Hub-type planetary gear two-shift automatic speed variator

Abstract

The present invention discloses a two-gear automatic transmission of a wheel hub type planetary gear, and comprises a motor arranged in a wheel hub, a fixed shaft fixed with the stator of the motor, and a transmission sleeve which is sheathed on the fixed shaft and matches the transmission of the fixed shaft. The two-gear automatic transmission also comprises a planetary gear speed change mechanism and a self-adaptive automatic gear shifting transmission assembly; wherein, the self-adaptive automatic gear shifting transmission assembly comprises a cam push rod type overrunning clutch, a low gear overrunning clutch and a variable speed spring self-adaptive annular axial cam mechanism. The present invention realizes the non-gear rigid transmission, self-adaptively and automatically shifts the gears to change the speed along with the changes of the running resistance when the driving force is not cut off, and satisfies the requirements for utilization under the condition with the mountainous area, the hill and the heavy load. The speed change is stable and slow. Simultaneously, the present invention has the advantages of small volume, light weight and compact structure, is suitable for being installed at the wheel hub and facilitates the safe running.

Description

technical field [0001] The invention relates to a transmission of a motor vehicle or mechanical power equipment, in particular to a hub type planetary gear two-speed automatic transmission. Background technique [0002] In the prior art, electric vehicles, motorcycles, and electric bicycles basically directly control the current or the speed of the throttle through the speed control handle or the accelerator pedal, or use the manual mechanical automatic transmission mechanism to realize the speed change. The operation of the handle or the accelerator pedal depends entirely on the driver's operation, which often results in a mismatch between the operation and the driving conditions, causing the engine to stall or the motor to run unstable and stalled. [0003] Electric vehicles need to achieve intelligent control of current, and load, torque or speed are important parameters. The measurement of this index generally uses a variety of sensors to obtain relevant parameters resp...

AI Technical Summary

Problems solved by technology

However, this device does not have an automatic shift function

Moreover, the combination of transmission sensing system and automatic shifting system will increase the size of the transmission, which is not suitable for application on small motorcycles and electric vehicles

[0004] Other transmission devices that are operated and controlled by the rider only based on experience without knowing the driving resistance inevitably have the following problems: 1. When starting, going uphill and with a heavy load, the motor or engine speed is forced to increase due to the increased driving resistance. Decline to work in the low-efficiency area, causing the motor to stall, heat up, or even stop rotating when the battery increases the supply current

2. Since there is no mechanical transmission to adjust the torque and speed, it can only be used in plain areas, and it cannot be used in mountainous, hilly and heavy-load conditions, which reduces the scope of use; 3. The installation space at the drive wheel is small, and it is very difficult to install the motor It is difficult to accommodate automatic transmission and other new technologies; 4. It does not have the function of self-adaptation, and cannot automatically detect, correct and eliminate the driver's operation errors; 5. When the vehicle speed changes suddenly, the engine or motor will be in an unsteady state. It will inevitably cause the power of the engine or motor to match the driving resistance

6. The continuation distance is short, the climbing ability is poor, and the adaptability range is small

What's more, existing speed changers all adopt multiple gear transmissions, which cause power energy loss, reduce transmission efficiency, and are bulky

[0005] Therefore, there is a need for an automatic transmission, which can automatically shift gears without cutting off the driving force with the change of driving resistance, and solve the problem that the engine or electric motor torque-speed change is small and cannot meet the problem of road use under complex conditions. Small space required

Images