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Introduces the working principle of stepless speed variator
No specific gear, which operate on similar automatic gearbox, gear jump process but the ratio changes were different from automatic gearbox, but a continuous, so the continuous and smooth power transmission. The CVT technology is continuously variable transmission technique, it uses the drive belt and variable diameter main, from the wheel matched to transfer power, continuously changing transmission ratio can be achieved, so as to get the best match of transmission and engine condition. CVT common hydraulic mechanical stepless speed changer and the metal belt cvt.
V type rubber belt, metal belt, multi disc, ball, roller rotating and other structures, mostly using roller transmission power metal band and variable radius. Through the change the active roller and the passive roller radius, to change gear ratio. The theory on the efficiency of the transmission is very high, but must be based on the power transfer load case. Because it is the use of friction between the strip and roller to transmit power, so the working condition of steel strip and roller is very harsh.
In order to effectively transfer the power, allowing no slippage between strip and roller, and the heat was generated a lot, if slippage might be made internal parts burned or serious loss. In order to increase the static friction force, the most direct way is added between the strip and roller pressure. But the friction increases, power transmission loss will increase, intangible or increase fuel consumption. And strip strength is also a key. So the CVT gearbox with high efficiency and energy saving advantage of comfort, etc.. Drawback is that the CVT gearbox generally can't bear large torque. Otherwise is to compensate for higher fuel consumption.
Stepless speed regulator and has the distinction of class type is, its transmission ratio is not constant, but a series of continuous values, for example, from 3.455 to 0.85 has been changed. CVT has the advantages of simple structure, smaller volume than traditional transmission, many gears it is neither a manual transmission, no planetary gear set automatic transmission is complex, it brought from the wheel and metal to realize stepless change ratio on the Lord, the main.
The principle is the same with the common gearbox size groups of gear does not have a control in the next, the formation of different ratio, like bicycle pedal diameter wheel and chain drives the wheels to rotate at different speeds. Due to different strength of the thrust of each gear is not one, the transmission output speed changes, so do not divide class slow rotation.
CVT uses the drive belt and variable width ratchet for power transmission, namely when the ratchet wheel change groove width corresponding elbow, change the drive wheel and the driven wheel transmission contact radius of belt transmission, the transmission belt generally with the rubber belt, metal belt and the metal chain. CVT is the real stepless, it has the advantages of light weight, small size, less parts, operating efficiency compared with AT has higher, low fuel consumption. But the disadvantage of CVT is obvious, is the drive belt is easily damaged, can not bear the heavy load, only used in the 1 liter or so low power and low torque motors, so in possession of automatic transmission rate is about 4% below. In recent years, to study the major car companies, the situation has improved. CVT will be the development direction of automatic transmission.
CVT transmission system, the traditional gear by a pair of pulleys and a steel belt replaced, each block is V structure is composed of two conical disc, engine shaft is connected through a small pulley, steel belt drive pulley. The trick in this special pulley: drive pulley structures CVT strange activity, divided into halves, can be close to or separate relative. Conical disk can be tightened or opening in the thrust hydraulic, extrusion chain steel sheet in order to regulate V groove width. When the cone disc to the medial mobile tighten, chain steel piece in extrusion cone disc to center outside of the direction of movement (centrifugal direction), contrary to the center, power transmission
Chinabase Machinery is a group of manufacturing facilities, offering one-stop solution for mechanical power transmission products in China. We can supply a full-range of power transmission products, such as chains, sprockets and plate wheels, pulleys, gearboxes, motors, couplings, gears and racks. Our product range also covers locking assemblies (clamping elements/locking device), taper bushes, QD bushes, bolt-on hubs, torque limiters, shaft collars, motor bases and motor slides, chain detachers, chain guides, universal joint, U-joint China,Y Series Motor,rod ends and yokes.
Article tags: Gearbox,Y Series Motor,Power Transmission.
