Reduction gear of new energy automobile

Abstract

The invention discloses a reduction gear of a new energy automobile. The reduction gear of the new energy automobile comprises a reduction gear shell, as well as a reduction mechanism, a differential,a clutch mechanism and an actuator arranged in the reduction gear shell. The differential comprises a differential shell, a pair of planetary gears, a pair of half axle gears and a pair of half axles. The clutch mechanism comprises a piston and a friction plate set. The friction plate set comprises a plurality of friction plates and pressure plates which are arranged at intervals one by one. Thefriction plates and the pressure plates are fixedly connected with the half axles and the differential shell separately. The piston can move in the axial direction of the half axles to press the friction plate set. The actuator comprises an actuating motor, a worm, a worm gear and a spur rack. An output shaft of the actuating motor is fixedly connected with the worm. The worm meshes with the wormgear. The worm gear meshes with the spur rack. The spur rack is fixedly connected with the piston. The reduction gear of the new energy automobile has a simple structure and is high in stability and reliability, and the combination and disconnection of the differential shell and the two half axles within a certain range can be realized under all driving conditions.

Description

technical field [0001] The invention relates to the technical field of vehicle reducers, in particular to a new energy vehicle reducer. Background technique [0002] New energy vehicles are one of the development directions of today's automobiles. With the increase in the number of automobiles in my country, environmental problems are becoming more and more serious, and energy conservation and emission reduction are imminent. In order to reduce the emission of harmful gases from automobiles, the Chinese government has vigorously developed new energy vehicles, and vehicle reducers have become a key point in promoting the development of the new energy automobile industry. [0003] Based on the characteristics of vehicle drive motors and the operating conditions of electric vehicles, vehicle reducers are widely used in various new energy vehicles. At present, most vehicle reducers use gear reducers, that is, through single-stage or multi-stage gear transmission to achieve dece...

AI Technical Summary

Problems solved by technology

Although the open planetary gear differential is widely used due to its simple structure and low cost, there is a problem: when the wheels on one side of the differential are on a road with low adhesion and the wheels on the other side are on a road with better adhesion When , based on the characteristics of evenly distributed torque of the open differential, the torque obtained by the wheel with better adhesion will be limited by the adhesion force utilized by the wheel with lower adhesion

At this time, if the driving force is increased, the wheels on the low adhesion side will usually slip or spin, which not only reduces the traction performance of the vehicle, but also causes energy loss, which greatly reduces the transmission efficiency and cruising range of new energy vehicles.

[0004] In the prior art, there is a method of using a mechanical device to lock the planetary gear differential to solve the technical problem that the power transmission of the traditional vehicle reducer is limited by the wheel adhesion on the side with small resistance, but the working condition of the mechanical differential lock It is relatively limited, and it is necessary to stop when connecting and disconnecting, and it is impossible to respond quickly and timely to the emergency conditions that occur when the new energy vehicle is driving, which reduces the active safety of the vehicle; The severe wear of keys, bearings and gears, etc., greatly affects the service life of the product and the driving experience of new energy vehicles

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