Variable pitch radius based star chain transmission stepless speed change device

Abstract

The invention provides a variable pitch radius based star chain transmission stepless speed change device. The device is characterized in that: a star sprocket device on a transmission main shaft is driven by adopting a motor, and forms a sprocket transmission pair by combining with a bush roller chain; the star sprocket device comprises a control wheel arranged on the transmission main shaft, and left and right auxiliary wheels which are arranged on two sides of the control wheel respectively; a control wheel stator and a control wheel rotor which are connected with the transmission main shaft are arranged on the inner diameter of the control wheel body; two rows of staggered supports are uniformly distributed on the circumference of the outer profile of the control wheel, and are connected with synchronizers on the left and right auxiliary wheels through connecting rods. According to the variable pitch based star chain transmission stepless speed change device, the problems that a conventional traditional friction type stepless gearbox can not complete power transfer without friction, a high-power stepless gearbox can not realize high push power adjustment without a hydraulic system, and a silent chain transmission stepless gearbox system has higher price and the like can be solved. The variable pitch radius based star chain transmission stepless speed change device is suitable for various heavy construction equipment under heavy-load low-speed conditions, such as middle-high class cars, machine tools, hoisting machinery, heavy-load vehicles, lorries, elevators, transmission machinery.

Description

technical field [0001] The invention relates to a star chain transmission continuously variable transmission device based on the pitch circle radius. Background technique [0002] Most of the existing continuously variable transmission devices rely on friction for transmission. For example, the metal belt push block type continuously variable transmission device uses the friction force generated between the metal belt and the cone plate for transmission. To obtain a large friction force, The metal belt has high requirements, and the metal belt is easily damaged, which affects the service life, and this type of continuously variable transmission device cannot be applied to heavy-duty, low-speed equipment and working conditions. If a continuously variable transmission device is to be used in heavy-duty, low-speed engineering equipment conditions, only by increasing the positive pressure can greater friction and high power transmission be obtained. In the existing continuously ...

AI Technical Summary

Problems solved by technology

[0002] Most of the existing continuously variable transmission devices rely on friction for transmission. For example, the metal belt push block type continuously variable transmission device uses the friction force generated between the metal belt and the cone plate for transmission. To obtain a large friction force, There are very high requirements on the metal belt, which is easily damaged and affects the service life, and this type of continuously variable transmission device cannot be used in heavy-duty, low-speed equipment and working conditions

If a continuously variable transmission device is to be used in heavy-duty, low-speed engineering equipment conditions, only by increasing the positive pressure can greater friction and high power transmission be obtained. In the existing continuously variable transmission system, hydraulic pressure is generally used. The cylinder is used to realize the adjustment of large thrust, that is, the positive pressure. Therefore, hydraulic equipment is required, but the hydraulic equipment involves a large volume of the hydraulic system and high energy consumption.

In addition, in the continuously variable transmission system, there are also some non-friction continuously variable transmission devices. For example, the toothed chain is used as the transmission medium, which can realize the transmission of motion and power at high torque and low speed, but the price of the toothed chain The price of the sleeve roller chain is higher than that of the sleeve roller chain, and the price of its continuously variable transmission system is more expensive. Generally, it can only be used in precision mechanical equipment with higher precision requirements.

Images