Middle arranging type planetary gear two-shift automatic speed variator

Abstract

The present invention discloses a two-gear automatic transmission of an intermediate type planetary gear, and comprises a power device, a fixed shaft which is fixed with the stator of the power device, a transmission sleeve which is sheathed on the fixed shaft and matches the transmission of the fixed shaft, and a power output wheel which is fixedly connected with the transmission sleeve. 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 for the speed change 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, compact structure and intermediate installation method; the center of gravity does not lean back, which 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 two-speed automatic transmission with a central planetary gear. 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] Motor vehicles need to achieve intelligent control of current or throttle, and load, torque or speed are important parameters. The measurement of this index generally uses a variety of sensors to obtain relevant ...

AI Technical Summary

Problems solved by technology

But this device does not possess automatic gear shifting function, and is installed on the wheel hub from structural design, and small motorcycle or electric bicycle are lighter in weight, if installed in rear wheel central place center of gravity backward tilting, to safety belt to affect, and cannot shift gears automatically

[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. Decrease to work in the low-efficiency area, causing the motor to stall, heat up, or even stop rotating or the engine to stall when the battery increases the supply current

2. Since there is no mechanical transmission to adjust the torque and speed, relying entirely on the battery for high-current power supply will inevitably shorten the battery life. It can only be promoted and used in plain areas, and cannot be used in mountainous, hilly and heavy-load conditions, which narrows the scope of use; 3. Hub-type motors are generally installed in the center of the rear wheel and the center of gravity is tilted backward, which has an adverse effect on safe driving; 4. The installation space at the drive wheel is small, and it is difficult to accommodate automatic transmissions and other new technologies after the motor is installed; 5. Not available The self-adaptive function cannot automatically detect, correct and eliminate the driver's operation error; 6. When the vehicle speed changes suddenly, the engine or motor will run in an unsteady state, which will inevitably cause the engine or motor power and driving resistance to be difficult. match

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

[0005] Therefore, there is a need for a mid-mounted automatic transmission, which can adapt to changes in driving resistance without cutting off the driving force and automatically shift gears to solve the problem that the engine or electric motor torque-speed change is small and cannot be used on roads under complex conditions, and Small space required for installation

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