New type opeed changing transmission

Abstract

A speed transforming transmission features that different speed transforming units based on one speed-variable transmission method can be used for different machines or vehicles. One of them can implement dual-parameter control to stepless centrifugal speed reducer for high load power and high speed ratio. Another one can be used for high-power multi-shift vehicle.

Description

technical field [0001] The invention belongs to variable speed transmission device. Background technique [0002] Stepless transmissions are widely used in automobiles, motorcycles, and machinery to transmit power between the engine (motor) and the wheels (load), and have become one of the main assemblies of modern vehicles. By changing the transmission ratio, the vehicle can get different traction and speed under different usage conditions, and at the same time ensure that the engine works in the most favorable working condition range. Moreover, the continuously variable transmission device has also been paid more and more attention by the industry, and is widely used in industrial machinery. [0003] At present, the mechanical continuously variable transmission (Continuously Variable Transmission referred to as CVT) that saves fuel, reduces exhaust pollution, is convenient to operate, and travels comfortably has always been the goal pursued by people...

AI Technical Summary

Problems solved by technology

[0007] 1. Because the transmission ratio is only controlled by the speed, the engine crankshaft speed does not reach above 6500r / min, and the transmission ratio cannot always reach the minimum. When driving on urban roads, the normal speed is often within 20-40km / n, and the engine speed is at Between 3000 and 4000r / min, the transmission ratio can only be changed between 2.3 and 1.8, while motorcycles with variable speed can be driven in third or fourth gear (that is, 1.4 or 0.8 transmission ratio). 1. The reason why the continuously variable transmission motorcycle consumes more fuel than the stepped transmission motorcycle while driving at low speed

[0008] 2. When encountering a downhill slope, if the engine speed remains unchanged, the vehicle speed may be too high; if the speed is reduced, the centrifugal force will decrease, the transmission ratio will increase immediately, and the vehicle speed will drop sharply, resulting in engine braking. This type of design model can not return the accelerator too much when going downhill, the speed is not easy to control, and the fuel consumption cannot be reduced

[0009] 3. The centrifugal continuously variable transmission has only a gear ratio of 2.6 when starting, which contradicts that the vehicle should not be too impulsive when starting, so it can only rely on the centrifugal clutch to slip during starting to reduce the impulsiveness

The BUS type has a large transmission range (38.5), but the transmission power is small (2.2kw); the SC type has a large power (15kw), but the transmission range is small (4), the transmission efficiency is low (up to 59%), and various planets have no The multi-stage transmission belongs to the rotating friction of the rigid body, the geometric sliding rate is large, the production and assembly are complicated, and the volume is often in the shape of a barrel, so it is not suitable for installation.

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