Rotor for rotation sensor

A rotation sensor that can be mounted on a bearing supporting a wheel on an automotive vehicle for detecting the number of revolutions of the wheel, comprising:

• a rotor comprising:
• a reinforcing ring having an L-shape in cross-section, said reinforcing ring including a cylindrical part adapted to be fitted on a peripheral surface of a rotating part of the bearing and a flanged part that is bent at an end edge of said cylindrical part and from which said flanged part extends in a radial direction of said reinforcing ring;
• a multi-pole magnet attached on an axially outer lateral side of said flanged part of said reinforcing ring;
• and
• a covering made of non-magnetic material having a peripheral edge on one end thereof secured to said reinforcing ring and enclosing an axially outer lateral side of said multi-pole magnet;
• and
• a rotation detecting sensor mounted axially outside of said rotor and adjacent to said covering so as to face opposite said axially outer lateral side of said multi-pole magnet enclosed by said covering.

A rotor for a rotation sensor that can be mounted on a bearing supporting a wheel on an automotive vehicle for detecting the number of revolutions of the wheel, said rotor comprising:

• a reinforcing ring including a cylindrical part adapted to be fitted on a peripheral surface of a rotating part of the bearing and a flanged part that is bent at an end edge of said cylindrical part and from which said flanged part extends in a radial direction of said reinforcing ring;
• a multi-pole magnet attached on an axially outer lateral side of said flanged part of said reinforcing ring;
• and
• a covering made of non-magnetic material having a peripheral edge on one end thereof secured to said reinforcing ring such that said reinforcing ring and said covering are fixed together with said multi-pole magnet between said reinforcing ring and said covering, and said covering enclosing an axially outer lateral side of said multi-pole magnet.