Spring end-stop blades fastened to a damping flywheel

Abstract

The invention relates to a damping flywheel (2) for a mobility vehicle, comprising - a central hub (20), the material extension of which forms a central plate (21), - a circular cavity (400) of axis (X) outside the central plate (21), inside which cavity there are housed at least: two damping springs (4) of curved shape, and an end-stop blade (5) arranged against adjacent ends (40) of the springs (4), the at least one end-stop blade (5) being partially housed inside the central plate (21) and fixedly attached to the central plate (21).

Claims

Claims

1. [A damping flywheel (2) for a mobility device, comprising - a central hub (20) whose material extension forms a central plate (21), - a circular cavity (400) with axis (X) outside the central plate (21), inside which are housed at least: two damping springs (4), of curved shapes, and a stop blade (5) arranged against neighboring ends (40) of said springs (4), the at least one stop blade being housed partially inside the central plate and fixedly attached to the central plate (21).

2. A damping flywheel (2) according to claim 1, wherein the thrust blade (5) is made of at least one sheet of metal sheet, of oblong shape, having for example - a thickness (eO) which is less than or equal to half the thickness (e2) of the central plate (21), and / or - a radial elongation (10) which is greater than or equal to 45% of the radial extension (pO) of the central plate (21), preferably greater than or equal to 1.4 times the radial extension of the circular cavity (400).

3. Damping flywheel (2) according to claim 1 or 2, in which it comprises at least one thrust blade (5) composed of an axial stack of several assembled layers, and / or a pair of thrust blades (5) diametrically opposed with respect to the axis (X).

4. Damping flywheel (2) according to one of the preceding claims, in which the stop blade comprises a retaining body (52) housed inside the central plate, and a stop head (51) originating from the extension of the retaining body (51), of solid and flared shape, adapted to the springs (4), preferably the stop head (51) defines with the retaining body (52) a flare angle (al) which is between 110 and 195 degrees.

5. Damping flywheel (2) according to the preceding claim, in which the stop blade (5) comprises a narrowing of material delimiting in flared forms the stop head (51) and the retaining body (52), preferably the stop head (51) defining with the retaining body (52) a flare angle (al) which is between 130 and 160 degrees.

6. A damping flywheel (2) according to claim 4 or 5, wherein a radial elongation (11) of the stop head (51) extends from the inner diameter to the outer diameter of the circular cavity, and / or a radial elongation (12) of the retaining body (52) is 1.5 times greater than or equal to the radial elongation (11) of the stop head (51).

7. Damping flywheel (2) according to one of the preceding claims, in which the stop blade (5) is retained in an imprint (25) of complementary shape, arranged radially from the external diameter (Dpi) of the central plate (21).

8. A damping flywheel (2) according to the preceding claim, wherein the thrust blade (5) is retained by fixing means arranged from the inner diameter of the imprint, the fixing means being received in mounting holes (57) of the thrust blade (5), for example being - reported (7, 57) and received in mounting holes (27) of the central plate, or - from material (6, 26, 57') of the central plate, for example in the form of lugs.

9. Damping flywheel (2) according to claim 7 or 8, wherein the thrust blade (5) is retained by axial retention elements (6) of the thrust blade, preferably originating from the material of the impression, for example material bulges (26) or discontinuous work hardening points (57').

10. Damping flywheel (2) according to one of claims 7 to 9, in which radial edges (250) of the imprint are in the form of undercuts (255) radially retaining the stop blade, and / or additional stop markings (45) of the ends (40) adjacent to the springs, are produced inside the circular cavity (400) and arranged angularly on either side of the at least one imprint (25).

11. A damping flywheel (2) according to one of the preceding claims, wherein the central hub (20) comprises at least one material clearance (28, 29) intended to contain a stop bushing (8, 9), preferably a material clearance (28, 29) machined along said central hub.

12. Damping flywheel (2) according to the preceding claim, in which two material clearances (28, 29) are machined from a recess (292) of the central hub (20), so as to respectively retain the axial stop sleeve (8) or a radial stop sleeve (9), each material clearance (28, 29) being delimited in abutment by at least one material shoulder (280, 290).

13. Stop blade (5) for a damping flywheel, comprising a flared truncated cone shape, in the form of a stop head (51) intended to come angularly into abutment against ends (40) adjacent to the springs (4) of the damping flywheel, the stop blade comprising a radial elongation, in the form of a retaining body intended to be attached to a central hub of a damping flywheel, preferably 1.5 times greater than or equal to the radial elongation of said stop head.

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