Central shaft of continuously variable transmission of snowmobile

Abstract

The invention discloses a central shaft of a continuously variable transmission of a snowmobile. A fixed disc (2) is fixed on one end of the central shaft (1); the central shaft (1) is a hollow shaft which is provided with an axial through hole; and an engine output shaft mounting hole is arranged along the axial line of the central shaft. The central shaft of the continuously variable transmission of the snowmobile is characterized in that: the engine output shaft mounting hole is formed by a taper hole (1a) and a screwed hole (1b) which are jointed; the large end of the taper hole (1a) is connected with the end surface of the end, which is provided with the fixed disc, of the central shaft (1); and the screwed hole (1b) is a fine-thread screwed hole. The central shaft of the continuously variable transmission of the snowmobile can ensure the concentricity and balance of the engine output shaft and a driving wheel of the continuously variable transmission and reduce the vibration during the running so as to effectively ensure the working performances of the engine and the continuously variable transmission of the snowmobile.

Description

technical field [0001] The invention relates to a continuously variable transmission mechanism, and more specifically relates to a central shaft of a continuously variable transmission of a snowmobile. Background technique [0002] The central shaft of the continuously variable transmission is the support for installing the main parts of the driving wheel, and it is also the power input part that transmits the engine power to the driving wheel. The output shaft of the engine is connected with the central shaft, and the power is transmitted from the output shaft of the engine. The current central shaft is a hollow shaft with an axis through hole, and a fixed plate is fixed at one end of the central shaft. The central shaft is provided with an engine output shaft mounting hole along its axis. The engine output shaft mounting hole is a straight hole for insertion. The shaft end is a cylindrical engine output shaft. The engine output shaft is inserted from the fixed plate end of...

AI Technical Summary

Problems solved by technology

The current central shaft is a hollow shaft with an axis through hole, and a fixed plate is fixed at one end of the central shaft. The central shaft is provided with an engine output shaft mounting hole along its axis. The engine output shaft mounting hole is a straight hole for insertion. The shaft end is a cylindrical engine output shaft. The engine output shaft is inserted from the fixed plate end of the central shaft and connected with the central shaft through a key. Since there is a gap between the output shaft mounting hole of the central shaft and the output shaft, this traditional The key connection method, the center shaft and the engine output shaft are not concentric and the coaxiality is poor, resulting in unstable power transmission, making the continuously variable transmission with a counterweight mechanism unbalanced and vibrating during operation, affecting the working performance of the engine and the continuously variable transmission. Especially for snowmobile engines with large output power, heavy load, high speed and long-term operation, the resulting imbalance and vibration are more serious.

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