Innovative angular roller bearing improves vehicle transmission efficiency!

In automotive transmission systems, the gearbox plays a vital role in power transmission, determining the power and energy efficiency of the entire vehicle. Therefore, improving gearbox efficiency has always been the goal pursued by car manufacturers, and the main means of achieving this goal by reducing friction in the gearbox. For this application, it has introduced a new angular roller bearing with ultra-low friction.

    Angular roller bearing arrangement for gearbox shafting

    In the current gearbox, the transmission shaft mainly uses tapered roller bearings as the support bearings, and is installed in pairs at both ends of the transmission shaft. In this arrangement, in order to prevent left and right turbulence of the transmission shaft, it is necessary to add a certain pre-tightening force on the tapered roller bearing to play the role of positioning, but this axial pre-tightening force also increases the friction of the system. . At present, many car manufacturers have begun to use the combination of locating and non-locating bearings to reduce or even eliminate the axial force on the locating bearing, further reducing the friction loss of the system.

    In this positioning/non-locating bearing arrangement, deep groove ball bearings are mainly used as positioning bearings and cylindrical roller bearings as non-locating bearings. However, as a locating bearing, the deep groove ball bearing has a low bearing capacity, and the bearing size needs to be increased under the same bearing capacity as the tapered roller bearing, which imposes additional requirements on the system space. These features of deep groove ball bearings limit the use of positioning/non-locating bearing arrangements in gearboxes.

    High load bearing, low friction angular roller bearing

    In order to adopt a positioning/non-locating bearing arrangement without changing the design space, Schaeffler has developed an innovative angular roller bearing. The structural design of the bearing is similar to that of a tapered roller bearing, except that it adds a rib to the outer ring so that it can carry axial forces in both directions. An angular roller bearing can be used as a locating bearing because of the presence of two ribs. In terms of load bearing, it is different from the point contact of the ball bearing. The angular roller bearing is the line contact, so the bearing capacity of the bearing is higher while maintaining low friction. The simulation results show that in the same design space, the bearing capacity of this angular roller bearing can be increased by 40% compared with deep groove ball bearings.

    Thanks to this innovative design, the angular roller bearing combines the high load carrying capacity of tapered roller bearings with the low friction of ball bearings. It can be used as a replacement for ball bearings for positioning/non-positioning gearbox bearing arrangements. In other words, in gearbox applications, this angular roller bearing is suitable for mounting positions that require higher load carrying capacity than deep groove ball bearings, or to achieve a more compact bearing arrangement while reducing friction while maintaining constant load. Program.

    In addition to the gearbox used in traditional powertrain and hybrid systems, this angular roller bearing is also suitable for electric drive axle reduction gearboxes, helping to increase the power and system efficiency of electric vehicles. Through this innovative bearing,  once again demonstrated its outstanding innovation in technology development and continued product optimization from the details to help customers achieve their energy saving and emission reduction commitments.

ZYSL company specializes in angular roller bearing for many years. All raw materials and accessories have been carefully selected to ensure a good user experience.

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