Torque detection device, method of manufacturing torque detection device, and electric power steering system including torque detection device

摘要

A torque detection device includes: a magnetic flux collecting unit (40) that includes an annular holder (50) formed by resin molding and having a through-hole (53A) that passes through the holder (50) in a radial direction, a first magnetic flux collecting ring (41) and a second magnetic flux collecting ring (42) that are fitted to an inner periphery of the holder (50) so as not to cover the through-hole (53A), and a magnetic shield that is fitted to an outer periphery of the holder (50) so as to cover the through-hole (53A); and a sensor housing (60) that is made of resin supplied onto an outer periphery of the magnetic flux collecting unit (40), and that is formed so as to be integrated with the magnetic flux collecting unit (40).