Driving structure of the linear motion of the intermediate friction wheel of the servo bevel wheel type continuously variable transmission

Abstract

A driving structure for the linear motion of the middle friction wheel of a servo bevel wheel type continuously variable transmission, including an input wheel, a middle roller and an output wheel. The rollers are in line contact, the middle roller is on the support shaft through the tapered roller bearing, the tapered roller bearing is externally connected to the middle bracket, the through hole of the middle bracket is connected to the screw nut, one end of the screw inside the screw nut is connected to the servo motor, the middle bracket is up and down The upper and lower guide rail sliders are respectively connected to the upper and lower guide rails, the upper and lower guide rails are connected to the upper and lower support shafts, and the external shaft end sleeves at both ends of the upper and lower support shafts are installed in the corresponding holes on the left and right side plates. The support method of the upper and lower double guide rails allows the middle friction wheel to carry a larger load, and also ensures the stability and reliability of the speed regulation system; the speed regulation method directly driven by the screw nut makes the speed regulation process 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...

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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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