Small teeth number difference planet gear stepless speed variator

Abstract

The present invention discloses a few tooth differential planetary gearing stepless variator which includes a box body, and an output shaft. The box body is mounted with a planetary gear train and a fixing shaft wheel train. It is characterized in that the fixing shaft wheel train is composed of a speed control gear, a speed control gear shaft, a coupler and a speed control motor; the planetary gear train includes an input crankshaft, a planet gear and a sun gear, wherein the two ends of the input crankshaft are respectively supported in the box body and the output shaft; the planet gear is support on the input shaft by a bearing, and has 1-4 gear teeth less than the sun gear and is engaged with the sun gear and is connected to the output shaft by a eccentric output mechanism; the sun gear is supported in the box body by bearing, and has gear teeth on its outer circle and is engaged with the speed control gear of the fixing shaft train. The few tooth differential planetary gearing stepless variator adjusts the rotate speed of the sun gear by independent speed adjusting device, thereby realize the object of stepless speed regulation, and can conquer the dead zone in the transmitting ratio range for the existing planet drive, and also can realize start and stop and the direction changing control.

Description

technical field [0001] The invention relates to a gear transmission device for transmitting rotary motion or reversing rotary motion with a variable speed ratio, and belongs to a planetary gear stepless transmission with few tooth differences. Background technique [0002] As we all know, planetary gear transmission has many advantages compared with fixed axis gear transmission, such as compact structure, large transmission ratio range, high transmission efficiency, stable operation and low noise, so it is widely used in metallurgy, mining, lifting transportation, chemical machinery and automotive fields. However, there are still some shortcomings and restrictions in the application of planetary gear transmission, especially in the application of planetary gear with small tooth difference. For example, in the case of small transmission ratio, it is difficult to realize the dilemma. In order to overcome this defect, people have proposed various planetary gear CVTs with new s...

AI Technical Summary

Problems solved by technology

This invention aims at overcoming the defective pointed out above, but is limited to its structural characteristic, and effect is not satisfactory

The problem is that if the transmission ratio is increased on the basis of a single-stage planetary transmission, a multi-stage transmission must be used, which will complicate the structure of the transmission and increase both volume and weight; It is impossible to achieve a smaller number of teeth and a smaller transmission ratio for the gear. In order to get rid of this contradictory dilemma, design a gear that can further expand to a small transmission ratio on the basis of ensuring the existing large transmission ratio. The single-stage transmission with few teeth differential gear CVT has important practical significance no matter for large-scale mechanical equipment with low speed and heavy load, or for transmission devices used in automobiles that need both deceleration and zero-crossing reversing

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