Stepless speed change mechanism and speed change method

Abstract

The invention discloses a stepless speed change mechanism. The stepless speed change mechanism comprises a front housing, a rear housing, a driven groove disc and a variable modulus driving device, wherein forward grooves and reverse grooves which are arranged in a crossed mode are formed in the driven groove disc at intervals; the variable modulus driving device comprises a conical input shaft, avariable diameter driving motor, a variable diameter screw rod, a variable diameter nut and a plurality of sliding claws; the taper of the input shaft is equal to the included angle between every twoadjacent forward grooves or every two adjacent reverse grooves; a dovetail groove is formed in the input shaft; the variable diameter nut is provided with a shifting claw; the sliding claws are embedded in the dovetail groove; and one end of each sliding claw is connected to the other end of the shifting claw in a sleeved mode. According to the stepless speed change mechanism, the variable diameter screw rod, the variable diameter nut and the shifting claw are arranged to drive the sliding claws to slide along the surface of the conical end of the input shaft, so that the modulus of the inputshaft is changed, the number of the sliding claws meshed with the forward grooves and the reverse grooves in the driven groove disc is changed, then the rotating speed of an output shaft is changed,stepless speed change is realized, the temperature rise is small, the power loss is small, the transmission efficiency is high, and the service life of each part is longer.

Description

technical field [0001] The invention relates to the technical field of auto parts, in particular to a continuously variable transmission mechanism and a transmission method. Background technique [0002] At present, CVTs mainly adopt structures such as steel belt type and friction ring type. These structural methods all use friction transmission, resulting in relatively low torque that the existing CVTs can bear, and basically can only be applied to small cars and other loads. Occasions, the scope of use is limited, and friction transmission can easily lead to rapid temperature rise of parts, resulting in greater power loss, low transmission efficiency, and shorter service life of parts. Contents of the invention [0003] The object of the present invention is to overcome the disadvantages mentioned above and provide a continuously variable transmission mechanism. [0004] In order to achieve the above object, the specific solution of the present invention is as follows: ...

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Problems solved by technology

[0002] At present, CVTs mainly adopt structures such as steel belt type and friction ring type. These structural methods all use friction transmission, resulting in relatively low torque that the existing CVTs can bear, and basically can only be applied to small cars and other loads. Occasions, the scope of use is limited, and friction transmission can easily lead to rapid temperature rise of parts, resulting in greater power loss, low transmission efficiency, and shorter service life of parts

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