Automatic double-gear transmission

Abstract

The invention discloses an automatic double-gear transmission and provides a power-failure-free mechanical transmission integrating flexible transmission with rigid transmission. The automatic double-gear transmission comprises a hollow shaft, spring rings, a boss push rod, a movable boss, a driving gear, an input shaft, an engagement sleeve, a driven gear I, a driven gear II, steel balls, an output shaft, a shifting fork, a shifting fork shaft, a transmission gear set and steel ball racks; the boss push rod is installed in the center of the hollow shaft; the boss push rod is connected with the shifting fork shaft through a bolt so that the linkage between the boss push rod and the shifting fork shaft can be achieved, and therefore the movable boss and the engagement sleeve are driven to move in the axial direction. According to the transmission, the gear shifting process is simple to operate, the ectrosis sense is not obvious, and impact, collision and friction in the connection process can be reduced effectively.

Description

Technical field [0001] The invention relates to the field of mechanical transmission, in particular to a two-speed mechanical transmission suitable for low-power electric vehicles. Background technique [0002] At present, inertial synchronizers are used in most synchronous transmissions, which are mainly composed of coupling sleeves, synchronization lock rings, etc., which mainly rely on friction to achieve synchronization. When the inner cone surface of the synchronizing lock ring contacts the outer cone surface of the gear ring to be joined, the gear speed is rapidly reduced (or increased) under the action of the friction torque to be equal to the speed of the synchronizing lock ring, and the two rotate synchronously, and the gear relative to The rotation speed of the synchronizing lock ring is zero, so the moment of inertia disappears at the same time. At this time, driven by the force, the coupling sleeve is unimpededly engaged with the synchronizing lock ring gear ring, and...

AI Technical Summary

Problems solved by technology

[0003] However, this structure that achieves synchronization by friction will cause a large impact on the synchronous lock ring and the outer cone surface of the gear, and serious wear; and this synchronous transmission must use a clutch to interrupt the power of the drive shaft before shifting gears. It is cumbersome, and the power interruption when the gear is switched makes the driver feel obvious frustration

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