Rotor for wheel speed sensor providing increased difference in output voltage of the sensor

A rotor to be used in combination with a wheel speed sensor, comprising:

• a rotor main body formed of a sheet made of a magnetic material, including an annular axial central section which is projected radially outwardly and has a plurality of holes which are arranged at equal intervals in the peripheral direction of said annular central section, each hole radially piercing wall of said annular axial central section;
• and
• first and second annular axial end sections which are coaxial and integral with said central section, said first and second annular axial end sections being formed of the magnetic material and arranged such that said annular axial central section is located between said first and second annular axial end sections, each annular axial end section having a radially outward-most surface which is located radially inward of a radially outward-most surface of said annular axial central section, each hole in said annular axial central section extending from said first annular axial end section to said second annular axial end section, wherein
• said annular axial end section includes a plurality of generally bridge-shaped embossed portions which are arranged at equal intervals in the peripheral direction of said annular axial central section, each embossed portion having a central wall part which is located radially outward of each axial end section, and first and second end wall parts which are respectively integral with opposite ends of said central wall part and integral respectively with said first and second end sections.

A rotor to be used in combination with a wheel speed sensor, comprising:

• a rotor main body formed of a sheet made of a magnetic material, including an annular axial central section which is projected radially outwardly and has a plurality of holes which are arranged at equal intervals in the peripheral direction of said annular central section, each hole radially piercing wall of said annular axial central section;
• and
• first and second annular axial end sections which are coaxial and integral with said central section, said first and second annular axial end sections being formed of the magnetic material and arranged such that said annular axial central section is located between said first and second annular axial end sections, each annular axial end section having a radially outward-most surface which is located radially inward of a radially outward-most surface of said annular axial central section, each hole in said annular axial central section extending from said first annular axial end section to said second annular axial end section, wherein
• said annular axial end section includes a plurality of generally bridge-shaped embossed portions which are arranged at equal intervals in the peripheral direction of said annular axial central section, each embossed portion having a first radially outward-most surface, and each end section having a second radially outward-most surface, a difference in radial dimension between said first radially outward-most surface and said second radially outward-most surface is not less than 1.2 mm and not more than a thickness of said sheet.

A rotor to be used in combination with a wheel speed sensor, comprising:

• a rotor main body formed of a sheet made of a magnetic material, including an annular axial central section which is projected radially outwardly and has a plurality of holes which are arranged at equal intervals in the peripheral direction of said annular central section, each hole radially piercing wall of said annular axial central section;
• first and second annular axial end sections which are coaxial and integral with said central section, said first and second annular axial end sections being formed of the magnetic material and arranged such that said annular axial central section is located between said first and second annular axial end sections, each annular axial end section having a radially outward-most surface which is located radially inward of a radially outward-most surface of said annular axial central section, each hole in said annular axial central section extending from said first annular axial end section to said second annular axial end section;
• and
• an inner ring which is disposed radially inward of said rotor main body and includes a cylindrical main body section on which said rotor main body is mounted, and an annular flange section which is formed at at least one axial end of said main body section, said annular flange section extending radially outwardly so as to be located adjacent to one of said end sections.