Dry friction star braking type automatic two-speed planetary speed change box

Abstract

The invention discloses a dry friction star braking type automatic two-speed planetary speed change box. A high-speed-gear planet row and a low-speed-gear planet row of the dry friction star braking type automatic two-speed planetary speed change box are coaxially arranged in a box body. An input shaft penetrates a front end cover of the box body and is connected with the high-speed-gear planet row and the low-speed-gear planet row. An output shaft penetrates a rear end cover of the box body and is connected with the high-speed-gear planet row and the low-speed-gear planet row. Multiple high-speed-gear star brakes are evenly distributed and installed on the outer side of the front end cover of the box body with the input shaft as the center in the circumferential direction, and the high-speed-gear star brakes are connected with the high-speed-gear planet row. Multiple low-speed-gear star brakes are evenly distributed and installed on the outer side of the rear end cover of the box body with the output shaft as the center in the circumferential direction, and the low-speed-gear star brakes are connected with the low-speed-gear planet row. The dry friction star braking type automatic two-speed planetary speed change box is smaller in axial size and rotational inertia, long in service life, capable of achieving environmental adaptability, lower in cost and energy consumption, higher in transmission efficiency and reliability, and more excellent in performance.

Description

technical field [0001] The invention relates to the field of vehicle gearboxes, in particular to a dry-friction star brake type automatic two-speed planetary gearbox. Background technique [0002] In the traditional vehicle transmission system, the gearbox plays an important role in adjusting the speed and torque and cutting off the power of the engine and wheels, especially for hybrid and pure electric vehicles, the gearbox plays an important role in adjusting the high-efficiency driving of the engine and motor; For traditional transmissions, there are mainly manual fork transmission MT, automatic electronic shift fork transmission AMT, hydraulic automatic transmission AT and dual clutch transmission DCT. For MT, it is difficult to adapt to the demand for fast and intelligent coordinated shifting of hybrid and pure electric vehicles. For AMT, it is also difficult to meet the needs of hybrid and pure electric vehicles for fast and intelligent shifting due to the long shifti...

AI Technical Summary

Problems solved by technology

For MT, it is difficult to adapt to the needs of fast and intelligent coordinated shifting of hybrid and pure electric vehicles

For AMT, it is also difficult to meet the needs of hybrid and pure electric vehicles for fast and intelligent shifting due to the long shifting time, difficulty in quickly responding to shifting needs, power interruptions, and large shifting energy consumption.

For AT, due to the use of wet friction pair and hydraulic system, the transmission efficiency is low, the hydraulic system consumes a lot of energy, and the cost is high, and it is difficult to adapt to the needs of hybrid and pure electric vehicles.

For DCT, although the shortcomings of the above three gearboxes are solved, there are problems such as large moment of inertia, limited transmission torque, large axial size and high cost.

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