Method of manufacturing rolling bearing device for wheel
A method of manufacturing a double row rolling bearing device includes: providing a collet chuck having radially expandable separated parts and a tapered cone for radially expanding the separated parts; inserting the radially contracted collet chuck into a through hole before the double row rolling bearing is caulked to the hub shaft; caulking the cylindrical end of the hub shaft, with the separated parts being in contact with the end by radially expanding the collet chuck to prevent radially inward plastic deformation of the end; and contracting the collet chuck and extracting the collet chuck out of the hub shaft after the caulking.
1. A method of manufacturing a rolling bearing device for a wheel in which a rolling bearing is disposed around an outer circumference of a hub shaft which includes a through hole axially formed therethrough and an engaging portion, formed around an inner circumference of the through hole, to be engaged with an outer ring of a joint member, and a cylindrical end of the hub shaft is caulked to a rolling bearing by bending the end radially outward, the method comprising:
preparing a collet chuck that includes a cylindrical portion and a plurality of separated portions formed by separating the cylindrical portion in an axial direction, the plurality of separated portions being radially expandable and shrinkable, and a diameter-changing portion for the collet chuck that radially expands and contracts the collet chuck;
inserting the collet chuck into the through hole of the hub shaft in a state that the collet chuck is radially contracted;
radially expanding the collet chuck so as to make the separated parts contact with the end;
caulking the end of the hub shaft in the state that the separated parts are in contact with the end to prevent radially inward plastic deformation of the end; and
radially contracting the collet chuck and extracting the collet chuck out of the hub shaft after the caulking.
2. The method according to claim 1 , wherein
the separated parts are urged so as to approach each other during the radially contracting of the collet chuck, and a cavity in the cylindrical portion has a tapered surface that is tapered toward a free end thereof, and
the diameter-changing portion includes a tapered member that has a tapered portion corresponding to the tapered surface, radially expands the separated parts by pushing the tapered surface with the tapered portion, and radially contracts the separated parts by retreating the tapered portion.
3. The method according to claim 1 , wherein the outer circumference of the collet chuck has an engaging shape to be engaged with the engaging portion.
4. The method according to claim 3 , wherein the outer circumference of the collet chuck is positioned in parallel with the inner circumference of the hub shaft when the collet chuck is radially expanded.
5. The method according to claim 1 , wherein the outer circumference of the collet chuck is positioned in parallel with the inner circumference of the hub shaft when the collet chuck is radially expanded.