
Transmission bearings are key mechanical components of an automobile transmission, designed to support rotating shafts and reduce friction. If they are damaged, symptoms such as noise, increased temperature, and extraneous sounds in neutral gear appear, which requires timely repair and replacement.
Transmission bearings are key mechanical components of an automobile transmission, designed to support rotating shafts and reduce friction. If they are damaged, symptoms such as noise, increased temperature, and extraneous sounds in neutral gear appear, which requires timely repair and replacement.
● Rolling bearings: support axial and radial loads, include tapered roller, spherical roller, cylindrical roller and angular contact ball bearings; are the most commonly used bearings in gearboxes.
● Sleeve bearings: suitable for low speeds with high loads or high speeds with low loads; Bearings made of dry elastic material and friction disc bearings of wet multi-plate clutches are common.
● Needle roller bearings: typically used to support parts with high axial loads, such as transmission shafts and gears; have a compact design and high load-bearing capacity.
● Ball bearings: often used to support parts with small axial and radial loads, such as planetary gears and synchronizers; have low friction resistance and high rotation speed.
● Spherical roller bearings: able to withstand large radial and axial loads; thanks to the spherical design of the outer and inner rings, they can self-align under operating conditions; Mainly used in shock absorbers and differentials.
● Load type:Depending on the operating conditions of the gearbox, a bearing type is selected that can withstand the corresponding radial and axial loads. For heavy loads, roller bearings are preferred.
● Speed requirements:At high speeds, it is necessary to select bearings with a high maximum speed, such as deep groove ball bearings, whose maximum speed can reach 2800 rpm.
● Sealing properties:Bearings with seals (such as type 2RS1) provide better protection against dust ingress and lubricant leakage, resulting in longer service life.
● Installation fit:The fit of the bearing on the shaft and in the housing must meet tolerance requirements. It is recommended to fit the hole of the inner ring onto the shaft according to H7/h6, and to fit the outer ring into the housing according to H8/h7.