One way roller bearing, also known as needle roller clutch, is composed of a stamped outer ring and a plastic cage. Today, I will join you in learning its basic contents and working principles.

One way roller bearing, also known as needle roller clutch, is composed of a stamped outer ring and a plastic cage; the cage can be provided with a plastic reed or a stainless steel reed to guide the needle roller, and the inclined raceway and needle roller on the outer ring are used as locking devices. It has grooves on its surface, mainly for diabolo manufacturing enterprises. It has also launched one-way needle bearing of solid ferrule type, mainly for fitness equipment enterprises, and developed ultra-thin one-way needle bearing, mainly for precision machinery enterprises. At the same time, we specialize in the production of unidirectional bearing, special single bearing and special unidirectional bearing for remote control model car.

The main structure type is eg one-way bearing | one-way needle bearing eg -- stamping outer ring needle roller clutch (one-way bearing) can be used as converter, check device and overrunning clutch. HF (needle roller clutch): it 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, and the inclined raceway and needle roller on the outer ring are used as locking devices. HFL (clutch and bearing assembly): the supporting bearing is installed on both sides of the needle roller clutch and bears radial load. As the supporting bearing, the needle roller and plastic cage assembly are used.

Main structure:

Bearing code structure features HF steel spring stamping outer ring needle clutch HF.. KF plastic spring stamping outer ring needle clutch and bearing assembly HF.. r steel spring stamping outer ring needle clutch, outer ring part knurling HF.. KFR plastic spring stamping outer ring needle clutch and bearing assembly, outer ring part knurling HFL steel spring stamping outer ring needle clutch and bearing assembly, sliding bearing or rolling bearing.

Principle:

1. Slope and roller design

The single needle roller bearing of slope and roller type is basically composed of outer ring with inner diameter of cylinder type, inner ring with slope and a group of rollers that bear spring force and keep close contact with inner and outer rings. As long as the rotation of one raceway in its direction of motion has an impact on the other, this arrangement essentially ensures the immediacy of the surpassing speed and the immediate driving ability.

Application

This type of one-way bearing can be suitable for transcendence, indexing and check in various environments.

When used as a single needle roller bearing

The tapered roller type one-way bearing will be installed in such a way that the outer ring is used as the overrunning member. This is very important for high-speed overtaking. In the application of inner race overrunning, the centrifugal force acting on the roller will cause the overrunning speed to be limited.

When used as a check one-way bearing

Only one-way tapered roller bearing with inner ring rotation is suitable for lower speed. If the required speed is higher than the recommended speed, wedge type one-way bearing is recommended.

When used as an index unidirectional bearing

The outer ring is often regarded as a swinging element and the inner ring as a subordinate element. Otherwise, the inertia of roller and spring will lead to error, especially in high frequency indexing. The application of diluted lubricating oil and powerful spring provides the accuracy and quality of high-speed indexing.

2. Self locking angle

Wedge action mainly depends on wedge wedge and self-locking angle between inner and outer rings. The basic concept of wedge one-way bearing requires that the friction coefficient of wedge is related to the torque suddenly generated by inner ring in the driving direction, and the friction value must be greater than the tangent value of self-locking angle. If conditions are not safe, wedging will not occur.

The self-locking angle is determined by the structure of the wedge, and the points on the inner and outer rings are connected with the wedge respectively.

There is a very low initial self-locking angle in the design of wedge to ensure the absolute combination at the beginning. With the increase of torque, a radial force will be produced on the wedge, which can deflect the raceway of the wedge, causing the wedge to roll to a new position. The wedge is often designed to have a self-locking angle that can be gradually increased, just as it goes from the overrun position to the maximum load bearing position. A larger self-locking angle can reduce the radial force produced by the wedge, so as long as a larger torque is allowed to be transmitted within the requirements of elongation and Brinell hardness limit.