The driving motor can realize variable idling, unlike the internal combustion engine, which needs a minimum rotational speed. We are a power transmission distributor doing business in the USA.By introducing a new type of clutch into the driveline system of an in-wheel drive electric vehicle, a flexible connection has been developed to replace the rigid one between the hub and the motor. As a result, as long as the sprag clutch is operating, it operates precisely because the contour of each sprag allows it to rotate to compensate for sprag wear.įormsprag Clutch did a great job explaining the overrunning clutches: Overrunning Clutches Application Manual.įeel free to Contact Us if you have any questions, need more information or if you are interested in purchasing a clutch. In the sprag type clutches, the sprags engage both races at constantly and infinitely changing contact points. In other types of overrunning clutches, wear is repeatedly imposed on specific fixed points, such as the single tooth of the ratchet or the same spot on each ramp of the roller clutch. In the other direction of rotation, it is locked up like a solid shaft.Ī sprag overrunning clutch delivers more torque for any given size than can be provided by a roller overrunning clutch or a ratchet. You can think of it as a one-way rolling bearing it rolls freely and smoothly in one direction. They will drive in one direction, and when rotation is reversed, or if the output rotated faster than the input, they will slip or overrun. The sprag clutches don’t need any external control.
Sprags are sized, shaped, and mounted in a way that causes them to wedge between the two races transmitting torque from one to the other when rotated in the drive direction. They consist of cylindrical inner and outer races with sprags filling the space between them. Sprag clutches belong to the family of overrunning clutches.
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