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
  • F02N15/06—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
• • 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

Definitions

• the present invention relates to a starter, and more particularly to a starter for an internal combustion engine of a motor vehicle.
• a starter for a motor vehicle essentially comprises an electric motor and an electromagnetic actuator.
• the actuating lever is produced therein in the form of a part, the central part of which is crossed by a hinge pin, the opposite ends of which are each received in two half-bearings
• the first two half-bearings are formed at the rear end of a plate which extends longitudinally from the starter nose having come integrally with this nose
• the two second half-bearings are formed at the front end of a rectangular plate which extends longitudinally and the rear end of which is secured to an element which calibrates the motor and the electromagnetic actuator
• the invention provides a starter of the type described above, of the type comprising an electromagnetic actuator and an electric motor with parallel axes and which are fixed to a starter frame comprising at least one starter nose forming a cover which surrounds the end of the the output member of the electromagnetic actuator and the free front end of an output shaft driven by the electric motor and which carries a launcher, and of the type comprising an actuation lever which controls the axial movements of the launcher which is mounted pivoting about an axis which is substantially perpendicular to the axes of the motor and the electromagnetic actuator and each of whose transverse ends is pivotally mounted in a two-part bearing comprising a first bearing part carried by the starter nose and a second part of complementary bearing formed opposite in a support piece of the lever connected to the motor housing and / or to the casing of the electromagnetic actuator, characterized in that the support piece of the lever comprises a transverse annular ring which cooperates with a complementary front part of the electromagnetic actuator Thanks to the invention, the support piece intervenes between the actuator and the nose of
• This annular ring fitted with the actuator can then be easily mounted in the upper part of the nose of the starter by interlocking, so that the mounting of the starter is thereby facilitated.
• the ring promotes filtration of vibrations.
• the internal diameter of the annular ring corresponds to the diameter of the complementary front part of the electromagnetic actuator, and, during assembly of the starter, the annular ring radially surrounds the front part of the electromagnetic actuator so as to ensure the centering of the electromagnetic actuator,
• the annular ring comprises at least one positioning pin which extends axially towards the rear and which, during the assembly of the starter, cooperates with at least one complementary hole of the electromagnetic actuator so that the electromagnetic actuator either angularly indexed relative to the annular crown,
• the annular ring comprises means for, during the assembly of the starter, maintain the body of a screw for the assembly of the electromagnetic actuator and the starter nose so that the threaded free end of the screw is facing a tapped hole intended to receive it,
• the means for holding the body of the screw are two lips which extend radially outwards from the periphery of the annular ring and which have a spacing substantially equal to the diameter of the screw
• the positioning pins are force-fitted into their complementary hole so that the actuator is captive
• the seal can be improved.
• the contact of the front part of the electromagnetic actuator on the rear face of the starter nose is made by means of surfaces. of metal which, for manufacturing reasons, are not strictly flat The flatness defects do not result in small gaps
• a solution proposes the establishment of a j anointed annular sealing between the front portion of the electromagnetic actuator and the rear face of the starter nose
• the annular ring is disposed axially between the front part of the electromagnetic actuator and the rear free end of the starter nose and is mounted axially compressed so as to seal between these two elements.
• the movable core can be moved easily because water does not risk infiltrating the starter. All this is favorable for the life of the starter.
• FIG. 1 is an overall view in axial section of a starter according to the state of the art
• FIG. 2 is a detail view on a larger scale of FIG. 1 before mounting the starter
• FIG. 3 is a partial view on a larger scale of the upper part of the starter according to the invention
• FIG. 4 is an exploded perspective view of some of the components of the starter equipped with a support piece for the actuating lever according to the invention.
• a starter 10 according to the prior art is illustrated in FIG. 1 II comprises a starter body or chassis, the main element of the housing of which is a starter nose 12 located at the front and which is produced in the form of '' a molded part for example made of aluminum
• An electromagnetic actuator 14 and an electric motor 16 are mounted and fixed to the rear of the nose 12
• the electromagnetic actuator 14 comprises a casing 15 of generally cylindrical shape, the front part of which forms a carcass, comprises an annular shoulder 18 consisting of a first radial annular face 20 turned towards the front and of a cylindrical lateral face 22
• a second radial annular front face 21 of the front part is substantially perpendicular to the longitudinal axis A2 of the electromagnetic actuator 14
• An annular part 24 corresponding to the shoulder 18 is formed at the rear of the starter nose 12 for fitting by fitting of the actuator. It comprises a third radial annular face 23 turned towards the rear which during assembly of the starter. 10 comes into contact with the first radial annular face 20, and a fourth radial annular face 25 turned towards the rear, offset axially towards the front with respect to the third radial annular face 23 After assembly, there is a clearance J1 between the second radial annular front face 21 of the electromagnetic actuator 14 and the fourth radial annular face 25 of the starter nose 12
• the third 23 and the fourth faces 25 are interconnected by a cylindrical side face 26 of greater axial length than the side face 22
• the electric motor 16, of axis A1 in particular comprises a globally cylindrical casing 17 and an armature shaft, not shown, the front part of which is stepped. the armature shaft and on the other hand allows a rotational movement to be transmitted to a planetary gear train which then rotates the rear free end section of a reduction gear output shaft 32
• the front free end section of the gearbox output shaft 32 is guided in a bearing located in the starter nose 12, as visible in FIG. 1 of the document FR-A-2 699 605
• the electric motor 16 is fixed to the starter nose 12 by fixing screws 34, in the form of tie rods, which pass longitudinally through the casings 15 and 17 and which are screwed into threads formed here in the starter nose 12
• a front launcher 36 slides axially on a fluted intermediate section 38 of the reduction gear output shaft 32 between a position before meshing with a starting ring gear and a rear position of rest
• FIG. 1 of FR-A-2 699 605 Such a crown is visible in FIG. 1 of FR-A-2 699 605 also showing the pinion which the launcher has at the front for meshing with said crown.
• the sliding of the front launcher 36 is controlled by a pivoting actuating lever 40 whose drive is provided by the electromagnetic actuator 14
• the electromagnetic actuator 14 is of a known structure, which will not be described in detail, and it allows, in addition to the supply of electrical energy to the electric motor 16 by a system called contactor, to cause the pivoting of the actuation lever. 40 by means of an outlet member 50, the free front end of which carries a transverse pin 52 which is received in a groove 54 formed at the upper end 56 of the actuating lever 40
• the outlet member consists of a rod pierced at its front end for passage of the pin 52 As visible in FIG. 1 of document FR-A-2 699 605 the other end of the rod has a head for supporting a tooth against tooth spring
• the carcass carries at least one coil 152 carried by a support 153
• a fixed core 154 penetrates into the support 153 of the coil 152 and serves as a guide for a rod 155 pushing on a movable contact (not visible) suitable for cooperating with a fixed contact (not visible) to supply the electric motor electrically 16
• the sliding launcher 36 is achieved by energizing the coil
• the sliding pinion then moves in the direction of the starter ring of the engine of the motor vehicle
• the electric motor 16 is then supplied and driven in rotation in order to drive in rotation the pinion of the starter and to make it mesh with certainty with the starter ring.
• the lever 40 is therefore allowed to pivot about an axis A3 described below and to bear at its lower end on the launcher 36 as described below As soon as the ignition key is released, the coil 152 is no longer activated and a return spring 156 recalls the movable core 151 and the lever 40 in their rest position
• the spring 156 surrounds the movable core 151 and bears at one of its ends on the casing of the casing 15 and at the other of its ends on a shoulder belonging to a part not referenced (as best seen in the figure 4)
• the actuating lever 40 is made of plastic material, possibly reinforced with fibers, it is pivotally mounted around a transverse geometric axis A3 which is materialized by two opposite sections 58 of a cylindrical axis which extend from faces opposite of the body of the actuating lever 40 II is perpendicular to the plane of FIG. 1 containing the axis A1 of rotation of the armature shaft of the electric motor 16 as well as the axis A2 of the electromagnetic actuator 14
• the lower part 60 of the actuating lever 40 has a form of fork which cooperates with a control range 62 of the launcher 36
• Each axis section 58 is rotatably mounted in a two-part bearing
• Each bearing thus comprises a first concave cylindrical half-bearing 64 and a second complementary concave cylindrical half-bearing 66
• the first two transverse opposite half-bearings 64 are formed at the end of a part in the form of a horizontal plate 68 which projects from the internal face turned towards the rear of the starter nose 12
• the plate 68 is produced by molding with the starter nose 12 and it extends in a plane containing the axis A3 and which is parallel to the axes A2 and A1 of the electromagnetic actuator 14 and the electric motor 16
• the plate 68 is positioned so that the axis A3 is located in a horizontal plane, considering FIG. 1, which extends between the casings 15 and 17 of the electromagnetic actuator 14 of the electric motor 16
• the front part of the plate 68 has a central clearance 70 which gives it a fork shape so as to allow the pivotal movements of the central part opposite 72 of the actuating lever 40
• the two second concave cylindrical half-bearings 66 are formed at the front end of a front portion 80 in the form of a rectangular parallelepiped of a support piece 82 of the actuating lever 40
• the support piece 82 of the lever 40 is a single piece molded from plastic, possibly reinforced with fibers, the front portion 80 of which is a horizontal plate which extends in a plane which, in the assembled position like this is illustrated in Figure 1, is in the extension of the horizontal plane of the plate-shaped part 68 of the starter nose 12
• the support piece 82 of the actuating lever 40 has a symmetry of design with respect to a vertical median plane which contains the longitudinal axes A2 and A1 of the electromagnetic actuator 14 and of the electric motor 16 and which corresponds to the cutting plane of figure 1
• the front portion 80 also includes a clearance 84 to allow the pivoting movements of the corresponding face 86 of the central part of the body of the actuation lever 40 about the hinge axis A3
• the intermediate portion 88 of the workpiece support 82 is a vertical element which extends in a plane perpendicular to that of the front portion 80 and which comprises a first concave cylindrical upper surface 90 which is complementary to the shoulder 18 of the electromagnetic actuator 14
• cylindrical lateral faces 22 and 26 have the A2 axis as their longitudinal axis.
• the lateral face 26 and the faces 23 and 25 are locally interrupted for the passage of the lever.
• the intermediate portion 88 closes this passage.
• the rear portion 92 has the general shape of a tube sector. It has ribs 94 on its underside. Two of them extend downward along each of the longitudinal edges, and a third extends towards the bottom transverse to the rear end of the portion 92
• Screws 104 are provided for assembling the cylinder head of the casing 15 to the nose 12 of the starter
• a transverse ring 100 of substantially annular shape extends vertically upwards from the upper face of the intermediate portion 88
• the support piece 82 of the actuating lever 40 and the transverse ring 100 are made by molding in plastic material and in one piece
• the outside diameter of the second radial annular front face 21 of the electromagnetic actuator 14 is reduced compared to the prior art so that it corresponds to the inside diameter of the transverse ring 100
• the axial thickness E of the transverse ring 100 is greater than the maximum clearance J2, shown in FIG. 4, which exists, after assembly of the starter 10, between the first 20 and the fourth 25 annular radial faces
• the transverse ring 100 is firstly mounted on the front part of the electromagnetic actuator 14, its internal diameter allows both the centering of the second radial annular front face
• the axis A4 of revolution of the transverse crown 100 corresponds to the longitudinal axis A2 of the electromagnetic actuator 14 constituting the axis of the face 26
• the rear annular transverse face 102 of the transverse ring 100 is then pressed against the first radial annular face 20 of the actuator 14
• the assembly 103 constituted by the electromagnetic contactor 14 and the transverse ring 100 is assembled to the starter nose 12
• the outer periphery of the first radial annular face 20 is pressed against the radial annular face 23
• the axial thickness E of the transverse ring 100 being greater than the maximum clearance J2, the transverse crown 100 is then compressed axially which makes it possible to ensure sealing against projections of water, at the level surfaces in contact with the crown 100 and the second 21 and fourth 25 radial annular faces
• the thickness E is slightly greater than the maximum clearance J2, all this depending on the elasticity of the material used for the support piece 82
• the difference is for example from 0.5mm to 2mm depending on the material of the crown 100
• the metal / metal contact ensures a stable fixing of the contactor by eliminating all the problems due to creep and the elasticity of the support piece 82 of the actuation lever 40 which would exist if it intervened in the fixing of the actuator 14 and of the starter nose 12
• the transverse ring 100 therefore makes it possible, on the one hand, to center the electromagnetic actuator 14 and, on the other hand, to ensure sealing between the starter nose 12 and the electromagnetic actuator 14
• the return spring 156 and the core mobile 151 of the actuator are therefore not likely to be reached by water coming from the outside so that good sliding of the mobile core is ensured
• Three positioning pins 106 are produced on the transverse crown 100 They have a conical shape and extend longitudinally rearward from the rear transverse face 102, their angular distribution relative to the axis A4 of the transverse crown n 'not being regular In fact, they thus allow the angular indexing of the electromagnetic actuator 14 relative to the support piece 82 of the lever 40
• the axis of a first pin of positioning 106 is included in the median plane, while the other two 106 are located on the transverse ring 100 symmetrically with respect to the median plane
• Three complementary longitudinal holes 108 are made in the first radial annular face 20 with their relative angular position which then corresponds to that of the three positioning pins 106
• the number of pawns depends on the applications, a pawn 106 being at least provided Thus, during assembly of the electronic actuator 14 and of the support piece 82 of the actuation lever 40, only one angular position is possible for the pins 106 to enter the holes 108.
• the diameter of the base of the positioning pins 106 is slightly greater than the diameter of the holes 108. This makes it possible to further improve the seal inside the electromagnetic actuator 14 provided by the annular ring 100.
• the positioning pins 106 are cylindrical.
• Screw holding means 1 10 104 are produced on the periphery of the transverse ring 100. They allow the passage and guiding of the assembly screws 104.
• the screw holding means 1 10 10 are for example holes made directly in the transverse crown 100 or pairs of substantially parallel lips which extend radially to the transverse crown 100 in accordance with the embodiment illustrated in FIG. 3.
• the assembly screws 104 are prepositioned in the assembly 103 so that the threaded free ends are oriented towards the rear.
• the screws 104 are introduced into holes (not shown) in the starter nose 12.
• These screws 104 are also held and pre-centered by the lips 1 10.
• the contactor 14 is positioned on the pins 106.
• the ends of the screws 104 are thus automatically centered in front of tapped holes 109 arranged in the contactor 14.
• the screwing of the screws 104 is finally carried out by means of their screw heads, not shown, situated outside the starter nose 12 and intended to bear on it this.
• the width of passage of the screws 104 in the holding means 110 is slightly less than the diameter of the screws 104 so as to "pinch" them.
• a flare 1 14 is made on a front part of the inner radial annular face of the transverse crown 100.
• the flare 1 14 has a frustoconical shape which facilitates the mounting, in the electromagnetic actuator 14, of the movable core as well as the spring of reminder that surrounds it. Indeed, the conical shape increases the diameter in which the rear free end of the movable core must be introduced initially during its assembly in the electromagnetic actuator 14.
• the support piece 82 of the lever 40 comprising the annular crown 100 allows to economically perform several functions which are: the articulation of the actuating lever 40, centering the electromagnetic actuator 14, the angular indexing of the actuator 14, the seal between the starter nose 12 and the electromagnetic actuator 14, guiding and holding the screws assembly 104 as well as the prepositioning of the movable core and its return spring before their mounting in the electromagnetic actuator 14.
• the support piece 82 of the actuating lever 40 according to the invention therefore makes it possible to facilitate the assembly of the starter 10 without increasing either the number of parts to be assembled, or the price of the starter 10.
• the support piece 82 may be produced according to the co-molding technique with its lower part made of rigid plastic material and its upper sealing part made of elastic material.
• a continuous bead forming a closed line on each of the radial faces of the crown 100, bearing on the faces 21 and 25, makes it possible to limit the compressive force exerted during tightening by means of the screws 104 during assembly. of the actuator 14 on the starter.
• plastic part 82 is light and does not risk rusting. This part reduces friction at the articulation of the actuating lever 40, itself made of plastic. Corrosion phenomena are therefore reduced.
• the part 82 and the lever 40 promote the reduction of noise, are easily obtained by molding and make it possible to lighten the starter. These parts 40, 82 can have the desired shape and are economical.
• the part 82 makes it possible, by its portion 88, to seal the local opening made behind the nose 12 for the passage of the lever 40. This opening affects the faces 25, 26 as visible in FIG. 4.
• the part 82 has another function because, thanks to its rear portion or part 92, it sealingly closes an opening made at the front of the casing 17, to prevent any movement of the part 82.
• the rear part has two longitudinal ribs capable of cooperating with the longitudinal edges of said opening.
• the rear part 92 is mounted, preferably by force, in the manner of a drawer in this opening.
• the ribs 94 are recessed from the longitudinal side edges of the rear portion to obtain a good seal and easy assembly.
• the third rib 94 perpendicular to the other two ribs, abuts against the stator 160 of the electric motor.
• the casing 17 comprises a front part and a rear part arranged on either side of the stator 160 closing the abovementioned opening.
• this opening is closed by the casing itself then in a single part.
• the output shaft carrying the launcher is driven in rotation by the electric motor.
• the output or armature shaft of the electric motor can be splined at its free end and drive an output shaft in rotation in the same way as the output shaft of the reduction gear 32 of FIG. 1.
• the pins 106 are carried centrally by ears 160.
• clearances are made in the cylindrical lateral face 26 of the nose of the starter, for mounting ears 160 so a locking in rotation of the ears 160 is achieved, the latter being advantageously engaged in clamping in their release.

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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)

Applications Claiming Priority (3)

Publications (2)

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ID=9551541

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• 1999
  • 1999-10-29 FR FR9913603A patent/FR2800422B1/fr not_active Expired - Fee Related
• 2000
  • 2000-10-26 WO PCT/FR2000/002995 patent/WO2001031195A1/fr active IP Right Grant
  • 2000-10-26 DE DE60018387T patent/DE60018387T2/de not_active Expired - Lifetime
  • 2000-10-26 CN CNB008024103A patent/CN1165683C/zh not_active Expired - Fee Related
  • 2000-10-26 EP EP00974577A patent/EP1147308B1/de not_active Expired - Lifetime
  • 2000-10-26 KR KR1020017008327A patent/KR100688827B1/ko active IP Right Grant

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