What is the structure of the bearing bush in the car?

A bearing bush is a part used to protect the shaft, usually made of metal or plastic. It can be installed directly on the shaft to reduce friction and wear between the shaft and the bearing and extend the service life of the shaft and bearing. Bearing bushing usually comes in different shapes and sizes to accommodate different types of shafts and bearings. In mechanical equipment, bearing bush is a common part, widely used in mechanical transmission, deceleration and rotation fields.

The bearing bush is the part that directly contacts with the journal on the bearing body. The bearing bush is used on the bearing body to save valuable bearing materials and facilitate maintenance. The structure of the bearing shell has two types: integral (also known as shaft sleeve) and split. Generally, there are oil holes and oil trenches on the shaft sleeve to lubricate, and the shaft sleeves made of powder metallurgy generally do not have oil trenches.

The split bearing shell is composed of the upper and lower half tiles, and the lower bearing shell generally bears the load, and the upper bearing shell does not bear the load. The upper bearing shell is provided with an oil hole and an oil groove, and the lubricating oil is input by the oil hole and distributed to the surface of the entire bearing shell through the oil groove.

The oil trench and oil hole can only be opened in the area that does not bear the load, so as not to reduce the bearing capacity of the oil film. The axial length of the oil ditch and oil chamber should be shorter than the width of the bearing shell to avoid a large loss of oil from both ends. The shoulders at both ends of the bearing can prevent the axial movement of the copper tile and bear a certain axial force.