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US 6,664,652 B2Granted
Starter equipped with a torque-limiter and damper device
AssigneeValeo Equipement Electriques Moteur
InventorOlivier Chane-Waye
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AssigneeValeo Equipement Electriques Moteur
InventorOlivier Chane-Waye
Estimating the term…
A motor-vehicle starter of the type including an electric motor (10) including a cylindrical casing (24) within which the crown ring (58), internally toothed, of a planetary gear train (22) is mounted so as to rotate, and of the type in which the crown ring (58) is linked in rotation to the casing (24) by way of a torque-limiter device which is interposed between the crown ring (58) and a lateral flange (30, 34) and which consists of at least one annular, friction side face (82, 84) of the crown ring (58) and of a disc (88, 89) which is linked in rotation to the casing (24), which are pressed axially and elastically against one another by an elastic element (112), wherein the disc (88, 89) is linked in rotation to the casing (24) by way of at least one damper block (92), elastically deformable, which absorbs mechanical energy when it is compressed, in such a way as to damp the variations in torque transmitted to the crown ring (58).
Motor-vehicle starter including an electric motor (10) an output shaft (16) of which rotationally drives a coaxial drive with the interposition a step-down planetary gear train (22) including a cylindrical casing (24) within which a crown ring (58), internally toothed, of the planetary gear train (22) is mounted so as to rotate, and of the type in which the crown ring (58) is linked in rotation to the casing (24) by way of a friction-type torque-limiter device which is interposed axially between the crown ring (58) and a lateral flange (30, 34) of the casing (24) and which consists of at least one annular, friction side face (82, 84) of the crown ring (58) and of a disc (88, 89) which is linked in rotation to the casing (24), which are pressed axially and elastically against one another by an elastic element (112) bearing axially on a reaction surface of the disc (88, 89), wherein the disc (88, 89) is linked in rotation to the casing (24) by way of at least one damper block (92), elastically deformable, which absorbs mechanical energy when it is compressed, in such a way as to damp the variations in torque transmitted to the crown ring (58).
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
The gearing including a speed reducer: of the planetary type
Elastomeric springs: elastic elements arranged between substantially-radial walls of two parts rotatable with respect to each other, e.g. between…
Automatic: reduction gearing
Starting of combustion engines
Term ended 30 Oct 2021 (estimated)
1. Field of the Intention
The present invention relates to a motor-vehicle starter.
The invention relates more particularly to a starter of the type including an electric motor the output shaft of which rotationally drives a coaxial inertia-type drive with the interposition of a step-down planetary-meshing gear train.
Other characteristics and advantages of the invention will emerge on reading the detailed description which follows, for an understanding of which reference will be made to the attached drawings, among which:
FIG. 1 is a view in partial axial section of the electric motor of a starter associated with a planetary gear train including a torque-limiter and damper device produced in accordance with the teachings of the invention;
FIG. 1A represents, in detail, a part of the damper and limiter device represented in FIG. 1;
In FIG. 1 has been represented an electric motor 10 belonging to a starter of a motor vehicle (not represented in detail), the rotor 12 of which is mounted so as to rotate about an axis X—X within a casing or stator 14, these two elements 12 and 14 being represented diagrammatically in the figure.
The output shaft 16 of the electric motor 10, linked in rotation to the rotor 12, projects axially beyond the front face 18 of the stator 14 and rotationally drives a pinion 20 which is the sun pinion of a planetary gear train 22 arranged within the casing 24 of a step-down gear 26 associated with the electric motor 10.
The casing 24 consists in essence of a cylindrical annular skirt 28, of a disc-shaped rear flange 30, pierced at its centre 32 in order to let through the sun pinion 20 and the output shaft 16, and of a front lateral flange 34, pierced at its centre 36 in order to let through the output shaft 38 of the step-down gear 26, which is intended to drive the inertia-type drive (not represented) of the starter in rotation by way of splines (not represented).