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
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
  • F16H55/02—Toothed members; Worms
  • F16H55/17—Toothed wheels
• • 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
  • F02N11/00—Starting of engines by means of electric motors
• • 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
  • F02N15/022—Gearing between starting-engines and started engines; Engagement or disengagement thereof the starter comprising an intermediate clutch
  • F02N15/023—Gearing between starting-engines and started engines; Engagement or disengagement thereof the starter comprising an intermediate clutch of the overrunning 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
  • F02N15/02—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
• • 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
  • F02N15/067—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 the starter comprising an electro-magnetically actuated lever
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
  • F16H55/02—Toothed members; Worms
  • F16H55/17—Toothed wheels
  • F16H2055/176—Ring gears with inner teeth

Definitions

• the invention relates to a ring provided with an insert for speed reducer of a thermal engine starter, as well as on the corresponding speed reducer assembly.
• the invention finds a particularly advantageous, but not exclusive, application with the starters equipping vehicles equipped with the stop and restart function of the engine (function called "stop and start” in English) depending on the conditions of the engine. circulation.
• a rotating electrical machine in the form of a starter provided with a launcher capable of transmitting rotational energy of the starter to a crankshaft of the engine thermal through a starter ring.
• This launcher is mounted on a drive shaft.
• a speed reducer is mechanically and kinematically mounted between the drive shaft and the electric motor shaft of the rotating electrical machine.
• the interposition of the reducer has the advantage of using a faster electric machine and thus obtain a higher starting torque while reducing the size and weight of the machine for a given power.
• this speed reducer can be formed by a toothed wheel in the form of a pinion fixed at one end of the shaft of the electric motor of the electric machine and a ring gear fixed in rotation by friction means of the drive shaft; this ring having inner teeth meshing with the pinion.
• the electric motor shaft and the drive shaft are offset relative to each other.
• the speed reducer is formed by an epicyclic gear train comprising planet gears rotatably mounted about axes carried by a planet carrier comprising a transverse plate secured to the rear end of the planet. the drive shaft.
• These planet gears meshing with the pinion integral with the shaft of the electric motor and with the inner teeth of an annular base of a ring gear stationarily rotated relative to the starter housing.
• the electric motor shaft and the drive shaft are coaxial.
• the launcher comprises a pinion provided with teeth configured to mesh with teeth of the rigidly or resiliently fixed starting ring gear of the crankshaft of the engine to be started.
• This launcher can undergo significant mechanical shocks during operation of the starter, especially during the launch of the engine.
• significant mechanical shocks For example, if the injection system of the vehicle has random malfunctions during start-up of the engine, there may be premature combustion cycle explosions, generally referred to in English as 'back fire', which are liable to generate significant shocks. These shocks are transmitted to the speed reducer, which can, with the wear, cause the destruction of the teeth of the crown of the speed reducer.
• crowns of speed reducers generally made in a plastic material with crowns made entirely of metal.
• crowns can increase the life of the teeth, they increase the weight of the starter and its noise level in operation.
• the object of the invention is to remedy these drawbacks effectively by proposing a ring gear of a motor vehicle engine thermal motor starter gear comprising an annular insert forming crown teeth, an annular base surrounding the insert, wherein the outer shape of the insert matches the inner shape of the base, and that the insert is mounted in the base, the base having inner teeth facing inwardly of the base, and the insert having inner teeth facing inwardly of the insert and outer teeth facing outwardly of the insert, the outer teeth of the the insert being intended to cooperate with spaces separating the internal teeth of the base, so that the inner teeth of the insert substantially cover the inner teeth of the base.
• annular base of substantially axial orientation in which is positioned an annular insert insert forming teeth of the crown.
• the insert insert which may be made of a material stronger than the base of the crown, makes it possible to stiffen the teeth of the crown to increase their life, while the annular base makes it possible to retain properties of shock absorption to reduce the noise of the starter.
• the invention thus makes it possible to combine the advantages of the materials of the elements forming the crown.
• the fact that the base has internal teeth oriented towards the inside of the base, and that the insert has internal teeth oriented towards the inside of the insert and external teeth oriented towards the outside of the base. insert, the external teeth of the insert being intended to cooperate with spaces separating the internal teeth of the base, so that the internal teeth of the insert substantially cover the inner teeth of the base, can allow reuse of one part the crown of the prior art.
• the insert is in a material having a better resistance to sudden than that of the base.
• the material of the base has a lower density than that of the insert. This reduces the weight of the starter.
• the annular base is made of a plastic material and the insert is made of a metal-based material.
• holding means ensure at least one radial holding of the insert inside the ring. This ensures that the insert is stationary relative to the annular base without attachment means.
• the holding means comprise at least one groove formed in a transverse wall of the ring intended to receive an axial end of the insert. Indeed the groove maintains a portion of the insert to constrain the insert to move.
• the holding means comprise a plurality of grooves extending radially in at least one radial end face of the base of the ring intended to each receive a tab of corresponding shape belonging to the insert. This allows to stall on one side and the other insert to prevent it from moving. The advantage of such an arrangement avoids steps of fixing the insert on the ring.
• the tabs extend axially in an extension of a vertex of the external teeth of the insert, these tabs being foldable to fit inside the grooves in the base.
• the insert is made from a strip of material cut and stamped to form the internal and external teeth, ends of the band being folded towards each other so as to have an annular shape.
• the insert is formed from a spirally wound strip of cut material.
• the subject of the invention is also a gear reduction unit for a motor vehicle starter comprising a crown according to the invention, a planet carrier comprising satellites intended to mesh with the teeth of the crown on the one hand and on the other hand with with a sun gear, as well as a closing bearing of the crown.
• the closure bearing is provided with a groove for receiving an axial end of the insert for its radial retention.
• an indexing system provides angular positioning of the closure bearing relative to the crown.
• Figure 1 shows a longitudinal sectional view of a starter according to the invention
• Figures 2a and 2b respectively show perspective views and longitudinal section of a speed reducer according to the invention
• FIGS. 3a and 3b are perspective and front views of a crown of a speed reducer according to the invention.
• Figure 3c is a sectional view along line lllc-lllc of Figure 3b;
• Figure 3d is an enlarged view of the area 111d of Figure 3c;
• Figures 4a and 4b respectively show perspective and front views of an insert according to the invention
• Figures 5a to 5c respectively show partial perspective views of the insert, the annular base and an assembly of these elements provided with means for holding the insert on the annular base;
• Figures 6a and 6b show respectively perspective and sectional views of the closing bearing of the speed reducer according to the invention
• Figure 6c is an enlarged view of the life zone of Figure 6b;
• Figure 7 shows an alternative embodiment of the insert according to the invention devoid of external teeth.
• the starter 10 comprises a drive shaft 43, a launcher 30 mounted on the shaft 43 and an electric motor 1 1 composed of a stator 12 inductor and a rotor 13 inductors mounted coaxially.
• the stator 12 surrounds the rotor 13, which is rotatably mounted about an axis 14 inside a cylinder head 15.
• the latter is secured to a metal support 16 of the starter intended to be fixed on a fixed part of the vehicle automobile.
• the support 16 is here made of moldable material, for example based on aluminum.
• the stator 12 comprises in one embodiment a plurality of inductor permanent magnets carried by the inner periphery of the cylinder head 15.
• the stator 12 comprises a inductor winding 17 comprising two pairs of windings 18, which are each wound around a polar mass 19 integral with the cylinder head 15.
• the polar masses 19 are fixed with screws 20 to the cylinder head 15, here metallic, as described in the document FR261 1096.
• Each winding 18 is composed of 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 EP749194.
• the axis of each winding 18 is radial relative to the axis 14 of the rotor 13, which constitutes the axis of rotation of the electric motor 1 January.
• 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 the conductive blades 22 belonging to a collector 23 with an electrically insulating body integral with the shaft 24 of the electric motor 11. In a variant, the winding is in continuous wire.
• 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. These brushes are biased towards the slats 22 by springs 27.
• the brush holder 26 is integral with a metal rear bearing 29 having in the central portion a housing for mounting a needle bearing 28.
• the bearing 29 serves for rotatably mounting the rear end of the shaft 24 of the electric motor 1 1.
• the axis of this shaft 24 coincides with the axis 14 of the rotor 13, and with the axis of the drive shaft 43 constituting the shaft of the launcher 30.
• the rear bearing 29 serves as a centraliser at the end rear of the cylinder head 15, and is connected by tie rods 31 to the support 16 of the starter 10. Two threaded holes (not referenced) are formed in the support 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 head 15 substantially tubular.
• the metal cylinder head is interposed between the metal support 16 and the metal rear bearing 28.
• the starter housing thus comprises the bearing 28, the cylinder head 15 and the support 16. This casing is intended to be connected to the mass of the vehicle. automobile via its support 16.
• 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 tank 33 metal carried by the support 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 fixing of the cap 34 is achieved 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 which is wedged axially in the other direction by the cover 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 terminal 37 is connected by the intermediate cable 39 at the input of the inductor coil 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, act after catching a game on a rod (not referenced) carrying 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, operate a lever 41 of the launcher control.
• the drive shaft 43 is rotatably mounted in a bearing 42 before the support 16.
• This bearing 42 is constituted by way of example by a needle bearing alternatively 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 launcher 30 is slidably mounted on the drive 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 inner track of the free wheel 52 roller.
• 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 secured at its outer periphery of the axially oriented sleeve 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 lower end of the lever 41 fork-shaped.
• 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, said spring against tooth, housed in the movable core 40.
• the lever 41 is hingedly mounted 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 DE2822165.
• the sleeve of the driver 51 is internally provided with helical grooves in complementary engagement with external helical teeth carried by the drive shaft 43 in the vicinity of its rear end here cylindrical and larger diameter.
• the launcher 30 is thus driven 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 starter ring (not shown), of a heat engine.
• the freewheel device 52 can be replaced by a conical clutch coupling device, of the type described in document FR2772433 or a clutch provided with several friction discs, as described in document FR2978500.
• the launcher 30 variant is implanted in part outside the support 16 at the front thereof. More specifically, the pinion 50 of the launcher 30, instead of being implanted in the support can be implanted outside the support as visible for example in the document FR2745855 to which reference will be made for more details.
• the control lever 41 is coupled by its upper end to the movable core 40 of the contactor 32, and comprises in its central part a pivot axis 54.
• 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 pin 54 is for example carried out using a support piece as in DE2822165 and FR2787833 or in the support 16 provided with projections for this purpose, the axis 54 being distinct or integrated in the lever 41.
• a sealing pad 158 made of elastomer to absorb dimensional variations. This pad 158 is in contact with the contact surface of the contactor and is integral with a plastic part 155; the housing of the support 16 being retained. Alternatively, the pad 158 is removed and it is the plastic part 155 which is then in contact with the contact surface of the contactor.
• the rear end of the shaft 43 is configured to be secured to a plate of a planet carrier 47, for example by crimping, this planet carrier 47 belonging to to an epicyclic gear train constituting the gear reducer 45 gear.
• This planet carrier 47 carries satellites 47.1 meshing on the one hand with a ring 46 and with a sun gear 51 integral with the front end of the shaft 24 of the electric motor.
• the satellites 47.1 are therefore rotatably mounted each around an axis carried by a planet carrier plate 47.
• the ring 46 of the X-axis speed reducer 45 coincides with the axis 14 is of hollow form.
• This ring 46 has a wall 58 transverse to the outer periphery of which extends an annular base 60 of axial orientation provided with internal teeth 61.
• the transverse wall 58 has a central opening 63 permitting the passage of the shaft 43.
• the ring 46 is closed preferably at the rear by a closing bearing 59 shown in FIGS. 6a to 6c.
• the inside of the ring 46 can thus be filled with lubricating grease of the satellites 47.1 and the sun gear 49.
• the base 60 of the ring 46 further comprises, on a radial end face 601 opposite to the wall 58 of the tongues 603, which extend axially over a portion of the circumference of the base 60 (see FIGS. , 3b). This allows the gripping of the closing bearing.
• These tongues 603 are intended to fit in openings 591 of corresponding shape formed in the bearing 59 (see Figures 2a, 2b and 6a).
• the base 60 has two tabs 603 diametrically opposite one another.
• the bearing 59 further comprises an annular shoulder 592 of axial orientation whose inner periphery is intended to cooperate with the outer periphery of the base 60.
• the closing bearing 59 also comprises a central annular portion intended to receive a bearing 594 for mounting the shaft 24.
• an insert 64 reported clearly visible in Figures 4a, 4b, and 5a is positioned inside the annular base 60 to form the teeth of the ring 46 meshing with the satellites 47.1.
• the outer part of the insert 64 matches the internal shape of the base 60.
• the annular base (60) surrounding the insert has internal projections, in which the insert is mounted against the teeth of the base and in which the outer shape of the insert matches the shape of the internal projections of the base
• the base 60 is made of a plastic material while the insert 64 is made of a stronger material than the base 60, such as a metal-based material.
• the cylindrical base 60 has at its inner periphery internal teeth 61 which project radially from an inner periphery of the base 60 towards the inside of the base 60. These internal teeth 61 regularly distributed angularly on the circumference of the base 60 are separated from each other by spaces 68.
• the insert 64 of substantially cylindrical shape has internal teeth 65 forming radial projections which extend inwardly of the insert 64 and teeth external projections 67 forming radial projections extending outwardly of the insert 64. Holes of the inner teeth 65 correspond to the spaces separating the external teeth 67; while recesses of the outer teeth 67 correspond to the spaces separating the internal teeth 65. There is a regular alternation of internal teeth 65 and external teeth 67 on the circumference of the insert 64.
• the external teeth 67 of the insert 64 are intended to fit inside the spaces 68 separating the internal teeth 61 from the annular base 60 while the internal teeth 61 of the base 60 cooperate with the recesses of the internal teeth 65 corresponding to the spaces between the external teeth 67, so that the internal teeth 65 of the insert 64 substantially cover the internal teeth 61 of the base 60.
• holding means 70 provide a radial holding of the insert 64 against the inner annular face of the base 60.
• the holding means 70 comprise an annular groove 72 formed in the transverse wall 58 of the ring 46 intended to receive an axial end of the insert 64.
• the closing bearing 59 is also provided with an annular groove 73 formed at its outer periphery. intended to receive an axial end of the insert 64 which protrudes slightly with respect to the radial end face 601 of the base 60.
• the insert 64 is stuck axially between the transverse wall 58 of the ring 46 and the closing bearing 59.
• the axially oriented annular edges delimiting the grooves 72 and 72 between which the axial ends of the groove are positioned.
• the insert 64 provides radial retention of the insert 64.
• the grooves 72, 73 have a continuous annular shape but could alternatively, alternatively, be formed by a plurality of grooves regularly spaced from each other.
• the insert 64 comprises annular tabs of corresponding shape located at its axial ends intended to be inserted inside these discontinuous grooves 72, 73.
• the ring 46 is devoid of transverse wall 58 or the latter being reported by relative to the base 60
• the holding means 70 comprise a plurality of grooves 75 of axial depth extending radially in radial faces 601, 602 of the annular base 60 intended to receive a plurality of legs 76 of corresponding shape belonging to the
• the grooves 75 are formed in a radial extension of the bottom of the spaces 68 between the internal teeth of the base 60.
• These grooves 75 are angularly spaced regularly between them on the circumference of the base 60.
• the grooves 75 are located in the radial extension of a space 68 on two.
• the tabs 76 extend on either side of the insert 64 (see FIG. 4a) in the axial extension of a vertex of a plurality of external teeth 67. These tabs 76 are intended to cooperate with the grooves 75, opening towards the spaces 68. Thus, in the exemplary embodiment, the tabs 76 extend on either side of an external tooth 67 on two, as can be seen in FIG. 5a.
• the angular distribution of the tabs 76 may also be variable from one application to another, but in all cases, the angular positioning of the tabs 76 on the circumference of the insert 64 corresponds to the angular positioning of the grooves 75 on the circumference of the faces. radial 601, 602 of the base 60.
• the tabs 76 are intended to be folded towards the radial end walls 601, 602 of the base 60 so as to be inserted into the base 60. grooves 75.
• the folding of the tabs 76 is carried out before performing an overmolding operation to ensure that the insert 64 is held in translation relative to the base 60.
• notches 77 of shallow depth clearly visible in Figure 5a can be made on either side of the base of each lug 76 connected to the body of the insert 64.
• the insert 64 is advantageously obtained from a strip of material made of a metal-based material cut into a shape The end edges of the material web are folded towards each other in a circular path so as to have generally a cylindrical shape.
• the insert 64 is formed from a web of spirally wound cut material.
• the material of the insert 64 may for example be composed of about 0.07% carbon, about 1% silicon, about 2% manganese, 0.045 phosphorus, 0.030 sulfur, between 17.5 and 19.5% chromium, 0.1%. nitrogen, and between 8.0 and 10.5% nickel.
• the insert 64 has an outer diameter D1 passing through the vertices of the external teeth 67 of the order of 59mm substantially corresponding to the diameter D2 of the base 60 passing through the bottom of the spaces 68 separating the internal teeth 61 base 60 (see Figure 3b, 4b).
• the insert 64 also has an internal diameter D3 passing through the tops of the internal teeth 65 of the order of 54 mm corresponding to the diameter D4 of the base 60 passing through the apex of the internal teeth 61 (see Figure 3b, 4b).
• the axial length of the insert 64 is of the order of 18mm.
• the insert 64 has a thickness of the order of 0.3 mm.
• the angular gap A between two successive external teeth 67 of the insert 64 is of the order of 6 degrees.
• the insert 64 may comprise a smooth outer wall devoid of teeth 67 intended to be fixed, for example by gluing, to the inner wall of the base 60.
• the insert 64 then comprises only full internal teeth 65 intended to mesh with the teeth of the satellites 47.1 of the planet carrier 47.
• the materials of the base 60 and the insert 64 may be different from those described above.
• the base 60 may be made of any material other than plastic that has shock absorbing characteristics to minimize noise when the starter is in operation while the insert 64 may be made of any other material that a metal-based material as long as the chosen material makes it possible to stiffen the teeth of the ring 46.
• the starter 10 may furthermore comprise a shock absorbing device installed between the toothed crown 46 and the starter housing, in this case the support 16, able to absorb the shocks suffered by the ring 46 during generated over-torques. by starting the heat engine.
• the ring 46 comprises dampers 82 of elastomeric thermoplastic material clearly visible in Figures 2a, 2b, 3a, and 3c which are fixed on the transverse wall 58 of the ring 46. These dampers 82 are able to compress when the application of an over-torque. The compression is effected by a relative angular displacement of the dampers 82 integral in rotation with the ring gear 46 with respect to compressor elements integral in rotation with the starter housing intended to bear against the dampers 82.
• the base 60 is provided with elongate pads 85 forming radial projections relative to the outer periphery of the base 60 for cooperating with complementary shaped housing formed in the housing starter to maintain the ring 46 immobile in rotation relative to the housing.
• dampers may be carried by the starter housing.

Landscapes

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=49274732

Family Applications (1)

Country Status (3)

Families Citing this family (1)

Family Cites Families (13)

• 2013
  • 2013-04-15 FR FR1353387A patent/FR3004496B1/fr not_active Expired - Fee Related
• 2014
  • 2014-04-15 EP EP14725218.3A patent/EP2986842A1/de not_active Withdrawn
  • 2014-04-15 WO PCT/FR2014/050917 patent/WO2014170598A1/fr active Application Filing

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events