To provide a wheel support bearing assembly, in which the sufficient proof strength of an inner race during assemblage onto the vehicle body can be secured without its function being lowered, the wheel support bearing assembly includes an outer member, an inner member, and rows of rolling elements interposed therebetween. The inner member includes an hub axle having a flange and an inner race on an inner race mount, with raceways defined in the hub axle and the inner race. The inner race has a counterbore at its inboard end. The hub axle has a plastically deformed portion which engages an axially oriented surface of the counterbore when radially outwardly crimped and does not protrude outwardly beyond an inboard end face of the inner race. The difference P between the inner race mount and an outer peripheral face of the plastically deformed portion is 0.13 mm or more.

Wheel support bearing assembly

Prosthetic hip joint having a polycrystalline diamond articulation surface and a plurality of substrate layers

Diamond-surfaced cup for use in a prosthetic joint

Prosthetic hip joint having a polycrystalline diamond compact articulation surface and a counter bearing surface

A rolling bearing with sensor includes an inner ring, an outer ring, a plurality of rolling elements disposed between the inner and outer rings, and a sensor having a detecting part detecting a state of the rolling bearing and a circuit part connected to the detecting part. The detecting part and the circuit part are attached to the rolling bearing.

Rolling bearing device and ring with sensor for the rolling bearing device

A rolling contact bearing with rotational speed measuring device, in particular a wheel bearing for motor vehicles for telemetric transmission of energy and signal between bearing and environment, insensitive to tolerances of the bearing and its surrounding parts, with simple and cost-effective construction and small dimensions. A first telemetry unit is integrated in the inter-ring seal. It comprises pulse transmitter, rotational speed sensor, telemetry electronics and a miniature coil, which is inductively coupled with a further telemetry unit, which is fitted axially outside the bearing, and which supplies the first telemetry unit with energy and receives its signals.

Rolling contact bearing with rotational speed measuring device

The roller bearing has a telemetric device (6) incorporated in the bearing seal (5), provided by a pulse source (4), a rotation sensor (7), a telemetry electronic circuit (8) and at least one mini coil (9). A cooperating telemetric device is positioned on the outside of the bearing, with a similar mini coil (13) and electronic telemetry circuit (14), for supplying the first telemetric device with electrical operating energy and receiving the signals provided by it.

Roller bearing incorporating rotation measuring device e.g. for automobile wheel bearing

Wireless transmission of data and energy is needed e.g. in medical applications and autonomous sensor systems, where the maximum size or the use of batteries are limited by system specific restrictions. A possible solution for frequencies up to 20 Mhz is the use of a transformer which consists of an air-cored and two rectangular microcoils. For simulation and optimization of the system an accurate model of the micro coil is needed to predict the terminal impedance. The model must map the geometrical and material specific parameters into the terminal impedance to avoid the use of correction factors and to obtain a wide range of validity. An accurate model is presented and verified by measurements made with realized micro coils. The model is implemented into the system simulator SABER along with other components of a sensor system. An optimization was carried out to gain optimal coil parameters. The optimization strategy is presented and the optimization was carried out to gain optimal coil parameters. The optimization strategy is presented and the optimization results agree very well with measurements made with a realized sensor system.

Modeling and optimization of microcoils for telemetric transmission at frequencies up to 20 MHz

Wenn die Anwendung von Batterien bei autarken Mikrosystemen Restriktionen unteriiegt, erfolgt die Energieversorgung durch die induktive Kopplung zweier Spulensysteme. Die verwendeten Mikrospulen (onchip coils) haben einen entscheidenden Einfluß auf den Schreibund Leseabstand des Systems. Der Artikel beschreibt die Optimierungsparameter für Mikrospulen, die mit der 3D-Tiefenlithographie und galvanischer Abscheidung hergestellt werden. Der Einfluß von Gold und Kupfer als Spulenmaterial und die Verwendung einer geeigneten Isolationsschicht wird beschrieben. Der Einfluß des Mikrospulendesigns wird anhand eines Modells und an Messungen aufgezeigt.

Optimierung von mikrospulen zur versorgung autarker telemetrischer mikrosysteme

For the application of wireless-operated microsystems, on- chip coils are manufactured by 3D UV depth lithography and electroplating. The effects of varying the following parameters were investigated: substrate material, insulation thickness, coil material, coil structure height, coil design and the effect of using an intermediate NiFe layer. The characterization is done with the help of the measured real and imaginary part of the on-chip in a continuous frequency range of 75 kHz to 30 MHz.

Marcus Weser

Papers

Rolling contact bearing with rotational speed measuring device

Roller bearing incorporating rotation measuring device e.g. for automobile wheel bearing

Modeling and optimization of microcoils for telemetric transmission at frequencies up to 20 MHz

Optimierung von mikrospulen zur versorgung autarker telemetrischer mikrosysteme

Characterization of on-chip coils for rf microsystems