An axle generator device the rotor of which rotates in a plane passing through the magnetic flux path of a stator having a coil with a permanent magnet core that is yieldably biased against a positive stop defining the magnetic air gap between the rotor and stator, and is further arranged to provide axial and radial deflection of the stator against the yieldable bias in the event the rotor becomes cocked or otherwise misaligned during wheel/axle assembly or disassembly, thereby providing protection of the stator against damage and ultimate generation of inaccurate speed signals.
A gradient bias magnetic field is applied to MR elements to improve precision of detection and prevent magnetic disturbance, and the structure of mounting the sensor is simplified. For this purpose, a magnet (10) is provided on the back surface side of the MR elements (12a, 12b) to generate a magnetic field at right angles with the above surfaces, and ferromagnetic members (34) are arranged on the sides of the MR elements (12a, 12b) to bend the magnetic flux .phi. generated by the magnet (10) such that a parallel bias magnetic field acts upon the MR elements (12a, 12b).
A detector detects a rotational speed of a rotating object. The detector includes a closed magnetic circuit having a magnet therein, and detects the rotational speed according to a magnetic flux alteration in the closed magnetic circuit. The detector comprises a cylindrical rotor switch, which rotates together with the rotating object, and a fixed sensor device having a magnet, an electromagnetic coil and claws constituting a magnetic switch. At least two magnetic switches are provided in the closed magnetic circuit in order to increase the flux alteration in the circuit and thereby to enhance a detection accuracy.
4159433 - Electrical speed sensor - Owned by Aisen Seiki Kabushiki Kaisha (Kariya,JP) Toyota Jidosha Kogyo Kabushiki Kaisha (Toyota,JP)
An electrical speed sensor having a pair of relatively confrontingly rotatable pole members one of which is fixed to the transmission housing of a vehicle while the other members being connected for rotation to a shaft driven by an output shaft of the transmission, characterized by provision of a shaft coupling interposed between the shaft and the said one of the pole mmebers and being rigid in torsion only, to thereby block transmitting of any deflection from the shaft to the said one of the members, with an accurate electric output from the sensor ensured.
A measuring sensing device for generating a signal corresponding to the relative rotation between two construction parts, with a rotor arranged on the rotating construction part and a stator borne on the fixed construction part, the stator being supported by one or more clamping bodies on the fixed construction part in such a way that on overcoming a considerable frictional adhesion it is slidable with respect to the fixed construction part.
A mounting assembly for a sensor (60) that senses the rotational speed of a drive shaft (70) of an aircraft turbine engine. The mounting assembly includes a bushing (30) slideably mounted within a portion of a tubular housing (10) and a spring (20) within the housing (10) for axially biasing the bushing (30). Pins (50) mounted to the housing (10) extend inwardly into slots (36) in the bushing (30) to prevent rotational movement of the bushing (30).
