A rotational speed sensor for a skid control system for sensing the rotational speed of a prop shaft of a wheeled vehicle having a rotor mounted for rotation with a prop shaft and a stator mounted on the differential housing of the vehicle. The stator and rotor are provided with confronting circumferentially disposed teeth with the stator further including a coil for providing an output signal to the skid control system and the rotor further including a magnet for establishing a flux through the coil.
Integrated bearing intended particularly for equipping a motor-vehicle wheel hub, comprising a rotary outer ring (1) and a stationary inner ring (2); at least one row of rolling elements (3) arranged between the outer and inner rings; an annular pulser (4) fixed to the rotary ring (1) in the vicinity of one of its ends; and a sensor (5) stationary relative to the stationary ring (2) and located opposite the pulser so as to be capable of measuring the rotational speed of the outer ring in relation to the inner ring of the bearing, characterized in that it comprises a substantially annular flange (6) delimited by an inner cylindrical rim (6a) fixed to the inner ring (2) and by an outer cylindrical rim (6b) which is coaxial relative to the inner rim and on the outside of which is mounted a sensor carrier (7) equipped with means (16) for fastening a connecting cable (8) connected to the sensor, the flange covering without contact the end of the outer ring (1) where the pulser is fastened and being equipped with an orifice (6c), through which the sensor is mounted opposite the pulser.
Wheel speed sensing means for adaptive braking systems on vehicles having rotating drive line elements supported by bearings in housings, comprising teeth on one of said rotating elements and mounting an electrical pickup device in an opening in the housing in proximity to said teeth.
A pair of toothed elements of magnetically permeable material are coaxially mounted for relative rotation with their teeth spaced opposed in rotational registration. The toothed elements are further mounted in magnetic circuit with magnets and a coil whereby magnetic flux provided by the magnets follows two separate magnetically parallel flux paths including the pair of toothed elements and the coil. As the toothed elements are relatively rotated, the net reluctance of the flux path through the tooth elements varies and causes a voltage to be induced in the coil which alternates at a frequency representative of the relative speed of rotation of the toothed elements. The other of the magnetically parallel flux paths is of a fixed reluctance and does not extend through the pair of toothed elements.
A wheel speed detector for vehicles in which a stator including a coil and a magnet is secured to a stationary plate which is fitted coaxially to an axle or an axle housing so that the stator can be readily positioned coaxially with respect to the axle. The stator is also disposed between a wheel hub and a brake disc and serrations are provided on either the wheel hub or the brake disc in an opposite relation to the stator so that an alternating current is produced in the coil with a frequency correspsonding to the rotational speed of the wheel and thus the rotor.
A frequency transmitter combined with a differential gear for the transmission of signals to control the slippage of wheels of motor vehicles, which consists of a rotating toothed ring member secured at the circumference of each output shaft of the differential gear, cooperating with a stationary toothed disc that is arranged in the bearing cover of the differential gear between the bearing for the spur bevel gear and a retaining ring or the like providing a seal with respect to the outside.
