Overhead gear shift system

Abstract

The invention discloses an overhead gear shift system. A first-gear driving chain wheel and a second-gear driving gear are fixedly sleeved on a driving shaft; a first-gear driven bidirectional-unidirectional device is fixedly sleeved on a driven shaft and is connected with the first-gear driving chain wheel by using a chain; when the driving shaft anticlockwise rotates, the first-gear driving chain wheel drives the first-gear driven bidirectional-unidirectional device to anticlockwise rotate and the first-gear driven bidirectional-unidirectional device drives the driven shaft to anticlockwise rotate; a second-gear driven bidirectional-unidirectional device is sleeved on the driven shaft; the second-gear driving gear is meshed with a second-gear driven gear in the second-gear driven bidirectional-unidirectional device; and when the driving shaft clockwise rotates, the second-gear driving gear drives the second-gear driven bidirectional-unidirectional device to anticlockwise rotate and the second-gear driven bidirectional-unidirectional device drives the driven shaft to anticlockwise rotate. The overhead gear shift system disclosed by the invention is novel in structure; and the gear shift function can be reliably achieved through a unidirectional device, the bidirectional-unidirectional devices and a ratchet mechanism.

Description

technical field [0001] The invention relates to an engine auxiliary device, in particular to an overriding gear shifting system capable of gear shifting. Background technique [0002] In the prior art, various automobiles, motorcycles, and electric bicycle transmissions are of a great variety, but they are inseparable from each other. The transmissions mainly include manual transmissions, automatic transmissions and continuously variable transmissions. The manual transmission relies on the driver to change the speed manually, which requires very high experience of the driver. The level of the driver directly affects the safety of driving and the service life of the vehicle. For inexperienced drivers, when the speed changes suddenly, It will cause the engine to run under unsteady conditions, and it is prone to problems such as off-gear and flameout; the transmission ratio rotation and shifting of the automatic transmission are carried out automatically, and the conversion of ...

AI Technical Summary

Problems solved by technology

The manual transmission relies on the driver to change the speed manually, which requires very high experience of the driver. The level of the driver directly affects the safety of driving and the service life of the vehicle. For inexperienced drivers, when the speed changes suddenly, It will cause the engine to run under unsteady conditions, and it is prone to problems such as off-gear and flameout; the transmission ratio rotation and shifting of the automatic transmission are carried out automatically, and the conversion of each gear of the mechanical transmission is based on reflecting the engine load and The vehicle speed signal system is used to control the actuators of the shift system. The driver only needs to manipulate the accelerator pedal to control the vehicle speed. However, the automatic transmission still needs to go through two processes of separation and engagement when shifting gears. The driving force is cut off before the gear, so you can obviously feel the frustration, and the mechanism is complicated and difficult to repair. At the same time, due to the limitation of the sensor technology, the response to the speed change is slow, and it is not as sensitive as the manual gear; the continuously variable transmission can realize the continuous transmission ratio. Change, so as to get the best match between the transmission system and the engine operating conditions, theoretically improve the fuel economy and power of the vehicle, improve the driver's handling convenience and the passenger's ride comfort, so it is ideal in theory Motor vehicle transmissions, therefore, are widely used in existing scooters. However, CVTs are basically used in small vehicles such as motorcycles to use belt drives, and the load torque is limited. When the torque is large, the engine will lose Turning phenomenon directly affects the power, economy and safety of the car

Images