Speed change mechanism for high-speed and low-speed two-gear transmission

Abstract

The invention discloses a speed change mechanism for high-speed and low-speed two-gear transmission. The speed change mechanism comprises an input motor, an input shaft, a casing, a primary planetary gear train, a secondary planetary gear train, a spline shaft, a coupler and a load working machine, wherein the primary planetary gear train comprises a primary planet carrier, a primary roller pin and retainer component, a primary ring gear, a primary sun gear and a primary planetary gear, the secondary planetary gear train comprises a secondary planetary gear, a secondary ring gear, a secondary roller pin and retainer component and a secondary planet carrier, and the primary planetary gear and the secondary planetary gear are connected into a whole to form a duplex planet gear shaft; and an input end clutch is arranged between the primary ring gear and the casing, and an output end clutch is arranged between the shaft section of the secondary ring gear and the spline shaft. The speed change mechanism is high in integration degree and can be applied to occasions with high power, large torque and high rotating speed, the reliability and efficiency of transmission under the requirements of low mass and small size are guaranteed, the stability of the gear shifting process is improved, and the situation of power interruption is avoided.

Description

technical field [0001] The invention relates to the technical field of two-speed transmission without power interruption, in particular to a high-speed and low-speed two-speed transmission transmission mechanism including an overrunning clutch, a friction clutch and a planetary gear train. Background technique [0002] The function of the mechanical transmission mechanism is to change the movement mode, direction or speed provided by the power to meet the needs of people in different environments. For example, in the common automobile transmission system, the driver can change the gear of the car according to the driving needs to meet the driving needs; some gearboxes used in daily life can adjust the speed to the range that meets the needs and adapt to the working environment. [0003] There are three main ways to change the speed transmission of the helicopter. One is to change the speed of the piston engine through the control system, thereby changing the speed output by ...

AI Technical Summary

Problems solved by technology

The diaphragm spring clutch it uses has low separation efficiency, easy wear and low maintainability under high power and high torque; the input shaft and output shaft are connected by bearings, and the connection between input and output under high-speed conditions The vibration will be transmitted, and the reliability of the work under high torque and high speed will be reduced

[0007] Patent CN 207648065 U proposes a power shift tractor high-low gear and power reversing transmission assembly, which adopts a three-shaft arrangement and introduces three clutches to control the gears of the transmission system. There is no power interruption, but its superiority is oriented to the scene of tractors, and it is not suitable for helicopters. In the application occasions of high power and light weight of helicopters, the three rows of gears of this structure cause structural redundancy. , and the planetary gear transmission without power split will cause insufficient structural strength and relatively large overall size

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