Freewheel assembly having a deep-drawn flange
View Patent ↗A freewheel assembly includes a central axis of rotation, a single-piece flange formed by deep drawing, and a freewheel unit. The single-piece flange includes a sleeve portion, a disk portion protruding radially outward from the sleeve portion, and a centering collar. The disk portion includes a first end face and the centering collar is formed on the first end face. The freewheel unit includes an outer ring fastened to the sleeve portion by press fitting, and a plurality of rolling elements accommodated within the outer ring. The outer ring includes a plurality of clamping ramps, and each one of the plurality of rolling elements cooperates with a one of the plurality of clamping ramps.
1. A freewheel assembly comprising:
a central axis of rotation;
a single-piece flange formed by deep-drawing, the single-piece flange comprising:
a sleeve portion;
a disk portion protruding radially outward from the sleeve portion, the disk portion comprising a first end face; and
a centering collar formed on the first end face, the centering collar forming a bearing surface pointing radially outward;
a freewheel unit comprising:
an outer ring fastened to the sleeve portion by press fitting, the outer ring comprising a plurality of clamping ramps; and
a plurality of rolling elements accommodated within the outer ring, each one of the plurality of rolling elements cooperating with a one of the plurality of clamping ramps.
2. The freewheel assembly of claim 1 , wherein the disk portion comprises a plurality of through holes circumferentially distributed radially outside of the centering collar.
3. The freewheel assembly of claim 1 an outer ring axial length equals a sleeve portion axial length.
4. The freewheel assembly of claim 1 wherein the single-piece flange further comprises:
a second end face facing away from the first end face; and
a circumferential groove impressed on the second end face.
5. The freewheel assembly of claim 4 , wherein the circumferential groove is arranged at a same radial height as the centering collar.
6. The freewheel assembly of claim 1 , wherein a sleeve portion outer diameter is smaller than a centering collar outer diameter.
7. The freewheel assembly of claim 1 , wherein the disk portion is arranged to be eccentric to the sleeve portion when viewed in an axial direction.
8. The freewheel assembly of claim 1 wherein the sleeve portion and the disk portion are arranged relative to one another in such a way that the single-piece flange has an L-shaped cross-sectional area.
9. A freewheel assembly comprising:
a central axis of rotation;
a single-piece flange formed by deep-drawing, the single-piece flange comprising:
a sleeve portion;
a disk portion protruding radially outward from the sleeve portion, the disk portion comprising a first end face;
a centering collar formed on the first end face;
a second end face facing away from the first end face; and
a circumferential groove impressed on the second end face;
a freewheel unit comprising:
an outer ring fastened to the sleeve portion by press fitting, the outer ring comprising a plurality of clamping ramps; and
a plurality of rolling elements accommodated within the outer ring, each one of the plurality of rolling elements cooperating with a one of the plurality of clamping ramps.
10. The freewheel assembly of claim 9 , wherein the circumferential groove is arranged at a same radial height as the centering collar.
11. A freewheel assembly comprising:
a central axis of rotation;
a single-piece flange formed by deep-drawing, the single-piece flange comprising:
a sleeve portion;
a disk portion protruding radially outward from the sleeve portion, the disk portion comprising a first end face; and
a centering collar formed on the first end face;
a freewheel unit comprising:
an outer ring fastened to the sleeve portion by press fitting, the outer ring comprising a plurality of clamping ramps; and
a plurality of rolling elements accommodated within the outer ring, each one of the plurality of rolling elements cooperating with a one of the plurality of clamping ramps, wherein a sleeve portion outer diameter is smaller than a centering collar outer diameter.