Stepless speed change transmission device for single row planetary gear mechanism

Abstract

The invention discloses a stepless speed change transmission device for a single row planetary gear mechanism. The stepless speed change transmission device comprises a belt type stepless speed changer, the single row planetary gear mechanism, an input shaft and an output shaft. The single row planetary gear mechanism comprises a planet carrier, a tooth ring, a sun wheel and a planet wheel. The belt type stepless speed changer comprises a driving disc and a driven disc, the planet wheel is in transmission connection with a driving gear through an idle wheel, the sun wheel is connected with the driven disc of the belt type stepless speed changer, the tooth ring is connected with the output shaft, and the driving gear and the driving disc of the belt type stepless speed changer are installed on the input shaft. According to the stepless speed change transmission device, large-range changes of the speed changer transmission ratio is obtained by small-range control of the transmission ratio changes of the belt type stepless speed changer, so that the rotating speed of an engine is low when an automobile runs at a high speed, and the economy is improved. Besides, a reverse gear mechanism does not need to be arranged independently, the manufacturing and control difficulty of a control mechanism is reduced, and the cost of the speed changer and the failure rate are also reduced.

Description

technical field [0001] The invention relates to the technical field of transmissions, in particular to a single-row planetary gear mechanism continuously variable transmission device for combined transmission of a planetary gear mechanism and a continuously variable transmission. Background technique [0002] The currently used continuously variable transmission is generally in the form of single-stage transmission. The transmission belt is used to cooperate with the driving and driven wheels with variable working diameters to transmit power, which can realize the continuous change of the transmission ratio. The common continuously variable transmissions include belt and metal. Belt type Two types of belt type continuously variable transmission. The single-stage transmission form makes the value of the total transmission ratio of the continuously variable transmission smaller. For example, the value of the total transmission ratio of the single-stage continuously variable tr...

AI Technical Summary

Problems solved by technology

The single-stage transmission form makes the value of the total transmission ratio of the continuously variable transmission smaller. For example, the value of the total transmission ratio of the single-stage continuously variable transmission used in automobiles is less than 6, so that the engine speed is high when the vehicle is running at high speed, and the economy poor

In addition, the current general continuously variable transmission needs to be specially equipped with a reverse gear and a reverse control device, which increases the difficulty of manufacturing and controlling the control mechanism, and increases the cost and failure rate of the transmission.

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