The unidirectional needle bearing, also known as the needle roller clutch, consists of a stamped outer ring and a plastic cage. The cage can be equipped with a plastic reed or a stainless steel reed to guide the needle roller. The inclined raceway and needle roller on the outer ring are used as locking devices.

One way needle bearing

Introduction of one way needle bearing

When lifting the clutch, many people will naturally think of the device on the car. In fact, there is also a kind of accessory called needle roller clutch, but it is different from the equipment on the car. It is a kind of bearing, and another name is unidirectional needle roller bearing. This kind of bearing is different from other kinds of bearings in structure. There is a groove on the surface of this kind of bearing, so it is designed.  The purpose of this paper is mainly aimed at the Diabolo manufacturing industry. In addition, some of the equipment with this structure is more widely used in the production of fitness equipment.

Needle roller bearing is different from other supporting rollers. Its structure uses supporting bearing, which is an important part of one-way bearing and plays an important role. Its installation position is on both sides of the clutch. Its main function is to carry the load, and the components that make up the supporting bearing are composed of two parts, one is needle roller, the other is plastic holding group. Rack.  In addition, different types of bearings have different parts. They are adjusted according to specific functions, so that they can be used in different fields.

To define whether a bearing is a needle bearing, we can observe whether there is a cylindrical roller in it. If there is a needle bearing, the iconic roller is called a needle bearing. Because the roller is long and small relative to the diameter of needle roller bearing, this kind of special roller is called needle roller in the row, and it is also included in the category of needle roller. The general knowledge of physics tells us that objects with very small cross-section can bear very limited loads. However, although the cross-section of the needle roller bearing is very small, its load capacity is still outstanding. Therefore, this kind of non-standard bearing is often used in many narrow or limited space situations.

If this kind of needle bearing can run freely in one direction and be locked in the other, then we call it unidirectional needle bearing. It is a special bearing different from non-standard bearing and widely used in mechanical equipment. Its classification can be determined according to the metric coefficient and the British coefficient. Each coefficient classification has many different types of needle roller bearings.

One way needle bearing picture

Installation skill of one way needle bearing

If the burr, scrap iron, dust and other foreign matters enter the unidirectional bearing, it is necessary to ensure the cleanness of the device surface and installation environment. It will cause noise and vibration when the bearing is running, and even damage the raceway and rolling body.

Because the one-way bearing must be cleaned before leaving the factory. In order to protect the surface of raceway and rolling body from corrosion, antirust oil or grease is injected between raceway and rolling body. Therefore, it must be cleaned with clean gasoline and kerosene, and then coated with clean high-quality or high-speed high-temperature lubricant before use. However, for some totally enclosed bearings and bearings coated with lubricating and anti rust dual-purpose grease, the cleanliness without cleaning has a great influence on bearing life and vibration noise.

The performance of different kinds and the same brand of lubricating grease varies greatly, so it is necessary to choose the right lubricating grease. The grease is made of base oil, thickener and additive. The allowable rotation limit is different, and the performance of the grease is also determined by the base oil thickener, which is also related to the lubrication performance. The water resistance of the thickener determines the water resistance of the grease. General low viscosity base oil is suitable for low temperature and high speed; high viscosity base oil is suitable for high temperature and high load. Different brands of grease can not be mixed, and even the same thickener grease will have bad effects on each other due to different additives.

Because only the inner ring is heated, the advantage of using induction heater: it can quickly, reliably and cleanly heat the bearing to the required temperature. The outer ring has little heat, so it can be easily installed on the shaft and installed in the seat hole.

One way needle bearing picture

Structural principle of one-way bearing

One way bearing is a kind of bearing that can rotate freely in one direction and lock in the other. One way bearing is also called overrunning clutch. It is only named according to different industries and functions. In the metal shell of one-way bearing, there are many rollers, needles or balls, and the shape of its rolling seat (cavity) makes it only roll in one direction, while in the other direction, it will produce great resistance (so-called "one-way").

Unidirectional bearing, as the name implies, is a kind of bearing that can operate freely in a single direction, but can not move and be stuck in another direction. Because the application of the industry is different, its function is also different, so its name also has many, it can be called the backstop, also can be called the overrunning clutch, in a word, we know that they are another way to call the one-way bearing. As shown in the figure, the one-way bearing has a metal shell, in which there are many rollers, needles or balls. Its structure is as follows.

One way needle bearing

1. Wind power: wind turbine bearing usually includes yaw bearing and transmission system bearing (main shaft and gearbox bearing). Changzhou needle roller bearing provides customers with yaw bearing and pitch bearing. The yaw bearing is installed at the connection part between the tower and the cabin, pitch