초록 ▼

A wheel speed sensor including an annular rotor fixed to a wheel for rotation therewith and having circumferentially distributed surface interruptions. A sensing device mounted near the rotor is fixed against rotation and includes a sensing portion opposable across an air gap to the surface interrup

A wheel speed sensor including an annular rotor fixed to a wheel for rotation therewith and having circumferentially distributed surface interruptions. A sensing device mounted near the rotor is fixed against rotation and includes a sensing portion opposable across an air gap to the surface interruptions of the rotor to produce a signal representing rotation of the surface interruptions past the sensing portion. The rotor and sensing portion are of complementary generally V-shaped cross section and are separated by a V-shaped air gap such that the output signal is substantially insensitive to relative motion between the rotor and sensing device in an axial plane of the rotor.

대표청구항 ▼

In a rotation indication system for generating signals in response to the rotation of a body, said indication system including an annular rotor mounted for rotation, said rotor having a plurality of surface interruptions circumferentially arranged thereon, and sensing means mounted near said rotor b

In a rotation indication system for generating signals in response to the rotation of a body, said indication system including an annular rotor mounted for rotation, said rotor having a plurality of surface interruptions circumferentially arranged thereon, and sensing means mounted near said rotor but fixed against rotation with said rotor, said sensing means including a sensing portion opposable across an air gap to said surface interruptions and an output portion responsive to rotation of said surface interruptions past said sensing portion for producing an electrical output signal representing the rotation of said rotor, comprising the improvement wherein said rotor and said sensing portion have complimentary substantially V-shaped cross sections in an axial plane of said rotor, the convex one of said V-shaped cross sections extending into and being spaced from the concave one of said V-shaped cross sections to define said air gap therebetween, said air gap being of correspondingly V-shaped cross section having two converging legs, the rotor having convergent V-defining surfaces which face corresponding ones of convergent V-defining surfaces on said sensing portion across corresponding legs of said V-shaped air gap.