will refer, the latter showing the mounting of the front end of the internal shaft 24 of the electric motor 1 1 in the rear end. of the output shaft 43 having a blind hole in which is housed the front end of the inner shaft 24 with the interposition of a plain bearing and a ball. The satellites 47.1 are therefore mounted in rotation each around an axis. These axes extend between two plates of transverse orientation relative to the axis of the shaft 43 being carried by these plates, one of which is thicker than the other and is here fixed by crimping to the rear end of the shaft 43. In a variant, the planet carrier 47 comprises a single plate fixed to the rear end of the shaft 43 and carrying the axes. The launcher 30 is slidably mounted on the output shaft 43, and comprises a drive gear 50, a driver 51 configured to be actuated by the control lever 41 pivoting, and a free wheel 52 with rollers interposed axially between the 51 and the pinion 50. In known manner, in this case, the teeth of the pinion 50 belong to a sleeve extended at the rear to form the cylindrical outer race of the free wheel 52 to rollers. The driver 51 is axially extended at the front by a bushing configured internally to form the profiled outer track of the freewheel 52 to rollers and house the springs acting in known manner on the rollers. More specifically, the driver 51 comprises a sleeve integral with the front of a flange of transverse orientation relative to the axis of the shaft 43. This flange is integral at its outer periphery with the sleeve of axial orientation by relative to the axis of the shaft 43 for forming a roller receiving cage closed at the front by washers. The driver 51 carries a washer (not referenced) defining with the flange of the driver 51 a groove for receiving the fingers of the inner end of the lever 41 in the form of a fork. The upper end of the lever 41 is mounted in known manner to articulation on a rod (not referenced in Figure 1) elastically connected to the movable core 40 via a spring housed in the movable core 40. Of course, in a variant the lever 41 is mounted in articulation on the movable core 40 and the spring surrounds the sleeve of the driver by bearing on the flange of the coach as described for example in DE 28 22 165.
De manière connue, le manchon de l'entraîneur 51 est doté intérieurement de cannelures hélicoïdales (non référencées) en prise de manière complémentaire avec des dentures hélicoïdales externes portées par l'arbre de sortie 43 au voisinage de son extrémité arrière ici cylindrique et de plus grand diamètre. Le lanceur 30 est ainsi animé d'un mouvement hélicoïdal lorsqu'il est déplacé par le levier 41 en direction de la butée 53 pour venir, par l'intermédiaire de son pignon 50, en prise avec la couronne d'entraînement, dite couronne de démarrage (non représentée), d'un moteur thermique appelé également moteur à combustion interne. In known manner, the sleeve of the driver 51 is internally provided with helical splines (not referenced) in complementary engagement with external helical teeth carried by the output shaft 43 in the vicinity of its rear end here cylindrical and moreover large diameter. The launcher 30 is thus animated by a helical movement when it is moved by the lever 41 in the direction of the stop 53 to come, via its pinion 50, in engagement with the drive ring, called the crown of starting (not shown), a heat engine also called internal combustion engine.
Il est clair que le dispositif à roue libre 52 peut être remplacé par un dispositif d'attelage à embrayage conique, du type décrit dans le document FR-A- 2 772 433 ou un embrayage à plusieurs disques. De même il est clair que le lanceur 30 en variante est implanté en partie à l'extérieur du carter 16 à l'avant de celui-ci. Plus précisément, le pignon 50 du lanceur 30, au lieu d'être implanté dans le carter 16 (cf. Figure 1 ), peut être implanté à l'extérieur du carter 16 comme visible par exemple dans le document FR A 2 745 855 auquel ce présent document se reportera. It is clear that the freewheel device 52 can be replaced by a conical clutch coupling device, of the type described in document FR-A- 2,772,433 or a multi-disk clutch. Similarly, it is clear that the launcher 30 variant is implanted partly outside the housing 16 at the front thereof. More precisely, the pinion 50 of the launcher 30, instead of being implanted in the casing 16 (see FIG. 1), can be implanted outside the casing 16, as can be seen, for example, in the document FR A 2,745,855 to which this document will be referred to.
Le levier de commande 41 est accouplé, ici élastiquement en variante rigidement de manière précitée, par son extrémité supérieure au noyau mobile 40 du contacteur 32, et comporte dans sa partie médiane un axe de pivotement 54, qui selon une caractéristique est distinct, de la couronne 46 dentée du réducteur 45 de vitesse à engrenages du fait de la structure de l'ensemble 57 décrit ci-dessus. Le levier 41 est en une pièce moulée, de préférence en matière thermoplastique rigide pour réduire les bruits, de préférence renforcée par des fibres. Le montage de l'axe de pivotement 54 est par exemple réalisé à l'aide d'une pièce d'appui ou dans le carter 16 doté de saillies à cet effet, l'axe de pivotement 54 étant distinct ou intégré au levier 41 . Dans le mode de réalisation de la figure 1 , il est prévu un plot d'étanchéité 158 en élastomère pour absorber les variations dimensionnelles. Ce plot 158 est en contact avec la face d'appui du contacteur et est solidaire d'une pièce en matière plastique 155 configurée pour remplacer la ou les languettes 55 de la figure 1 du document WO 2005/054664 ; le logement du carter 16 étant conservé. En variante le plot 158 est supprimé et la pièce en matière plastique 155 est alors en contact avec la face d'appui du contacteur. Il est également possible de faire appel à la solution décrite dans le document WO 01/31 195. Tout dépend des applications. The control lever 41 is coupled, here elastically in a variant rigidly in the aforementioned manner, by its upper end to the movable core 40 of the contactor 32, and comprises in its middle part a pivot axis 54, which according to a characteristic is distinct, the toothed gear gear reducer ring 46 due to the structure of assembly 57 described above. The lever 41 is in a molded part, preferably made of rigid thermoplastic material to reduce noise, preferably reinforced by fibers. The mounting of the pivot axis 54 is for example made using a support piece or in the housing 16 provided with projections for this purpose, the pivot axis 54 being separate or integrated in the lever 41. In the embodiment of Figure 1, there is provided a sealing pad 158 of elastomer to absorb dimensional changes. This pad 158 is in contact with the contact surface of the contactor and is integral with a plastic part 155 configured to replace the tab or tabs 55 of Figure 1 of WO 2005/054664; housing housing 16 is preserved. Alternatively the pad 158 is removed and the plastic part 155 is then in contact with the contact surface of the contactor. It is also possible to use the solution described in WO 01/31 195. It all depends on the applications.
La couronne 46 du réducteur 45 de vitesse est de forme creuse et comporte une paroi 58 transversale trouée centralement et montée sur un moyeu 68 rapporté assurant son centrage. Le moyeu 68 présente en son centre une ouverture traversant autorisant le passage de l'arbre 43. Ainsi la paroi 58, de la couronne centré dans le carter, permet de guider l'arbre 43 portant les satellites. Par ailleurs, comme visible sur la Figure 2, la couronne 46 présente intérieurement une jupe 46.1 annulaire dentée ou denture pour engrener avec les satellites 47.1 . La jupe 46.1 est d'orientation axiale par rapport à l'axe de l'arbre 43 et a donc une forme cylindrique. Les dents 46.4 de la jupe 46.1 ont une orientation axiale. La couronne 46 présente extérieurement des tenons 160 en saillie radiale par rapport à la couronne 46. Les tenons 160 sont de forme sensiblement parallélépipédique et comportent une face avant 161 deux bords axiaux 163, 164, un bord arrière 166 et un bord avant 165. La couronne 46 est fermée à l'arrière par un capot 200 représenté sur la figure 1 . L'intérieur de la couronne 46 peut être ainsi rempli de graisse de lubrification des satellites 47.1 et du pignon solaire 49. The ring gear 46 of the speed reducer 45 is hollow in shape and has a transversely perforated transverse wall 58 mounted on an attached hub 68 to ensure its centering. The hub 68 has at its center a through opening allowing the passage of the shaft 43. Thus the wall 58 of the ring centered in the housing, is used to guide the shaft 43 carrying the satellites. Moreover, as visible in FIG. 2, the ring 46 internally has a toothed annular skirt 46.1 or toothing to mesh with the satellites 47.1. The skirt 46.1 is axially oriented relative to the axis of the shaft 43 and therefore has a cylindrical shape. The teeth 46.4 of the skirt 46.1 have an axial orientation. The ring 46 externally has tenons 160 projecting radially from the ring 46. The pins 160 are of substantially parallelepipedal shape and comprise a front face 161 two axial edges 163, 164, a rear edge 166 and a front edge 165. 46 is closed at the rear by a cover 200 shown in Figure 1. The inside of the ring 46 can thus be filled with lubricating grease of the satellites 47.1 and the sun gear 49.
Afin d'absorber les chocs que subit la couronne 46 au cours des utilisations successives du démarreur 10, au moins un élément élastique 90 est installé entre la couronne 46 et le carter 16. Cet élément élastique 90 est apte à absorber un choc de couple transmis à la couronne 46. Par « choc de couple », ce document décrit le fait que lorsque la couronne 46 tourne en raison de chocs subis au démarrage du moteur, un effort est exercé perpendiculairement au rayon de la couronne 46 sur l'élément élastique 90 qui l'absorbe en se déformant selon cette même direction. L'élément élastique 90 est maintenu distant axialement de la couronne 46 par un élément de liaison 80 en rotation. L'élément de liaison 80 peut être fixé par un élément connu de type vis, clou ou tige. L'élément de liaison 80 peut également posséder une forme spécifique, représentée sur les Figures 4 à 9, en fonction de l'élément élastique 90 et de la couronne 46. Sur les Figures 4 à 9, l'élément élastique 90 comporte une âme centrale 120 de forme semi-circulaire ou en forme de « C » permettant de dégager un espace libre 91 nécessaire au passe du levier 41 . L'élément élastique 90 comporte des moyens de coopération complémentaire avec le carter 16. Plus précisément, l'élément élastique 90 comporte sur sa périphérie externe des rainures 144 aptes à coopérer avec des tenons du carter 16 de sorte à lier en rotation l'élément élastique 90 et le carter 16. Chaque rainure 144 se présente sous la forme d'un évidement sensiblement parallélépipédique s'étendant radialement dans la matière de l'élément élastique 90. Les tenons du carter 16 sont également de forme parallélépipédique et s'étendent radialement dans les rainures 144. L'élément élastique 90 comporte également des moyens de coopération complémentaire avec l'élément de liaison 80. In order to absorb the shock experienced by the ring 46 during successive uses of the starter 10, at least one elastic element 90 is installed between the ring 46 and the casing 16. This elastic element 90 is able to absorb a transmitted torque shock. 46. By "torque shock", this document describes the fact that when the ring 46 rotates due to shocks undergone at the start of the motor, a force is exerted perpendicular to the radius of the ring 46 on the elastic element 90 which absorbs it by deforming itself in the same direction. The elastic element 90 is kept axially distant from the ring 46 by a connecting element 80 in rotation. The connecting element 80 may be fixed by a known element of screw, nail or rod type. The connecting element 80 may also have a specific shape, shown in FIGS. 4 to 9, as a function of the elastic element 90 and the ring 46. In FIGS. 4 to 9, the elastic element 90 comprises a core central 120 semicircular or "C" shaped to clear a free space 91 needed to pass the lever 41. The elastic element 90 comprises means of complementary cooperation with the casing 16. More specifically, the elastic element 90 comprises on its outer periphery grooves 144 able to cooperate with tenons of the casing 16 so as to link in rotation the element 90 and the casing 16. Each groove 144 is in the form of a substantially parallelepipedic recess extending radially in the material of the elastic element 90. The tenons of the casing 16 are also of parallelepipedal shape and extend radially in the grooves 144. The elastic element 90 also comprises means of complementary cooperation with the connecting element 80.
Selon un premier mode de réalisation montré sur les Figures 3 à 5, l'élément élastique 90 comporte sur sa périphérie externe un évidement en forme de « Ω » avec une rainure externe 144 reliée de part et d'autre à une rainure radiale gauche 147 et à une rainure radiale droite 148. Une extrémité de la rainure radiale gauche 147, opposée à l'extrémité reliée à la rainure externe 144, est reliée à une rainure tangentielle 149. De même, une extrémité de la rainure radiale droite 148, opposée à l'extrémité reliée à la rainure externe 144, est reliée à une rainure tangentielle 150. According to a first embodiment shown in FIGS. 3 to 5, the elastic element 90 has on its outer periphery a recess in the form of "Ω" with an external groove 144 connected on either side to a left radial groove 147 and a right radial groove 148. One end of the left radial groove 147, opposite the end connected to the outer groove 144, is connected to a tangential groove 149. Similarly, one end of the right radial groove 148, opposite at the end connected to the external groove 144, is connected to a tangential groove 150.
Selon ce premier mode de réalisation, l'élément élastique 90 comporte un épaulement entre l'âme centrale 120 et sa périphérie externe de sorte que la hauteur de la périphérie externe soit supérieure à la haute de l'âme centrale 120. According to this first embodiment, the elastic element 90 comprises a shoulder between the central core 120 and its outer periphery so that the height of the outer periphery is greater than the height of the central core 120.
L'élément de liaison 80, représenté sur la Figure 4, comporte un disque 81 formant un capot troué centralement pour assurer le passage du moyen 68. L'élément de liaison 80 comporte un moyen de coopération complémentaire avec la couronne 46 par le biais d'un rebord 82 s'étendant axialement dans la direction de la couronne 46 depuis le bord du disque 81 . Le rebord 82 comporte deux cotés 83, 84 destinés à êtres en contact avec les bords axiaux 163, 164 référencé sur la figure 2 des tenons 160 tel que représenté sur la Figure 5 de sorte à lier en rotation l'élément de liaison 80 et la couronne 46. L'élément de liaison 80 comporte également un moyen de coopération complémentaire avec l'élément élastique 90 par une tige 170 dont la forme est adaptée à l'évidement en forme de « Ω » de l'élément élastique 90. La tige 170 engagée dans les rainures radiales 147, 148 et dans les rainures tangentielles 149, 150 permet de lier en rotation l'élément de liaison 80 et l'élément élastique 90. En variante, l'élément élastique 90 comporte une pluralité de plots amortisseurs portés par les tiges 170, les plots 95 étant espacés circonférentiellement entre eux. The connecting element 80, shown in FIG. 4, comprises a disc 81 forming a cover pierced centrally to ensure the passage of the means 68. The connecting element 80 comprises a means of complementary cooperation with the ring 46 via a flange 82 extending axially in the direction of the ring 46 from the edge of the disc 81. The flange 82 has two sides 83, 84 intended to be in contact with the axial edges 163, 164 referenced in Figure 2 of the pins 160 as shown in Figure 5 so as to link in rotation the connecting element 80 and the 46. The connecting element 80 also comprises a means of complementary cooperation with the elastic element 90 by a rod 170 whose shape is adapted to the recess in the form of "Ω" of the elastic element 90. The rod 170 engaged in the radial grooves 147, 148 and in the tangential grooves 149, 150 makes it possible to link in rotation the connecting element 80 and the elastic element 90. Alternatively, the elastic member 90 comprises a plurality of damping pads carried by the rods 170, the pads 95 being spaced circumferentially between them.
La couronne 46 est préférentiellement réalisée dans un matériau métallique apte à support les efforts de friction sur la denture. L'élément élastique 90 est réalisé dans un matériau plastique pour obtenir les propriétés de déformation nécessaires. La forme de l'élément de liaison 80 peut être obtenue par découpage et pliage d'une plaque métallique. Cela permet de réaliser cet élément de liaison facilement et en outre d'uitliser peu de matière allégeant le démarreur. The ring 46 is preferably made of a metallic material capable of supporting the frictional forces on the toothing. The elastic member 90 is made of a plastic material to obtain the necessary deformation properties. The shape of the connecting element 80 can be obtained by cutting and folding a metal plate. This makes it possible to achieve this connecting element easily and furthermore to utilize little material lightening the starter.
Dans le second mode de réalisation de l'invention, représenté sur les Figures 6 et 7, l'élément de liaison 80 est réalisé dans un matériau plastique. L'injection plastique permet d'obtenir une pièce dont la forme est plus recherchée. Le rebord 82 de l'élément de liaison 80 s'étend sur toute la hauteur de la couronne 46 entre les tenons 160. Le rebord 82 comporte une extrémité chanfreinée 85 pour facilité l'insertion de l'élément de liaison 80 entre les tenons 160. De plus, les tenons 160 comportent une face 161 chanfreinée apte à coopérer avec une face 131 chanfreinée de l'élément de liaison 80. Le disque 81 comporte des alésages 88 qui permettent de faciliter la fixation entre l'élément de liaison 80 et l'élément élastique 90 par le biais du surmoulage de la couronne 80 en créant une liaison mécanique avec les plots amortisseurs 90 et les alésages. In the second embodiment of the invention, shown in Figures 6 and 7, the connecting member 80 is made of a plastic material. The plastic injection makes it possible to obtain a piece whose shape is more sought after. The flange 82 of the connecting element 80 extends over the entire height of the ring 46 between the tenons 160. The flange 82 has a chamfered end 85 to facilitate the insertion of the connecting element 80 between the tenons 160. In addition, the tenons 160 comprise a chamfered face 161 adapted to cooperate with a chamfered face 131 of the connecting element 80. The disc 81 has bores 88 which facilitate the fixing between the connecting element 80 and the elastic element 90 through the overmolding of the ring 80 by creating a mechanical connection with the damping pads 90 and the bores.
Le rebord 82 comporte deux tenons qui permettent d'avoir une aide visuel lors de l'assemblage mais peuvent aussi permettent d'indexeur dans la culasse ou le carte du démarreur. The flange 82 has two lugs that provide visual assistance during assembly but can also indexer in the cylinder head or the starter card.
La tige 170 de l'élément de liaison 80 présente une forme de « A » avec deux montants 172, 173 s'étendant axialement par rapport à l'élément de liaison 80 dans la direction de l'élément élastique 90. Le montant gauche 172 et le montant droit 173 sont reliés par un renfort central 171 de même hauteur que les deux montants 172, 173. L'élément de liaison 80 comporte également une face plane 176 destinée à venir en regard de l'espace libre 91 de passe du levier 41 . The rod 170 of the connecting element 80 has a shape of "A" with two uprights 172, 173 extending axially with respect to the connecting element 80 in the direction of the elastic element 90. The left pillar 172 and the right upright 173 are connected by a central reinforcement 171 of the same height as the two uprights 172, 173. The connecting element 80 comprises also a plane face 176 intended to come opposite the clearance 91 of the lever 41.
L'élément élastique 90 comporte une âme centrale 120 dont la hauteur est égale à la haute de la périphérie externe de la pièce. Comme dans le premier mode de réalisation, l'élément élastique 90 est pourvu de rainures 144 aptes à coopérer avec le carter 16. A cet effet, l'élément élastique 90 comporte en outre des encoches 145 s'étendant radialement sur le bord de l'élément élastique 90, destinées à vernir en contact avec le carter 16. Le moyen de coopération complémentaire de l'élément élastique 90 avec l'élément de liaison 80 présente une forme de « T » avec un évidement central 180 de forme sensiblement rectangulaire dont un coté s'étend d'une part vers une rainure tangentielle gauche 181 et d'autre part une rainure tangentielle droite 182. Les deux montants 172, 173 de la tige 170 entre en buté avec les bords de l'évidement central 180 pour garantir la liaison en rotation de l'élément élastique 90 et de l'élément de liaison 80. The elastic element 90 comprises a central core 120 whose height is equal to the height of the outer periphery of the part. As in the first embodiment, the elastic element 90 is provided with grooves 144 adapted to cooperate with the casing 16. For this purpose, the elastic element 90 further comprises notches 145 extending radially on the edge of the casing. elastic element 90, intended to varnish in contact with the housing 16. The complementary means of cooperation of the elastic element 90 with the connecting element 80 has a shape of "T" with a central recess 180 of substantially rectangular shape which one side extends firstly to a left tangential groove 181 and secondly a right tangential groove 182. The two posts 172, 173 of the rod 170 abuts with the edges of the central recess 180 to guarantee the rotational connection of the elastic element 90 and the connecting element 80.
Les Figures 8 et 9 montrent un troisième mode de réalisation pour lequel l'élément élastique 90 est similaire au deuxième mode de réalisation. L'élément de liaison 80 comporte une partie 191 surmoulée autour de la couronne 46. Les tenons 160 de la couronne 46 assurent ainsi la liaison en rotation avec un minimum de jeu. La tige 170 de l'élément de liaison 80 comporte un bloc 186 central sensiblement rectangulaire s'étendant axialement par rapport à l'élément de liaison 80 dans la direction de l'élément élastique 90. Le bloc 186 central est muni d'un évidement 188 limitant le poids de l'élément de liaison 80. Un coté du bloc 186 central s'étend de part à d'autre avec deux bras 187. Lorsque l'élément élastique 90 coopère avec l'élément de liaison 80, les bras 187 entrent dans les rainures tangentielles 181 , 182 et le bloc 186 central est inséré dans l'évidement 180 avec un jeu minimum. Figures 8 and 9 show a third embodiment for which the elastic member 90 is similar to the second embodiment. The connecting element 80 has a portion 191 overmolded around the ring 46. The tenons 160 of the ring 46 thus ensure the connection in rotation with a minimum clearance. The rod 170 of the connecting element 80 comprises a block 186 substantially rectangular central extending axially relative to the connecting member 80 in the direction of the elastic member 90. The central block 186 is provided with a recess 188 limiting the weight of the connecting member 80. One side the central block 186 extends from one to the other with two arms 187. When the elastic element 90 cooperates with the connecting element 80, the arms 187 enter the tangential grooves 181, 182 and the central block 186 is inserted into the recess 180 with a minimum clearance.
Le disque 81 comporte ici des butées 88 s'étendant axialement en direction de la couronne qui permettent de faciliter le surmoulage entre l'élément de liaison 80 et la couronne 46 en pénétrant lors du montage dans des alésages de la paroi 58. De plus les butées et les alésages permettent de renforcer la tenue mécanique contre les chocs circonférentielle de la même façon que par le biais des tenons 160. The disk 81 here comprises stops 88 extending axially towards the ring which make it possible to facilitate overmoulding between the connecting element 80 and the ring 46 by penetrating during the mounting in bores of the wall 58. stops and bores help strengthen the mechanical resistance against circumferential shocks in the same way as the pins 160.
Les différents modes de réalisation permettent de maintenir l'élément élastique 90 distant axialement de la couronne 46. L'élément de liaison 80 assure la liaison en rotation de l'élément élastique 90 et de la couronne 46 afin que l'élément élastique absorbe des chocs de couple subits par la couronne 46. The different embodiments make it possible to keep the elastic element 90 axially distant from the ring 46. The connecting element 80 ensures the rotational connection of the elastic element 90 and the ring 46 so that the elastic element absorbs torque shocks experienced by the crown 46.
Selon un autre mode de réalisation, l'élément de liaison et l'élément élastique sont monté à l'arrière de la couronne et forment le capot 200. According to another embodiment, the connecting element and the elastic element are mounted at the rear of the crown and form the cover 200.

Claims

REVENDICATIONS
1 . Démarreur (10) électrique pour un moteur à combustion interne comportant : 1. Electric starter (10) for an internal combustion engine comprising:
- un carter (16), a housing (16),
- un moteur électrique (1 1 ) comportant un arbre interne (24) mobile en rotation par rapport au carter (16) selon un axe longitudinal (14),  an electric motor (1 1) comprising an internal shaft (24) rotatable relative to the housing (16) along a longitudinal axis (14),
- un arbre de sortie (43) entraîné par l'arbre interne (24) et  an output shaft (43) driven by the internal shaft (24) and
- un ensemble réducteur (45) liant en rotation l'arbre interne (24) et l'arbre de sortie (43), ledit ensemble réducteur (45) comportant une couronne (46) dentée, fixée au carter (16) selon une liaison élastique,  - a reducing assembly (45) rotatingly connecting the inner shaft (24) and the output shaft (43), said reduction assembly (45) having a ring gear (46) toothed, fixed to the housing (16) in a connection elastic,
caractérisé en ce que la liaison élastique entre la couronne (46) et le cartercharacterized in that the elastic connection between the ring gear (46) and the casing
(16) comporte : (16) comprises:
- un élément élastique (90) distant axialement de la couronne (46), et  an elastic element (90) axially remote from the ring (46), and
- un élément de liaison (80) en rotation monté axialement entre la couronne (46) et l'élément élastique (90), la couronne (46) étant portée par le carter (16) par le biais de l'élément de liaison (80), a rotational connecting element (80) mounted axially between the ring gear (46) and the elastic element (90), the ring gear (46) being carried by the casing (16) via the connecting element ( 80)
- ledit élément élastique (90) étant apte à absorber un choc de couple transmis à la couronne (46).  - Said elastic element (90) being adapted to absorb a torque shock transmitted to the ring (46).
2. Démarreur (10) selon la revendication 1 dans lequel l'élément de liaison, l'élément élastique et la couronne sont dans un matériau comportant des propriétés de résistance différentes. 2. Starter (10) according to claim 1 wherein the connecting element, the elastic element and the ring are in a material having different strength properties.
3. Démarreur (10) selon la revendication 2 ou 1 , caractérisé en ce que la liaison élastique entre la couronne (46) et le carter (16) comporte : 3. Starter (10) according to claim 2 or 1, characterized in that the elastic connection between the ring (46) and the housing (16) comprises:
- un premier moyen de liaison en rotation monté axialement entre la couronne (46) et l'élément de liaison (80), et  a first rotational connection means mounted axially between the ring gear (46) and the connecting element (80), and
- un deuxième moyen de liaison en rotation monté axialement entre l'élément de liaison (80) et l'élément élastique (90).  a second rotational connection means mounted axially between the connecting element (80) and the elastic element (90).
4. Démarreur (10) selon la revendication 3, caractérisé en ce que la couronne (46) comporte au moins un tenon (160), en saillie radiale par rapport à la couronne (46), apte à coopérer avec l'élément de liaison (80). 4. Starter (10) according to claim 3, characterized in that the ring (46) comprises at least one pin (160), projecting radially from the ring (46), adapted to cooperate with the connecting element (80).
5. Démarreur (10) selon la revendication 4, caractérisé en ce que, la couronne (46) comportant au moins deux tenons (160), le premier moyen de liaison comprend un rebord (82) venant de matière avec l'élément de liaison (80) et s'étendant axialement en direction de la couronne (46), le rebord (82) étant apte à s'insérer dans un espace entre deux tenons (160) de la couronne (46). 5. Starter (10) according to claim 4, characterized in that, the ring (46) having at least two pins (160), the first connecting means comprises a flange (82) integral with the connecting element. (80) and extending axially towards the ring (46), the flange (82) being adapted to be inserted in a space between two pins (160) of the ring (46).
6. Démarreur (10) selon la revendication 5, caractérisé en ce que chaque tenon (160) est de forme sensiblement parallélépipédique et présente une face (161 ) chanfreinée apte à coopérer avec une autre face (131 ) chanfreinée de l'élément de liaison (80). 6. Starter (10) according to claim 5, characterized in that each post (160) is of substantially parallelepipedal shape and has a chamfered face (161) adapted to cooperate with another face (131) chamfered of the connecting element (80).
7. Démarreur (10) selon la revendication 4, caractérisé en ce que l'élément de liaison (80) comporte une partie (191 ) surmoulée sur le tenon (160) de la couronne (46). 7. Starter (10) according to claim 4, characterized in that the connecting element (80) comprises a portion (191) overmolded on the pin (160) of the ring (46).
8. Démarreur (10) selon l'une des revendications 3 à 6, caractérisé en ce que le deuxième moyen de liaison comprend au moins une tige (170) venant de matière avec l'élément de liaison (80) et s'étendant axialement en direction de l'élément élastique (90), la tige (170) étant apte à coopérer avec l'élément élastique (90). 8. Starter (10) according to one of claims 3 to 6, characterized in that the second connecting means comprises at least one rod (170) integral with the connecting element (80) and extending axially in the direction of the elastic element (90), the rod (170) being able to cooperate with the elastic element (90).
9. Démarreur (10) selon la revendication 8, caractérisé en ce que l'élément élastique (90) est formé par une pluralité de plots (95) portés par la tige (170), les plots (95) étant espacés circonférentiellement entre eux. 9. Starter (10) according to claim 8, characterized in that the elastic element (90) is formed by a plurality of studs (95) carried by the rod (170), the studs (95) being spaced circumferentially between them .
10. Démarreur (10) selon la revendication 9, caractérisé en ce que le carter (16) comporte une paroi interne munie de tenons aptes à s'insérer dans un espace entre deux plots (95) consécutifs. 10. Starter (10) according to claim 9, characterized in that the housing (16) has an inner wall provided with tenons adapted to be inserted in a space between two pads (95) consecutive.
1 1 . Démarreur selon la revendication 8, caractérisé en ce que l'élément élastique (90) est de forme semi-circulaire et comporte sur sa périphérie externe des rainures (144) aptes à coopérer avec des tenons du carter (16). 1 1. Starter according to claim 8, characterized in that the elastic element (90) is of semicircular shape and has on its outer periphery grooves (144) adapted to cooperate with lugs of the housing (16).
12. Démarreur (10) selon l'une des revendications 1 à 1 1 , caractérisé en ce que la couronne (46) dentée est réalisée dans un matériau métallique. 12. Starter (10) according to one of claims 1 to 1 1, characterized in that the ring gear (46) is made of a metal material.
13. Démarreur (10) selon l'une des revendications 1 à 12, caractérisé en ce que l'élément de liaison (80) est réalisé dans un matériau plastique, en particulier thermo plastique rigide. 13. Starter (10) according to one of claims 1 to 12, characterized in that the connecting element (80) is made of a plastic material, in particular thermoplastic rigid.
14. Démarreur (10) selon l'une des revendications 1 à 13, caractérisé en ce que l'élément élastique (90) est réalisé dans un matériau plastique, en particulier termoplastique élastomère. 14. Starter (10) according to one of claims 1 to 13, characterized in that the elastic member (90) is made of a plastic material, in particular thermoplastic elastomer.
15. Démarreur (10) selon l'une des revendications 13 et 14 dans lequel l'élément élastique (90) et l'élément de liaison (80) sont fabriqués dans un même moule et en ce que l'élément de liaison (80) est monté mécaniquement sur la couronne (46). 15. Starter (10) according to one of claims 13 and 14 wherein the elastic element (90) and the connecting element (80) are manufactured in the same mold and in that the connecting element (80) ) is mechanically mounted on the ring gear (46).
PCT/FR2013/051984 2012-08-31 2013-08-28 Starter provided with a ring gear axially connected to an elastic shock-absorbing element WO2014033405A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13766592.3A EP2890889B1 (en) 2012-08-31 2013-08-28 Starter provided with a ring gear axially connected to an elastic shock-absorbing element

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1258155A FR2995031B1 (en) 2012-08-31 2012-08-31 STARTER HAVING A TOOTHED CROWN AXIALLY CONNECTED TO AN ELASTIC SHOCK ABSORPTION ELEMENT
FR1258155 2012-08-31

Publications (1)

Publication Number Publication Date
WO2014033405A1 true WO2014033405A1 (en) 2014-03-06

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ID=47088974

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PCT/FR2013/051984 WO2014033405A1 (en) 2012-08-31 2013-08-28 Starter provided with a ring gear axially connected to an elastic shock-absorbing element

Country Status (3)

Country Link
EP (1) EP2890889B1 (en)
FR (1) FR2995031B1 (en)
WO (1) WO2014033405A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0529456A1 (en) * 1991-08-22 1993-03-03 Nippondenso Co., Ltd. Starter
EP1347171A1 (en) * 2002-03-22 2003-09-24 Valeo Mando Electrical Systems Korea Limited Apparatus for absorbing impact of starter
EP1357287A2 (en) * 2002-04-26 2003-10-29 Denso Corporation Starting apparatus
EP1873394A1 (en) * 2006-06-27 2008-01-02 Valeo Equipements Electriques Moteur Starter device for combustion engine
EP2375056A1 (en) * 2010-03-30 2011-10-12 Robert Bosch GmbH Starter device with damping component having an hollow gear and an intermediate portion

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0529456A1 (en) * 1991-08-22 1993-03-03 Nippondenso Co., Ltd. Starter
EP1347171A1 (en) * 2002-03-22 2003-09-24 Valeo Mando Electrical Systems Korea Limited Apparatus for absorbing impact of starter
EP1357287A2 (en) * 2002-04-26 2003-10-29 Denso Corporation Starting apparatus
EP1873394A1 (en) * 2006-06-27 2008-01-02 Valeo Equipements Electriques Moteur Starter device for combustion engine
EP2375056A1 (en) * 2010-03-30 2011-10-12 Robert Bosch GmbH Starter device with damping component having an hollow gear and an intermediate portion

Also Published As

Publication number Publication date
EP2890889B1 (en) 2018-04-25
FR2995031A1 (en) 2014-03-07
FR2995031B1 (en) 2018-07-13
EP2890889A1 (en) 2015-07-08

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