Needle roller bearing for small ends of connecting rods

Introduction of Needle roller bearing for small ends of connecting rods

Needle roller bearings are mainly composed of needle rollers, inner rings, outer rings and cages. Among them, the needle rollers, with their slender shape and high hardness, provide efficient support during rolling and show remarkable performance. To reduce friction and wear. This kind of bearing has a compact structure and strong load-bearing capacity, and can adapt to high-speed and high-load working environments.

When selecting, it is necessary to select the appropriate needle roller bearing according to the specific requirements and working conditions of the engine. This includes determining the bearing capacity, rotation speed, working environment temperature and other factors. It is also necessary to consider the matching accuracy and installation method of the bearing, the small end of the connecting rod and the piston pin. When installing, you need to strictly follow the manufacturer's instructions and recommended installation steps. It is necessary to clean the bearing and installation parts to ensure that there are no oil stains, iron filings and other impurities, and then correctly install the bearing to the small end of the connecting rod and the piston pin to ensure that the inner and outer rings are closely matched, the needle rollers are evenly distributed, and the preload force is applied Adjust to ensure that the bearing will not loosen or produce excessive clearance during operation.

Needle roller bearings also offer many advantages.
High load-bearing capacity: Needle roller bearings can withstand large radial loads and impact loads, ensuring a stable connection between the connecting rod and the piston pin.
Low friction and wear: Through rolling contact, needle roller bearings significantly reduce friction and wear, improving engine efficiency and service life.
Good adaptability: Due to the slender shape and high hardness of the needle roller, the bearing can adapt to certain angular deviations and misalignment of the axis center lines, improving the stability of the system.
Compact structure: Needle roller bearings have a compact structure and take up little space, making them suitable for installation in limited spaces inside the engine.

In the engine, the small end of the connecting rod is connected to the piston pin, which bears the complex forces and movements of the piston. In order to ensure the efficiency and stability of this connection, needle roller bearings are usually used as connectors. Specifically, an inner ring is installed inside the small end of the connecting rod, and an outer ring is installed on the piston pin. The two are filled with dense needle rollers. These needle rollers roll between the inner and outer rings, converting the reciprocating motion of the piston pin into the swing of the connecting rod, and at the same time bear and transmit the force and moment of the piston movement.

Needle Roller Bearing for Small Ends of Connecting Rods play an important role in the engine. It ensures the normal operation between the connecting rod and the piston pin through an efficient and stable connection method. Its high load-bearing capacity, low friction and wear, good adaptability and compact structure also make it an ideal choice in engine design. With the continuous development of engine technology, the application of needle roller bearings will become more widespread.