差速器

nullnullnull A vehicle's wheels rotate at different speeds, mainly when turning corners. The differential is designed to drive a pair of wheels while allowing them to rotate at different speeds. In vehicles without a differential, such as karts , both driving wheels are forced to rotate at the same speed, usually on a common axle driven by a simple chain-drive mechanism. When cornering, the inner wheel needs to travel a shorter distance than the outer wheel, so with no differential, the result is the inner wheel spinning and/or the outer wheel dragging, and this results in difficult and unpredictable handling, damage to tires and roads, and strain on (or possible failure of) the entire drive train.Automobile Wheel Drive without Differentialnull A differential is a device, usually, but not necessarily, employing gears, capable of transmitting torque and rotation through three shafts, almost always used in one of two ways: in one way, it receives one input and provides two outputs—this is found in most automobiles—and in the other way, it combines two inputs to create an output that is the sum, difference, or average, of the inputs.nullFrontnullRearnullplanetary geardifferential caseplanetary gearplanetary gear shaftdriven gearSide gearSide gearnull1）bevel gear differential（锥齿轮式差速器） 2) Spur gear differential , planetary differential （圆柱式齿轮差速器） 3) Clutch pack LSD(limited slip differential) 限滑差速器null The differential is designed to drive a pair of wheels while allowing them to rotate at different speeds。nullplanetary geardifferential caseplanetary gearplanetary gear shaftdriven gearSide gearSide gearbevel gear differentialnull Input torque is applied to the ring gear (blue), which turns the entire carrier (blue). The carrier is connected to both the side gears (red and yellow) only through the planet gear (green) (visual appearances in the diagram notwithstanding). Torque is transmitted to the side gears through the planet gear. The planet gear revolves around the axis of the carrier, driving the side gears. If the resistance at both wheels is equal, the planet gear revolves without spinning about its own axis, and both wheels turn at the same rate.nullKinematic relation（1）planetary gear rotation（2）planetary gear revolutionnull