Driving structure of rectilinear motion of middle friction wheel of servo cone-pulley-type infinitely variable transmission

Abstract

A driving structure of rectilinear motion of a middle friction wheel of a servo cone-pulley-type infinitely variable transmission comprises an input wheel, a middle roller and an output wheel, wherein two ends of the input wheel and the output wheel are connected with a left side plate and a right side plate, the input wheel and the output wheel are in line contact with the middle roller individually, the middle roller is fixed on a support shaft through a conical roller bearing, the conical roller bearing is externally connected with a middle support, a through hole of the middle support is internally connected with a screw nut, a screw end of the screw nut is connected with a servo motor, an upper end and a lower end of the middle support are connected with an upper guide rail sliding block and a lower guide rail sliding block respectively, the upper and lower guide rail sliding blocks are installed on upper and lower guide rails, the upper and lower guide rails are connected on upper and lower support shafts, two ends of the upper and lower support shafts are externally connected with shaft end sleeves, and the shaft end sleeves are mounted in corresponding holes of the left and right side plates and are fixed. By the upper and lower guide rail support means, the middle friction wheel can bear larger loads, and the stability and reliability of a speed regulating system is ensured. The screw nut is driven directly for speed regulation, so a speed regulating process is fast and accurate, and the structure is compact.

Description

technical field [0001] The invention belongs to the technical field of a servo bevel-wheel continuously variable transmission, and in particular relates to a driving structure for linear motion of an intermediate friction wheel of a servo bevel-wheel continuously variable transmission. Background technique [0002] The servo cone wheel type continuously variable transmission is a transmission device whose ratio of output shaft speed to input shaft speed can be changed continuously. It mainly includes input cone wheel, output cone wheel and intermediate friction wheel. The position between can realize stepless speed change. In the limited space between the two cone wheels, the middle friction wheel is required to perform both rotational motion around its own axis and translational motion along its own axis, which puts higher demands on the support system of the friction wheel. The stepless variable speed regulation system requires accurate and timely speed regulation, so the...

AI Technical Summary

Problems solved by technology

[0003] The existing continuously variable transmission with a similar structure is the cone ring type continuously variable transmission (KRG), the intermediate rolling element is a cone ring, and the adjustment of the working position of the cone ring is realized by changing the deflection angle of the cone ring by controlling the rotation of the speed regulating bracket. This speed regulation method has the following disadvantages: the size of the cone ring is large, and the speed regulation bracket must be installed in a specific position, resulting in a large space occupied by the speed regulation mechanism; the movement of the cone ring needs to rely on the structural characteristics of the mechanism. The speed response is slow, and it cannot be positioned quickly and accurately; the cone ring only maintains the working position through unilateral restraint, the working state is unstable, and it has high requirements for the restraint mechanism

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