Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K5/00—Casings; Enclosures; Supports
  • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
  • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
  • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
  • H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K1/00—Details of the magnetic circuit
  • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
  • H02K1/12—Stationary parts of the magnetic circuit
  • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
  • H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K5/00—Casings; Enclosures; Supports
  • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
  • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K5/00—Casings; Enclosures; Supports
  • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
  • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
  • H02K5/167—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
  • H02K5/1672—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings radially supporting the rotary shaft at both ends of the rotor
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K5/00—Casings; Enclosures; Supports
  • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
  • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
  • H02K5/225—Terminal boxes or connection arrangements

Definitions

• the present invention relates to the field of starters and in particular starters for a motor vehicle.
• Starters include an electric motor.
• the electric motor comprises a yoke in which coils or magnets forming poles are arranged.
• the rear portion of the cylinder head is closed by a cap covering the end of the cylinder head and comprising the rear bearing supporting the starter drive shaft.
• the cover is fixed to the cylinder head by fastening means such as longitudinal tie rods located outside the cylinder head and now the hood against the cylinder head.
• fastening means such as longitudinal tie rods located outside the cylinder head and now the hood against the cylinder head.
• the number of tie rods is generally limited, for example two, to limit the size and costs so that the tightening of the tie rods tends to deform the hood.
• the latter is then punctually no longer in contact with the cylinder head so that the seal between the cylinder head and the cover can no longer be ensured.
• Liquid including water, especially saline can then enter the cylinder head by capillarity between the cylinder head and the hood where there is no
• a first means of the state of the art is to form a flow between the inside and outside of the cylinder head at the hood or the rear bearing so as to evacuate transient and stagnant liquids in this portion.
• This solution makes it possible in particular to avoid the stagnation of liquids and limits the erosion of the cylinder head and the rear cover.
• a second means of the prior art is to form a sealed connection between the cylinder head and the rear bearing for example by means of an O-ring to prevent the liquid from entering this junction.
• a grommet routing the supply son is arranged in a notch of the rear bearing.
• the latter is generally made of a rubbery material to form a seal.
• a disadvantage of such a notch is that it contributes to the deformation of the rear bearing when the latter is held in tension on the rear end of the cylinder head. Indeed, the notch reduces the stiffness of the part because the quadratic module is considerably reduced locally. This has the consequence that the circumferential joint between the rear bearing and the yoke is not uniform.
• the present invention is therefore to better protect the starter of an engine from the corrosion of the brushes and / or the brush holder.
• the invention relates to a starter, particularly for a motor vehicle, comprising:
• the rear bearing further comprises a continuous section all around its circumference in a plane orthogonal to the axis of revolution, said section cutting the rear bearing at the overlap.
• the rear end of the yoke and the end of the rear bearing comprise an extreme circumferential portion ensuring a continuous contact between a surface of the yoke and a surface of the rear bearing.
• This continuous contact is in one embodiment, a contact locally planar but extends all along the circumference of the starter in an annular contact.
• the invention relates to a starter, particularly a motor vehicle comprising:
• the starter further comprises:
• One advantage is to provide a robust, waterproof solution and limiting deformation of the rear bearing.
• the solution of the invention allows a better distribution of stresses at the periphery of the edge of the rear bearing.
• the lateral opening is a notch opening on a portion of the rear end of the cylinder head.
• the lateral opening is a hole passing through the lateral face of the cylinder head.
• the invention relates to a starter, particularly a motor vehicle comprising:
• a grommet mounted in said lateral opening for the passage of electric wires (38) for supplying the starter.
• the lateral opening has a continuous lateral edge all around its inner periphery.
• the starter comprises, in a plane perpendicular to the axis of the starter and cutting the rear bearing between the lateral opening and the cylinder head, a section of the rear bearing which extends over 360 ° surrounding a hole .
• the starter comprises a strapping partially covering the outer surface of the body of the rear bearing, said strapping having a strut opening forming a through hole extending the lateral opening, said strapping opening being larger than the lateral opening so as to define a border around the lateral opening for holding the grommet.
• the grommet covers the entire surface of the lateral opening so as to produce a seal, especially a seal, between the outside and the inside of the perimeter of the lateral opening.
• the rear bearing forms a cover comprising a closing section, a lateral part, the lateral part cooperating with an internal or external surface of the bolt, said rear bearing comprising at least two lumens in which fixing rods. maintain the rear bearing secured to the yoke, the rods extending along the yoke and being fixed to a starter support.
• the lateral portion of the rear bearing comprises a skirt covering the rear end of the cylinder head.
• the covering skirt comprises two radial thicknesses in which are formed the lights forming longitudinal holes for the passage of the fixing rods.
• the lateral portion of the rear bearing comprises an outer surface and an inner surface of which a portion is intended to be in contact with an outer portion of the yoke.
• the lateral portion of the rear bearing has on its outer surface a reinforcing rib extending over a portion of the end of its side portion.
• the reinforcing rib may preferentially define a continuous portion along the circumference of the rear bearing so as to limit its deformations.
• the lateral portion of the rear bearing comprises a portion straddling the yoke, this portion comprising in a plane orthogonal to the axis in which the yoke extends, a continuous section, for example a ring.
• One advantage is to strengthen the junction between the cylinder head and the rear support.
• the rear end of the cylinder head and / or the lateral portion of the rear bearing comprises a groove adapted to receive the seal.
• the rear bearing comprises a circumferential chamfer forming a sealing surface of the seal.
• This chamfer is machined on the inner surface of the lateral part of the rear bearing. The machining of the rear bearing defining a chamfer makes it possible to improve the maintenance of the seal and thus offers a better seal of the starter.
• the grommet comprises a groove for receiving a portion of the seal extending the groove of the bolt on the portion of the notch.
• the rear bearing is made of aluminum
• the cylinder head is made of steel
• the seal is toric or lip, and / or;
• the grommet is made of thick rubbery material.
• the starter comprises, in a plane perpendicular to the axis of the starter and cutting the seal, a section of the rear bearing which extends over 360 ° surrounding a hole.
• the seal is annular.
• the seal is distinct from the grommet.
• FIG. 1 a three-dimensional representation of a first embodiment of a starter comprising a yoke, a rear bearing and a wire pass;
• FIG. 2 a three-dimensional representation of a starter to which the rear bearing removed reveals a junction plate
• FIG. 3 a three-dimensional representation of a starter to which the removed grommet reveals an opening forming a notch opening
• FIG. 4 a three-dimensional representation of a junction between a grommet of a starter of the invention with a seal
• FIG. 5 a three-dimensional representation of a junction between a grommet of a starter of the invention with a seal
• FIG. 6 a section of a starter in which are shown a section of the cylinder head, the rear bearing and the wire pass;
• FIG. 7 a representation of a second embodiment in which a grommet is arranged in an opening through the body of the cylinder head and having a closed periphery;
• FIG. 8 a representation of the second embodiment in which the grommet is removed to reveal the opening
• FIG. 9 two three-dimensional views of a third embodiment wherein the rear bearing has an opening arranged beyond the reinforcing rib which borders the circumferential end of the workpiece.
• the yoke 3 has a substantially general shape of revolution along an axis of revolution ⁇ - ⁇ '. This is the axis that extends the most large dimension of the cylinder head 3. In the present description we will speak indifferently of the axis of revolution XX 'of the cylinder head or the axis along which the cylinder head 3 extends. According to one embodiment, the cylinder head 3 has a substantially cylindrical shape.
• the rear bearing 5 forms a cover of the cylinder head 3. It is designed to cooperate with one end of the cylinder head 3, it is the rear end of the cylinder head 3. As a result, the shape of the rear bearing 5 is adapted to cooperate with the rear end of the yoke 3. According to one embodiment, the rear bearing 5 has a substantially cylindrical shape.
• FIG. 1 represents an embodiment of the invention in which the yoke 3 and the rear bearing 5 are assembled.
• the rear bearing 5 comprises a closing face 51 which forms a bottom of the hood and a main opening 53 in which the rear end of the yoke 3 is inserted.
• the closing face 51 of the rear bearing 5 comprises in its center an opening on a central portion 58 for the passage of the drive shaft which passes through the cylinder head.
• the central portion is in the form of a plug comprising a central lumen.
• the closing face 51 and the main opening 53 of the rear bearing are better represented on reading FIG. 10, the perspective of which reveals the inside of the rear bearing 5.
• the rear bearing 5 has a lateral face 52 which is annular whose diameter is slightly greater or slightly smaller than the diameter of the yoke 5 to embed a room in the other.
• the rear bearing 5 is described with a diameter greater than the diameter of the rear end of the cylinder head 3.
• the invention also applies to the variant in which the main opening end 53 of the rear bearing 5 fits into the rear end of the cylinder head 3, the rear end of the cylinder head 3 then covering a portion of the rear bearing 5.
• a plate 34 is arranged between the rear bearing 5 and the cylinder head 3.
• FIG. 2 represents an embodiment of such a plate 34.
• the plate 34 comprises a central opening for the passage of the drive shaft which is rotating about the axis of revolution X-X '.
• the plate 34 has a surface at its circumference that defines an edge that can according to one embodiment contribute to maintain the seal 36.
• the edge of the plate provides a bearing surface for positioning the plate 34 to the cylinder head 3 or the rear bearing 5.
• the rear bearing 5 or the cylinder head 3 may comprise a circumferential stop intended to accommodate the edge of the plate 34.
• Figure 6 shows a sectional view of the starter 1 and illustrates an embodiment in which the plate 34 provides a bearing surface to the cylinder head 3 when the parts are assembled.
• the plate 34 is itself maintained by the presence of a circumferential stop.
• the plate 34 defines an edge of the groove 31 into which the gasket 36 is inserted.
• the cylinder head is according to an embodiment made of steel.
• the steel makes it possible to protect the cylinder head 3 from the parasitic electromagnetic effects surrounding the mechanical parts.
• the yoke 3 has a stiffness greater than that of the rear bearing 5.
• the rear bearing 5 can be made of aluminum.
• the yoke 3 may comprise an additional strapping 32 partially covering the outer surface of the body 33 of the yoke 3.
• the additional strapping 32 may be made of the same material as the body 33 of the yoke or in a different material.
• FIG. 6 is a sectional view of the additional strapping 32 extending over a portion of the yoke 3.
• the rear bearing 5 is fixed to the cylinder head by means of fixing rods, also called tie rods.
• the fastening rods are not shown in the figures.
• the fastening rods are used to fix the rear bearing 5 to a support of the cylinder head arranged at another end of the latter. Under the force of the fastening rods clamping the parts, the rear bearing 5 and thus the cylinder head 3 undergo compression forces.
• a set of tie rods keep the cylinder head 3 and the rear bearing 5 fixed to each other.
• the two tie rods extend along the axis of revolution XX 'of the cylinder head 3. In the latter case, they can advantageously be arranged diametrically opposite to the form of revolution of the cylinder.
• the rear bearing 5 comprises longitudinal slots 54, each being formed in a radial oversize 57.
• the longitudinal slots 54 provide a holding function and guide rods along the length of the cylinder head 3. They are preferably oriented parallel to the axis of revolution of the X-X 'yoke.
• a hole when a hole is said to be "crossing”, it is indifferently referred to as a hole traversing the surface of a part or a hole passing through the body of the part to the extent that the hole forms a passage between the outside. and the interior of the room.
• the opening is a notch 35 formed on the lateral body 33 of the yoke 3.
• the notch 35 is emerging on the rear end of the cylinder head 3.
• the lateral opening 35 is not defined by a closed perimeter.
• Figures 1 to 6 illustrate this first main embodiment.
• the opening is a hole passing through the lateral body 33 of the cylinder head 3.
• the lateral opening 35 may be defined by a closed perimeter.
• Figures 7 and 8 illustrate this second main embodiment.
• the opening is a hole passing through the surface of the rear bearing 5.
• the yoke 3 has no opening for arranging the grommet 37.
• the latter is arranged in the opening of the rear bearing 5.
• the lateral opening 35 can be defined by a closed perimeter.
• Figures 9 and 10 illustrate this third main embodiment.
• a lateral opening 35 is intended to accommodate a grommet 37.
• FIG. 1 shows an embodiment in which the grommet 37 is arranged in the lateral opening 35 of the cylinder head 3.
• FIG. 3 represents the same embodiment having the lateral opening 35 without the grommet 37.
• the grommet 37 is designed to be held in the lateral opening 35.
• its shape, its material and its arrangement in the lateral opening 35 are defined to optimize its retention in the lateral opening 35 and ensure a seal of the interior of the cylinder head 3 vis-à-vis the external environment of the cylinder head 3.
• the grommet 37 In order to seal the starter 1, the grommet 37, necessary to route the feed to the starter 1, is made of rubbery material.
• the rubbery material covers the entire lateral opening 35.
• the dimensions of the lateral opening 35 are therefore designed for the passage of the son and a minimum amount of material intended to seal the area of the opening .
• the rubbery material also makes it possible to avoid short circuits.
• the amount of material of the grommet 37 is sized to withstand temperature increases during operation of the starter 1 and to maintain deformations induced by said temperature increases.
• the lateral opening 35 intended to receive the grommet 37 is extended to the surface of the strapping 32 in the case where the latter had to overlap the lateral opening 35.
• FIGS. 3 and 8 show such an embodiment in which the strapping 32 has an opening 321 larger than the lateral opening 35.
• An advantage of the strapping 32 is that it allows the gasket 36 to be wedged axially and thus maintain a tight contact between the cylinder head 3 and the rear bearing 5.
• the lateral opening 35 is made so as to avoid weakening the edge of the rear bearing 5.
• the rear bearing 5 is highly stressed in compression and bending and can be weakened by any machining resulting in its edge asymmetry that could for example, be caused by the presence of a notch made at the end of the rear bearing 5. This solution would not effectively seal the starter 1 after a given operating time.
• the yoke 3 is made of steel, the lateral opening 35 arranged on its surface contributes much less to the deformation of the starter 1 than the solution where the notch is made at the edge of the rear bearing 5 which is aluminum. Indeed, the main effort is supported by the rear bearing 5 which is maintained by the tie rods and not by the 3.
• the cylinder head 3 receiving the rear bearing 5 is not biased in bending but only in compression, indirectly by the tie rods.
• a remarkable aspect of the invention is that the notch 35 made on the cylinder head 3 provides a starter 1 more waterproof and therefore more resistant in the duration of its use.
• the lateral opening 35 is a hole passing through the body 33 of the cylinder head 3.
• the lateral opening 35 has a closed perimeter.
• the lateral opening 35 is a hole passing through the surface of the rear bearing 5.
• the lateral opening 35 has a closed perimeter.
• the through hole 35 formed on the surface of the rear bearing is formed beyond a reinforcing rib 55 described below. This case makes it possible to avoid weakening the edge of the rear bearing 5 and contributes to reinforcing its rigidity.
• the through hole 35 made beyond the reinforcing rib 55 limits its contribution to the deformations of the rear bearing 5 generated under the stresses in compression and bending caused by the tie rods.
• the rear bearing 5 comprises a portion overlapping the yoke 3 when the rear bearing 5 is assembled on the breech 3.
• the portion overlapping the breech 3 forms a covering skirt 56 of the rear end of the breech 3.
• this covering skirt 56 extends all along the circumference of the edge of the rear bearing 5 and also at the level of the radial oversize 57.
• each radial oversize 57 extends the covering skirt 56 to form an overflow lip 570 extending over a portion of the cylinder head 3.
• the overflow lips 570 extend over the surface of the cylinder head in the direction of the axis of revolution X-X '.
• Figures 7, 9 and 10 illustrate the covering skirt 56, the radial oversize 57 and the overflow lips 570.
• the rear bearing 5 comprises two overflow lips 570. In another embodiment, the rear bearing 5 comprises a plurality of overflow lips 570.
• the portion overlapping the rear end of the yoke 5 covers a continuous portion of the circumference of the yoke 3.
• the entire section of the portion of the rear bearing 5 overlapping the end rear of the cylinder head 3 defines a continuous section.
• the rear end of the yoke 3 overlaps a portion of the lateral surface of the rear bearing 5.
• This embodiment is not shown and is an alternative embodiment of the compatible invention of all these embodiments.
• the starter 1 of the invention comprises a gasket 36 for sealing the interior of the cylinder head 3 when it is fixed to the rear bearing 5.
• a function of the gasket 36 is to avoid the circulation of fluid from outside the starter 1 in the breech.
• a seal 36 is arranged at the circumferential junction of the yoke 3 and the rear bearing 5.
• FIG. 3 represents an exemplary embodiment of an arrangement of a seal 36 held in a groove 31 of the yoke 3, itself shown in Figure 8.
• the groove 31 may be formed in the inner surface of the side portion 52 of the rear bearing 5. This latter mode is not shown.
• the seal 36 is intended to be in contact with an inner portion of the lateral portion 52 of the rear bearing 5 when the latter is fixed to the yoke 3.
• the rear bearing 5 comprises a circumferential chamfer 59 forming a surface contact with the seal 36 to maintain a tight contact between the cylinder head 3 and the rear bearing 5.
• FIG. 5 shows a chamfer 59 forming an annular contact surface for holding the seal 36.
• FIG. 5 also shows the plate 34 arranged in the rear bearing 5 and capable, according to a particular embodiment, of forming a surface additional contact for holding the gasket 36.
• an advantage is that it can be arranged so as to form an edge 322 at the rear end of the yoke 3 to define a surface of maintaining the seal 36 when it is arranged in the groove 31.
• Figure 6 also illustrates the contact between the additional strapping 32 and the seal 36.
• the seal 36 is an O-ring. According to another embodiment, the seal 36 is a lip seal.
• the grommet 37 When the opening 35 intended to receive the grommet 37 is a notch opening at the rear end of the cylinder head 3, as shown in FIG. 3, the grommet 37 has a groove 39 adapted to receive a portion of the seal. 36. In this embodiment, the groove 39 of the grommet 37 completes and extends the groove 31 of the breech 3.
• FIG. 4 shows the junction between the grommet 37 and the seal 36 extending the groove 31 in the form a rubber groove 39.
• FIGS 2 and 4 show a grommet 37 having a portion adapted to receive a portion of the seal 36.
• the grommet 37 has a portion in contact with the seal 36 so as to contribute to the sealing of the starter 1.
• the rear bearing 5 comprises a reinforcing rib 55 arranged on its periphery at the end of the edge of its circumferential opening 53.
• the rib 55 is arranged on the outer surface of the rear bearing 5.
• the reinforcing rib 55 extends in a plane orthogonal to the axis in which the yoke 3 extends.
• the section of the reinforcing rib 55 forms a ring, it is said to be annular.
• the section of the reinforcing rib 55 has the same profile as a section of the rear bearing 5 in a plane orthogonal to the axis of revolution.
• the reinforcing rib 55 forms an extra thickness on a portion of the outer surface of the lateral portion of the rear support 5.
• the reinforcing rib 55 may be created by adding material.
• the reinforcing rib 55 is present at the level of the overlap of the rear bearing 5 and the yoke 3.
• FIGS. 1, 7, 9 and 10 show a reinforcing rib 55 which seems to merge with the part forming the covering skirt 56.
• the width of the reinforcing rib 55 may correspond to the width of the skirt overlap 56, that is to say the portion straddling the yoke 3, in particular on the portions not corresponding to the radial oversize 57.
• the reinforcing rib 55 may extend over the surface of the rear bearing 5 over a width that exceeds the width of the cover skirt thus providing better mechanical strength of the part.
• the width of the reinforcing rib 55 may be narrower than the portion forming the covering skirt 56 so as to save material and thus reduce the weight of the workpiece. This solution offers increased compactness of the starter 1.
• the reinforcing rib 55 is a strapping or a retaining ring of a portion of the surface of the lateral portion of the rear bearing 5.
• the reinforcing rib may comprise an extra thickness of material and additional strapping.
• the reinforcing rib 55 provides a better resistance of the rear bearing 5 to the deformations when the latter is mechanically stressed.
• the stresses may, for example, be related to the fastening rods exerting a constant force on the mechanical parts thus secured.
• a second reinforcing rib may be provided around the through hole 35 of the rear bearing 5 forming the lateral opening. This solution aims at reinforcing the recessed portion of the rear bearing 5 forming the lateral opening 35.
• This second reinforcing rib can be made in all the embodiments including those in which the lateral opening 35 is made in the body 33 of the breech 3.

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Gasket Seals (AREA)
• Motor Or Generator Frames (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=56684053

Family Applications (1)

Country Status (4)

Family Cites Families (2)

• 2016
  • 2016-05-27 FR FR1654772A patent/FR3051847A1/fr active Pending
• 2017
  • 2017-05-11 WO PCT/FR2017/051129 patent/WO2017203122A1/fr unknown
  • 2017-05-11 EP EP17727651.6A patent/EP3465881A1/de not_active Withdrawn
  • 2017-05-11 US US16/303,157 patent/US20190296604A1/en not_active Abandoned

Also Published As

Similar Documents

Legal Events