One-way clutch bearings work principle and use scope

Figure 1 a, the working principle of the one-way clutch bearings one-way clutch bearing is a bearing of a kind, its characteristic is have the function of unidirectional rotation reverse stopper, one-way clutch, the car is widely used in the washing machine of one-way clutch and electric automotive overrunning clutch. One-way clutch bearing unit general with ball bearing and wedge type of overrunning clutch, radial force by the ball bearing, wedge torque, combined unidirectional rotation, swing dividing and is the function of the inverse and transcendence, since it has compact structure, reliable chocking and big transmission torque, etc, can satisfy the host functional space, small parts and assembly needs. 1, the principle of torque is: ( As shown in figure 2) Alien wedge evenly distribute in keeping the plane on the circumference of a circle, in the ribbon under the action of spring force, make the alien wedge always stay in contact with the inside and outside the circle. For maximum height is greater than the outer diameter of alien wedge and half of the difference between the inner ring diameter, outer face it, often in a state of slope. When outer ring clockwise, outer ring and alien wedge interface creates friction, to the center of each different wedge, tilting moment to the right, inside and outside the circle with its powerful meshing, reach the role of torque. Figure 2 when outer ring counterclockwise, the alien wedge block at the center of the tilt to the left, inside and outside the circle of the wedge, realize outer idling. 2, 1) rated torque and idling torque Rated torque of the rated torque: one-way clutch measured through different roller mesh surface fatigue strength. So the one-way clutch repeatedly rated torque is refers to the mating surface does not produce skid and harmful plastic deformation, the clutch after 106 times for alien wedge and fatigue spalling does not occur inside and outside the circle orbit plane limit moment. Internal stress because of the mating surface is outer side is larger than inner ring side, so when calculating the rated torque should be less than the compressive stress on one side of the circle. 2) Idling torque: when the one-way clutch idling, wedge between the inner ring is in a state of sliding friction torque generated by the idling torque. Wedge of overrunning clutch in institutions due to the ribbon on the role of the spring force and attached to the inside, so the size of the ribbon spring force determines the size of the idling torque. But usually strip spring force is small, plus wedge with the outer ring is synchronous rotation, when the effect of outer ring rotates the wedge block by centrifugal force, so the idling torque size is under the influence of outer ring rotation speed. Second, one-way clutch bearings use one-way clutch bearings suitable scope beyond, dividing. And non-return three aspects. 1, beyond performance beyond the use of various performance, mainly for all kinds of mechanical device speed conversion to use. Transmission parts with one-way clutch device becomes simple, to reduce the cost. Using the input 1 electric motor positive and negative rotation speed can realize stepless speed changing two in the same direction. Figure 3 is inverse drive machine by coaxial secondary variable speed as shown in figure 3, when the input shaft is right-handed, one-way clutch driven gear meshing gear 1 2 3 transfer torque, output shaft 4 sinistral increase speed. 2 in the meshing state, then one-way clutch and one-way clutch 6 is idling. When the input shaft is left-handed, one-way clutch 6 mesh gear 7 5 intermediate shaft rotates, output shaft 4 sinistral speed is reduced, the one-way clutch 2 for idling. 2, dividing continuous input shaft rotation, converted to intermittent reciprocating motion, the complete output shaft direction intermittent rotation, such as punching roller feeding, printing machinery and packaging machinery equipment, as shown in figure 4. Figure 4 continuous rotation transformation for intermittent rotary 3, prevent reverse institutions if fixed outer ring, inner ring spinning, can prevent the inner ring. For example, using in the elevator, cableway, etc. Due to one-way clutches can automatically reconciliation wedge manipulation is simple and compact structure, simplifies the mechanical transmission, it gained more and more widely in a variety of transmission system in the application.