Transmission for achieving stepless speed changing in electro-mechanical actuation mode

Abstract

The invention relates to a transmission for achieving stepless speed changing in an electro-mechanical actuation mode. The transmission is composed of an input shaft, an output shaft, an actuator, a shaft ring, a belt pulley sheet, a belt and the like. An actuator push rod can stretch out or retract back under action of a feedback signal, and the belt pulley sheet is driven to stretch out or retract back accordingly, so that the diameter of a belt pulley is changed and the transmission ratio of the transmission is further changed. Compared with a transmission applied at the current stage, a method has the advantages that the structure is simple, the belt is less abraded and assembly is simple. A supporting rod assembly is used for supporting the belt pulley sheet and plays a role in fixing. An output signal is input into the actuator, closed-loop control is formed, and thus the transmission precision is effectively improved.

Description

technical field [0001] The invention belongs to the field of transmission mechanisms, and in particular relates to a transmission with electromechanical actuation to realize stepless speed change. Background technique [0002] The transmission mechanism is a mechanical device that can convert the high-speed and small torque output by the driving source into the low-speed and high-torque required by the actuator. CVTs now include mechanical CVTs, electric CVTs, and fluid CVTs. Due to its large mass, complex controller, high cost and few application scenarios, the electric drive type continuously variable transmission. Fluid continuously variable transmissions can be divided into hydraulic continuously variable transmissions and hydraulic continuously variable transmissions according to different energy transmission methods. The hydraulic continuously variable transmission transmits the kinetic energy of the hydraulic oil to the actuator, but its own structure is complicated,...

AI Technical Summary

Problems solved by technology

The traction-driven continuously variable transmission achieves a continuously variable transmission ratio through a large contact stress, so the precision of the working plane of the rotating body is high, increasing the cost, and the reliability is low, and the working life is relatively short

[0003] At present, belt-driven continuously variable transmissions are widely used in automobiles, but due to the friction between the end surface of the belt and the belt reel to transmit power, the end surface of the belt presents a "V" shape. When the push plate and the belt are worn, the push surface of the push plate will not Then there is a strict conical surface, which will cause the transmission friction to drop and slip, and then accelerate the wear, resulting in serious wear of the belt; and the movement of the push plate along the axis of the shaft is driven by a hydraulic system. The structure of the hydraulic system is cumbersome, making the entire transmission The structure is complicated, which increases the cost, and the hydraulic oil leaks, and the leaked pressure oil encounters the risk of burning when it encounters an overheated belt or push plate

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